LCD colour depth

[borat]

can Modern LCD's actually fully produce anything above 16bit colour depth? i seem to remember reading ages ago they could not but wondered if things had changed at all
cheers
will

[JTD]

Re: LCD colour depth

Originally posted by borat
can Modern LCD's actually fully produce anything above 16bit colour depth? i seem to remember reading ages ago they could not but wondered if things had changed at all
cheers
will

At least some can:

http://www.viewsoniceurope.com/dk/Products/LCDGraphics/VG700b.htm

Look under the specifications (a bit down on the page): TFT active matrix SXGA LCD (16.7 mio colours).

[Greebe]

only the higher end models can, most a far less and even then are interpolated (correct term?... tired) from a much lower color depth, typically 6-8 bit if memory serves me correct

[Fluff]

On another note... With DVI, what is the maximum number of colours that can be sent? 16.7million?

[Greebe]

Would you like the DVI 1.0 spec pdf... will up it to my ftp

or you can grab it yourself from www.ddwg.org after registering

[Jammrock]

The main reason why manufactures go with 6-/8-bit is because it's cheaper and they get better response rates. All the sub-20 ms refresh LCDs are 6-bit color depth. So if you're looking for a dual gaming/graphics/CAD style LCD, you're screwed.

The recommendation is to get the LCD that fits the bill best, i.e. whether graphics and color are more important than refresh rate for gaming and video.

Jammrock

[rylan]

Yeah a lot of the 15" and some 17" LCDs use an interface from their A/D electronic board to the panel called '6bit +2FRS', or actually use native 6 bit glass. With 6bit you get 262K colors. The "FRS" method is basically an interpolation done on the scalar chip so they can use a cheaper dvi receiver and cheaper scalar. You won't get 16.7mil colors with that obviously, but its better than the 262K.

Now, even though the better LCDs (from 19" up) claim 16.7million colors due to 8bit/color, you're not realistically going to get that because of technological limitations of the actual LCD crystals and structure of the panel. Instead of 24 bits, its closer to 21 bits of actual visible color data if measured. Thats where CRTs are still superior to LCDs... accurate color reproduction.

[borat]

well i just had the weirdest thing happen, i currently have a dell 20" LCD connected via DVI to a radeon 7000 PCI, i had the colour depth set to 32 bit. When i tried to scroll in any application it cursor would low down to a crawl and it would scroll pitifully slowly when veiwing things like these forums, now i have the colour depth set to 16 bit and everything is fine. Found it quite bizarre as it never happens when the screen is hooked onto my parhelia.

[UtwigMU]

borat, I think Radeon7000 might run in memory limitations at 16x12@32-bit.

[borat]

not really up to speed with memory limitations and Resolutions, what do you mean by this?

[Greebe]

Originally posted by UtwigMU
borat, I think Radeon7000 might run in memory limitations at 16x12@32-bit.

I don't.

[The PIT]

This is why I'm thinking off buying another CRT for my Photos. The differance between the print outs and whats is displayed is quite marked with my Dell.

Didn't have that problem with the CRT.

Yes I'm am using the correct icc for both devices.

I then think about ATI's drivers getting mixed up over which driver too use when you have two very different monitors.

[rylan]

Borat, you're pushing too much data over the PCI bus and saturating the available bandwidth at that resolution and color depth... hence the apparent slowdown.

[Fluff]

http://www.candescent.com/showcase.htm#Product%20Display

Problem solved.... Well not quite yet..

[Wombat]

Originally posted by rylan
Borat, you're pushing too much data over the PCI bus and saturating the available bandwidth at that resolution and color depth... hence the apparent slowdown.

I doubt that's what is happening. Maybe a bus-mastering issue, or badly installed drivers, or something.