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WO2022089191A1 - 背光控制方法、装置、电子设备和计算机可读存储介质 - Google Patents

背光控制方法、装置、电子设备和计算机可读存储介质 Download PDF

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Publication number
WO2022089191A1
WO2022089191A1 PCT/CN2021/123190 CN2021123190W WO2022089191A1 WO 2022089191 A1 WO2022089191 A1 WO 2022089191A1 CN 2021123190 W CN2021123190 W CN 2021123190W WO 2022089191 A1 WO2022089191 A1 WO 2022089191A1
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WO
WIPO (PCT)
Prior art keywords
backlight
current
duty cycle
maximum
partition
Prior art date
Application number
PCT/CN2021/123190
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English (en)
French (fr)
Inventor
武勇
钱立红
Original Assignee
Oppo广东移动通信有限公司
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2022089191A1 publication Critical patent/WO2022089191A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • the present application relates to the field of display screen display technology, and in particular, to a backlight control method, apparatus, electronic device and computer-readable storage medium.
  • backlight modulation technology is usually used to control the brightness of the backlight, and the luminous effect of the backlight will directly affect the visual effect of the display.
  • the temperature of the light source When it is lit for a long time, the temperature of the light source will rise linearly, causing the temperature of the display device to rise and affecting the life of the lamp.
  • a backlight control method, apparatus, electronic device, and computer-readable storage medium are provided.
  • a backlight control method executed by an electronic device, the method comprising:
  • the maximum backlight duty cycle of each backlight partition of the display screen is restored to the configuration value corresponding to the current display state of the display screen.
  • a backlight control device comprising:
  • an obtaining module configured to obtain a first duration of time when the duty cycle of the backlight corresponding to the current backlight partition is greater than the preset maximum threshold, and the current backlight partition is the backlight partition in the display screen;
  • a reducing module configured to reduce the maximum backlight duty cycle of the current backlight partition according to the preset maximum threshold when the first duration is greater than a first time threshold
  • the restoration module is used to restore the maximum backlight duty cycle of each backlight partition of the display screen to a configuration value corresponding to the current display state of the display screen when the scene switching of the display screen is detected.
  • a computer device comprising a memory and one or more processors, the memory storing computer-readable instructions that, when executed by the one or more processors, cause the one or more processors
  • the processor executes the steps of the above-mentioned backlight control method.
  • One or more non-volatile computer-readable storage media having computer-readable instructions stored thereon that, when executed by one or more processors, cause the one or multiple processors to perform the steps of the above-mentioned backlight control method.
  • 1 is an application environment diagram of a backlight control method in one or more embodiments
  • FIG. 2 is a flowchart of a backlight control method in one or more embodiments
  • FIG. 3 is a flowchart of a backlight control method in another or more embodiments.
  • FIG. 4 is a schematic flowchart of backlight control through first-layer logic in one or more specific embodiments
  • FIG. 5 is a schematic flowchart of backlight control through second-layer logic in one or more specific embodiments
  • FIG. 6 is a schematic diagram of a maximum duty value allocation table corresponding to a current backlight partition when different display windows are accounted for in one or more embodiments;
  • FIG. 7 is a structural block diagram of a backlight control apparatus in one or more embodiments.
  • FIG. 8 is a schematic diagram of an internal structure of an electronic device in one or more embodiments.
  • first, second, etc. used in this application may be used herein to describe various data, but these data are not limited by these terms. These terms are only used to distinguish the first data from another.
  • a first duration may be referred to as a second duration, and similarly, a second duration may be referred to as a first duration, without departing from the scope of this application.
  • Both the first duration and the second duration are durations, but they are not the same duration.
  • FIG. 1 is a schematic diagram of an application environment of a backlight control method in one embodiment.
  • the application environment includes a display screen 102, wherein the display screen 102 includes a plurality of backlight partitions, and each backlight partition includes at least one backlight source.
  • the backlight brightness of the partition can be adjusted.
  • the display screen 102 can be, but is not limited to, a display screen of various televisions, personal computers, notebook computers, smart phones, tablet computers and portable wearable devices.
  • each backlight partition has a corresponding backlight duty cycle, and obtain the first duration for which the backlight duty cycle corresponding to the current backlight partition is greater than the preset maximum threshold.
  • the maximum backlight duty cycle of the current backlight partition is reduced according to the preset maximum threshold value.
  • the maximum backlight duty cycle of each backlight partition of the display screen is restored to the current display state of the display screen. the corresponding configuration value.
  • FIG. 2 is a flowchart of a backlight control method in one embodiment.
  • the backlight control method in this embodiment is described by taking the operation on the display screen 102 in FIG. 1 as an example. Method the following steps:
  • Step 202 Acquire a first duration of time when the duty cycle of the backlight corresponding to the current backlight partition is greater than a preset maximum threshold.
  • the current backlight partition is any one of the backlight partitions in the display.
  • the duty cycle of the backlight refers to the ratio of the power-on time to the total time in a pulse cycle. For example, a pulse sequence with a pulse width of 1 ⁇ s and a signal period of 4 ⁇ s has a duty cycle The ratio is 0.25.
  • the display screen includes 210 backlight sub-regions, and each backlight sub-region includes 2 light tubes.
  • the backlight duty cycle is adjusted in units of backlight partitions, and the preset maximum threshold may be different according to the properties of the lamp. In one embodiment, if a single lamp exceeds 60% of the duty, it will burn for more than 5 minutes. risk of bad lamps, so the preset max threshold can be set to 60%. The first duration can be obtained by counting the counters. Different backlight partitions correspond to different backlight duty ratios. In one embodiment, different maximum backlight duty cycles are allocated to the backlight partitions according to the display window ratio of the display screen.
  • the backlight partition keeps the first preset maximum backlight duty cycle unchanged, and when the window ratio is less than the second preset window threshold, the backlight partition maintains the second preset maximum backlight duty cycle unchanged, wherein the first A preset window threshold is greater than the second preset window threshold, and the first preset maximum backlight duty ratio is smaller than the second preset maximum backlight duty cycle.
  • the maximum backlight duty ratio corresponding to the backlight partition is decreased as the window ratio increases.
  • the first preset window threshold is 70%
  • the second preset window threshold is 15%
  • the first preset maximum backlight duty cycle is 40%
  • the second preset maximum backlight duty cycle is 100%. That is, when the window ratio is less than 15%, the maximum backlight duty cycle corresponding to the backlight partition is 100%.
  • the window ratio is greater than or equal to 15% and less than or equal to 70%
  • the corresponding backlight partition The maximum backlight duty cycle is continuously reduced until the window ratio is greater than 70%, and the maximum backlight duty cycle corresponding to the backlight partition remains unchanged at 40%.
  • Step 204 when the first duration is greater than the first time threshold, reduce the maximum backlight duty cycle of the current backlight partition according to the preset maximum threshold.
  • the first time threshold can be customized.
  • the first time threshold is an empirical value obtained according to the statistics of the video content and the characteristics of the human eye.
  • the first duration is 40s. Normally, a picture is maintained at the current The state generally does not exceed 40 seconds. For example, a sun is currently playing, and the brightness corresponding to the sun is the maximum value. If the lamp tube of the backlight zone corresponding to the sun position exceeds 40 seconds, the lamp tube of the backlight zone corresponding to the sun position will start to become hot, and the maximum value of the backlight zone of this position needs to be The backlight duty cycle is reduced, which reduces brightness and reduces lamp temperature.
  • the maximum backlight duty cycle of the current backlight partition can be gradually reduced to be equal to or less than the preset maximum threshold.
  • the gradually decreasing algorithm can be customized. For example, you can customize the acceleration to gradually reduce the maximum backlight duty cycle of the current backlight partition, or you can gradually reduce the maximum backlight duty cycle of the current backlight partition at a constant speed.
  • the reduction speed can be determined by reducing the preset magnitude by the preset number of frames.
  • Step 206 when detecting the scene switching of the display screen, restore the maximum backlight duty cycle of each backlight partition of the display screen to a configuration value corresponding to the current display state of the display screen.
  • scene switching means that the display content of the display screen changes in the scene.
  • the scene switching can be detected by the extent of the change in the display content exceeding a preset threshold, and the scene switching can be detected by detecting the occupancy of the lamp that has changed beyond the preset gray level. More recently, it is determined whether a scene switch has occurred.
  • the current display state of the display screen can be determined according to the configuration strategy of the maximum backlight duty cycle. If the configuration strategy is to determine the maximum backlight duty cycle of each backlight partition according to the window size, the current display state of the display screen is determined according to the current display screen of the display screen.
  • the proportion of the display window for example, the proportion of the display window corresponding to the current display picture is the moon is 20%, and the proportion of the display window corresponding to the current display picture is the star is 10%.
  • the current display state of the display screen can be other display parameters, such as the size of the area of interest. Restore the maximum backlight duty cycle of each backlight partition of the display screen to the configuration value corresponding to the current display state of the display screen, so that when scene switching occurs, the display of the screen is not affected by the previous adjustment of the maximum backlight duty cycle of the current backlight partition. , to ensure the display quality of the picture when scene switching occurs.
  • the backlight control method in this embodiment obtain the first duration time when the duty cycle of the backlight corresponding to the current backlight partition is greater than the preset maximum threshold; when the first duration is greater than the first time threshold, decrease according to the preset maximum threshold The maximum backlight duty cycle of the current backlight partition; when the screen scene switching is detected, the maximum backlight duty cycle of each backlight partition of the display screen is restored to the configuration value corresponding to the current display state of the display screen. In this way, when the backlight duty cycle is continuously greater than the preset maximum threshold, the maximum backlight duty cycle of the current backlight partition can be automatically reduced, thereby reducing the brightness, reducing the temperature of the lamp tube, and prolonging the life of the lamp tube.
  • the display of the picture is not affected by the previous adjustment of the maximum backlight duty cycle of the current backlight partition, which ensures the display quality of the picture when the scene is switched. There is no need to add additional heat dissipation devices, and the balance between display quality and heat dissipation is achieved. Cost control Guaranteed display quality.
  • step 202 includes: counting the first duration by using a first timer corresponding to the current backlight partition.
  • the backlight control method further includes: when the maximum backlight duty ratio of the current backlight partition is reduced according to the preset maximum threshold, clearing the first timer, and when the display screen scene is switched, clearing the first timer.
  • each backlight partition has a corresponding first timer for counting the first duration, and when the first duration is greater than the first time threshold, the maximum backlight occupation of the current backlight partition is reduced according to the preset maximum threshold duty cycle, while clearing the first timer.
  • the timing trigger function of the first timer is restarted, so that the next time the current backlight partition corresponds to the backlight duty cycle When it is greater than the preset maximum threshold, the timing function of the first timer can be triggered.
  • the timing trigger function of the first timer is turned off.
  • the backlight duty cycle corresponding to the current backlight partition is greater than the preset maximum threshold
  • the The adjustment has already started, and there is no need to activate the timing function of the first timer.
  • the maximum backlight duty cycle of each backlight partition of the display screen is restored to the configuration value corresponding to the current display state of the display screen, and the first timer is cleared at this time, and the backlight corresponding to the next current backlight partition
  • the first timer starts to count again.
  • the first timer when starting to adjust the maximum backlight duty cycle of the current backlight partition or switch the display screen scene, the first timer is cleared to make it easier for the first timer to work normally and keep the timing accurate. Clear to zero and count time intelligently.
  • the backlight control method further includes:
  • Step 302 using a second timer corresponding to the current backlight partition to count the second duration time for which the duty cycle of the backlight corresponding to the current backlight partition is greater than a preset maximum threshold.
  • each backlight partition has a corresponding second timer, and the timing rule of the second timer is different from that of the first timer.
  • the second timer will not be cleared.
  • Step 304 when the second duration is greater than the second time threshold, reduce the maximum backlight duty cycle of the current backlight partition according to the preset maximum threshold, and clear the second timer, and the second time threshold is greater than the first time threshold.
  • the second time threshold can be customized, and the second time threshold is greater than the first time threshold.
  • the second time threshold is a critical value at which the lamp is at risk of burnout. For example, if a single lamp exceeds 60% of the duty and the time exceeds 5 minutes, the lamp may be at risk of burnout, the second time can be The threshold was set to 5 minutes.
  • the maximum backlight duty cycle of the current backlight partition is decreased according to the preset maximum threshold, and the maximum backlight duty cycle of the current backlight partition can be gradually reduced to be equal to or less than the preset maximum backlight duty cycle.
  • the gradually decreasing algorithm can be customized. For example, you can customize the acceleration to gradually reduce the maximum backlight duty cycle of the current backlight partition, or you can gradually reduce the maximum backlight duty cycle of the current backlight partition at a constant speed. The reduction speed can be determined by reducing the preset magnitude by the preset number of frames. At the same time, the second timer is cleared.
  • the timing time of the second timer reaches the second time threshold, such as 5 minutes, the duty should be lowered to reduce the current The maximum backlight duty cycle for the backlight partition.
  • the first timer is cleared and the duration of the backlight duty cycle greater than the preset maximum threshold cannot be counted.
  • the second timer performs statistics, so that when the second time threshold is reached, the maximum backlight duty cycle of the current backlight partition is automatically reduced, so as to protect the lamp tube and prolong the life of the lamp tube.
  • reducing the maximum backlight duty cycle of the current backlight partition according to the preset maximum threshold includes: for the current backlight partition, gradually reducing the corresponding maximum backlight duty cycle according to the display image frame period until the maximum backlight duty cycle of the current backlight partition is reached.
  • the backlight duty cycle is equal to or less than the preset maximum threshold.
  • the display image frame period can be customized.
  • the display image frame period can be set to 4 frames, and the gradual decrease in each display image frame period can also be customized.
  • the gradual decrease can be set to 1% duty.
  • the duty is reduced by 1% every 4 frames, and the maximum backlight duty cycle of the current backlight partition is steadily reduced in each display image frame period until the maximum backlight duty cycle of the current backlight partition is equal to or less than the preset maximum threshold, and can be stopped.
  • the specific stop conditions can be customized.
  • the backlight control method in this embodiment can gradually reduce the heat of the lamp tube by steadily reducing the maximum backlight duty cycle of the current backlight partition in each display image frame period, and at the same time, the brightness of the displayed image will not change abruptly. Balance with heat dissipation, prolong lamp life, and ensure display quality while controlling costs.
  • the method further includes: acquiring a third duration for which the backlight duty cycle corresponding to the current backlight partition is smaller than the preset maximum threshold; when When the third duration is greater than the third time threshold, the maximum backlight duty cycle of the current backlight partition is increased.
  • a counter can be set to count the third duration of time when the duty cycle of the backlight corresponding to the current backlight partition is less than the preset maximum threshold.
  • the third time threshold can be customized. In one embodiment, the third time threshold is equal to the second time threshold. , for 5 minutes.
  • the lamp has dissipated heat, and the maximum backlight duty cycle of the current backlight partition can be increased to restore it. to the initial value or restore to the configuration value corresponding to the current display state of the display.
  • the maximum backlight duty cycle of the current backlight partition you can gradually increase it according to a custom algorithm. For example, you can customize the acceleration to gradually increase the maximum backlight duty cycle of the current backlight partition, or you can gradually increase the maximum backlight volume of the current backlight partition at a constant speed.
  • the duty cycle of the backlight wherein the increasing speed can be determined by increasing the preset number of frames by the preset amplitude.
  • the maximum allowable brightness of the lamp tube can be increased imperceptibly, so that the lamp tube can meet the screen design according to a specific standard. And the maximum brightness produced, not only to protect the lamp from overheating and burning, but also to try to achieve the maximum display brightness of the display.
  • step 206 includes: determining the corresponding current display window ratio according to the current display image of the display screen; determining the corresponding configuration value for the maximum backlight duty ratio of each backlight partition of the display screen based on the current display window ratio .
  • the proportion of the current display window is determined according to the brightness of the current display screen.
  • the target backlight partition corresponding to the display area exceeding the preset brightness threshold can be counted.
  • the current display window proportion and brightness can be obtained.
  • the maximum backlight duty cycle determines the maximum brightness that the backlight partition can display.
  • a higher maximum backlight duty cycle can be set, such as the maximum The backlight duty cycle is 100%.
  • the maximum backlight duty cycle corresponding to the backlight partition continues to decrease until the window ratio is greater than the first At a preset window threshold, the maximum backlight duty cycle corresponding to the backlight partition remains unchanged.
  • the window continues to increase, it means that the number of lamps in the display screen whose brightness exceeds the preset brightness threshold increases, and the heat generated by the lamps increases. At this time, it is necessary to reduce the maximum backlight duty cycle corresponding to the backlight partition, so as to reduce the heat of the lamps and protect the light tube.
  • the backlight control method in this embodiment can determine the corresponding configuration value for the maximum backlight duty cycle of each backlight partition of the display screen according to the current proportion of the display window, so as to achieve dynamic configuration, the configuration is flexible and conforms to the characteristics of the human eye, and the lamp can be adjusted flexibly. tube for protection.
  • the backlight control method further includes: when the display brightness change corresponding to a preset proportion of the backlight partitions in the display screen exceeds a brightness change threshold, determining that the display screen is switched between scenes.
  • the statistics of the display brightness changes corresponding to the preset proportions of the backlight partitions in the display screen can be obtained through the grayscale histogram algorithm.
  • the display brightness changes corresponding to the preset proportions of the backlight partitions in the display screen exceed the brightness change threshold, such as When more than 10% of the lamps have more than one grayscale change, it is determined that the display screen has switched scenes.
  • the backlight control method in this embodiment it is efficient and convenient to determine that the display screen is switched between scenes by determining that the display brightness change corresponding to the backlight partition of the preset ratio exceeds the brightness change threshold.
  • FIG. 4 and FIG. 5 it is a schematic flowchart of a backlight control method in one embodiment.
  • the display screen includes 210 backlight partitions, and each backlight partition includes 2 lamps.
  • each backlight partition includes 2 lamps.
  • the lamps are processed separately through 2 layers of logic. Protection, the specific process is as follows:
  • the first layer of logic is based on a single backlight partition, and each backlight partition has 3 parameters, namely:
  • the duty value input to the current backlight partition is the maximum duty value allocation table corresponding to the current backlight partition when the 40% power allocation algorithm occupies different display windows.
  • the maximum duty value corresponding to the current backlight partition determines the actual duty value of each backlight partition.
  • the value of parameter c is determined in real time to adjust the brightness of the lamp tube; the first timer counts the duration of the backlight duty cycle corresponding to the current backlight partition exceeding 60% duty, when the duration exceeds 40 seconds, then slowly reduce the maximum duty value allowed by the lamps of the current backlight partition, which can protect the actual duty of the lamps not to exceed the duty range specified by the hardware.
  • the duty range is required to be 60%.
  • the parameters a, b, and c are reset, the first timer is cleared, and the maximum value of each backlight partition of the display screen is reset.
  • the duty cycle of the backlight is restored to the configuration value corresponding to the current display state of the display screen, and the brightness is immediately reset to the maximum after the scene switching to ensure the display image quality after the scene switching.
  • the second layer of logic is based on a single backlight partition, and each backlight partition has 3 parameters, namely:
  • the second timer is used to count the duration of the backlight duty cycle corresponding to the current backlight partition exceeding 60% duty.
  • the second timer does not need to be reset when the screen is switched to a larger scene.
  • the duration exceeds 5 minutes (that is, 300 seconds)
  • the duty cycle of the backlight corresponding to the current backlight partition does not exceed 60% duty for a period of time, the lamp has dissipated heat, the timing trigger function of parameter b will be restored, and the maximum duty allowed by parameter c will also return to the initial value, or according to the current display on the display
  • the state returns to the corresponding configuration value, and the display brightness increases.
  • the second timer When the second timer counts the backlight duty cycle corresponding to the current backlight partition exceeding 60% duty for more than 5 minutes, it is also possible to reset each parameter, and then return to continue to count the backlight duty cycle corresponding to the current backlight partition exceeding 60% duty.
  • the step of 60% duty duration if the second timer counts the duration of the backlight duty cycle corresponding to the current backlight partition exceeding 60% duty for less than 5 minutes, the logic part of the first layer can be entered.
  • the two-layer logic can automatically reduce the maximum backlight duty cycle of the current backlight partition when the backlight duty cycle is continuously greater than the preset maximum threshold, which will imperceptibly reduce the maximum allowable display brightness, so as to reach the light
  • the purpose of cooling the tube is to prolong the life of the lamp.
  • the display of the screen will not be affected by the previous adjustment of the maximum backlight duty cycle of the current backlight partition, so as to ensure the display quality of the screen when the scene is switched, and wait for the lamp to cool down.
  • the maximum allowable brightness will be increased indiscernibly, so that the lamp tube can reach the maximum brightness of the screen designed and manufactured according to a specific standard, protect the lamp tube from overheating and burn out, and try to achieve the purpose of the maximum display brightness of the screen.
  • steps in the flowcharts of FIGS. 2-5 are shown in sequence according to the arrows, these steps are not necessarily executed in the sequence shown by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited to the order, and these steps may be performed in other orders. Moreover, at least a part of the steps in FIGS. 2-5 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed and completed at the same time, but may be executed at different times. These sub-steps or stages are not necessarily completed at the same time. The order of execution of the steps is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of sub-steps or stages of other steps.
  • FIG. 7 is a structural block diagram of a backlight control apparatus according to one embodiment.
  • a backlight control device includes an acquisition module 402, a reduction module 404, and a recovery module 406, wherein:
  • the obtaining module 402 is configured to obtain the first duration of time when the duty cycle of the backlight corresponding to the current backlight partition is greater than the preset maximum threshold, and the current backlight partition is the backlight partition in the display screen.
  • a reducing module 404 is configured to reduce the maximum backlight duty cycle of the current backlight partition according to the preset maximum threshold when the first duration is greater than the first time threshold.
  • the restoration module 406 is configured to restore the maximum backlight duty cycle of each backlight partition of the display screen to a configuration value corresponding to the current display state of the display screen when a scene switching of the display screen is detected.
  • the backlight control device in this embodiment obtains the first duration of time when the duty cycle of the backlight corresponding to the current backlight partition is greater than the preset maximum threshold; when the first duration is greater than the first time threshold, decreases according to the preset maximum threshold The maximum backlight duty cycle of the current backlight partition; when the screen scene switching is detected, the maximum backlight duty cycle of each backlight partition of the display screen is restored to the configuration value corresponding to the current display state of the display screen. In this way, when the backlight duty cycle is continuously greater than the preset maximum threshold, the maximum backlight duty cycle of the current backlight partition can be automatically reduced, thereby reducing the brightness, reducing the temperature of the lamp tube, and prolonging the life of the lamp tube.
  • the display of the picture is not affected by the previous adjustment of the maximum backlight duty cycle of the current backlight partition, which ensures the display quality of the picture when the scene is switched. There is no need to add additional heat dissipation devices, and the balance between display quality and heat dissipation is achieved. Cost control Guaranteed display quality.
  • the acquiring module 402 is further configured to count the first duration by using the first timer corresponding to the current backlight partition.
  • the device also includes:
  • the clearing module 408 is configured to clear the first timer when the maximum backlight duty cycle of the current backlight partition is reduced according to the preset maximum threshold, and clear the first timer when the display screen scene is switched.
  • the backlight control device in this embodiment when starting to adjust the maximum backlight duty ratio of the current backlight partition or switching the display screen scene, clears the first timer, so that the first timer can work normally and the timing is accurate. When conditions are met, it is automatically cleared and intelligently counts the time.
  • the apparatus further includes:
  • the adjustment module 410 is configured to count the second duration time of the backlight duty cycle corresponding to the current backlight partition that is greater than the preset maximum threshold through the second timer corresponding to the current backlight partition, and when the second duration is greater than the second time threshold, according to The preset maximum threshold reduces the maximum backlight duty cycle of the current backlight partition, clears the second timer, and the second time threshold is greater than the first time threshold.
  • the backlight control device in this embodiment through the auxiliary function of the second timer, can also pass the time when the display screen keeps switching scenes and the first timer is cleared and the duration of the backlight duty cycle greater than the preset maximum threshold cannot be counted.
  • the second timer performs statistics, so that when the second time threshold is reached, the maximum backlight duty cycle of the current backlight partition is automatically reduced, so as to protect the lamp tube and prolong the life of the lamp tube.
  • the reducing module 404 or the adjusting module 410 is further configured to gradually reduce the corresponding maximum backlight duty cycle for the current backlight partition according to the display image frame period, until the maximum backlight duty cycle of the current backlight partition is equal to or less than Preset maximum threshold.
  • the backlight control device in this embodiment can gradually reduce the heat of the lamp tube by steadily reducing the maximum backlight duty cycle of the current backlight partition during each display image frame period, and at the same time, the brightness of the displayed image will not change abruptly. Balance with heat dissipation, prolong lamp life, and ensure display quality while controlling costs.
  • the apparatus further includes:
  • the increasing module 412 is used to obtain the third duration time when the backlight duty cycle corresponding to the current backlight partition is smaller than the preset maximum threshold, and when the third duration is greater than the third time threshold, increase the maximum backlight duty cycle of the current backlight partition Compare.
  • the backlight control device in this embodiment increases the maximum backlight duty cycle of the current backlight partition after the lamp is cooled, so that the maximum allowable brightness of the lamp is imperceptibly increased, so that the lamp can meet the screen design according to a specific standard. And the maximum brightness produced, not only protects the lamp from overheating and burns, but also tries to achieve the maximum display brightness of the display.
  • the recovery module 406 is further configured to determine the corresponding current display window ratio according to the current display image of the display screen, and determine the corresponding current display window ratio for the maximum backlight duty ratio of each backlight partition of the display screen based on the current display window ratio configuration value.
  • the backlight control device in this embodiment can determine the corresponding configuration value for the maximum backlight duty cycle of each backlight partition of the display screen according to the current display window ratio, so as to achieve dynamic configuration, the configuration is flexible and conforms to the characteristics of the human eye, and it can adjust the light tube for protection.
  • the apparatus further includes:
  • the determining module 414 is configured to determine that the display screen is switched between scenes when the display brightness change corresponding to the preset proportion of the backlight partitions in the display screen exceeds the brightness change threshold.
  • the backlight control device in this embodiment determines that the display screen is switched between scenes by determining that the display screen is switched between scenes according to the change of the display brightness corresponding to the backlight partition of the preset ratio exceeding the brightness change threshold, which is efficient and convenient.
  • each module in the above backlight control device is only used for illustration. In other embodiments, the backlight control device can be divided into different modules as required to complete all or part of the functions of the above backlight control device.
  • Each module in the above-mentioned backlight control device can be implemented in whole or in part by software, hardware and combinations thereof.
  • the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.
  • FIG. 8 is a schematic diagram of the internal structure of an electronic device in one embodiment.
  • the electronic device includes a processor and a memory connected by a system bus.
  • the processor is used to provide computing and control capabilities to support the operation of the entire electronic device.
  • the memory may include non-volatile storage media and internal memory.
  • the non-volatile storage medium stores an operating system and computer-readable instructions.
  • the computer-readable instructions can be executed by the processor to implement a backlight control method provided by the following embodiments.
  • Internal memory provides a cached execution environment for operating system computer-readable instructions in a non-volatile storage medium.
  • the electronic device can be a mobile phone, a TV, a tablet computer, a PDA (Personal Digital Assistant, personal digital assistant), a POS (Point of Sales, a sales terminal), a vehicle computer, a wearable device, and other electronic devices that include a display screen.
  • PDA Personal Digital Assistant, personal digital assistant
  • POS Point of Sales, a sales terminal
  • vehicle computer a wearable device
  • wearable device and other electronic devices that include a display screen.
  • each module in the backlight control apparatus may be in the form of computer-readable instructions.
  • the computer readable instructions can be executed on a terminal or server.
  • the program modules constituted by the computer readable instructions may be stored on the memory of the electronic device.
  • Embodiments of the present application also provide a computer-readable storage medium.
  • One or more non-volatile computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the backlighting of the various embodiments described above Control Method.
  • Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory.
  • Volatile memory may include random access memory (RAM), which acts as external cache memory.
  • RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Memory Bus (Rambus) Direct RAM (RDRAM), Direct Memory Bus Dynamic RAM (DRDRAM), and Memory Bus Dynamic RAM (RDRAM).
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchronous Link (Synchlink) DRAM
  • SLDRAM synchronous Link (Synchlink) DRAM
  • Memory Bus Radbus
  • RDRAM Direct RAM
  • DRAM Direct Memory Bus Dynamic RAM
  • RDRAM Memory Bus Dynamic RAM

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Abstract

一种背光控制方法、装置、电子设备和计算机可读存储介质，所述方法包括：获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间；当第一持续时间大于第一时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比，当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。

Description

背光控制方法、装置、电子设备和计算机可读存储介质
本申请要求于2020年10月30日提交中国专利局，申请号为2020111910345，申请名称为“背光控制方法、装置、电子设备和可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示屏显示技术领域，特别是涉及一种背光控制方法、装置、电子设备和计算机可读存储介质。
背景技术
随着显示技术的发展，通常采用背光调制技术控制背光源亮度，背光源的发光效果将直接影响到显示的视觉效果。
在长时间点亮时，光源温度会直线上升，导致显示设备温度上升，影响灯管寿命。
发明内容
根据本申请公开的各种实施例，提供了一种背光控制方法、装置、电子设备、计算机可读存储介质。
一种背光控制方法，由电子设备执行，所述方法包括：
获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，所述当前背光分区为显示屏中的背光分区；
当所述第一持续时间大于第一时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比；及
当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
一种背光控制装置，包括：
获取模块，用于获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，所述当前背光分区为显示屏中的背光分区；
减小模块，用于当所述第一持续时间大于第一时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比；及
恢复模块，用于当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
一种计算机设备，包括存储器和一个或多个处理器，所述存储器存储有计算机可读指令，所述计算机可读指令被所述一个或多个处理器执行时，使得所述一个或多个处理器执行上述背光控制方法的步骤。
一个或多个存储有计算机可读指令的非易失性计算机可读存储介质，其上存储有计算机可读指令，所述计算机可读指令被一个或多个处理器执行时，使得所述一个或多个处理 器执行上述背光控制方法的步骤。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征和优点将从说明书、附图以及权利要求书变得明显
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为一个或多个实施例中背光控制方法的应用环境图；
图2为一个或多个实施例中背光控制方法的流程图；
图3为另一个或多个实施例中背光控制方法的流程图；
图4为一个或多个具体的实施例中通过第一层逻辑进行背光控制的流程示意图；
图5为一个或多个具体的实施例中通过第二层逻辑进行背光控制的流程示意图；
图6为一个或多个实施例中不同显示窗口占比时，当前背光分区对应的最大duty值分配表示意图；
图7为一个或多个实施例中背光控制装置的结构框图；
图8为一个或多个实施例中电子设备的内部结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
可以理解，本申请所使用的术语“第一”、“第二”等可在本文中用于描述各种数据，但这些数据不受这些术语限制。这些术语仅用于将第一个数据与另一个数据区分。举例来说，在不脱离本申请的范围的情况下，可以将第一持续时间称为第二持续时间，且类似地，可将第二持续时间称为第一持续时间。第一持续时间和第二持续时间两者都是持续时间，但其不是同一持续时间。
图1为其中一个实施例中背光控制方法的应用环境示意图。如图1所示，该应用环境包括显示屏102，其中显示屏102包括多个背光分区，每个背光分区包括至少一个背光源，通过调整每个背光分区的背光占空比，实现对不同背光分区的背光亮度进行调整。其中，显示屏102可以但不限于是各种电视、个人计算机、笔记本电脑、智能手机、平板电脑和便携式可穿戴设备的显示屏。根据显示屏显示画面的不同，每个背光分区都存在对应的背光占空比，获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比，当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。现有技术在控制背光源亮度时，通常通过增加散热装置来减缓显示设备的温度上升，存在增加显示设备成本的问题。
图2为其中一个实施例中背光控制方法的流程图。本实施例中的背光控制方法，以运 行于图1中的显示屏102上为例进行描述。方法以下步骤：
步骤202，获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间。
当前背光分区是显示屏中的任一个背光分区，背光占空比duty是指在一个脉冲循环内，通电时间相对于总时间所占的比例，如脉冲宽度1μs，信号周期4μs的脉冲序列占空比为0.25。在其中一个实施例中，显示屏包括210个背光分区，每个背光分区包括2个灯管。
具体地，以背光分区为单位对背光占空比进行调节，预设最大阈值根据灯管的属性可不同，在其中一个实施例中，单个灯管超过60％的duty，时间超过5分钟有烧坏灯管的风险，因此可以将预设最大阈值设置为60％。第一持续时间可通过计数器统计得到。不同的背光分区对应不同的背光占空比，在其中一个实施例中，根据显示屏的显示窗口占比为背光分区分配不同的最大背光占空比，如当窗口占比大于第一预设窗口阈值时，使得背光分区维持第一预设最大背光占空比不变，当窗口占比小于第二预设窗口阈值时，使得背光分区维持第二预设最大背光占空比不变，其中第一预设窗口阈值大于第二预设窗口阈值，第一预设最大背光占小于第二预设最大背光占空比。当窗口占比在第二预设窗口阈值与第一预设窗口阈值之间时，使得背光分区对应的最大背光占空比随着窗口占比的增大而减小。在其中一个实施例中，第一预设窗口阈值为70％，第二预设窗口阈值为15％，第一预设最大背光占空比为40％，第二预设最大背光占空比为100％。即窗口占比小于15％时，背光分区对应的最大背光占空比为100％，当窗口占比大于或等于15％且小于或等于70％时，随着窗口不断增大，背光分区对应的最大背光占空比不断减小，直到窗口占比大于70％时，背光分区对应的最大背光占空比维持40％不变。
步骤204，当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比。
第一时间阈值可以自定义，在其中一个实施例中，第一时间阈值是根据播放视频内容与人眼特性统计得到的经验值，如第一持续时间为40S，常规情况下一个画面维持在当前状态一般不会超过40秒，比如当前播放一个太阳，太阳对应的亮度为最大值，如果超过40秒太阳位置对应的背光分区的灯管会开始发烫，则需要将此位置的背光分区的最大背光占空比减小，从而减小亮度，降低灯管温度。
具体地，根据预设最大阈值减小当前背光分区的最大背光占空比，可逐渐减小当前背光分区的最大背光占空比至等于或小于预设最大阈值。逐渐减小的算法可自定义，如可自定义加速度逐渐减小当前背光分区的最大背光占空比，也可以匀速逐渐减小当前背光分区的最大背光占空比。减小速度可通过预设帧数固定减小预设幅度来确定。
步骤206，当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
具体地，场景切换是指显示屏的显示内容发生了场景上的变化，可通过显示内容变化的幅度超过预设阈值来检测场景切换，可通过检测发生超过预设灰度变化的灯管的占比来判定是否发生场景切换。显示屏当前显示状态可根据最大背光占空比的配置策略确定，如配置策略为根据窗口大小确定各个背光分区的最大背光占空比，则显示屏当前显示状态为根据显示屏当前显示画面确定的显示窗口占比，如当前显示画面为月亮对应的显示窗口占比为20％，当前显示画面为星星对应的显示窗口占比为10％。当配置策略为各个背光分区 的最大背光占空比根据其它显示参数变化时，则显示屏当前显示状态可为其它显示参数，如感兴趣区域大小等。将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值，便于在发生场景切换时，画面的显示不受到之前调整当前背光分区的最大背光占空比的影响，保证发生场景切换时画面的显示质量。
本实施例中的背光控制方法，通过获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间；当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比；当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。这样，能在背光占空比持续大于预设最大阈值时，自动减小当前背光分区的最大背光占空比，从而减小亮度，降低灯管温度，延长灯管寿命，在发生场景切换时，画面的显示不受到之前调整当前背光分区的最大背光占空比的影响，保证发生场景切换时画面的显示质量，无需增加额外的散热装置，在显示质量与散热间达到平衡，在控制成本的情况下保证显示质量。
在其中一个实施例中，步骤202包括：通过当前背光分区对应的第一计时器统计第一持续时间。该背光控制方法还包括：当根据预设最大阈值减小当前背光分区的最大背光占空比时，将第一计时器清零，当显示屏场景切换时，将第一计时器清零。
具体地，每个背光分区都存在对应的第一计时器，用于统计第一持续时间，当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比，同时将第一计时器清零。在其中一个实施例中，当当前背光分区的最大背光占空比减至等于或小于预设最大阈值时，重启第一计时器的计时触发功能，从而在下一次当前背光分区对应的背光占空比大于预设最大阈值时，可以触发第一计时器的计时功能。当当前背光分区的最大背光占空比在逐渐减小的过程中，关闭第一计时器的计时触发功能，在调整的过程中虽然当前背光分区对应的背光占空比大于预设最大阈值，但已经开始调整，无需启动第一计时器的计时功能。当显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值，此时将第一计时器清零，当下一次当前背光分区对应的背光占空比大于预设最大阈值时，第一计时器重新开始计时。
本实施例中，当开始调整当前背光分区的最大背光占空比或显示屏场景切换时，将第一计时器清零，便于第一计时器能正常工作，计时准确，在达到条件时，自动清零，智能地统计时间。
在其中一个实施例中，如图3所示，该背光控制方法还包括：
步骤302，通过当前背光分区对应的第二计时器统计当前背光分区对应的背光占空比大于预设最大阈值的第二持续时间。
具体地，每个背光分区都存在对应的第二计时器，第二计时器与第一计时器的计时规则不同，显示屏场景切换时，第二计时器不会清零。
步骤304，当第二持续时间大于第二时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比，将第二计时器清零，第二时间阈值大于第一时间阈值。
第二时间阈值可以自定义，第二时间阈值大于第一时间阈值。在其中一个实施例中，第二时间阈值是灯管有烧坏风险的临界值，如单个灯管超过60％的duty，时间超过5分钟有烧坏灯管的风险，则可将第二时间阈值设置为5分钟。
具体地，当第二持续时间大于第二时间阈值时，根据预设最大阈值减小当前背光分区 的最大背光占空比，可逐渐减小当前背光分区的最大背光占空比至等于或小于预设最大阈值。逐渐减小的算法可自定义，如可自定义加速度逐渐减小当前背光分区的最大背光占空比，也可以匀速逐渐减小当前背光分区的最大背光占空比。减小速度可通过预设帧数固定减小预设幅度来确定。同时将第二计时器清零。因为显示屏场景切换时，第二计时器不会清零，如果显示屏一直场景切换，第二计时器的计时时间达到第二时间阈值，如5分钟，就要把duty降下来，减小当前背光分区的最大背光占空比。
本实施例中的背光控制方法，通过第二计时器的辅助作用，在显示屏一直场景切换，第一计时器清零无法统计背光占空比大于预设最大阈值的持续时间时，也能通过第二计时器进行统计，从而在达到第二时间阈值时，自动减小当前背光分区的最大背光占空比，保护灯管，延长灯管寿命。
在其中一个实施例中，根据预设最大阈值减小当前背光分区的最大背光占空比包括：对于当前背光分区根据显示图像帧周期逐渐减少对应的最大背光占空比，直至当前背光分区的最大背光占空比等于或小于预设最大阈值。
具体地，显示图像帧周期可自定义，如设置显示图像帧周期为4帧，每个显示图像帧周期内逐渐减少的幅度也可自定义，如可设置每次逐渐减少的幅度为1％duty，则每4帧降低1％duty，在每个显示图像帧周期内平稳减少当前背光分区的最大背光占空比，直至当前背光分区的最大背光占空比等于或小于预设最大阈值，可停止，具体的停止条件可自定义。
本实施例中的背光控制方法，通过在每个显示图像帧周期内平稳减少当前背光分区的最大背光占空比，可逐渐降低灯管热度，同时显示图像画面的亮度不会突变，在显示质量与散热间达到平衡，延长灯管寿命，在控制成本的情况下保证显示质量。
在其中一个实施例中，根据预设最大阈值减小当前背光分区的最大背光占空比之后，还包括：获取当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间；当第三持续时间大于第三时间阈值时，增大当前背光分区的最大背光占空比。
可以通过设置计数器来统计当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间，第三时间阈值可以自定义，在其中一个实施例中，第三时间阈值等于第二时间阈值，为5分钟。
具体地，当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间超过第三时间阈值时，灯管已散热，可以增大当前背光分区的最大背光占空比，使其恢复至初始值或恢复至显示屏当前显示状态对应的配置值。增大当前背光分区的最大背光占空比可以按自定义的算法逐渐增大，如可自定义加速度逐渐增大当前背光分区的最大背光占空比，也可以匀速逐渐增大当前背光分区的最大背光占空比，其中，增大速度可通过预设帧数固定增大预设幅度来确定。
本实施例中的背光控制方法，等灯管降温后，通过增大当前背光分区的最大背光占空比，可以不易察觉地增加灯管允许的最大亮度，使灯管可达到屏幕按特定标准设计并制造的最大亮度，既保护灯管不会过热烧掉，又能尽量达到显示屏的最大显示亮度。
在其中一个实施例中，步骤206包括：根据显示屏的当前显示画面确定对应的当前显示窗口占比；基于当前显示窗口占比为显示屏各个背光分区的最大背光占空比确定对应的配置值。
当前显示窗口占比是根据当前显示画面的亮度确定的，可统计超过预设亮度阈值的显示区域对应的目标背光分区，根据目标背光分区占所有背光分区的比例，得到当前显示窗口占比，亮度超过预设亮度阈值的区域越大，对应的当前显示窗口占比越大。
具体地，当当前显示窗口占比不同时，为显示屏各个背光分区的最大背光占空比确定不同的配置值。最大背光占空比决定了背光分区能显示的最大亮度，在其中一个实施例中，当当前显示窗口占比小于第二预设窗口阈值时，可设置较高的最大背光占空比，如最大背光占空比为100％。当当前显示窗口占比在第二预设窗口阈值和第一预设窗口阈值之间时，随着窗口不断增大，背光分区对应的最大背光占空比不断减小，直到窗口占比大于第一预设窗口阈值时，背光分区对应的最大背光占空比维持不变。随着窗口不断增大说明显示屏中亮度超过预设亮度阈值的灯管增多，灯管发热量增大，此时需要减小背光分区对应的最大背光占空比，从而降低灯管热度，保护灯管。
本实施例中的背光控制方法，可通过当前显示窗口占比，为显示屏各个背光分区的最大背光占空比确定对应的配置值，达到动态配置，配置灵活符合人眼特性，并可对灯管进行保护。
在其中一个实施例中，该背光控制方法还包括：当显示屏中预设比例的背光分区对应的显示亮度变化超过亮度变化阈值时，判定显示屏发生场景切换。
具体地，通过灰度直方图算法可以获取显示屏中预设比例的背光分区对应的显示亮度变化统计情况，当显示屏中预设比例的背光分区对应的显示亮度变化超过亮度变化阈值时，如超过10％的灯管发生超过1个灰度变化时，判定显示屏发生场景切换。
本实施例中的背光控制方法，通过预设比例的背光分区对应的显示亮度变化超过亮度变化阈值判定显示屏发生场景切换，高效便利。
在其中一个具体的实施例中，如图4和图5所示，为一个实施例中背光控制方法的流程示意图。显示屏包括210个背光分区，每个背光分区包括2个灯管，当单个灯管超过60％的duty，时间超过5分钟有烧坏灯管的风险，通过2层逻辑各自运行处理进行灯管保护，具体过程如下：
1.如图4所示，第一层逻辑以单个背光分区为单位，每个背光分区有3个参数，分别为：
a。经过40％功率分配算法处理后，输入给当前背光分区的duty值，如图6所示，为40％功率分配算法在不同显示窗口占比时，当前背光分区对应的最大duty值分配表，根据当前背光分区对应的最大duty值，确定各个背光分区的实际duty值。
b。灯管超过60％duty值的持续时间
c。灯管允许的最大duty值
根据参数a,b的情况，实时地决定参数c的值，来调整灯管亮度；通过第一计时器统计当前背光分区对应的背光占空比超过60％duty的持续时间，当持续时间超过40秒，则缓慢减少当前背光分区的灯管允许的最大duty值，可以保护灯管实际duty不超过硬件规定的duty范围，本实施例中要求duty范围是60％。当当前背光分区对应的背光占空比不超过60％duty一段时间时，参数b计时触发功能会恢复，参数c允许最大duty也会恢复至初始值，或根据显示屏当前显示状态恢复至对应的配置值。
当超过10％的灯管发生超过1个灰度变化时，即画面发生较大场景切换时，参数a,b， c被重设置，第一计时器清零，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值，实现场景切换后亮度立刻重置到最大，保证场景切换后的显示图像质量。
2、如图5所示，第二层逻辑以单个背光分区为单位，每个背光分区有3个参数，分别为：
a。经过前面灯管保护第一层逻辑处理后，输入给当前背光分区的duty值
b。灯管超过60％duty值的持续时间
c。灯管允许的最大duty值
通过第二计时器统计当前背光分区对应的背光占空比超过60％duty的持续时间，第二计时器在画面发生较大场景切换时，无需清零，当持续时间超过5分钟(即300秒)，缓慢减少当前背光分区的灯管可以达到的最大duty值，直到使灯管实际duty不超过60％duty。当当前背光分区对应的背光占空比不超过60％duty一段时间时，灯管已散热，参数b计时触发功能会恢复，参数c允许最大duty也会恢复至初始值，或根据显示屏当前显示状态恢复至对应的配置值，显示亮度增加。在第二计时器统计当前背光分区对应的背光占空比超过60％duty的持续时间超过5分钟时，也可以对各个参数进行复位操作，然后返回继续统计当前背光分区对应的背光占空比超过60％duty的持续时间的步骤，如果第二计时器统计当前背光分区对应的背光占空比超过60％duty的持续时间未超过5分钟，则可进入第一层逻辑部分。
本实施例中，通过二层逻辑能在背光占空比持续大于预设最大阈值时，自动减小当前背光分区的最大背光占空比，会不易察觉地降低允许显示的最大亮度，达到给灯管降温的目的，延长灯管寿命，在发生场景切换时，画面的显示不受到之前调整当前背光分区的最大背光占空比的影响，保证发生场景切换时画面的显示质量，而等灯管降温后，会再不易察觉地增加允许的最大亮度，使灯管可达到屏幕按特定标准设计并制造的最大亮度，保护灯管不会过热烧掉，又能尽量达到屏的最大显示亮度的目的，无需增加额外的散热装置，在显示质量与散热间达到平衡，在控制成本的情况下保证显示质量。
应该理解的是，虽然图2-5的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，这些步骤可以以其它的顺序执行。而且，图2-5中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，这些子步骤或者阶段的执行顺序也不必然是依次进行，而是可以与其它步骤或者其它步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
图7为其中一个实施例的背光控制装置的结构框图。如图7所示，一种背光控制装置，包括获取模块402、减小模块404、恢复模块406，其中：
获取模块402，用于获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，当前背光分区为显示屏中的背光分区。
减小模块404，用于当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当 前背光分区的最大背光占空比。
恢复模块406，用于当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
本实施例中的背光控制装置，通过获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间；当第一持续时间大于第一时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比；当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。这样，能在背光占空比持续大于预设最大阈值时，自动减小当前背光分区的最大背光占空比，从而减小亮度，降低灯管温度，延长灯管寿命，在发生场景切换时，画面的显示不受到之前调整当前背光分区的最大背光占空比的影响，保证发生场景切换时画面的显示质量，无需增加额外的散热装置，在显示质量与散热间达到平衡，在控制成本的情况下保证显示质量。
在其中一个实施例中，获取模块402还用于通过当前背光分区对应的第一计时器统计第一持续时间。
装置还包括：
清零模块408，用于当根据预设最大阈值减小当前背光分区的最大背光占空比时，将第一计时器清零，当显示屏场景切换时，将第一计时器清零。
本实施例中的背光控制装置，当开始调整当前背光分区的最大背光占空比或显示屏场景切换时，将第一计时器清零，便于第一计时器能正常工作，计时准确，在达到条件时，自动清零，智能地统计时间。
在其中一个实施例中，装置还包括：
调整模块410，用于通过当前背光分区对应的第二计时器统计当前背光分区对应的背光占空比大于预设最大阈值的第二持续时间，当第二持续时间大于第二时间阈值时，根据预设最大阈值减小当前背光分区的最大背光占空比，将第二计时器清零，第二时间阈值大于第一时间阈值。
本实施例中的背光控制装置，通过第二计时器的辅助作用，在显示屏一直场景切换，第一计时器清零无法统计背光占空比大于预设最大阈值的持续时间时，也能通过第二计时器进行统计，从而在达到第二时间阈值时，自动减小当前背光分区的最大背光占空比，保护灯管，延长灯管寿命。
在其中一个实施例中，减小模块404或调整模块410还用于对于当前背光分区根据显示图像帧周期逐渐减少对应的最大背光占空比，直至当前背光分区的最大背光占空比等于或小于预设最大阈值。
本实施例中的背光控制装置，通过在每个显示图像帧周期内平稳减少当前背光分区的最大背光占空比，可逐渐降低灯管热度，同时显示图像画面的亮度不会突变，在显示质量与散热间达到平衡，延长灯管寿命，在控制成本的情况下保证显示质量。
在其中一个实施例中，装置还包括：
增大模块412，用于获取当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间，当第三持续时间大于第三时间阈值时，增大当前背光分区的最大背光占空比。
本实施例中的背光控制装置，等灯管降温后，通过增大当前背光分区的最大背光占空比，会不易察觉地增加灯管允许的最大亮度，使灯管可达到屏幕按特定标准设计并制造的 最大亮度，既保护灯管不会过热烧掉，又能尽量达到显示屏的最大显示亮度。
在其中一个实施例中，恢复模块406还用于根据显示屏的当前显示画面确定对应的当前显示窗口占比，基于当前显示窗口占比为显示屏各个背光分区的最大背光占空比确定对应的配置值。
本实施例中的背光控制装置，可通过当前显示窗口占比，为显示屏各个背光分区的最大背光占空比确定对应的配置值，达到动态配置，配置灵活符合人眼特性，并可对灯管进行保护。
在其中一个实施例中，装置还包括：
判定模块414，用于当显示屏中预设比例的背光分区对应的显示亮度变化超过亮度变化阈值时，判定显示屏发生场景切换。
本实施例中的背光控制装置，通过预设比例的背光分区对应的显示亮度变化超过亮度变化阈值判定显示屏发生场景切换，高效便利。
上述背光控制装置中各个模块的划分仅仅用于举例说明，在其他实施例中，可将背光控制装置按照需要划分为不同的模块，以完成上述背光控制装置的全部或部分功能。
关于背光控制装置的具体限定可以参见上文中对于背光控制方法的限定，在此不再赘述。上述背光控制装置中的各个模块可全部或部分通过软件、硬件及其组合来实现。上述各模块可以硬件形式内嵌于或独立于计算机设备中的处理器中，也可以以软件形式存储于计算机设备中的存储器中，以便于处理器调用执行以上各个模块对应的操作。
图8为一个实施例中电子设备的内部结构示意图。如图8所示，该电子设备包括通过系统总线连接的处理器和存储器。其中，该处理器用于提供计算和控制能力，支撑整个电子设备的运行。存储器可包括非易失性存储介质及内存储器。非易失性存储介质存储有操作系统和计算机可读指令。该计算机可读指令可被处理器所执行，以用于实现以下各个实施例所提供的一种背光控制方法。内存储器为非易失性存储介质中的操作系统计算机可读指令提供高速缓存的运行环境。该电子设备可以是手机、电视、平板电脑、PDA(Personal Digital Assistant，个人数字助理)、POS(Point of Sales，销售终端)、车载电脑、穿戴式设备等任意包括显示屏的电子设备。
本申请实施例中提供的背光控制装置中的各个模块的实现可为计算机可读指令的形式。该计算机可读指令可在终端或服务器上运行。该计算机可读指令构成的程序模块可存储在电子设备的存储器上。该计算机可读指令被处理器执行时，实现本申请实施例中所描述方法的步骤。
在本申请实施例中，电子设备所包括的一个或多个处理器执行存储在存储器上的计算机可读指令时实现上述各个实施例中的背光控制方法。
本申请实施例还提供了一种计算机可读存储介质。一个或多个包含计算机可执行指令的非易失性计算机可读存储介质，当所述计算机可执行指令被一个或多个处理器执行时，使得所述处理器执行上述各个实施例中的背光控制方法。
一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各个 实施例中的背光控制方法。
本申请所使用的对存储器、存储、数据库或其它介质的任何引用可包括非易失性和/或易失性存储器。非易失性存储器可包括只读存储器(ROM)、可编程ROM(PROM)、电可编程ROM(EPROM)、电可擦除可编程ROM(EEPROM)或闪存。易失性存储器可包括随机存取存储器(RAM)，它用作外部高速缓冲存储器。作为说明而非局限，RAM以多种形式可得，诸如静态RAM(SRAM)、动态RAM(DRAM)、同步DRAM(SDRAM)、双数据率SDRAM(DDR SDRAM)、增强型SDRAM(ESDRAM)、同步链路(Synchlink)DRAM(SLDRAM)、存储器总线(Rambus)直接RAM(RDRAM)、直接存储器总线动态RAM(DRDRAM)、以及存储器总线动态RAM(RDRAM)。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (16)

  1. 一种背光控制方法，由电子设备执行，所述方法包括：
    获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，所述当前背光分区为显示屏中的背光分区；
    当所述第一持续时间大于第一时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比；及
    当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
  2. 根据权利要求1所述的方法，其中，所述获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，包括：
    通过当前背光分区对应的第一计时器统计所述第一持续时间；
    所述方法还包括：
    当根据所述预设最大阈值减小所述当前背光分区的最大背光占空比时，将所述第一计时器清零；及
    当所述显示屏场景切换时，将所述第一计时器清零。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：
    通过当前背光分区对应的第二计时器统计当前背光分区对应的背光占空比大于预设最大阈值的第二持续时间；及
    当所述第二持续时间大于第二时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比，将所述第二计时器清零，所述第二时间阈值大于所述第一时间阈值。
  4. 根据权利要求1至3任一项所述的方法，其中，所述根据所述预设最大阈值减小所述当前背光分区的最大背光占空比包括：
    对于当前背光分区根据显示图像帧周期逐渐减少对应的最大背光占空比，直至当前背光分区的最大背光占空比等于或小于所述预设最大阈值。
  5. 根据权利要求1至3任一项所述的方法，其中，所述根据所述预设最大阈值减小所述当前背光分区的最大背光占空比之后，还包括：
    获取当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间；及
    当所述第三持续时间大于第三时间阈值时，增大所述当前背光分区的最大背光占空比。
  6. 根据权利要求1所述的方法，其中，所述将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值包括：
    根据显示屏的当前显示画面确定对应的当前显示窗口占比；及
    基于所述当前显示窗口占比为所述显示屏各个背光分区的最大背光占空比确定对应的配置值。
  7. 根据权利要求1所述的方法，其中，所述方法还包括：
    当显示屏中预设比例的背光分区对应的显示亮度变化超过亮度变化阈值时，判定所述显示屏发生场景切换。
  8. 一种背光控制装置，其中，包括：
    获取模块，用于获取当前背光分区对应的背光占空比大于预设最大阈值的第一持续时间，所述当前背光分区为显示屏中的背光分区；
    减小模块，用于当所述第一持续时间大于第一时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比；及
    恢复模块，用于当检测到显示屏场景切换时，将显示屏各个背光分区的最大背光占空比恢复至与显示屏当前显示状态对应的配置值。
  9. 根据权利要求8所述的装置，其中，所述获取模块还用于通过当前背光分区对应的第一计时器统计所述第一持续时间，所述装置还包括：
    清零模块，用于当根据所述预设最大阈值减小所述当前背光分区的最大背光占空比时，将所述第一计时器清零，当所述显示屏场景切换时，将所述第一计时器清零。
  10. 根据权利要求9所述的装置，其中，所述装置还包括：
    调整模块，用于通过当前背光分区对应的第二计时器统计当前背光分区对应的背光占空比大于预设最大阈值的第二持续时间，当所述第二持续时间大于第二时间阈值时，根据所述预设最大阈值减小所述当前背光分区的最大背光占空比，将所述第二计时器清零，所述第二时间阈值大于所述第一时间阈值。
  11. 根据权利要求8至10任一所述的装置，其中，所述减小模块或所述调整模块还用于对于当前背光分区根据显示图像帧周期逐渐减少对应的最大背光占空比，直至当前背光分区的最大背光占空比等于或小于所述预设最大阈值。
  12. 根据权利要求8至10任一所述的装置，其中，所述装置还包括：
    增大模块，用于获取当前背光分区对应的背光占空比小于预设最大阈值的第三持续时间，当所述第三持续时间大于第三时间阈值时，增大所述当前背光分区的最大背光占空比。
  13. 根据权利要求8所述的装置，其中，所述恢复模块还用于根据显示屏的当前显示画面确定对应的当前显示窗口占比，基于所述当前显示窗口占比为所述显示屏各个背光分区的最大背光占空比确定对应的配置值。
  14. 根据权利要求8所述的装置，其中，所述装置还包括：
    判断模块，用于当显示屏中预设比例的背光分区对应的显示亮度变化超过亮度变化阈值时，判定所述显示屏发生场景切换。
  15. 一种电子设备，包括存储器及一个或多个处理器，所述存储器中储存有计算机可读指令，其中，所述计算机可读指令被所述一个或多个处理器执行时，使得所述一个或多个处理器执行如权利要求1至7中任一项所述的方法的步骤。
  16. 一个或多个存储有计算机可读指令的计算机可读存储介质，计算机可读指令被一个或多个处理器执行时，使得实现如权利要求1至7中任一项所述的方法的步骤。
PCT/CN2021/123190 2020-10-30 2021-10-12 背光控制方法、装置、电子设备和计算机可读存储介质 WO2022089191A1 (zh)

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