Optical compensation method and device, electronic equipment and storage medium

Abstract

This application discloses an optical compensation method, apparatus, electronic device, and storage medium. The method includes: determining a first set based on first parameters corresponding to each backlight partition in the backlight module of a display device; the first parameters characterize circuit characteristic parameters of the corresponding backlight partition; the first set characterizes a set of second parameters for a first region corresponding to each backlight partition; the first region characterizes a corresponding region on the display panel of the display device; the second parameters characterize optical characteristic parameters of the corresponding first region; and, if the first set does not meet a set of predetermined conditions, adjusting the first parameters corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the predetermined conditions.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an optical compensation method, device, electronic device, and storage medium. Background Technology

[0002] Liquid crystal display (LCD) devices have been widely used due to their advantages such as light weight, long lifespan, and excellent display quality. An LCD device typically consists of two parts: an LCD panel and a backlight module. However, due to fluctuations in the manufacturing parameters of the LCD panel and the arrangement of the light sources in the backlight module, LCD devices often suffer from poor image quality when displaying images. Summary of the Invention

[0003] In view of this, embodiments of this application provide an optical compensation method, apparatus, electronic device, and storage medium to at least solve the problem of poor screen display quality in related technology LCD devices.

[0004] The technical solution of this application embodiment is implemented as follows:

[0005] This application provides an optical compensation method, including:

[0006] A first set is determined based on the first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents the circuit characteristic parameters of the corresponding backlight partition; the first set represents the set of second parameters of the first region corresponding to each backlight partition; the first region represents the corresponding region on the display panel of the display device; the second parameter represents the optical characteristic parameters of the corresponding first region.

[0007] If the first set does not meet the set conditions, adjust the first parameter corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the set conditions.

[0008] In the above scheme, the set condition indicates that all first differences are less than the first threshold; the first difference indicates the difference of the second parameter corresponding to two areas on the display panel that satisfy the set positional relationship.

[0009] In the above scheme, the two regions on the display panel that satisfy the set positional relationship include a second region and a third region; the second region represents the first region where the center point of the display panel is located; the third region represents any first region on the display panel other than the second region;

[0010] The adjustment of the first parameter corresponding to each of the at least one backlight zone includes:

[0011] Based on the second parameters of the second region and the second parameters of the third region, adjust the first parameter of the backlight zone corresponding to the third region.

[0012] In the above scheme, adjusting the first parameter of the backlight partition corresponding to the third region includes:

[0013] If the second parameter of the third region is less than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by a first coefficient; the first coefficient is greater than 1.

[0014] If the second parameter of the third region is greater than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by the second coefficient; the second coefficient is less than 1.

[0015] In the above scheme, two areas on the display panel that satisfy the set positional relationship are represented as two horizontally adjacent first areas or two vertically adjacent first areas.

[0016] In the above scheme, adjusting the first parameter corresponding to each of the at least one backlight zone includes:

[0017] If the first difference is greater than the second difference, adjust the first parameter of the backlight partition corresponding to each of the two first regions that satisfy the set positional relationship;

[0018] If the first difference is not greater than the second difference, the first parameter of the backlight partition corresponding to the fourth region is adjusted according to the first difference; the fourth region represents a first region determined based on a set rule among two first regions that satisfy a set positional relationship;

[0019] The second difference represents the difference of the third parameter between two first regions that satisfy the set positional relationship; the third parameter represents the second parameter when no optical compensation is performed.

[0020] In the above scheme, the number of backlight zones in the backlight module is greater than or equal to 200.

[0021] The method in the above scheme further includes:

[0022] After the adjusted first set satisfies the set conditions, the first parameter and the fourth parameter corresponding to each adjusted backlight zone are associated and stored; wherein,

[0023] The fourth parameter represents the circuit characteristic parameters that are input into the display panel.

[0024] This application also provides an optical compensation device, including:

[0025] The testing unit is used to determine a first set based on a first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents the circuit characteristic parameters of the corresponding backlight partition; the first set represents the set of second parameters of a first region corresponding to each backlight partition; the first region represents the corresponding region on the display panel of the display device; and the second parameter represents the optical characteristic parameters of the corresponding first region.

[0026] An adjustment unit is used to adjust the first parameter corresponding to each backlight partition in at least one backlight partition when the first set does not meet the set conditions, until the adjusted first set meets the set conditions.

[0027] This application also provides an electronic device, including: a processor and a memory for storing a computer program capable of running on the processor.

[0028] When the processor runs the computer program, it executes the steps of the optical compensation method described above.

[0029] This application also provides a storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described optical compensation method.

[0030] In this embodiment, based on the circuit characteristic parameters corresponding to each backlight partition in the backlight module of the display device, a set of optical characteristic parameters of the first area corresponding to each backlight partition on the display panel is determined as a first set. If the determined first set does not meet the set conditions, the circuit characteristic parameters of each backlight partition in at least one backlight partition are adjusted, and the above steps are repeated until the obtained first set meets the set conditions. In this way, by adjusting the circuit characteristic parameters of at least one backlight partition of the backlight module, the optical characteristic parameters of each point of the display device are uniform, thereby improving the display quality of the display device when displaying images. Attached Figure Description

[0031] Figure 1 A schematic diagram illustrating the implementation process of the optical compensation method provided in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram illustrating the division of the display panel into regions based on the backlight partitions of the backlight module, as provided in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram illustrating the division of the display panel into regions based on the backlight partitions of the backlight module, as provided in another embodiment of this application.

[0034] Figure 4 A schematic diagram of the region combination provided in the embodiments of this application;

[0035] Figure 5 A schematic diagram of a region combination provided for another embodiment of this application;

[0036] Figure 6 A schematic diagram of a region combination provided in yet another embodiment of this application;

[0037] Figure 7 A schematic diagram illustrating the regional comparison of positional relationships provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the display panel area provided in an embodiment of this application;

[0039] Figure 9 A schematic diagram illustrating the implementation process of the brightness compensation method provided in this application embodiment;

[0040] Figure 10 This is a schematic diagram of the optical compensation structure provided in the embodiments of this application;

[0041] Figure 11 This is a schematic diagram of the hardware structure of an electronic device provided in another embodiment of this application. Detailed Implementation

[0042] LCD devices have been widely used due to their advantages such as light weight, long lifespan, and excellent display quality. Since the LCD panel itself does not emit light, it relies on the light generated by a backlight module to display images; therefore, the backlight module is an indispensable part of a liquid crystal display. Currently, backlight modules are mainly divided into edge-lit backlight modules and direct-lit backlight modules based on the different LED light-emitting methods.

[0043] In related technologies, fluctuations in the manufacturing parameters of LCD panels can create different types of mura, resulting in brightness differences between the mura areas and normal areas during display, leading to uneven brightness on the LCD panel. To improve the uniformity of LCD panel brightness, an external camera can be used to capture grayscale images. By comparing the brightness of the center position of the LCD panel, the difference in brightness between the surrounding areas and the center is calculated. This inverse compensation data is stored in the flash memory of the LCD panel circuitry and then used to inversely compensate for the grayscale of the mura areas, achieving a more uniform overall brightness for the LCD panel. However, since LCD panels themselves do not emit light, when paired with large-size direct-lit backlight modules, the backlight module itself will also suffer from uneven brightness. Even with optical compensation, the problem of uneven screen brightness persists when using a direct-lit backlight with uneven brightness.

[0044] The arrangement of light sources in the backlight module, such as differences in LED density and arrangement between the center and edges, can also cause uneven brightness. Current methods to improve this include printing dots on optical components such as reflective sheets or diffusers, and adding optical films. Because both LCD panels and direct-lit backlight modules suffer from uneven brightness, LCD devices often experience poor image display quality.

[0045] Based on this, in various embodiments of this application, based on the circuit characteristic parameters corresponding to each backlight partition in the backlight module of the display device, a set of optical characteristic parameters of the first area corresponding to each backlight partition on the display panel is determined as a first set. If the determined first set does not meet the set conditions, the circuit characteristic parameters of each backlight partition in at least one backlight partition are adjusted, and the above steps are repeated until the obtained first set meets the set conditions. In this way, by adjusting the circuit characteristic parameters of at least one backlight partition of the backlight module, the optical characteristic parameters of each point of the display device are uniform, thereby improving the display quality of the display device when displaying images.

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0047] Figure 1 This is a schematic diagram illustrating the implementation process of the optical compensation method provided in an embodiment of this application. Figure 1 The optical compensation methods shown include:

[0048] Step 101: Determine the first set based on the first parameters corresponding to each backlight zone in the backlight module of the display device.

[0049] Wherein, the first parameter represents the circuit characteristic parameters of the corresponding backlight partition; the first set represents the set of second parameters of the first region corresponding to each backlight partition; the first region represents the corresponding region on the display panel of the display device; and the second parameter represents the optical characteristic parameters of the corresponding first region.

[0050] For display devices, variations in display panel manufacturing parameters and backlight module light source arrangement can create different types of mura, resulting in brightness differences between the mura and normal areas during display, leading to uneven display. In the embodiments of this application, the display devices with optical compensation typically have both mura and normal areas, resulting in uneven screen brightness. The backlight module used needs to support Local Dimming technology, and the nine-point backlight uniformity of the backlight module is typically no less than 70%.

[0051] Here, the display panel is divided into regions based on the backlight partitioning of the backlight module, resulting in the corresponding first region. When dividing the first region of the display panel, it can be... Figure 2 The backlight zone shown corresponds to the first area of ​​a display panel, or it can be... Figure 3 The adjacent backlight zones shown correspond to the first area of ​​a display panel. That is, each first area can correspond to one backlight zone, or it can correspond to two or more adjacent backlight zones. Due to the slight difference in size between the backlight module and the display panel, the outermost area of ​​the display panel cannot completely correspond to the size of the backlight zones, so it is matched according to the actual size.

[0052] Figure 2 A schematic diagram illustrating the division of the display panel into regions based on the backlight zones of the backlight module is shown, such as... Figure 2 As shown, the display panel is divided into zones with the same area and size as the backlight zones, and these zones are numbered accordingly. Here, the numbers of the backlight zones of the backlight module correspond one-to-one with the numbers of the first areas of the display panel. Backlight zones 1 to 18 of the backlight module correspond to first areas 1 to 18 of the display panel.

[0053] Figure 3 This diagram illustrates another method of dividing the display panel into regions based on the backlight zones of the backlight module, such as... Figure 3 The backlight module is divided into two adjacent backlight zones, forming one area, and the display panel is divided and numbered accordingly. Here, there is a correspondence between the numbering of the backlight zones of the backlight module and the numbering of the first area of ​​the display panel. Backlight zones 1 and 2 of the backlight module correspond to the first area 1 of the display panel, backlight zones 3 and 4 of the backlight module correspond to the first area 2 of the display panel, and so on. Backlight zones 17 and 18 of the backlight module correspond to the first area 9 of the display panel.

[0054] Input the corresponding circuit characteristic parameters to each backlight zone in the backlight module of the display device to illuminate the backlight module. Input the set circuit characteristic parameters to the display panel, and collect the second parameter L of each first area using an instrument. x The set of acquired second parameters is defined as the first set. Here, the circuit characteristic parameters corresponding to each backlight zone include current parameters and / or voltage parameters, and the second parameters characterize optical characteristic parameters. When acquiring the second parameters for each region, a charge-coupled device (CCD) and / or a spectrometer are typically used to acquire the optical characteristic parameters at the center point of each region. The optical characteristic parameters include at least brightness. The first set can be represented by a matrix to characterize the optical characteristic parameters of each first region. For example, Figure 3The display panel shown has 9 first areas, and the corresponding first set can be...

[0055] Step 102: If the first set does not meet the set conditions, adjust the first parameter corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the set conditions.

[0056] If the determined first set does not meet the set conditions, adjust the first parameter of each backlight zone in at least one backlight zone, and input the adjusted first parameter to the corresponding backlight zone of the backlight module. Collect the second parameter of each first area of ​​the adjusted display panel to determine the first set. Determine whether the adjusted first set meets the set conditions. If not, repeat the above steps until the first set determined by adjusting the first parameter meets the set conditions, then stop adjusting the first parameter. In practical applications, when the adjusted first set meets the set conditions, the set of first parameters corresponding to the first set at this time is the second set. The stored second set can be used as the optical characteristic parameters for reference when the display device is displaying, thereby improving the display quality of the display device when displaying images.

[0057] In one embodiment, the set condition indicates that all first differences are less than a first threshold; the first difference indicates the difference of the second parameter corresponding to two areas on the display panel that satisfy the set positional relationship.

[0058] When determining whether the obtained first set meets the set conditions, based on the obtained first set, the second parameters corresponding to any two regions on the display panel that meet the set positional relationship are compared to obtain the corresponding first difference value, and it is determined whether the obtained first difference value is greater than the first threshold. Here, the two regions that meet the set positional relationship include, but are not limited to: two adjacent regions; two regions that are not adjacent but are adjacent to the same region; the region where the center point is located and any region other than the region where the center point is located.

[0059] Here, when comparing the second parameters corresponding to any two regions on the display panel that satisfy a set positional relationship, each pair of regions on the display panel that satisfy the set positional relationship is considered a combination. The first difference in the second parameter corresponding to each combination is compared to see if it is greater than a first threshold. If all combinations satisfy the set conditions, the first parameter is no longer adjusted. If at least one combination does not satisfy the set conditions, the steps of adjusting the first parameter and collecting the second parameter are repeated. The first threshold characterizes the maximum acceptable difference in optical characteristic parameters between two regions on the display panel that satisfy the set positional relationship when optical compensation is performed on the display device.

[0060] In practical applications, due to the wide range of applications for display devices, their shapes are no longer limited to traditional rectangles, but may include curved screens, notch screens, and other irregularly shaped displays. Furthermore, to meet different application scenarios, the standards for the optical characteristic parameters of display devices also differ; for example, the locations where optical characteristic parameters are collected may also vary. Therefore, the combination of any two areas on the display panel can be set according to the actual situation. The methods for setting the combination of any two areas include, but are not limited to: combining two first areas as a combination; combining at least two first areas and one first area as a combination; and combining at least two first areas with at least two first areas as a combination.

[0061] Figures 4 to 6 Schematic diagrams of three different region combinations are shown.

[0062] Figure 4 The diagram shown combines two first regions into one group. Depending on the selected positional relationship, possible combinations include, but are not limited to: (1, 2), (1, 7), (1, 8), (1, 10), (1, 9).

[0063] Figure 5 The diagram shown is a combination of at least two first regions and one first region. Depending on the selection of the set positional relationship, possible combinations include, but are not limited to: (1, 2), (1, 7), (2, 3), (2, 8).

[0064] Figure 6 The diagram shown is a combination of at least two first regions and at least two first regions. Depending on the selection of the set positional relationship, possible combinations include, but are not limited to: (1,2), (1,6), (2,3), (2,7), (3,4), (3,7), (3,8), (4,5), (4,8).

[0065] In one embodiment, two regions on the display panel that satisfy a predetermined positional relationship include a second region and a third region; the second region represents a first region where the center point of the display panel is located; the third region represents any first region on the display panel other than the second region;

[0066] The adjustment of the first parameter corresponding to each of the at least one backlight zone includes:

[0067] Based on the second parameters of the second region and the second parameters of the third region, adjust the first parameter of the backlight zone corresponding to the third region.

[0068] If the obtained first set meets the set conditions, based on the determined first set, the second parameters of the second region and the third region are compared to obtain the corresponding first difference. According to the size relationship between the second region and the third region, the first parameter of the backlight partition corresponding to the third region is adjusted based on the corresponding first difference. That is, the second parameter of the second region is maintained, while the second parameter of the third region is adjusted, thereby making the optical characteristic parameters of each point of the display device uniform. Here, the second region represents the first region where the center point of the display panel is located, and the third region represents any first region on the display panel other than the second region. The first difference represents the absolute value of the difference between the second parameters of the second region and the second parameters of the third region, which can be obtained by subtracting the second parameter of the region with the larger second parameter from the second parameter of the region with the smaller second parameter.

[0069] A second threshold can also be set as a condition for adjusting the third region. The second threshold represents the maximum acceptable difference between the optical characteristic parameters of the third region and the optical characteristic parameters of the second region when optical compensation is performed on the display device. In practical applications, the second threshold can be set to 0, that is, when the second parameters of the second region and the third region are not equal, the first parameter corresponding to the backlight zone of the third region is adjusted.

[0070] Before judging the set conditions, we can first define the first region where the center point is located as the second region, and all other first regions except the second region as the third region. For example... Figure 8 The schematic diagram of the display panel area shown indicates that region E is the second region, and regions A, B, C, D, F, G, H, and J are the third regions. Each first region corresponds to at least one backlight zone. When determining each first region, the corresponding backlight zone is typically complete. Thus, after adjusting the first parameter of the backlight zone corresponding to the third region at least once, the optical characteristic parameters of each point on the display device are uniform, thereby improving the display quality when displaying images.

[0071] Due to factors such as panel manufacturing processes, for example, during film formation steps like Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD), there will inevitably be differences in film thickness and quality between the edges and the center, resulting in the optical performance of the entire display panel not being completely uniform. In one embodiment, adjusting the first parameter of the backlight partition corresponding to the third region includes:

[0072] If the second parameter of the third region is less than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by a first coefficient; the first coefficient is greater than 1.

[0073] If the second parameter of the third region is greater than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by the second coefficient; the second coefficient is less than 1.

[0074] Here, when adjusting the first parameter of the backlight zone corresponding to the third region, the first coefficient or the second coefficient is determined based on the first difference.

[0075] In practical applications, the second parameter of each third region is compared with the second parameter of the second region.

[0076] When the second parameter of the third region is less than the second parameter of the second region, the first coefficient α is determined using the following formula 1:

[0077] α = 1 + 1.05 * |L A -L E | / L E (1)

[0078] in,

[0079] L E The second parameter characterizing the second region; L A The second parameter characterizing the third region.

[0080] When the second parameter of the third region is greater than the second parameter of the second region, the second coefficient β is determined using the following formula 2:

[0081] β=1-1.05*|L A -L E | / L E (2)

[0082] Based on the determined first or second parameter, the first parameter E of the backlight partition corresponding to the third region is updated using the following formula 3. A :

[0083]

[0084] in,

[0085] E peak The peak circuit characteristic parameters characterize the corresponding backlight zone's maximum input circuit characteristic parameters; E′ A The first parameter characterizing the backlight partition corresponding to the third region before the update is typically taken as 70% of the peak circuit characteristic parameter value.

[0086] Typically, the area at the center point performs better optically than the edge areas. When performing optical compensation, maintaining the optical parameters of the area at the center point and adjusting the optical parameters of the surrounding areas results in better overall optical performance of the display device, thus achieving a superior display effect.

[0087] In one embodiment, two regions on the display panel that satisfy a set positional relationship are characterized as two horizontally adjacent first regions or two vertically adjacent first regions.

[0088] Here, when determining whether the obtained first set meets the set conditions, based on the determined first set, the corresponding second parameters of two horizontally adjacent first areas or two vertically adjacent first areas on the display panel are compared to obtain the corresponding first difference. Then, it is determined whether the obtained first difference is greater than a first threshold, thereby adjusting the first parameter corresponding to at least one backlight zone. When comparing the second parameters corresponding to the first areas that satisfy the set positional relationship, this includes, but is not limited to, comparing only two horizontally adjacent first areas or only two vertically adjacent first areas, or a combination of both, i.e., comparing horizontally adjacent first areas first, and then comparing vertically adjacent first areas; furthermore, it is possible to further set the comparison of first areas with other positional relationships, such as... Figure 7 The diagram shows two areas of the same color within a checkerboard pattern. This creates a smooth transition in the optical characteristics of consecutive areas on the display device, thereby improving the display quality when showing an image.

[0089] In practical applications, with Figure 8 Taking the illustrated display panel area diagram as an example, after performing a horizontal comparison in the order of (A, B), (B, C), (D, E), (E, F), (G, H), (H, J), a vertical comparison is then performed in the order of (A, D), (D, G), (B, E), (E, H), (C, F), (F, J). This results in a smooth transition of optical characteristics across the entire continuous area of ​​the adjusted display device, thereby improving the display quality when displaying images.

[0090] In one embodiment, adjusting the first parameter corresponding to each of the at least one backlight zone includes:

[0091] If the first difference is greater than the second difference, adjust the first parameter of the backlight partition corresponding to each of the two first regions that satisfy the set positional relationship;

[0092] If the first difference is not greater than the second difference, the first parameter of the backlight partition corresponding to the fourth region is adjusted according to the first difference; the fourth region represents a first region determined based on a set rule among two first regions that satisfy a set positional relationship;

[0093] The second difference represents the difference of the third parameter between two first regions that satisfy the set positional relationship; the third parameter represents the second parameter when no optical compensation is performed.

[0094] Here, the second difference can be determined based on the first set recorded in the storage medium when optical compensation was not performed.

[0095] Before determining the relationship between the first and second differences, the difference ratio can be determined by comparing the first difference with the smaller second parameter in the two first regions. This ratio is then compared to a set ratio threshold T1. If the difference ratio is greater than the ratio threshold, the first and second differences are compared. Thus, the ratio threshold serves as the condition for adjusting the first parameter of the backlight zones corresponding to the two first regions. If the adjusted ratio difference is greater than the ratio threshold, the adjustment of the first parameter of at least one backlight zone is repeated until the determined difference ratio is less than the ratio threshold. In practical applications, the ratio threshold T1 can be set to 5%. By setting the ratio threshold to determine whether to adjust the first parameter of at least one backlight zone corresponding to the two first regions, the optical performance of each point on the display device can be controlled after adjustment.

[0096] By comparing the difference between the second parameters of the two first regions before and after optical compensation, that is, by comparing the current first difference with the second difference when optical compensation is not performed, the first parameter corresponding to at least one backlight zone is adjusted.

[0097] If the first difference is greater than the second difference, each of the two first regions that satisfy the set positional relationship is adjusted based on the first parameter when optical compensation is not performed. That is, the first parameter value of each of the two first regions is restored to the first parameter value when optical compensation is not performed.

[0098] If the first difference is not greater than the second difference, the first parameters of the backlight zones corresponding to the first regions determined based on the set rules in the two first regions are adjusted according to the first difference. Here, the method of determining the fourth region based on the set rules includes, but is not limited to, determining the first region with the larger coordinate in the set coordinate axis as the fourth region, or determining the first region that appears later in the pairwise comparison of the two first regions as the fourth region. Figure 8 For example, when comparing (A, B) and (B, C) in the order of horizontal comparison, the first region C is the first region that is compared later in the order of the regions.

[0099] In practical applications, the third coefficient γ is determined using the following formula 4:

[0100] γ = 1 + 0.5 * |LC -L D | (4)

[0101] in,

[0102] L C The second parameter characterizing the fourth region; L D The second parameter characterizes the fifth region, which is the other first region besides the fourth region among the two first regions.

[0103] If the second parameter of the fourth region is less than the second parameter of the fifth region, multiply the first parameter of the backlight zone corresponding to the fourth region by the third coefficient γ. If the second parameter of the fourth region is greater than the second parameter of the fifth region, divide the first parameter of the backlight zone corresponding to the fourth region by the third coefficient γ.

[0104] In one embodiment, the number of backlight zones in the backlight module is greater than or equal to 200.

[0105] Here, the larger the number of backlight zones in the backlight module, the more uniform the optical characteristic parameters of each point of the display device after optical compensation. When the number of backlight zones is 200 or more, the optical characteristic parameters of each point of the display device after optical compensation are uniform, thereby improving the display quality of the display device when displaying images.

[0106] In one embodiment, the method further includes:

[0107] After the adjusted first set meets the set conditions, the first parameter and the fourth parameter corresponding to each adjusted backlight zone are associated and stored; where,

[0108] The fourth parameter represents the circuit characteristic parameters that are input into the display panel.

[0109] Here, the fourth parameter represents the circuit characteristic parameters set by the input display panel, which can be current parameters and / or voltage parameters. Based on different circuit characteristic parameters of the input display panel, the display device will display different grayscale images. During optical compensation, the set circuit characteristic parameters are input to the display panel, causing the display device to display a grayscale image corresponding to the optical characteristics. Optical compensation is then performed under this grayscale image; that is, in this embodiment, optical compensation is performed while the display device is displaying a grayscale image. Grayscale images include, but are not limited to, red, green, blue, and white images.

[0110] When a fourth parameter is input to the display panel, the display device undergoes optical adjustment. After the adjusted first set meets the set conditions, the first parameter corresponding to each backlight zone after adjustment is associated with the fourth parameter and stored. This process is repeated, storing at least one association between the fourth parameter and the first parameter corresponding to each adjusted backlight zone in the display device. When the display device displays an image, optical compensation is performed on the display device based on the fourth parameters of different areas of the display panel, using the associated stored first parameters corresponding to each backlight zone. Specifically, according to the fourth parameters of each first area in the display panel, the associated first parameter is input to the corresponding backlight zone, and optical compensation is performed on the display device, thereby improving the display quality.

[0111] In practical applications, common display devices such as televisions and computer monitors typically use 256-bit grayscale. Taking a display panel displaying a grayscale image with four grayscale levels, namely 63, 127, 191, and 255 grayscale, as an example, optical compensation is performed to adjust the input circuit characteristic parameters of the display panel.

[0112] In the solution provided by this embodiment of the invention, based on the circuit characteristic parameters corresponding to each backlight partition in the backlight module of the display device, the set of optical characteristic parameters of the first area corresponding to each backlight partition on the display panel is determined as a first set. If the determined first set does not meet the set conditions, the circuit characteristic parameters of each backlight partition in at least one backlight partition are adjusted, and the above steps are repeated until the obtained first set meets the set conditions. In this way, by adjusting the circuit characteristic parameters of at least one backlight partition of the backlight module, the optical characteristic parameters of each point of the display device are uniform, thereby improving the display quality of the display device when displaying images.

[0113] With the development of backlight module technology, in addition to traditional backlight modules using LED strips or tubes as light sources, backlight modules can also use sub-millimeter light-emitting diodes (MiniLED), micron-sized light-emitting diodes (MicroLED), organic light-emitting diodes (OLED), or quantum dot light-emitting diodes (QLED) as light sources. MiniLED backlight modules have a smaller LED pixel pitch, resulting in more LEDs per unit area and a smaller light source unit size. This allows for more precise local dimming, thus improving the display quality. Taking MiniLED backlight modules as an example, the smaller LED pixel pitch, the greater number of LEDs per unit area, and the smaller light source unit size enable the backlight module to support more zones during local dimming, achieving more precise local dimming and thus improving the display quality.

[0114] As an application embodiment of the present invention, Figure 9 Taking the illustrated flow chart of the brightness compensation method as an example, it includes the following steps:

[0115] Step 901: Number each backlight zone of each MiniLED backlight module.

[0116] The backlight zones of the MiniLED backlight module are numbered B1, B2, B3, B4... with the zone containing the center point of the backlight module marked as B. E .

[0117] This document provides an LCD device based on a MiniLED backlight module. The MiniLED backlight module used has a nine-point backlight uniformity >70%, and it must have local dimming functionality. Optical compensation is better when the number of backlight zones exceeds 200; the more MiniLED zones, the easier it is to achieve precise alignment and control. The LCD device based on the MiniLED backlight module has both uneven brightness areas (Mura areas) and normal areas.

[0118] Step 902: Divide the display panel of the LCD device into zones according to the backlight zones.

[0119] The first area of ​​the display panel is numbered A1, A2, A3, A4..., with the center point of the display panel located in the first area marked as A. E .

[0120] The display area of ​​the LCD device's display panel is partitioned and numbered according to the position and size corresponding to the backlight partitions of the MiniLED backlight module. Specifically, the display area of ​​the display panel is divided according to the backlight partitions of the MiniLED backlight module to obtain the first area of ​​the display panel that corresponds one-to-one with the backlight partition, and then numbered. If the first area at the edge of the display panel cannot be exactly equal to the MiniLED backlight partition, the position corresponding to the boundary line in the coordinate system established with reference to the center point is used to determine the location.

[0121] Step 903: Determine the brightness matrix data corresponding to each first area of ​​the display panel.

[0122] First, power each backlight zone in the MiniLED backlight module at 70% of the peak current to illuminate the backlight module. The display panel shows a 255-level grayscale image. Use instruments such as CCD and spectrometer to collect and record the brightness data L1, L2, L3, L4... of each first area A1, A2, A3, A4 (center brightness is L). E This yields the brightness matrix data corresponding to each first area of ​​the display panel.

[0123] Collect and record Figure 8 The center brightness of area E is shown. Area E is the display panel area corresponding to the MiniLED backlight zone closest to the center of the screen. The current of the MiniLED backlight zone corresponding to area E is also 70% of the peak current.

[0124] Step 904: Compare the brightness values ​​of each first area with the center point area, and adjust the corresponding backlight zone current.

[0125] Here, the brightness values ​​L of the first regions L1, L2, L3, L4... are compared with those of the center point E region. E , with L A The brightness value of a certain area is represented by formulas 1, 2, and 3, which update the current E of the backlight partition of the MiniLED backlight module corresponding to the third area. A And record the corresponding data, and adjust the current of each MiniLED backlight zone corresponding to the first region in sequence using this method, where if α*E′ A ≥E peak In other words, if the current adjustment calculation result of the MiniLED backlight zone is greater than the peak current, then the current value of the corresponding backlight zone is taken as the maximum value of the current, i.e., the peak current.

[0126] Adjust the input current of each backlight zone, and the display panel displays a grayscale image. Use an instrument to test the current brightness value and record the data as T1, T2, T3, T4... Compare the brightness values ​​of the first area according to the proximity of the test data.

[0127] Here, you can first compare and adjust in a horizontal order, then in a vertical order, until the brightness difference of all the areas to be compared is less than 5%, then stop adjusting. If the brightness difference is within 5%, no further adjustment is needed; if the brightness difference is greater than 5%, then the brightness data of the two areas should be compared. X T Y The corresponding zone brightness value and L from the first test X L Y Comparison. The brightness difference is obtained by dividing the difference in brightness values ​​between two regions by the brightness value of the region with the smaller brightness value.

[0128] If |T X -T Y |<|L X -L Y Then, adjust T according to the coefficient γ calculated using formula 4. Y The current value, denoted as T Y1 If the brightness difference is greater than 5%, the coefficient T is adjusted again according to formula 4. Y1 The current value is adjusted until the brightness difference is less than 5%. Here, T Y It represents the region that comes later in the pairwise comparison between two regions.

[0129] If |T X -T Y |>|L X -L Y |, then T X T Y The current value is adjusted to L X L Y The current value, denoted as T LX1 T LY1 Then compare again. If the brightness difference is greater than 5%, continue to adjust in the above manner until the difference is less than 5%.

[0130] like Figure 8 As shown, in both horizontal and vertical comparison adjustments, the center point region E and region A are compared first, the brightness value of region A is adjusted, and then horizontal or vertical comparison adjustments are performed separately.

[0131] Step 905: Adjust the current or voltage of the input display panel to obtain optical adjustment results at different gray levels.

[0132] After adjusting the 256-bit grayscale image, adjust the current or voltage input to the display panel, and adjust the grayscale images at 10%, 20%, 30%, ..., 90% of the 256-bit grayscale image, and save the relevant adjustment results.

[0133] Step 906: Adjust the current of each backlight zone of the display device.

[0134] After adjusting the backlight zone current under each grayscale image, set the maximum current at the center point to 70% of the peak current, and adjust the current values ​​of other backlight zones according to the grayscale values ​​of the image.

[0135] This application provides a method for brightness compensation in the Mura region of a display device based on a MiniLED backlight module. By adjusting the brightness of the center point and the corresponding display panel area of ​​each backlight zone, the current of each backlight zone is adjusted. The brightness of each corresponding display panel area is then compared with that of its adjacent areas, and the input current of each backlight zone is adjusted accordingly. This achieves the ideal brightness of the selected zone's brightness point, thus completing the optical compensation for the area. After compensation, the brightness difference between the display panel areas is small, effectively compensating for the brightness difference between the Mura region and the normal area, thereby achieving a smooth transition and improving the display quality of the MiniLED backlit LCD TV.

[0136] To implement the method of the embodiments of this application, the embodiments of this application also provide an optical compensation device, such as... Figure 10 As shown, the optical compensation device includes:

[0137] Test unit 1001 is used to determine a first set based on a first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents the circuit characteristic parameters of the corresponding backlight partition; the first set represents the set of second parameters of a first region corresponding to each backlight partition; the first region represents the corresponding region on the display panel of the display device; the second parameter represents the optical characteristic parameters of the corresponding first region.

[0138] The adjustment unit 1002 is used to adjust the first parameter corresponding to each backlight partition in at least one backlight partition when the first set does not meet the set conditions, until the adjusted first set meets the set conditions.

[0139] In one embodiment, the set condition indicates that all first differences are less than a first threshold; the first difference indicates the difference of the second parameter corresponding to two areas on the display panel that satisfy the set positional relationship.

[0140] In one embodiment, two regions on the display panel that satisfy a predetermined positional relationship include a second region and a third region; the second region represents a first region where the center point of the display panel is located; the third region represents any first region on the display panel other than the second region; the adjustment unit 1002 is used for:

[0141] Based on the second parameters of the second region and the second parameters of the third region, adjust the first parameter of the backlight zone corresponding to the third region.

[0142] In one embodiment, the adjustment unit 1002 is used for:

[0143] If the second parameter of the third region is less than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by a first coefficient; the first coefficient is greater than 1.

[0144] If the second parameter of the third region is greater than the second parameter of the second region, the first parameter of the backlight partition corresponding to the third region is multiplied by the second coefficient; the second coefficient is less than 1.

[0145] In one embodiment, two regions on the display panel that satisfy a set positional relationship are characterized as two horizontally adjacent first regions or two vertically adjacent first regions.

[0146] In one embodiment, the adjustment unit 1002 is used for:

[0147] If the first difference is greater than the second difference, adjust the first parameter of the backlight partition corresponding to each of the two first regions that satisfy the set positional relationship;

[0148] If the first difference is not greater than the second difference, the first parameter of the backlight partition corresponding to the fourth region is adjusted according to the first difference; the fourth region represents a first region determined based on a set rule among two first regions that satisfy a set positional relationship;

[0149] The second difference represents the difference of the third parameter between two first regions that satisfy the set positional relationship; the third parameter represents the second parameter when no optical compensation is performed.

[0150] In one embodiment, the number of backlight zones in the backlight module is greater than or equal to 200.

[0151] In one embodiment, the optical compensation device further includes:

[0152] The storage unit is used to associate and store the first parameter and the fourth parameter corresponding to each backlight zone after the adjusted first set meets the set conditions; wherein the fourth parameter represents the set circuit characteristic parameter input to the display panel.

[0153] In practical applications, the test unit 1001, the adjustment unit 1002, and the storage unit can be implemented by a processor in the optical compensation device, such as a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU), or a field-programmable gate array (FPGA).

[0154] It should be noted that the optical compensation device provided in the above embodiments is only illustrated by the division of the above-described program modules. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the optical compensation device and the optical compensation method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0155] Based on the hardware implementation of the above program modules, and in order to implement the method of the embodiments of this application, the embodiments of this application also provide an electronic device. Figure 11 This is a schematic diagram of the hardware structure of the electronic device according to an embodiment of this application, as shown below. Figure 11 As shown, the electronic device includes:

[0156] Communication interface 1 enables information exchange with other devices, such as network devices;

[0157] Processor 2 is connected to communication interface 1 to enable information exchange with other devices and, when running a computer program, executes the optical compensation method provided by one or more of the above-mentioned technical solutions. The computer program is stored in memory 3.

[0158] Of course, in practical applications, the various components in an electronic device are coupled together through bus system 4. It can be understood that bus system 4 is used to achieve communication and connection between these components. In addition to the data bus, bus system 4 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 11 The general will label all buses as Bus System 4.

[0159] In this embodiment of the invention, memory 3 is used to store various types of data to support the operation of the electronic device. Examples of such data include any computer program used to operate on the electronic device.

[0160] It is understood that memory 3 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memory 2 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0161] The methods disclosed in the above embodiments of the present invention can be applied to processor 2, or implemented by processor 2. Processor 2 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 2 or by instructions in the form of software. The processor 2 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 2 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present invention can be directly manifested as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium, which is located in memory 3. Processor 2 reads the program in memory 3 and completes the steps of the aforementioned method in combination with its hardware.

[0162] When processor 2 executes the program, it implements the corresponding processes in the various methods of the embodiments of the present invention. For the sake of brevity, these will not be described in detail here.

[0163] In an exemplary embodiment, the present invention also provides a storage medium, namely a computer storage medium, specifically a computer-readable storage medium, such as a memory 3 that stores a computer program, which can be executed by a processor 2 to complete the steps described in the foregoing method. The computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM.

[0164] In the several embodiments provided in this application, it should be understood that the disclosed apparatus, terminal, and method can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0165] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0166] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0167] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

[0168] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

[0169] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An optical compensation method, characterized by, The method comprises: determining a first set based on a first parameter corresponding to each backlight partition in a backlight module of a display device; the first parameter represents a circuit characteristic parameter of the input corresponding backlight partition; the first set represents a set of second parameters corresponding to a first area of each backlight partition; the first area represents a corresponding area on a display panel of the display device; the second parameter represents an optical characteristic parameter of the corresponding first area; in a case where the first set does not satisfy a set condition, adjusting the first parameter corresponding to each backlight partition in at least one backlight partition until the first set after adjustment satisfies the set condition; wherein the set condition represents that all first differences are less than a first threshold; the first difference represents a difference between the second parameters corresponding to two areas on the display panel satisfying a set positional relationship; the two areas on the display panel satisfying the set positional relationship represent two transversely adjacent first areas or two longitudinally adjacent first areas; the adjusting the first parameter corresponding to each backlight partition in at least one backlight partition comprises: in a case where the corresponding first difference is greater than a second difference, adjusting the first parameter of the backlight partition corresponding to each first area in the two first areas satisfying the set positional relationship; in a case where the corresponding first difference is not greater than the second difference, adjusting the first parameter of the backlight partition corresponding to a fourth area according to the first difference; the fourth area represents a first area determined in the two first areas satisfying the set positional relationship based on a set rule; wherein the second difference represents a difference between third parameters of the two first areas satisfying the set positional relationship; the third parameter represents the second parameter when no optical compensation is performed.

2. The method of claim 1, wherein, The two areas on the display panel satisfying the set positional relationship include a second area and a third area; the second area represents a first area where a center point of the display panel is located; the third area represents any first area on the display panel except the second area; the adjusting the first parameter corresponding to each backlight partition in at least one backlight partition comprises: adjusting the first parameter of the backlight partition corresponding to the third area based on the second parameter of the second area and the second parameter of the third area.

3. The method of claim 2, wherein, the adjusting the first parameter of the backlight partition corresponding to the third area comprises: in a case where the second parameter of the third area is less than the second parameter of the second area, multiplying the first parameter of the backlight partition corresponding to the third area by a first coefficient; the first coefficient is greater than 1; in a case where the second parameter of the third area is greater than the second parameter of the second area, multiplying the first parameter of the backlight partition corresponding to the third area by a second coefficient; the second coefficient is less than 1.

4. The method of claim 1, wherein, The number of backlight partitions in the backlight module is greater than or equal to 200.

5. The method of claim 1, wherein, The method further comprises: after the first set after adjustment satisfies the set condition, storing the first parameter corresponding to each backlight partition after adjustment and a fourth parameter in association; wherein, the fourth parameter represents a set circuit characteristic parameter input to the display panel.

6. An optical compensation device, characterized by, The method comprises: a test unit configured to determine a first set based on a first parameter corresponding to each backlight partition in a backlight module of the display device; the first parameter represents a circuit characteristic parameter of the input corresponding backlight partition; the first set represents a set of second parameters corresponding to each first area; the first area represents a corresponding area on a display panel of the display device; the second parameter represents an optical characteristic parameter of the corresponding first area; an adjustment unit configured to adjust the first parameter corresponding to each backlight partition in at least one backlight partition until an adjusted first set meets a set condition, if the first set does not meet the set condition; the set condition represents that all first differences are less than a first threshold; the first difference represents a difference between second parameters corresponding to two areas meeting a set positional relationship on the display panel; the two areas meeting the set positional relationship represent two transversely adjacent first areas or two longitudinally adjacent first areas; the adjustment unit is further configured to adjust the first parameter of the backlight partition corresponding to each first area in the two first areas meeting the set positional relationship, if a corresponding first difference is greater than a second difference; adjust the first parameter of the backlight partition corresponding to a fourth area according to the first difference, if the corresponding first difference is not greater than the second difference; the fourth area represents a first area determined in the two first areas meeting the set positional relationship based on a set rule; the second difference represents a difference between third parameters of the two first areas meeting the set positional relationship; the third parameter represents the second parameter without optical compensation.

7. An electronic device, comprising: comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the computer program to perform the steps of the optical compensation method of any one of claims 1 to 5.

8. A storage medium having stored thereon a computer program, characterized in that the computer program is executed by the processor to perform the steps of the optical compensation method of any one of claims 1 to 5.

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