Quote:
Originally Posted by stumped
i am guessing the the blue light filters on LCD tablets use a different method, to suck some of the blue out of the colour display
I found a setting on my Huwaei tabet which turns on a filter at a set time of evening. that works for me because I am done streaming video by than and will only be using tablet for reading
with Kobo, I have that set to auto filter based on time of day - that also works well
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LCDs are illuminated from behind by a "white" light. An LCD color pixel usually consists of 3 sub-pixels, each topped by a red, green, or blue filter. A particular color for a pixel is determined by controlling the amount of light transmitted by the liquid crystal cell of each sub-pixel.
The "blue light filter" is software that applies an additional dimming factor to all blue sub-pixels. There is no need to speculate about this stuff. The information is widely available.