Quote:
Originally Posted by DNSB
Hmmm... have you looked at the two main methods for controlling LED brightness? If so, you may notice that variable current has issues with non-linearity between current and brightness not to mention colour shifting as you dim the LEDs. As for the flickering, I found it interesting that we have a claim that no flickering was recorded at 50% brightness yet flickering was recorded at 100% brightness. The designs I have seen for PWM brightness control have all used a 100% duty cycle at 100% brightness so no on/off and no flickering.
I've attached two images showing light output using variable current and PWM. Sadly, the site with the original images is no longer there.
|
Good to know the difference between two methods.
Personally, I have no special opinion about PWM as long as it doesn't affect my eyes and reading. As an end user, all I care about is the reading experience and quality. I would like to leave the technical issues to engineers while I enjoy my reading
