The brightness of LED transparent screens can be adjusted, which is crucial for ensuring high-quality visual presentation and energy efficiency management. There are various ways to adjust the brightness of LED transparent screens, mainly including the following methods, and let me explain.
1、 Hardware control
Hardware control usually changes the brightness of an LED by adjusting the current flowing through it. Specifically, adjusting the current can precisely control the brightness of the LED. At the hardware level, this process can be achieved through circuit design and controllers. The relationship between current and LED brightness is roughly as follows:
Ordinary LED tube: The continuous task current is about 20mA, and the brightness of the LED is basically proportional to the current flowing through it.
Duty cycle: Within one cycle T (T=Ton+Off), duty cycle=Ton/T. Increasing Ton leads to an increase in the average current flowing through the LED light and an increase in LED brightness; On the contrary, reducing Ton leads to a decrease in average current and a decrease in LED brightness.
The hardware control method has the characteristics of fast response and high accuracy, and is suitable for occasions with high brightness requirements, such as performing arts stages and indoor exhibitions.
2、 Software control
Software control is more flexible, as it adjusts the brightness by changing the PWM duty cycle of the LED transparent screen driver. Enabling the brightness adjustment function in the display control system allows users to change the brightness of the LED transparent screen by adjusting the corresponding settings based on environmental lighting, internal requirements, or time factors.
Specifically, software adjustment of brightness generally adopts a 256 level adjustable method, which can meet the brightness requirements in different environments. For example:
Indoor environment: Due to the lack of direct sunlight, it is relatively dark, so high brightness is not required to see the screen content clearly. The recommended brightness for LED transparent screens is 1000 to 2000cd/㎡. To save energy and reduce visual fatigue, the screen brightness can be lowered.
Semi outdoor environment: such as glass curtain walls in 4S stores, shopping mall windows, and sales offices. The brightness of such environments is higher than indoors but lower than outdoors, so the brightness selection should be around 2500 to 4000cd/㎡ to ensure the normal display effect of LED transparent screens.
Outdoor environment: Due to prolonged exposure to sunlight, it is difficult to see the screen clearly in strong light environments. Therefore, the brightness of LED transparent screens should be increased to ensure clear screen content. The brightness selection for transparent screens should be around 4500 to 5500cd/㎡. In cloudy or nighttime environments, the screen brightness can be adjusted as needed.
Software control makes the brightness adjustment of LED transparent screens more intelligent and automated. In addition, using software to adjust brightness also has the following advantages:
Easy to operate: Users only need to adjust the brightness through a simple software interface, without the need for complex hardware operations.
Energy saving and environmental protection: Reasonable brightness settings can help reduce energy consumption, extend the lifespan of display screens, and alleviate the burden on the environment.
3、 Automatic adjustment
Automatic brightness adjustment is an intelligent adjustment method that adapts to the ambient brightness. It uses light sensors and other devices to monitor changes in ambient light in real time, and automatically adjusts the brightness of the LED transparent screen through the control system to maintain the best display effect. Automatic brightness adjustment has the following advantages:
Intelligence: No need for manual intervention, the brightness can be automatically adjusted according to changes in ambient light, maintaining a stable display effect.
Flexibility: Suitable for various complex environmental lighting conditions, it can ensure the best display effect of LED transparent screens in various scenes.
In short, through various methods such as hardware control, software control, and automatic adjustment, the brightness of LED transparent screens can be flexibly and accurately adjusted to meet the needs of different environments and scenes.
