CN115457905A - Adaptive dimming compensation method, device and system of LED display screen and electronic equipment - Google Patents
Adaptive dimming compensation method, device and system of LED display screen and electronic equipment Download PDFInfo
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- CN115457905A CN115457905A CN202211292192.9A CN202211292192A CN115457905A CN 115457905 A CN115457905 A CN 115457905A CN 202211292192 A CN202211292192 A CN 202211292192A CN 115457905 A CN115457905 A CN 115457905A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The application relates to a self-adaptive dimming compensation method, a self-adaptive dimming compensation device, a self-adaptive dimming compensation system and electronic equipment of an LED display screen, belonging to the field of the LED display screen, wherein the method is applied to the self-adaptive dimming compensation system of the LED display screen and is executed by the electronic equipment, and the method comprises the following steps: acquiring image information of a display screen based on an industrial camera at preset time intervals; acquiring an ambient light brightness value at preset time intervals; acquiring actual brightness values of all areas of the display screen based on the image information; inputting the environment light brightness data into a neural network model to obtain a preset brightness value of the display screen corresponding to the environment light brightness value; and comparing the actual brightness value of each region with the preset brightness value, and adjusting the brightness of the region according to the comparison result to enable the region to reach the preset brightness value. This application makes the luminance adaptation ambient light of LED display screen, improves the display effect of LED display screen.
Description
Technical Field
The present application relates to the field of LED display screen technologies, and in particular, to a method, an apparatus, a system, and an electronic device for adaptive dimming compensation of an LED display screen.
Background
An LED display screen is an imaging electronic device made of light emitting diodes arranged in sequence, and is widely used in products such as advertisement screens due to its bright brightness, wide visibility, and long life.
When the LED display screen is used, due to the influence of light rays at the position, the brightness of the LED display screen cannot achieve the expected effect, and if the light rays are bright and the brightness of the LED display screen is dark, the display picture of the LED display screen is difficult to view; if the light is darker and the brightness of the LED display screen is brighter, the LED display screen is in a high-current working state and is easily overheated.
Disclosure of Invention
In order to adapt the brightness of the LED display screen to ambient light and improve the display effect of the LED display screen, the application provides an adaptive dimming compensation method, an adaptive dimming compensation device, an adaptive dimming compensation system and electronic equipment of the LED display screen.
In a first aspect, the present application provides a method for adaptive dimming compensation of an LED display screen, which adopts the following technical scheme: an adaptive dimming compensation system applied to an LED display screen, executed by an electronic device, the method comprising:
acquiring image information of a display screen based on an industrial camera at intervals of preset time;
acquiring an ambient light brightness value at preset time intervals;
acquiring actual brightness values of all areas of the display screen based on the image information;
inputting the environment light brightness data into a neural network model to obtain a preset brightness value of the display screen corresponding to the environment light brightness value;
comparing the actual brightness value of each region with the preset brightness value, and adjusting the brightness of the region according to the comparison result, wherein the method comprises any one of the following steps:
when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value;
when the actual brightness value of the area is greater than the preset brightness value, enabling a supplementary lighting driving circuit corresponding to the area to drive and reduce the current of a supplementary lighting light source, and if the area is still greater than the preset brightness value after the supplementary lighting light source is turned off, enabling a light emitting driving circuit corresponding to the area to reduce the current for driving the light emitting light source, so that the area reaches the preset brightness value;
when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, enabling the light supplement driving circuit corresponding to the area to increase the current for driving the light emitting source, and enabling the area to reach a preset brightness value.
By adopting the technical scheme, the electronic equipment acquires the image information of the display screen at preset intervals, and obtains the actual brightness value of each region of the LED display screen according to the image information, the electronic equipment acquires the ambient brightness value at preset intervals simultaneously, and further obtains the preset brightness value corresponding to the ambient brightness value according to the neural network model, the electronic equipment compares the actual brightness value of each region with the preset brightness value, and respectively adjusts the brightness of each region according to the comparison result, under the condition that the luminous capacity of each region is different, the brightness value of the LED display screen is adaptive to the ambient brightness value by more finely adjusting the luminous light source and the light supplement light source, and the brightness of the LED display screen is more uniform, so that the LED display screen is more intelligently adaptive to the ambient light, and the display effect is better.
In another possible implementation manner, the method further includes:
composing a first region based on a plurality of neighboring regions;
determining an actual luminance value of a first region based on actual luminance values of the respective regions within the first region;
determining a first preset brightness uniformity value and a second preset brightness uniformity value of the display screen based on the size of each first area, wherein the first preset brightness uniformity value is smaller than the second preset brightness uniformity value;
evaluating an actual brightness uniformity value of the display screen based on the actual brightness value of each first area;
if the actual brightness uniformity value is larger than a first preset brightness uniformity value and smaller than or equal to a second preset brightness uniformity value, adjusting the brightness of each first area to enable the brightness uniformity value of the display screen to reach a first preset uniformity;
and if the first brightness uniformity value is larger than a second preset brightness uniformity value, adjusting the brightness of each area to enable the brightness uniformity value of the display screen to reach the first preset brightness uniformity value.
By adopting the technical scheme, after the brightness of the display screen is adapted to the ambient light, the brightness uniformity of the display screen needs to be monitored due to different light attenuation degrees of the light-emitting light sources, and the brightness of each area is adjusted in time, so that the brightness of the display screen is uniform, the electronic equipment firstly divides the first area, the brightness uniformity of the first area is compared with the first preset brightness uniformity and the second preset brightness uniformity, two-stage adjustment is realized, and the brightness uniformity of the LED display screen is adjusted according to different uniformity degrees.
Further, the forming the first region based on the plurality of adjacent regions includes:
determining a first number of regions of the display screen in a length direction and a second number of regions in a width direction;
respectively presetting unit numbers of the first area in the length direction and the width direction;
dividing the display screen to obtain a plurality of first areas based on the unit number along the length direction and the width direction respectively from one corner of the display screen;
when the number of remaining areas in the length direction or the width direction of the display screen is less than the unit number, the remaining areas are divided into first areas.
By adopting the technical scheme, the electronic equipment divides the display screen into the plurality of first areas according to the size of the display screen and the unit number of each first area, so that the brightness uniformity value of the LED display screen can be calculated roughly.
Further, determining a first preset brightness uniformity value and a second preset brightness uniformity value of the display screen based on the size of each first area comprises:
establishing a display screen brightness database, wherein the display screen brightness database comprises brightness values of all areas of a plurality of experimental display screens with uniform illuminance;
presetting a plurality of unit quantities, and determining a scheme that the experimental display screen is divided into a plurality of first areas based on each unit quantity;
determining a first brightness uniformity value of each experimental display screen based on the brightness value of each area of each experimental display screen, and determining a first preset brightness uniformity value based on the first brightness uniformity value of each experimental display screen;
and determining a second brightness uniformity value of each experimental display screen based on the brightness value of each first area of each experimental display screen, and determining a second preset brightness uniformity value corresponding to the scheme of the first area based on the second brightness uniformity value of each experimental display screen.
By adopting the technical scheme, when the electronic equipment sets the first preset brightness uniform value and the second preset brightness uniform value according to the size of the first area, the database of the test display screen is called, the related data of the display screen with uniform brightness is summarized more truly, and the current LED display screen is convenient to adjust more accurately.
Further, the evaluating the actual brightness uniformity value of the display screen based on the actual brightness value of each of the first areas includes:
determining a brightness average value based on the actual brightness value of each first area;
calculating a variance value of the display screen based on the actual brightness value of each first area and the brightness average value;
and determining an actual brightness uniformity value based on the variance value.
By adopting the technical scheme, the larger the variance of the LED display screen is, the non-uniform brightness of the LED display screen is, and the brightness uniformity of the display screen is reflected by calculating the variance.
Further, the method further comprises:
determining a first brightness average value based on each actual brightness value of each area at each moment;
respectively determining the difference value between the actual brightness value of each area at each moment and the corresponding first brightness average value;
determining a variance for each of the regions based on the plurality of difference values for each region;
and when the variance is larger than a preset value, sending alarm information.
By adopting the technical scheme, the electronic equipment obtains a plurality of difference values corresponding to a plurality of moments in each area by calculating the difference value between the actual brightness value of each area at each moment and the average value of the first brightness, and further calculates the variance of each area, when the variance of any area is larger, the current area is unstable or even abnormal in operation, an alarm is given, and the intelligent monitoring of the operation state of the LED display screen is facilitated.
In a second aspect, an embodiment of the present application provides an adaptive dimming compensation apparatus for an LED display screen, which adopts the following technical scheme:
the adaptive dimming compensation device of the LED display screen comprises:
the image information acquisition module is used for acquiring the image information of the display screen at preset time intervals;
the environment light brightness value acquisition module is used for acquiring environment light brightness values at preset time intervals;
the actual brightness value acquisition module is used for acquiring actual brightness values of all areas of the display screen based on the image information;
the preset brightness value determining module is used for inputting the environment light brightness data into the neural network model to obtain a preset brightness value of the display screen corresponding to the environment light brightness value;
the adjusting module is used for comparing the actual brightness value of each region with the preset brightness value and adjusting the brightness of the region according to the comparison result, and comprises any one of the following steps:
when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value;
when the actual brightness value of the area is greater than the preset brightness value, enabling a supplementary lighting driving circuit corresponding to the area to drive and reduce the current of a supplementary lighting light source, and if the area is still greater than the preset brightness value after the supplementary lighting light source is turned off, enabling a light emitting driving circuit corresponding to the area to reduce the current for driving the light emitting light source, so that the area reaches the preset brightness value;
when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, enabling the light supplement driving circuit corresponding to the area to increase the current for driving the light-emitting light source, and enabling the area to reach a preset brightness value.
By adopting the technical scheme, the image information of the display screen is acquired by the image information acquisition module at preset time intervals, the actual brightness value of each region of the LED display screen is acquired by the preset brightness value determination module according to the image information, the ambient light brightness value is acquired by the ambient light brightness value acquisition module at preset time intervals, the preset brightness value corresponding to the ambient light brightness value is acquired by the preset brightness value determination module according to the neural network model, the actual brightness value of each region is compared with the preset brightness value by the adjustment module, the brightness of each region is respectively adjusted according to the comparison result, under the condition that the luminous capacities of the regions are different, the brightness value of the LED display screen is adaptive to the ambient brightness value by adjusting the luminous light source and the light supplement light source more finely, the brightness of the LED display screen is more uniform, the LED display screen is adaptive to the ambient light more intelligently, and the display effect is better.
In a third aspect, an embodiment of the present application provides an adaptive dimming compensation system for an LED display screen, which adopts the following technical scheme:
the adaptive dimming compensation system of the LED display screen comprises:
the LED display screen comprises a plurality of areas, wherein each area is internally provided with a light-emitting module, each light-emitting module comprises a light-emitting drive circuit and a light-emitting light source, and the light-emitting drive circuit is connected with the light-emitting light source; each light supplement module comprises a light supplement driving circuit and a light supplement light source, and the light supplement driving circuit is connected with the light supplement power supply; the controller is respectively connected with each light-emitting driving circuit and each light-supplementing driving circuit; the environment light brightness sensor is used for detecting the environment light brightness and sending the environment light brightness data to the electronic equipment;
the industrial camera is used for shooting the LED display screen and sending shot image information to the electronic equipment;
an electronic device, coupled to the controller, the ambient light level sensor, and the industrial camera, that performs the method of any of the first aspects.
By adopting the technical scheme, the electronic equipment monitors the brightness of the LED display screen through the image information acquired by the industrial camera, acquires the ambient light brightness value through the ambient light brightness sensor, executes the method of any one of the first aspect, and realizes that the brightness value of the LED display screen is adaptive to the ambient brightness value by more finely adjusting the light-emitting light source and the light-supplementing light source under the condition that the luminous capacities of all the regions are different, so that the brightness of the LED display screen is more uniform, the LED display screen is more intelligently adaptive to the ambient light, and the display effect is better.
In a fourth aspect, the present application provides an electronic device, which adopts the following technical solutions:
an electronic device, comprising:
at least one processor;
a memory;
at least one application, wherein the at least one application is stored in the memory and configured to be executed by the at least one processor, the at least one application configured to: performing the method of any one of the first aspect.
By adopting the technical scheme, the processor executes the application program in the processor, the image information of the display screen is obtained at preset intervals, the actual brightness value of each area of the LED display screen is obtained according to the image information, the ambient light brightness value is obtained at preset intervals, the preset brightness value corresponding to the ambient light brightness value is further obtained according to the neural network model, the actual brightness value and the preset brightness value of each area are compared, the brightness of each area is respectively adjusted according to the comparison result, under the condition that the luminous capacity of each area is different, the brightness value of the LED display screen is adaptive to the ambient brightness value by more finely adjusting the light source and the light supplement source, the brightness of the LED display screen is more uniform, the LED display screen is more intelligently adaptive to the ambient light, and the display effect is better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the electronic equipment acquires image information of the display screen at preset intervals, actual brightness values of all areas of the LED display screen are acquired according to the image information, the electronic equipment acquires environment brightness values at preset intervals, preset brightness values corresponding to the environment brightness values are acquired according to the neural network model, the electronic equipment compares the actual brightness values with the preset brightness values of all the areas, and the brightness of all the areas is adjusted according to comparison results, so that the brightness values of the LED display screen are adaptive to the environment brightness values, the brightness of the LED display screen is more uniform, the LED display screen is more intelligently adaptive to the environment light, and the display effect is better.
2. The electronic equipment firstly divides a first area, compares a brightness uniformity value of the first area with a first preset brightness uniformity value and a second preset brightness uniformity value, realizes two-stage adjustment, and adjusts the brightness uniformity of the LED display screen according to different uniformity degrees.
Drawings
Fig. 1 is a schematic structural diagram of an adaptive dimming compensation system of an LED display screen in an embodiment of the present application.
Fig. 2 is a schematic flow chart of steps S101 to S105 in the embodiment of the present application.
Fig. 3 is a block diagram of an adaptive dimming compensation apparatus of an LED display screen in an embodiment of the present application.
Fig. 4 is a block diagram of an electronic device in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.
Referring to fig. 1, the adaptive dimming compensation system 300 of the LED display screen includes an LED display screen, an ambient light sensor, an industrial camera for shooting the LED display screen, and an electronic device 400 connected to the LED display screen, the ambient light sensor, and the industrial camera, respectively.
The LED display screen comprises a plurality of areas, wherein each area is internally provided with a light-emitting module, each light-emitting module comprises a light-emitting drive circuit and a light-emitting light source, the light-emitting drive circuit supplies power to the light-emitting light sources, and when the light-emitting drive circuit changes input current, the brightness of the light-emitting light sources changes.
Be provided with the light filling module in every region, the light filling module includes light filling drive circuit and light filling light source, and the light filling light source is the lighting apparatus the same with LED display screen power specification, paster mode and illumination colour, evenly alternates to install in the LED display screen in every region.
The light-emitting module and the light-supplementing module are connected with the controller, the controller is connected with the light-emitting driving circuit and the light-supplementing driving circuit (only 1 group of light-emitting module and light-supplementing light source are shown in fig. 1), the controller is connected with the electronic device 400, and the electronic device 400 can send instructions to the controller to enable the controller to control the light-emitting module and the light-supplementing module to adjust light.
The LED display screen further comprises a power supply module, and the power supply module supplies power to each module and the controller of the LED display screen.
The ambient light sensor is disposed around the LED display screen, and is configured to detect ambient light brightness data of the LED display screen, and send the ambient light brightness data to the electronic device 400.
The industrial camera photographs the LED display screen and transmits the photographed image information to the electronic device 400.
The embodiment of the application discloses an adaptive dimming compensation method of an LED display screen, which is applied to an adaptive dimming compensation system of the LED display screen, is executed by electronic equipment, and comprises the following steps (step S101-step S105):
step S101: and acquiring image information of the display screen at preset time intervals.
Specifically, the electronic device and an industrial camera shooting the display screen can acquire image information of the display screen, and the electronic device adjusts the brightness of the LED display screen once every preset time, so that the brightness of the LED display screen can be changed according to light changes at any time.
Step S102: and acquiring the ambient light brightness value at preset time intervals.
Specifically, the electronic device is connected to the ambient light brightness sensor, and processes the brightness data sent by the ambient light brightness sensor, so that the electronic device obtains an ambient light brightness value.
Step S103: and acquiring actual brightness values of all areas of the display screen based on the image information.
Specifically, after acquiring image information shot by an industrial camera, the electronic device processes the image information according to existing image analysis software, and then obtains actual brightness values of each region. For example, the electronic device obtains the actual luminance data of the area a as 300cd/m 2 。
Since the light attenuation of each light-emitting source is different, the brightness values of the light-emitting sources may be slightly different when the same magnitude of current is applied. Therefore, the electronic equipment respectively obtains the actual brightness value of each area, and the adjustment precision is improved.
Step S104: and inputting the ambient light brightness data into the neural network model to obtain a preset brightness value of the display screen corresponding to the ambient light brightness value.
Specifically, the electronic device trains to obtain a neural network model according to a plurality of ambient light brightness data and corresponding preset brightness value samples of the display screen. And the electronic equipment obtains a preset brightness value according to the detected ambient light brightness and the neural network model.
Step S105: comparing the actual brightness value of each region with a preset brightness value, and adjusting the brightness of the region according to the comparison result, wherein the brightness includes any one of the following:
a: when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value.
b: when the actual brightness value of the area is greater than the preset brightness value, the light supplement driving circuit corresponding to the area drives and reduces the current of the light supplement light source, and if the area is still greater than the preset brightness value after the light supplement light source is turned off, the light emitting driving circuit corresponding to the area reduces the current for driving the light emitting light source, so that the area reaches the preset brightness value.
Specifically, the actual brightness value of the current region is higher than the preset brightness value and needs to be dimmed, so that the brightness of the light supplement light source is firstly reduced, and the electronic device can calculate the current required to be provided by the light supplement driving circuit according to the difference between the actual brightness value of the region and the preset brightness value, thereby reducing the brightness of the light supplement light source. When the light supplementing light source is turned off, the actual brightness value of the area is still larger than the preset brightness value, the electronic equipment continues to calculate the difference value between the actual brightness value and the preset brightness value after the light supplementing light source is adjusted, the current required to be provided by the light emitting driving circuit is obtained according to the difference value, and then the light emitting driving circuit of the area reduces the current for driving the light emitting light source, so that the area reaches the preset brightness value.
c: when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, the light supplement driving circuit corresponding to the area increases the current for driving the light emitting source, so that the area reaches a preset brightness value.
Specifically, when the brightness value needs to be adjusted, the electronic device first makes the light-emitting driving circuit increase the current for driving the light-emitting light source, so that the LED realizes self-adjustment, each light-emitting power source has a maximum driving current value, and when the driving current value reaches the maximum current value, the light-supplementing driving circuit needs to be adopted to increase the brightness value.
Therefore, the electronic equipment respectively adjusts each area to achieve a preset brightness value, and brightness of the LED display screen is uniform.
In another possible implementation manner, after the brightness of the display screen is adapted to the ambient light, due to different light attenuations of the light sources, the brightness of each region may slightly change between two adjacent adjustments of the display screen, and it is necessary to monitor a brightness uniformity value of the display screen and adjust the brightness of each region in time to make the brightness of the display screen uniform, where the method further includes (step S11 to step S16):
step S11: the first region is composed based on a plurality of adjacent regions, including (step S111 to step 114):
step S111: a first number of regions of the display screen in a length direction and a second number of regions in a width direction are determined.
Step S112: the unit number of the first region in the length direction and the width direction is preset respectively.
Specifically, the unit number of the regions in the length direction of the first region and the unit number of the regions in the width direction of the first region may be equal, that is, the first region is a square, or may not be equal, but in order to improve the accuracy of the luminance evaluation of the first region, the difference between the unit number of the regions in the length direction and the unit number of the regions in the width direction of the first region is not large. For example, the electronic device may preset the unit number of the regions of the first region in both the length direction and the width direction to be k.
Step S113: the display screen is divided into a plurality of first areas based on unit quantity from one corner of the display screen along the length direction and the width direction respectively.
For example, the display screen comprises m × n areas, from the lower left corner of the display screen, m/k (+ 1) columns of first areas are divided along the length direction, n/k (+ 1) rows of first areas are divided along the width direction, and m/k (+ 1) × n/k (+ 1) first areas are further obtained.
Step S114: when the number of remaining areas in the length direction or the width direction of the display screen is less than the unit number, the remaining areas are divided into first areas.
For example, when k =10, the number of remaining regions in the length direction is 6, and the number of remaining regions in the width direction is 3, the remaining regions are divided into first regions in one column and one row.
Step S12: an actual luminance value of the first region is determined based on the actual luminance values of the respective regions within the first region.
Specifically, the electronic device calculates an average value of actual luminance values of the respective areas in the first area, and the average value is the actual luminance value of the first area.
Step S13: and determining a first preset brightness uniform value and a second preset brightness uniform value of the display screen based on the size of each first area, wherein the first preset brightness uniform value is smaller than the second preset brightness uniform value. Comprising (step S131 to step S134): step S131: and establishing a display screen brightness database, wherein the display screen brightness database comprises brightness values of all areas of a plurality of experimental display screens with uniform illumination.
Specifically, the electronic device may determine the requirement of the current display screen for uniform illuminance according to the luminance value data of the test display screen with uniform illuminance, so as to more accurately determine the first preset luminance uniform value and the second preset luminance uniform value.
Step S132: a plurality of unit quantities are preset, and a scheme that the experimental display screen is divided into a plurality of first areas based on each unit quantity is determined.
Specifically, when the electronic device establishes the display screen brightness database, a plurality of unit quantities are determined, and examples of the illumination uniformity when the display screen is divided into a plurality of first areas are established respectively for each unit quantity.
Step S133: and determining a first brightness uniformity value of each experimental display screen based on the brightness value of each region of each experimental display screen, and determining a first preset brightness uniformity value based on the first brightness uniformity value of each experimental display screen.
Specifically, the electronic device calculates a mean value through the brightness values of the regions of each experimental display screen, calculates a variance of the brightness values of the experimental display screens according to the brightness values of the regions and the mean value, and determines the calculated variance as a first brightness uniformity value.
The electronic equipment obtains a first preset brightness uniformity value by calculating the mean value of the first brightness uniformity values of the experimental display screens. Therefore, the first preset brightness uniformity value more accurately represents the brightness uniformity degree of the display screen.
Step S134: and determining a second brightness uniformity value of each experimental display screen based on the brightness value of each first area of each experimental display screen, and determining a second preset brightness uniformity value corresponding to the scheme of the first area based on the second brightness uniformity value of each experimental display screen.
Specifically, the electronic device calculates a mean value through the luminance values of the first regions of each experimental display screen, calculates a variance of the luminance values of the experimental display screens according to the luminance values of the first regions and the mean value, and determines the calculated variance as a second luminance uniformity value.
The electronic equipment obtains a second preset brightness uniformity value by calculating the mean value of the second brightness uniformity values of the experimental display screens.
Step S14: and evaluating the actual brightness uniformity value of the display screen based on the actual brightness value of each first area.
Specifically, the electronic device determines a luminance average value based on actual luminance values of the respective first regions; calculating a variance value of the display screen based on the actual brightness value and the brightness average value of each first area; an actual luminance uniformity value is determined based on the variance value.
Step S15: if the actual brightness uniformity value is larger than the first preset brightness uniformity value and smaller than or equal to the second preset brightness uniformity value, the brightness of each first area is adjusted to enable the brightness uniformity value of the display screen to reach the first preset uniformity value.
Specifically, the precision of a first preset brightness uniformity value calculated according to the region is lower than the precision of a second preset brightness uniformity value calculated according to the first region, and when the preset brightness uniformity value is smaller than or equal to the second preset brightness uniformity value, the uniformity of the display screen is within a normal range, and the brightness adaptability of the first region is correspondingly adjusted.
When the electronic device adjusts the brightness of each first area, the average brightness value of each first area is calculated first, and then the difference value between the brightness of each first area and the average brightness value is calculated respectively.
And when the difference value is greater than zero, the light supplement driving circuit corresponding to the first area drives to reduce the current of the light supplement light source, and if the first area is still greater than the average brightness value after the light supplement light source is turned off, the light emitting driving circuit corresponding to the first area reduces the current for driving the light emitting light source, so that the first area reaches the average brightness value.
When the difference value is less than zero, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the first area is less than the maximum current value, the current is increased; otherwise, the light supplement driving circuit corresponding to the first area increases the current for driving the light emitting source, so that the first area reaches the average brightness value.
Step S16: and if the actual brightness uniformity value is larger than the second preset brightness uniformity value, adjusting the brightness of each area to enable the brightness uniformity value of the display screen to reach the first preset brightness uniformity value.
Specifically, if the actual brightness uniformity value of the display screen is greater than the second preset brightness uniformity value, the brightness of the display screen is not uniform, and then the brightness of each area is correspondingly adjusted, so that the brightness of the display screen is adjusted more accurately.
When the electronic device adjusts the brightness of each region, the average brightness value of each region is calculated, and then the difference value between the brightness of each region and the average brightness value is calculated respectively.
And when the difference value is greater than zero, the light supplement driving circuit corresponding to the area drives to reduce the current of the light supplement light source, and if the area is still greater than the average brightness value after the light supplement light source is turned off, the light emitting driving circuit corresponding to the area reduces the current for driving the light emitting light source, so that the area reaches the average brightness value.
When the difference value is less than zero, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the region is less than the maximum current value, the current is increased; otherwise, the light supplement driving circuit corresponding to the area increases the current for driving the light emitting source, so that the area reaches the average brightness value.
In another possible implementation manner, in order to monitor whether the light emission of each region is normal, the method further includes: determining a first brightness average value based on the actual brightness value of each area at each moment; respectively determining the difference value between the actual brightness value of each area at each moment and the corresponding first brightness average value; determining a variance of each region based on the difference of each region at the respective time; and when the variance is larger than a preset value, sending alarm information.
Specifically, the electronic device calculates a first brightness average value at each time, further calculates a difference value of each region at each time, and if the difference value is larger, the deviation between the brightness of the corresponding region and the normal brightness is larger. And after the variance of each region is calculated according to the difference of each moment, whether the corresponding region emits light normally can be judged according to the variance.
When the variance is large, the brightness change of the corresponding area is irregular, and frequent flicker may occur, so that alarm information needs to be sent out to prompt that maintenance is needed.
In order to better perform the above method, an embodiment of the present application further provides an adaptive dimming compensation apparatus for an LED display panel, and referring to fig. 3, an adaptive dimming compensation apparatus 200 for an LED display panel includes:
an image information obtaining module 201, configured to obtain image information of a display screen at preset time intervals;
an ambient light brightness value obtaining module 202, configured to obtain an ambient light brightness value every preset time;
an actual brightness value obtaining module 203, configured to obtain an actual brightness value of each area of the display screen based on the image information;
the preset brightness value determining module 204 is configured to input the ambient light brightness data into the neural network model to obtain a preset brightness value of the display screen corresponding to the ambient light brightness value;
the adjusting module is used for comparing the actual brightness value of each region with a preset brightness value and adjusting the brightness of the region according to the comparison result, and comprises any one of the following steps:
when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value;
when the actual brightness value of the area is greater than the preset brightness value, enabling the light supplement driving circuit corresponding to the area to drive and reduce the current of the light supplement light source, and if the area is still greater than the preset brightness value after the light supplement light source is turned off, enabling the light emitting driving circuit corresponding to the area to reduce the current for driving the light emitting light source, so that the area reaches the preset brightness value;
when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, the light supplement driving circuit corresponding to the area increases the current for driving the light emitting source, so that the area reaches a preset brightness value.
In another possible implementation manner, the apparatus 200 for adaptive dimming compensation of an LED display screen further includes:
a first region determining module for forming a first region based on a plurality of adjacent regions;
the first area actual brightness value determining module is used for determining the actual brightness value of the first area based on the actual brightness value of each area in the first area;
the device comprises a preset brightness uniformity value determining module, a first brightness uniformity value determining module and a second brightness uniformity value determining module, wherein the preset brightness uniformity value determining module is used for determining a first preset brightness uniformity value and a second preset brightness uniformity value of the display screen based on the size of each first area, and the first preset brightness uniformity value is smaller than the second preset brightness uniformity value;
the actual brightness uniformity value determining module is used for evaluating the actual brightness uniformity value of the display screen based on the actual brightness value of each first area;
the first adjusting module is used for adjusting the brightness of each first area when the actual brightness uniformity value is larger than a first preset brightness uniformity value and is smaller than or equal to a second preset brightness uniformity value, so that the brightness uniformity value of the display screen reaches a first preset uniformity degree;
and the second adjusting module is used for adjusting the brightness of each area when the first brightness uniformity value is greater than a second preset brightness uniformity value, so that the brightness uniformity value of the display screen reaches the first preset brightness uniformity value.
Further, the first region determining module is specifically configured to:
determining a first number of regions of the display screen in a length direction and a second number of regions in a width direction;
respectively presetting unit numbers of the first area in the length direction and the width direction;
dividing the display screen to obtain a plurality of first areas based on unit quantity from one corner of the display screen along the length direction and the width direction respectively;
when the number of remaining areas in the length direction or the width direction of the display screen is less than the unit number, the remaining areas are divided into first areas.
Further, the preset luminance uniformity value determining module is specifically configured to:
establishing a display screen brightness database, wherein the display screen brightness database comprises brightness values of all areas of a plurality of experimental display screens with uniform illuminance;
presetting a plurality of unit quantities, and determining a scheme that the experimental display screen is divided into a plurality of first areas based on each unit quantity;
determining a first brightness uniformity value of each experimental display screen based on the brightness value of each region of each experimental display screen, and determining a first preset brightness uniformity value based on the first brightness uniformity value of each experimental display screen;
and determining a second brightness uniformity value of each experimental display screen based on the brightness value of each first area of each experimental display screen, and determining a second preset brightness uniformity value corresponding to the scheme of the first area based on the second brightness uniformity value of each experimental display screen.
Further, the actual luminance uniformity value determining module is specifically configured to:
determining a brightness average value based on the actual brightness values of the respective first regions;
calculating a variance value of the display screen based on the actual brightness value and the brightness average value of each first area;
and determining an actual brightness uniformity value based on the ratio of the variance value to the standard value.
In another possible implementation manner, the apparatus 200 for adaptive dimming compensation of an LED display screen further includes:
a first luminance average value determining module for determining a first luminance average value based on each actual luminance value of each region at each time;
the difference value determining module is used for respectively determining the difference value between the actual brightness value of each area at each moment and the corresponding first brightness average value;
a variance determining module for determining a variance of each region based on the plurality of difference values for each region;
and the alarm information determining module is used for sending out alarm information when the variance is greater than a preset value.
Various changes and specific examples in the method in the foregoing embodiment are also applicable to the adaptive dimming compensation apparatus for an LED display panel in this embodiment, and a person skilled in the art can clearly know the implementation method of the adaptive dimming compensation apparatus for an LED display panel in this embodiment through the foregoing detailed description of the adaptive dimming compensation method for an LED display panel, so for the brevity of the description, detailed description is not repeated here.
In order to better implement the above method, an embodiment of the present application provides an electronic device, and referring to fig. 4, the electronic device 400 includes: a communication control board 401 and a memory 403. Wherein the memory 403 is connected to the communication control board 401, such as via a bus 402. Optionally, the electronic device 400 may also include a transceiver 404. It should be noted that the transceiver 404 is not limited to one in practical applications, and the structure of the electronic device 400 is not limited to the embodiment of the present application.
The communication control board 401 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The communications board 401 may also be a combination of components that performs computing functions, including for example, one or more microprocessors, DSPs, and microprocessors, among others.
The Memory 403 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.
The memory 403 is used for storing application program codes for executing the scheme of the application, and the execution is controlled by the communication control board 401. The communications controller board 401 is configured to execute application code stored in the memory 403 to implement the content shown in the foregoing method embodiments.
The electronic device 400 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
In addition, it is to be understood that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (9)
1. An adaptive dimming compensation method of an LED display screen is characterized in that an adaptive dimming compensation system applied to the LED display screen is executed by electronic equipment, and the method comprises the following steps:
acquiring image information of a display screen based on an industrial camera at preset time intervals;
acquiring an ambient light brightness value at preset time intervals;
acquiring actual brightness values of all areas of the display screen based on the image information;
inputting the environment light brightness data into a neural network model to obtain a preset brightness value of the display screen corresponding to the environment light brightness value;
comparing the actual brightness value of each region with the preset brightness value, and adjusting the brightness of the region according to the comparison result, wherein the method comprises any one of the following steps:
when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value;
when the actual brightness value of the area is greater than the preset brightness value, enabling a supplementary lighting driving circuit corresponding to the area to drive and reduce the current of a supplementary lighting light source, and if the area is still greater than the preset brightness value after the supplementary lighting light source is turned off, enabling a light emitting driving circuit corresponding to the area to reduce the current for driving the light emitting light source, so that the area reaches the preset brightness value;
when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, enabling the light supplement driving circuit corresponding to the area to increase the current for driving the light emitting source, and enabling the area to reach a preset brightness value.
2. The method of claim 1, further comprising:
forming a first region based on a plurality of adjacent regions;
determining an actual luminance value of the first region based on the actual luminance values of the respective regions within the first region;
determining a first preset brightness uniformity value and a second preset brightness uniformity value of the display screen based on the size of each first area, wherein the first preset brightness uniformity value is smaller than the second preset brightness uniformity value;
evaluating an actual brightness uniformity value of the display screen based on the actual brightness value of each first area;
if the actual brightness uniformity value is larger than a first preset brightness uniformity value and smaller than or equal to a second preset brightness uniformity value, adjusting the brightness of each first area to enable the brightness uniformity value of the display screen to reach a first preset uniformity;
and if the first brightness uniformity value is larger than a second preset brightness uniformity value, adjusting the brightness of each area to enable the brightness uniformity value of the display screen to reach the first preset brightness uniformity value.
3. The method of claim 2, wherein the forming the first region based on the plurality of neighboring regions comprises:
determining a first number of regions of the display screen in a length direction and a second number of regions in a width direction;
respectively presetting unit numbers of the first area in the length direction and the width direction;
dividing the display screen to obtain a plurality of first areas based on the unit number along the length direction and the width direction respectively from one corner of the display screen;
when the number of remaining areas in the length direction or the width direction of the display screen is less than the unit number, the remaining areas are divided into first areas.
4. The method of claim 2, wherein determining a first preset luminance uniformity value and a second preset luminance uniformity value of the display screen based on the size of each of the first regions comprises:
establishing a display screen brightness database, wherein the display screen brightness database comprises brightness values of all areas of a plurality of experimental display screens with uniform illuminance;
presetting a plurality of unit quantities, and determining a scheme that the experimental display screen is divided into a plurality of first areas based on each unit quantity;
determining a first brightness uniformity value of each experimental display screen based on the brightness value of each region of each experimental display screen, and determining a first preset brightness uniformity value based on the first brightness uniformity value of each experimental display screen;
and determining a second brightness uniformity value of each experimental display screen based on the brightness value of each first area of each experimental display screen, and determining a second preset brightness uniformity value corresponding to the scheme of the first area based on the second brightness uniformity value of each experimental display screen.
5. The method of claim 2, wherein: the evaluating the actual brightness uniformity value of the display screen based on the actual brightness value of each first area comprises:
determining a brightness average value based on the actual brightness value of each first area;
calculating a variance value of the display screen based on the actual brightness value of each first area and the brightness average value;
and determining an actual brightness uniformity value based on the variance value.
6. The method of claim 1, further comprising:
determining a first brightness average value based on each actual brightness value of each area at each moment;
respectively determining the difference value between the actual brightness value of each area at each moment and the corresponding first brightness average value;
determining a variance for each of the regions based on the plurality of difference values for each region;
and when the variance is larger than a preset value, sending alarm information.
7. An adaptive dimming compensation device of an LED display screen is characterized by comprising:
the image information acquisition module is used for acquiring the image information of the display screen at preset time intervals;
the environment light brightness value acquisition module is used for acquiring environment light brightness values at preset time intervals;
the actual brightness value acquisition module is used for acquiring actual brightness values of all areas of the display screen based on the image information;
the preset brightness value determining module is used for inputting the environment light brightness data into the neural network model to obtain a preset brightness value of the display screen corresponding to the environment light brightness value;
the adjusting module is used for comparing the actual brightness value of each region with the preset brightness value and adjusting the brightness of the region according to the comparison result, and comprises any one of the following steps:
when the actual brightness value of the area is equal to the preset brightness value, maintaining the current actual brightness value;
when the actual brightness value of the area is greater than the preset brightness value, enabling a supplementary lighting driving circuit corresponding to the area to drive and reduce the current of a supplementary lighting light source, and if the area is still greater than the preset brightness value after the supplementary lighting light source is turned off, enabling a light emitting driving circuit corresponding to the area to reduce the current for driving the light emitting light source, so that the area reaches the preset brightness value;
when the actual brightness value of the area is smaller than the preset brightness value, if the current of the light-emitting light source driven by the light-emitting driving circuit corresponding to the area is smaller than the maximum current value, the current is increased; otherwise, enabling the light supplement driving circuit corresponding to the area to increase the current for driving the light emitting source, and enabling the area to reach a preset brightness value.
8. An adaptive dimming compensation system of an LED display screen is characterized by comprising:
the LED display screen comprises a plurality of areas, wherein each area is internally provided with a light-emitting module, each light-emitting module comprises a light-emitting drive circuit and a light-emitting light source, and the light-emitting drive circuit is connected with the light-emitting light source; each light supplement module comprises a light supplement driving circuit and a light supplement light source, and the light supplement driving circuit is connected with the light supplement power supply; the controller is respectively connected with each light-emitting drive circuit and each light-supplementing drive circuit;
the environment light brightness sensor is used for detecting the environment light brightness and sending the environment light brightness data to the electronic equipment;
the industrial camera is used for shooting the LED display screen and sending shot image information to the electronic equipment;
an electronic device, coupled to the controller, the ambient light level sensor, and the industrial camera, that performs the method of any of claims 1-6.
9. An electronic device, comprising:
at least one processor;
a memory;
at least one application, wherein the at least one application is stored in the memory and configured to be executed by the at least one processor, the at least one application configured to: performing the method of any one of claims 1 to 6.
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