A backlight adjusting method of a display screen, a driving chip and a display device

Abstract

The application discloses a backlight adjusting method of a display screen, a driving chip and a display device. The display screen comprises a display panel and a backlight module. The backlight module comprises a plurality of backlight subareas. The display panel is used for displaying an image. The image comprises a plurality of subarea images which correspond to the plurality of backlight subareas one by one. The backlight adjusting method obtains initial backlight data of each subarea image, and determines the number of black field subareas in the plurality of subarea images according to the initial backlight data of each subarea image. The backlight current corresponding to the initial backlight data of each subarea image is defined as a first backlight current. Other subareas except the black field subareas in the image are regarded as a second area. When the number of the black field subareas is greater than a preset number, the backlight subareas corresponding to the second area are driven to be lighted up according to a second backlight current. The second backlight current is a backlight current greater than the first backlight current. The application can effectively improve the contrast of the image.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a backlight adjustment method for a display screen, a driver chip, and a display device. Background Technology

[0002] With the development of display technology, flat panel displays, with their advantages of high definition, good image color, energy saving, thinness, and portability, have been widely used in various information display products such as mobile phones, smartwatches, tablets, laptops, and televisions, and have broad market prospects. However, for liquid crystal displays (LCDs), their backlight modules have the disadvantage of low display contrast, which affects the display effect. Summary of the Invention

[0003] This application provides a backlight adjustment method, a driver chip, and a display device for a display screen to alleviate the problem of low display contrast in a backlight module.

[0004] This application provides a backlight adjustment method for a display screen. The display screen includes a display panel and a backlight module. The backlight module includes multiple backlight zones. The display panel is used to display images, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones. The backlight adjustment method includes:

[0005] The initial backlight data of each partition image is obtained, and the number of black field partitions in multiple partition images is determined based on the initial backlight data of each partition image; wherein, the backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the black field partition in the image is taken as the first region, and the other partition images in the image other than the black field partition are taken as the second region.

[0006] When the number of black screen zones is greater than the preset number, the backlight zones corresponding to the second area are illuminated according to the second backlight current; wherein, the second backlight current is a backlight current greater than the first backlight current.

[0007] In some embodiments, the backlight adjustment method for a display screen further includes:

[0008] When the second region operates for a longer time than a preset time based on the second backlight current, the second backlight current is switched to the first backlight current to drive the corresponding backlight partition of the second region to light up.

[0009] In some embodiments, the backlight adjustment method for a display screen further includes:

[0010] The backlight current of the backlight module is divided into a first current level and a second current level, and the first current level is marked as a first flag value, and the second current level is marked as a second flag value; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current.

[0011] In some embodiments of the backlight adjustment method for a display screen, driving the backlight partitions corresponding to the second region to light up according to the second backlight current includes:

[0012] Obtain the second flag value and configure the second backlight current according to the second flag value;

[0013] The second backlight current drives the corresponding backlight partition of the second area to light up.

[0014] In some embodiments of the backlight adjustment method for a display screen, switching the second backlight current to the first backlight current to drive the backlight partition corresponding to the second region to light up includes:

[0015] Obtain a first flag value and configure a first backlight current based on the first flag value;

[0016] The backlight partitions corresponding to the second area are illuminated based on the first backlight current.

[0017] In some embodiments, the backlight adjustment method for a display screen further includes:

[0018] When the number of black screen zones is less than or equal to the preset number, the backlight zones corresponding to each zone image are illuminated according to the first backlight current.

[0019] In some embodiments of the backlight adjustment method for a display screen, driving the backlight zones corresponding to each zone image to light up according to a first backlight current includes:

[0020] Obtain the first flag value and configure the first backlight current according to the first flag value;

[0021] The backlight partitions corresponding to each partition image are illuminated based on the first backlight current.

[0022] This application also provides a driver chip for a display screen, the display screen including a display panel and a backlight module, the backlight module including multiple backlight zones, the display panel for displaying images, the images including multiple zone images corresponding one-to-one with the multiple backlight zones; the driver chip is connected to at least one backlight zone, and the driver chip is used to execute the above-described backlight adjustment method for the display screen.

[0023] This application also provides a display device, the display device comprising:

[0024] The display screen includes a backlight module and a display panel. The display panel is used to display images. The backlight module includes multiple backlight zones, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones.

[0025] The main control chip is installed on the main control board. The main control chip is used to acquire the initial backlight data of each partition image, determine the number of black field partitions in multiple partition images based on the initial backlight data of each partition image, and output corresponding control signals based on the number of black field partitions. The backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the black field partitions in the image are defined as the first region, and the other partition images in the image other than the black field partitions are defined as the second region.

[0026] The driver board is equipped with a control chip and multiple driver circuits. The control chip is connected to the main control chip and the driver circuits respectively. Each driver circuit is connected to one or more backlight zones. When the number of black zone is greater than a preset number, the control chip is used to configure a second backlight current for the driver circuit corresponding to the second area according to the corresponding control signal. The corresponding driver circuit is used to drive the corresponding backlight zone to light up according to the second backlight current.

[0027] In some embodiments of the display device, the main control chip is further configured to divide the backlight current of the backlight module into a first current level and a second current level, and mark the first current level as a first flag value and the second current level as a second flag value; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current.

[0028] In some embodiments of the display device, the main control chip is used to output a second flag value to the control chip when the number of black field zones is greater than a preset number; the control chip is also used to configure a second backlight current for the corresponding driving circuit according to the second flag value.

[0029] In some embodiments of the display device, the main control chip is further configured to output a first flag value when the corresponding driving circuit operates for a preset time according to the second backlight current, and the control chip is further configured to configure the corresponding driving circuit from the second backlight current to the first backlight current according to the first flag value.

[0030] In some embodiments of the display device, the main control chip is further configured to output a first flag value to the control chip when the number of black field zones is less than or equal to a preset number; the control chip configures a first backlight current for each driving circuit according to the first flag value; each driving circuit is configured to drive the corresponding backlight zone to light up according to the first backlight current.

[0031] This application provides a backlight adjustment method, driver chip, and display device for a display screen. The backlight adjustment method defines the backlight current corresponding to each partition image as a first backlight current. When the number of black partitions in the image is greater than a preset number, a second backlight current greater than the first backlight current drives the backlight partitions corresponding to other partition images outside the black partitions to light up. This increases the backlight current of the backlight partitions corresponding to other partition images, thereby increasing the brightness of the corresponding backlight partitions and increasing the contrast with the black partitions. This increases the contrast of the entire image and improves the display effect. Attached Figure Description

[0032] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the backlight partition provided in an embodiment of this application.

[0034] Figure 2 This is a schematic diagram of a partitioned image provided in an embodiment of this application.

[0035] Figure 3 A flowchart of the first embodiment of the backlight adjustment method for a display screen provided in this application.

[0036] Figure 4 A flowchart of the second embodiment of the backlight adjustment method for a display screen provided in this application.

[0037] Figure 5 A schematic diagram comparing the first backlight current and the second backlight current in the backlight adjustment method of the display screen provided in the embodiments of this application.

[0038] Figure 6 A flowchart of step 200 in the backlight adjustment method for a display screen provided in an embodiment of this application.

[0039] Figure 7 A flowchart of step 300 in the backlight adjustment method for a display screen provided in an embodiment of this application.

[0040] Figure 8 A flowchart of the third embodiment of the backlight adjustment method for a display screen provided in this application.

[0041] Figure 9 This is a structural block diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] This embodiment provides a backlight dimming method for a display screen, wherein the display screen includes a display panel and a backlight module that provides backlight to the display panel, and the backlight module includes multiple backlight zones, such as... Figure 1 As shown, the backlight module includes M (M≥1 and an integer) backlight zones along the horizontal direction (X direction) and N (N≥1 and an integer) backlight zones along the vertical direction (Y direction). Figure 1 Assume M = 3, Y = 3, then Figure 1 The backlight module shown includes a total of 9 backlight zones, namely backlight zone 1, backlight zone 2, ..., backlight zone 9.

[0045] The display panel is used to display images, which include multiple partition images, each corresponding to a different backlight zone. Figure 2 This is a schematic diagram of a partitioned image provided in an embodiment of this application, such as... Figure 2 As shown, the image displayed on the display panel is divided into partitions using the same partitioning rules as the backlight partitioning, resulting in partitions corresponding to the backlight partitioning. Figure 1 The nine backlight zones shown correspond one-to-one with nine zone images, namely zone image 1, zone image 2, ..., zone image 9.

[0046] For any given partition image, the backlight partition in the backlight module that is at the same position as that partition image is taken as the corresponding backlight partition. For example... Figure 1 The backlight zone 1 shown is Figure 2 The partition image 1 shown corresponds to the backlight partition. It should be noted that the boundaries between different backlight partitions and between different partition images are virtual boundaries; in actual design, there are no physical boundaries.

[0047] Please see Figure 3 The backlight adjustment method in this application includes:

[0048] 100. Obtain the initial backlight data of each partition image, and determine the number of black field partitions in multiple partition images based on the initial backlight data of each partition image; wherein, the backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the black field partitions in the image are taken as the first region, and the other partition images in the image other than the black field partitions are taken as the second region.

[0049] 200. When the number of black screen zones is greater than the preset number, the backlight zones corresponding to other zones other than the black screen zones are illuminated according to the second backlight current; wherein, the second backlight current is a backlight current greater than the first backlight current.

[0050] In this application, when displaying a frame of image, the initial backlight data of that frame of image is obtained, that is, the initial backlight data of each partition image. Then, the number of black field partitions in each partition image is determined based on the initial backlight data of each partition image. It should be noted that the initial backlight data of each partition image refers to the backlight data actually required to display the image, while the driving current required to light up the backlight partition is the backlight current. In this embodiment, the driving current for driving the corresponding backlight partition to light up according to the initial backlight data of the partition image is defined as the first backlight current. If each partition image is different, then the first backlight current of the corresponding backlight partition of each partition image is also different. Lighting up the backlight partition under the corresponding backlight current can display the partition image of the corresponding brightness. If a certain area in the image is pure black, then that area is the black field in the image. In this embodiment, the so-called black field partition is the darkest part of the image. When the number of black field partitions is large, it will affect the display contrast between a small part of other partition images and the black field partitions.

[0051] In this application, the backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the second backlight current is a backlight current greater than the first backlight current. The black-field partitions in the image are designated as the first region of the entire image, and the other partition images outside the black-field partitions are designated as the second region of the entire image. When the number of black-field partitions in the image exceeds a preset number, the backlight partitions corresponding to each partition image in the second region are illuminated according to the second backlight current, which is equivalent to increasing the backlight current of the corresponding backlight partitions in the second region, thereby increasing the brightness of the corresponding backlight partitions in the second region. The backlight partitions corresponding to the black-field partitions are still driven by the first backlight current. Compared to using the first backlight current to drive all backlight partitions, this application increases the contrast of the entire image by increasing the backlight current of the other partition images outside the black-field partitions, i.e., the corresponding backlight partitions in the second region, thereby effectively improving the image display effect.

[0052] Please see Figure 4In some embodiments, the backlight adjustment method for the display screen further includes:

[0053] 300. When the backlight partition corresponding to the second area operates for a longer time than a preset time according to the second backlight current, the second backlight current is switched to the first backlight current to drive the backlight partition corresponding to the second area to light up.

[0054] Each backlight zone includes one or more LEDs. Since prolonged operation of LEDs under high backlight current can affect their lifespan, in this embodiment, if the backlight zone corresponding to the second region operates under the second backlight current for a longer than a preset time (e.g., 7 seconds), the second backlight current will be switched to the first backlight current. This reduces the backlight current of the backlight zones outside the black area. At this point, each backlight zone operates based on the backlight current corresponding to the initial backlight data, thereby extending the lifespan of the LEDs.

[0055] In some embodiments, the backlight adjustment method further includes: dividing the backlight current of the backlight module into a first current level A and a second current level B, such as... Figure 5 As shown, the backlight current corresponding to the first current level A can be 55mA, and the backlight current corresponding to the second current level B can be 65mA. Simultaneously, the first current level is marked as a first flag value, and the second current level is marked as a second flag value, with the first flag value being 0 and the second flag value being 1; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current. In this application, by dividing and marking the backlight current into levels, the corresponding backlight current can be directly configured according to the corresponding flag value when switching backlight currents, without needing to compare and set based on initial backlight data, thus facilitating transient adjustment.

[0056] Please see Figure 6 As one embodiment, step 200 in this application includes:

[0057] 210. Obtain the second flag value and configure the second backlight current according to the second flag value;

[0058] 220. Drive the backlight partition corresponding to the second region to light up according to the second backlight current.

[0059] In this application, the backlight current level can be set and marked. Then, the second backlight current is configured directly according to the second flag value, and the backlight partition corresponding to the second area is driven to light up through the second backlight current.

[0060] Please see Figure 7 As one embodiment, step 300 in this application includes:

[0061] 310. Obtain the first flag value and configure the first backlight current according to the first flag value;

[0062] 320. Drive the backlight partition corresponding to the second region to light up according to the first backlight current.

[0063] When the number of black screen zones exceeds a preset number, a second flag value of 1 is output for all backlight zones corresponding to the images outside the black screen zones. A second backlight current is configured based on this second flag value to drive the backlight zones corresponding to the images outside the black screen zones to illuminate. When the corresponding backlight zone has operated for a preset time according to the second backlight current, a first flag value of 0 is output, and the second backlight current is switched to the first backlight current based on this first flag value to drive the corresponding backlight zone to illuminate. This process dynamically and instantaneously brightens the corresponding backlight zone, increasing contrast, while also preventing the backlight zone from operating under high backlight current for extended periods, thus affecting its lifespan.

[0064] Please see Figure 8 In some embodiments, the backlight adjustment method of this application further includes:

[0065] 400. When the number of black screen zones is less than or equal to the preset number, the backlight zones corresponding to each zone image are illuminated according to the first backlight current.

[0066] In this application, the backlight current corresponding to each partition image is defined as the first backlight current, and the second backlight current is a backlight current greater than the first backlight current. When the number of black partitions in the image is greater than a preset number, the backlight partitions excluding the second region are driven to light up according to the second backlight current, which is equivalent to increasing the backlight current of the backlight partitions corresponding to other partition images, thereby increasing the brightness of the corresponding backlight partitions; while the backlight partitions corresponding to the black partitions are still driven by the first backlight current. Compared with driving all backlight partitions to light up all backlight partitions with the first backlight current, the contrast of the entire image can be increased, thereby effectively improving the image display effect.

[0067] When the number of black zones is less than or equal to the preset number, the number of black zones has little impact on the overall image contrast. The corresponding backlight zones can be directly driven to light up based on the first backlight current corresponding to the initial backlight data of the image. This avoids damaging the LED lifespan by having the backlight zones operate under high backlight current.

[0068] As one embodiment, the backlight adjustment method further includes: when the number of black field zones is less than or equal to a preset number, driving the backlight zones corresponding to each zone image to light up according to the first backlight current.

[0069] In this embodiment, when the number of black-area zones is greater than a preset number, a second flag value of 1 is output for all backlight zones corresponding to the image areas other than the black-area zones. A second backlight current is configured based on the second flag value of 1 to drive the backlight zones corresponding to the image areas other than the black-area zones to illuminate. When the corresponding backlight zone operates for a preset time according to the second backlight current, a first flag value of 0 is output, and the second backlight current is switched to a first backlight current based on the first flag value of 0 to drive the corresponding backlight zone to illuminate. During this process, the brightness of the corresponding backlight zone can be dynamically and instantaneously increased to enhance contrast, while also preventing the backlight zone from operating under high backlight current for extended periods, thus affecting its lifespan. When the number of black-area zones is less than or equal to the preset number, a first flag value of 0 is output for the backlight area of ​​each image area, and a first backlight current is configured based on the first flag value of 0 to drive each backlight zone to illuminate.

[0070] This application sets the backlight current level and selects the backlight current level of the backlight partition according to the number of black areas in the image. This allows for transient adjustment of the brightness of the backlight partition to adjust the image contrast without changing the initial backlight data, while also protecting the lifespan of the LEDs in the backlight partition.

[0071] Taking an initial backlight data of 70 for other partition images as an example: When the number of black partitions in the entire image is greater than the preset number, a second flag value of 1 is output for the partition image with an initial backlight data of 70. The second backlight current of the second current level is configured according to the second flag value of 1, and the duty cycle of the second backlight current is 70%. When the number of black partitions in the entire image is less than or equal to the preset number, a first flag value of 0 is output for the partition image with an initial backlight data of 70. The first backlight current of the first current level is configured according to the first flag value, and the duty cycle of the first backlight current is also 70%.

[0072] The first backlight current corresponds to a first current waveform, and the current value corresponding to the first backlight current is the peak current of the first current waveform. With the peak current remaining constant, if the first backlight current drives the current of a corresponding backlight zone, the effective current value corresponding to the first backlight current can be adjusted by changing the duty cycle of the first current waveform. The effective current value of the first backlight current is the product of the duty cycle and the corresponding peak current, thereby achieving brightness adjustment of the corresponding backlight zone and extending the lifespan of the LEDs in that backlight zone.

[0073] This application embodiment also provides a driver chip for a display screen. The display screen includes a display panel and a backlight module. The backlight module includes multiple backlight zones. The display panel is used to display images, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones. The driver chip is connected to at least one backlight zone and is used to execute the above-described backlight adjustment method for the display screen.

[0074] In this embodiment, multiple driver chips can be configured, each driver chip corresponding to drive at least one backlight zone. When the number of black areas in the image exceeds a preset number, the driver chip in this application drives the backlight zones excluding the second region to light up according to the second backlight current. This is equivalent to increasing the backlight current of the corresponding backlight zones in other image zones, thereby increasing the brightness of the corresponding backlight zones. Meanwhile, the backlight zones corresponding to the black areas are still driven by the first backlight current. Compared to using the first backlight current to drive all backlight zones, this increases the contrast of the entire image, thereby effectively improving the image display effect. Since the adjustment method for this display screen has been described in detail above, it will not be repeated here.

[0075] Please see Figure 9 This application embodiment also provides a display device, which includes a display screen, a core board 10, and a driver board 20; the display screen includes a backlight module and a display panel, the display panel is used to display images, the backlight module is disposed on a lamp board 30 and includes multiple backlight zones 31, the images include multiple zone images that correspond one-to-one with the multiple backlight zones 31; a main control chip 11 is disposed on the core board 10, and a control chip 21 and multiple drive circuits 22 are disposed on the driver board 20, the control chip 21 is connected to the main control chip 11 and the drive circuits 22 respectively, and each drive circuit 22 is connected to one or more backlight zones 31.

[0076] In specific implementation, the main control chip 11 is used to acquire the initial backlight data of each partition image, determine the number of black field partitions in multiple partition images based on the initial backlight data of each partition image, and output corresponding control signals according to the number of black field partitions; wherein, the backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current. The control chip 21 is used to configure the second backlight current of the driving circuit 22 corresponding to the second region according to the corresponding control signal when the number of black field partitions is greater than the preset number; the corresponding driving circuit 22 is used to drive the corresponding backlight partition 31 to light up according to the second backlight current.

[0077] In this embodiment, the main control chip 11 can be a SOC (System on Chip) chip. When the number of black areas in the image is greater than a preset number, the main control chip 11 controls the control chip 21 in the driver board 20 to configure a second backlight current for the driving circuits 22 other than the black areas. This allows the driving circuits 22 other than the black areas to drive the backlight areas 31 (excluding the second region) to light up according to the second backlight current. This is equivalent to increasing the backlight current of the corresponding backlight areas 31 in other image areas, thereby increasing the brightness of the corresponding backlight areas 31. For the driving circuits 22 corresponding to the black areas, the main control chip 11 controls the control chip 21 in the driver board 20 to configure a first backlight current for them. Compared to using the first backlight current to drive all backlight areas 31 to light up, this application increases the contrast of the entire image by increasing the backlight current of the corresponding backlight areas 31 in the second region, thereby effectively improving the image display effect.

[0078] Of course, in some embodiments, the control chip 21 can also directly obtain the initial backlight data of each partition image output by the main control chip 11, and determine the number of black field partitions in multiple partition images based on the initial backlight data.

[0079] In one embodiment, the main control chip 11 is further configured to divide the backlight current of the backlight module into a first current level and a second current level, and mark the first current level as a first flag value and the second current level as a second flag value; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current. In this embodiment, the backlight current is divided into two levels and marked. When it is determined which backlight current level is needed, the backlight current can be switched simply by sending the corresponding flag value to the control chip 21, so as to realize the transient adjustment process.

[0080] Specifically, in this embodiment, the main control chip 11 is used to output a second flag value to the control chip 21 when the number of black field partitions is greater than a preset number; the control chip 21 is also used to configure the corresponding driving circuit 22 with a second backlight current according to the second flag value; the main control chip 11 is also used to output a first flag value when the corresponding driving circuit 22 operates for a preset time according to the second backlight current, and the control chip 21 is also used to configure the corresponding driving circuit 22 from the second backlight current to the first backlight current according to the first flag value.

[0081] When the number of black screen zones exceeds a preset number, the main control chip 11 outputs a second flag value 1 for all backlight zones 31 corresponding to the image zones other than the black screen zones. The control chip 21 then configures the corresponding drive circuit 22 with a second backlight current based on the second flag value 1, so that the backlight zones 31 corresponding to the image zones other than the black screen zones are lit up according to the second backlight current. When the corresponding drive circuit 22 has been working for a preset time according to the second backlight current, the main control chip 11 outputs a first flag value 0. The control chip 21 then configures the corresponding drive circuit 22 from the second backlight current to the first backlight current based on the first flag value 0. In this process, the brightness of the corresponding backlight zone 31 can be dynamically and instantaneously increased to enhance the contrast, while also preventing the backlight zone 31 from working under high backlight current for a long time, which would affect its lifespan.

[0082] In some embodiments, the main control chip 11 is further configured to output a first flag value to the control chip 21 when the number of black screen partitions is less than or equal to a preset number; the control chip 21 configures a first backlight current for each driving circuit 22 according to the first flag value; each driving circuit 22 is configured to drive the corresponding backlight partition 31 to light up according to the first backlight current. In this embodiment, when the number of black screen partitions is less than or equal to the preset number, the number of black screen partitions has a small impact on the contrast of the overall image, and the corresponding backlight partition 31 can be driven to light up directly according to the first backlight current corresponding to the initial backlight data of the image; the main control chip 11 directly sends the first flag value to the control chip 21, the control chip 21 configures the first backlight current for the corresponding driving circuit 22 according to the first flag value, and the driving circuit 22 drives the corresponding backlight partition 31 to light up according to the first backlight current, thereby avoiding damage to the LED lifespan caused by the backlight partition 31 operating under high backlight current.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] The backlight adjustment method for the display screen provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solution and core idea of ​​this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for adjusting the backlight of a display screen, characterized in that, The display screen includes a display panel and a backlight module that provides backlight to the display panel. The backlight module includes multiple backlight zones. The display panel is used to display images, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones. The backlight adjustment method includes: The initial backlight data of each partition image is obtained, and the number of black field partitions in the plurality of partition images is determined according to the initial backlight data of each partition image; wherein, the backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the black field partition in the image is taken as the first region, and the other partition images in the image other than the black field partition are taken as the second region. When the number of black field zones is greater than a preset number, the backlight zone corresponding to the second region is driven to light up according to the second backlight current; wherein, the second backlight current is a backlight current greater than the first backlight current.

2. The backlight adjustment method for a display screen according to claim 1, characterized in that, The backlight adjustment method further includes: When the backlight partition corresponding to the second region operates for a time longer than a preset time according to the second backlight current, the second backlight current is switched to the first backlight current to drive the backlight partition corresponding to the second region to light up.

3. The backlight adjustment method for a display screen according to claim 2, characterized in that, The backlight adjustment method further includes: The backlight current of the backlight module is divided into a first current level and a second current level, and the first current level is marked as a first flag value, and the second current level is marked as a second flag value; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current.

4. The backlight adjustment method for a display screen according to claim 3, characterized in that, The step of driving the backlight partition corresponding to the second region to light up according to the second backlight current includes: Obtain the second flag value, and configure the second backlight current according to the second flag value; The backlight partition corresponding to the second region is illuminated according to the second backlight current.

5. The backlight adjustment method for a display screen according to claim 3, characterized in that, The step of switching the second backlight current to the first backlight current to drive the backlight partition corresponding to the second region to light up includes: Obtain the first flag value and configure the first backlight current according to the first flag value; The backlight partition corresponding to the second region is illuminated according to the first backlight current.

6. The backlight adjustment method for a display screen according to claim 3, characterized in that, The backlight adjustment method further includes: When the number of black field partitions is less than or equal to the preset number, the backlight partitions corresponding to each partition image are illuminated according to the first backlight current.

7. The backlight adjustment method for a display screen according to claim 6, characterized in that, The step of driving the backlight partitions corresponding to each partition image to light up according to the first backlight current includes: Obtain the first flag value, and configure the first backlight current according to the first flag value; The backlight partitions corresponding to each partition image are illuminated according to the first backlight current.

8. A driver chip for a display screen, characterized in that, The display screen includes a display panel and a backlight module. The backlight module includes multiple backlight zones. The display panel is used to display images, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones. The driving chip is connected to at least one backlight zone and is used to perform the backlight adjustment method of the display screen as described in any one of claims 1-7.

9. A display device, characterized in that, The display device includes: The display screen includes a backlight module and a display panel, the display panel is used to display images, the backlight module includes multiple backlight zones, and the images include multiple zone images that correspond one-to-one with the multiple backlight zones; The main control chip is provided on the main control board. The main control chip is used to acquire the initial backlight data of each partition image, determine the number of black field partitions in multiple partition images based on the initial backlight data of each partition image, and output a corresponding control signal based on the number of black field partitions. The backlight current corresponding to the initial backlight data of each partition image is defined as the first backlight current, and the black field partitions in the image are defined as the first region, and the other partition images in the image other than the black field partitions are defined as the second region. A driver board is provided with a control chip and multiple driver circuits. The control chip is connected to the main control chip and the driver circuits respectively. Each driver circuit is connected to one or more backlight zones. The control chip is used to configure a second backlight current for the driver circuit corresponding to the second region according to the corresponding control signal when the number of black field zones is greater than a preset number. The corresponding driver circuit is used to drive the corresponding backlight zone to light up according to the second backlight current. The second backlight current is a backlight current greater than the first backlight current.

10. The display device according to claim 9, characterized in that, The main control chip is also used to divide the backlight current of the backlight module into a first current level and a second current level, and mark the first current level as a first flag value and the second current level as a second flag value; wherein, the backlight current corresponding to the first current level is the first backlight current, and the backlight current corresponding to the second current level is the second backlight current.

11. The display device according to claim 10, characterized in that, The main control chip is used to output the second flag value to the control chip when the number of black field partitions is greater than the preset number; the control chip is also used to configure the second backlight current of the corresponding driving circuit according to the second flag value.

12. The display device according to claim 10, characterized in that, The main control chip is also used to output the first flag value when the corresponding driving circuit operates for a preset time according to the second backlight current, and the control chip is also used to configure the corresponding driving circuit from the second backlight current to the first backlight current according to the first flag value.

13. The display device according to claim 10, characterized in that, The main control chip is also used to output the first flag value to the control chip when the number of black field partitions is less than or equal to the preset number; the control chip configures the first backlight current for each of the driving circuits according to the first flag value; Each of the driving circuits is used to drive the corresponding backlight zone to light up according to the first backlight current.

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