An LED controller is an electronic device that manages the lighting states of LED lamps. It processes protocol signals to adjust brightness, color, flashing frequency and dynamic effects like gradient, jump and chase, enabling precise control over single or multiple LEDs. Widely used in landscape lighting, commercial lighting, stage performances and LED display screens, it is divided into simple controllers such as small light strip controllers and professional engineering controllers that support ten-thousand-level pixels. It is a core component for achieving diversified lighting effects in LED systems.