CN115762427A - Display screen brightness control method and device, display screen and storage medium - Google Patents
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Abstract
The application is applicable to the technical field of display control, and provides a display screen backlight brightness control method, a display screen backlight brightness control device, a display screen and a storage medium, wherein the method comprises the following steps: acquiring a total current value of display screen backlight, wherein the display screen has one or more partitions, and the total current value is the sum of current values of all the partitions in the display screen backlight; when the total current value is larger than a preset total current threshold value, acquiring the current value of each subarea; and carrying out current limiting adjustment on the current value of each subarea to ensure that the adjusted total current value is less than or equal to a preset total current threshold value. This application can carry out automatic control to the luminance change in a poor light of display screen, prevents that luminance too high from haring people's eyes, also can reduce the consumption of display screen.
Description
Technical Field
The application belongs to the technical field of display control, and particularly relates to a display screen brightness control method and device, a display screen and a storage medium.
Background
With the development of display technology, the lcd with multi-partition local dimming backlight has been widely used because the display effect is better. The liquid crystal display with the multi-partition regional dimming backlight comprises a plurality of partitions formed by a plurality of Mini-LEDs, wherein each partition is internally provided with 1 or a plurality of LED lamps for backlight, and each partition can be independently dimmed. According to the image picture displayed by the screen, the brightness of each subarea is adjusted, so that the contrast of the liquid crystal display image is improved, and the picture is richer.
When the image picture is a full-screen black picture, all backlight LEDs are adjusted to be in a closed state; when the image picture is a full-screen white picture, all backlight LED lamps are adjusted to be in a state of highest brightness; the LED lamps in the multi-partition regional dimming display are quite large in number, when the brightness of an image picture is too high and a white picture region is large, most of the LED lamps in the partitions perform light emitting work, so that the displayed image picture is too bright and the eyes of people are damaged.
Disclosure of Invention
The embodiment of the application provides a display screen brightness control method and device, a display screen and a storage medium, and can solve the problem that displayed image pictures are too bright and damage eyes of people.
In a first aspect, an embodiment of the present application provides a method for controlling brightness of a display screen, where the method includes the following steps:
in a possible implementation manner of the first aspect, a total current value of a display screen backlight is obtained, where the display screen has one or more partitions, and the total current value is a sum of current values of all partitions in the display screen backlight;
when the total current value is larger than a preset total current threshold value, acquiring the current value of each subarea;
and carrying out current limiting adjustment on the current value of each subarea to ensure that the adjusted total current value is less than or equal to a preset total current threshold value.
In a possible implementation manner of the first aspect, the obtaining a total current value of a display screen backlight includes:
converting the total current of the display screen backlight into an analog voltage signal, wherein the current of the display screen backlight is the sum of the currents of all the partitions in the display screen backlight;
acquiring the analog voltage signal within a preset interval time;
and converting the obtained analog voltage into a total current value, wherein the total current value is digital data.
In a possible implementation manner of the first aspect, each of the partitions has a same preset maximum partition current value, where a current value in each of the partitions does not exceed the maximum partition current value;
the maximum zone current value is adjusted along with the change of the total current value.
In a possible implementation manner of the first aspect, the adjusting the maximum divisional current value along with the change of the total current value includes:
when the total current value is larger than the preset total current threshold, averagely distributing the preset total current threshold according to the number of partitions to obtain partition average current thresholds, and adjusting the maximum partition current value in each partition to be the partition average current threshold;
and when the total current value is less than or equal to the preset total current threshold value, restoring the maximum partition current value to a preset maximum partition current value.
In a possible implementation manner of the first aspect, performing current-limiting adjustment on the current value of each partition includes:
and adjusting the current value of each subarea according to the product of the preset total current threshold value and the proportion of the current value of each subarea in the total current value.
In a possible implementation manner of the first aspect, adjusting the current values of the partitions according to a product of the preset total current threshold and a proportion of the current value in each partition in the total current value includes:
acquiring the preset total current threshold;
dividing the current value in each partition by the total current value to obtain the proportion of the current value in each partition in the total current value;
multiplying the proportion by the preset total current threshold value to obtain a multiplication result which is the adjustment current value of each subarea;
and adjusting the current value in each partition to be the adjusted current value of each partition, wherein the sum of the adjusted current values of each partition is the preset total current threshold.
In one possible implementation manner of the first aspect, after obtaining the total current value of the display screen, the method further includes:
and when the total current value is less than or equal to the preset total current threshold value, removing the current limiting adjustment of each partition.
In a second aspect, an embodiment of the present application provides a display screen backlight brightness control apparatus, where the apparatus includes the following modules:
the current sampling module is used for acquiring a total current value of the backlight of the display screen, wherein the display screen is provided with one or more partitions, and the total current value is the sum of current values of all partitions in the backlight of the display screen;
the judging module is used for acquiring the current value of each subarea when the total current value is greater than a preset total current threshold value;
and the control module is used for carrying out current limiting adjustment on the current value of each subarea to ensure that the adjusted total current value is less than or equal to a preset total current threshold value.
In a third aspect, an embodiment of the present application provides a display screen, which includes an LED module, a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the display screen brightness control method according to any one of the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, where the computer program is implemented to implement the method according to any one of the first aspect when executed by a processor.
In a fifth aspect, the present application provides a computer program product, which when run on a display screen, causes the display screen to execute the display screen brightness control method according to any one of the above first aspects.
It is to be understood that, for the beneficial effects of the second aspect to the fifth aspect, reference may be made to the relevant description in the first aspect, and details are not described herein again.
Compared with the prior art, the embodiment of the application has the advantages that:
this application is controlled the luminance in a poor light of display screen, sets up the total current threshold value, the total current threshold value has a luminance that can let the comfortable correspondence of watching of people's eye, after the electric current changes, surpasses the total current threshold value, adjusts total current value extremely is less than or equal to the total current threshold value, when the luminance of display screen surpassed the luminance that can let the comfortable watching of people's eye promptly, will the luminance restriction of display screen is in can let the comfortable luminance of people's eye, and traditional display screen is for improving image picture contrast, does not carry out automatic control to the luminance of image picture when the image picture that the display screen shows is watched to people's eye, if the luminance of the image picture of the previous moment is not high or for large tracts of land black picture, and when the image picture of the later moment improves suddenly by a wide margin or for white picture, if luminance surpasses the luminance that can let the comfortable watching of people's eye this moment, can cause the harm to people's eye. The scheme provided by the application can limit the brightness of the image, so that the brightness of the image is always at the brightness which can be comfortably watched by human eyes, the human eyes are protected, and the power consumption of the display screen can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for controlling brightness of a display screen according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a current conversion method according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a display screen brightness control apparatus according to an embodiment of the present application;
fig. 4 is a schematic diagram of a connection structure of a current sampling circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display screen according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.
The embodiment of the application provides a display screen brightness control method and device, a display screen and a storage medium, which can realize brightness control of the display screen and solve the problem of brightness control of the display screen. The method is applied to scenes in which the brightness of the display screen is suddenly changed into a large-area white picture. According to the embodiment of the application, when the backlight brightness of the display screen is suddenly changed into a large-area white picture and the human eyes are possibly damaged, the improvement of the backlight brightness of the display screen is limited through the pre-stored total current threshold value, and the backlight brightness of the display screen can be only improved to the pre-stored total current threshold value at the highest.
Fig. 1 shows a flowchart of a display screen brightness control method provided in an embodiment of the present application, where an execution main body of the display screen backlight brightness control method may be a display screen, and the display screen backlight brightness control is performed by controlling the brightness of an LED lamp. The display screen backlight brightness control method comprises the following steps:
s101, acquiring the total current value of the display screen.
In the above steps, in a possible implementation manner, the brightness of the LED lamp in the display screen backlight is related to power, and the current of the LED lamp is controlled, that is, the brightness of the LED lamp is adjusted, under the condition that the external voltage supplied to the display screen and the built-in resistor of the LED lamp in the display screen are both fixed. The corresponding relation between the brightness and the current is obtained by debugging, the display screen can be debugged before the display screen leaves a factory, and the debugging method comprises the following steps: adjusting an LED lamp in a display screen to the maximum brightness, and reducing the maximum brightness according to the maximum brightness in percentage, for example, assuming that the maximum brightness is 100%, adjusting the brightness in the range of 60% -80% of the maximum brightness during debugging, and determining the current value of the display screen under different brightness.
In one possible implementation, the display screen may be of three different types.
For example, the display screen may adopt a sub-millimeter Light Emitting Diode (Mini · LED), and the backlight brightness of the display screen is controlled by controlling the LED lamp.
For example, the display screen may also adopt an Organic Light-Emitting Diode (abbreviated as OLED), which uses an Organic semiconductor material and a Light-Emitting material to emit Light by carrier injection and recombination under the driving of an electric field. Traditional liquid crystal display need use glass, and glass can lead to the fact certain absorption effect to light, and OLED need not to use glass, so compare in traditional liquid crystal display, OLED display screen can send out brighter light.
For example, the display screen may also adopt a Light-Emitting Diode (abbreviated as LED) for direct display, that is, an LED direct display screen, which is mostly used for large screen display of outdoor advertisements, and the size and the number of the LEDs are determined according to the size of the screen.
In a possible implementation manner, when the step of obtaining the total current value is performed, different total current values are obtained according to different types of display screens, for example, when a Mini-LED backlight liquid crystal display screen is adopted, the display screen has one or more partitions, each partition has one or more LED lamps, and the total current value adopted by the current sampling is the sum of the working current values of all the LED lamps of all the partitions in the display screen; when an OLED display screen or an LED direct display screen is adopted, the total power supply current value of the display screen is obtained by current sampling.
In a possible implementation manner, the process of obtaining the total current value of the display screen includes: sampling the total current in the display screen, converting the total current into an analog voltage signal, and then converting the analog voltage signal into a digital signal to obtain the total current value.
In a possible implementation manner, after the total current is converted into an analog voltage signal, the analog voltage signal is converted into digital data, and the digital data is the total current value. When the step of converting the analog voltage signal into the current value is performed, the analog voltage signal needs to be acquired, a required analog voltage signal needs to be acquired, and then the required analog voltage signal needs to be converted, and the step of the current conversion method is described with reference to fig. 2.
S102, judging whether the total current value is larger than a preset total current threshold value, if so, acquiring the current value of each subarea, jumping to S103, and if not, entering S104.
In the foregoing step, a possible implementation manner is that the total current threshold is set at the time of factory shipment and stored in a memory, and a user may modify the total current threshold. When the user modifies the total current threshold, according to the relationship between the brightness and the current, the corresponding brightness control value is obtained through the total current threshold, and the user adjusts the total current threshold by adjusting the brightness control value, where the brightness control value is expressed by a percentage of the maximum brightness, for example, if the maximum brightness is 100%, the user may set the brightness control value to 70%, and at this time, the total current threshold is adjusted to a current value corresponding to 70% of the maximum brightness.
And S103, carrying out current limiting adjustment on the current value of each subarea, so that the adjusted total current value is smaller than or equal to a preset total current threshold value.
In the foregoing step, one possible implementation manner is that, in the current limiting adjustment, the current of the LED lamp in each partition is adjusted through a register, and different adjustments are performed according to the type of the display screen in S102.
Illustratively, if the display screen is an OLED display screen or an LED direct display screen, the total supply current obtained by the display screen is adjusted to be reduced to the total current threshold, the brightness of the display screen is reduced, and the power consumption is reduced accordingly.
For example, if the display screen is a Mini · LED, the current value of each partition is adjusted in a current limiting manner, in a possible implementation manner, each partition has a same preset maximum partition current value, and the current value in each partition does not exceed the maximum partition current value, where the maximum partition current value is adjusted according to a change of a total current value in the display screen. When the total current value of the display screen is larger than the preset total current threshold value, the total current threshold value is averagely distributed according to the total number of the LED lamps in the subareas, the subarea average current threshold value is obtained, and the maximum subarea current value in each subarea is adjusted to be the subarea average current threshold value.
In a possible implementation manner, the current running current value in each partition is adjusted, and the running current value of each partition is adjusted according to the total current threshold and the product of the proportion of the current value of each partition in the total current value, wherein when the total current value of the display screen is greater than the total current threshold, the running current value of each partition is divided by the total current value to obtain the proportion of the running current value of each partition in the total current value, and the proportion is multiplied by the total current threshold to obtain an adjusted current value obtained by adjusting the running current value of each partition. And adjusting the running current value of each subarea to be the adjusted current value, wherein the sum of the current values of the subareas is the total current threshold value, so that the current limiting adjustment is carried out on each subarea.
For example, in a 27-inch 2304-area backlight liquid crystal display, each area has 1 LED lamp, and 2304 LED lamps in total, the maximum current of each LED lamp is 8 ma, when all the area LED lamps in the display are adjusted to the maximum brightness, the total current of the LED lamps is 18.432 a, the corresponding brightness value is 1200 nit, the brightness of the display may cause damage to human eyes, the total current threshold is set to 9.216 a, the corresponding brightness is 600 nit, and the brightness is appropriate, the current averaged to each LED lamp is 4 ma, when the total current is greater than 9.216 a, the maximum current of the LED lamps in all the area LED lamps in the display is adjusted to 4 ma, the operating current of the LED lamp with the current of 8 ma in the LED lamp is adjusted to 4 ma, and the operating current of the LED lamp with the current of 4 is adjusted to 2 ma, the brightness of the display is totally white and is therefore reduced, and cannot exceed 600 nit.
And S104, judging whether current limiting adjustment is performed or not.
In the above embodiment, one possible implementation manner is to directly return to S101 to obtain the current again when the current in the display screen is not subjected to the current limiting adjustment, and enter S105 when the current in the display screen is subjected to the current limiting adjustment.
In S105, the current limit adjustment is released, and the process proceeds to S101.
In the foregoing embodiment, a possible implementation manner is that, when a total current value is obtained, the total current value is smaller than the preset total current threshold and current-limiting adjustment has been performed at this time, the current-limiting adjustment is removed at this time, and S101 is returned to obtain current again, for example, when the display screen is an OLED display screen or an LED direct display screen, the total supply current is recovered.
Illustratively, in S103, when the display screen is a Mini-LED backlight lcd screen, the maximum current of the LED lamps in all the partitions in the display screen is restored to 8 ma through the register.
Fig. 2 shows a flowchart of a current conversion method provided in an embodiment of the present application, where the method includes the following steps:
s201, converting the acquired total current of the display screen into an analog voltage signal.
In the above step, one possible implementation manner is to convert the total current into a small voltage change through a current sampling resistor, amplify the voltage change through a differential amplifier, filter the voltage of the method through a filter capacitor, filter out an irrelevant signal, and output an analog voltage signal.
S202, acquiring the analog voltage signal within preset interval time.
In the above steps, one possible implementation manner is that the analog voltage signal is continuously changed within a preset interval time, the analog voltage signal within the interval time is obtained to perform conversion judgment, and a preset interval time is set.
And S203, converting the acquired analog voltage signal into a total current value.
In the foregoing step, a possible implementation manner is to convert the analog voltage signal into digital data, where the digital data corresponds to a total current value, and when performing brightness control, the digital data is obtained and compared with a preset total current threshold.
Fig. 3 shows a schematic structural diagram of a display screen backlight brightness control apparatus provided in an embodiment of the present application, where the apparatus includes a current sampling module 301, a determining module 302, and a control module 303. Wherein the content of the first and second substances,
the current sampling module 301 is configured to obtain a total current value of the display screen, where the display screen has one or more partitions when the display screen is a Mini · LED backlight liquid crystal display screen, the total current value is a sum of current values of the one or more partitions in the display screen, and the total current value is a total current of power supply of the display screen when the display screen is an OLED display screen or an LED direct display screen. One possible implementation manner of the current sampling module is that the current sampling module is implemented by a current sampling circuit, wherein a connection structure of the current sampling circuit is as shown in fig. 4, and the current sampling circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a differential amplifier U2, and a filter capacitor C1, R2= R3, R4= R5, and R1 is a current sampling resistor, and is configured to convert an obtained total current into an analog voltage signal, perform differential amplification through U2 with a differential amplification factor of R5/R2, filter the analog voltage signal after differential amplification by C1 and R6, and finally transmit the analog voltage signal after differential amplification to a control module to convert the analog voltage signal into a current value.
A judging module 302, configured to judge whether the total current value is greater than the total current threshold, where when the display screen leaves a factory, a recommended total current threshold may be stored in advance, and in a control module 303, the brightness of the display screen is controlled according to the total current threshold, and the user may modify a brightness control value corresponding to the total current threshold, and adjust the total current threshold to a suitable range.
A control module 303, configured to perform current-limiting adjustment on the current values of the partitions, so that the adjusted total current value is smaller than or equal to a preset total current threshold, and adjust the total current value in the display screen to be smaller than or equal to the total current threshold through a register, where a current brightness value of the display screen is correspondingly adjusted. The control module 303 obtains a preset total current threshold, obtains an analog electrical signal transmitted by the current sampling circuit, converts the analog voltage signal into digital data, where the digital data is a current value, and then compares the total current threshold with the total current value to adjust the brightness of the display screen, where the adjustment process is detailed in the methods in fig. 1, fig. 2, and fig. 3 in the embodiment of the present application, and is not described herein again.
Fig. 5 is a schematic structural diagram of a display screen according to an embodiment of the present application. As shown in fig. 5, the display screen 5 of this embodiment includes: at least one LED module 50, a processor 51 (only one processor is shown in fig. 5), a memory 52, and a computer program 53 stored in the memory 52 and executable on the at least one processor 51, wherein when the processor 51 executes the computer program 53, the brightness of the LED module 50 is controlled, and the steps in any of the above-mentioned display screen brightness control method embodiments are implemented.
The display screen 5 can be a Mini-LED liquid crystal display screen, an OLED display screen or an LED direct display screen. The display screen may include, but is not limited to, an LED module 50, a processor 51, and a memory 52. Those skilled in the art will appreciate that fig. 5 is merely an example of the display screen 5, and does not constitute a limitation of the display screen 5, and may include more or less components than those shown, or some of the components may be combined, or different components may be included, such as input and output devices, network access devices, and the like.
The LED module 50 may be composed of Light-Emitting diodes (Light-Emitting diodes for short), and the LED module 50 may also be composed of other Light-Emitting diodes, such as: a sub-millimeter Light Emitting Diode (abbreviated as Mini LED) or an Organic Light Emitting Diode (abbreviated as Organic Light-Emitting Diode).
The Processor 51 may be a Central Processing Unit (CPU), and the Processor 51 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA), a Micro Control Unit (MCU) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 52 may in some embodiments be an internal storage unit of the display 5, such as a hard disk or a memory of the display 5. The memory 52 may also be an external storage device of the display 5 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the display 5. Further, the memory 52 may also include both an internal storage unit of the display screen 5 and an external storage device. The memory 52 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer programs. The memory 52 may also be used to temporarily store data that has been output or is to be output.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the apparatus may be divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The embodiment of the present application further provides a display screen, and the display screen includes: at least one LED module, a processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps of any of the various method embodiments described above when executing the computer program.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the foregoing method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-drive, a removable hard drive, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may exist in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A display screen brightness control method is characterized by comprising the following steps:
acquiring a total current value of display screen backlight, wherein the display screen has one or more partitions, and the total current value is the sum of current values of all the partitions in the display screen backlight;
when the total current value is larger than a preset total current threshold value, acquiring the current value of each subarea;
and carrying out current limiting adjustment on the current value of each subarea to ensure that the adjusted total current value is less than or equal to a preset total current threshold value.
2. The method of claim 1, wherein the obtaining the total current value of the display screen backlight comprises:
converting the total current of the display screen backlight into an analog voltage signal, wherein the total current of the display screen backlight is the sum of the currents of all the partitions in the display screen backlight;
acquiring the analog voltage signal within a preset interval time;
and converting the obtained analog voltage signal into a total current value, wherein the total current value is digital data.
3. The method of claim 1, wherein each of said zones has a same predetermined maximum zone current value, wherein the current value in each of said zones does not exceed said maximum zone current value;
the maximum zone current value is adjusted along with the change of the total current value.
4. The method of claim 3, wherein the maximum zone current value is adjusted as a function of total current value, comprising:
when the total current value is larger than the preset total current threshold, averagely distributing the preset total current threshold according to the number of partitions to obtain partition average current thresholds, and adjusting the maximum partition current value in each partition to be the partition average current threshold;
and when the total current value is less than or equal to the preset total current threshold value, restoring the maximum subarea current value to a preset maximum subarea current value.
5. The method of claim 1, wherein current limiting the current values of the respective zones comprises:
and adjusting the current value of each subarea according to the product of the preset total current threshold value and the proportion of the current value in each subarea in the total current value.
6. The method of claim 5, wherein adjusting the current value for each zone based on the product of the predetermined total current threshold and the fraction of the total current value in each zone comprises:
acquiring the preset total current threshold;
dividing the current value in each partition by the total current value to obtain the proportion of the current value in each partition in the total current value;
multiplying the proportion by the preset total current threshold value to obtain a multiplication result which is the adjustment current value of each subarea;
and adjusting the current value in each partition to be the adjusted current value of each partition, wherein the sum of the adjusted current values of each partition is the preset total current threshold.
7. The method of claim 1, wherein after obtaining the total current value for the display screen, the method further comprises:
and when the total current value is less than or equal to the preset total current threshold value, removing the current limiting adjustment of each partition.
8. A display screen brightness control apparatus, comprising:
the current sampling module is used for acquiring a total current value of the backlight of the display screen, wherein the display screen is provided with one or more partitions, and the total current value is the sum of current values of all partitions in the backlight of the display screen;
the judging module is used for acquiring the current value of each subarea when the total current value is greater than a preset total current threshold value;
and the control module is used for carrying out current limiting adjustment on the current value of each subarea to ensure that the adjusted total current value is less than or equal to a preset total current threshold value.
9. A display screen comprising an LED module, a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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| CN202211458499.1A CN115762427A (en) | 2022-11-21 | 2022-11-21 | Display screen brightness control method and device, display screen and storage medium |
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| CN202211458499.1A CN115762427A (en) | 2022-11-21 | 2022-11-21 | Display screen brightness control method and device, display screen and storage medium |
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