HUD backlight adjusting method, device, equipment and medium

Abstract

The invention relates to an HUD backlight adjusting method and device, equipment and a medium. Wherein the image source of the HUD comprises a display panel and a backlight source, and the backlight source provides backlight for the display panel. The method comprises the following steps: dividing a display area of a display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element for providing backlight for the sub-area in a backlight source; determining a target backlight element corresponding to the target sub-region according to the target sub-region covered by the current display content and the corresponding relationship; determining the visual sensitivity corresponding to the target sub-region according to the display content located in the target sub-region in the current display content; and turning on a target backlight element in the backlight source, adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity, and turning off other backlight elements. The backlight power consumption of the HUD can be reduced, the light utilization rate is improved, and the display effect of a virtual image is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a HUD backlight adjustment method, device, equipment and medium. Background Art

[0002] HUD (head-up display) provides backlight for the display panel (such as TFT liquid crystal display) through a backlight source, which includes multiple backlight elements (such as LED lights). When the HUD displays content, the display panel emits image light based on the backlight provided by the backlight source. The image light is reflected by the vehicle's windshield and reaches the human eye, allowing the user to see a virtual image formed in front of the windshield.

[0003] In the prior art, when a backlight source provides backlight for a display panel, all backlight elements in the backlight source are usually controlled uniformly, that is, all backlight elements in the backlight source are set to light up and have the same luminous brightness. However, most of the display area of ​​the display panel is a black content-free area (perspective area), and the light emitted by the backlight elements corresponding to the content-free area in the backlight source will be converted into heat by means of shielding, absorption, refraction, etc., which not only makes the HUD power consumption high and the light utilization rate low, but also makes the HUD display panel more prone to heat and affects its service life. In addition, the human eye has different perception sensitivities to display content of different colors under different ambient light. The backlight control method that uniformly controls all backlight elements reduces the display effect of the virtual image and reduces the user experience. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a HUD backlight adjustment method, device, equipment and medium.

[0005] In a first aspect, the present disclosure provides a HUD backlight adjustment method, wherein the image source of the HUD includes a display panel and a backlight source, and the backlight source provides backlight for the display panel, and the method includes:

[0006] Dividing a display area of ​​the display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area;

[0007] Determining a target backlight element corresponding to the target sub-area according to the target sub-area covered by the current display content and the corresponding relationship;

[0008] Determining the visual sensitivity corresponding to the target sub-region according to the display content located in the target sub-region in the current display content;

[0009] The target backlight element in the backlight source is turned on, and the backlight brightness provided by the target backlight element is adjusted according to the visual sensitivity, and other backlight elements are turned off.

[0010] Optionally, determining the visual sensitivity corresponding to the target sub-region according to the display content in the target sub-region in the current display content includes:

[0011] Get the current ambient light brightness;

[0012] The visual sensitivity corresponding to the target sub-area is determined according to the current ambient light brightness and the display content in the current display content that is located in the target sub-area.

[0013] Optionally, before determining the visual sensitivity corresponding to the target sub-area according to the current ambient light brightness and the display content in the target sub-area in the current display content, the method further includes:

[0014] Divide the ambient light brightness into multiple brightness levels;

[0015] Divide the colors used by HUD displayable content into multiple color categories;

[0016] The visual sensitivity assigned to each color category at each brightness level is recorded to generate a visual sensitivity comparison table.

[0017] Optionally, the colors used by the HUD displayable content are divided into multiple color categories, including:

[0018] For the color gamut covered by the colors used for the HUD displayable content, the color levels are divided by region to obtain multiple color categories; or

[0019] The colors used for the HUD displayable content are divided into color levels according to RGB values ​​to obtain multiple color categories.

[0020] Optionally, determining the visual sensitivity corresponding to the target sub-area according to the current ambient light brightness and the display content in the target sub-area in the current display content includes:

[0021] Determining a target brightness level corresponding to the current ambient light brightness according to the multiple brightness levels;

[0022] Determine, according to the multiple color categories, a target color category corresponding to the color contained in the target sub-region, the color contained in the target sub-region being the color contained in the display content located in the target sub-region in the current display content;

[0023] Determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category;

[0024] The step of adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity includes:

[0025] For a first target sub-region among the target sub-regions whose visible sensitivity is less than a preset sensitivity threshold, the backlight brightness provided by the backlight element corresponding to the first target sub-region is increased.

[0026] Optionally, determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category includes:

[0027] For each of the target sub-areas, querying the visual sensitivity comparison table for the visual sensitivity corresponding to each of the target color categories at the target brightness level;

[0028] An average value of the visual sensitivities corresponding to each target color category is taken as the visual sensitivity corresponding to the target sub-region, or a minimum value of the visual sensitivities corresponding to each target color category corresponding to the target sub-region is taken as the visual sensitivity corresponding to the target sub-region.

[0029] Optionally, the increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area includes:

[0030] Increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area according to a preset backlight brightness increase value; or

[0031] Calculating a visual sensitivity difference between a second target sub-region with the highest visual sensitivity in the target sub-region and the first target sub-region;

[0032] The backlight brightness provided by the backlight element corresponding to the first target sub-area is increased according to the increase ratio corresponding to the visual sensitivity difference.

[0033] Optionally, after increasing the backlight brightness provided by the backlight element corresponding to the first sub-area, the method further includes:

[0034] Calculating a backlight brightness difference between backlight brightnesses provided by two adjacent target backlight elements;

[0035] If the backlight brightness difference is greater than a preset backlight brightness threshold, the backlight brightness provided by the first target backlight element is increased according to the increase ratio corresponding to the backlight brightness difference. The first target backlight element is the backlight element providing the smaller backlight brightness among the two adjacent target backlight elements.

[0036] Optionally, the method further includes:

[0037] monitoring the temperature of the target sub-region, and determining a sub-region in the target sub-region whose temperature is higher than a preset temperature threshold as a third target sub-region;

[0038] The display position of the displayed content in the third target sub-region is adjusted.

[0039] Optionally, adjusting the display position of the display content in the third target sub-region includes:

[0040] Move the display content in the third target sub-area to other sub-areas other than the target sub-area in the display area of ​​the display panel; or

[0041] The display content in the third target sub-region is moved to a target sub-region whose temperature is lower than a preset temperature threshold.

[0042] Optionally, the method further includes:

[0043] monitoring the overall temperature of a display area of ​​the display panel;

[0044] If the overall temperature is higher than a preset temperature threshold, reducing the size of the currently displayed content to reduce the sub-area covered by the currently displayed content; and / or,

[0045] Switching the display mode of the HUD, wherein the HUD has at least two display modes, and target sub-areas covered by current display contents in different display modes do not overlap.

[0046] Optionally, the method further includes:

[0047] Monitoring the temperature of all sub-areas of the display panel;

[0048] If the temperature of any sub-area among all the sub-areas is higher than the preset temperature threshold, the overall backlight brightness provided by the backlight source is reduced to below a first preset brightness threshold; or

[0049] The backlight brightness provided by the backlight elements corresponding to the sub-regions whose temperatures are higher than the preset temperature threshold in all the sub-regions is reduced to below the second preset brightness threshold.

[0050] In a second aspect, the present disclosure provides a HUD backlight adjustment device, the HUD comprising a display panel and a backlight source, the backlight source providing backlight for the display panel, the device comprising:

[0051] A division module, used for dividing the display area of ​​the display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area;

[0052] A corresponding module, configured to determine a target backlight element corresponding to the target sub-area according to the target sub-area covered by the current display content and the corresponding relationship;

[0053] A processing module, determining a visual sensitivity corresponding to the target sub-region according to display content in the target sub-region in the current display content;

[0054] The adjustment module is used to turn on the target backlight element in the backlight source, adjust the backlight brightness provided by the target backlight element according to the visual sensitivity, and turn off other backlight elements.

[0055] Optionally, when the processing module determines the visual sensitivity corresponding to the target sub-area based on the display content located in the target sub-area in the current display content, the processing module is specifically used to obtain the current ambient light brightness; and determine the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content.

[0056] Optionally, before determining the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content, the division module is further used to divide the ambient light brightness into multiple brightness levels; divide the colors used for HUD displayable content into multiple color categories; record the visual sensitivity assigned to each color category at each brightness level, and generate a visual sensitivity comparison table.

[0057] Optionally, when dividing the colors used by the HUD displayable content into multiple color categories, the division module is specifically used to divide the color level of the color gamut covered by the colors used by the HUD displayable content by region to obtain multiple color categories; or to divide the color level of the colors used by the HUD displayable content by RGB values ​​to obtain multiple color categories.

[0058] Optionally, when determining the visual sensitivity corresponding to the target sub-area according to the current ambient light brightness and the display content located in the target sub-area in the current display content, the processing module has a function for determining a target brightness level corresponding to the current ambient light brightness according to the multiple brightness levels; determining a target color category corresponding to the colors contained in the target sub-area according to the multiple color categories, the colors contained in the target sub-area being the colors contained in the display content located in the target sub-area in the current display content; and determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category.

[0059] When the adjustment module adjusts the backlight brightness provided by the target backlight element according to the visual sensitivity, it is used to increase the backlight brightness provided by the backlight element corresponding to a first target sub-area in the target sub-area whose visual sensitivity is less than a preset sensitivity threshold.

[0060] Optionally, when the processing module determines the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category, it is specifically used to query the visual sensitivity corresponding to each target color category under the target brightness level in the visual sensitivity comparison table for each target sub-area; take the average value of the visual sensitivity corresponding to each target color category as the visual sensitivity corresponding to the target sub-area, or take the minimum value of the visual sensitivity corresponding to each target color category corresponding to the target sub-area as the visual sensitivity corresponding to the target sub-area.

[0061] Optionally, when increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area, the adjustment module is specifically used to increase the backlight brightness provided by the backlight element corresponding to the first target sub-area according to a preset backlight brightness increase value; or calculate the visual sensitivity difference between the second target sub-area with the highest visual sensitivity among the target sub-areas and the first target sub-area; and increase the backlight brightness provided by the backlight element corresponding to the first target sub-area according to the increase ratio corresponding to the visual sensitivity difference.

[0062] Optionally, after increasing the backlight brightness provided by the backlight element corresponding to the first sub-area, the adjustment module is also used to calculate the backlight brightness difference between the backlight brightness provided by two adjacent target backlight elements; if the backlight brightness difference is greater than a preset backlight brightness threshold, the backlight brightness provided by the first target backlight element is increased according to the increase ratio corresponding to the backlight brightness difference, and the first target backlight element is the backlight element providing the smaller backlight brightness among the two adjacent target backlight elements.

[0063] Optionally, the adjustment module is further used to monitor the temperature of the target sub-region, determine a sub-region in the target sub-region whose temperature is higher than a preset temperature threshold as a third target sub-region; and adjust a display position of display content in the third target sub-region.

[0064] Optionally, when adjusting the display position of the display content in the third target sub-area, the adjustment module is specifically used to move the display content in the third target sub-area to other sub-areas that are not the target sub-area in the display area of ​​the display panel; or to move the display content in the third target sub-area to a target sub-area whose temperature is lower than a preset temperature threshold.

[0065] Optionally, the adjustment module is also used to monitor the overall temperature of the display area of ​​the display panel; if the overall temperature is higher than a preset temperature threshold, the size of the currently displayed content is reduced to reduce the sub-area covered by the currently displayed content; and / or, the display mode of the HUD is switched, the HUD has at least two display modes, and the target sub-areas covered by the currently displayed contents in different display modes do not overlap.

[0066] Optionally, the adjustment module is also used to monitor the temperature of all sub-areas of the display panel; if the temperature of any sub-area among all the sub-areas is higher than a preset temperature threshold, the overall backlight brightness provided by the backlight source is reduced to below a first preset brightness threshold; or the backlight brightness provided by the backlight elements corresponding to the sub-areas whose temperatures are higher than the preset temperature threshold in all the sub-areas is reduced to below a second preset brightness threshold.

[0067] In a third aspect, the present disclosure provides an electronic device, including:

[0068] Memory;

[0069] Processor; and

[0070] Computer programs;

[0071] The computer program is stored in the memory and is configured to be executed by the processor to implement the method as described in any one of the first aspects.

[0072] In a fourth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method as described in any one of the first aspects.

[0073] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0074] The HUD backlight adjustment method, device, equipment and medium provided by the present disclosure divide the display area of ​​the display panel into multiple sub-areas, and determine the correspondence between each sub-area and the backlight element in the backlight source that provides backlight for it, then select the sub-area covered by the current display content as the target sub-area, and determine the target backlight element that provides backlight for the target sub-area according to the above correspondence, and at the same time, according to the display content located in the target sub-area in the current display content, determine the visual sensitivity corresponding to the target sub-area, and then turn on the target backlight element to provide backlight for the target sub-area, and at the same time turn off other backlight elements in the backlight source except the target backlight element, so that the backlight element corresponding to the content-free area no longer emits light, thereby reducing the backlight power consumption of the HUD, improving the light utilization rate, avoiding the heating of the HUD display panel caused by the backlight power consumption, and adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity corresponding to the target sub-area, which can also improve the display effect of the virtual image and the user's viewing experience of the HUD. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0076] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0077] Figure 1 A flow chart of a HUD backlight adjustment method provided in an embodiment of the present disclosure;

[0078] Figure 2 A schematic diagram of an application scenario provided by an embodiment of the present disclosure;

[0079] Figure 3 A schematic diagram of the structure of a HUD backlight adjustment device provided in an embodiment of the present disclosure;

[0080] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0081] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0082] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0083] Figure 1 A flow chart of a HUD backlight adjustment method is provided in an embodiment of the present disclosure. The method can be executed by a HUD backlight adjustment device. The HUD backlight adjustment device can be implemented in software and / or hardware. The HUD backlight adjustment device can be configured in a HUD device. The image source of the HUD usually includes a display panel and a backlight source, and the backlight source provides backlight for the display panel.

[0084] Figure 2 A schematic diagram of an application scenario provided for an embodiment of the present disclosure, the scenario includes a display panel 210, a backlight source 220 and a vehicle computer 230. Among them, the display panel 210 and the backlight source 220 constitute the image source of the HUD, and the vehicle computer 230 serves as the central control device of the HUD. The image light emitted by the image source is processed by the amplifying component (such as a curved reflector) in the HUD, and then is incident on the reflective imaging part (such as the front windshield of the vehicle). After being reflected by the reflective imaging part, it is incident on the eye box range of the HUD, so that when the user's eyes are within the eye box range, the virtual image formed in front of the front windshield can be viewed. It can be understood that the HUD backlight adjustment method provided by the embodiment of the present disclosure can also be applied to other scenarios. Figure 2 In the scenario shown, the HUD backlight adjustment method can be performed by the vehicle computer 230. The method includes the following steps:

[0085] S101, dividing a display area of ​​a display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area.

[0086] For example, refer to Figure 2 , the display area of ​​the display panel 210 is divided into a plurality of sub-areas, wherein each sub-area corresponds to each backlight element of the backlight source 220 one by one, and there is a corresponding relationship between the backlight element providing backlight for the sub-area and the sub-area. For example, the sub-area 211 corresponds to the backlight element 221, and the backlight element 221 provides backlight for the sub-area 211, the sub-area 212 corresponds to the backlight element 222, and the backlight element 222 provides backlight for the sub-area 212, and so on.

[0087] The backlight element is a light emitting element, such as an LED. In some embodiments, all the backlight elements in the backlight source form a backlight element array. The display area of ​​the display panel can be divided into a plurality of sub-areas according to the arrangement of the backlight elements in the backlight source. For example, when the backlight elements are arranged in a rectangular manner, the display area of ​​the display panel can be divided into Figure 2 The multiple rectangular sub-areas shown. The division of sub-areas in the display area of ​​the display panel can be determined according to actual conditions and needs, as well as the range of the display area covered by the backlight provided by the backlight element. The divided sub-areas can also correspond to multiple backlight elements, that is, the range of the display area provided by multiple backlight elements is divided into one sub-area. For example, the range of backlight provided by backlight element 221 and backlight element 222 corresponds to the range of the display area covered by the combination of sub-area 211 and sub-area 212. The range of the display area covered by the combination of sub-area 211 and sub-area 212 is divided into one sub-area, and the backlight elements corresponding to the sub-area are the backlight elements 221 and 222 that provide backlight for it.

[0088] S102: Determine a target backlight element corresponding to the target sub-area according to the target sub-area covered by the current display content and the above correspondence.

[0089] When the vehicle computer 230 transmits the content currently required to be displayed to the display panel 210 for display, the range covered by the current display content in the display area of ​​the display panel 210 determines the target sub-area in the display area.

[0090] For example, when the display content transmitted by the vehicle computer 230 is the vehicle dashboard information, the dashboard information is displayed at the positions of sub-areas 211, 212, 213 and 214, and sub-areas 211, 212, 213 and 214 all display part of the dashboard information. Then, sub-areas 211, 212, 213 and 214 can be determined as target sub-areas.

[0091] According to the correspondence between the sub-areas and the backlight elements determined in S101, it can be determined that the backlight elements corresponding to the target sub-areas 211, 212, 213 and 214 are backlight elements 221, 222, 223 and 224 respectively, and the backlight elements 221, 222, 223 and 224 are determined as the target backlight elements, that is, the backlight elements that provide backlight for the sub-areas covered by the current display content.

[0092] S103: Determine the visual sensitivity corresponding to the target sub-region according to the display content in the target sub-region in the current display content.

[0093] Visual sensitivity refers to the degree to which the human eye perceives different colors or light intensities, including the human eye's ability to perceive colors in different spectral ranges. Since the human eye's sensitivity to different colors is not uniform, but varies within the visible spectrum, different colors have different visual sensitivities for the human eye.

[0094] When the vehicle computer 230 or the HUD backlight adjustment device determines the visual sensitivity corresponding to the target sub-area according to the display content located in the target sub-area in the current display content, the visual sensitivity corresponding to the target sub-area can be determined based on the color contained in the display content in the target sub-area.

[0095] In some embodiments, the visual sensitivity corresponding to the target sub-area is determined based on the display content located in the target sub-area in the current display content, including: obtaining the current ambient light brightness; determining the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content.

[0096] The cone cells in the human eye are cells that sense strong light and color. Cones have different sensitivities to different colors under different ambient light. Different colors can correspond to different bands and have corresponding color sensitivity curves. For example, the green wavelength has the highest sensitivity in most people's eyes, which means that the human eye can most easily detect and distinguish different green lights. In contrast, the sensitivity of red and blue light is relatively low. When the brightness of the surrounding environment is different, the sensitivity curve of each band is also different. In a darker environment, the human eye is more sensitive to colors with higher brightness, and in a brighter environment, the human eye's sensitivity to a wide range of colors will increase.

[0097] Therefore, when determining the visual sensitivity corresponding to the target sub-area, the vehicle computer 230 or the HUD backlight adjustment device can first identify the ambient light brightness parameters in the environment in front of the vehicle through ambient light sensors, cameras and other devices, and then determine the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the color contained in the display content in the target sub-area in the current display content.

[0098] In one embodiment, before determining the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content, it also includes: dividing the ambient light brightness into multiple brightness levels; dividing the colors used by the HUD displayable content into multiple color categories; recording the visual sensitivity assigned to each color category at each brightness level, and generating a visual sensitivity comparison table.

[0099] The disclosed embodiment pre-divides the brightness levels of ambient light and the color categories to which the colors used by the HUD to display content belong, and then obtains the visual sensitivity of the human eye to each color category by testing or theoretically calibrating a sample user group at each brightness level, generates a visual sensitivity comparison table, and enters the table into the vehicle system or HUD, so that the subsequent vehicle system or HUD backlight adjustment device can determine the visual sensitivity corresponding to the target sub-area by looking up the visual sensitivity comparison table.

[0100] Specifically, when dividing the ambient brightness into multiple brightness levels, the brightness levels can be divided according to the brightness level setting of the HUD, for example, the ambient light can be divided into multiple brightness levels according to the adaptive brightness adjustment mechanism of the HUD; or it can be divided more generally into two levels, bright and dark, for example, the ambient light brightness range during the day is divided into bright levels, and the ambient light brightness range at night is divided into dark levels.

[0101] When the colors used by the HUD displayable content are divided into multiple color categories, the color gamut covered by the colors used by the HUD displayable content can be divided into color levels by region to obtain multiple color categories. For example, if the colors used by the HUD displayable content are colors included in the color gamut diagram of the CIE1931 standard, the color levels are divided by region on the color gamut diagram of the CIE1931 standard, and the colors of each region correspond to a color category.

[0102] Alternatively, the colors used by the HUD displayable content can be divided into color levels according to the RGB values ​​to obtain multiple color categories. For example, colors with RGB values ​​of R<150, G<150, B<150 are divided into one color category, colors with R≥150, G<150, B<150 are divided into one color category, and so on.

[0103] Correspondingly, the visual sensitivity corresponding to the target sub-area is determined according to the current ambient light brightness and the display content located in the target sub-area in the current display content, including: determining the target brightness level corresponding to the current ambient light brightness according to multiple brightness levels; determining the target color category corresponding to the colors contained in the target sub-area according to multiple color categories, the colors contained in the target sub-area are the colors contained in the display content located in the target sub-area in the current display content; determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category.

[0104] The vehicle computer 230 or the HUD backlight adjustment device determines the brightness level to which the current ambient light brightness value belongs according to the value range of the pre-divided brightness levels, and the brightness level is the target brightness level corresponding to the current ambient light brightness value. Then, the color category to which the color contained in the displayed content in the target sub-area belongs is determined according to the pre-divided color categories, that is, the target color category. Finally, the visual sensitivity corresponding to the target sub-area is determined by searching the visual sensitivity assigned to the target color category under the target brightness level in the visual sensitivity comparison table.

[0105] Specifically, when determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category, it includes: for each target sub-area, querying the visual sensitivity corresponding to each target color category under the target brightness level in the visual sensitivity comparison table; taking the average value of the visual sensitivity corresponding to each target color category as the visual sensitivity corresponding to the target sub-area, or taking the minimum value of the visual sensitivity corresponding to each target color category corresponding to the target sub-area as the visual sensitivity corresponding to the target sub-area.

[0106] For example, in the dashboard information displayed in the target sub-areas 211, 212, 213, and 214, the vehicle computer 230 or the HUD backlight adjustment device determines that the color categories to which the colors contained therein belong are category c1 and category c2 according to the current vehicle speed image signal input to the target sub-area 211 for display. Then the vehicle computer 230 or the HUD backlight adjustment device searches in the visual sensitivity comparison table and obtains that the visual sensitivity of category c1 is a1 and the visual sensitivity of category c2 is a2 at the target brightness level. The vehicle computer 230 or the HUD backlight adjustment device can take the average value of the visual sensitivities a1 and a2 as the visual sensitivity corresponding to the target sub-area 211. Alternatively, the vehicle computer 230 or the HUD backlight adjustment device can take the minimum value between the visible sensitivities a1 and a2 as the visible sensitivity corresponding to the target sub-area, so that when the backlight brightness of the target sub-area 211 is subsequently adjusted, it can ensure that the display content of the color with the lowest visual sensitivity in the target sub-area 211 can also be clearly viewed by the user in the virtual image of the HUD imaging.

[0107] S104: Turn on the target backlight element in the backlight source, adjust the backlight brightness provided by the target backlight element according to the visual sensitivity, and turn off other backlight elements.

[0108] The vehicle computer 230 or the HUD backlight adjustment device turns on the target backlight elements 221, 222, 223 and 224 in the backlight source 220 to provide backlight for the current display content displayed in the target sub-areas 211, 212, 213 and 214, and turns off other backlight elements in the backlight source 220. When turning on the target backlight elements 221, 222, 223 and 224 in the backlight source 220, the vehicle computer 230 or the HUD backlight adjustment device will also adjust the backlight brightness provided by the target backlight elements 221, 222, 223 and 224 according to the visual sensitivity corresponding to the target sub-areas 211, 212, 213 and 214.

[0109] In some embodiments, when turning on the target backlight elements in the backlight source, the backlight brightness provided by each target backlight element, i.e., the initial backlight brightness, can be set to a preset fixed brightness value; or, based on the pixel value (e.g., RGB value) of the display content in each target sub-region, the brightness of the display content is calculated (e.g., the brightness of all pixels in the target sub-region is calculated and averaged to obtain the brightness of the display content in the target sub-region), and the brightness is mapped to a brightness value as the initial backlight brightness of the corresponding target backlight element. Then, the target backlight element is driven to emit light according to the initial backlight brightness.

[0110] Optionally, the brightness of the pixel can be obtained by calculating the pixel RGB value using the following formula:

[0111] gray=α×R+β×G+γ×B

[0112] Among them, gray is brightness, RGB values ​​R, G, B are integers from 0 to 255, and α+β+γ=1. In a specific embodiment, α=0.299, β=0.587, and γ=0.114.

[0113] The average or weighted average of the brightness of each pixel is calculated to obtain the brightness of the displayed content in each target sub-region. When calculating the weighted average, the weight of the brightness of each pixel is the square of the brightness of the pixel.

[0114] Among them, the backlight brightness provided by the target backlight element is adjusted according to the visual sensitivity, that is, on the basis of the initial backlight brightness of each target backlight element, the backlight brightness provided by the target backlight element is adjusted. For example, a preset backlight brightness increase value is added to the initial backlight brightness to obtain an adjusted backlight brightness value, and the target backlight element is driven to emit light according to the adjusted backlight brightness value, thereby improving the backlight brightness provided by the target backlight element.

[0115] In some embodiments, the backlight brightness provided by the target backlight element is adjusted according to the visual sensitivity, including: for a first target sub-area in the target sub-area whose visual sensitivity is less than a preset sensitivity threshold, increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area.

[0116] When the vehicle computer 230 or the HUD backlight adjustment device adjusts the target backlight element, for example, if the visual sensitivity corresponding to each of the target sub-areas 211 and 212 is less than the preset sensitivity threshold, the vehicle computer 230 or the HUD backlight adjustment device determines the target sub-areas 211 and 212 as the first target sub-areas. Then, the backlight brightness provided by the target backlight elements 221 and 222 corresponding to the target sub-areas 211 and 212 is increased, and the display brightness of the target sub-areas 211 and 212 is increased by increasing the backlight brightness provided by the target backlight elements 221 and 222, so that the virtual image content corresponding to the display content in the target sub-areas 211 and 212 in the virtual image of the HUD imaging is easier to be recognized by the human eye.

[0117] In one embodiment, increasing the backlight brightness provided by the backlight element corresponding to the first target sub-region includes: increasing the backlight brightness provided by the backlight element corresponding to the first target sub-region according to a preset backlight brightness increase value.

[0118] For example, the vehicle computer 230 or the HUD backlight adjustment device can add a fixed brightness value to the backlight brightness currently provided by the target backlight elements 221 and 222 (for example, the above-mentioned initial backlight brightness). The fixed brightness value can be preset or calculated, so that after the backlight brightness provided by the target backlight elements 221 and 222 is increased, the virtual image content corresponding to the display content in the target sub-areas 211 and 212 in the virtual image of the HUD imaging is easier to be recognized by the human eye.

[0119] For example, the backlight element with smaller backlight brightness provided by the target backlight elements 221 and 222 can be first determined, assuming it is the target backlight element 221, and the fixed brightness value that the target backlight element 221 should be increased is determined based on the difference between the preset sensitivity threshold and the current visible sensitivity of the target sub-area 211, and then the backlight brightness currently provided by the target backlight elements 221 and 222 are both increased by the fixed brightness value.

[0120] In one embodiment, increasing the backlight brightness provided by the backlight element corresponding to the first target sub-region includes: calculating the visual sensitivity difference between the second target sub-region with the highest visual sensitivity among the target sub-regions and the first target sub-region; and increasing the backlight brightness provided by the backlight element corresponding to the first target sub-region according to the increase ratio corresponding to the visual sensitivity difference.

[0121] In order to maintain the original contrast of the displayed content in the target sub-areas 211, 212, 213 and 214 after increasing the backlight brightness provided by the target backlight elements 221 and 222, the vehicle computer 230 or the HUD backlight adjustment device can select the sub-area with the highest visual sensitivity among the target sub-areas 211, 212, 213 and 214, assuming that the sub-area with the highest visual sensitivity is the target sub-area 214, and then calculate the visual sensitivity difference between the target sub-area 214 and the target sub-area 211, and increase the backlight brightness provided by the target backlight element 221 according to the increase ratio corresponding to the visual sensitivity difference between the two parties; calculate the visual sensitivity difference between the target sub-area 214 and the target sub-area 212, and increase the backlight brightness provided by the target backlight element 221 according to the increase ratio corresponding to the visual sensitivity difference between the two parties.

[0122] For example, the visible sensitivity difference between the target sub-area 214 and the target sub-area 211 is d1, and the visible sensitivity of the target sub-area 214 is a4. The ratio of d1 to a4 is calculated as the backlight brightness increase ratio of the target backlight element 221. The backlight brightness difference between the target backlight element 224 and the target backlight element 221 is used as the backlight brightness increase basic value. The product of the backlight brightness increase ratio and the backlight brightness increase basic value is calculated as the backlight brightness increase value of the target backlight element 221. After increasing the backlight brightness currently provided by the target backlight element 221 by the backlight brightness increase value, the target backlight element 221 is driven to emit light according to the increased backlight brightness.

[0123] The disclosed embodiment divides the display area of ​​the display panel into multiple sub-areas, determines the correspondence between each sub-area and the backlight element in the backlight source that provides backlight for it, then selects the sub-area covered by the current display content as the target sub-area, and determines the target backlight element that provides backlight for the target sub-area according to the above correspondence, and at the same time determines the visual sensitivity corresponding to the target sub-area according to the display content located in the target sub-area in the current display content, and then turns on the target backlight element to provide backlight for the target sub-area, and at the same time turns off other backlight elements in the backlight source except the target backlight element, so that the backlight element corresponding to the content-free area no longer emits light, thereby reducing the backlight power consumption of the HUD, improving the light utilization rate, avoiding the heating of the HUD display panel caused by the backlight power consumption, and adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity corresponding to the target sub-area, which can also improve the display effect of the virtual image and the user's viewing experience of the HUD.

[0124] In some embodiments, after increasing the backlight brightness provided by the backlight element corresponding to the first sub-region, it also includes: calculating the backlight brightness difference between the backlight brightness provided by two adjacent target backlight elements; if the backlight brightness difference is greater than a preset backlight brightness threshold, increasing the backlight brightness provided by the first target backlight element according to the increase ratio corresponding to the backlight brightness difference, the first target backlight element being the backlight element providing the smaller backlight brightness among the two adjacent target backlight elements.

[0125] After adjusting the backlight brightness provided by the target backlight element according to the adjustment method provided in the above embodiment, the vehicle computer 230 or the HUD backlight adjustment device will also calculate the backlight brightness difference between the backlight brightness provided by two adjacent target backlight elements. When the backlight brightness difference between two adjacent backlight elements in the target backlight element is greater than the preset backlight brightness threshold, the backlight brightness provided by the backlight element with smaller brightness among the two adjacent backlight elements will be increased according to the increase ratio corresponding to the backlight brightness difference. In this way, it can be ensured that in the display content of the HUD, there will not be too large a brightness difference between the content displayed in adjacent target sub-areas, thereby avoiding causing the driver user to feel uncomfortable when viewing the display content of the HUD.

[0126] Taking the target backlight elements 223 and 224 as an example, assuming that the backlight brightness provided by the target backlight element 223 is b3, the backlight brightness provided by the target backlight element 224 is b4, b4 is greater than b3 and the difference d2 between b4 and b3 is greater than the preset backlight brightness threshold, the vehicle computer 230 or the HUD backlight adjustment device can calculate the ratio of d2 to b4, and use the product of the ratio and the difference d2 as the increased value of the backlight brightness provided by the target backlight element 223.

[0127] The disclosed embodiment calculates the backlight brightness difference between the backlight brightness provided by two adjacent target backlight elements. When the backlight brightness difference is greater than a preset backlight brightness threshold, the backlight brightness provided by the backlight element with smaller brightness among the two adjacent target backlight elements is increased according to the increase ratio corresponding to the backlight brightness difference, thereby ensuring that there will not be an excessively large brightness difference between the contents displayed in adjacent target sub-areas, thereby avoiding causing the driver user to feel uncomfortable when viewing the displayed content of the HUD.

[0128] In some embodiments, the method further includes: monitoring the temperature of the target sub-region, determining a sub-region in the target sub-region whose temperature is higher than a preset temperature threshold as a third target sub-region; and adjusting a display position of display content in the third target sub-region.

[0129] After turning on the target backlight element, the vehicle computer 230 or the HUD backlight adjustment device will use the temperature detector to detect the temperature of the target sub-area in the display panel 210 in real time. For example, when the temperature of the target sub-area 211 is higher than the preset temperature threshold, the vehicle computer 230 or the HUD backlight adjustment device determines the target sub-area 211 as the third target sub-area, and then the vehicle computer 230 or the HUD backlight adjustment device will adjust the display position of the display content in the target sub-area 211 through the rendering engine in the HUD, so that the content is no longer displayed in the target sub-area 211, so that the target backlight element 221 corresponding to the target sub-area 211 can be turned off, so that the target sub-area 211 can be cooled down. The preset temperature threshold is a threshold to prevent the sub-area from overheating and burning the display panel.

[0130] In one embodiment, adjusting the display position of the display content in the third target sub-area includes: moving the display content in the third target sub-area to other sub-areas of the display area of ​​the display panel that are not the target sub-area; or moving the display content in the third target sub-area to a target sub-area whose temperature is lower than a preset temperature threshold.

[0131] For example, the display content in the target sub-area 211 is vehicle speed information. When the temperature of the target sub-area 211 is higher than the preset temperature threshold, the vehicle computer 230 or the HUD backlight adjustment device can adjust the display position of the vehicle speed information through the rendering engine in the HUD, and display the vehicle speed information in other sub-areas other than the target sub-area, such as sub-area 215. Then, the backlight element 225 corresponding to the sub-area 215 will be turned on to provide backlight for the sub-area 215, and the target backlight element 221 corresponding to the target sub-area 211 will be turned off to cool down the target sub-area 211.

[0132] Alternatively, the vehicle computer 230 or the HUD backlight adjustment device can also display the vehicle speed information in the target sub-area whose temperature is lower than the preset temperature threshold through the rendering engine in the HUD. For example, if the vehicle computer 230 or the HUD backlight adjustment device detects that the temperature of the target sub-area 212 is lower than the preset temperature threshold, the vehicle speed information can be moved to the target sub-area 212 for display, so that the target backlight element 221 can be turned off, thereby cooling the target sub-area 211.

[0133] The disclosed embodiment monitors the temperature of the target sub-area and then adjusts the display position of the display content in the target sub-area where the temperature is higher than a preset temperature threshold, thereby avoiding overheating of the display panel and providing safety when the HUD is used.

[0134] In some embodiments, the method further includes: monitoring the overall temperature of the display area of ​​the display panel; if the overall temperature is higher than a preset temperature threshold, reducing the size of the currently displayed content to reduce the sub-area covered by the currently displayed content; and / or,

[0135] Switch the display mode of the HUD. The HUD has at least two display modes, and the target sub-areas covered by the current display contents in different display modes do not overlap.

[0136] The vehicle computer 230 or the HUD backlight adjustment device can use a temperature detector to monitor the overall temperature of the display panel 210 in real time. When the overall temperature of the display panel 210 is higher than a preset temperature threshold, the vehicle computer 230 or the HUD backlight adjustment device can reduce the size of the currently displayed content through the rendering engine in the HUD, thereby reducing the sub-area covered by the currently displayed content.

[0137] For example, the size of the normally displayed instrument panel information covers the target sub-areas 211, 212, 213 and 214. When the vehicle computer 230 or the HUD backlight adjustment device reduces the display size of the instrument panel information through the rendering engine in the HUD, the reduced instrument panel information only covers the target sub-areas 212, 213 and 214, so that the instrument panel information is no longer displayed in the target sub-area 211. As a result, the vehicle computer 230 or the HUD backlight adjustment device can turn off the target backlight element 221, thereby reducing the number of turned-on backlight elements, thereby reducing the backlight power consumption and reducing the temperature rise of the display panel 210 caused by the backlight power consumption.

[0138] In addition, the vehicle computer 230 or the HUD backlight adjustment device switches the display mode of the HUD so that the sub-area covered by the current display content is switched. For example, the display mode of the HUD includes display mode F and display mode G. When the HUD is in display mode F, the instrument panel information is displayed in sub-areas 211 and 213, and when the HUD is in display mode G, the instrument panel information is displayed in sub-areas 212 and 214. If the overall temperature of the display panel 210 is higher than the preset temperature threshold when the HUD is in display mode F, the vehicle computer 230 or the HUD backlight adjustment device can switch the display mode of the HUD to display mode G, so that the backlight elements 221 and 223 turned on in display mode F are turned off, and the backlight elements 222 and 224 in display mode G are turned on, thereby avoiding the temperature rise of the display panel 210 caused by the backlight power consumption.

[0139] In some embodiments, the method also includes: monitoring the temperature of all sub-areas of the display panel; if the temperature of any sub-area among all sub-areas is higher than a preset temperature threshold, reducing the overall backlight brightness provided by the backlight source to below a first preset brightness threshold; or reducing the backlight brightness provided by the backlight elements corresponding to the sub-areas whose temperatures are higher than the preset temperature threshold in all sub-areas to below a second preset brightness threshold.

[0140] The vehicle computer 230 or the HUD backlight adjustment device can use a temperature detector to monitor the temperature of all sub-areas in the display panel 210 in real time. When the temperature of any sub-area in the display panel 210 is higher than the preset temperature threshold, the vehicle computer 230 or the HUD backlight adjustment device can be set to reduce the overall backlight brightness provided by the backlight source 220 to below the first preset brightness threshold, thereby reducing the temperature of the display panel 210 and preventing the display panel from burning due to high temperature.

[0141] Alternatively, the vehicle computer 230 or the HUD backlight adjustment device may be configured to reduce the backlight brightness provided by the backlight element corresponding to the sub-area of ​​the display panel 210 that is higher than the preset temperature threshold to below a second preset brightness threshold, so that the temperature of the sub-area of ​​the display panel 210 that is higher than the preset temperature threshold is reduced, thereby preventing the display panel from being burned out due to high temperature.

[0142] Figure 3 The HUD backlight adjustment device provided in the embodiment of the present disclosure is a schematic diagram of the structure. The HUD backlight adjustment device may be a component or assembly in the HUD. The HUD backlight adjustment device provided in the embodiment of the present disclosure may execute the processing flow provided in the HUD backlight adjustment method embodiment, such as Figure 3 As shown, the HUD backlight adjustment device 300 includes:

[0143] A division module 301 is used to divide the display area of ​​the display panel into a plurality of sub-areas and determine a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area;

[0144] A corresponding module 302, configured to determine a target backlight element corresponding to the target sub-region according to the target sub-region covered by the current display content and the corresponding relationship;

[0145] The processing module 303 determines the visual sensitivity corresponding to the target sub-region according to the display content in the target sub-region in the current display content;

[0146] The adjustment module 304 is used to turn on a target backlight element in the backlight source, and adjust the backlight brightness provided by the target backlight element according to the visual sensitivity, and turn off other backlight elements.

[0147] In some embodiments, when the processing module 303 determines the visual sensitivity corresponding to the target sub-area based on the display content located in the target sub-area in the current display content, it is specifically used to obtain the current ambient light brightness; determine the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content.

[0148] In some embodiments, before determining the visual sensitivity corresponding to the target sub-area based on the current ambient light brightness and the display content located in the target sub-area in the current display content, the division module 301 is also used to divide the ambient light brightness into multiple brightness levels; divide the colors used by the HUD displayable content into multiple color categories; record the visual sensitivity assigned to each color category at each brightness level, and generate a visual sensitivity comparison table.

[0149] In some embodiments, when dividing the colors used by the HUD displayable content into multiple color categories, the division module 301 is specifically used to divide the color level by region for the color gamut covered by the colors used by the HUD displayable content to obtain multiple color categories; or to divide the color level by RGB value for the colors used by the HUD displayable content to obtain multiple color categories.

[0150] In some embodiments, when the processing module 303 determines the visual sensitivity corresponding to the target sub-region according to the current ambient light brightness and the display content located in the target sub-region in the current display content, it is used to determine the target brightness level corresponding to the current ambient light brightness according to multiple brightness levels; determine the target color category corresponding to the color contained in the target sub-region according to multiple color categories, and the color contained in the target sub-region is the color contained in the display content located in the target sub-region in the current display content; determine the visual sensitivity corresponding to the target sub-region according to the visual sensitivity comparison table, the target brightness level and the target color category;

[0151] When adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity, the adjustment module 304 is used to increase the backlight brightness provided by the backlight element corresponding to the first target sub-area whose visual sensitivity is less than a preset sensitivity threshold in the target sub-area.

[0152] In some embodiments, when the processing module 303 determines the visual sensitivity corresponding to the target sub-area based on the visual sensitivity comparison table, the target brightness level and the target color category, it is specifically used to query the visual sensitivity corresponding to each target color category under the target brightness level in the visual sensitivity comparison table for each target sub-area; take the average value of the visual sensitivity corresponding to each target color category as the visual sensitivity corresponding to the target sub-area, or take the minimum value of the visual sensitivity corresponding to each target color category corresponding to the target sub-area as the visual sensitivity corresponding to the target sub-area.

[0153] In some embodiments, when increasing the backlight brightness provided by the backlight element corresponding to the first target sub-region, the adjustment module 304 is specifically used to increase the backlight brightness provided by the backlight element corresponding to the first target sub-region according to a preset backlight brightness increase value; or calculate the visual sensitivity difference between the second target sub-region with the highest visual sensitivity in the target sub-region and the first target sub-region; and increase the backlight brightness provided by the backlight element corresponding to the first target sub-region according to the increase ratio corresponding to the visual sensitivity difference.

[0154] In some embodiments, after increasing the backlight brightness provided by the backlight element corresponding to the first sub-area, the adjustment module 304 is further used to calculate the backlight brightness difference between the backlight brightness provided by two adjacent target backlight elements; if the backlight brightness difference is greater than a preset backlight brightness threshold, the backlight brightness provided by the first target backlight element is increased according to the increase ratio corresponding to the backlight brightness difference, and the first target backlight element is the backlight element providing the smaller backlight brightness among the two adjacent target backlight elements.

[0155] In some embodiments, the adjustment module 304 is further used to monitor the temperature of the target sub-region, determine a sub-region in the target sub-region whose temperature is higher than a preset temperature threshold as a third target sub-region; and adjust the display position of the display content in the third target sub-region.

[0156] In some embodiments, when adjusting the display position of the display content in the third target sub-area, the adjustment module 304 is specifically used to move the display content in the third target sub-area to other sub-areas of the display area of ​​the display panel that are not the target sub-area; or to move the display content in the third target sub-area to a target sub-area whose temperature is lower than a preset temperature threshold.

[0157] In some embodiments, the adjustment module 304 is also used to monitor the overall temperature of the display area of ​​the display panel; if the overall temperature is higher than a preset temperature threshold, the size of the currently displayed content is reduced to reduce the sub-area covered by the currently displayed content; and / or, the display mode of the HUD is switched, and the HUD has at least two display modes, and the target sub-areas covered by the currently displayed content in different display modes do not overlap.

[0158] In some embodiments, the adjustment module 304 is also used to monitor the temperature of all sub-areas of the display panel; if the temperature of any sub-area among all sub-areas is higher than a preset temperature threshold, the overall backlight brightness provided by the backlight source is reduced to below a first preset brightness threshold; or the backlight brightness provided by the backlight elements corresponding to the sub-areas whose temperatures are higher than the preset temperature threshold in all sub-areas is reduced to below a second preset brightness threshold.

[0159] Figure 3The HUD backlight adjustment device of the illustrated embodiment can be used to implement the technical solution of the above-mentioned method embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0160] Figure 4 Schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. The electronic device may be the HUD backlight adjustment device as described in the above embodiment. The electronic device provided in an embodiment of the present disclosure may execute the processing flow provided in the HUD backlight adjustment method embodiment, such as Figure 4 As shown, the electronic device 400 includes: a memory 401, a processor 402, a computer program and a communication interface 403; wherein the computer program is stored in the memory 401 and is configured to be executed by the processor 402 to perform the HUD backlight adjustment method as described above. In a specific embodiment, the memory 401 may be a non-volatile solid-state memory. In a specific embodiment, the memory 401 includes a read-only memory ROM (Read-Only Memory). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (Programmable ROM, PROM), an erasable PROM (ElectricalProgrammable ROM, EPROM), an electrically erasable PROM (Electrically Erasable Programmable ROM, EEPROM), an electrically alterable ROM (Electrically Alterable ROM, EAROM) or a flash memory, or a combination of two or more of these.

[0161] In addition, the embodiment of the present disclosure further provides a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to implement the HUD backlight adjustment method described in the above embodiment. The storage medium may be a non-volatile / non-temporary computer-readable storage medium, for example, the non-volatile / non-temporary computer-readable storage medium may be a ROM, a random access memory (Random Access Memory, RAM), a compact disc read-only memory (CompactDisc ROM, CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0162] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0163] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A HUD backlight adjustment method, wherein the image source of the HUD includes a display panel and a backlight source, and the backlight source provides backlight for the display panel, characterized in that: The method comprises: Dividing a display area of ​​the display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area; Determining a target backlight element corresponding to the target sub-area according to the target sub-area covered by the current display content and the corresponding relationship; Determining the visual sensitivity corresponding to the target sub-region according to the display content located in the target sub-region in the current display content; The target backlight element in the backlight source is turned on, and the backlight brightness provided by the target backlight element is adjusted according to the visual sensitivity, and other backlight elements are turned off.

2. The method according to claim 1, characterized in that The determining, according to the display content in the target sub-region in the current display content, the visual sensitivity corresponding to the target sub-region includes: Get the current ambient light brightness; The visual sensitivity corresponding to the target sub-area is determined according to the current ambient light brightness and the display content in the current display content that is located in the target sub-area.

3. The method according to claim 2, characterized in that Before determining the visual sensitivity corresponding to the target sub-area according to the current ambient light brightness and the display content in the target sub-area in the current display content, the method further includes: Divide the ambient light brightness into multiple brightness levels; Divide the colors used by HUD displayable content into multiple color categories; The visual sensitivity assigned to each color category at each brightness level is recorded to generate a visual sensitivity comparison table.

4. The method according to claim 3, characterized in that The colors used by the HUD displayable content are divided into multiple color categories, including: For the color gamut covered by the colors used for the HUD displayable content, the color levels are divided by region to obtain multiple color categories; or The colors used for the HUD displayable content are divided into color levels according to RGB values ​​to obtain multiple color categories.

5. The method according to claim 3, characterized in that The determining, according to the current ambient light brightness and the display content in the target sub-area of ​​the current display content, the visual sensitivity corresponding to the target sub-area includes: Determining a target brightness level corresponding to the current ambient light brightness according to the multiple brightness levels; Determine, according to the multiple color categories, a target color category corresponding to the color contained in the target sub-region, the color contained in the target sub-region being the color contained in the display content located in the target sub-region in the current display content; Determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category; The step of adjusting the backlight brightness provided by the target backlight element according to the visual sensitivity includes: For a first target sub-region among the target sub-regions whose visible sensitivity is less than a preset sensitivity threshold, the backlight brightness provided by the backlight element corresponding to the first target sub-region is increased.

6. The method according to claim 5, characterized in that The determining the visual sensitivity corresponding to the target sub-area according to the visual sensitivity comparison table, the target brightness level and the target color category includes: For each of the target sub-areas, querying the visual sensitivity comparison table for the visual sensitivity corresponding to each of the target color categories at the target brightness level; An average value of the visual sensitivities corresponding to each target color category is taken as the visual sensitivity corresponding to the target sub-region, or a minimum value of the visual sensitivities corresponding to each target color category corresponding to the target sub-region is taken as the visual sensitivity corresponding to the target sub-region.

7. The method according to claim 5, characterized in that The step of increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area includes: Increasing the backlight brightness provided by the backlight element corresponding to the first target sub-area according to a preset backlight brightness increase value; or Calculating a visual sensitivity difference between a second target sub-region with the highest visual sensitivity in the target sub-region and the first target sub-region; The backlight brightness provided by the backlight element corresponding to the first target sub-area is increased according to the increase ratio corresponding to the visual sensitivity difference.

8. The method according to claim 5, characterized in that After increasing the backlight brightness provided by the backlight element corresponding to the first sub-area, the method further includes: Calculating a backlight brightness difference between backlight brightnesses provided by two adjacent target backlight elements; If the backlight brightness difference is greater than a preset backlight brightness threshold, the backlight brightness provided by the first target backlight element is increased according to the increase ratio corresponding to the backlight brightness difference. The first target backlight element is the backlight element providing the smaller backlight brightness among the two adjacent target backlight elements.

9. The method according to claim 1, characterized in that The method further comprises: monitoring the temperature of the target sub-region, and determining a sub-region in the target sub-region whose temperature is higher than a preset temperature threshold as a third target sub-region; The display position of the displayed content in the third target sub-region is adjusted.

10. The method according to claim 9, characterized in that The adjusting the display position of the display content in the third target sub-area includes: Move the display content in the third target sub-area to other sub-areas other than the target sub-area in the display area of ​​the display panel; or The display content in the third target sub-region is moved to a target sub-region whose temperature is lower than a preset temperature threshold.

11. The method according to claim 1, characterized in that The method further comprises: monitoring the overall temperature of a display area of ​​the display panel; If the overall temperature is higher than a preset temperature threshold, reducing the size of the currently displayed content to reduce the sub-area covered by the currently displayed content; and / or, Switching the display mode of the HUD, wherein the HUD has at least two display modes, and target sub-areas covered by current display contents in different display modes do not overlap.

12. The method according to claim 1, characterized in that The method further comprises: Monitoring the temperature of all sub-areas of the display panel; If the temperature of any sub-area among all the sub-areas is higher than the preset temperature threshold, the overall backlight brightness provided by the backlight source is reduced to below a first preset brightness threshold; or The backlight brightness provided by the backlight elements corresponding to the sub-regions whose temperatures are higher than the preset temperature threshold in all the sub-regions is reduced to below the second preset brightness threshold.

13. A HUD backlight adjustment device, the HUD comprising a display panel and a backlight source, the backlight source providing backlight for the display panel, characterized in that: The device comprises: A division module, used for dividing the display area of ​​the display panel into a plurality of sub-areas, and determining a corresponding relationship between each sub-area and a backlight element in a backlight source that provides backlight for the sub-area; A corresponding module, configured to determine a target backlight element corresponding to the target sub-area according to the target sub-area covered by the current display content and the corresponding relationship; A processing module, determining a visual sensitivity corresponding to the target sub-region according to display content in the target sub-region in the current display content; The adjustment module is used to turn on the target backlight element in the backlight source, adjust the backlight brightness provided by the target backlight element according to the visual sensitivity, and turn off other backlight elements.

14. An electronic device, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 12.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 12 is implemented.

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