In the context of LED lamps, the terms “linear drive” and “nonlinear drive” refer to different methods of controlling the brightness or intensity of the LEDs within the lamp.
- Linear Drive: Linear drive, also known as analog dimming or continuous dimming, involves adjusting the LED brightness by varying the current flowing through the LEDs in a linear and proportional manner. In linear drive systems, the LED brightness changes smoothly and linearly with the applied control signal. This allows for precise and smooth dimming control over a wide range of brightness levels.
- Nonlinear Drive: Nonlinear drive, also known as digital dimming or discrete dimming, involves adjusting the LED brightness using discrete or stepped levels of brightness. Instead of varying the current in a continuous manner, the LED brightness is controlled by switching the LEDs on and off rapidly or by adjusting the current in predefined steps. Nonlinear drive systems typically use pulse width modulation (PWM) or other digital control methods to achieve dimming. The brightness changes in discrete increments rather than a smooth linear progression.
The choice between linear drive and nonlinear drive depends on the specific application requirements and the desired dimming performance. Linear drive is often preferred when smooth and continuous dimming control is desired, such as in applications where precise lighting adjustments are necessary, or for creating gradual transitions and smooth lighting effects. Nonlinear drive, on the other hand, is suitable for applications where discrete dimming steps or rapid on/off switching is sufficient, or when digital control methods are preferred for simplicity or compatibility with existing systems.
It’s important to note that the dimming method used in LED lamps can vary between different products and manufacturers. It’s recommended to refer to the product specifications or consult the manufacturer to determine the specific dimming capabilities and the type of drive employed in a particular LED lamp.