>> neužmiršk, kad normaliuose LCD dar be RGB būna ir A dedamoji,
>> kas sudarojau 40bit...
>
> - čia tamsta kažką fantazuojate, praktiškai visi LCD turi tris 8-ių bitų  kanalus, kas sudaro 24 bitus.

"visi biudzetiniai".. kai reikia geresnio/reiklesniems, nes pavyzdi pateike:
http://www.tftcentral.co.uk/reviews/content/dell_u3014.htm#panel

Panel and Colour Depth
The Dell U3014 utilises an LG.Display LM300WQ6-SLA1 AH-IPS panel
which is capable of producing 1.07 billion colours. According to the detailed
panel spec sheet this is done with a 10-bit colour depth and there is
no mention of Frame Rate Control (FRC) being used.

Kadaise (gal jau pries kokius 6metus, t.y. ~2009) ikandamas buvo:
http://www.tftcentral.co.uk/reviews/dell_u2410.htm
Colour Depth
16.7M panel (8-bit) from palette of 1.07 billion.
102% colour gamut and 10-bit internal colour processing
Po kiek laiko (~2011) tas ~1000Lt -> ~600Lt ... su eIPS (tipo wtf ekonominis IPS'as?):
http://www.tftcentral.co.uk/reviews/content/dell_u2412m.htm
<..> Of interest are the use of an e-IPS panel combined with LED backlighting <..>
Colour Depth 16.7m (6-bit + A-FRC)

Biudzetiniai prilipo megejams, o paskui praktiskai visiems..
Reiklesni kiek brangesnius ziuredavosi, tarkim minimumas po U2410 buvo U2413:
http://www.tftcentral.co.uk/reviews/dell_u2413.htm
Note the absence of the "M" at the end, as this is again a return to the
higher end specs of the U2410 (8-bit + FRC panel = 1.07b colours).
In fact the U2413 is designed to replace the U2410 <..>

Tuo labiau pasirinkimas tais "ikandamais" DELL'ais neapsiriboja..

> p.s.
> .. senesni modeliai buvo tik po 5-is bitus kanalui, t.y. tik 15 bitų.

triju bitu nenuknisai?.. 262144 = 2^18 .. t.y. 2^3^6 ..
nes jei labai giliai kapstai, tai ir CRT buvo visokiu CGA, EGA ir pan.
o jei apie LCD, tai ir dabar buna 1bit'o ekraniuku visokiuose skaiciuotuvuose..