Display apparatus, method, unit and storage medium for controlling backlight brightness thereof

Abstract

The application provides a display device, a backlight brightness control method, a unit and a storage medium, comprising: obtaining a characteristic brightness of a to-be-controlled display partition in a plurality of display partitions and an actual brightness of the to-be-controlled display partition under a current environment; determining a difference between the actual brightness of the to-be-controlled display partition and the characteristic brightness of the to-be-controlled display partition; and sending a first control instruction to a backlight module based on a feedback signal obtained by comparing the difference with a preset threshold corresponding to the to-be-controlled display partition under the current environment, so that the backlight module controls the brightness of a backlight partition corresponding to the to-be-controlled display partition. In this way, the degree and situation of the influence of ambient light on different display partitions can be adjusted, and finally the brightness of all display partitions is not affected by the external environment, thereby improving the display effect.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display device and its backlight brightness control method, unit, and storage medium. Background Technology

[0002] In recent years, the combination of Liquid Crystal Display (LCD) and Light Emitting Diode (LED) backlight area adjustment technology has given LCD display technology advantages comparable to newer flat panel display technologies such as OLED, featuring ultra-high resolution, wide color gamut, high contrast, high brightness, high dynamic range, and low power consumption.

[0003] However, large-sized LCDs are easily affected by ambient light, which can cause localized projection and reflection, resulting in poor display quality. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a display device and a method, apparatus and storage medium for controlling the backlight brightness of LCDs, which solve or at least partially solve the technical problem that LCDs are susceptible to the influence of ambient light and thus have poor display effects.

[0005] In a first aspect, the present invention provides a method for controlling the backlight brightness of a display device, the display device comprising a display panel and a backlight module, the display panel comprising a plurality of display zones, and the backlight module comprising a plurality of backlight zones corresponding one-to-one with the plurality of display zones, the method comprising:

[0006] The characteristic brightness of the display partition to be controlled and the actual brightness of the display partition to be controlled under the current environment are obtained from the plurality of display partitions; wherein, the characteristic brightness of the display partition to be controlled is the brightness of the display partition to be controlled under a preset environment;

[0007] Determine the difference between the actual brightness of the display zone to be controlled and the characteristic brightness of the display zone to be controlled;

[0008] Based on the feedback signal obtained by comparing the difference with the preset threshold corresponding to the display partition to be controlled in the current environment, a first control command is sent to the backlight module so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled.

[0009] Furthermore, in the aforementioned method for controlling the backlight brightness of a display device, obtaining the characteristic brightness of the display zone to be controlled includes:

[0010] Obtain the current video data stream and the current backlight control data of the display partition to be controlled under the current environment;

[0011] The characteristic brightness of the display zone to be controlled is determined based on the current video data stream and the current backlight control data.

[0012] Furthermore, in the backlight brightness control method of the display device described above, determining the characteristic brightness of the display zone to be controlled based on the current video data stream and the current backlight control data includes:

[0013] Based on the current video data stream, determine the current number of sub-pixels that are currently enabled in the display partition to be controlled;

[0014] Based on the current backlight control data, determine the current backlight brightness of the display zone to be controlled;

[0015] The characteristic brightness of the display zone is determined based on the current number of activated sub-pixels, the current backlight brightness, and a preset characteristic brightness relationship library.

[0016] The feature brightness relationship library includes the number of sub-pixels turned on in the display partition to be controlled under a preset environment, the correlation between the backlight brightness of the display partition to be controlled under the preset environment and the feature brightness of the display partition to be controlled under the preset environment.

[0017] Furthermore, in the aforementioned method for controlling the backlight brightness of a display device, obtaining the actual brightness of the display zone to be controlled among the plurality of display zones in the current environment includes:

[0018] Receive a brightness signal detected by a brightness detection device in the display area to be controlled, wherein the brightness detection device is disposed on the surface of the display panel away from the touch module;

[0019] Based on the brightness signal, the actual brightness of the display zone to be controlled is determined.

[0020] Furthermore, in the aforementioned method for controlling the backlight brightness of the display device, the brightness detection device is:

[0021] A photoresistor material layer is laid on each of the aforementioned display zones; or

[0022] Photoresistors are individually installed on each display zone.

[0023] Furthermore, the method for controlling the backlight brightness of the display device described above also includes:

[0024] Retrieve the preset threshold corresponding to the display partition to be controlled in the current environment from the storage medium; compare the difference with the preset threshold.

[0025] Furthermore, the method for controlling the backlight brightness of the display device described above also includes:

[0026] The difference is input to the first input of the comparator.

[0027] Input the preset threshold corresponding to the display partition to be controlled into the second input terminal of the comparator.

[0028] Furthermore, in the aforementioned method for controlling the backlight brightness of the display device, the step of sending a first control command to the backlight module based on the feedback signal obtained by comparing the difference with a preset threshold corresponding to the controllable display zone in the current environment includes:

[0029] In response to a comparison result where the difference is greater than the preset threshold, a dimming command is sent to the backlight module to cause the backlight module to change the brightness of the backlight zone corresponding to the display zone to be controlled.

[0030] Further, in the above-described method for controlling the backlight brightness of a display device, the step of sending a dimming command to the backlight module in response to a comparison result that the difference is greater than the preset threshold, so that the backlight module changes the brightness of the backlight zone corresponding to the display zone to be controlled, includes:

[0031] If the comparison results for multiple display zones to be controlled are all greater than the preset threshold, a dimming command is sent to the backlight module so that the backlight module changes the brightness of the backlight zone corresponding to the display zone to be controlled according to the order in which the comparison results are generated.

[0032] Furthermore, in the aforementioned method for controlling the backlight brightness of a display device, after sending a first control command to the backlight module to control the brightness of the backlight zone corresponding to the display zone to be controlled, the method further includes:

[0033] Receive a detection signal, wherein the detection signal characterizes whether the brightness interference of the display zone to be controlled has been eliminated;

[0034] If the detection signal indicates that the interference has been eliminated, a second control command is sent to the backlight module to restore the brightness of the backlight zone corresponding to the display zone to be controlled.

[0035] Furthermore, in the backlight brightness control method of the display device described above, if the actual brightness change value of the display zone to be controlled is within a preset range, the detection signal indicates that the interference has not been eliminated;

[0036] If the actual brightness change of the display zone to be controlled is outside the preset range, the detection signal indicates that the interference has been eliminated.

[0037] Secondly, the present invention provides a backlight brightness control unit, the backlight brightness control unit including a processor and a memory, the memory being adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to perform the backlight brightness control method described above.

[0038] Thirdly, the present invention provides a computer-readable storage medium storing a plurality of program codes adapted to be loaded and run by a processor to perform the backlight brightness control method described above.

[0039] Thirdly, the present invention provides a display device, the display device comprising...

[0040] The display panel includes multiple display zones;

[0041] The backlight module includes multiple backlight zones that correspond one-to-one with the multiple display zones;

[0042] The control unit described above;

[0043] A brightness detection device is disposed on the surface of the display panel away from the touch module.

[0044] Furthermore, the aforementioned display device further includes:

[0045] A comparator is used to compare the difference with a preset threshold corresponding to the display partition to be controlled in the current environment.

[0046] Furthermore, in the display device described above, there are multiple comparators, each corresponding to one of the number of display partitions, used to compare the difference between the display partitions with a preset threshold.

[0047] Furthermore, in the aforementioned display device, both the comparator and the control unit are disposed in the bonding area of ​​the display panel.

[0048] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0049] In implementing the technical solution of this invention, by acquiring the characteristic brightness of the display partition to be controlled and the actual brightness of the display partition to be controlled under the current environment, and based on the feedback signal obtained by the difference between the two and the preset threshold corresponding to the display partition to be controlled under the current environment, a first control command is sent to the backlight module so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled. In this way, adjustments can be made according to the degree and situation of the influence of ambient light on different display partitions, so that the brightness of all display partitions is not affected by the external environment, thereby improving the display effect. Attached Figure Description

[0050] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0051] Figure 1 This is a flowchart illustrating the backlight brightness control method of a display device according to an embodiment of the present invention;

[0052] Figure 2 It is a specific representation of a feature brightness relational database;

[0053] Figure 3 This is a schematic diagram illustrating the principle of using a comparator to control backlight brightness.

[0054] Figure 4 This is a main structural block diagram of a backlight brightness control unit according to an embodiment of this application;

[0055] Figure 5 This is a planar schematic diagram of a display panel with a layer of photoresistor material laid on it. Detailed Implementation

[0056] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] In the description of this invention, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, in this invention, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they may refer to a direct connection or an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] An LCD typically includes: a display panel, a backlight module for providing backlight to the display panel, and a control unit for controlling the backlight module to emit light. The backlight module can be divided into multiple backlight zones, and the display panel can be divided into display zones corresponding to the backlight zones. The control unit can control the backlight zone corresponding to each display zone to emit light based on the brightness of the sub-pixels in that display zone, thereby providing backlight to that display zone.

[0059] However, large-sized LCDs are easily affected by ambient light, which can cause localized projection and reflection, resulting in poor display quality.

[0060] Therefore, in order to solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0061] Figure 1 This is a flowchart illustrating the backlight brightness control method of a display device according to an embodiment of the present invention, as shown below. Figure 1 As shown, the backlight brightness control method of the display device in this embodiment may specifically include steps 101 to 103.

[0062] Step 101: Obtain the characteristic brightness of the display partition to be controlled and the actual brightness of the display partition to be controlled in the current environment among multiple display partitions;

[0063] In a specific implementation, the display device can be set to a preset environment and display corresponding images based on different set display control parameters. This allows the determination of the brightness of each display zone corresponding to each display control parameter under the preset environment. This brightness is defined as the characteristic brightness, and each display control parameter and its corresponding characteristic brightness are associated to construct a characteristic brightness relational library. The display control parameters can include the number of sub-pixels enabled and the backlight brightness of the sub-pixels in each display zone under the preset environment. The number of enabled sub-pixels in each display zone can be obtained by parsing the video data stream of each display zone, and the backlight brightness of the sub-pixels in each display zone can be obtained by parsing the backlight control data of each display zone. The preset environment is a dark environment, which minimizes the influence of ambient light, ensuring that each display zone is only related to changes in its own material brightness characteristics, thus obtaining a more accurate characteristic brightness.

[0064] In a specific implementation, when the display device is placed in the current environment for actual display, it can acquire the current video data stream and the current backlight control data of the display partition to be controlled in the current environment, and determine the characteristic brightness of the display partition to be controlled based on the current video data stream and the current backlight control data.

[0065] Specifically, the characteristic brightness of the display zone to be controlled can be determined by following these steps:

[0066] a. Determine the current number of enabled sub-pixels in the display partition to be controlled based on the current video data stream;

[0067] In a specific implementation, pixel data for each frame can be read from the current video data stream of the controllable display partition of the input display panel, and then the number of sub-pixels to be enabled can be determined for each frame of pixel data.

[0068] b. Determine the current backlight brightness of the display zone to be controlled based on the current backlight control data;

[0069] In a specific implementation process, when the display device is placed in the current environment for actual display, it sends relevant backlight control data to the display module. This backlight control data usually includes information such as the backlight brightness value and zone coordinates of each display zone. Therefore, the current backlight brightness of the display zone to be controlled can be parsed from the current backlight control data.

[0070] c. Determine the characteristic brightness of the display zone based on the current number of activated sub-pixels, the current backlight brightness, and a preset characteristic brightness relationship library;

[0071] After obtaining the current number of sub-pixels turned on and the current backlight brightness, it can be matched with a preset feature brightness relationship library. Based on the relationship between the number of sub-pixels turned on in the display partition to be controlled under the preset environment, the backlight brightness of the display partition to be controlled under the preset environment, and the feature brightness of the display partition to be controlled under the preset environment, the feature brightness relationship library can determine the feature brightness of the display partition to be controlled.

[0072] The specific presentation form of the feature brightness relationship library can be a straight line, curve, or table formed by the number of sub-pixels turned on in the display partition to be controlled under the preset environment, the backlight brightness of the display partition to be controlled under the preset environment, and the feature brightness of the display partition to be controlled under the preset environment. This embodiment does not impose specific limitations.

[0073] Figure 2 It is a specific representation of a feature brightness relational library. Figure 2 The following explanation uses a straight line formed by the number of sub-pixels turned on in the controllable display partition under a preset environment, the backlight brightness of the controllable display partition under a preset environment, and the characteristic brightness of the controllable display partition under a preset environment as an example. Figure 2 The horizontal axis represents the backlight brightness, the vertical axis represents the number of sub-pixels that are turned on, and the straight line represents the feature brightness determined by both the backlight brightness and the number of sub-pixels that are turned on.

[0074] In one specific implementation, a brightness detection device can be set on the surface of the display panel away from the touch module. The brightness detection device detects the brightness signal of each display zone. In this way, after receiving the brightness signal detected by the brightness detection device in the display zone to be controlled, the actual brightness of the display zone to be controlled can be determined based on the brightness signal.

[0075] Specifically, the brightness detection device can be a photoresistor material layer laid on each of the display zones; or, the brightness detection device can be a photoresistor device separately set on each display zone. The brightness signal detected by the brightness detection device can be a resistance value signal. Upon receiving the resistance value signal, the brightness corresponding to that resistance value signal can be obtained based on the correlation between the resistance value and the brightness.

[0076] Step 102: Determine the difference between the actual brightness of the display zone to be controlled and the characteristic brightness of the display zone to be controlled;

[0077] In a specific implementation process, when the display device moves from one environment to another, the brightness change of each display zone is usually not very different. Therefore, the brightness change of each display zone can be used as the basis for whether it is affected by the light of the current environment. In this way, the actual brightness of the display zone to be controlled can be compared with the characteristic brightness of the display zone to be controlled, and the difference between the two can be obtained, thereby obtaining the brightness change of the display zone to be controlled.

[0078] Step 103: Based on the feedback signal obtained by comparing the difference with the preset threshold corresponding to the display partition to be controlled in the current environment, send a first control command to the backlight module so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled.

[0079] In a specific implementation, threshold values ​​for allowable brightness changes can be set for different environments. The higher the brightness of the environment, the larger the allowable brightness change threshold; conversely, the lower the brightness of the environment, the smaller the allowable brightness change threshold. The comparison result between the difference between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled, and the preset threshold value corresponding to the display partition to be controlled in the current environment, can be obtained in the following two ways:

[0080] The first method involves retrieving a preset threshold value corresponding to the display zone to be controlled under the current environment from the storage medium. This preset threshold value is then compared with the difference between the actual brightness of the display zone and its characteristic brightness, yielding a feedback signal for the comparison result. In other words, a corresponding program can be set up to calculate the difference between the preset threshold and the value using software, and generate a corresponding feedback signal. This allows for quantitative adjustments to the backlight zone brightness in subsequent adjustments.

[0081] The second method involves setting up a comparator, inputting the difference between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled into the first input terminal of the comparator, and inputting the preset threshold corresponding to the display partition to be controlled into the second input terminal of the comparator. After comparing the two using the comparator, the feedback signal corresponding to the comparison result is output for feedback until the difference between the two is less than the preset threshold.

[0082] After receiving the feedback signal, a first control command can be sent to the backlight module based on the feedback signal, so that the backlight module controls the brightness of the backlight zone corresponding to the display zone to be controlled.

[0083] Specifically, when the feedback signal indicates that the difference between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled is greater than the preset threshold corresponding to the display partition to be controlled, it means that the display partition to be controlled is greatly affected by the ambient light in the current environment. In this case, a first control command can be generated and sent to the backlight module. In this way, the backlight module can control the brightness of the backlight partition corresponding to the display partition to be controlled, thereby adjusting the brightness of the display partition to be controlled.

[0084] Figure 3 This is a schematic diagram illustrating the principle of using a comparator to control backlight brightness, such as... Figure 3 As shown, after the photoresistor material layer senses the light of each display zone, the resistance of the photoresistor material corresponding to each display zone changes, and the resistance value rn corresponding to each display zone can be obtained. Then, the resistance value corresponding to each display zone is converted into a voltage value as the actual brightness LAn corresponding to each display zone. Then, the difference ΔLAn between the actual brightness LAn and the corresponding characteristic brightness of each display zone is calculated and sequentially input into the first input terminal of the comparator. After the comparator compares ΔLAn with a preset threshold, it feeds back the feedback signal corresponding to the comparison result so as to send a first control command to the backlight module, so that the backlight module controls the brightness of the backlight zone corresponding to the display zone to be controlled. Then, the photoresistor material layer further feeds back the actual brightness LAn corresponding to each display zone. Finally, all ΔLAn are less than the preset threshold.

[0085] The backlight brightness control method of the display device in this embodiment obtains the characteristic brightness of the display partition to be controlled and the actual brightness of the display partition to be controlled under the current environment among multiple display partitions, and sends a first control command to the backlight module based on the feedback signal obtained by the difference between the two and the preset threshold corresponding to the display partition to be controlled under the current environment. This enables the backlight module to control the brightness of the backlight partition corresponding to the display partition to be controlled. In this way, adjustments can be made according to the degree and situation of the influence of ambient light on different display partitions, so that the brightness of all display partitions is not affected by the external environment, thereby improving the display effect.

[0086] In a specific implementation, the influence of ambient light may be temporary. Therefore, after sending a first control command to the backlight module to control the brightness of the backlight zone corresponding to the display zone to be controlled, a detection signal can be received to characterize whether the brightness interference of the display zone to be controlled has been eliminated. If the detection signal indicates that the interference has been eliminated, a second control command is sent to the backlight module to restore the brightness of the backlight zone corresponding to the display zone to be controlled.

[0087] In a specific implementation, if the interference is not eliminated, the actual brightness of the display area to be controlled will still be determined by the ambient light and the brightness of the backlight area corresponding to the display area to be controlled, and the actual brightness of the display area to be controlled will not change significantly. However, if the interference is eliminated, the actual brightness of the display area to be controlled will be determined by the brightness of the backlight area corresponding to the display area to be controlled, and the actual brightness of the display area to be controlled will change significantly. Therefore, if the change value of the actual brightness of the display area to be controlled corresponding to the detection signal is within a preset range, the detection signal indicates that the interference has not been eliminated, and the brightness of the backlight area corresponding to the display area to be controlled can be maintained. If the change value of the actual brightness of the display area to be controlled is outside the preset range, the detection signal indicates that the interference has been eliminated, and a second control command is sent to the backlight module to restore the brightness of the backlight area corresponding to the display area to be controlled.

[0088] Furthermore, the present invention also provides a control unit for backlight brightness.

[0089] See appendix Figure 4 , Figure 4 This is a main structural block diagram of a backlight brightness control unit according to an embodiment of this application. Figure 4 As shown, the backlight brightness control unit in this embodiment may include a processor 41 and a memory 42.

[0090] The backlight brightness control unit includes a processor 41 and a memory 42.

[0091] The memory 42 can be configured to store a program for executing the backlight brightness control method of the above-described method embodiments, and the processor 41 can be configured to execute the program in the memory 42, which includes, but is not limited to, a program for executing the backlight brightness control method of the above-described method embodiments. For ease of explanation, only the parts related to the embodiments of this application are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of this application. The backlight brightness control device can be a control device comprising various electronic devices.

[0092] In a specific implementation, there can be multiple memories 42 and processors 41. The program executing the backlight brightness control method of the above method embodiment can be divided into multiple subroutines. Each subroutine can be loaded and run by the processor 41 to execute different steps of the backlight brightness control method of the above method embodiment. Specifically, each subroutine can be stored in a different memory 42, and each processor 41 can be configured to execute programs in one or more memories 42 to jointly implement the backlight brightness control method of the above method embodiment. That is, each processor 41 executes different steps of the backlight brightness control method of the above method embodiment to jointly implement the backlight brightness control method of the above method embodiment.

[0093] The aforementioned multiple processors 41 can be processors deployed on the same device. For example, the device can be a high-performance device composed of multiple processors, and the multiple processors 41 can be processors configured on that high-performance device. Alternatively, the aforementioned multiple processors 41 can also be processors deployed on different devices. For example, the device can be a server cluster, and the multiple processors 41 can be processors on different servers within the server cluster.

[0094] Furthermore, this application also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to this application, the computer-readable storage medium can be configured to store a program that performs the backlight brightness control method of the above-described method embodiments. This program can be loaded and run by a processor to implement the backlight brightness control method. For ease of explanation, only the parts related to the embodiments of this application are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of this application. The computer-readable storage medium can be a memory device formed by various electronic devices. Optionally, in the embodiments of this application, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0095] Furthermore, the present invention also provides a display device. The display device includes a display panel, a backlight module, a brightness detection device, and a control unit. The display panel and the backlight module are disposed opposite to each other, and the brightness detection device is disposed on the surface of the display panel away from the touch module. The display panel includes multiple display zones, and the backlight module includes multiple backlight zones corresponding one-to-one with the multiple display zones. The brightness detection device can be a photoresistive material layer, deposited on each of the display zones, and led out from the display area of ​​the display panel to the edge of the visible area of ​​the display panel via traces, and then led to the control unit via an MFPC.

[0096] Figure 5 This is a planar schematic diagram of a display panel with a layer of photoresistive material laid on it. For example... Figure 5As shown, the surrounding black area can be the edge of the visible area of ​​the display panel, and the rest is the display area of ​​the display panel. The photoresistor material layer is represented by the equivalent resistance in each display partition (only part of the equivalent resistance is shown in the figure). One end of the equivalent resistance is connected to the edge of the visible area and led to the control unit through the MFPC (not shown in the figure).

[0097] In one specific implementation, the display device further includes a comparator. This comparator compares the difference with a preset threshold corresponding to the controllable display zone in the current environment. Both the comparator and the control unit can be located in the binding area of ​​the display panel.

[0098] It should be noted that the comparator can have multiple data points, each corresponding to a specific number of display partitions. It is used to compare the differences between the display partitions with a preset threshold, so as to simultaneously detect whether multiple display partitions are affected by the ambient light.

[0099] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for controlling the backlight brightness of a display device, characterized in that, The display device includes a display panel and a backlight module. The display panel includes multiple display zones, and the backlight module includes multiple backlight zones corresponding one-to-one with the multiple display zones. The method includes: The characteristic brightness of the display partition to be controlled and the actual brightness of the display partition to be controlled under the current environment are obtained from the plurality of display partitions; wherein, the characteristic brightness of the display partition to be controlled is the brightness of the display partition to be controlled under a preset environment; the preset environment eliminates the influence of ambient light on the brightness of the display partition; Determine the difference between the actual brightness of the display zone to be controlled and the characteristic brightness of the display zone to be controlled; Based on the feedback signal obtained by comparing the difference with the preset threshold corresponding to the display partition to be controlled in the current environment, a first control command is sent to the backlight module so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled.

2. The method for controlling the backlight brightness of a display device according to claim 1, characterized in that, Obtaining the characteristic brightness of the display zone to be controlled includes: Obtain the current video data stream and the current backlight control data of the display partition to be controlled under the current environment; The characteristic brightness of the display zone to be controlled is determined based on the current video data stream and the current backlight control data.

3. The method for controlling the backlight brightness of a display device according to claim 2, characterized in that, Based on the current video data stream and the current backlight control data, determine the characteristic brightness of the display zone to be controlled, including: Based on the current video data stream, determine the current number of sub-pixels that are currently enabled in the display partition to be controlled; Based on the current backlight control data, determine the current backlight brightness of the display zone to be controlled; The characteristic brightness of the display zone is determined based on the current number of activated sub-pixels, the current backlight brightness, and a preset characteristic brightness relationship library. The feature brightness relationship library includes the number of sub-pixels turned on in the display partition to be controlled under a preset environment, the correlation between the backlight brightness of the display partition to be controlled under the preset environment and the feature brightness of the display partition to be controlled under the preset environment.

4. The method for controlling the backlight brightness of a display device according to claim 1, characterized in that, Obtaining the actual brightness of the display partition to be controlled among the multiple display partitions in the current environment includes: The display panel receives a brightness signal detected by a brightness detection device in the display area to be controlled, wherein the brightness detection device is disposed on the surface of the display panel away from the backlight module. Based on the brightness signal, the actual brightness of the display zone to be controlled is determined.

5. The method for controlling the backlight brightness of a display device according to claim 4, characterized in that, The brightness detection device is: A photoresistor material layer is laid on each of the aforementioned display zones; or Photoresistors are individually installed on each display zone.

6. The method for controlling the backlight brightness of a display device according to claim 1, characterized in that, The method further includes: Retrieve the preset threshold corresponding to the display partition to be controlled in the current environment from the storage medium; The difference is compared with the preset threshold.

7. The method for controlling the backlight brightness of a display device according to claim 1, characterized in that, The method further includes: The difference is input to the first input of the comparator. Input the preset threshold corresponding to the display partition to be controlled into the second input terminal of the comparator.

8. The method for controlling the backlight brightness of a display device according to claim 6 or 7, characterized in that, The feedback signal obtained based on the comparison result between the difference and the preset threshold corresponding to the controllable display zone in the current environment sends a first control command to the backlight module, including: In response to a comparison result where the difference is greater than the preset threshold, a dimming command is sent to the backlight module to cause the backlight module to change the brightness of the backlight zone corresponding to the display zone to be controlled.

9. The method for controlling the backlight brightness of a display device according to claim 8, characterized in that, The step of responding to a comparison result where the difference is greater than the preset threshold by sending a dimming command to the backlight module to cause the backlight module to change the brightness of the backlight zone corresponding to the display zone to be controlled includes: If the comparison results for multiple display zones to be controlled are all greater than the preset threshold, a dimming command is sent to the backlight module so that the backlight module changes the brightness of the backlight zone corresponding to the display zone to be controlled according to the order in which the comparison results are generated.

10. The method for controlling the backlight brightness of a display device according to claim 1, characterized in that, After sending a first control command to the backlight module to control the brightness of the backlight zone corresponding to the display zone to be controlled, the method further includes: Receive a detection signal, wherein the detection signal characterizes whether the brightness interference of the display zone to be controlled has been eliminated; If the detection signal indicates that the interference has been eliminated, a second control command is sent to the backlight module to restore the brightness of the backlight zone corresponding to the display zone to be controlled.

11. The method for controlling the backlight brightness of a display device according to claim 10, characterized in that, If the actual brightness change of the display zone to be controlled is within a preset range, the detection signal indicates that the interference has not been eliminated; If the actual brightness change of the display zone to be controlled is outside the preset range, the detection signal indicates that the interference has been eliminated.

12. A backlight brightness control unit, characterized in that, The device includes a processor and a memory, the memory being adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to perform the backlight brightness control method according to any one of claims 1 to 11.

13. A computer-readable storage medium, characterized in that, The system stores multiple lines of program code, which are adapted to be loaded and run by a processor to perform the backlight brightness control method according to any one of claims 1 to 11.

14. A display device, characterized in that, include The display panel includes multiple display zones; The backlight module includes multiple backlight zones that correspond one-to-one with the multiple display zones; The control unit as claimed in claim 12; A brightness detection device is disposed on the surface of the display panel away from the backlight module.

15. The display device according to claim 14, further comprising: A comparator is used to compare the difference with a preset threshold corresponding to the display partition to be controlled in the current environment.

16. The display device according to claim 15, characterized in that, There are multiple comparators, each corresponding to one of the display partitions, used to compare the difference between the display partitions with a preset threshold.

17. The display device according to claim 15 or 16, characterized in that, Both the comparator and the control unit are located in the bonding area of ​​the display panel.

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