Quote:
Originally Posted by m_j
About the flickering, although my cellphone can catch the flickering, but I cannot perceive the flickering with my bare eyes, so I am ok with it. However, it would be better to use other less controversial techniques. I have no idea why Kobo utilizes this controversial method on its premium model.
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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.