3 ms·
Something like PWM? I bet Macs don't generate analog voltages to fade the LED, it would be expensive.
by PedroDiogo_ 15y ago
Something like PWM?
I bet Macs don't generate analog voltages to fade the LED, it would be expensive.
- wizard_2 15y agoLEDs also don't change brightness with voltage, they do with amperage and usually have an optimal amperage for the LED's design. Brightness can be controlled many ways, the most common way is to use Pulse Width Modulation. It's also a common power saving technique. http://www.reuk.co.uk/LED-Dimmer-Circuit.htm http://www.reuk.co.uk/LED-Dimmer-Circuit.htm
- djahng 15y agoThe patent they reference in the article states that the LED's current is PWMed, where the modulation function is sinusoidal.