Display device and image brightness adjusting method of display device

Abstract

The embodiment of the invention belongs to the display equipment technology, and provides display equipment and an image brightness adjusting method of the display equipment. The display screen is divided into a plurality of display partitions for displaying images in the plurality of display partitions. The processor is used for performing first brightness mapping processing on the images in the plurality of display partitions to obtain the processed images in the plurality of display partitions and first brightness thereof, acquiring pixel gray levels of the processed images in the plurality of display partitions, determining a first display partition and a second display partition from the plurality of display partitions, and displaying the first display partition and the second display partition in the plurality of display partitions. Performing second brightness mapping processing on the image in the first display subarea to obtain the processed image in the first display subarea and the second brightness thereof, and performing fitting processing on the second brightness of the image in the first display subarea and the first brightness of the image in the second display subarea to obtain target brightness, and the display screen displays an image corresponding to the target brightness. According to the invention, the display of the image is not too bright or too dark, and the user experience is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to display device technologies. More specifically, it relates to a display device and an image brightness adjustment method for a display device. Background Art

[0002] With the rapid development of display devices, users have put forward higher requirements for the displayed images of display devices. The clearer the display brightness of the images, the better the viewing experience of users.

[0003] In related technologies, when adjusting the image display brightness of a display device, usually the full-screen white-field brightness of the display device is obtained, and brightness mapping (Tone Mapping) processing is performed according to the fixed full-screen white-field brightness of the display device to obtain an image after brightness processing. Among them, the purpose of brightness mapping processing is to enable high-brightness content of HDR videos to retain image details and colors on low-brightness display devices.

[0004] However, the above method is likely to make the brightness of the displayed image too bright, resulting in unclear brightness levels and detail performance of the image. Summary of the Invention

[0005] Embodiments of the present application provide a display device and an image brightness adjustment method for a display device, which can be used to solve the technical problem that the brightness of the adjusted image in the prior art is too bright, affecting the brightness levels and detail performance of the image.

[0006] In a first aspect, embodiments of the present application provide a display device, where the display device includes: a display screen, and the display screen is divided into multiple display partitions;

[0007] The display screen is configured to: display images in multiple display partitions;

[0008] A processor connected to the display screen, and the processor is configured to: perform first brightness mapping processing on images in multiple display partitions to obtain images in multiple display partitions after processing and their first brightness;

[0009] Obtain the pixel grayscale of images in multiple display partitions after processing;

[0010] According to the pixel grayscale, determine a first display partition in which the pixel grayscale exceeds a target pixel grayscale and a second display partition in which the pixel grayscale does not exceed the target pixel grayscale from multiple display partitions;

[0011] Perform second brightness mapping processing on the images in the first display partition to obtain images in the first display partition after processing and their second brightness;

[0012] Perform a fitting process on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image;

[0013] The display screen is further configured to: display an image corresponding to the target brightness according to the target brightness.

[0014] In this application, the processor first performs a first brightness mapping process on the images in multiple display partitions, and then obtains the pixel grayscales of the images in each display partition after processing. For the images in the first display partition whose pixel grayscales exceed the target pixel grayscale, a second brightness mapping process is performed to obtain the second brightness of the images in the first display partition after processing. And maintain the first brightness of the images in the second display partition whose pixel grayscales do not exceed the target pixel grayscale. Furthermore, a fitting process is performed on the second brightness of the images in the first display partition and the first brightness of the images in the second display partition to obtain the target brightness of the full-screen image. This application neither makes the displayed image too bright nor makes the dark field details of the displayed image too dark, improving the brightness display effect of the image.

[0015] In some embodiments of this application, when the processor is configured to perform a first brightness mapping process on the images in multiple display partitions to obtain the images in multiple display partitions after processing and their first brightness, it specifically includes:

[0016] Obtain the first full-screen white field brightness of the display screen;

[0017] Based on the first full-screen white field brightness, perform a first brightness mapping process on the images in multiple display partitions in the display screen according to a preset brightness mapping algorithm to obtain the images in multiple display partitions after processing and their first brightness.

[0018] In this application, the processor obtains the first full-screen white field brightness of the display screen and performs a first brightness mapping process according to this first full-screen white field brightness, so that the first brightness of the obtained image initially meets the viewing needs of users.

[0019] In some embodiments of this application, when the processor is configured to determine, according to the pixel grayscales, a first display partition in which the pixel grayscales exceed the target pixel grayscale and a second display partition in which the pixel grayscales do not exceed the target pixel grayscale from multiple display partitions, it specifically includes:

[0020] Determine the target pixel grayscale corresponding to the first full-screen white field brightness according to the mapping relationship between the pixel grayscales and the full-screen white field brightness in the preset high dynamic range imaging (HDR);

[0021] From multiple said display partitions, determine, as the first display partition, a display partition in which the pixel grayscale of the image in the display partition exceeds the target pixel grayscale;

[0022] From multiple said display partitions, determine, as the second display partition, a display partition in which the pixel grayscale of the image in the display partition does not exceed the target pixel grayscale.

[0023] In this application, the processor determines the first display partition and the second display partition according to the magnitude relationship between the pixel grayscale of the image in each display partition and the target pixel grayscale, which is convenient for subsequently performing a second brightness mapping process only on the image in the first display partition, making the brightness adjustment of the image in the second display partition more accurate.

[0024] In some embodiments of this application, when the processor is configured to perform a second brightness mapping process on the image in the first display partition to obtain the image in the first display partition after processing and its second brightness, it specifically includes:

[0025] Obtain the backlight brightness gain corresponding to the image in the first display partition;

[0026] According to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white-field brightness, determine the second full-screen white-field brightness of the first display partition;

[0027] According to the second full-screen white-field brightness, perform a second brightness mapping process on the image in the first display partition to obtain the image in the first display partition after processing and its second brightness.

[0028] In this application, the processor determines the second full-screen white-field brightness through the backlight brightness gain corresponding to the image in the first display partition obtained and the first full-screen white-field brightness, and then performs a second brightness mapping process according to the second full-screen white-field brightness. By adjusting the brightness according to the peak brightness gain, the brightness of the image in the first display partition obtained is more in line with the user's viewing requirements.

[0029] In some embodiments of this application, when the processor is configured to obtain the backlight brightness gain corresponding to the image in the first display partition, it specifically includes:

[0030] Based on a preset regional backlight extraction algorithm, extract the backlight brightness corresponding to the images in multiple said display partitions after processing, where the display partitions include the first display partition and the second display partition;

[0031] Perform a filtering process on the backlight brightness corresponding to the images in multiple said display partitions after processing to obtain the filtered backlight brightness;

[0032] Calculate the mean value of the backlight brightness after the filtering process to obtain the average backlight brightness;

[0033] According to the preset mapping relationship between the average backlight brightness and the backlight brightness gain, determine the backlight brightness gain corresponding to the average backlight brightness, where the backlight brightness gain is the backlight brightness gain corresponding to the image in the first display partition.

[0034] In this application, the processor obtains the backlight brightness corresponding to the image in the display partition through a preset regional backlight extraction algorithm, and then determines the backlight brightness gain corresponding to the image in the first display partition according to the backlight brightness after filtering, improving the efficiency of obtaining the backlight brightness gain.

[0035] In some embodiments of this application, the processor is further configured to:

[0036] For the first display partition, obtain the backlight brightness gain and the backlight brightness corresponding to the image in the first display partition;

[0037] Adjust the backlight brightness of the image in the first display partition according to the backlight brightness gain and the backlight brightness corresponding to the image in the first display partition.

[0038] In this application, the processor adjusts the backlight brightness according to the backlight brightness gain and the backlight brightness corresponding to the image in the first display partition, improving the accuracy of the backlight brightness of the image displayed in the first display partition.

[0039] In some embodiments of this application, the processor is further configured to:

[0040] For the second display partition, obtain the backlight brightness corresponding to the image in the second display partition;

[0041] Adjust the backlight brightness of the image in the second display partition according to the backlight brightness corresponding to the image in the second display partition.

[0042] In this application, the processor adjusts the backlight brightness according to the backlight brightness corresponding to the image in the second display partition, improving the accuracy of the backlight brightness of the image displayed in the second display partition.

[0043] In some embodiments of this application, when the processor is configured to determine the second full-screen white field brightness of the first display partition according to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white field brightness, it specifically includes:

[0044] Multiply the backlight brightness gain by the first full-screen white field brightness to determine the second full-screen white field brightness of the first display partition.

[0045] In the present application, the processor multiplies the backlight brightness gain by the first full-screen white field brightness to obtain the second full-screen white field brightness, which facilitates subsequent second brightness mapping processing based on the second full-screen white field brightness, making the second full-screen white field brightness for the second brightness mapping processing more accurate.

[0046] In some embodiments of the present application, when the processor is configured to perform second brightness mapping processing on the image in the first display partition according to the second full-screen white field brightness to obtain the image in the first display partition and its second brightness after processing, it specifically includes:

[0047] Based on the second full-screen white field brightness, perform second brightness mapping processing on the image in the first display partition based on a preset brightness mapping algorithm to obtain the image in the first display partition and its second brightness after processing.

[0048] In the present application, the processor performs second brightness mapping processing according to the second full-screen white field brightness, making the brightness display of the image in the first display partition clearer.

[0049] In a second aspect, an image brightness adjustment method for a display device provided by an embodiment of the present application includes:

[0050] The display screen displays images in multiple display partitions, and the display screen is divided into multiple display partitions;

[0051] The processor performs first brightness mapping processing on the images in multiple display partitions to obtain the images in multiple display partitions and their first brightness after processing;

[0052] The processor obtains the pixel grayscales of the images in multiple display partitions after processing;

[0053] The processor determines, according to the pixel grayscales, a first display partition in which the pixel grayscale exceeds the target pixel grayscale and a second display partition in which the pixel grayscale does not exceed the target pixel grayscale from multiple display partitions;

[0054] The processor performs second brightness mapping processing on the image in the first display partition to obtain the image in the first display partition and its second brightness after processing;

[0055] The processor performs fitting processing on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image;

[0056] The display screen displays an image corresponding to the target brightness according to the target brightness.

[0057] In this application, through performing a first brightness mapping process on the images in multiple display partitions, then obtaining the pixel grayscales of the images in each display partition after the process, for the images in the first display partition where the pixel grayscales exceed the target pixel grayscale, performing a second brightness mapping process to obtain the second brightness of the images in the first display partition after the process. And maintaining the first brightness of the images in the second display partition where the pixel grayscales do not exceed the target pixel grayscale, and then performing a fitting process on the second brightness of the images in the first display partition and the first brightness of the images in the second display partition to obtain the target brightness of the full-screen image. The method of this application neither makes the displayed images too bright nor makes the dark-field details of the displayed images too dark, improving the display effect of the images. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of this application or the implementation manners in related technologies, the following will briefly introduce the drawings required to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0059] Figure 1 A schematic diagram of adjusting the image brightness according to an existing technology provided by some embodiments of this application;

[0060] Figure 2 A schematic diagram of the hardware configuration of a display device provided by an embodiment of this application;

[0061] Figure 3 A schematic diagram of a display partition provided by some embodiments of this application;

[0062] Figure 4 A schematic flowchart of a method for determining the first display partition and the second display partition provided by some embodiments of this application;

[0063] Figure 5 A schematic flowchart of a method for performing a second brightness mapping process on the images in the first display partition provided by some embodiments of this application;

[0064] Figure 6 A schematic flowchart of a method for adjusting the image brightness of a display device provided by some embodiments of this application;

[0065] Figure 7 A schematic diagram of adjusting the image brightness provided by some embodiments of this application;

[0066] Figure 8 A schematic diagram of the result of brightness mapping according to the full-screen white-field brightness L1 provided by some embodiments of this application;

[0067] Figure 9 A schematic diagram of the result of brightness mapping according to the full-screen white-field brightness L1 and the full-screen white-field brightness L2 provided by some embodiments of the present application. Detailed implementation manners

[0068] To make the objectives, implementation manners, and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0069] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0070] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device including a series of components does not necessarily have to be limited to those clearly listed components, but may include other components not clearly listed or inherent to these products or devices.

[0071] With the rapid development of display technologies, more and more display devices are equipped with the functions of local dimming (LD) and peaking, so as to better adjust the high-dynamic range (HDR) image brightness of the display devices.

[0072] Taking a display device with LD and peaking functions as an example, currently, when adjusting the image brightness of the display device, tone mapping processing can be performed according to the fixed full-screen white-field brightness of the display device, as Figure 1 shown Figure 1 A schematic diagram of adjusting the image brightness in the prior art provided by some embodiments of the present application, including:

[0073] S101. The HDR brightness configuration module in the display device obtains the full-screen white-field brightness L1.

[0074] S102. The HDR brightness mapping module in the display device performs brightness mapping processing according to the full-screen white-field brightness L1 to obtain the processed image and its brightness.

[0075] S103. Adjust the color (RGB) brightness of the image in the display screen according to the brightness.

[0076] S104. The LD module in the display device obtains the backlight brightness values of the processed images in each display partition of the display screen and performs filtering processing on them. The filtering processing includes, but is not limited to, spatial filtering, BL gamma filtering, and temporal filtering, etc.

[0077] S105. The Peaking module in the display device determines the backlight brightness gain b according to the backlight brightness values of the images in each display partition and a preset gain look-up table gain LUT.

[0078] S106. The LED Backlight module of the display device adjusts the backlight brightness of the images in each display partition according to the backlight brightness values of the images in each display partition and the backlight brightness gain b.

[0079] However, the above adjustment method is likely to make the overall displayed HRD picture too bright, affecting the highlight level and detail performance of the picture.

[0080] Alternatively, brightness mapping processing can also be performed according to the peak brightness of the display device. However, this method is likely to make the overall displayed HRD picture too dark, affecting the dark field detail performance of the picture.

[0081] Therefore, in view of the above technical problems in the prior art, the inventor found in the process of adjusting the brightness of the image that the pixel gray level of the image will affect the display brightness. When the pixel gray level is lower than a certain pixel gray level, brightness mapping is performed through the full-screen white field brightness of the display device, which can meet the user's display brightness requirements for the image. When the pixel gray level is higher than a certain pixel gray level, by adjusting the Peaking gain of the image, that is, the backlight brightness gain, a new full-screen white field brightness is re-determined according to the backlight brightness gain and the full-screen white field brightness of the display device, and then brightness mapping is performed according to the new full-screen white field brightness, thereby also meeting the user's display brightness requirements for the image. Based on this, the present application proposes a display device and an image brightness adjustment method for the display device.

[0082] The following uses specific embodiments to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0083] Figure 2 The following is a schematic diagram of the hardware configuration of a display device provided by an embodiment of the present application. As Figure 2 shown, the display device includes: a display screen 201 and a processor 202.

[0084] Among them, the display screen 201 is divided into multiple display partitions 01, asFigure 3 As shown Figure 3 FIG. is a schematic diagram of a display partition provided by some embodiments of the present application. It can be understood that the number of display partitions in the present application is not limited and can be determined according to actual application scenarios and the like.

[0085] The connection relationship is: the display screen 201 is connected to the processor 202.

[0086] Its function is:

[0087] The display screen 201 is configured to: display images in multiple display partitions.

[0088] The processor 202 is configured to: perform a first brightness mapping process on the images in multiple display partitions to obtain the images and their first brightness in the multiple display partitions after processing.

[0089] In some embodiments, the processor 202 obtains the first full-screen white-field brightness of the display screen, and based on the first full-screen white-field brightness, performs a first brightness mapping process on the images in multiple display partitions of the display screen according to a preset brightness mapping algorithm to obtain the images and their first brightness in the multiple display partitions after processing.

[0090] In this embodiment, the first full-screen white-field brightness L1 of the display device has been measured by a luminance meter and written into the movement configuration file. Therefore, the processor 202 can directly obtain the first full-screen white-field brightness L1 from the movement configuration file.

[0091] When the display device plays an HDR source, the brightness information of the HDR source is mapped to the display screen through a brightness mapping algorithm, so that the display screen can normally display the image brightness effect of the HDR source. Among them, the HDR source is a source obtained by processing the absolute brightness data / bitstream of actual shooting through a coding curve that is more in line with the human visual sense, such as SMPTE ST 2084, and realizing the overall brightness mapping of the bitstream by mapping the maximum / minimum brightness of the bitstream to the maximum / minimum brightness of the actual screen.

[0092] The processor 202 is further configured to: obtain the pixel gray levels of the images in the multiple display partitions after processing, and determine a first display partition with pixel gray levels exceeding the target pixel gray level and a second display partition with pixel gray levels not exceeding the target pixel gray level from the multiple display partitions according to the pixel gray levels.

[0093] In some embodiments, the processor 202 extracts the corresponding pixel gray levels from the images of each display partition after the first brightness mapping process according to a preset pixel gray level extraction algorithm, and determines the first display partition and the second display partition from the multiple display partitions according to the magnitude relationship between the pixel gray levels and the target pixel gray level.

[0094] The specific implementation process will be described in detail in the following embodiments. Please refer to the following embodiments.

[0095] The processor 202 is further configured to perform a second brightness mapping process on the image in the first display partition to obtain the image in the first display partition after processing and its second brightness.

[0096] Since the pixel grayscale of the image in the first display partition is an image with a pixel grayscale exceeding the target pixel grayscale, if only the first full-screen white-field brightness L1 of the display device is used for the first brightness mapping process, the brightness display of this part of the image will be poor. Therefore, it is necessary to re-determine the full-screen white-field brightness L2 for performing the second brightness mapping process, and then perform brightness mapping according to the re-determined full-screen white-field brightness L2.

[0097] The processor 202 is further configured to perform a fitting process on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image.

[0098] The processor 202 superimposes and fits the second brightness TMO2 of the image in the first display partition and the first brightness TMO1 of the image in the second display partition to obtain the target brightness of the full-screen image. And based on this target brightness acting on the image pixels, the brightness distribution of the picture is adjusted, while enhancing the contrast between light and dark of the picture, ensuring the detail performance of the bright and dark parts of the picture.

[0099] The display screen 201 is further configured to display an image corresponding to the target brightness according to the target brightness.

[0100] In the above embodiments of the present application, the display device includes a display screen 201 and a processor 202 connected to the display screen 201. Among them, the display screen 201 is divided into multiple display partitions for displaying images in the multiple display partitions. The processor 202 is used to perform a first brightness mapping process on the images in the multiple display partitions to obtain the images in the multiple display partitions after processing and their first brightness, and to obtain the pixel grayscale of the processed images in the multiple display partitions. According to the pixel grayscale, the first display partition with a pixel grayscale exceeding the target pixel grayscale and the second display partition with a pixel grayscale not exceeding the target pixel grayscale are determined from the multiple display partitions. The processor 202 is further used to perform a second brightness mapping process on the image in the first display partition to obtain the image in the first display partition after processing and its second brightness, and to perform a fitting process on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image. Furthermore, the display screen 201 displays an image corresponding to the target brightness according to the target brightness. The display device of the present application enables the display of the image to be neither too bright nor too dark, improving the user's viewing experience.

[0101] Further, based on the above embodiments, the following embodiments illustrate the process in which the processor is configured to determine, according to the pixel gray level, a first display partition in which the pixel gray level exceeds the target pixel gray level and a second display partition in which the pixel gray level does not exceed the target pixel gray level from multiple display partitions.

[0102] Figure 4 As shown in the flowchart of a method for determining a first display partition and a second display partition provided by some embodiments of the present application, Figure 4 as shown, the processor is specifically configured to perform the following steps:

[0103] S401. Determine the target pixel gray level corresponding to the first full-screen white field brightness according to the mapping relationship between the pixel gray level and the full-screen white field brightness in the preset high dynamic range imaging (HDR).

[0104] In this embodiment, a mapping relationship between the pixel gray level and the full-screen white field brightness in the preset high dynamic range imaging (HDR) is provided. For example, the mapping relationship can be as shown in the high dynamic range imaging electro-optical transfer function table (HDR EOTF LUT), i.e., Table 1:

[0105] Table 1

[0106]

[0107]

[0108] Assume that the first full-screen white field brightness L1 is 600 nit. According to Table 1, the target pixel gray level a corresponding to L1 can be determined as "704".

[0109] S402. From multiple display partitions, determine, as the first display partition, the display partition in which the pixel gray level of the image in the display partition exceeds the target pixel gray level.

[0110] The processor determines, as the first display partition, the display partition in which the pixel gray level is greater than the target pixel gray level a.

[0111] S403. From multiple display partitions, determine, as the second display partition, the display partition in which the pixel gray level of the image in the display partition does not exceed the target pixel gray level.

[0112] The processor determines, as the second display partition, the display partition in which the pixel gray level is less than or equal to the target pixel gray level a.

[0113] In the above embodiments of the present application, the first display partition and the second display partition determined by the processor according to the magnitude relationship between the pixel gray level of the image in each display partition and the target pixel gray level are more accurate.

[0114] Further, based on the above embodiments, the following embodiments illustrate the process in which the processor is configured to perform second brightness mapping processing on the image in the first display partition to obtain the image in the processed first display partition and its second brightness.

[0115] Figure 5 A flowchart of a method for performing second brightness mapping processing on an image in a first display partition provided by some embodiments of the present application is shown in Figure 5 as follows. The processor is specifically configured to perform the following steps:

[0116] S501. Obtain the backlight brightness gain corresponding to the image in the first display partition.

[0117] A possible implementation is:

[0118] Based on a preset regional backlight extraction algorithm, extract the backlight brightness corresponding to the images in multiple processed display partitions, where the display partitions include a first display partition and a second display partition. Perform filtering processing on the backlight brightness corresponding to the images in multiple processed display partitions to obtain the filtered backlight brightness, perform mean calculation on the filtered backlight brightness to obtain the average backlight brightness, and then determine the backlight brightness gain corresponding to the average backlight brightness according to the mapping relationship between the preset average backlight brightness and the backlight brightness gain.

[0119] It should be noted that at this time, the backlight brightness gain b is both the backlight brightness gain corresponding to the image in the first display partition and the backlight brightness gain corresponding to the image in the first display partition.

[0120] S502. Determine the second full-screen white field brightness of the first display partition according to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white field brightness.

[0121] If the pixel grayscale of the image in the first display partition is greater than the target pixel grayscale, multiply the backlight brightness gain b corresponding to the image in the first display partition by the first full-screen white field brightness L1 to obtain the second full-screen white field brightness L2.

[0122] S503. Perform second brightness mapping processing on the image in the first display partition according to the second full-screen white field brightness to obtain the image in the processed first display partition and its second brightness.

[0123] The processor performs second brightness mapping processing on the image in the first display partition based on the second full-screen white field brightness L2 according to a preset brightness mapping algorithm to obtain the image in the processed first display partition and its second brightness.

[0124] In the above embodiments of the present application, the processor obtains the backlight brightness gain corresponding to the image in the first display partition, and determines the second full-screen white-field brightness of the first display partition according to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white-field brightness. Furthermore, according to the second full-screen white-field brightness, the processor performs a second brightness mapping process on the image in the first display partition to obtain the processed image in the first display partition and its second brightness, such that the brightness of the image in the first display partition is neither too bright nor too dark, and more meets the viewing needs of users.

[0125] In some embodiments of the present application, the processor is further configured to: for the first display partition, as shown in step S501, obtain the backlight brightness gain and backlight brightness corresponding to the image in the first display partition, and adjust the backlight brightness of the image in the first display partition according to the backlight brightness gain and backlight brightness corresponding to the image in the first display partition. For the second display partition, obtain the backlight brightness corresponding to the image in the second display partition, and adjust the backlight brightness of the image in the second display partition only according to the backlight brightness corresponding to the image in the second display partition.

[0126] The present application also provides an image brightness adjustment method for a display device, as Figure 6 shown Figure 6 is a schematic flowchart of an image brightness adjustment method for a display device provided in some embodiments of the present application, as Figure 6 shown, and the method may include the following steps:

[0127] S601. The display screen displays images in multiple display partitions, and the display screen is divided into multiple display partitions.

[0128] S602. The processor performs a first brightness mapping process on the images in the multiple display partitions to obtain the processed images in the multiple display partitions and their first brightness.

[0129] S603. The processor obtains the pixel grayscales of the processed images in the multiple display partitions.

[0130] S604. The processor determines, from the multiple display partitions, a first display partition whose pixel grayscale exceeds the target pixel grayscale and a second display partition whose pixel grayscale does not exceed the target pixel grayscale according to the pixel grayscales.

[0131] S605. The processor performs a second brightness mapping process on the image in the first display partition to obtain the processed image in the first display partition and its second brightness.

[0132] S606. The processor performs a fitting process on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image.

[0133] S607. The display screen displays an image corresponding to the target brightness according to the target brightness.

[0134] In the above embodiments of the present application, for the specific implementation steps and technical effects, please refer to the above embodiments. To avoid redundancy, they will not be repeated in this embodiment.

[0135] To facilitate a complete understanding of the present application, hereinafter, the method of the present application will be briefly described by means of the following examples. Figure 7 A schematic diagram for adjusting the image brightness provided by some embodiments of the present application is as follows Figure 7 shown, including:

[0136] S701. The HDR brightness configuration module in the display device obtains the full-screen white-field brightness L1.

[0137] S702. The HDR EOFT LUT module in the display device determines the target pixel gray level a corresponding to the first full-screen white-field brightness L1 according to the mapping relationship between the pixel gray level and the full-screen white-field brightness in the preset high dynamic range imaging (HDR).

[0138] S703. The first HDR brightness mapping module in the display device performs brightness mapping processing according to the full-screen white-field brightness L1 to obtain the processed image and its first brightness, denoted as TMO1.

[0139] S704. The LD module in the display device obtains the backlight brightness value of the processed image in each display partition of the display screen and performs filtering processing on it. The filtering processing includes, but is not limited to, spatial filtering, BL gamma filtering, and temporal filtering, etc.

[0140] S705. The Peaking module in the display device determines the backlight brightness gain b according to the backlight brightness value of the image in each display partition and the preset gain look-up table (gain LUT). And according to the size relationship between the pixel gray level of the image in each display partition and the target pixel gray level a, the backlight brightness gain of the display partition to be adjusted is determined.

[0141] S706. The Peaking module in the display device determines whether the pixel gray level of the image in each display partition does not exceed the target pixel gray level a.

[0142] S707. For the display partition where the pixel gray level of the image does not exceed the target pixel gray level a, the backlight brightness gain is not considered, and the backlight brightness value corresponding to the image in the display partition is obtained.

[0143] S708. Adjust the backlight brightness of the image in the display partition according to the backlight brightness value.

[0144] S709. For a display partition where the pixel grayscale of an image exceeds the target pixel grayscale a, obtain the backlight brightness gain b and the backlight brightness value corresponding to the image in the display partition, and adjust the backlight brightness of the image in the display partition according to the backlight brightness gain b and the backlight brightness value.

[0145] S710. For a display partition where the pixel grayscale of an image exceeds the target pixel grayscale a in the display device, the HDR brightness second mapping module calculates the second full-screen white-field brightness L2 (L2 = L1 * b) according to the backlight brightness gain b corresponding to the image in the display partition and the first full-screen white-field brightness L1, and then performs a second brightness mapping process on the image in the display partition according to the second full-screen white-field brightness, obtaining the image and its second brightness in the processed display partition, denoted as TMO2.

[0146] S711. The brightness fitting module in the display device fits TMO1 and TMO2 to obtain the target brightness TMO.

[0147] S712. And adjust the color (RGB) brightness of the image on the display screen according to the target brightness TMO.

[0148] For the specific implementation steps and technical effects in the above example, please refer to the above-mentioned multiple embodiments and will not be repeated here.

[0149] It should be noted that the division of the above Figure 7 indicated modules is only for illustration. The present application does not limit the division of each module, as well as the naming of each module. In addition, the present application does not limit the execution sequence of the above steps.

[0150] Compared with the existing traditional method of only performing brightness mapping according to the fixed full-screen white-field brightness L1, the brightness display effect of the image in the method of the present application is significantly improved. Figure 8 This is a schematic diagram of the result of brightness mapping according to the full-screen white-field brightness L1 provided by some embodiments of the present application. Figure 9 This is a schematic diagram of the result of brightness mapping according to the full-screen white-field brightness L1 and the full-screen white-field brightness L2 provided by some embodiments of the present application. Through Figure 8 and Figure 9 it can be seen that through the present application, the image brightness can be increased from the existing approximately 700 nit brightness to 1800 nit brightness, with a wider adjustable brightness range, reducing the situation of image overexposure, and a wider adjustable pixel grayscale range, from the existing approximately 60 pixel grayscale to 80, thereby making the brightness details and dark-field details of the image clearer.

[0151] The present application also provides a computer-readable storage medium, which may include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs. Specifically, program instructions are stored in the computer-readable storage medium, and the program instructions are used for the image brightness adjustment method of the display device in the above embodiments.

[0152] The present application also provides a program product, which includes execution instructions stored in a readable storage medium. At least one control module of the display device can read the execution instructions from the readable storage medium, and the execution of the execution instructions by at least one control module causes the display device to implement the image brightness adjustment method of the display device provided by the above various embodiments.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

[0154] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, The display device includes: a display screen, which is divided into multiple display partitions; The display screen is configured to: display images in multiple of the display partitions; A processor connected to the display screen, the processor is configured to: perform a first brightness mapping process on the images in multiple of the display partitions to obtain the processed images in multiple of the display partitions and their first brightness; Obtain the pixel grayscale of the processed images in multiple of the display partitions; According to the pixel grayscale, determine a first display partition in which the pixel grayscale exceeds a target pixel grayscale and a second display partition in which the pixel grayscale does not exceed the target pixel grayscale from multiple of the display partitions; Perform a second brightness mapping process on the images in the first display partition to obtain the processed images in the first display partition and their second brightness; Perform a fitting process on the second brightness of the images in the first display partition and the first brightness of the images in the second display partition to obtain the target brightness of the full-screen image; The display screen is further configured to: display an image corresponding to the target brightness according to the target brightness.

2. The display device according to claim 1, wherein When the processor is configured to perform a first brightness mapping process on the images in multiple of the display partitions to obtain the processed images in multiple of the display partitions and their first brightness, it specifically includes: Obtain the first full-screen white-field brightness of the display screen; According to the first full-screen white-field brightness, perform a first brightness mapping process on the images in multiple of the display partitions in the display screen based on a preset brightness mapping algorithm to obtain the processed images in multiple of the display partitions and their first brightness.

3. The display device according to claim 2, wherein When the processor is configured to determine a first display partition in which the pixel grayscale exceeds a target pixel grayscale and a second display partition in which the pixel grayscale does not exceed the target pixel grayscale from multiple of the display partitions according to the pixel grayscale, it specifically includes: Determine the target pixel grayscale corresponding to the first full-screen white-field brightness according to the mapping relationship between the pixel grayscale and the full-screen white-field brightness in the preset high dynamic range imaging (HDR); From multiple of the display partitions, determine the display partition in which the pixel grayscale of the image in the display partition exceeds the target pixel grayscale as the first display partition; From multiple of the display partitions, determine the display partition in which the pixel grayscale of the image in the display partition does not exceed the target pixel grayscale as the second display partition.

4. The display device according to claim 3, wherein When the processor is configured to perform a second brightness mapping process on the images in the first display partition to obtain the processed images in the first display partition and their second brightness, it specifically includes: Obtain the backlight brightness gain corresponding to the image in the first display partition; Determine the second full-screen white-field brightness of the first display partition according to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white-field brightness; According to the second full-screen white-field brightness, perform a second brightness mapping process on the images in the first display partition to obtain the processed images in the first display partition and their second brightness.

5. The display device according to claim 4, wherein, When the processor is configured to obtain the backlight brightness gain corresponding to the image in the first display partition, it specifically includes: Based on a preset regional backlight extraction algorithm, extract the backlight brightness corresponding to the images in multiple processed display partitions, where the display partitions include the first display partition and the second display partition; Perform filtering processing on the backlight brightness corresponding to the images in multiple processed display partitions to obtain the filtered backlight brightness; Calculate the average value of the filtered backlight brightness to obtain the average backlight brightness; According to the preset mapping relationship between the average backlight brightness and the backlight brightness gain, determine the backlight brightness gain corresponding to the average backlight brightness, where the backlight brightness gain is the backlight brightness gain corresponding to the image in the first display partition.

6. The display device according to claim 5, wherein The processor is further configured to: For the first display partition, obtain the backlight brightness gain and the backlight brightness corresponding to the image in the first display partition; Adjust the backlight brightness of the image in the first display partition according to the backlight brightness gain and the backlight brightness corresponding to the image in the first display partition.

7. The display device according to claim 5, wherein The processor is further configured to: For the second display partition, obtain the backlight brightness corresponding to the image in the second display partition; Adjust the backlight brightness of the image in the second display partition according to the backlight brightness corresponding to the image in the second display partition.

8. The display device according to claim 4, characterized in that When the processor is configured to determine the second full-screen white-field brightness of the first display partition according to the backlight brightness gain corresponding to the image in the first display partition and the first full-screen white-field brightness, it specifically includes: Multiply the backlight brightness gain by the first full-screen white-field brightness to determine the second full-screen white-field brightness of the first display partition.

9. The display device according to claim 8, wherein When the processor is configured to perform a second brightness mapping process on the image in the first display partition according to the second full-screen white-field brightness to obtain the processed image and its second brightness in the first display partition, it specifically includes: Based on the second full-screen white-field brightness, perform a second brightness mapping process on the image in the first display partition according to a preset brightness mapping algorithm to obtain the processed image and its second brightness in the first display partition.

10. A method for adjusting the image brightness of a display device, characterized in that, The method includes: The display screen displays the images in multiple display partitions, and the display screen is divided into multiple display partitions; The processor performs a first brightness mapping process on the images in multiple display partitions to obtain the processed images and their first brightness in multiple display partitions; The processor obtains the pixel grayscale of the processed images in multiple display partitions; The processor determines, from multiple display partitions, a first display partition whose pixel grayscale exceeds the target pixel grayscale and a second display partition whose pixel grayscale does not exceed the target pixel grayscale according to the pixel grayscale; The processor performs a second brightness mapping process on the image in the first display partition to obtain the processed image and its second brightness in the first display partition; The processor performs a fitting process on the second brightness of the image in the first display partition and the first brightness of the image in the second display partition to obtain the target brightness of the full-screen image; The display screen displays an image corresponding to the target brightness according to the target brightness.

Images