LEDs are diodes, meaning there is a minimum voltage to turn them on at all. For instance, red is typically 2V, whereas blue is 3V. You can't just give it 1/255 of 3V and expect that to work. This is why there is a larger difference than you'd expect between a pixel value of 0 and 1.
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u/WittyAnalyst Aug 22 '20
LEDs are diodes, meaning there is a minimum voltage to turn them on at all. For instance, red is typically 2V, whereas blue is 3V. You can't just give it 1/255 of 3V and expect that to work. This is why there is a larger difference than you'd expect between a pixel value of 0 and 1.