General > General Technical Chat
Why do backlight LEDs burn out and go blue?
wraper:
strawberry:
make so called old tech unappealing and degrade it and then replace it with more predictable (shorter) life product then add commercials at bootup and everyone is happy ;D
LCD block ~1/2 backlight while white is displayed
PlainName:
--- Quote ---LCD block ~1/2 backlight while white is displayed
--- End quote ---
That makes sense - white is essentially unobstructed whereas other colours reduce the intensity because R, G or B are filtered, so without artificially reducing white it would appear too bright in comparison.
wraper:
--- Quote from: dunkemhigh on November 14, 2021, 01:44:25 pm ---
--- Quote ---LCD block ~1/2 backlight while white is displayed
--- End quote ---
That makes sense - white is essentially unobstructed whereas other colours reduce the intensity because R, G or B are filtered, so without artificially reducing white it would appear too bright in comparison.
--- End quote ---
What? White is not artificially reduced. There is a light loss because subpixels have color filter behind them and pass only narrow range of wavelength. When 3 colors are combined in your eye, you see "white". There are also RGBW displays which add a subpixel without a color filter for better brightness/efficiency, but it reduces picture quality.
strawberry:
I think these are fancy RGB LEDs to increase efficiency and match LCD filters and some might be more fancy switching on/off at black spots
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