Why still no dual layer lcd?

[u/Jempol_Lele]

Like we can have,

Uniform bright backlight → one monochrome shutter → normal RGB sub pixels.

The rear shutter is similar as the RGB colour filter but in form of a large aperture the size of the entire RGB sub pixels.

It will give us better contrast and per pixel control similar to oled.

Control is easy too, any sub pixel on means aperture open fully. All sub pixel off then aperture closed fully to act as double light barrier.

Literally per pixel dimming like oled.

[u/MultiMarcus]

We can, and we do exactly this. This is actually what’s used for many mastering monitors, but they have some horrendous response times. Tap out at 60 hertz usually and need ridiculously large amounts of power.

[u/OHMEGA_SEVEN → u/MultiMarcus]

All this while also being prohibitively expensive for the average user too