How to achieve automatic brightness adjustment of LED advertising screen

2023-08-19 07:00:25 Ddon Visual

  Full-color LED advertising screen according to different display scenes,different display periods,different display content,the display brightness requirements are not the same,for example,indoor scenes usually need lower display brightness,outdoor scenes because of interference light more reasons,need higher display brightness,but at night,Higher display brightness will bring uncomfortable viewing experience to the audience,therefore,the automatic brightness adjustment function is very key,how is the full color LED advertising screen to achieve automatic brightness adjustment?Today,follow China's Ddon Visual to learn about:

Indoor LED advertising screen

  Components and Materials Needed:

  1、LED Advertising Screen

  2、Light Sensor(such as a photodiode,ambient light sensor,or a lux sensor)

  3、Microcontroller(such as Arduino,Raspberry Pi,or similar)

  4、Voltage Regulator(if needed)

  5、Connecting Wires

  6、Power Supply

  7、Programming Environment and Software(e.g.,Arduino IDE,Python)

Outdoor LED advertising screen


  1、Select the Light Sensor:

  Choose an appropriate light sensor based on your requirements and the available interfaces on your chosen microcontroller.The sensor should be able to accurately measure ambient light levels.

  2、Connect the Components:

  Connect the light sensor to your microcontroller according to their specifications.Usually,you'll have connections for power(VCC),ground(GND),and signal output.If the sensor operates on a different voltage level than your microcontroller,use a voltage regulator to ensure compatibility.

  3、Power Supply:

  Provide power to both the LED advertising screen and the microcontroller.Ensure the power supply meets the voltage and current requirements of both components.


  Write the program that will control the brightness of the LED screen based on the readings from the light sensor.Depending on your chosen microcontroller,you can use languages like Arduino's C++or Python.

  Read the output from the light sensor.This value represents the ambient light level.

  Map the sensor's output range to the LED screen's brightness range.For example,if your light sensor provides values from 0 to 1023 and your LED screen's brightness can be adjusted from 0 to 255,you'll need to map the sensor values accordingly.

  Use this mapped value to control the brightness of the LED advertising screen.Most LED screens can be controlled through various communication protocols like SPI or I2C.You'll need to adjust the screen's brightness value accordingly using these protocols.

  5、Implement Automatic Adjustment:

  To continuously adjust the brightness,the program needs to run in a loop.Read the light sensor's output at regular intervals(e.g.,every few seconds)and update the LED screen's brightness value accordingly.


  It's important to calibrate the system properly.Test the system in different lighting conditions and adjust the mapping and update intervals to ensure smooth and accurate brightness transitions.


  You might want to implement additional logic to avoid rapid changes in brightness due to minor fluctuations in ambient light.For instance,you could implement a simple moving average filter to smooth out sudden changes.

  8、Testing and Optimization:

  Test the system thoroughly in various lighting conditions and fine-tune the program as needed.Optimize the update intervals and mapping logic for the best user experience.

  9、Enclosure and Installation:

  Once the system is working as expected,enclose the components in a suitable casing to protect them from environmental factors.Install the system with the LED advertising screen at your desired location.

Spherical LED advertising screen

  The automatic brightness adjustment function improves the display clarity of the full-color LED advertising screen,and improves the user experience,so that the full-color LED display can have a better performance in a variety of environments,so now many projects will be equipped with this technology,China Ddon Visual focuses on the development and production and sales of high-quality full-color LED display.Provide full-color LED display module,LED stage rental screen,LED advertising screen spot wholesale and on-site construction,support customized LED display and development services,if you have related projects need assistance,welcome to call Ddon,we will provide you with a full range of product solutions and quality services.

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