A partitioned backlight dynamic dimming method for a high-brightness direct-lit liquid crystal display screen

Abstract

The application relates to a kind of partitioned backlight dynamic light modulation methods of high-light direct type liquid crystal display screen.The method comprises the following steps: the display source data of liquid crystal display screen, partitioned operation data and optical calibration data are fused mapping in partitioned state, and the partitioned light heat display state data is obtained;Accordingly, the display brightness demand, heat bearing capacity, diffusion compensation capacity and life consumption state of each backlight partition are jointly budgeted, and the partitioned light heat life joint budget atlas is generated;Then, the heat budget shortage partition, heat budget surplus partition and migratable brightness load are determined by combining the heat margin difference and brightness load difference, and the cross-partition brightness migration path is formed through cold zone light borrowing traction analysis, and finally the dynamic condensation of each partition driving parameter is obtained, to obtain the partitioned backlight dynamic driving data.Using the method can improve the display stability of the display screen under outdoor strong light, long time operation and high dynamic picture scene.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, and in particular to a method for dynamic dimming of local backlight in a high-brightness direct-lit liquid crystal display. Background Technology

[0002] In traditional technology, local dimming of LCD screens typically involves dividing the input image into regions, statistically analyzing the grayscale values, peak brightness, average brightness, or histogram characteristics of each region, establishing a correspondence between the image regions and backlight regions, determining the target driving brightness for each region based on its displayed content, and then combining this with gamma correction, local contrast enhancement, brightness smoothing, timing filtering, and light diffusion compensation to generate the PWM duty cycle or current driving parameters for each backlight region. This allows for increased brightness in high-brightness image areas and decreased brightness in low-brightness image areas. However, traditional technology primarily focuses on adjusting local backlight based on image brightness requirements, which can lead to limited brightness compensation in areas with high loads. This results in insufficient display stability in bright outdoor light, prolonged operation, and high-dynamic-range scenes. Summary of the Invention

[0003] Therefore, it is necessary to provide a local dimming method for the backlight of a high-brightness direct-lit LCD screen that can improve the display stability of the screen in outdoor strong light, long-term operation and high dynamic scene scenarios, in order to address the above technical problems.

[0004] This application provides a method for dynamic dimming of local dimming backlight in a high-brightness direct-lit liquid crystal display, including: The display source data, partition operation data, and optical calibration data of the LCD screen are fused and mapped to obtain partition photothermal display status data. Based on the partitioned photothermal display status data, a joint budget analysis is performed on the display brightness requirements, heat carrying capacity, diffusion compensation capacity, and lifespan consumption status of each backlight partition of the liquid crystal display screen to obtain a partitioned photothermal lifespan joint budget map. Based on the joint budget map of photothermal lifetime of the partition, the thermal margin difference and brightness load difference between the backlight partitions are identified by the migration load, and the thermal budget insufficient partition, thermal budget surplus partition and the transferable brightness load data of the partition are obtained. Based on the transferable brightness load data of the partitions, a cold zone light-borrowing traction analysis is performed on the diffuse light compensation relationship, halo back projection constraint relationship and display uniformity constraint relationship between the thermal budget insufficient partitions and the thermal budget surplus partitions to obtain cross-partition brightness migration path data. Based on the cross-zone brightness migration path data, the driving parameters of each backlight zone are dynamically calculated to obtain the zone backlight dynamic driving data.

[0005] The aforementioned method for dynamic dimming of localized backlight in a high-brightness direct-lit LCD screen achieves localized state fusion mapping by integrating the display source data, localized operation data, and optical calibration data of the LCD screen. This allows backlight dimming to move beyond simply adjusting the grayscale or localized brightness of the screen. Instead, it incorporates a joint budget of screen brightness requirements, localized temperature rise, thermal load margin, diffusion compensation capability, and lifespan consumption. This enables the safe output boundary of each localized backlight zone to be determined before it enters high-brightness driving mode. Furthermore, by identifying the differences in thermal margin and brightness load between localized backlight zones, the driving pressure originally concentrated in localized high-brightness areas can be broken down into transferable brightness loads. It also distinguishes between zones with insufficient thermal budget and zones with abundant thermal budget, preventing backlight zones with high temperature, high load, or high lifespan consumption from being forced to continuously bear the full target brightness. Meanwhile, by conducting cold-zone light-borrowing traction analysis on the diffusion light compensation relationship, halo back projection constraint relationship, and display uniformity constraint relationship between thermal budget-deficient zones and thermal budget-surplus zones, the thermal budget-surplus zones can compensate for the brightness gap of thermal budget-deficient zones in a controlled diffusion light manner. This reduces dark-field edge halos, local brightness abrupt changes, and display unevenness while maintaining the target display brightness. Finally, by performing dynamic driving calculation processing on the cross-zone brightness migration path data, the driving current, PWM duty cycle, dot position, and peak output of each backlight zone can be coordinated and controlled. This achieves heat load dispersion, peak power consumption reduction, halo suppression, brightness uniformity improvement, and LED lifespan balance under high-brightness display conditions. Consequently, it can improve the display stability, reliability, and energy efficiency of high-brightness direct-lit LCD screens in outdoor strong light, long-term operation, and high dynamic scene scenarios. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is an application environment diagram of a localized backlight dynamic dimming method for a high-brightness direct-lit liquid crystal display screen in one embodiment. Figure 2 This is a flowchart illustrating a local dimming method for a high-brightness direct-lit liquid crystal display screen in one embodiment. Figure 3 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0008] 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.

[0009] This application provides a method for dynamic dimming of local dimming backlight in a high-brightness direct-lit liquid crystal display, which can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104, or it can be located in the cloud or on other network servers. Server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0010] In one exemplary embodiment, such as Figure 2 As shown, a method for dynamic dimming of local dimming backlight in a high-brightness direct-lit LCD screen is provided, which is then applied to... Figure 1 Taking the server in the example, the explanation includes the following steps 202 to 210. Wherein:

[0011] Step 202: Perform partition state fusion mapping on the display source data, partition operation data and optical calibration data of the liquid crystal display screen to obtain partition photothermal display state data.

[0012] Step 204: Based on the partitioned photothermal display status data, perform a joint budget analysis on the display brightness requirements, heat load capacity, diffusion compensation capacity, and lifespan consumption status of each backlight partition of the LCD screen to obtain a partitioned photothermal lifespan joint budget map.

[0013] Step 206: Based on the joint budget map of photothermal lifetime of each backlight zone, identify the thermal margin difference and brightness load difference between each backlight zone to obtain the thermal budget insufficient zone, thermal budget surplus zone, and the transferable brightness load data of each zone.

[0014] Step 208: Based on the transferable brightness load data of each zone, perform cold zone light borrowing traction analysis on the diffused light compensation relationship, halo back projection constraint relationship and display uniformity constraint relationship between zones with insufficient thermal budget and zones with abundant thermal budget, and obtain cross-zone brightness migration path data.

[0015] Step 210: Based on the cross-zone brightness migration path data, perform dynamic driving calculation on the driving parameters of each backlight zone to obtain the zone backlight dynamic driving data.

[0016] Among them, display source data refers to the data used to determine the current display requirements of the LCD screen, including image grayscale, brightness distribution, HDR brightness information, ambient light compensation information, and frame timing information.

[0017] Among them, the partition operation data refers to the status data of each backlight partition during the working process, including partition temperature, current, voltage, PWM duty cycle, cumulative lighting time, temperature rise rate, and historical peak driving status, etc.

[0018] Among them, optical calibration data refers to the optical propagation characteristics data between backlight zones obtained through pre-calibration, including diffusion nuclei, crosstalk coefficient, film gain, edge attenuation coefficient, halo diffusion range, and liquid crystal transmittance correction parameters.

[0019] Among them, the partition state fusion mapping refers to the unified mapping of display source data, partition operation data and optical calibration data to the backlight partition coordinate system, so that each backlight partition forms a calculable light, heat, driving and diffusion state.

[0020] Among them, the partitioned photothermal display status data refers to the data formed after partitioned status fusion mapping, which describes the current display brightness requirements, operating thermal status, driving load status and optical diffusion status of each backlight partition.

[0021] Backlight partitioning refers to the areas with independently adjustable brightness formed by dividing the direct-lit LED or Mini-LED backlight array according to its spatial location and drive control unit.

[0022] Among them, display brightness requirement refers to the target brightness that a certain backlight zone needs to provide to meet the requirements of the current screen content, ambient light conditions and liquid crystal transmittance.

[0023] Among them, thermal load capacity refers to the brightness output capacity that a certain backlight zone can safely withstand under the current temperature, heat dissipation conditions, thermal resistance structure and the influence of adjacent thermal coupling.

[0024] Among them, diffusion compensation capability refers to the ability of a certain backlight zone to provide effective brightness compensation to other zones through the diffuser plate, optical film system and liquid crystal transmission path without exceeding its own safe output boundary.

[0025] Among them, the lifespan consumption status refers to the degree of lifespan usage and remaining output capacity of a certain backlight zone due to cumulative lighting, high current drive, temperature aging and light decay compensation.

[0026] Among them, joint budget analysis refers to putting display brightness requirements, heat load capacity, diffusion compensation capacity and lifespan consumption status into the same constraint system, and uniformly calculating the budget relationship of each backlight zone that can be directly output, can be borrowed for compensation, and requires external compensation.

[0027] Among them, the regional photothermal lifetime joint budget map refers to the data map formed after joint budget analysis, which simultaneously includes the brightness budget, thermal safety budget, diffusion compensation budget, lifetime budget, and cross-regional compensation relationship of each backlight zone.

[0028] Among them, thermal margin difference refers to the differences between different backlight zones in terms of remaining heat dissipation capacity, temperature rise margin, thermal safety boundary and sustainable output capacity.

[0029] Among them, brightness load difference refers to the differences between different backlight zones in terms of target brightness requirements, actual bearable brightness, and amount of brightness compensation.

[0030] Among them, the migration load identification refers to the process of determining which backlight zones need to release the brightness load, which backlight zones can bear the compensation brightness, and the amount of brightness that can be migrated between the two, based on the differences in thermal margin and brightness load.

[0031] Among them, insufficient thermal budget zone: refers to a backlight zone where the target brightness demand exceeds its own safe output capacity, or where continuing to drive at high brightness will cause overheating, excessive lifespan consumption, or increased thermal risk.

[0032] Among them, the thermal budget surplus zone refers to the backlight zone with a low current temperature, sufficient heat dissipation margin, low lifespan consumption, and diffusion compensation capability.

[0033] Among them, the transferable luminance load data of a zone refers to the data formed after the transfer load is identified, which is used to record the transferable luminance amount, compensation direction and candidate matching relationship between zones with insufficient thermal budget and zones with surplus thermal budget.

[0034] Among them, the diffused light compensation relationship refers to the corresponding relationship in which the light emitted from the thermal budget surplus zone, after propagation through the diffuser plate, optical film system and liquid crystal panel, forms an effective brightness compensation for the thermal budget deficit zone.

[0035] Among them, the halo back projection constraint relationship refers to the constraint relationship that maps the halo influence range that the candidate compensation light may cause to the dark field edge, high contrast area and fine line area in reverse, and restricts the compensation path or compensation intensity accordingly.

[0036] Among them, the uniformity constraint relationship refers to the constraint relationship used to limit the brightness gradient, grayscale continuity, local Mura, edge transition width and regional brightness smoothness during cross-zone compensation.

[0037] Among them, the cold zone light-borrowing traction analysis refers to the analysis process of determining the cross-zone compensation path for the zone with insufficient heat budget by taking the zone with surplus heat budget as the cold zone that can borrow light, and through diffuse light compensation, halo limitation and uniformity constraint.

[0038] Among them, cross-zone brightness migration path data refers to the data formed after cold zone light-borrowing traction analysis, which is used to record the starting zone for light borrowing, the target zone for light receiving, the amount of migrated brightness, the compensation path, the compensation weight, and the path priority.

[0039] Among them, driving parameters refer to the parameters used to control the actual light emission state of each backlight zone, including driving current, PWM duty cycle, dot position, pulse width, peak limiting parameters, and phase offset, etc.

[0040] Among them, dynamic drive calculation processing refers to the collaborative calculation processing of brightness migration responsibility into drive current, PWM duty cycle, point position and limiting parameters that can be executed by each backlight zone, based on cross-zone brightness migration path data.

[0041] Among them, the dynamic driving data for the backlight zones refers to the data formed after dynamic driving calculation and is used to directly control the luminous intensity, lighting sequence, compensation output and peak limit of each backlight zone in the current control cycle.

[0042] Specifically, a correspondence table between pixel coordinates and backlight zone coordinates is established according to the physical partition layout of the LCD screen. Frame brightness, grayscale distribution, HDR peak area, and ambient light compensation in the display source data are uniformly converted to the backlight zone coordinate system. Temperature sampling points, current sampling points, voltage sampling points, cumulative illumination time, and historical peak drive counts in the zone operation data are then mapped to the corresponding backlight zones according to sensor installation location, LED series-parallel structure, and backplate heat conduction path. Simultaneously, diffusion kernels, crosstalk coefficients between adjacent zones, diaphragm directional gain, edge attenuation coefficient, and halo diffusion radius from the optical calibration data are loaded into the optical coordinate layer of the corresponding zone. Time synchronization and spatial registration are performed on these three types of data to ensure that image frames, temperature response, drive response, and optical diffusion relationships are within the same control cycle. For zones not covered by sensors, interpolation correction is performed based on adjacent temperature points, backplate heat conduction direction, and LED arrangement density, ultimately forming zoned photothermal display status data that simultaneously includes screen brightness requirements, operating thermal status, drive load status, and optical diffusion status.

[0043] For each backlight zone, the display brightness requirement within the current control cycle is calculated, determined by the corresponding screen brightness, ambient light compensation coefficient, LCD panel transmittance, and target readable brightness. Then, the zone's thermal carrying capacity is calculated based on its real-time temperature, temperature rise rate, thermal resistance of the heat dissipation structure, thermal superposition between adjacent zones, and the upper limit of the allowable junction temperature. The lifetime consumption status is then calculated by combining the cumulative LED lighting time, historical high-current drive cycles, light decay compensation coefficient, and temperature aging weight. Next, the diffusion kernel matrix, crosstalk coefficients of adjacent zones, and directional film gain from the optical calibration data are introduced into the budget model to calculate the diffusion compensation capacity that each zone can provide to surrounding zones without exceeding its own safe output boundary. Finally, the display brightness requirement, thermal carrying capacity, diffusion compensation capacity, and lifetime consumption status are placed into the same zone budget matrix for constraint coupling, allowing each zone to simultaneously obtain its own achievable brightness, externally borrowable compensation brightness, externally compensated brightness, and lifetime-limited brightness, thereby generating a joint budget map of the zone's photothermal lifetime.

[0044] Based on the zonal safe output budget, zonal display brightness requirements, zonal temperature rise rate, zonal lifetime limit brightness, and zonal diffusion compensation margin in the zonal photothermal lifetime joint budget map, a difference relationship is established between the "currently directly bearable brightness" and the "currently required brightness" for each backlight zone. When the required brightness of a backlight zone is higher than its directly bearable brightness, or when the backlight zone can reach the target brightness for a short time but its temperature rise rate, cumulative lifetime consumption, or adjacent heat superposition is close to the preset safety boundary, it is judged as a zone with insufficient thermal budget. The brightness that cannot be safely borne by this zone, the brightness that needs to be released due to peak clipping and heat limiting, and the brightness that needs to be moved out due to lifetime protection are combined and calculated as the brightness load to be migrated. At the same time, the remaining brightness capacity of the other backlight zones is calculated by deducting the display brightness requirements, reserved thermal safety margin, and lifetime protection margin from the safe output budget. When the remaining brightness capacity meets the diffusion compensation requirements and its temperature rise trend is lower than the thermal equilibrium threshold, it is judged as a zone with surplus thermal budget. Subsequently, load migration pairing relationships are established based on the spatial distance, diffusion accessibility, compensation brightness matching degree, adjacent thermal coupling strength, and partition lifetime weight between thermal budget-insufficient partitions and thermal budget-excess partitions. Each brightness load to be migrated corresponds to one or more excess partitions that can bear compensation. The amount of migrated brightness, the allowable compensation limit, the thermal safety retention amount, and the candidate migration priority are configured for each pairing relationship. Finally, the partition migrated brightness load data containing the migrated brightness load relationship between thermal budget-insufficient partitions and thermal budget-excess partitions is formed.

[0045] For each group of thermally insufficient and thermally abundant zones, the effective brightness contribution of the thermally abundant zone to the thermally insufficient zone after passing through the diffuser, brightness enhancement film, prism film, and liquid crystal transmittance under different driving amplitudes is calculated. The compensable intensity is determined by combining distance attenuation, angle attenuation, and film system directional gain. Then, the diffusion range of the candidate compensation light on the panel display area is back-projected to the dark field boundary, high-contrast edge, fine text line area, and low grayscale gradient area of ​​the current frame, forming a halo back-projection constraint relationship. Any path where the compensation light would form a significant bright edge, hazy edge, or abrupt transition in the dark field has its traction weight reduced or is set as a disabled path. Next, a display uniformity constraint relationship is added to the traction process, coordinating the brightness gradient between adjacent zones, the local uniformity after compensation, the edge transition smoothness, and the regional brightness continuity to ensure that brightness compensation does not come at the cost of generating new muras or edge abrupt changes. Finally, among the candidate relationships where the diffusion compensation capability is sufficient, the halo risk is limited, and the uniformity constraints are met, the cross-zone brightness migration direction, migration intensity, and compensation weight are locked to obtain the cross-zone brightness migration path data.

[0046] Based on the cross-zone brightness migration path data, the brightness load ratio of each backlight zone in the current control cycle is determined. This includes the brightness load of the zone itself, the diffusion compensation load provided to zones with insufficient thermal budget, and the output amount that needs to be deducted due to halo or thermal limitations. The brightness load ratio is converted into drive current, PWM duty cycle, point position, and peak limiting parameters. Multiple high-brightness zones are staggered according to the instantaneous power supply capacity, the thermal coupling relationship between adjacent zones, and the frame refresh sequence, so that adjacent high-brightness zones do not reach peak output simultaneously in the same time window. For zones with insufficient thermal budget, their direct drive duty cycle or peak current is reduced, and the corresponding thermal budget surplus zone in the migration path increases the controlled output according to the compensation weight. For surplus zones, the compensation output is jointly limited by halo constraints, uniformity constraints, and lifetime weights. Finally, the current amplitude, PWM width, phase offset, peak limiting, and compensation weights of each zone are integrated into zone backlight dynamic drive data that can be executed by the zone drive circuit, so that the backlight array can achieve thermal load transfer, halo suppression, uniformity maintenance, and lifetime balance while meeting the screen brightness requirements.

[0047] In the aforementioned method for dynamic dimming of localized backlight in a high-brightness direct-lit LCD screen, the display source data, localized operation data, and optical calibration data of the LCD screen are fused and mapped to localized states. This allows backlight dimming to no longer be adjusted solely based on screen grayscale or localized brightness, but instead incorporates screen brightness requirements, localized temperature rise status, thermal load margin, diffusion compensation capability, and lifespan consumption status for joint budgeting. This enables the safe output boundary of each localized backlight zone to be determined in advance before it enters high-brightness driving. Furthermore, by identifying the differences in thermal margin and brightness load between localized backlight zones, the driving pressure originally concentrated in localized high-brightness areas can be broken down into transferable brightness loads. This also distinguishes between zones with insufficient thermal budget and zones with abundant thermal budget, preventing backlight zones with high temperature, high load, or high lifespan consumption from being forced to continuously bear the full target brightness. Meanwhile, by conducting cold-zone light-borrowing traction analysis on the diffusion light compensation relationship, halo back projection constraint relationship, and display uniformity constraint relationship between thermal budget-deficient zones and thermal budget-surplus zones, the thermal budget-surplus zones can compensate for the brightness gap of thermal budget-deficient zones in a controlled diffusion light manner. This reduces dark-field edge halos, local brightness abrupt changes, and display unevenness while maintaining the target display brightness. Finally, by performing dynamic driving calculation processing on the cross-zone brightness migration path data, the driving current, PWM duty cycle, dot position, and peak output of each backlight zone can be coordinated and controlled. This achieves heat load dispersion, peak power consumption reduction, halo suppression, brightness uniformity improvement, and LED lifespan balance under high-brightness display conditions. Consequently, it can improve the display stability, reliability, and energy efficiency of high-brightness direct-lit LCD screens in outdoor strong light, long-term operation, and high dynamic scene scenarios.

[0048] In an exemplary embodiment, based on the zone-transferable brightness load data, a cold-zone light-borrowing traction analysis is performed on the diffuse light compensation relationship, halo back-projection constraint relationship, and display uniformity constraint relationship between zones with insufficient thermal budget and zones with abundant thermal budget to obtain cross-zone brightness migration path data, including steps 302 to 306. Wherein:

[0049] Step 302: Based on the transferable luminance load data of the partition, perform halo domain inversion casting boundary processing on the halo back projection constraint relationship to obtain the borrowed light forbidden shadow domain data.

[0050] Step 304: Based on the data of the forbidden shadow field of the light-borrowing area, perform uniformity corridor weaving processing on the display uniformity constraint relationship to obtain the light-borrowing uniform corridor data.

[0051] Step 306: Based on the light-equalizing corridor data, perform cold source compensation path locking processing on the diffused light compensation relationship to obtain cross-zone brightness migration path data.

[0052] Among them, the halo domain inversion casting boundary processing refers to the process of inverting the halo influence range that the potential compensation light may form and solidifying it as a no-entry or limit boundary based on the zonal transferable brightness load data.

[0053] Among them, the data of the restricted area for light borrowing refers to the data of high-risk halo areas formed after the halo domain inversion casting boundary processing, which is used to limit the entry of halo areas or the reduction of compensation intensity during the cross-zone light borrowing process.

[0054] Among them, the uniform field corridor weaving process refers to the process of constructing a light-borrowing corridor with continuous brightness transition and stable compensation direction according to the display uniformity constraint relationship, while avoiding the forbidden light-borrowing shadow domain.

[0055] Among them, the light-balanced corridor data refers to the data of the location, width, direction and compensation ratio of the corridor formed after the uniform field corridor weaving process, which is used to limit the smooth compensation from the thermal budget surplus zone to the thermal budget deficit zone.

[0056] Among them, the cold source compensation path locking process refers to the process of locking the specific path, compensation intensity and priority of providing diffuse light compensation from the thermal budget surplus zone to the thermal budget deficit zone based on the light borrowing balance corridor data and diffuse light compensation relationship.

[0057] Specifically, based on the thermal budget-deficient zones, thermal budget-surplus zones, and the amount of luminance to be transferred between them already formed in the transferable luminance load data of the zones, a spatial correspondence and luminance compensation amplitude of candidate light-borrowing pairs are established. Based on this, the diffused light generated by each candidate thermal budget-surplus zone under different driving intensities is back-mapped to the liquid crystal display area according to the diffuser plate scattering angle, brightness enhancement film directional gain, liquid crystal panel transmittance, zone spacing, and edge attenuation coefficient. The luminance intrusion range of this diffused light in dark areas, high contrast boundaries, text edges, fine lines, and low grayscale gradient areas is calculated. Then, according to the halo back-projection constraint relationship, the luminance increase, edge gradient change, dark field contrast loss, and neighborhood crosstalk intensity within the diffused light intrusion range are restricted. Directions, segments, luminance amplitudes, and compensation combinations exceeding the halo allowable threshold are defined as shadow domains where light borrowing is prohibited or limited. Finally, light-borrowing forbidden shadow domain data including forbidden position, forbidden direction, forbidden luminance upper limit, and forbidden boundary thickness are obtained.

[0058] Using the restricted light-borrowing shadow domain data as a shielding boundary, compensation areas that may cause halo diffusion, whitening in dark areas, or bright edges are excluded from the candidate light-borrowing space, while retaining usable areas that can form a continuous brightness transition between thermally insufficient and thermally abundant zones. Based on display uniformity constraints, uniform constraints are applied to the brightness gradient between adjacent backlight zones within the remaining usable area, the continuity of grayscale before and after compensation, the smoothness of regional brightness, the risk of local mura, and the width of edge transition. This ensures that the light-borrowing compensation channel cannot cross locations with excessive brightness abrupt changes, nor can it form new brightness creases within the originally uniform display area. Then, according to the brightness gap direction of the thermally insufficient zone and the compensable direction of the thermally abundant zone, multiple candidate light-borrowing corridors are constructed within the usable area. The brightness transition continuity, lateral diffusion width, vertical compensation attenuation, and overlap of adjacent corridors of each candidate corridor are balanced, allowing the diffusion compensation of multiple abundant zones to gradually merge into the insufficient zone. Finally, light-borrowing balanced corridor data that avoids the restricted light-borrowing shadow domain while satisfying display uniformity constraints is obtained.

[0059] The feasible channels for providing diffused light compensation from thermally budget-deficient zones to thermally budget-deficient zones are defined using light-borrowing equalization corridor data. Within each corridor, the output brightness, optical propagation attenuation, effective incident brightness of the target area, and residual brightness gap after compensation are calculated according to the diffused light compensation relationship. Compensation combination calculations are performed on multiple candidate surplus zones corresponding to the same thermally budget-deficient zone to ensure that the diffused light contribution of each surplus zone, when superimposed within the target area, meets the brightness gap without exceeding the corresponding surplus zone's thermal budget, lifetime budget, and drive limit. Then, based on corridor length, diffusion efficiency, compensation stability, thermal interference level, and path intersection, candidate compensation paths are prioritized and locked. Paths with low compensation efficiency, strong thermal coupling, or those prone to causing excessive brightness due to corridor overlap are downweighted or excluded. Finally, cross-zone brightness migration path data is formed, including the light-borrowing starting zone, the light-receiving target zone, the amount of migrated brightness, the compensation weight, the path direction, the compensation limit, and the path priority.

[0060] In this embodiment, by first performing halo domain inversion casting boundary, compensation areas prone to halo generation can be excluded before calculating the light-borrowing path; then, by using shimming corridor weaving, the range of available light is limited to an area with continuous brightness transition without disrupting uniformity; finally, by using cold source compensation path locking, the compensation direction, compensation intensity, and path priority of the thermal budget surplus zone to the thermal budget deficit zone are determined, thereby reducing invalid path calculations, reducing local bright spots, compensation faults, and path jitter, and improving the stability and controllability of cross-zone brightness migration.

[0061] In an exemplary embodiment, based on the partitioned transferable luminance load data, the halo back-projection constraint relationship is subjected to halo domain inversion casting boundary processing to obtain the borrowed light forbidden shadow domain data, including steps 402 to 406. Wherein:

[0062] Step 402: Perform halo source inversion on the halo source data to be migrated in the migrateable luminance load data of the partition to obtain the halo source data to be reversed.

[0063] Step 404: Based on the halo source data to be inverted, perform inverse domain expansion of the halo inversion constraint relationship to obtain the inversion halo boundary data.

[0064] Step 406: Perform forbidden boundary processing on the reverse projection halo boundary data to obtain the borrowed light forbidden shadow domain data.

[0065] Among them, the brightness load data to be migrated refers to the brightness load data that the thermal budget-insufficient zone cannot continue to safely bear and needs to be transferred to the thermal budget-excess zone through diffused light compensation.

[0066] Among them, halo source reverse association refers to the process of reversely associating the brightness load to be migrated with the compensation zone, compensation direction, compensation intensity and range of effect that may generate halo.

[0067] Among them, the halo source data to be reversed refers to the data formed after the halo source is reversed, which is used to record the potential halo source partition, the corresponding compensation load, the compensation direction and the estimated halo influence range.

[0068] Among them, reverse domain spreading refers to the process of extrapolating the diffusion effect of potential halo sources from the compensation path to the dark field boundary, high contrast edge or fine line region based on the halo back projection constraint relationship.

[0069] Among them, the reverse projection halo boundary data refers to the halo boundary data formed after inverse domain spreading, which is used to limit the brightness intrusion, edge whitening or contrast loss that compensation light may cause.

[0070] Among them, the prohibited casting boundary treatment refers to solidifying the area with a high risk of halo in the reverse projection halo boundary into a boundary shadow domain that prohibits or limits light borrowing, so as to constrain the subsequent light borrowing path generation process.

[0071] Specifically, each piece of brightness load data to be migrated in the transferable brightness load data of the partition is used as the calculation object, and its corresponding thermal budget insufficient partition, candidate thermal budget surplus partition, brightness amount to be compensated, allowable migration upper limit and compensation direction are paired and numbered. Then, according to the expected driving increment when the candidate thermal budget surplus partition provides compensation to the thermal budget insufficient partition, the light diffusion radius, boundary brightness increase and dark field intrusion intensity of the compensation increment in the transmission path of the backlight diffuser, brightness enhancement film, prism film and liquid crystal panel are calculated. Then, the compensation load that may cause dark field bright edge, high contrast edge whitening, text edge blurring or local gray level increase is reverse-linked with its corresponding candidate surplus partition, so that each brightness load to be migrated is associated with the emitting partition, emitting direction, compensation amplitude and range of effect that may produce halo, to obtain the halo source data to be reverse-projected.

[0072] Starting with the luminous partition position and compensation amplitude in the halo source data to be projected backwards, the reverse influence range of the compensation light in the liquid crystal display area is calculated layer by layer according to the preset light diffusion kernel, crosstalk coefficient, film system directional gain, edge attenuation coefficient, and liquid crystal transmittance in the halo reverse projection constraint relationship. For dark field areas, high contrast boundary areas, thin line pattern areas, and low grayscale gradient areas, different brightness intrusion thresholds and edge gradient thresholds are configured respectively, and the halo boundary position is determined according to the brightness increase, grayscale transition change, and neighborhood contrast loss after the compensation light reaches each area. When the reverse diffusion ranges of multiple halo sources to be projected backwards overlap, the boundaries are merged or expanded according to the superimposed brightness, overlapping area, and edge sensitivity to obtain the reverse projection halo boundary data.

[0073] Based on the brightness increase, dark field contrast loss, edge gradient abruptness, and overlap with candidate light-borrowing directions in the back-projection halo boundary data, corresponding exclusion and limiting levels are configured for each boundary region. For regions where the brightness increase exceeds the allowable threshold for dark fields, the edge gradient abruptness exceeds the visual smoothing threshold, or overlaps with text edges or high-contrast boundaries, their corresponding compensation directions and compensation path segments are set to exclusion status. For regions that do not meet the complete exclusion conditions but pose a visible halo risk, the upper limit of compensation brightness, boundary buffer width, and transition attenuation coefficient are configured according to their halo intensity, so that subsequent light-borrowing compensation can only pass through in a low-amplitude, gradual manner when approaching this region. Subsequently, adjacent or overlapping exclusion boundaries are continuously closed and thickened to eliminate isolated breakpoints and narrow slit channels, forming exclusion shadow domains covering dark field sensitive areas, high-contrast edge areas, and locally fragile transition areas, thus obtaining light-borrowing exclusion shadow domain data.

[0074] In this embodiment, by performing halo source inversion on the brightness load data to be migrated, the compensation load that may cause halo can be associated with the corresponding luminous partition, compensation direction and compensation magnitude in advance; then, through inverse domain expansion, the potential halo influence range is extended in reverse into a calculable halo boundary; finally, through forbidden boundary casting processing, the scattered high-risk boundaries are transformed into a light-borrowing forbidden shadow domain that can be called upon for subsequent dimming, thereby avoiding high-risk compensation paths from entering the dark field edge, text boundary and high contrast transition area, and improving the pre-emptiveness of halo suppression and the accuracy of boundary control.

[0075] In an exemplary embodiment, based on the borrowed light forbidden shadow domain data, a uniformity constraint relationship is subjected to a uniform corridor weaving process to obtain borrowed light uniform corridor data, including steps 502 to 508. Wherein:

[0076] Step 502: Based on the forbidden shadow domain data, perform forbidden domain stripping on the display uniformity constraint relationship to obtain the weavable uniform field bottom domain data.

[0077] Step 504: Perform uniform difference folding processing on the brightness uniformity fracture area in the weaveable uniform field bottom domain data to obtain uniform stitch node data.

[0078] Step 506: Based on the uniformity stitching node data, the corridor-oriented filament arrangement is performed on the weavable uniform field bottom domain data to obtain candidate light-borrowing corridor data.

[0079] Step 508: Perform steady-state locking on the candidate light-borrowing corridor data to obtain light-borrowing balanced corridor data.

[0080] Among them, forbidden area stripping refers to the process of excluding or limiting areas that are prone to halos, bright edges, or whitening of dark fields from the range of available light shimming based on the data of the forbidden area of ​​light-borrowed shadow field.

[0081] Among them, the weavable uniform field bottom domain data refers to the data formed after forbidden domain stripping, which is used to limit the subsequent light-borrowing corridor to be constructed only in areas with continuous brightness transition and controlled halo risk.

[0082] Among them, the brightness uniformity fracture region refers to the area in the weavable uniform field bottom domain that may form bright spots, dark seams or muras due to abrupt changes in brightness gradient between adjacent zones, discontinuous compensation ability or uneven grayscale transition.

[0083] Among them, the uniform difference folding treatment refers to the process of segmenting and gradually reconstructing the brightness difference in the brightness uniformity fracture area, so that the abrupt brightness difference is transformed into a gradually changing node that can be continuously compensated.

[0084] Among them, uniform stitching node data refers to the data formed after uniform difference stitching, which is used to record the position of brightness transition nodes, compensation ratio, transition width and brightness gradient limit.

[0085] Among them, the corridor-direction wire arrangement refers to the process of arranging candidate light-borrowing channels in the direction of smooth brightness transition, low thermal interference, and avoiding forbidden shadow regions within the weavable uniform field bottom domain, based on the uniformity stitching node data.

[0086] Among them, candidate light-borrowing corridor data refers to the data formed after the corridor is arranged with connecting wires, which is used to record the starting point, ending point, width, deflection direction, segment compensation ratio and node connection relationship of the light-borrowing corridor.

[0087] Among them, corridor steady-state locking refers to the process of stabilizing and constraining the direction, width, compensation intensity and inter-frame variation amplitude of the candidate light-borrowing corridor, so that the final corridor remains smooth and controllable during continuous dimming.

[0088] Specifically, using the forbidden position, forbidden direction, forbidden level, limiting threshold, and boundary buffer width recorded in the forbidden shadow domain data as constraint boundaries, the compensable area in the display uniformity constraint relationship is divided into a completely forbidden area, a limiting transition area, and a shimming area. For the completely forbidden area, its corresponding borrowing direction, compensation path segment, and brightness superposition range no longer participate in the subsequent corridor construction; for the limiting transition area, the maximum allowable compensation brightness, boundary attenuation slope, and minimum transition width are configured according to the forbidden level, so that the compensation light can only participate in the brightness transition in a low amplitude and gradual manner when passing through this area; for the shimming area, a passable uniformity calculation grid is re-established based on the brightness gradient, grayscale continuity, regional uniformity threshold, and allowable Mura threshold of the adjacent backlight partitions, forming a woven shimming base domain data that has excluded high halo risk areas and still maintains the ability to continuously adjust brightness.

[0089] The model performs differential calculations on the locations of abrupt changes in brightness gradients between adjacent backlight zones, discontinuous grayscale transitions before and after compensation, and local brightness collapse locations within the woven uniform field base domain data. Brightness differences, grayscale change slopes, differences in compensation capabilities between adjacent zones, and permissible visual transition widths are all incorporated into the folding model. For regions with excessively steep brightness changes, the folding model breaks down the abrupt brightness difference into multiple gradually transitioning segments by adding transition nodes, extending the compensation attenuation distance, or distributing the compensation ratio among adjacent zones. For regions with insufficient local compensation, the folding model configures stitching nodes around them to accommodate the brightness transition, allowing the compensation light to smoothly transition brightness before entering zones with insufficient thermal budget. The final result is uniform stitching node data that includes node positions, node compensation ratios, node transition widths, and node brightness gradient limitations.

[0090] Using the stitching nodes in the uniform stitching node data as connection fulcrums, multiple candidate corridor directions are established within the woven uniform field bottom domain data according to the compensation direction from the thermal budget surplus zone to the thermal budget deficit zone. For each candidate corridor direction, they are arranged according to the zone spacing, diffusion attenuation, brightness transition slope, node continuity, deflection angle to bypass the forbidden shadow domain, and overlap width between adjacent corridor directions. This ensures that the compensation light does not directly cross the high-risk area along the shortest path, but gradually merges into the target area along a direction with smoother brightness changes, lower thermal interference, and safer halo boundaries. However, when multiple corridor directions serve the same thermal budget deficit zone simultaneously, they are arranged according to the compensation capacity, path length, lateral diffusion width, and node carrying capacity of each corridor direction. Combining the two cases, candidate light-borrowing corridor data including corridor start point, corridor end point, corridor width, corridor direction deflection amount, and segmented compensation ratio are obtained.

[0091] For each candidate corridor in the candidate light-borrowing corridor data, the changes in compensation intensity, path direction, corridor width, and adjacent corridor overlap are calculated within a continuous control cycle. Stabilization constraints are then applied to the candidate corridors based on path stability thresholds, brightness fluctuation thresholds, thermal load fluctuation thresholds, and halo boundary safety margins. For corridors with high compensation efficiency but significant path jitter, inter-frame jumps are reduced by limiting the corridor direction switching frequency, fixing key stitching nodes, and compressing the compensation amplitude change rate. For regions where multiple corridors intersect or overlap excessively, corridors are merged, split, or limited according to compensation priority and brightness uniformity thresholds. This ensures that the final retained corridors meet the brightness transition requirements of areas with insufficient thermal budgets without creating bright spots, dark seams, or compensation breaks in local areas, ultimately yielding light-borrowing balanced corridor data suitable for cold source compensation path-locking processing.

[0092] In this embodiment, by first performing forbidden area stripping, high-risk halo areas can be separated from areas that can participate in uniformity compensation, avoiding interference from the forbidden shadow domain in display uniformity adjustment; then, by using uniform difference folding processing, the brightness uniformity fracture area is transformed into a continuously transitionable stitching node, reducing the probability of brightness discontinuity and local mura during the compensation process; subsequently, by using corridor-direction tufting arrangement, the light borrowing compensation forms a continuous corridor direction along the stitching node, instead of abruptly jumping between zones; finally, by using corridor steady-state locking, the compensation direction, width, and intensity of the candidate corridor are stabilized, thereby improving the brightness transition continuity, inter-frame stability, and regional display consistency during the cross-zone light borrowing process.

[0093] In an exemplary embodiment, based on the light-borrowing equalization corridor data, cold source compensation path-locking processing is performed on the diffused light compensation relationship to obtain cross-zone brightness migration path data, including steps 602 to 604. Wherein:

[0094] Step 602: Based on the light-equalization corridor data, perform back-calculation of the compensation window for the diffused light compensation relationship to obtain the cold source compensation window data.

[0095] Step 604: Based on the cold source compensation window data, perform compensation path locking on the diffuse light compensation relationship to obtain cross-zone brightness migration path data.

[0096] Among them, the compensation window back calculation refers to the process of calculating the window position, window width and allowable compensation intensity of the thermal budget surplus zone that can be used for output compensation light based on the spatial range of the light borrowing equalization corridor, the brightness transition requirements and the diffusion light compensation relationship.

[0097] Among them, cold source compensation window data refers to the data formed after the compensation window is back-calculated, which is used to record the light output window, compensation brightness limit, boundary buffer amount, compensation direction and compensation priority of the thermal budget surplus zone.

[0098] Among them, compensation path locking refers to the process of fixing the compensation channel, compensation intensity, and execution order of the thermal budget surplus partition to the thermal budget insufficient partition as an executable cross-partition brightness migration path based on the cold source compensation window data and diffuse light compensation relationship.

[0099] Specifically, using the stable corridor start point, corridor end point, corridor width, corridor deflection, stitching node position, and segmented compensation ratio from the light-equalizing corridor data as constraints, the luminescent area that thermal budget surplus zones can participate in compensation is limited to the spatial window that the corridor can pass through. Based on the diffusion core radius, zone spacing, film system directional gain, diffusion attenuation coefficient, liquid crystal transmittance, and brightness transition requirements of each stitching node within the corridor, the effective light emission range, light emission intensity range, and light emission angle range required by each thermal budget surplus zone to reach the target compensation brightness are calculated in reverse. For cases where multiple thermal budget surplus zones jointly compensate within the same corridor, different compensation window sizes and brightness upper limits are allocated according to the remaining thermal budget, available driving margin, lifetime protection margin, and effective diffusion contribution ratio of each surplus zone to the target area. For windows near the forbidden shadow region or uniformity stitching nodes, the boundary buffer width and brightness gradient slope are set to ensure that the compensation light does not break the halo limit or disrupt the brightness continuity when entering the corridor. Finally, cold source compensation window data including compensation window position, window width, allowable light intensity, window boundary buffer amount and window compensation priority are obtained.

[0100] The cold source compensation window data defines the light output windows that can participate in compensation for each thermal budget surplus partition. Based on the diffuse light compensation relationship, the effective brightness contribution, propagation attenuation, boundary diffusion, and compensation remainder of each window after propagation through the corridor to the thermal budget deficit partition are calculated. Then, multiple compensation windows are combined and matched according to the brightness gap of the thermal budget deficit partition, ensuring that the compensated brightness between windows forms a continuous superposition within the target area, while simultaneously satisfying the drive limit, thermal safety margin, lifetime limit, and corridor uniformity constraints of each surplus partition. For multiple candidate paths with similar compensation efficiency, paths with shorter path lengths, weaker thermal coupling, larger halo boundary margins, and smaller inter-frame directional changes are prioritized. Path intersections, localized over-brightness, and over-reliance on a single surplus partition are addressed with amplitude limiting or diversion. Finally, the constraint-checked compensation windows are bound by the starting partition, target partition, corridor segment, compensation intensity, and path priority to form initial cross-partition brightness migration path data. Then, each brightness load to be migrated corresponds to a clearly defined cold source compensation source, compensation channel, compensation amplitude, and execution order to obtain the final cross-partition brightness migration path data.

[0101] In this embodiment, by back-calculating the compensation window, the light output range, compensation intensity, and boundary buffer amount of the thermal budget surplus zone can be pre-defined within the already stable light-borrowing equalization corridor. This allows diffuse light compensation to no longer use the entire surplus zone as a coarse-grained output unit, but rather participate in brightness migration in a controlled window manner. Furthermore, by locking the compensation path, the diffuse light compensation relationship between the cold source compensation window and the target thermal budget insufficient zone is fixed as a clear compensation channel, compensation amplitude, and execution priority. This reduces compensation light spillover, path intersection, and redundant compensation, thereby improving the accuracy of the brightness migration path, execution stability, and drive control efficiency.

[0102] In an exemplary embodiment, based on the partitioned photothermal display status data, a joint budget analysis is performed on the display brightness requirements, heat carrying capacity, diffusion compensation capability, and lifespan consumption status of each backlight partition of the liquid crystal display screen to obtain a partitioned photothermal lifespan joint budget map, including steps 702 to 704. Wherein:

[0103] Step 702: Based on the partitioned photothermal display status data, perform a reverse rating analysis on the lifespan consumption status and thermal load capacity of each backlight partition to obtain partitioned safe output budget data.

[0104] Step 704: Based on the partition security output budget data, perform a collaborative quota analysis on the display brightness requirements and diffusion compensation capabilities of each backlight partition to obtain a joint budget map of partition photothermal lifetime.

[0105] Among them, reverse rating analysis refers to determining the safe output boundary of each backlight zone based on its lifespan consumption status and heat load capacity before allocating display brightness, so as to avoid subsequent dimming exceeding the safe load of the zone.

[0106] Among them, the zone safety output budget data refers to the data formed after reverse rating analysis, which is used to limit the direct output brightness, peak output brightness, external compensation brightness, and thermal life margin that each backlight zone can retain.

[0107] Among them, collaborative quota analysis refers to the joint allocation of the display brightness requirements and diffusion compensation capabilities of each backlight zone under the constraint of the zone's safe output budget, so that the brightness bearing and cross-zone compensation bearing are coordinated and matched within a safe range.

[0108] Specifically, based on the partition temperature, temperature rise rate, driving current, voltage fluctuation, cumulative lighting time, historical peak driving count, and thermal coupling relationship between adjacent partitions in the partitioned photothermal display status data, a lifespan-priority output upper limit model is established for each backlight partition. This model calculates the maximum brightness output that each backlight partition is allowed to continue to bear within the current control cycle, according to the LED light decay curve, junction temperature limit, cumulative high-brightness working time, and temperature aging weight. This maximum brightness output is then thermally checked against the partition's heat dissipation path, backplate thermal conductivity, local thermal resistance, thermal superposition between adjacent partitions, and a preset safe temperature threshold. After verification, it is found that when the lifespan-allowed output of a partition exceeds its thermal load upper limit, the thermal load upper limit is used as the constraint boundary; conversely, when a partition has sufficient thermal load capacity but significant lifespan depletion, the lifespan-constrained output is used as the constraint boundary. Based on this, different safety margins are configured for short-term peak brightness, continuous high brightness, and externally compensated brightness, so that the partition will not exceed the thermal safety boundary and lifespan safety boundary when it undertakes its own display brightness or provides diffusion compensation to other partitions. Finally, the partition safety output budget data is obtained, which includes the partition direct output limit, peak output limit, continuous output limit, compensable output margin, and safety reserve.

[0109] The system defines the safe range of brightness contribution for each backlight zone using zone safety output budget data. The display brightness requirements of each backlight zone are then converted into corresponding zone brightness quotas based on the target brightness of the image, ambient light compensation, liquid crystal transmittance, and HDR peak requirements. The diffusion compensation capability of each backlight zone is then incorporated into the quota allocation process. Based on the diffusion core, crosstalk coefficient, film system directional gain, distance attenuation coefficient, and effective incident brightness of the target area between zones, the compensation capacity that a given backlight zone can provide to surrounding zones after meeting its own brightness requirements is calculated. When the display brightness requirement of a zone exceeds its safe output budget, the excess is included in the external compensation quota and distributed according to the safe output margin, diffusion arrival efficiency, thermal coupling strength, and lifetime protection margin of neighboring zones. When a zone has a large safe output margin but low diffusion efficiency, its borrowed quota is reduced to avoid unnecessary brightness enhancement and additional power consumption. Finally, the self-brightness quota, borrowed compensation quota, compensated quota, thermal safety margin, and lifetime safety margin of each backlight zone are uniformly coupled to form a zone photothermal lifetime joint budget map.

[0110] In this embodiment, by first performing a reverse rating analysis on the lifespan consumption status and thermal carrying capacity, the safe output upper limit of each backlight zone can be determined before brightness allocation. This allows zones with higher aging levels, lower thermal margins, or a greater risk of continuous high brightness to be constrained in advance, avoiding passive derating during subsequent dimming stages that could cause a sudden drop in screen brightness. Then, based on the zone's safe output budget data, a collaborative quota analysis is performed on the display brightness requirements and diffusion compensation capabilities. This allows brightness tasks to be prioritized for zones that have both safe output margins and effective diffusion compensation capabilities, reducing ineffective brightening and overcompensation in inefficient zones. This ensures that the zone's photothermal lifespan joint budget map achieves a balance between brightness requirements, thermal safety boundaries, compensation capabilities, and lifespan margins during the generation stage, thereby improving the stability, continuity, and long-term consistency of backlight budget allocation.

[0111] In an exemplary embodiment, based on the partitioned photothermal display status data, a reverse rating analysis is performed on the lifespan consumption status and thermal load capacity of each backlight partition to obtain partitioned safe output budget data, including steps 802 to 806. Wherein:

[0112] Step 802: Based on the partitioned photothermal display status data, the lifespan of each backlight partition is calculated by back-calculating the lifespan margin to obtain the lifespan constraint output upper limit data.

[0113] Step 804: Based on the upper limit data of the lifespan constraint, perform thermal margin recharge on the thermal load capacity of each backlight zone to obtain the rated light and heat boundary data of the zone.

[0114] Step 806: Perform risk pre-occupancy and peak reduction processing on the partitioned photothermal rated boundary data to obtain partitioned safety output budget data.

[0115] Among them, the lifespan margin calculation refers to the calculation of the brightness output margin that each backlight zone can still safely bear within the current dimming cycle, based on the cumulative lighting time, historical peak drive, light decay compensation, and temperature aging of each backlight zone.

[0116] Among them, the lifetime constraint output upper limit data refers to the data formed by back-calculation of the lifetime margin, which is used to limit the upper limit of the continuous output brightness, short-term peak brightness and external compensation brightness of each backlight zone.

[0117] Among them, thermal margin reinjection refers to the process of further reducing the output boundary to a thermally safe range based on the upper limit of the output limit constrained by the lifespan, combined with the real-time temperature of the zone, the rate of temperature rise, the heat dissipation capacity, and the superposition of adjacent heat.

[0118] Among them, the rated boundary data of the photothermal zone refers to the output brightness boundary data of the zone formed after the heat margin is reinjected, which is simultaneously limited by the lifetime constraint and the heat load constraint.

[0119] Among them, risk pre-occupancy and peak shaving processing refers to the process of pre-occupying a portion of thermal risk, lifetime risk and instantaneous drive impact margin before generating the safe output budget, and reducing the output of high-risk peaks.

[0120] Specifically, based on the cumulative illumination time, historical peak current counts, continuous high brightness duration, LED light decay compensation coefficient, zone temperature history, and current drive duty cycle from the zoned photothermal display status data, a cumulative lifespan consumption model is first established for each backlight zone. Then, the LED rated lifespan curve, temperature accelerated aging coefficient, current stress coefficient, and light decay allowable threshold are introduced into this model to calculate the continuous output brightness, short-term peak output brightness, and externally compensated output brightness that each backlight zone can still withstand within the current control cycle. For zones that have been in a high-brightness operating state for a long time, have a large number of peak drive counts, or have already had a large light decay compensation amount, their lifespan allowable output upper limit is reduced, and aging margin required for subsequent brightness compensation is reserved for them. For zones with low cumulative workload and small light decay compensation amount, they are allowed to bear higher short-term compensation output, thus obtaining lifespan-constrained output upper limit data.

[0121] Using the lifetime constraint output upper limit data as the initial output boundary, and combining it with the real-time temperature, temperature rise rate, heat dissipation path thermal resistance, backplane thermal conductivity, thermal superposition of adjacent zones, and ambient temperature of each backlight zone, a reverse verification of the thermal load that each backlight zone can withstand is performed. The reverse verification result indicates that if a zone operates according to the lifetime constraint output upper limit, causing the temperature rise rate to exceed a preset threshold, the junction temperature to approach the safe upper limit, or a thermal superposition peak to form in adjacent zones, its output boundary is pushed back down to the thermal safety range; if a zone has sufficient heat dissipation margin and the thermal coupling between adjacent zones is weak, the usable portion of its lifetime constraint output upper limit is retained as subsequent compensation capacity. At the same time, different thermal margins are set for short-term peak output, continuous output, and cross-zone compensation output, so that the zone meets the thermal safety constraints when bearing its own brightness and when bearing the light borrowing compensation, and finally the photothermal rated boundary data of the zone is obtained.

[0122] Based on the rated light and heat boundary data for each backlight zone, thermal risk margin, lifetime risk margin, and instantaneous drive impact margin are reserved. This avoids peak suppression of zones about to enter high-brightness output after all safety boundaries are filled at once in the current frame. This is especially important for areas with continuous high brightness, densely packed adjacent high-brightness zones, strong thermal coupling, and areas with significant historical lifetime consumption. The peak current, peak duty cycle, or continuous peak duration are reduced, and the reduced brightness is left for redistribution in subsequent cross-zone compensation processes. For short-term HDR highlight areas, limited peak release is allowed within the reserved risk margin, but its repetition frequency and continuous duration are limited. Ultimately, this results in zone safety output budget data that simultaneously includes continuous safe output upper limit, short-term peak output upper limit, compensable output margin, reserved risk margin, and peak clipping limit parameters.

[0123] In this embodiment, by first performing a lifetime margin calculation, the output upper limit of each backlight zone can be constrained by cumulative aging, light decay compensation, and historical high brightness load, preventing aging zones from continuing to bear excessively high brightness tasks. Then, through thermal margin recirculation, the output upper limit at the lifetime level is further compressed into the range allowed by the current heat dissipation capacity, allowing zones with faster temperature rise, stronger thermal coupling, or insufficient heat dissipation margin to reduce their usable output boundary in advance. Finally, through risk pre-occupancy peak clipping, thermal shock, lifetime decay, and instantaneous drive fluctuation margins are reserved before forming a safe output budget, and continuous peak output is suppressed, thereby reducing local overheating, brightness drop, and drive overshoot during high brightness scene switching, so that subsequent brightness migration and zone dimming have a more stable safety margin.

[0124] In an exemplary embodiment, based on the zoned security output budget data, a collaborative quota analysis is performed on the display brightness requirements and diffusion compensation capabilities of each backlight zone to obtain a zoned photothermal lifetime joint budget map, including steps 902 to 908. Wherein:

[0125] Step 902: Based on the partitioned security output budget data, determine the security compensation capacity of the diffusion compensation capability of each backlight partition to obtain the partitioned compensation capacity data.

[0126] Step 904: Based on the compensable capacity data of each backlight zone, fill the demand gap for the display brightness requirements of each backlight zone to obtain candidate data for the brightness quota of each zone.

[0127] Step 906: Based on the candidate data of the zonal brightness quota, the diffusion compensation capability of each backlight zone is calibrated by the neighborhood substitution quota to obtain the zonal brightness compensation quota data.

[0128] Step 908: Perform budget overlay and interlocking processing on the partition brightness compensation quota data and the partition safety output budget data to obtain the partition photothermal lifetime joint budget map.

[0129] Among them, the safety compensation capacity delineation refers to the process of determining the brightness margin, compensation range, and safety boundary of each backlight zone that can be used for cross-zone diffusion compensation under the constraint of the zone safety output budget.

[0130] Among them, the compensable capacity data for each zone refers to the data formed after the safe compensation capacity is defined, which is used to record the upper limit of the brightness that can be borrowed by each backlight zone, the effective compensation range, the compensation direction, the attenuation parameters and the safe reserve amount.

[0131] Among them, demand gap filling refers to the process of allocating the brightness gap of a certain backlight zone to adjacent or related backlight zones with compensation capacity when the safe output of a certain backlight zone itself is insufficient to meet the display brightness requirements.

[0132] Among them, the candidate data for the brightness quota of each backlight zone refers to the data formed after the demand gap is filled, which is used to record the brightness quota of each backlight zone, the external filling quota, the candidate compensation source and the filling priority.

[0133] Among them, neighborhood substitution quota calibration refers to the process of correcting the substitution ratio of candidate compensation quotas based on the diffusion compensation efficiency, thermal coupling strength and lifetime margin of adjacent or associated backlight zones.

[0134] Among them, the partition brightness compensation quota data refers to the data formed after neighborhood substitution quota calibration, which is used to record the substitution compensation partition, compensation quota, compensation weight, compensation direction and brightness margin after calibration.

[0135] Among them, the budget layering and interlocking process refers to the process of superimposing and constraining the partition safety output budget, direct display brightness quota, borrowed compensation quota and compensated quota, so that the brightness allocation of each partition falls within the photothermal lifetime safety boundary.

[0136] Specifically, based on the continuous safe output limit, short-term peak output limit, compensable output margin, reserved thermal risk margin, and lifetime risk margin of each backlight zone in the zone safety output budget data, the brightness allowance that can be used for its own display and the brightness allowance that can be used for external compensation are first determined for each backlight zone. Then, combined with the diffusion distance, diffusion core radius, film system directional gain, edge attenuation coefficient, and liquid crystal transmittance between each backlight zone, the effective compensation brightness range that the zone can provide to surrounding zones without exceeding its own safe output budget is calculated. For backlight zones with high temperature rise rate, low lifetime margin, or strong thermal coupling with adjacent zones, their external compensation capacity is compressed and the thermal safety reserve is increased; for backlight zones with sufficient heat dissipation margin, low historical high brightness load, and high diffusion efficiency, they are allowed to retain a large external compensation capacity. Finally, the zone compensation capacity data, which includes the maximum brightness that each backlight zone can lend, the effective compensation range, the compensation direction, the compensation attenuation parameter, and the safety reserve, is obtained.

[0137] Using the upper limit of the borrowable brightness, effective compensation range, compensation direction, compensation attenuation parameters and safety reserve of each backlight zone in the partition compensation capacity data as the backfill boundary, and combined with the display brightness requirements, ambient light compensation amount, LCD panel transmittance and HDR peak brightness requirements of each backlight zone, the target brightness quota of each backlight zone in the current control cycle is calculated. However, when the self-safe output capacity of a certain backlight zone is insufficient to meet the target brightness capacity, the insufficient brightness is included in the backfilling object, and candidate backfilling quotas are allocated according to the corresponding compensable brightness margin, diffusion arrival efficiency, compensation direction matching degree, thermal safety reserve, and lifetime safety reserve of the surrounding backlight zones in the zone compensable capacity data. When multiple backlight zones have brightness gaps at the same time, the backfilling priority is configured according to the visual sensitivity of the display area, the size of the brightness gap, the compensation reachability, and the proportion of compensable capacity occupancy, so that the compensable capacity is given priority to be used for high brightness boundaries, text areas, HDR highlight areas, or areas with high readability requirements under strong ambient light. Finally, candidate data of zone brightness quotas including the direct brightness quota of this zone, the external backfilling brightness quota, candidate compensation sources, capacity occupancy ratio, and backfilling priority are obtained.

[0138] Based on the candidate compensation sources and amounts already formed in the candidate data of the zonal brightness quota, and combined with the diffusion compensation capability of each backlight zone, the actual effective brightness contribution between the candidate compensation zones and the compensated zones is calibrated. After calibration, for candidate compensation zones that are close to each other but have strong thermal coupling, their substitution quota is reduced to avoid local thermal superposition after compensation; for candidate compensation zones that are slightly farther away but have smooth diffusion paths, low halo risk, and large lifetime margin, their substitution quota is increased so that the brightness gap is shared by multiple safe zones. At the same time, according to the brightness gradient of adjacent zones, diffusion attenuation curve, uniformity requirements after compensation, and edge transition width, the candidate compensation amount is adjusted a second time so that the substitution quota can meet the brightness gap of the target area without forming bright spots, dark seams, or grayscale jumps around the compensated area. Finally, zonal brightness compensation quota data containing substitution compensation zones, substitution compensation amounts, compensation weights, compensation directions, and brightness margins after calibration is obtained.

[0139] The zonal brightness compensation quota data and zonal safe output budget data are layered and aligned according to the backlight zone position, compensation direction, and control cycle. This ensures that each backlight zone is simultaneously constrained by its own display brightness quota, borrowed compensation quota, received compensation quota, thermal safety reserve, and lifetime safety reserve. When the sum of a backlight zone's own display brightness quota and borrowed compensation quota approaches or exceeds the safe output budget, priority is given to reserving the basic brightness quota required for its own display, while the borrowed compensation quota is compressed or transferred. When a compensated zone is jointly compensated by multiple neighboring zones, the compensation quota is distributed in a staggered manner according to the remaining safe budget, diffusion efficiency, and compensation stability of each compensated zone to avoid a single zone bearing an excessive compensation load. Then, conflicting brightness quotas, thermal budgets, and lifetime budgets are closed out, ensuring that the direct output, borrowed output, and compensated input of each zone all fall within the safe boundaries, ultimately yielding a zonal photothermal lifetime joint budget map.

[0140] In this embodiment, by first defining the safety compensation capacity, the diffusion compensation capability can be constrained by the zone's safety output budget, preventing zones with supplemental lighting capabilities from forming new heat load concentrations due to excessive borrowing of brightness. Then, by filling the demand gap, the portion of the display brightness demand that cannot be safely borne by this zone is transformed into candidate quotas that can be compensated by neighboring zones, so that the brightness gap is allocated across zones during the budgeting stage. Subsequently, through neighboring substitution quota calibration, the substitution ratio of each candidate zone can be adjusted according to the actual diffusion compensation capability, reducing inefficient compensation and ineffective brightening. Finally, through budget layering and interlocking processing, the direct display brightness, borrowed compensation brightness, compensated brightness, and safety output budget are unified and closed, thereby reducing budget conflicts, compensation overlap, and brightness quota imbalance.

[0141] In an exemplary embodiment, dynamic driving calculations are performed on the driving parameters of each backlight zone based on cross-zone brightness migration path data to obtain zone backlight dynamic driving data, including steps 1002 to 1006. Wherein:

[0142] Step 1002: Based on the cross-zone brightness migration path data, perform path responsibility back-annotation on the brightness assignment parameters of each backlight zone to obtain the zone brightness assignment weight data.

[0143] Step 1004: Based on the zonal brightness weighting data, perform peak phase misalignment pulse compression processing on the peak driving component, point position, and pulse width of each backlight zone to obtain zonal driving timing skeleton data.

[0144] Step 1006: Based on the partition drive timing skeleton data, the drive current, PWM duty cycle and peak limiting parameters of each backlight partition are subjected to limiting and condensation processing to obtain partition backlight dynamic drive data.

[0145] Among them, the brightness assignment parameter refers to the set of parameters used to determine the proportion of display brightness, cross-zone compensation brightness, and compensated brightness that each backlight zone is responsible for in the current dimming cycle.

[0146] Among them, path responsibility reverse labeling refers to the process of reversing the compensation tasks in each brightness migration path to the corresponding backlight partition based on the cross-partition brightness migration path, so as to determine the brightness responsibility of each partition.

[0147] Among them, the partition brightness weight data refers to the data formed after path responsibility back-annotation, which is used to record the brightness weight of each backlight partition, the weight of borrowed compensation, the weight of compensation dependency, and the path priority.

[0148] Peak drive component: refers to the high current, high duty cycle, or high brightness output portion that each backlight zone needs to apply to meet the target brightness or compensate for brightness.

[0149] Among them, the lighting position refers to the time position at which each backlight zone starts to light up and continues to output within a backlight refresh cycle or PWM control cycle.

[0150] Among them, peak phase misalignment and pulse compression processing refers to the process of misaligning, misaligning and compressing the peak driving components, point positions and pulse widths of each backlight zone in order to reduce synchronous high power output and local thermal superposition.

[0151] Among them, the partition-driven timing skeleton data refers to the data formed after peak phase misalignment pulse processing, which is used to record the appearance position, pulse width, peak misalignment window, segmented output order and peak avoidance relationship of each backlight partition point.

[0152] Among them, the peak limiting parameter refers to the control parameters used to limit the peak current of each backlight zone, the maximum PWM duty cycle, the duration of continuous high brightness, and the frequency of repeated peak triggering.

[0153] Among them, the limiting and condensing process refers to the process of unifying and synthesizing the drive current, PWM duty cycle, peak limiting parameters and compensation weight into executable partitioned backlight dynamic drive data based on the partitioned drive timing skeleton.

[0154] Specifically, based on the determined light-borrowing starting zone, light-receiving target zone, migrated brightness amount, compensation weight, path direction, and path priority in the cross-zone brightness migration path data, each brightness migration path is mapped to the backlight zone participating in compensation and the backlight zone being compensated. Then, according to the target brightness gap of the thermally insufficient zone, the compensable compensation brightness of the thermally abundant zone, path propagation attenuation, corridor compensation efficiency, and path priority, the self-display brightness, borrowed compensation brightness, and compensated brightness that each backlight zone should bear in the current control cycle are calculated. For cases where the same thermally insufficient zone is jointly compensated by multiple thermally abundant zones, the brightness responsibility is allocated according to the diffusion efficiency, remaining thermal budget, lifetime margin, and halo safety margin of each compensation path to avoid a single abundant zone bearing excessive output. For cases where the same abundant zone participates in multiple migration paths simultaneously, the responsibility ratio is configured according to the visual sensitivity of the compensated area, the urgency of the brightness gap, and the path priority, ultimately obtaining the zone brightness bearing weight data.

[0155] Based on the brightness weighting data of each backlight zone, the peak drive component required for each zone within one or more refresh cycles is calculated. High-peak-output zones are then divided into different phase groups according to the thermal coupling strength between adjacent zones, instantaneous power supply output capability, backlight scanning timing, and LCD response window. Next, the point-to-point positioning of adjacent or thermally coupled high-brightness zones is staggered to prevent their peak drives from concentrating within the same time window. Simultaneously, zones with lower brightness weighting or lower compensation priority are arranged to output within non-peak windows. Furthermore, for zones with a surplus thermal budget requiring cross-zone compensation, while ensuring sufficient diffuse brightness in the target area, their single pulse width is compressed and the number of distributed outputs is increased, allowing the compensation light to enter the corridor in multiple low-amplitude pulses. For zones with insufficient thermal budget, their peak drive component is reduced and the high duty cycle duration is shortened, allowing their direct heat load to be released in a staggered manner, ultimately forming the zone drive timing skeleton data.

[0156] Using the phase sequence, peak misalignment window, and compressed pulse width determined in the partition drive timing skeleton data as the timing framework, the brightness weight of each backlight partition is converted into corresponding drive current, PWM duty cycle, and peak limiting parameters. Based on the safe output budget, thermal margin, lifetime margin, driver IC current limit, and power supply instantaneous power limit of each partition, the peak drive current, maximum PWM duty cycle, continuous high brightness duration, and repetitive peak trigger frequency are uniformly limited. For partitions with a surplus thermal budget undertaking external compensation tasks, additional output is configured according to the compensation path weight and corridor brightness transition requirements, but this additional output is still limited by the thermal safety margin and lifetime margin. For partitions with insufficient thermal budget, the reduced direct drive output is combined with the compensation output in the corresponding migration path, so that the target brightness is achieved by the direct output of this partition and the diffusion compensation of other partitions. Finally, the drive current value, PWM duty cycle, phase offset, pulse width, peak limiting value, and compensation weight of each partition are uniformly generated to generate partition backlight dynamic drive data that can be executed by the partition drive circuit.

[0157] In this embodiment, by using path responsibility back-annotation, the compensation task in the cross-zone brightness migration path can be converted into the brightness bearing weight of each backlight zone, so that the direct display output, borrowed compensation output, and compensation dependency of each zone are quantitatively allocated before the driver is generated. Then, by using peak phase misalignment pulse processing, the peak driving component, point position, and pulse width of the high-brightness zone are configured to be staggered, reducing the power surge, instantaneous thermal superposition, and brightness flicker caused by multiple adjacent zones entering high power output at the same time. Finally, by using amplitude limiting and condensation processing, the timing skeleton, driving current, PWM duty cycle, and peak amplitude limiting parameters are unified and converged into executable zone backlight dynamic driving data, so that the brightness output after cross-zone compensation is smoother, driving overshoot and peak power consumption fluctuations are reduced, and the response stability of backlight control in continuous high-brightness scenes and rapid brightness switching scenarios is improved.

[0158] In an exemplary embodiment, based on the zonal brightness weighting data, peak phase misalignment pulse compression processing is performed on the peak driving component, point position, and pulse width of each backlight zone to obtain zonal driving timing skeleton data, including steps 1102 to 1106. Wherein:

[0159] Step 1102: Based on the partition brightness weight data, perform peak group decomposition on the peak driving component of each backlight partition to obtain partition peak load segment data.

[0160] Step 1104: Based on the peak load segment data of each backlight zone, perform windowed staggered layering of the point display positions of each backlight zone to obtain the staggered phase sequence data of the zones.

[0161] Step 1106: Based on the misaligned phase sequence data of the partitions, the pulse width of each backlight partition is backfilled by pulse compression to obtain the partition driving timing skeleton data.

[0162] Peak group splitting refers to dividing the high peak driving loads that may occur in each backlight zone within the same control cycle into multiple peak levels that can be staggered and scheduled, according to the source of brightness responsibility, peak amplitude, duration and adjacent thermal coupling relationship.

[0163] Among them, the peak load segment data of the partition refers to the data formed after peak group decomposition, which is used to record the amplitude, duration, level, priority and adjacent peak avoidance relationship of each backlight partition peak drive segment.

[0164] Among them, the staggered embedding of empty windows refers to the timing arrangement process of embedding the peak load segments of the partition into different time windows according to the point appearance position, power low load window, liquid crystal response window and adjacent partition avoidance requirements.

[0165] Among them, the partitioned misaligned phase sequence data refers to the data formed after interleaving with empty windows, which is used to record the appearance position, phase level, empty window position, avoidance interval and peak segment arrangement order of each backlight partition point.

[0166] Among them, pulse backfilling refers to compressing the single pulse width of the high peak value zone while backfilling the compressed luminance integral into other safe time windows in the form of low amplitude, multi-segment, and phase-shifted pulses, so as to reduce instantaneous power consumption and thermal shock.

[0167] Specifically, based on the brightness load weights of each backlight zone in the partition brightness load weight data, including its own brightness load weight, external compensation load weight, path responsibility priority, and compensation dependency weight, the brightness load that each backlight zone needs to complete in the current backlight refresh cycle is converted into corresponding peak drive components. These peak drive components are then divided into local display peak components, cross-partition compensation peak components, and short-term enhancement peak components according to their brightness source. Then, based on the amplitude, allowable duration, delay capability, instantaneous power load margin, and thermal coupling strength between adjacent partitions for each type of peak drive component, continuous peak drive components are divided into several peak load segments with independent amplitudes, durations, and execution priorities. This breaks down the high peak loads that were originally concentrated in the same control window into segment units that can be scheduled during off-peak periods. For adjacent or thermally coupled backlight zones, their peak load segments are allocated to different peak group levels so that multiple neighboring zones do not enter the high current state simultaneously in the same driving phase. For peak load segments with high path responsibility priority and directly affecting the brightness compensation of zones with insufficient thermal budget, a higher execution priority and a more complete peak amplitude are retained. For compensation loads that can be delayed or have low visual sensitivity, their peak load segments are further divided into multiple low-amplitude, short-duration, and dispersed segments to finally obtain the zone peak load segment data.

[0168] Based on the amplitude, duration, segment level, segment priority, and adjacent peak avoidance relationships of each peak segment in the partitioned peak load segment data, a sequence of schedulable phase windows is first established within one or more backlight refresh cycles. Then, according to the liquid crystal response time, instantaneous power supply margin, partitioned thermal coupling strength, and compensation path delay, the phase windows are divided into a basic display window, a compensation output window, a low-load empty window, and a phase buffer window. Next, high-priority peak segments with shorter durations are preferentially embedded into the low-load empty window, while peak segments with longer durations or higher thermal coupling risks are dispersed and embedded into different phase layers. This ensures that a preset phase interval is maintained between adjacent high-brightness partitions, continuous compensation partitions on the same path, and backlight partitions sharing the same power supply branch. For the case where multiple thermal budget surplus zones jointly compensate for the same thermal budget deficit zone, the compensation peak segments of each thermal budget surplus zone are distributed in different misaligned phases according to the progressive relationship of diffusion arrival time and compensation intensity, so that the target area can obtain continuous compensation without single-window superposition. For phase windows where the power load is close to the upper limit or the temperature rise of adjacent zones increases synchronously, the instantaneous load pressure is released by shifting the peak segments forward, backward, splitting, or embedding them in a lower layer, and finally forming the partition misaligned phase sequence data.

[0169] Using the determined point position, phase level, window embedding position, peak segment arrangement order, and adjacent partition avoidance interval in the partitioned misaligned phase sequence data as the timing framework, the single pulse width of each peak segment is compressed according to the target brightness integral, drive current upper limit, allowable temperature rise rate, PWM minimum resolution, and liquid crystal response time of each backlight partition, so that the wide pulse originally concentrated in a single phase window is split into multiple short pulses or low amplitude pulses. For backlight zones with high peak drive components and large thermal loads, the main pulse width is compressed first, and the lost luminance integral after compression is backfilled into subsequent low-load phase windows, adjacent empty windows, or compensation output windows according to the time misalignment principle. This ensures that the zone still reaches the target luminance integral throughout the entire refresh cycle without instantaneous overheating. For zones with surplus thermal budget that undertake cross-zone light borrowing compensation, the compensation pulse is set as a multi-segment progressive backfill pulse according to the propagation delay, diffusion attenuation, and luminance gap of the compensated area in the compensation path. This allows diffused light to enter the light borrowing corridor in a small, multiple, and continuous manner, avoiding sudden brightness jumps in the target area caused by single-segment wide pulses. For zones with insufficient thermal budget, the duration of their high duty cycle pulses is further shortened, and the corresponding luminance gap is allocated to the backfill pulses of surplus zones in the migration path, reducing their own heat generation while maintaining continuous display brightness. At the same time, a minimum time misalignment interval is set for the pulse rising and falling edges of adjacent zones, and the number of pulses in the same time window is constrained according to the instantaneous power supply limit to prevent multiple zones from flipping synchronously, causing power ripple, flicker, and thermal superposition. Finally, the zone drive timing skeleton data is generated.

[0170] In this embodiment, by peak group delamination, the originally concentrated and superimposed high peak driving components can be split into multiple schedulable peak load segments, so that the display load, the borrowed compensation load, and the short-term enhancement load are separated at the timing level. Then, by using window staggered layering, the point positions of different backlight zones are embedded in low-load windows or staggered phases, so that the high brightness output avoids the synchronous lighting period of adjacent zones. Subsequently, by pulse compression backfilling, while compressing the width of a single pulse, multiple low-amplitude backfill pulses are used to supplement the brightness integral, thereby reducing the instantaneous brightness jump, scanning stripes, and zone flicker caused by wide pulses, and improving the fineness of backlight timing output, liquid crystal response matching degree, and visual smoothness under continuous images.

[0171] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0172] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 3 As shown. This computer device includes a processor, memory, input / output interfaces (I / O), and communication interfaces.

[0173] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0174] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0175] In one embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0176] In one embodiment, a computer program product or computer program is provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and executes the computer instructions, causing the computer device to perform the steps in the above method embodiments.

[0177] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0178] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods.

[0179] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0180] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for dynamic dimming of local dimming backlight in a high-brightness direct-lit liquid crystal display screen, characterized in that, The method includes: The display source data, partition operation data, and optical calibration data of the LCD screen are fused and mapped to obtain partition photothermal display status data. Based on the partitioned photothermal display status data, a joint budget analysis is performed on the display brightness requirements, heat carrying capacity, diffusion compensation capacity, and lifespan consumption status of each backlight partition of the liquid crystal display screen to obtain a partitioned photothermal lifespan joint budget map. Based on the joint budget map of photothermal lifetime of the partition, the thermal margin difference and brightness load difference between the backlight partitions are identified by the migration load, and the thermal budget insufficient partition, thermal budget surplus partition and the transferable brightness load data of the partition are obtained. Based on the transferable brightness load data of the partitions, a cold zone light-borrowing traction analysis is performed on the diffuse light compensation relationship, halo back projection constraint relationship and display uniformity constraint relationship between the thermal budget insufficient partition and the thermal budget surplus partition to obtain cross-partition brightness migration path data. Based on the cross-zone brightness migration path data, the driving parameters of each backlight zone are dynamically calculated to obtain the zone backlight dynamic driving data.

2. The method according to claim 1, characterized in that, The method involves performing a cold-zone light-borrowing traction analysis on the diffuse light compensation relationship, halo projection constraint relationship, and display uniformity constraint relationship between the thermally budget-insufficient zone and the thermally budget-excessive zone, based on the transferable brightness load data of the zones, to obtain cross-zone brightness migration path data, including: Based on the partitioned transferable luminance load data, the halo back projection constraint relationship is subjected to halo domain inversion casting boundary processing to obtain the borrowed light forbidden shadow domain data. Based on the data of the forbidden light field, the display uniformity constraint relationship is subjected to uniform corridor weaving processing to obtain the data of the uniform light field corridor. Based on the light-equalizing corridor data, the diffused light compensation relationship is processed by cold source compensation path locking to obtain the cross-zone brightness migration path data.

3. The method according to claim 2, characterized in that, The step of performing halo domain inversion casting boundary processing on the halo back-projection constraint relationship based on the partitioned transferable luminance load data to obtain the borrowed light forbidden shadow domain data includes: The halo source is reversed in the luminance load data to be migrated in the migrateable luminance load data of the partition to obtain the halo source data to be reversed; Based on the halo source data to be reverse-projected, the halo reverse-projection constraint relationship is inversely expanded to obtain the reverse-projection halo boundary data. The back-projected halo boundary data is subjected to forbidden boundary processing to obtain the borrowed light forbidden shadow domain data.

4. The method according to claim 2, characterized in that, The step of performing uniform corridor weaving processing on the display uniformity constraint relationship based on the borrowed light forbidden shadow domain data to obtain borrowed light uniform corridor data includes: Based on the borrowed light forbidden shadow domain data, the forbidden domain stripping is performed on the display uniformity constraint relationship to obtain the weavable uniform field bottom domain data; The brightness uniformity fracture region in the weavable uniform field bottom domain data is subjected to uniform difference folding processing to obtain uniform stitch node data; Based on the uniform stitching node data, the weavable uniform field bottom domain data is arranged in the corridor direction to obtain candidate light-borrowing corridor data; The candidate light-borrowing corridor data are subjected to corridor steady-state locking to obtain the light-borrowing balanced corridor data.

5. The method according to claim 2, characterized in that, The step of performing cold source compensation path locking processing on the diffused light compensation relationship based on the light-borrowing equalization corridor data to obtain the cross-zone brightness migration path data includes: Based on the light-equalization corridor data, the compensation window of the diffused light compensation relationship is calculated in reverse to obtain the cold source compensation window data; Based on the cold source compensation window data, the compensation path is locked for the diffuse light compensation relationship to obtain the cross-zone brightness migration path data.

6. The method according to claim 1, characterized in that, The step involves performing a joint budget analysis on the display brightness requirements, heat load capacity, diffusion compensation capacity, and lifespan consumption status of each backlight zone of the liquid crystal display screen based on the partitioned photothermal display status data, to obtain a partitioned photothermal lifespan joint budget map, including: Based on the photothermal display status data of the partitions, a reverse rating analysis is performed on the lifespan consumption status and thermal load capacity of each backlight partition to obtain partition safety output budget data. Based on the partitioned security output budget data, a collaborative quota analysis is performed on the display brightness requirements and diffusion compensation capabilities of each backlight partition to obtain a joint budget map of the partitioned photothermal lifetime.

7. The method according to claim 6, characterized in that, The step involves performing a reverse rating analysis on the lifespan consumption status and thermal load capacity of each backlight zone based on the zoned photothermal display status data, to obtain zoned safe output budget data, including: Based on the partitioned photothermal display status data, the lifespan of each backlight partition is back-calculated to obtain the lifespan constraint output upper limit data. Based on the lifetime constraint output upper limit data, the thermal margin of the thermal carrying capacity of each backlight zone is backfilled to obtain the zone photothermal rated boundary data. Risk pre-occupancy and peak reduction processing is performed on the rated photothermal boundary data of the partition to obtain the safe output budget data of the partition.

8. The method according to claim 6, characterized in that, The step involves performing a coordinated quota analysis on the display brightness requirements and diffusion compensation capabilities of each backlight zone based on the zoned security output budget data, to obtain a joint budget map of the zoned photothermal lifetime, including: Based on the partition security output budget data, the security compensation capacity of the diffusion compensation capability of each backlight partition is determined to obtain the partition compensation capacity data. Based on the compensable capacity data of the partition, the display brightness requirements of each backlight partition are filled in the demand gap to obtain candidate data for partition brightness quota. Based on the candidate data of the partition brightness quota, the diffusion compensation capability of each backlight partition is calibrated by neighborhood substitution quota to obtain the partition brightness compensation quota data. Budget overlay and interlocking processing is performed on the partition brightness compensation quota data and the partition safety output budget data to obtain the partition photothermal lifetime joint budget map.

9. The method according to claim 1, characterized in that, The step of performing dynamic driving calculations on the driving parameters of each backlight zone based on the cross-zone brightness migration path data to obtain zone backlight dynamic driving data includes: Based on the cross-zone brightness migration path data, the brightness assignment parameters of each backlight zone are back-labeled with path responsibility to obtain the zone brightness assignment weight data. Based on the partition brightness weighting data, peak phase misalignment pulse compression processing is performed on the peak driving component, point position and pulse width of each backlight partition to obtain partition driving timing skeleton data. Based on the partition drive timing skeleton data, the drive current, PWM duty cycle and peak limiting parameters of each backlight partition are subjected to limiting and condensation processing to obtain the partition backlight dynamic drive data.

10. The method according to claim 9, characterized in that, The step involves performing peak-phase misalignment pulse compression processing on the peak driving component, point position, and pulse width of each backlight zone based on the zone brightness weighting data to obtain zone driving timing skeleton data, including: Based on the partition brightness weight data, the peak driving components of each backlight partition are decomposed into peak groups to obtain partition peak load segment data. Based on the peak load segment data of the partition, the point position of each backlight partition is staggered and interlocked to obtain partition staggered phase sequence data. Based on the partition misalignment phase sequence data, the pulse width of each backlight partition is compressed and backfilled to obtain the partition driving timing skeleton data.

Images