Attention, friends who are using or about to use LED displays. What we are going to explain to you today is: how to enhance the picture quality of the LED display, that is, how to adjust the brightness and clarity of the LED display. The picture quality of outdoor full-color LED screens, large electronic LED screens, and two-color LED displays should be considered in terms of overall brightness, picture width, and picture position correction. Outdoor full-color LED screens and large electronic LED screens require a large number of small sub-systems. First of all, let's first understand the composition of the next small sub-systems.
It includes power supplies, video encoders and decoders, line drivers, digital signal processors (DSP), etc. These subsystems work closely together to produce video images. For the audience, the end result is a super large-screen full-color video with amazing high-definition image quality. Although the audience's cheers for a certain video playback shocked the entire stadium, they did not understand the many functions implemented by the LED driver in the video system.
If you look closely at the display, you will see hundreds of individual video panels. A little closer, you will find that each panel contains 16X16 pixels. Each pixel consists of three LEDs: red, green and blue. The anode of each LED is electrically connected to the output of an LED driver. Eventually, these tens of thousands of LED drivers will control the forward current through hundreds of thousands of LEDs to generate video images.
The challenge for electrical designers is to understand the best way to use LED drivers to control LED current. Most high-end LED drivers provide designers with multiple ways to control the LED current in their system. These drivers have some features that help reduce LED brightness, such as dot correction (DC), pulse width modulation (PWM) dimming, and global brightness control (BC). Although these features provide the same basic function of adjusting LED brightness, their use is different. Understanding how to use these features correctly is the key to having the best quality video.
