What are two common ways to control LED display grayscale

The two common ways to control LED display screen grayscale are pulse width modulation (PWM) and current modulation (AM).

1. Pulse Width Modulation (PWM): This method adjusts the grayscale by controlling the ratio of the LED’s power on time to the power off time. LED switches at a high frequency, and the power on time duty cycle within each cycle determines the brightness of the LED. Long power on time, brighter LED display; The power on time is shorter and the LED display is darker.

2. Current Modulation (AM): This method adjusts the grayscale by controlling the current level of the LED. By changing the current intensity of the LED, its brightness can be adjusted. A larger current will make the LED display brighter, while a smaller current will make the LED display darker.
Both methods can effectively control the grayscale of LEDs and are often used in LED displays, lighting systems, and other LED applications.