Hey all,
I'm working on a 16x16 LED RGB Matrix (picture here), and have come across the following problem.
LED brightness is NOT linear to the human eye. This is because of two reasons.
My question is, what exactly is the relationship between a PWM signal and perceived brightness, and how do I calculate a look-up table to compensate with the correct duty cycles?
Thanks,
TheComet
I'm working on a 16x16 LED RGB Matrix (picture here), and have come across the following problem.
LED brightness is NOT linear to the human eye. This is because of two reasons.
- Forward current vs brightness isn't linear
- The human eye is logarithmic
My question is, what exactly is the relationship between a PWM signal and perceived brightness, and how do I calculate a look-up table to compensate with the correct duty cycles?
Thanks,
TheComet