Backlight control method of display device, backlight controller and related device

Abstract

The present invention discloses a backlight control method, a backlight controller and related devices for a display device. The method determines the overlap area between the effective light radiation area and the gain area of ​​each target backlight partition by acquiring the gain area corresponding to the received display signal in the display panel, and adjusts the backlight brightness of the target backlight partition according to the overlap area and a preset maximum halo index. The target backlight partition is a backlight partition related to the gain area in the backlight module. The present invention controls the brightness of the corresponding target backlight partition based on the overlap area between the effective light radiation area and the gain area of ​​each target backlight partition, thereby reducing the influence of halo and improving user experience while satisfying the display as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a backlight control method for a display device, a backlight controller and related devices. Background Art

[0002] With the rapid advancement of liquid crystal display (LCD) manufacturing technology and its advantages such as low radiation, low power consumption and small size, it has been widely used in various electronic products such as televisions, computers, mobile phones, etc.

[0003] Liquid crystal displays usually include: a display panel, a backlight module for providing backlight to the display panel, and a backlight controller for controlling the light emission of the backlight module. Among them, the backlight module can be divided into multiple backlight partitions, and the display panel can be divided into multiple display partitions, and the multiple backlight partitions correspond to the multiple display partitions one by one. At present, the backlight module can be divided into dozens or hundreds of backlight partitions, or even into thousands of mini backlight partitions. The backlight controller can control the corresponding backlight partition to emit light to provide backlight to the corresponding display partition.

[0004] However, since the display panel of the LCD screen is not completely opaque, some halo phenomena will appear around the display area under the effect of the backlight, affecting the display effect of the picture and reducing the user experience. Summary of the invention

[0005] The main purpose of the present invention is to provide a backlight control method, a backlight controller and related devices for a display device, aiming to solve the problem in the prior art that when the display panel of a liquid crystal display screen is exposed to backlight, a halo phenomenon will appear around the display area, affecting the display effect of the picture.

[0006] In order to achieve the above object, an embodiment of the present invention provides a backlight control method for a display device, wherein the display device comprises: a display panel and a backlight module, wherein the backlight module comprises a plurality of backlight partitions, and the method comprises:

[0007] Acquire a gain region corresponding to the received display signal in the display panel;

[0008] Determine the overlap area between the effective light radiation area of ​​each target backlight partition and the gain area; wherein the target backlight partition is a backlight partition in the backlight module that is related to the gain area;

[0009] The backlight brightness of the target backlight partition is adjusted according to the overlap area and a preset maximum halo index.

[0010] Optionally, the gain area is: a display area of ​​the display signal on the display panel; or

[0011] The key display content of the display signal is in the display area of ​​the display panel.

[0012] Optionally, adjusting the backlight brightness of the backlight partition according to the overlap area and a preset maximum halo index specifically includes:

[0013] The backlight brightness of the target backlight partition is adjusted according to the overlap area between the effective light radiation area of ​​the target backlight partition and the gain area and a preset maximum halo index.

[0014] Optionally, before determining the overlap area between the effective light radiation area of ​​each target backlight subarea and the gain area, the method further includes:

[0015] Calculating the distance between each of the backlight partitions in the backlight module and the gain region;

[0016] According to the distance and a preset threshold, the corresponding backlight partition is selected from the backlight module as the target backlight partition.

[0017] Optionally, the selecting the corresponding backlight partition from the backlight module as the target backlight partition according to the distance and a preset threshold specifically includes:

[0018] The backlight partitions in the backlight module whose distances are smaller than a preset threshold are used as pre-selected backlight partitions;

[0019] From the pre-selected backlight partitions, the pre-selected backlight partition that intersects with the gain area is selected as the target backlight partition.

[0020] Optionally, adjusting the backlight brightness of the target backlight partition according to the overlap area and a preset maximum halo index specifically includes:

[0021] Determining the halo influence factor of the target backlight partition according to the overlap area of ​​the effective light radiation area and the gain area of ​​each target backlight partition;

[0022] Determining a gradient weight coefficient of the target backlight partition based on a halo influence factor of each of the target backlight partitions and a preset maximum halo index;

[0023] According to the gradient weight coefficient of the target backlight partition, the maximum light intensity of the target backlight partition is adjusted to adjust the backlight brightness of the target backlight partition.

[0024] Optionally, the determining the gradient weight coefficient of the target backlight partition based on the halo influence factor of each target backlight partition and a preset maximum halo index specifically includes:

[0025] Acquire device information of the display device; the device information includes: light transmittance of the display panel, brightness contrast of the display panel, and maximum luminous intensity of the target backlight partition;

[0026] The gradient weight coefficient of the target backlight partition is determined according to the device information, the preset maximum halo index and the halo influence factor.

[0027] In order to achieve the above-mentioned purpose, an embodiment of the present invention further provides a backlight controller for a display device, the backlight controller comprising: a memory and a processor; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, the steps in the backlight control method for the display device as described above are implemented.

[0028] In order to achieve the above object, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the backlight control method of the display device as described above.

[0029] In order to achieve the above object, a display device is provided, comprising: a display panel, a backlight module and a backlight controller; wherein the backlight controller is the backlight controller of the display device as described above.

[0030] The present invention obtains the gain area corresponding to the received display signal in the display panel, and adjusts the backlight brightness of each target backlight partition according to the overlap area between the effective light radiation area of ​​the target backlight partition and the gain area. Since the overlap area between the effective light radiation area and the gain area of ​​each target backlight partition has different influences on the gain area, the brightness of the corresponding target backlight partition is adjusted based on the overlap area between the effective light radiation area and the gain area of ​​each target backlight partition, thereby reducing the influence of halo on the basis of satisfying the display as much as possible and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A flow chart of a backlight control method for a display device provided by an embodiment of the present invention;

[0032] Figure 2 A flowchart of step S102 provided in an embodiment of the present invention;

[0033] Figure 3 A flowchart of step S202 provided in an embodiment of the present invention;

[0034] Figure 4 A flowchart of step S104 provided in an embodiment of the present invention;

[0035] Figure 5 A flowchart of step S402 provided in an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of the structure of a backlight controller for a display device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The embodiment of the present invention provides a backlight control method for a display device, wherein the display device comprises: a display panel, a backlight module, the backlight module comprises a plurality of backlight partitions, and each backlight partition comprises at least one backlight lamp. Figure 1 As shown, the backlight control method of the display device at least includes the following steps:

[0039] S101, obtaining a gain region corresponding to a received display signal in a display panel.

[0040] The display signal refers to a signal transmitted from a signal terminal and needs to be displayed on a display panel.

[0041] In some embodiments of the present application, the gain area is: a display area of ​​a display signal on a display panel; or a display area of ​​key display content of a display signal on a display panel.

[0042] It is understandable that when the gain area is the display area of ​​the display signal on the display panel, it refers to the entire display area corresponding to the display signal. When the gain area is the display area of ​​the key display content of the display signal on the display panel, it refers to the partial display area corresponding to the key display content of the display signal.

[0043] In the embodiment of the present invention, the gain area corresponding to the display signal in the display panel can be determined according to different display scenes. For example, if the display scene is a portrait mode, which needs to focus on the person, the corresponding gain area of ​​the display signal is the area where the person is located. It can be understood that the display scene corresponding to the display signal can be determined according to the display content corresponding to the display signal.

[0044] Since different display scenarios have different requirements for display, there are two different gain areas corresponding to the display area in the embodiment of the present invention, which can be applied to different display scenarios to improve user experience.

[0045] S102, selecting a backlight partition associated with the gain area from the backlight module as a target backlight partition.

[0046] Specifically, Figure 2 As shown, the above step S102 can also be implemented by at least the following steps:

[0047] S201, calculating the distance between each backlight partition and the gain area in the backlight module.

[0048] Specifically, the distance between the center of the backlight partition and the center of the gain region can be used as the distance between the backlight partition and the gain region. Since the gain region may be an irregular shape, the center of gravity of the gain region can be used as the center.

[0049] It can be understood that when calculating the distance between each backlight partition and the gain area, a fixed reference object can be selected from the gain area. Therefore, in the embodiment of the present invention, the vertical distance between the center position of the backlight partition and a boundary line of the gain area can also be used as the distance between the backlight partition and the gain area, which is not specifically limited in the embodiment of the present invention.

[0050] S202: Select a corresponding backlight partition from the backlight module as a target backlight partition according to the distance and a preset threshold.

[0051] In the embodiment of the present invention, the backlight partition whose distance is smaller than the preset threshold may be taken as the backlight partition associated with the gain region, that is, as the target backlight partition.

[0052] Furthermore, if Figure 3 As shown, step S202 can be implemented by at least the following steps:

[0053] S301, taking the backlight partitions in the backlight module whose distance is smaller than a preset threshold as pre-selected backlight partitions.

[0054] S302 : Select, from the pre-selected backlight partitions, a pre-selected backlight partition that intersects with the gain region as a target backlight partition.

[0055] Since the preset threshold can be set to a larger value in order to avoid missing the backlight partitions related to the gain region in the backlight module, the target backlight partition determined only by the above step S402 may have certain noises, which may affect the backlight control effect of the display device. Therefore, in the embodiment of the present invention, the pre-selected backlight partition is first determined by the distance between the backlight partition and the gain region, and then the pre-selected backlight partition that has an intersection with the gain region is used as the target backlight partition, thereby further improving the backlight control effect of the display device and reducing the generation of the halo phenomenon.

[0056] In the embodiment of the present invention, the intersection with the gain region may be: a preselected backlight subregion having an overlapping portion with the gain region, and a preselected backlight subregion adjacent to the backlight subregion where the outline of the gain region is located.

[0057] S103, determining the effective light radiation area of ​​each target backlight subarea and the overlapping area of ​​the gain area.

[0058] The target backlight partition is a backlight partition related to the gain area in the backlight module.

[0059] Specifically, the effective light radiation area of ​​the target backlight partition, that is, the illumination area of ​​the backlight of the target backlight partition on the display panel, can be determined first, and then the area of ​​the overlapping area between the effective light radiation area of ​​the target backlight partition and the gain area (that is, the overlapping area) can be determined.

[0060] The effective light radiation area of ​​the target backlight partition is related to the illumination angle of the backlight. For example, if the effective illumination angle of each backlight in the target backlight partition is 120°, then the 120° aperture surrounded by all the backlights in the target backlight partition is regarded as the effective light radiation area.

[0061] S104, adjusting the backlight brightness of each target backlight partition according to the effective light radiation area of ​​each target backlight partition and the overlapping area of ​​the gain region and a preset maximum halo index.

[0062] The preset maximum halo index is a preset acceptable maximum halo index. In the embodiment of the present invention, the preset maximum halo index can be adaptively adjusted according to user needs, and the specific value is not specifically limited in the embodiment of the present invention.

[0063] The size of the overlap area between the effective light radiation area of ​​the target backlight partition and the gain area has different influences on the gain area. Moreover, the overlap area between the effective light radiation area of ​​the target backlight partition and the gain area is positively correlated with the influence of the gain area, that is, the larger the overlap area between the effective light radiation area of ​​the target backlight partition and the gain area (i.e., the higher the overlap), the higher the influence on the gain area.

[0064] Therefore, in the embodiment of the present invention, the backlight brightness of each target backlight partition can be adjusted according to the overlapping area of ​​the effective light radiation area of ​​each target backlight partition and the gain area and the preset maximum halo index to effectively reduce the halo phenomenon and improve user experience.

[0065] like Figure 4 As shown, the above step S104 can be implemented by at least the following steps:

[0066] S401 , determining a halo influence factor of each target backlight partition according to an overlap area between an effective light radiation area and a gain area of ​​each target backlight partition.

[0067] Specifically, the halo impact factor Q of the target backlight partition is:

[0068]

[0069] Among them, P r represents the area of ​​the effective light radiation area of ​​the target backlight partition, R represents the area of ​​the gain area, and P r IR represents the overlapping area of ​​the effective light radiation area and the gain area of ​​the target backlight partition.

[0070] S402: Determine a gradient weight coefficient of a target backlight partition based on a preset maximum halo index and a halo influence factor.

[0071] Furthermore, if Figure 5 As shown, the above step S402 can be implemented by at least the following steps:

[0072] S501, obtaining device information of a display device.

[0073] The device information includes: the transmittance of the display panel, the brightness contrast of the display panel, and the maximum luminous intensity of the backlight partition.

[0074] S502 : Determine a gradient weight coefficient of a target backlight partition according to device information of the display device, a preset maximum halo index, and a halo influence factor.

[0075] Specifically, the gradient weight coefficient λ of the target backlight partition is:

[0076] And 0≤λ≤1;

[0077] Among them, Y m represents the preset maximum halo index, t represents the transmittance of the display panel, T represents the brightness contrast of the display panel, and L represents the maximum light intensity of the target backlight partition (i.e., the light intensity when all backlights in the backlight partition emit light at the maximum intensity).

[0078] S503 , adjusting the maximum light intensity of the target backlight partition according to the gradient weight coefficient of each target backlight partition, so as to adjust the backlight brightness of the target backlight partition.

[0079] Specifically, after determining the gradient weight coefficient of each target backlight partition, the maximum light intensity L of the corresponding target backlight partition is adjusted according to the gradient weight coefficient, so that the light intensity of the target backlight partition is adjusted from L to λL, that is, the backlight brightness of the target backlight partition is adjusted to reduce the halo phenomenon, achieve a balance between the display effect in the gain area and the halo phenomenon, and improve the user experience.

[0080] With the continuous development of liquid crystal display technology, the number of backlight partitions divided by the backlight module is increasing. For example, there are mini backlights with thousands of backlight partitions. Then, the backlight brightness of each backlight partition in the backlight module is adjusted by the overlap area of ​​the effective light radiation area and the gain area of ​​each backlight partition in the backlight module and the preset maximum halo index, and the required computing resources are large. In addition, the display area occupied by the gain area of ​​the general display signal on the display panel is limited, which will also waste certain computing resources. Therefore, in an embodiment of the present invention, a backlight partition related to the gain area is selected from the backlight module as the target backlight partition. It is only necessary to determine the overlap area of ​​the effective light radiation area and the gain area of ​​the target backlight partition and adjust the backlight brightness of the target backlight partition. While alleviating the halo phenomenon, it can also save computing resources.

[0081] The backlight control method of the display device provided by the embodiment of the present invention determines the gain area corresponding to the display signal in the display panel through the received display signal, and then adjusts the backlight brightness of each backlight partition according to the overlap area of ​​the effective light radiation area and the gain area of ​​each backlight partition in the backlight module. Since the overlap area of ​​the effective light radiation area and the gain area of ​​each backlight partition has different influences on the gain area, the brightness of the corresponding backlight partition is adjusted based on the overlap area of ​​the effective light radiation area and the gain area of ​​each backlight partition, thereby reducing the influence of halo on the basis of satisfying the display as much as possible.

[0082] Based on the backlight control method of the display device provided in the above embodiment, the embodiment of the present invention further provides a backlight controller of the display device, such as Figure 6 As shown, the backlight controller includes at least one processor (processor) 60; a display screen 61; and a memory (memory) 62, and may also include a communication interface (Communications Interface) 63 and a bus 64. Among them, the processor 60, the display screen 61, the memory 62 and the communication interface 63 can communicate with each other through the bus 64. The display screen 61 is configured to display a preset user guide interface in the initial setting mode. The communication interface 63 can transmit information. The processor 60 can call the logic instructions in the memory 62 to execute the steps in the backlight control method of the display device described in the above embodiment.

[0083] In addition, the logic instructions in the memory 62 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0084] The memory 62 is a computer-readable storage medium that can be configured to store software programs, computer executable programs, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 60 executes the functional application and data processing by running the software programs, instructions or modules stored in the memory 62, that is, implementing the methods in the above embodiments.

[0085] The memory 62 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 62 may include a high-speed random access memory and may also include a non-volatile memory. For example, a variety of media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, may also be a transient storage medium.

[0086] Based on the backlight controller of the above display device, an embodiment of the present invention further provides a display device, which at least includes: a display panel, a backlight module and a backlight controller, wherein the backlight controller is the backlight controller of the display device provided in the above embodiment. The backlight module is controlled by the backlight controller.

[0087] Based on the backlight control method of the display device provided in the above embodiment, an embodiment of the present invention further provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the backlight control method of the display device as described above.

[0088] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the backlight controller, medium and display device embodiments, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0089] The backlight controller, medium and display device provided in the embodiments of the present application correspond one-to-one to the method. Therefore, the backlight controller, medium and display device also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the backlight controller, medium and display device will not be repeated here.

[0090] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0091] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the program can be stored in a computer-readable storage medium that can be read by a computer, and the program can include the processes of the above-mentioned method embodiments when executed. The computer-readable storage medium can be a memory, a disk, an optical disk, etc.

[0092] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A backlight control method for a display device, the display device comprising: A display panel and a backlight module, wherein the backlight module includes a plurality of backlight partitions, wherein the method includes: Acquire a gain region corresponding to the received display signal in the display panel; Determine the overlap area between the effective light radiation area of ​​each target backlight partition and the gain area; wherein the target backlight partition is a backlight partition in the backlight module that is related to the gain area; According to the overlap area and a preset maximum halo index, adjusting the backlight brightness of the target backlight partition; According to the overlap area and the preset maximum halo index, adjusting the backlight brightness of the target backlight partition, specifically comprising: determining the halo influence factor of the target backlight partition according to the overlap area of ​​the effective light radiation area and the gain area of ​​each target backlight partition; Determining a gradient weight coefficient of the target backlight partition based on the halo influence factor of each target backlight partition and the preset maximum halo index; According to the gradient weight coefficient of the target backlight partition, the maximum light intensity of the backlight partition is adjusted to adjust the backlight brightness of the target backlight partition.

2. The backlight control method of a display device according to claim 1, characterized in that: The gain region is: the display region of the display signal on the display panel; Or the key display content of the display signal is in the display area of ​​the display panel.

3. The backlight control method of a display device according to claim 1, characterized in that: The adjusting the backlight brightness of the target backlight partition according to the overlap area and the preset maximum halo index specifically includes: The backlight brightness of the target backlight partition is adjusted according to the overlap area between the effective light radiation area and the gain area of ​​the target backlight partition and a preset maximum halo index.

4. The backlight control method of a display device according to claim 1, characterized in that: Before determining the overlap area between the effective light radiation area of ​​each target backlight partition and the gain area, the method further includes: Calculating the distance between each of the backlight partitions in the backlight module and the gain region; According to the distance and a preset threshold, the corresponding backlight partition is selected from the backlight module as the target backlight partition.

5. The backlight control method of a display device according to claim 4, characterized in that: The selecting the corresponding backlight partition from the backlight module as the target backlight partition according to the distance and the preset threshold specifically includes: The backlight partitions in the backlight module whose distances are smaller than a preset threshold are used as pre-selected backlight partitions; From the pre-selected backlight partitions, the pre-selected backlight partition that intersects with the gain area is selected as the target backlight partition.

6. The backlight control method of a display device according to claim 1, characterized in that: The determining of the gradient weight coefficient of the target backlight partition based on the halo influence factor of each target backlight partition and the preset maximum halo index specifically includes: Acquire device information of the display device; the device information includes: light transmittance of the display panel, light-dark contrast of the display panel, and maximum luminous intensity of the backlight partition; The gradient weight coefficient of the target backlight partition is determined according to the device information, the preset maximum halo index, and the halo influence factor.

7. A backlight controller for a display device, characterized in that: The backlight controller includes: a memory and a processor; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, the steps in the backlight control method of the display device as described in any one of claims 1-6 are implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the backlight control method of the display device according to any one of claims 1 to 6.

9. A display device, characterized in that: The display device comprises: a display panel, a backlight module and a backlight controller; wherein the backlight controller is the backlight controller of the display device according to claim 7.

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