Display device and backlight adjusting method

Abstract

The invention relates to display equipment and a backlight adjusting method, and relates to the technical field of display equipment. The display apparatus includes a display, a backlight assembly, and a controller. Wherein the backlight assembly comprises a plurality of backlight subareas, and each backlight subarea comprises a light condensation type backlight source and a light diffusion type backlight source; the controller is respectively coupled with the display and the backlight assembly, and is configured to perform division processing on an image to be displayed of the display to obtain a partition image corresponding to each backlight partition; according to the image content of the partition image corresponding to each backlight partition, obtaining light pattern information currently required by each backlight partition; the light pattern information is used for representing the light gathering and scattering degree; and according to the light pattern information currently required by each backlight subarea, adjusting the luminance of the light-condensing backlight source and the light-diffusing backlight source in each backlight subarea. The image display effect of the display equipment can be improved.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display device and a backlight adjustment method. Background Technology

[0002] Smart TVs and other display devices typically consist of two main parts: a backlight system and a display. The backlight system provides a light source for the display to show digital images.

[0003] In traditional technology, the light pattern information of the backlight system of a display device is usually fixed. That is, the brightness provided by the backlight system remains consistent regardless of the digital image being displayed. This makes the display device prone to haloing, resulting in poor image display quality.

[0004] Therefore, traditional technologies suffer from the technical problem of poor image display quality in display devices. Summary of the Invention

[0005] This application provides a display device and a backlight adjustment method to solve the technical problem of poor image display effect of the display device.

[0006] In a first aspect, some embodiments provide a display device, including: a display, a backlight assembly, and a controller. The backlight assembly includes a plurality of backlight zones, each backlight zone including a focusing backlight source and a diffusing backlight source; the controller is coupled to both the display and the backlight assembly, and is configured to:

[0007] The image to be displayed on the display is divided into partitions to obtain partition images corresponding to each backlight partition;

[0008] Based on the image content of the partition image corresponding to each backlight partition, the light pattern information currently required for each backlight partition is obtained; the light pattern information is used to characterize the degree of light convergence and divergence.

[0009] Based on the light pattern information currently required for each backlight zone, adjust the luminous brightness of the focused backlight and the diffused backlight in each backlight zone.

[0010] Technical Effect: First, the image to be displayed on the monitor is divided into partitions to obtain partition images corresponding to each backlight zone. Then, based on the image content of each partition image, the light pattern information required for each backlight zone is obtained. Finally, based on the light pattern information required for each backlight zone, the luminous brightness of the focused backlight and diffused backlight in each backlight zone is adjusted. In this way, based on the image content of the partition image corresponding to each backlight zone, the light pattern required for each backlight zone is dynamically determined, and based on the light pattern required for each backlight zone, the luminous brightness of the focused backlight and diffused backlight in each backlight zone is adaptively adjusted. This ensures that the focused and diffused brightness provided by each backlight zone matches the image content of that backlight zone, thereby reducing halo phenomena and improving the image display effect of the display device. At the same time, it avoids the defect of traditional technology where the brightness provided by the backlight system is consistent, which makes the display device prone to halo phenomena and thus leads to poor image display effect.

[0011] In some embodiments of this application, the controller is further configured to:

[0012] The partition image corresponding to each backlight partition is further divided to obtain multiple sub-partition images corresponding to each backlight partition.

[0013] Based on the image content of each sub-zone image corresponding to each backlight zone and the zone image corresponding to each backlight zone, the brightness ratio of each sub-zone image corresponding to each backlight zone to the zone image corresponding to each backlight zone is obtained.

[0014] Based on the brightness ratio of each sub-zone image corresponding to each backlight zone to the total brightness of the corresponding zone image, the light pattern information currently required for each backlight zone is determined.

[0015] Technical effect: When determining the light pattern information required for each backlight zone, the brightness ratio of each sub-zone image corresponding to each backlight zone to the corresponding zone image of each backlight zone is comprehensively considered. This can effectively determine the brightness of the image content of the zone image corresponding to each backlight zone, so that the final determined light pattern information required for each backlight zone matches the brightness of the image content of the zone image corresponding to each backlight zone, thereby improving the accuracy of determining the light pattern information required for each backlight zone.

[0016] In some embodiments of this application, the controller is further configured to:

[0017] Obtain the size information of the backlight partition and the resolution information of the display;

[0018] Based on the size information and the resolution information, determine the number of sub-partition images corresponding to each backlight partition;

[0019] Based on the number of sub-partition images, the partition images corresponding to each backlight partition are further divided to obtain multiple sub-partition images corresponding to each backlight partition.

[0020] Technical effect: By comprehensively considering the size information of the backlight zones and the resolution information of the display, the number of sub-zone images corresponding to each backlight zone is determined, and the zone images corresponding to each backlight zone are further divided based on this. This can effectively provide reference information for the further division of zone images, thereby making the number of sub-zone images more accurate. It avoids the defect of having too many or too few sub-zone images, which would affect the determination of subsequent light pattern information and lead to a low accuracy in determining the light pattern information required for each backlight zone.

[0021] In some embodiments of this application, the controller is further configured to:

[0022] The pixel values ​​of sub-region pixels in each sub-region image corresponding to each backlight zone are determined, and the pixel values ​​of partition pixels in the partition image corresponding to each backlight zone are determined; the pixel values ​​are used to characterize brightness information.

[0023] The pixel values ​​of the sub-partition pixels in each sub-partition image corresponding to each backlight partition are added together to obtain the brightness of each sub-partition image corresponding to each backlight partition, and the pixel values ​​of the partition pixels in each partition image corresponding to each backlight partition are added together to obtain the brightness of the partition image corresponding to each backlight partition.

[0024] Based on the brightness of each sub-region image corresponding to each backlight zone and the brightness of the zone image corresponding to each backlight zone, the brightness ratio of each sub-region image corresponding to each backlight zone to the brightness ratio of the zone image corresponding to each backlight zone is obtained.

[0025] Technical effect: By summing the pixel values ​​of the sub-region pixels in the sub-region images corresponding to each backlight zone, the brightness of each sub-region image corresponding to each backlight zone is determined. Similarly, by summing the pixel values ​​of the sub-region pixels in the sub-region images corresponding to each backlight zone, the brightness of the sub-region images corresponding to each backlight zone is determined. This improves the accuracy of determining the brightness of each sub-region image and the sub-region image corresponding to each backlight zone, resulting in a more accurate determination of the brightness ratio.

[0026] In some embodiments of this application, the controller is further configured to:

[0027] According to the brightness ratio from high to low, the brightness ratio of each sub-partition image corresponding to each backlight partition is sorted according to the brightness ratio of each partition image corresponding to each backlight partition, so as to obtain the sorted brightness ratio of each backlight partition.

[0028] From the sorted brightness ratios corresponding to each backlight zone, select the first preset number of brightness ratios, and add the first preset number of brightness ratios together to obtain the target brightness ratio corresponding to each backlight zone.

[0029] Based on the target brightness ratio corresponding to each backlight zone, determine the light pattern information currently required for each backlight zone.

[0030] Technical effect: When determining the light pattern information required for each backlight zone, by comprehensively considering the sum of the first preset number of brightness ratios in the sorted brightness ratios corresponding to each backlight zone, the brightness of the image content of each backlight zone can be accurately determined, which is conducive to accurately determining the light pattern information required for each backlight zone.

[0031] In some embodiments of this application, the controller is further configured to:

[0032] The controller is also configured to:

[0033] If the target brightness ratio corresponding to the backlight partition is greater than a first preset threshold, the light pattern information currently required by the backlight partition is determined to be the first light pattern information.

[0034] or,

[0035] If the target brightness ratio corresponding to the backlight zone is less than the second preset threshold, the light pattern information currently required by the backlight zone is determined to be the second light pattern information.

[0036] or,

[0037] When the target brightness ratio corresponding to the backlight partition is less than or equal to the first preset threshold and the target brightness ratio corresponding to the backlight partition is greater than or equal to the second preset threshold, the light pattern information corresponding to the target brightness ratio is obtained as the light pattern information currently needed by the backlight partition.

[0038] Wherein, the value corresponding to the first light pattern information is greater than the value corresponding to the second light pattern information, and the value of the light pattern information corresponding to the target brightness ratio is less than the value corresponding to the first light pattern information but greater than the value corresponding to the second light pattern information.

[0039] Technical effect: When determining the light pattern information required for each backlight zone, the comparison between the target brightness ratio of each backlight zone and the first preset threshold and the second preset threshold is comprehensively considered and determined in three cases. This makes the final determined light pattern information more accurate, thereby improving the accuracy of determining the light pattern information required for each backlight zone. This facilitates accurate dimming based on the light pattern information in the future, which in turn helps to further improve the image display effect of the display device.

[0040] In some embodiments of this application, the controller is further configured to:

[0041] Based on the target brightness ratio corresponding to the backlight partition, the correspondence between the brightness ratio and the light pattern information is queried to obtain the light pattern information corresponding to the target brightness ratio.

[0042] Technical effect: When determining the light pattern information corresponding to the target brightness ratio, it is based on the target brightness ratio corresponding to the backlight partition and the correspondence between the brightness ratio and the light pattern information is obtained by querying the correspondence between the brightness ratio and the light pattern information. There is no need to obtain the light pattern information corresponding to the target brightness ratio through complex calculations, which helps to save the determination time of the light pattern information corresponding to the target brightness ratio, thereby improving the determination efficiency of the light pattern information corresponding to the target brightness ratio.

[0043] In some embodiments of this application, the controller is further configured to:

[0044] Based on the light pattern information currently required for each backlight zone, the correspondence between the light pattern information and the light emission information of the focused backlight and the light emission information of the diffused backlight is queried to obtain the light emission information of the focused backlight and the diffused backlight in each backlight zone.

[0045] Based on the luminous information of the focused backlight and the diffused backlight in each backlight zone, the luminous brightness of the focused backlight and the diffused backlight in each backlight zone is adjusted.

[0046] Technical effect: By establishing the correspondence between light pattern information and the luminous information of the focused backlight and the diffused backlight, the light pattern information currently required by each backlight zone is converted into the luminous information of the focused backlight and diffused backlight in each backlight zone. Based on the luminous information of the focused backlight and diffused backlight in each backlight zone, the luminous brightness of the focused backlight and diffused backlight in each backlight zone is adjusted. In other words, adjusting the luminous brightness of the focused backlight and diffused backlight in each backlight zone through the form of luminous information is beneficial for more accurate adjustment of the luminous brightness of the focused backlight and diffused backlight in each backlight zone.

[0047] In some embodiments of this application, the number of focusing backlights and the number of diffused backlights in each backlight zone are the same.

[0048] Technical effect: By setting the same number of focused and diffused backlights in each backlight zone, the focused and diffused brightness in each backlight zone can be effectively controlled during subsequent backlight dimming. That is, each backlight zone can provide both the corresponding focused and diffused brightness, so that the focused and diffused brightness provided by each backlight zone are adapted to the image content of that backlight zone, thereby improving the image display effect of the display device.

[0049] Secondly, some embodiments also provide a backlight adjustment method applied to a display device, the display device including a display, a backlight assembly, and a controller; the controller is coupled to the display and the backlight assembly respectively; the backlight assembly includes a plurality of backlight zones, each backlight zone including a focusing backlight source and a diffusing backlight source; the method includes:

[0050] The image to be displayed on the display is divided into partitions to obtain partition images corresponding to each backlight partition;

[0051] Based on the image content of the partition image corresponding to each backlight partition, the light pattern information currently required for each backlight partition is obtained; the light pattern information is used to characterize the degree of light convergence and divergence.

[0052] Based on the light pattern information currently required for each backlight zone, adjust the luminous brightness of the focused backlight and the diffused backlight in each backlight zone.

[0053] Technical effect: Based on the image content of the corresponding partition image of each backlight partition, the required light pattern of each backlight partition is dynamically determined. Based on the required light pattern of each backlight partition, the luminous brightness of the focusing backlight and the diffused backlight in each backlight partition is adaptively adjusted so that the focusing brightness and diffused brightness provided by each backlight partition are adapted to the image content of that backlight partition. This reduces the halo phenomenon and improves the image display effect of the display device. At the same time, it avoids the defect of the traditional technology where the brightness provided by the backlight system is consistent, which makes the display device prone to halo phenomenon and thus the poor image display effect of the display device. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the driver architecture of a display device provided in some embodiments of this application;

[0056] Figure 2 A schematic flowchart illustrating a backlight adjustment method provided in some embodiments of this application;

[0057] Figure 3 Signaling interaction diagrams for a backlight adjustment method for a display device provided in some embodiments of this application;

[0058] Figure 4 A schematic flowchart illustrating a television local dimming method based on backlight zoning provided in some embodiments of this application;

[0059] Figure 5 This is a structural block diagram of a backlight adjustment device provided in some embodiments of this application. Detailed Implementation

[0060] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0061] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0062] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0063] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0064] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0065] In this application embodiment, "display device" generally refers to a device with screen display and data processing capabilities. For example, display devices include, but are not limited to, smart TVs, mobile terminals, computers, monitors, advertising screens, wearable devices, virtual reality devices, and augmented reality devices. Furthermore, display devices can provide broadcast television reception functions and may also include, additionally, smart network TV functions with computer support, including but not limited to, network TV, smart TVs, and Internet Protocol TV (IPTV).

[0066] Figure 1 This is a schematic diagram of the driver architecture of a display device provided in some embodiments of this application. For example... Figure 1 As shown, the driving architecture of the display device includes a receiving device 110, a controller 120, a driving device 130, a display 140, and a backlight assembly 150. The controller 120 is coupled to both the receiving device 110 and the driving device 130; the driving device 130 is also coupled to the backlight assembly 150, and the receiving device 110 is also coupled to the display 150. It should be noted that... Figure 1 In this case, the controller 120 can also be coupled to the display 140.

[0067] In some embodiments, receiving device 110 refers to a component, such as a receiver, for receiving and parsing source signals (e.g., video and audio streams) emitted by a digital player, wired / wireless digital channels, etc. For example, receiving device 110 is used to parse the received video stream to obtain an image to be displayed on display 140, and send the image to be displayed to controller 120 and display 140. Of course, receiving device 110 may also only send the image to be displayed to controller 120, where controller 120 processes the image (e.g., image compensation processing) before sending it to display 140 for display.

[0068] In some embodiments, the controller 120 may include at least one of a central processing unit, a video processor, an audio processor, a graphics processor, and a power processor, and provide a first to an nth interface for input / output. The controller 120 controls the operation of the display device and responds to user operations through various software control programs stored in a memory. The controller 120 controls the overall operation of the display device. Furthermore, the controller 120 can also process images and audio. For example, the controller 120 processes the image to be displayed sent by the receiving device 110 to obtain a partition image corresponding to each backlight partition. Based on the image content of the partition image corresponding to each backlight partition, the controller obtains the light pattern information currently required for each backlight partition (used to characterize the degree of convergence and divergence). Based on the light pattern information currently required for each backlight partition, the controller determines the luminous information (e.g., target light intensity) of the convergent backlight and the diffuse backlight in each backlight partition, and sends the luminous information of the convergent backlight and the diffuse backlight in each backlight partition to the driving device 130.

[0069] In some embodiments, the driving device 130 refers to a component, such as an LED (Light Emitting Diode) driver, used to convert the light emission information of the backlight source (e.g., a focused backlight source and a diffused backlight source) in each backlight zone into a backlight driving signal for each backlight zone, and to adjust the light emission brightness of the backlight source in each backlight zone according to the backlight driving signal of each backlight zone. For example, the driving device 130 is used to convert the light emission information of the focused backlight source and the diffused backlight source in each backlight zone into a backlight driving signal for each backlight zone, and to send the backlight driving signal of each backlight zone to the backlight assembly 150 to adjust the light emission brightness of the focused backlight source and the diffused backlight source in each backlight zone of the backlight assembly 150.

[0070] In some embodiments, the display 140 includes display function components for presenting an image and driving components for driving the image display. The display 140 can be used to display video content, image content, menu control interface components, etc. For example, the display 140 is used to receive and display an image to be displayed sent by the receiving device 110. For example, the display 140 is used to receive and display an image signal (such as a compensated image to be displayed) output from the controller 120.

[0071] In some embodiments, the backlight assembly 150 refers to an assembly comprising multiple backlight zones, each backlight zone including a focusing backlight source and a diffuser backlight source, such as a multi-type backlight module. For example, under the drive of a backlight drive signal sent by the driving device 130 for each backlight zone, the focusing backlight source and the diffuser backlight source in each backlight zone of the backlight assembly 150 can adjust their respective current brightness to the corresponding luminous brightness. In some embodiments, such as Figure 1 As shown, this application provides a display device, which may include a display 140, a backlight assembly 150, and a controller 120; wherein, the backlight assembly 150 includes a plurality of backlight zones, each backlight zone including a focusing backlight and a diffusing backlight; the controller 120 is coupled to the display 140 and the backlight assembly 150 respectively.

[0072] like Figure 2 As shown, controller 120 is configured as follows:

[0073] Step S201: Divide the image to be displayed on the display 140 to obtain the partition image corresponding to each backlight partition.

[0074] Step S202: Based on the image content of the partition image corresponding to each backlight partition, obtain the light pattern information currently required for each backlight partition; the light pattern information is used to characterize the degree of convergence and divergence.

[0075] Step S203: Adjust the luminous brightness of the focused backlight and diffused backlight in each backlight zone according to the light pattern information required by each backlight zone.

[0076] Among them, Figure 1 In this case, the controller 120 is specifically connected to the backlight assembly 150 via the drive device 130.

[0077] Each backlight zone in the backlight assembly 150 includes a focused backlight source and a diffused backlight source, and the number and proportion of focused and diffused backlight sources in each backlight zone can be adjusted according to the actual backlight effect.

[0078] It's important to note that since display backlighting is typically provided by LEDs (Light Emitting Diodes), and the layout and type of LEDs can affect display quality, setting both focused and diffused backlights in each backlight zone effectively switches between focused and diffused lighting to suit the image content of each zone, thus improving the display's image quality. In contrast, traditional technology uniformly illuminates the entire 140° screen, meaning that even if a portion of the screen should display black or dark colors, the backlight still illuminates that area, resulting in insufficient black depth, reduced contrast, and ultimately, a lower image quality.

[0079] Both focused backlights and diffused backlights are types of backlight LEDs. A focused backlight refers to a spotlight, specifically a focused backlight LED; a diffused backlight refers to a diffused backlight, specifically a diffused backlight LED. Focused backlights concentrate the light emitted from a single point, increasing light intensity and directionality, resulting in a sharper and clearer image. Diffuse backlights disperse light in all directions, increasing light coverage and creating a more uniform image. The main difference between focused and diffused backlights lies in their beam angle; focused backlights have a smaller beam angle, concentrating the light over a smaller area, while diffused backlights have a larger beam angle, distributing the light over a larger area.

[0080] It should be noted that halo phenomena are usually caused by the scattering or reflection of light during its propagation. When light enters another medium from one medium, if the refractive indices of the two media are different, the light will refract, and some of the light may be scattered, forming a halo. Focused backlight LEDs, due to their small beam angle and concentrated light, have a relatively low possibility of scattering, thus reducing the halo phenomenon. On the other hand, diffused backlight LEDs, due to their large beam angle and dispersed light, have a relatively high possibility of scattering, thus making them more prone to halo phenomena.

[0081] The image to be displayed can be of various types, and this application does not impose any specific restrictions.

[0082] The process of dividing the image to be displayed on the monitor 140 refers to dividing the image to be displayed according to the number of backlight partitions; for example, if the number of backlight partitions is 10, then the image to be displayed will be divided into 10 partition images.

[0083] Each backlight zone corresponds to a zone image, and each zone image is the same size; a zone image refers to a portion of the image to be displayed.

[0084] The brightness of the image content in the partition image corresponding to each backlight partition can reflect the partition type of that backlight partition. If the image content of the partition image corresponding to a backlight partition is high-brightness content, then the backlight partition is a brightness-concentrated partition, which requires a focused backlight to provide stronger light. If the image content of the partition image corresponding to a backlight partition is low-brightness content, then the backlight partition is a brightness-dispersed partition, which requires a diffused backlight to achieve a diffused light effect.

[0085] The light pattern information is used to characterize the beam angle of the light source, specifically the beam angle of the backlight LED. This light pattern information is adjustable, indicating that the beam angle of the backlight LED can vary, thus enabling the transition between focused and diffused light, and the transition is gradual and smooth. In practical scenarios, the light pattern information refers to the light pattern value. A light pattern value of 100 to 0 represents the change in the backlight LED beam angle from focused to diffused light; that is, 100 represents focused light, and 0 represents diffused light. Values ​​between 100 and 0 represent a smooth transition from focused to diffused light. It should be noted that since the beam angle of the light source reflects the degree of focused and diffused light—for example, a smaller beam angle indicates more focused light and less diffused light, while a larger beam angle indicates less focused light and more diffused light—the light pattern information can also be used to characterize the degree of focused and diffused light.

[0086] The light pattern information required for each backlight zone is determined based on the brightness of the image content of the corresponding zone image. Specifically, it indicates whether each backlight zone needs focused or diffused light, i.e., the degree of focused or diffused light required for each backlight zone. If the image content of a zone image corresponding to a backlight zone is high-brightness content, it means that the backlight zone currently needs focused light (i.e., the light pattern information required for the backlight zone is focused light). In this case, more focused backlight LEDs in the backlight zone will emit light, while fewer diffused backlight LEDs will emit light or no light at all. If the image content of a zone image corresponding to a backlight zone is low-brightness content, it means that the backlight zone currently needs diffused light (i.e., the light pattern information required for the backlight zone is diffused light). In this case, more diffused backlight LEDs in the backlight zone will emit light, while fewer focused backlight LEDs will emit light or no light at all.

[0087] Based on the light pattern information currently required by each backlight zone, the required level of focused and diffused light for each backlight zone can be determined, thereby adjusting the luminous brightness of the focused and diffused backlights in each backlight zone. If the current light pattern information required by a backlight zone is more focused and less diffused, the luminous brightness of the focused backlight in that backlight zone can be increased, and the luminous brightness of the diffused backlight in that backlight zone can be decreased. Conversely, if the current light pattern information required by a backlight zone is less focused and more diffused, the luminous brightness of the focused backlight in that backlight zone can be decreased, and the luminous brightness of the diffused backlight in that backlight zone can be increased.

[0088] Specifically, refer to Figure 1 The controller 120 divides the image to be displayed on the display 140 according to the number of backlight zones included in the backlight assembly 150, and obtains the zone image corresponding to each backlight zone. Then, it analyzes the image content of the zone image corresponding to each backlight zone to obtain the brightness of the image content of the zone image corresponding to each backlight zone. Based on the brightness of the image content of the zone image corresponding to each backlight zone, it queries the correspondence between the brightness and the light pattern information to obtain the light pattern information currently required for each backlight zone. Finally, based on the light pattern information currently required for each backlight zone, it determines the target luminous brightness of the focused backlight and diffused backlight in each backlight zone of the backlight assembly 150, and adjusts the luminous brightness of the focused backlight and diffused backlight in each backlight zone of the backlight assembly 150 accordingly.

[0089] The technical solution provided in this embodiment first divides the image to be displayed on the display to obtain a partition image corresponding to each backlight partition. Then, based on the image content of the partition image corresponding to each backlight partition, the light pattern information currently required by each backlight partition is obtained. Finally, based on the light pattern information currently required by each backlight partition, the luminous brightness of the focusing backlight and the diffused backlight in each backlight partition is adjusted. In this way, based on the image content of the partition image corresponding to each backlight partition, the light pattern currently required by each backlight partition is dynamically determined, and based on the light pattern currently required by each backlight partition, the luminous brightness of the focusing backlight and the diffused backlight in each backlight partition is adaptively adjusted, so that the focusing brightness and diffused brightness provided by each backlight partition are adapted to the image content of that backlight partition, thereby reducing the halo phenomenon and improving the image display effect of the display device. At the same time, it avoids the defect of the traditional technology where the brightness provided by the backlight system is kept constant, which makes the display device prone to halo phenomenon and thus leads to poor image display effect.

[0090] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0091] The partition image corresponding to each backlight partition is further divided to obtain multiple sub-partition images corresponding to each backlight partition. Based on the image content of each sub-partition image corresponding to each backlight partition and the partition image corresponding to each backlight partition, the brightness ratio of each sub-partition image corresponding to each backlight partition is obtained. Based on the brightness ratio of each sub-partition image corresponding to each backlight partition, the light pattern information required for each backlight partition is determined.

[0092] Each backlight zone's corresponding zone image can be further divided into multiple sub-zone images, such as 16 sub-zone images; and the number of sub-zone images corresponding to each backlight zone is equal. A sub-zone image refers to a portion of the zone image.

[0093] Within the same backlight zone, the brightness ratio of each sub-zone image relative to the corresponding zone image of the backlight zone is calculated. For example, based on the brightness of each sub-zone image and the brightness of the corresponding zone image of the backlight zone, the brightness ratio of each sub-zone image relative to the corresponding zone image of the backlight zone is calculated.

[0094] Specifically, by determining the brightness ratio of each sub-zone image corresponding to each backlight zone within the overall brightness of that backlight zone, the brightness of the image content in each backlight zone's corresponding zone image can be identified. For example, if there are many sub-zone images with a high brightness ratio in the same backlight zone, it indicates that the image content of the corresponding zone image is high-brightness content; conversely, if there are few sub-zone images with a high brightness ratio in the same backlight zone, it indicates that the image content of the corresponding zone image is low-brightness content.

[0095] Specifically, refer to Figure 1 The controller 120 further divides the partition image corresponding to each backlight partition according to a predetermined number of sub-partition images, resulting in multiple sub-partition images corresponding to each backlight partition. Then, based on the image content of each sub-partition image corresponding to each backlight partition and the brightness of each partition image corresponding to each backlight partition, the controller 120 obtains the brightness of each sub-partition image corresponding to each backlight partition and the brightness of each partition image corresponding to each backlight partition. Based on this, the controller calculates the brightness ratio of each sub-partition image corresponding to each backlight partition relative to the brightness of each partition image corresponding to each backlight partition. Finally, based on the brightness ratio of each sub-partition image corresponding to each backlight partition relative to the brightness of each partition image corresponding to each backlight partition, the controller determines the brightness of each partition image corresponding to each backlight partition and calculates the light pattern information currently required for each backlight partition.

[0096] The technical solution provided in this embodiment, when determining the light pattern information currently needed for each backlight zone, comprehensively considers the brightness ratio of each sub-zone image corresponding to each backlight zone to the brightness of the corresponding zone image. This can effectively determine the brightness of the image content of the zone image corresponding to each backlight zone, so that the light pattern information currently needed for each backlight zone is finally determined to match the brightness of the image content of the zone image corresponding to each backlight zone, thereby improving the accuracy of determining the light pattern information currently needed for each backlight zone.

[0097] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0098] Obtain the size information of the backlight partition and the resolution information of the display 140; determine the number of sub-partition images corresponding to each backlight partition based on the size information and resolution information; further divide the partition images corresponding to each backlight partition according to the number of sub-partition images to obtain multiple sub-partition images corresponding to each backlight partition.

[0099] The size information of the backlight zone refers to the size of the backlight zone.

[0100] The number of sub-region images corresponding to each backlight zone is determined by the size information of the backlight zone and the resolution information of the 140 display. It is necessary to ensure that common halo-generating scenes such as text and icons are separated from the background image in a relatively precise manner within the sub-region.

[0101] Specifically, refer to Figure 1 The controller 120 obtains the size information of the backlight partition and the resolution information of the display 140 from the local database. Based on the size information and resolution information, it queries the correspondence between the size information, resolution information and the number of sub-partition images to obtain the number of sub-partition images corresponding to each backlight partition. Finally, according to the number of sub-partition images, the partition images corresponding to each backlight partition are further divided to obtain multiple sub-partition images corresponding to each backlight partition.

[0102] For example, the controller 120 divides the image to be displayed on the display 140 into 10 partition images, and then divides each partition image into 16 sub-partition images.

[0103] The technical solution provided in this embodiment comprehensively considers the size information of the backlight partition and the resolution information of the display to determine the number of sub-partition images corresponding to each backlight partition, and uses this to further divide the partition images corresponding to each backlight partition. This can effectively provide reference information for the further division of partition images, thereby making the number of sub-partition images more accurate. It avoids the defect that too many or too few sub-partition images are ultimately divided, which would affect the determination of subsequent light pattern information and lead to a low accuracy in determining the light pattern information currently needed for each backlight partition.

[0104] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0105] The pixel values ​​of sub-region pixels in each sub-region image corresponding to each backlight zone are determined, as well as the pixel values ​​of partition pixels in each partition image corresponding to each backlight zone; the pixel values ​​are used to represent brightness information; the pixel values ​​of sub-region pixels in each sub-region image corresponding to each backlight zone are summed to obtain the brightness of each sub-region image corresponding to each backlight zone, and the pixel values ​​of partition pixels in each partition image corresponding to each backlight zone are summed to obtain the brightness of each partition image corresponding to each backlight zone; based on the brightness of each sub-region image corresponding to each backlight zone and the brightness of each partition image corresponding to each backlight zone, the brightness ratio of each sub-region image corresponding to each backlight zone in the partition image corresponding to each backlight zone is obtained.

[0106] Here, a sub-partition pixel refers to any pixel in a sub-partition image; the pixel value of each sub-partition pixel is used to characterize the brightness information of each sub-partition pixel, and is specifically determined based on the three color channel values ​​of each sub-partition pixel, such as taking the maximum value of R / G / B.

[0107] In this context, a partitioned pixel refers to any pixel in a partitioned image; the pixel value of each partitioned pixel is used to characterize the brightness information of each partitioned pixel, and is specifically determined based on the three color channel values ​​of each partitioned pixel, such as taking the maximum value of R / G / B.

[0108] The brightness of each sub-partition image is equal to the sum of the pixel values ​​of all sub-partition pixels in that sub-partition image.

[0109] In the same backlight zone, the brightness ratio of a single sub-zone image to the total brightness of the zone image is equal to the brightness of the single sub-zone image divided by the brightness of the zone image.

[0110] Specifically, refer to Figure 1The controller 120 calculates the pixel value of each sub-partition pixel in the sub-partition image corresponding to each backlight partition based on the three color channel values ​​of the sub-partition pixels in the sub-partition image corresponding to each backlight partition. Simultaneously, it calculates the pixel value of each partition pixel in the partition image corresponding to each backlight partition based on the three color channel values ​​of the partition pixels in the partition image corresponding to each backlight partition. Then, it sums the pixel values ​​of the sub-partition pixels in the sub-partition image corresponding to each backlight partition to obtain the brightness of each sub-partition image, and sums the pixel values ​​of the partition pixels in the partition image corresponding to each backlight partition to obtain the brightness of the partition image corresponding to each backlight partition. Finally, based on the brightness of each sub-partition image and the brightness of the partition image corresponding to each backlight partition, it calculates the brightness ratio of each sub-partition image relative to the total brightness of the corresponding partition image.

[0111] For example, suppose each backlight zone corresponds to 16 sub-zones, labeled as sub-zones r0 to r15; calculate the brightness ratio of each sub-zone relative to the entire zone, denoted as apl_ratio_r0 to r15, and sort the values ​​from highest to lowest; for example, the brightness ratio of sub-zone r0 is:

[0112]

[0113] Where n represents the total number of pixels in sub-partition r0, m represents the total number of pixels in the partition to which sub-partition r0 belongs, Y' represents the sub-partition pixels in sub-partition r0, whose pixel value takes the maximum value of R / G / B, and Y represents the partition pixels in the partition to which sub-partition r0 belongs, whose pixel value takes the maximum value of R / G / B.

[0114] In addition, the brightness ratio of other sub-partitions to the entire partition (apl_ratio_r1~15) is also calculated with reference to formula (1).

[0115] The technical solution provided in this embodiment determines the brightness of each sub-region image corresponding to each backlight zone by adding the pixel values ​​of the sub-region pixels in each sub-region image corresponding to each backlight zone, and determines the brightness of each partition image corresponding to each backlight zone by adding the pixel values ​​of the partition pixels in each partition image corresponding to each backlight zone. This improves the accuracy of determining the brightness of each sub-region image corresponding to each backlight zone and the brightness of each partition image corresponding to each backlight zone, thereby making the final determined brightness ratio of each sub-region image corresponding to each backlight zone more accurate, and thus improving the accuracy of brightness ratio determination.

[0116] In some embodiments, such as Figure 1As shown, controller 120 is also configured as follows:

[0117] Sort the images of each sub-zone corresponding to each backlight zone according to their brightness ratio from high to low, and obtain the sorted brightness ratios for each backlight zone. From the sorted brightness ratios for each backlight zone, select the first preset number of brightness ratios and add them together to obtain the target brightness ratio for each backlight zone. Based on the target brightness ratio for each backlight zone, determine the light pattern information required for each backlight zone.

[0118] The preset number can be half the number of sub-partition images (e.g., 16), such as 8, and can also be adjusted according to the actual situation.

[0119] The target brightness ratio for each backlight zone is equal to the sum of the first preset number of brightness ratios among the sorted brightness ratios for each backlight zone.

[0120] Specifically, based on the target brightness ratio corresponding to each backlight zone, the brightness of the image content of the zone image corresponding to each backlight zone can be determined. If the target brightness ratio corresponding to a backlight zone is high, it means that the image content of the zone image corresponding to that backlight zone is high-brightness content; if the target brightness ratio corresponding to a backlight zone is low, it means that the image content of the zone image corresponding to that backlight zone is low-brightness content.

[0121] Specifically, refer to Figure 1 The controller 120 sorts the brightness ratios of each sub-zone image corresponding to each backlight zone in descending order of brightness ratio, obtaining the sorted brightness ratios for each backlight zone. Then, it selects a preset number (e.g., 8) of brightness ratios from the sorted brightness ratios for each backlight zone and adds them together to obtain the target brightness ratio for each backlight zone. Based on the target brightness ratio for each backlight zone, it queries the correspondence between the target brightness ratio and the brightness status to obtain the brightness status of the image content of the sub-zone image corresponding to each backlight zone. Based on the brightness status of the image content of the sub-zone image corresponding to each backlight zone, it determines the light pattern information currently required for each backlight zone.

[0122] For example, suppose a backlight zone corresponds to 16 sub-zones, which means there are 16 brightness ratios. Sort these 16 brightness ratios in descending order of brightness ratio, select the top 8 brightness ratios, and add these top 8 brightness ratios together to obtain the target brightness ratio corresponding to the backlight zone.

[0123] The technical solution provided in this embodiment, when determining the light pattern information currently needed for each backlight zone, comprehensively considers the sum of the first preset number of brightness ratios in the sorted brightness ratios corresponding to each backlight zone, which can accurately determine the brightness of the image content of each backlight zone's partition image, thereby facilitating the accurate determination of the light pattern information currently needed for each backlight zone.

[0124] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0125] If the target brightness ratio corresponding to the backlight zone is greater than a first preset threshold, the light pattern information currently needed by the backlight zone is determined as the first light pattern information; or, if the target brightness ratio corresponding to the backlight zone is less than a second preset threshold, the light pattern information currently needed by the backlight zone is determined as the second light pattern information; or, if the target brightness ratio corresponding to the backlight zone is less than or equal to the first preset threshold and greater than or equal to the second preset threshold, the light pattern information corresponding to the target brightness ratio is obtained as the light pattern information currently needed by the backlight zone; wherein, the value corresponding to the first light pattern information is greater than the value corresponding to the second light pattern information, and the value of the light pattern information corresponding to the target brightness ratio is less than the value corresponding to the first light pattern information and greater than the value corresponding to the second light pattern information.

[0126] The first preset threshold can be 90%, or it can be adjusted according to the actual situation.

[0127] The second preset threshold can be 50%, or it can be adjusted according to the actual situation.

[0128] Among them, the first light pattern information refers to the first light pattern value of 100, which is used to indicate focused light.

[0129] The second light pattern information refers to the second light pattern value of 0, which is used to represent astigmatism.

[0130] Among them, the light pattern information corresponding to the target brightness ratio refers to the light pattern value corresponding to the target brightness ratio, which is between 100 and 0.

[0131] Specifically, when the target brightness ratio of a backlight zone is less than or equal to a first preset threshold, and the target brightness ratio of a backlight zone is greater than or equal to a second preset threshold, the light pattern information currently required by the backlight zone is the light pattern information corresponding to the target brightness ratio of that backlight zone. Further, in this case, the light pattern information currently required by the backlight zone = (target brightness ratio - second preset threshold) × 100 / (first preset threshold - second preset threshold).

[0132] For example, see reference. Figure 4 When the sum of the brightness ratios of the current N sub-regions (apl_ratio_sumN) is greater than the first preset threshold (apl_ratio_th_h) (where N can be 8 and apl_ratio_th_h can be 90%), the region is considered a concentrated brightness region and requires focused backlighting; in this case, the output light pattern value is 100. When the sum of the brightness ratios of the current N sub-regions (apl_ratio_sumN) is less than the second preset threshold (apl_ratio_th_l) (where N can be 8 and apl_ratio_th_h can be 50%), the region is considered a dispersed brightness region and requires diffused backlighting; in this case, the output light pattern value is 0. When the sum of the brightness ratios of the current N sub-regions is between the two thresholds, the output light pattern value is between 100 and 0, calculated using the following formula:

[0133]

[0134] The technical solution provided in this embodiment, when determining the light pattern information currently needed for each backlight zone, comprehensively considers the comparison between the target brightness ratio corresponding to each backlight zone and the first preset threshold and the second preset threshold, and divides it into three cases to determine the light pattern information. This makes the final determined light pattern information more accurate, thereby improving the accuracy of determining the light pattern information currently needed for each backlight zone. This facilitates accurate dimming based on the light pattern information in the future, and further helps to improve the image display effect of the display device.

[0135] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0136] Based on the target brightness ratio corresponding to the backlight zone, query the correspondence between the brightness ratio and the light pattern information to obtain the light pattern information corresponding to the target brightness ratio.

[0137] There is a one-to-one correspondence between the brightness ratio and the light pattern information; the light pattern information corresponding to the brightness ratio of each target can be pre-calculated by formula (2), thereby constructing the correspondence between the brightness ratio and the light pattern information.

[0138] Specifically, refer to Figure 1 When the target brightness ratio of the backlight partition is less than or equal to the first preset threshold and the target brightness ratio of the backlight partition is greater than or equal to the second preset threshold, the controller 120 queries the correspondence between the brightness ratio and the light pattern information according to the target brightness ratio of the backlight partition, and obtains the light pattern information corresponding to the target brightness ratio of the backlight partition as the light pattern information currently needed for the backlight partition.

[0139] The technical solution provided in this embodiment determines the light pattern information corresponding to the target brightness ratio by querying the correspondence between the brightness ratio and the light pattern information based on the target brightness ratio of the backlight partition. This eliminates the need for complex calculations to obtain the light pattern information corresponding to the target brightness ratio, thus saving time in determining the light pattern information corresponding to the target brightness ratio and improving the efficiency of determining the light pattern information corresponding to the target brightness ratio.

[0140] In some embodiments, such as Figure 1 As shown, controller 120 is also configured as follows:

[0141] Based on the light pattern information required for each backlight zone, the correspondence between the light pattern information and the luminous information of the focused backlight and the diffused backlight is queried to obtain the luminous information of the focused backlight and the diffused backlight in each backlight zone; based on the luminous information of the focused backlight and the diffused backlight in each backlight zone, the luminous brightness of the focused backlight and the diffused backlight in each backlight zone is adjusted.

[0142] Each light pattern corresponds to the luminous information of a focused backlight and a diffused backlight. The luminous information of the focused backlight is used to characterize the target luminous brightness (or target light intensity) of the focused backlight. The luminous information of the diffused backlight is used to characterize the target luminous brightness (or target light intensity) of the diffused backlight. For example, the light intensities (values ​​controlling the light intensity) of the spotlight and diffuser lamps corresponding to the light pattern values ​​100 to 0 are predefined. These values ​​are determined and adjusted during the backlight design phase. The spotlight light intensity J100 to J0 gradually decreases, while the diffuser light intensity S100 to S0 gradually increases. See Table 1 for details.

[0143] Table 1. Correspondence between light pattern values ​​and spotlight and diffused light intensities.

[0144]

[0145] Based on the luminous information of the focused backlight and diffused backlight in each backlight zone, the target luminous brightness of the focused backlight and diffused backlight in each backlight zone can be determined, and the luminous brightness of the focused backlight and diffused backlight in each backlight zone can be adjusted accordingly.

[0146] Specifically, refer to Figure 1The controller 120 retrieves the correspondence between light pattern information and the luminous information of the focused backlight and the diffused backlight from the local database, as shown in Table 1. Then, based on the light pattern information currently required for each backlight zone, it queries the correspondence between the light pattern information and the luminous information of the focused backlight and the diffused backlight to obtain the luminous information of the focused and diffused backlights in each backlight zone. Based on this luminous information, it determines the target luminous brightness of the focused backlight and the target luminous brightness of the diffused backlight in each backlight zone. Finally, based on the target luminous brightness of the focused backlight and the target luminous brightness of the diffused backlight in each backlight zone, it adjusts the luminous brightness of the focused backlight and the diffused backlight in each backlight zone of the backlight assembly 150. The luminance of the backlight is adjusted so that the luminance of the focused backlight in each backlight zone reaches the corresponding target luminance, and the luminance of the diffused backlight in each backlight zone reaches the corresponding target luminance. For example, the controller 120 sends the luminance information of the focused backlight and diffused backlight in each backlight zone to the drive device 130. The drive device 130 converts the luminance information of the focused backlight and diffused backlight in each backlight zone into a backlight drive signal for each backlight zone, and sends the backlight drive signal for each backlight zone to the backlight assembly 150 to adjust the luminance of the focused backlight and diffused backlight in each backlight zone in the backlight assembly 150, so that the focused backlight and diffused backlight in each backlight zone can adjust their current brightness to the corresponding luminance.

[0147] For example, referring to Table 1, if the required light pattern value for a backlight zone is 100, it means that the light intensity of the focused backlight in that backlight zone is J100 and the light intensity of the diffused backlight is S100. Then, the controller 120 can adjust the luminous brightness of the focused backlight and the diffused backlight in that backlight zone according to the light intensity J100 of the focused backlight and the light intensity S100 of the diffused backlight.

[0148] The technical solution provided in this embodiment converts the light pattern information currently needed for each backlight zone into the light emission information of the focused backlight and the diffused backlight in each backlight zone by establishing a correspondence between light pattern information and the light emission information of the focused backlight and the diffused backlight in each backlight zone. Based on the light emission information of the focused backlight and the diffused backlight in each backlight zone, the brightness of the focused backlight and the diffused backlight in each backlight zone is adjusted. That is, the brightness of the focused backlight and the diffused backlight in each backlight zone is adjusted in the form of light emission information, which is beneficial to more accurately adjust the brightness of the focused backlight and the diffused backlight in each backlight zone.

[0149] In some embodiments, such as Figure 1 As shown, the number of focused backlights and diffused backlights are the same in each backlight zone.

[0150] In each backlight zone, the number of focused backlight sources and diffused backlight sources are equal, each accounting for 50%. Of course, the ratio can be adjusted according to the actual backlight effect.

[0151] For example, each backlight zone can be equipped with 3 spotlight backlight LEDs and 3 diffuser backlight LEDs, and the 3 spotlight backlight LEDs and 3 diffuser backlight LEDs are arranged in a mixed manner, such as spotlight backlight LED A1, diffuser backlight LED B1, spotlight backlight LED A2, diffuser backlight LED B2, spotlight backlight LED A3, and diffuser backlight LED B3.

[0152] The technical solution provided in this embodiment sets the same number of focusing backlights and diffused backlights in each backlight zone, so that the focusing brightness and diffused brightness in each backlight zone can be effectively controlled during subsequent backlight dimming. That is, each backlight zone can provide both the corresponding focusing brightness and the corresponding diffused brightness, so that the focusing brightness and diffused brightness provided by each backlight zone are adapted to the image content of the backlight zone, thereby improving the image display effect of the display device.

[0153] In some embodiments, such as Figure 1 As shown, a backlight adjustment method is provided, which can be applied to, for example... Figure 1 The display device shown, such as Figure 1 As shown, the display device may include a display 140, a backlight assembly 150, and a controller 120; the controller 120 is coupled to the display 140 and the backlight assembly 150 respectively; the backlight assembly 150 includes a plurality of backlight zones, each backlight zone including a focusing backlight source and a diffusing backlight source; the method may include the following steps:

[0154] Step S501: Divide the image to be displayed on the display 140 to obtain the partition image corresponding to each backlight partition.

[0155] Step S502: Based on the image content of the partition image corresponding to each backlight partition, obtain the light pattern information currently required for each backlight partition; the light pattern information is used to characterize the degree of convergence and divergence.

[0156] Step S503: Adjust the luminous brightness of the focused backlight and diffused backlight in each backlight zone according to the light pattern information required by each backlight zone.

[0157] It should be noted that the specific implementation process of the above backlight adjustment method can be found in [reference needed]. Figure 1 The relevant embodiments of the display device shown will not be described in detail here.

[0158] The technical solution provided in this embodiment dynamically determines the light pattern required for each backlight zone based on the image content of the zone image corresponding to each backlight zone. Based on the light pattern required for each backlight zone, the luminous brightness of the focusing backlight and the diffused backlight in each backlight zone is adaptively adjusted so that the focusing brightness and diffused brightness provided by each backlight zone are adapted to the image content of that backlight zone. This reduces the halo effect and improves the image display effect of the display device. At the same time, it avoids the defect of the traditional technology where the brightness provided by the backlight system is kept consistent, which makes the display device prone to halo effect and thus results in poor image display effect.

[0159] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0160] The partition image corresponding to each backlight partition is further divided to obtain multiple sub-partition images corresponding to each backlight partition. Based on the image content of each sub-partition image corresponding to each backlight partition and the partition image corresponding to each backlight partition, the brightness ratio of each sub-partition image corresponding to each backlight partition is obtained. Based on the brightness ratio of each sub-partition image corresponding to each backlight partition, the light pattern information required for each backlight partition is determined.

[0161] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0162] Obtain the size information of the backlight partition and the resolution information of the display; determine the number of sub-partition images corresponding to each backlight partition based on the size information and resolution information; further divide the partition images corresponding to each backlight partition according to the number of sub-partition images to obtain multiple sub-partition images corresponding to each backlight partition.

[0163] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0164] The pixel values ​​of sub-region pixels in each sub-region image corresponding to each backlight zone are determined, as well as the pixel values ​​of partition pixels in each partition image corresponding to each backlight zone; the pixel values ​​are used to represent brightness information; the pixel values ​​of sub-region pixels in each sub-region image corresponding to each backlight zone are summed to obtain the brightness of each sub-region image corresponding to each backlight zone, and the pixel values ​​of partition pixels in each partition image corresponding to each backlight zone are summed to obtain the brightness of each partition image corresponding to each backlight zone; based on the brightness of each sub-region image corresponding to each backlight zone and the brightness of each partition image corresponding to each backlight zone, the brightness ratio of each sub-region image corresponding to each backlight zone in the partition image corresponding to each backlight zone is obtained.

[0165] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0166] Sort the images of each sub-zone corresponding to each backlight zone according to their brightness ratio from high to low, and obtain the sorted brightness ratios for each backlight zone. From the sorted brightness ratios for each backlight zone, select the first preset number of brightness ratios and add them together to obtain the target brightness ratio for each backlight zone. Based on the target brightness ratio for each backlight zone, determine the light pattern information required for each backlight zone.

[0167] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0168] If the target brightness ratio corresponding to the backlight zone is greater than a first preset threshold, the light pattern information currently needed by the backlight zone is determined as the first light pattern information; or, if the target brightness ratio corresponding to the backlight zone is less than a second preset threshold, the light pattern information currently needed by the backlight zone is determined as the second light pattern information; or, if the target brightness ratio corresponding to the backlight zone is less than or equal to the first preset threshold and greater than or equal to the second preset threshold, the light pattern information corresponding to the target brightness ratio is obtained as the light pattern information currently needed by the backlight zone; wherein, the value corresponding to the first light pattern information is greater than the value corresponding to the second light pattern information, and the value of the light pattern information corresponding to the target brightness ratio is less than the value corresponding to the first light pattern information and greater than the value corresponding to the second light pattern information.

[0169] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0170] Based on the target brightness ratio corresponding to the backlight zone, query the correspondence between the brightness ratio and the light pattern information to obtain the light pattern information corresponding to the target brightness ratio.

[0171] In some embodiments, the backlight adjustment method described above may further include the following steps:

[0172] Based on the light pattern information required for each backlight zone, the correspondence between the light pattern information and the luminous information of the focused backlight and the diffused backlight is queried to obtain the luminous information of the focused backlight and the diffused backlight in each backlight zone; based on the luminous information of the focused backlight and the diffused backlight in each backlight zone, the luminous brightness of the focused backlight and the diffused backlight in each backlight zone is adjusted.

[0173] In some embodiments, the number of focused backlights and diffused backlights in each backlight zone is the same.

[0174] In some embodiments, such as Figure 3 As shown, to more clearly describe the signaling interaction flow between the modules of the display device, this application also provides another backlight adjustment method, which may include the following steps:

[0175] In step S301, the controller 120 divides the image to be displayed on the display 140 to obtain the partition image corresponding to each backlight partition.

[0176] In step S302, the controller 120 further divides the partition image corresponding to each backlight partition to obtain multiple sub-partition images corresponding to each backlight partition.

[0177] In step S303, the controller 120 determines the pixel value of the sub-partition pixel in each sub-partition image corresponding to each backlight partition, and determines the pixel value of the partition pixel in the partition image corresponding to each backlight partition; the pixel value is used to characterize the brightness information.

[0178] In step S304, the controller 120 sums the pixel values ​​of the sub-partition pixels in each sub-partition image corresponding to each backlight partition to obtain the brightness of each sub-partition image corresponding to each backlight partition, and sums the pixel values ​​of the partition pixels in each partition image corresponding to each backlight partition to obtain the brightness of the partition image corresponding to each backlight partition.

[0179] In step S305, the controller 120 obtains the brightness ratio of each sub-zone image corresponding to each backlight zone to the brightness ratio of the corresponding partition image of each backlight zone based on the brightness of each sub-zone image corresponding to each backlight zone and the brightness of the partition image corresponding to each backlight zone.

[0180] In step S306, the controller 120 sorts the brightness ratios of each sub-zone image corresponding to each backlight zone in descending order of brightness ratio, thereby obtaining the sorted brightness ratios for each backlight zone.

[0181] In step S307, the controller 120 selects a preset number of brightness ratios from the sorted brightness ratios corresponding to each backlight zone, and adds the preset number of brightness ratios together to obtain the target brightness ratio corresponding to each backlight zone; based on the target brightness ratio corresponding to each backlight zone, it determines the light pattern information currently required for each backlight zone.

[0182] In step S308, the controller 120 queries the correspondence between the light pattern information and the light emission information of the focused backlight and the diffused backlight according to the light pattern information currently required for each backlight zone, and obtains the light emission information of the focused backlight and the diffused backlight in each backlight zone.

[0183] In step S309, the controller 120 sends the light emission information of the focusing backlight and the diffused backlight in each backlight zone to the backlight assembly 150.

[0184] In step S310, the backlight assembly 150 adjusts the luminous brightness of the focused backlight and diffused backlight in each backlight zone according to the luminous information of the focused backlight and diffused backlight in each backlight zone.

[0185] Step S311: The display 150 displays the image to be displayed.

[0186] The technical solution provided in this embodiment dynamically determines the light pattern required for each backlight zone based on the image content of the zone image corresponding to each backlight zone. Based on the light pattern required for each backlight zone, the luminous brightness of the focusing backlight and the diffused backlight in each backlight zone is adaptively adjusted so that the focusing brightness and diffused brightness provided by each backlight zone are adapted to the image content of that backlight zone. This reduces the halo effect and improves the image display effect of the display device. At the same time, it avoids the defect of the traditional technology where the brightness provided by the backlight system is kept consistent, which makes the display device prone to halo effect and thus results in poor image display effect.

[0187] In some embodiments, to more clearly illustrate the backlight adjustment method provided in this application, the following specific embodiment will be used to describe the backlight adjustment method in detail. Reference Figure 4This application also provides a television local dimming method based on backlight zoning, which can calculate the required light pattern according to the image content within the backlight zoning zone, and reduce the halo effect by adjusting the light pattern of the backlight system. The specific details are as follows:

[0188] 1. Adjustable backlight system

[0189] In this application, the TV's local dimming backlight not only allows for brightness adjustment but also beam pattern adjustment. Beam pattern adjustment refers to the variable beam angle of the backlight LEDs, enabling a smooth transition between focused and diffused light. The beam pattern value from 100 to 0 represents the change in the backlight LED beam angle from focused to diffused light; that is, 100 represents focused light, and 0 represents diffused light. Values ​​between 100 and 0 represent a smooth transition from focused to diffused light. The beam pattern change is achieved by mixing and arranging focused and diffused LEDs to control their respective brightness ratios. The ratio of focused and diffused LEDs is 50% each, but this can be adjusted according to the actual backlight effect. When focused light is required, more focused LEDs emit light, while fewer diffused LEDs emit light or none at all. When diffused light is required, more diffused LEDs emit light, while fewer focused LEDs emit light or none at all. Here, the light intensity (the value controlling the light intensity) of the spotlight and diffuser lamps needs to be predefined, corresponding one-to-one with the light pattern values ​​of 100 to 0. These values ​​are determined and adjusted during the backlight design phase, as shown in Table 1. Specifically, the spotlight light intensity J100 to J0 gradually decreases, while the diffuser light intensity S100 to S0 gradually increases. Furthermore, the beam variation can also be achieved by mechanically adjusting the beam angle using a single LED; this is not limited here.

[0190] 2. After receiving the image signal, the image processing unit analyzes the image signal.

[0191] Based on the number of backlight zones, the target image to be displayed is divided into multiple image regions to obtain the partition image corresponding to each backlight zone. Then, the image within each backlight zone is further divided into N equal parts, where N is determined according to the size of the backlight zone and the resolution of the display. It is necessary to ensure that common halo-generating scenes such as text and icons are clearly separated from the background image within the sub-partitions. Then, the brightness ratio of each sub-partition is calculated according to formula (1).

[0192] 3. Calculate the required light pattern value based on the image content information within the backlight zone.

[0193] If a zone contains primarily high-brightness image content, then that zone may require focused LEDs to provide stronger light. If a zone contains primarily low-brightness image content, then that zone can use diffused LEDs or adjust the backlight system to achieve a diffused light effect. For example, Figure 4In this process, by calculating the backlight brightness of each zone, the brightness of that zone can be obtained, and thus the required light pattern information for that backlight zone can be obtained; or, by... Figure 4 The flowchart and formula (2) on the left can be used to calculate the current light pattern value required for each backlight zone.

[0194] 4. The backlight control unit adjusts the backlight system's light pattern based on the calculated light pattern values.

[0195] Based on the light pattern values ​​calculated from the image content of each zone, the corresponding spotlight and diffuser light emission values ​​are located, and the brightness of the spotlights and diffusers in each zone is adjusted to achieve light pattern switching. This method dynamically adjusts the backlight system according to the image content, improving the halo effect of the displayed image and thus enhancing the image display quality and viewing experience.

[0196] The technical solution provided in this embodiment can calculate the required light pattern based on the image content within the backlight zone, and improve the halo effect by adjusting the light pattern of the backlight system, thereby helping to reduce the halo phenomenon and improving the image display effect of the TV screen.

[0197] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0198] Based on the same inventive concept, this application also provides a backlight adjustment device for implementing the backlight adjustment method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more backlight adjustment device embodiments provided below can be found in the limitations of the backlight adjustment method described above, and will not be repeated here.

[0199] In some embodiments, such as Figure 5 As shown, a backlight adjustment device 500 is provided, which can be applied to applications such as... Figure 1 The display device shown, such as Figure 1As shown, the display device may include a display 140, a backlight assembly 150, and a controller 120; the controller 120 is coupled to both the display 140 and the backlight assembly 150; the backlight assembly 150 includes multiple backlight zones, each backlight zone including a focusing backlight source and a diffusing backlight source; the device may include:

[0200] The image segmentation module 510 is used to segment the image to be displayed on the monitor to obtain the partition image corresponding to each backlight partition.

[0201] The information determination module 520 is used to obtain the light pattern information currently needed for each backlight zone based on the image content of the zone image corresponding to each backlight zone; the light pattern information is used to characterize the degree of light convergence and divergence.

[0202] The brightness adjustment module 530 is used to adjust the luminous brightness of the focused backlight and diffused backlight in each backlight zone according to the light pattern information required by each backlight zone.

[0203] Each module in the aforementioned backlight adjustment device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0204] In some embodiments, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0205] In some embodiments, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0206] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0207] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0208] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0209] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized by comprising: The display comprises: a display; a backlight assembly; the backlight assembly comprises a plurality of backlight sub-zones, at least one backlight sub-zone comprises a condensing backlight source and a diffusing backlight source; a controller coupled with the display and the backlight assembly respectively, and configured to: perform division processing on a to-be-displayed image of the display to obtain a sub-zone image corresponding to each backlight sub-zone; obtain light type information currently required by each backlight sub-zone according to image content of the sub-zone image corresponding to each backlight sub-zone; the light type information is used to represent the degree of condensing and diffusing light; adjust the light emitting brightness of the condensing backlight source and the diffusing backlight source in each backlight sub-zone according to the light type information currently required by each backlight sub-zone.

2. The display device of claim 1, wherein, The controller is further configured to: perform re-division processing on the sub-zone image corresponding to each backlight sub-zone to obtain a plurality of sub-sub-zone images corresponding to each backlight sub-zone; obtain a brightness proportion of each sub-sub-zone image corresponding to each backlight sub-zone in the sub-zone image corresponding to each backlight sub-zone according to image content of each sub-sub-zone image corresponding to each backlight sub-zone and the sub-zone image corresponding to each backlight sub-zone respectively; determine the light type information currently required by each backlight sub-zone according to the brightness proportion of each sub-sub-zone image corresponding to each backlight sub-zone in the sub-zone image corresponding to each backlight sub-zone.

3. The display device of claim 2, wherein, The controller is further configured to: obtain size information of the backlight sub-zone and resolution information of the display; determine the number of sub-sub-zone images corresponding to each backlight sub-zone according to the size information and the resolution information; perform re-division processing on the sub-zone image corresponding to each backlight sub-zone according to the number of sub-sub-zone images to obtain a plurality of sub-sub-zone images corresponding to each backlight sub-zone.

4. The display device of claim 2, wherein, The controller is further configured to: determine pixel values of sub-sub-zone pixels in each sub-sub-zone image corresponding to each backlight sub-zone and determine pixel values of sub-zone pixels in the sub-zone image corresponding to each backlight sub-zone; the pixel values are used to represent brightness information; add the pixel values of the sub-sub-zone pixels in each sub-sub-zone image corresponding to each backlight sub-zone respectively to obtain the brightness of each sub-sub-zone image corresponding to each backlight sub-zone, and add the pixel values of the sub-zone pixels in the sub-zone image corresponding to each backlight sub-zone to obtain the brightness of the sub-zone image corresponding to each backlight sub-zone; obtain the brightness proportion of each sub-sub-zone image corresponding to each backlight sub-zone in the sub-zone image corresponding to each backlight sub-zone according to the brightness of each sub-sub-zone image corresponding to each backlight sub-zone and the brightness of the sub-zone image corresponding to each backlight sub-zone respectively.

5. The display device of claim 2, wherein, The controller is further configured to: sort the brightness proportion of each sub-sub-zone image corresponding to each backlight sub-zone in the sub-zone image corresponding to each backlight sub-zone according to the brightness proportion from high to low to obtain the sorted brightness proportion of each sub-sub-zone image corresponding to each backlight sub-zone. Screening a preset number of luminance proportions from the sorted luminance proportions corresponding to each backlight partition, and adding the preset number of luminance proportions to obtain a target luminance proportion corresponding to each backlight partition; Determining light type information currently required by each backlight partition according to the target luminance proportion corresponding to each backlight partition.

6. The display device of claim 5, wherein, The controller is further configured to: In a case where the target luminance proportion corresponding to the backlight partition is greater than a first preset threshold, determining that the light type information currently required by the backlight partition is first light type information; Or, In a case where the target luminance proportion corresponding to the backlight partition is less than a second preset threshold, determining that the light type information currently required by the backlight partition is second light type information; Or, In a case where the target luminance proportion corresponding to the backlight partition is less than or equal to the first preset threshold and greater than or equal to the second preset threshold, obtaining light type information corresponding to the target luminance proportion as the light type information currently required by the backlight partition; Wherein, a value corresponding to the first light type information is greater than a value corresponding to the second light type information, a value of the light type information corresponding to the target luminance proportion is less than the value corresponding to the first light type information and greater than the value corresponding to the second light type information.

7. The display device of claim 6, wherein, The controller is further configured to: According to the target luminance proportion corresponding to the backlight partition, querying a corresponding relationship between a luminance proportion and light type information to obtain light type information corresponding to the target luminance proportion.

8. The display device of claim 1, wherein, The controller is further configured to: According to the light type information currently required by each backlight partition, querying a corresponding relationship between light type information and light-emitting information of a spotlight type backlight source and light-emitting information of a diffuse light type backlight source to obtain the light-emitting information of the spotlight type backlight source and the diffuse light type backlight source in each backlight partition; According to the light-emitting information of the spotlight type backlight source and the diffuse light type backlight source in each backlight partition, adjusting the light-emitting brightness of the spotlight type backlight source and the diffuse light type backlight source in each backlight partition.

9. The display device according to any one of claims 1 to 8, characterized in that, The number of the spotlight type backlight sources and the number of the diffuse light type backlight sources in each backlight partition are the same.

10. A backlight adjustment method, characterized by, Applied to a display device, the display device includes a display, a backlight assembly and a controller; the controller is coupled with the display and the backlight assembly respectively; the backlight assembly includes a plurality of backlight partitions, each backlight partition including a spotlight type backlight source and a diffuse light type backlight source; The method includes: Dividing a to-be-displayed image of the display to obtain a partitioned image corresponding to each backlight partition; According to image content of the partitioned image corresponding to each backlight partition, obtaining light type information currently required by each backlight partition; the light type information is used to represent a degree of convergence and divergence; According to the light type information currently required by each backlight partition, adjusting the light-emitting brightness of the spotlight type backlight source and the diffuse light type backlight source in each backlight partition.

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