CN114241985B - Adaptive dimming compensation method of LED display screen - Google Patents
Adaptive dimming compensation method of LED display screen Download PDFInfo
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- CN114241985B CN114241985B CN202210169025.9A CN202210169025A CN114241985B CN 114241985 B CN114241985 B CN 114241985B CN 202210169025 A CN202210169025 A CN 202210169025A CN 114241985 B CN114241985 B CN 114241985B
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to the field of LED display screens, and discloses an adaptive dimming compensation method of an LED display screen, which comprises the following steps: step 1: setting a data temporary storage area as a storage medium for all collected data and analyzed data; step 2: a power supply is arranged to provide stabilized voltage supply for all power utilization units, and a power supply interface is communicated with a driving circuit of the LDE lamp screen; step 3: setting an ambient light brightness threshold and a display screen heat threshold, providing a recommended selection threshold according to the sensed temperature, and if the operation is not executed, taking the recommended selection threshold as a default execution option. The LED lamp screen can collect and analyze the ambient light signal and the heat signal, can automatically adjust the intensity of light according to the brightness of the environment, is convenient, enables the brightness of the LED lamp screen to quickly reach the expected effect of a user, can detect and collect heat energy, can alarm and remind when the brightness exceeds a threshold value, prevents equipment damage caused by overheating, and can start a light supplementing component to improve the brightness when the LED display screen has insufficient brightness and cannot be enhanced.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to an adaptive dimming compensation method of an LED display screen.
Background
An LED screen is a new type of imaging electronics made with light emitting diodes arranged in sequence. Because of the characteristics of high brightness, wide visual angle, long service life and the like, the LED light source is widely applied to products such as outdoor advertising screens and the like, the LED light source is adopted for illumination, and can replace incandescent lamps with higher power consumption, so that a large amount of electric energy can be saved, the LED light source is more cost-effective to apply in a plurality of places needing long-term illumination, the LED uses a low-voltage power supply, the power supply voltage is between 6 and 24V and is different according to different products, so that the LED light source is a safer power supply than a high-voltage power supply, and is particularly suitable for public places;
when a user sets an LED lamp screen, the brightness can be set in advance, but the conventional LED display screen lacks a self-adaptive light modulation compensation method, the user often cannot achieve the expected effect of the user due to the influence of factors such as weather after arrangement is finished, the brightness cannot be automatically adjusted according to the brightness of the environment, inconvenience is caused, and the LED display screen is easy to overheat under the condition of long-time work or high-temperature environment and lacks early warning measures.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides an adaptive dimming compensation method for an LED display screen, which can effectively solve the problems that the prior art is lack of adaptive dimming compensation, the brightness cannot be expected by a user due to the influence of factors such as weather after the user is arranged, the intensity of light is difficult to be automatically adjusted according to the brightness of the environment, inconvenience is caused, and the LED display screen is easy to overheat and lack of early warning measures under the working condition of long time or high-temperature environment.
(II) technical scheme
In order to achieve the above objects, the present invention is achieved by the following technical solutions,
the invention discloses a self-adaptive light modulation compensation method of an LED display screen, which comprises the following steps:
step 1: setting a data temporary storage area as a storage medium for all collected data and analyzed data;
step 2: setting a power supply, providing stabilized voltage supply for all power utilization units, and communicating a power supply interface with a driving circuit of the LDE lamp screen;
step 3: setting an ambient light brightness threshold and a display screen heat threshold, providing a recommended selection threshold according to the induction temperature, and if the operation is not executed, taking the recommended selection threshold as a default execution option;
step 4: starting a driving circuit, sending a PWM signal to drive an LED lamp to be on, setting the lamp light brightness, recording the set lamp light brightness, and defaulting the brightness to operate when the LED lamp is started for the second time;
step 5: collecting the intensity of an ambient light signal, performing photoelectric conversion and A/D conversion, setting a detection time period, and starting periodically;
step 6: collecting an environment heat energy signal, converting the heat energy signal into readable data, setting a detection time period, and starting at regular intervals;
step 7: submitting the acquired signal data to a control end for analysis and judgment, and storing the acquired data into a database in a mirror image manner;
step 8: if the brightness is judged to accord with the set threshold and the heat is judged to accord with the set threshold, the operation is continued according to the setting;
step 9: if the brightness is lower than the set threshold or the heat exceeds the set threshold, alarming, editing alarm information and submitting the alarm information to a database for storage;
step 10: the control end calculates the deviation value of the actual light brightness and the set light, marks the deviation value and highlights;
step 11: sending a signal according to the deviation value, and resetting the brightness value of the lamplight;
step 12: starting a standby light supplement measure when the brightness is insufficient, wherein the triggering mode comprises artificial active triggering and automatic triggering when the triggering requirement is met;
step 13: and generating a detection report and submitting the detection report to a storage end.
Furthermore, the data temporary storage area in Step1 is stored in a manner of classifying the collected data and the analyzed data, and sorting the collected data and the analyzed data according to a time sequence.
Further, the power supply in Step2 includes digital power supply required by all power chips, analog power supply required by the acquisition unit and power supply of the LED driving circuit.
Further, in Step3, the device for setting the ambient light brightness threshold is a light signal collector, and the device for setting the display screen thermal threshold is a thermal sensor.
Furthermore, the ambient light signal in Step5 is collected through a photoresistor and an adjustable resistor;
the photoresistor changes the resistance of the photoresistor by the intensity of the current ambient light, changes the voltage at two ends of the photoresistor and controls the bright and dark effects of the LED lamp;
and the adjustable resistor changes the sensitivity of the photoresistor by changing the size of the resistor.
Furthermore, in Step6, the ambient thermal energy signal is collected by focusing infrared energy on the photodetector and converting into a corresponding electrical signal, which is converted into a temperature value of the target to be measured after passing through an amplifier and a signal processing circuit and being corrected according to an algorithm inside the instrument and the target emissivity.
Further, the alarm prompt in Step9 is used to prompt an automatic alarm when the ambient light is lower than the set ambient light alarm value, and to display the intensity of the ambient light in real time.
Further, the attributes of the detection report in Step13 include: detection time, problem duration and specific numerical value of deviation.
Further, the setting and starting process of the supplementary lighting measure in Step12 includes the following steps:
s1: setting a standby light supplementing component, and keeping a normally-closed state by default;
s2: when the brightness of the LED lamp screen is insufficient, the control end sends a control instruction to supply power to the light supplementing component;
s3: the driving circuit sends out a PWM signal to drive the light supplementing component to be on;
s4: calculating the difference value between the actual brightness and the expected brightness according to the acquired brightness data;
s5: according to the difference value, the control end sends an adjusting instruction and sets the brightness of the light supplementing component;
s6: collecting a heat energy signal and an optical signal of a light supplementing component, and adding the heat energy signal and the optical signal into main calculation data;
s7: when the brightness of the induction LED lamp screen can be adjusted to be in a normal state, the light supplementing component stops responding and cuts off power supply.
Furthermore, the spare light supplement component in step S1 is an illumination device with the same power specification, patch mode and illumination color as the LED lamp screen, and is uniformly inserted and installed inside the LED lamp screen.
(III) advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects,
1. the LED lamp screen can collect and analyze the ambient light signal and the heat signal, can automatically adjust the intensity of light according to the brightness of the environment, is convenient, enables the brightness of the LED lamp screen to quickly reach the expected effect of a user, can detect and collect heat energy, can alarm and remind when the brightness exceeds a threshold value, and prevents equipment damage caused by overheating.
2. According to the invention, by means of the measure of adding the standby light supplementing component, when the LED display screen has insufficient brightness and cannot be enhanced, the light supplementing component can be started to improve the brightness, a standby emergency scheme is provided, the stability of the equipment during operation is improved, and the practicability is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic flow chart of an adaptive dimming compensation method for an LED display screen;
FIG. 2 is a schematic flow chart illustrating a setting and starting process of a light supplement measure according to the present invention;
fig. 3 is a schematic diagram of an adaptive dimming compensation method for an LED display panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and 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 invention.
The present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1 and 3, the adaptive dimming compensation method for an LED display screen of this embodiment includes the following steps:
step 1: setting a data temporary storage area as a storage medium for all collected data and analyzed data;
step 2: setting a power supply, providing stabilized voltage supply for all power utilization units, and communicating a power supply interface with a driving circuit of the LDE lamp screen;
step 3: setting an ambient light brightness threshold and a display screen heat threshold, providing a recommended selection threshold according to the induction temperature, and if the operation is not executed, taking the recommended selection threshold as a default execution option;
step 4: starting a driving circuit, sending a PWM signal to drive an LED lamp to be on, setting the lamp brightness, recording the set lamp brightness, and defaulting the brightness to operate when the LED lamp is started for the second time;
step 5: collecting the intensity of an ambient light signal, performing photoelectric conversion and A/D conversion, setting a detection time period, and starting periodically;
step 6: collecting an environment heat energy signal, converting the heat energy signal into readable data, setting a detection time period, and starting at regular intervals;
step 7: submitting the acquired signal data to a control end for analysis and judgment, and storing the acquired data in a database in a mirror image manner;
step 8: if the light brightness is judged to accord with the set threshold value and the heat quantity is judged to accord with the set threshold value, the operation is continued according to the setting;
step 9: if the brightness is lower than the set threshold or the heat exceeds the set threshold, alarming is prompted, alarming information is edited, and the alarming information is submitted to a database for storage;
step 10: the control end calculates the deviation value of the actual light brightness and the set light, marks the deviation value and highlights;
step 11: sending a signal according to the deviation value, and resetting the brightness value of the lamplight;
step 12: starting a standby light supplement measure when the brightness is insufficient, wherein the triggering mode comprises artificial active triggering and automatic triggering when the triggering requirement is met;
step 13: and generating a detection report and submitting the detection report to a storage end.
As shown in fig. 1, the data temporary storage area in Step1 stores the collected data and the analyzed data in a classified manner, and sorts the collected data and the analyzed data in a time sequence.
As shown in fig. 1, the power supply in Step2 includes digital power supplies required by all power chips, analog power supplies required by the acquisition unit, and power supplies of the LED driving circuit.
As shown in fig. 1, in Step3, the device for setting the ambient light brightness threshold is a light signal collector, and the device for setting the display screen thermal threshold is a thermal sensor.
As shown in fig. 1, the alarm prompt in Step9 is used to prompt an automatic alarm when the ambient light is lower than the set ambient light alarm value, and to display the intensity of the ambient light in real time.
As shown in fig. 1, the attributes of the detection report in Step13 include: detection time, problem duration and specific numerical value of deviation.
In the specific implementation of the embodiment, a user starts a driving circuit to supply power to an LED lamp screen, sets an ambient light brightness threshold and a display screen heat threshold, provides a recommended selection threshold according to the sensed temperature, takes the recommended selection threshold as a default execution option if the operation is not executed, collects the ambient light brightness and detects the heat in the use process, gives an alarm when the brightness is lower than the set threshold, adjusts the light brightness, gives an alarm when the heat exceeds the set threshold, reminds the user, and overhauls the user;
the LED lamp screen brightness detection system has the advantages that the signal and the heat signal of the ambient light can be collected and analyzed, the intensity of the light can be automatically adjusted according to the brightness of the environment, convenience is achieved, the LED lamp screen brightness can quickly achieve the expected effect of a user, heat energy can be detected and collected, when the LED lamp screen brightness exceeds a threshold value, the alarm can be given to the police to remind, and damage to equipment caused by overheating is prevented.
Example 2
In other aspects, the present embodiment further provides a setting and starting process of the light supplement measure, as shown in fig. 2, including the following steps:
s1: setting a standby light supplementing component, and keeping a normally-closed state by default;
s2: when the brightness of the LED lamp screen is insufficient, the control end sends a control instruction to supply power to the light supplementing component;
s3: the driving circuit sends out a PWM signal to drive the light supplementing component to be on;
s4: calculating the difference value between the actual brightness and the expected brightness according to the acquired brightness data;
s5: according to the difference value, the control end sends an adjusting instruction and sets the brightness of the light supplementing component;
s6: collecting a heat energy signal and an optical signal of the light supplementing component, and adding the heat energy signal and the optical signal into main calculation data;
s7: when the brightness of the induction LED lamp screen can be adjusted to be in a normal state, the light supplementing component stops responding and cuts off power supply.
As shown in fig. 2, the spare light supplement component in step S1 is a lighting device with the same power specification, patch mode and lighting color as the LED lamp screen, and is uniformly inserted into the LED lamp screen.
Through the arrangement, when the light supplementing component is started, the brightness is adjusted according to the difference value between the actual brightness and the expected set brightness, and the LED lamp screen is supplemented with light;
when the LED display screen has insufficient brightness, and the LED display screen can not be enhanced, the light supplementing component can be started to increase the brightness, a standby emergency scheme is provided, the stability of the equipment during operation is improved, and the practicability is ensured.
Example 3
In this example, as shown in fig. 1, the ambient light signal in Step5 is collected through a photoresistor and an adjustable resistor;
the photoresistor changes the resistance of the photoresistor by the intensity of the current ambient light, changes the voltage at two ends of the photoresistor and controls the bright and dark effects of the LED lamp;
and the adjustable resistor changes the sensitivity of the photoresistor by changing the size of the resistor.
As shown in fig. 1, in Step6, the ambient thermal energy signal is collected by focusing infrared energy on the photodetector and converting into a corresponding electrical signal, which is converted into a temperature value of the target to be measured after passing through an amplifier and a signal processing circuit and being corrected according to an algorithm inside the instrument and the target emissivity.
In conclusion, a user starts a driving circuit to supply power to an LED lamp screen, sets an ambient light brightness threshold and a display screen heat threshold, provides a recommended selection threshold according to the sensed temperature, if the operation is not executed, the recommended selection threshold is used as a default execution option, during the use process, the ambient light brightness is collected and the heat is detected, when the brightness is lower than the set threshold, an alarm is given, the light brightness is adjusted, when the heat exceeds the set threshold, the alarm is given in the same way, the user is reminded, the user is overhauled, when a light supplementing component is started, the brightness is adjusted according to the difference between the actual brightness and the expected set brightness, and the LED lamp screen is supplemented with light;
the LED lamp screen can collect the ambient light signal and the heat signal for analysis, can automatically adjust the intensity of light according to the brightness of the environment, is convenient, enables the brightness of the LED lamp screen to quickly reach the expected effect of a user, can detect and collect heat energy, can alarm and remind when the brightness exceeds a threshold value, and prevents equipment damage caused by overheating;
according to the invention, by means of the measure of adding the standby light supplementing component, when the LED display screen has insufficient brightness and cannot be enhanced, the light supplementing component can be started to improve the brightness, a standby emergency scheme is provided, the stability of the equipment during operation is improved, and the practicability is ensured.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. An adaptive dimming compensation method of an LED display screen is characterized by comprising the following steps:
step 1: setting a data temporary storage area as a storage medium for all collected data and analyzed data;
step 2: setting a power supply, providing stabilized voltage supply for all power utilization units, and communicating a power supply interface with a driving circuit of the LDE lamp screen;
step 3: setting an ambient light brightness threshold and a display screen heat threshold, providing a recommended selection threshold according to the induction temperature, and if the operation is not executed, taking the recommended selection threshold as a default execution option;
step 4: starting a driving circuit, sending a PWM signal to drive an LED lamp to be on, setting the lamp light brightness, recording the set lamp light brightness, and defaulting the brightness to operate when the LED lamp is started for the second time;
step 5: collecting the intensity of an ambient light signal, performing photoelectric conversion and A/D conversion, setting a detection time period, and starting periodically;
step 6: collecting an environment heat energy signal, converting the heat energy signal into readable data, setting a detection time period, and starting at regular intervals;
step 7: submitting the acquired signal data to a control end for analysis and judgment, and storing the acquired data into a database in a mirror image manner;
step 8: if the light brightness is judged to accord with the set threshold value and the heat quantity is judged to accord with the set threshold value, the operation is continued according to the setting;
step 9: judging that the brightness is lower than a set threshold value, performing alarm prompting, judging that the heat exceeds the set threshold value, performing alarm prompting, editing alarm information, submitting to a database for storage;
step 10: the control end calculates the deviation value of the actual light brightness and the set light, marks the deviation value and highlights;
step 11: sending a signal according to the deviation value, and resetting the brightness value of the lamplight;
step 12: when the brightness is insufficient and the enhancement cannot be carried out, starting a standby supplementary lighting measure, wherein the triggering mode comprises artificial active triggering and automatic triggering when the triggering requirement is met;
step 13: generating a detection report and submitting the detection report to a storage end;
the setting and starting process of the supplementary lighting measure in Step12 includes the following steps:
s1: setting a standby light supplementing component, and keeping a normally-closed state by default;
s2: when the brightness of the LED lamp screen is insufficient, the control end sends a control instruction to supply power to the light supplementing component;
s3: the driving circuit sends out a PWM signal to drive the light supplementing component to be on;
s4: calculating the difference value between the actual brightness and the expected brightness according to the acquired brightness data;
s5: according to the difference value, the control end sends an adjusting instruction and sets the brightness of the light supplementing component;
s6: collecting a heat energy signal and an optical signal of the light supplementing component, and adding the heat energy signal and the optical signal into main calculation data;
s7: when the brightness of the induction LED lamp screen can be adjusted to be in a normal state, the light supplementing component stops responding and cuts off power supply.
2. The adaptive dimming compensation method for LED display screen according to claim 1, wherein the data buffer of Step1 is stored by classifying the collected data and the analyzed data and sorting them according to time sequence.
3. The adaptive dimming compensation method for the LED display screen according to claim 1, wherein the power source in Step2 includes digital power source required by all power chips, analog power source required by the acquisition unit, and power source of the LED driving circuit.
4. The adaptive dimming compensation method for the LED display screen according to claim 1, wherein the device for setting the ambient light brightness threshold in Step3 is an optical signal collector, and the device for setting the display screen thermal threshold is a thermal sensor.
5. The adaptive dimming compensation method for LED display screen according to claim 1, wherein the Step of collecting the ambient light signal in Step5 is performed by a photoresistor and an adjustable resistor;
the photoresistor changes the resistance of the photoresistor by the intensity of the current ambient light, changes the voltage at two ends of the photoresistor and controls the bright and dark effects of the LED lamp;
and the adjustable resistor changes the sensitivity of the photoresistor by changing the size of the resistor.
6. The adaptive dimming compensation method for LED display screen according to claim 1, wherein the ambient thermal energy signal is collected in Step6 by focusing the infrared energy on the photodetector and converting into corresponding electrical signal, which is converted into the temperature value of the measured target after passing through the amplifier and the signal processing circuit and being corrected according to the algorithm inside the instrument and the target emissivity.
7. The adaptive dimming compensation method for the LED display screen according to claim 1, wherein the alarm prompt in Step9 is used to perform an automatic alarm prompt when the ambient light is lower than the set ambient light alarm value, and display the intensity of the ambient light in real time.
8. The adaptive dimming compensation method for LED display screen according to claim 1, wherein the attribute of the detection report in Step13 comprises: detection time, problem duration and specific numerical value of deviation.
9. The adaptive dimming compensation method for the LED display screen according to claim 1, wherein the spare light supplement component in step S1 is an illumination device with the same power specification, patch mode and illumination color as the LED light screen, and is uniformly inserted and installed inside the LED light screen.
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| CN104978903A (en) * | 2015-06-26 | 2015-10-14 | 繁昌县江林广告设计制作有限公司 | LED display screen used outdoors |
| CN106793321A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山格尚智能装备有限公司 | A kind of LED screen light-supplementing system |
| CN207441130U (en) * | 2017-08-25 | 2018-06-01 | 南昌理工学院 | LED dot matrix display screens |
| CN107948308B (en) * | 2017-12-13 | 2021-01-15 | 深圳市飓风智云科技有限公司 | Intelligent real-time dynamic display brightness adjusting system and method for display device |
| CN111063296A (en) * | 2020-01-11 | 2020-04-24 | 安徽成业电子科技有限公司 | LED display screen power switch control system |
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