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Contrast ratio in LCD-TFT display

Can i consider contrast ratio in LCD-TFT display, in approximated
analysis, independent from forward current of led-backlight? I think
yes, because it is the fraction of light that liquid crystal can
block...or not?
Thanks
 
J

John Devereux

Jan 1, 1970
0
Can i consider contrast ratio in LCD-TFT display, in approximated
analysis, independent from forward current of led-backlight? I think
yes, because it is the fraction of light that liquid crystal can
block...or not?

I would think so too.

More importantly, it is only valid for viewing in total darkness - since
the contrast ratio for TFTs is likely dominated by ambient light
reflection.
 
Another question: if i want to compare white luminance of two display
datasheet, due to different forward current used, how can i do it?I
should know responsivity to calculate it (i think), but how can i
obtain it?
thanks
 
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