ViewSonic's VLED221wm has 12000:1 contrast ratio - bit-tech.net Forums

Tim S · 10th Jan 2008, 23:02

http://www.bit-tech.net/news/2008/01...ntrast_ratio/1

ViewSonic has announced a 22 inch LED backlit widescreen monitor with a claimed 12,000:1 dynamic contrast ratio.

C-Sniper · 10th Jan 2008, 23:08

wow.... that contrast ratio is INSANE. quite expensive though so i wouldn't buy it until it became cheaper, and with OLED tech. getting cheaper i think this one might be a little late.

DXR_13KE · 10th Jan 2008, 23:19

i am betting on OLED technology... but this one is interesting.... i hope samsung does another 226BW with dynamic contrast like the ones from "bright side" whose lamps turned on and off.

Mister_Tad · 11th Jan 2008, 00:34

Quote:

Originally Posted by C-Sniper

wow.... that contrast ratio is INSANE. quite expensive though so i wouldn't buy it until it became cheaper, and with OLED tech. getting cheaper i think this one might be a little late.

dynamic contrast ratio though, so it means pretty much naff all.

I was getting excited thinking it had individual control of the LEDs, but it doesn't, so how is it really any better than a CCFL display?

Glider · 11th Jan 2008, 00:47

Maybe a bit more even light distribution and less bleeding at the edges?

cpemma · 11th Jan 2008, 00:59

If you use that monitor in normal room lighting the real contrast ratio is going to be well under 50:1

This guy's even more pessimistic;

Quote:

Contrast ratio refers to the ratio of intensities between the most intense (brightest) and least intense (darkest) elements of a scene, an image, or a display. A CRT in an office environment rarely achieves a contrast ratio better than 10 to 1. A ratio of 30:1 is typical of viewing television in a living room. A very good cinema can achieve a contrast ratio of 100:1.

Another good read here.

Quote:

Equally important here is the fact that the eye would not detect a 3 times improvement in contrast performance - rather, the perceived difference in image performance between these two devices is marginal and detectable only if the room is in total darkness.

will. · 11th Jan 2008, 02:09

I read Gizmodo's guide to contrast ratio, and they basically said it was all bullshit now as it's become one of those marketing terms that people love hearing.

chrisb2e9 · 11th Jan 2008, 04:22

pretty much, I bought my monitor before all the articles about how to read the specs of monitors came out. I wish I had known more back then so i didn't get stuck with a 6 bit screen. I can really notice the dithering in some games. like crysis.

Awoken · 11th Jan 2008, 06:36

The lack of local dimming is a disappointment as this is the benefit of LEDs from what I can see. Doesn't OLED tech degrade quicker than LCD tech?

Journeyer · 11th Jan 2008, 06:59

Quote:

Originally Posted by Awoken

The lack of local dimming is a disappointment as this is the benefit of LEDs from what I can see. Doesn't OLED tech degrade quicker than LCD tech?

Yes. At the time this is true; I don't have any numbers at the moment, but if memory serves me I think the average life expectancy of OLEDs is around the 3 year mark. Not quite sure though, however they do burn out a lot quicker than LCDs for the time being. I'm sure that when OLED technology matures further they will of course also be made more durable.

Just found this by the way;

"Novaled achieved significant improvements for white OLEDs for lighting applications. An efficiency of 35 lm/W and a lifetime of 100,000h were reached at a brightness of 1000 cd/m2."
http://www.oled-info.com/tags/lifetime_0

So, whilst these are primarily designed for illumination, I'm sure the technology can be adapted. Just a matter of time and patience I believe.

Also, whilst this technology certainly is very interesting, and very elegant, I do believe that PHOLEDs show more potential - at least efficiency wise.

talladega · 11th Jan 2008, 07:25

its the blue leds or whatever that have short life. the red and green were fine i think.

Cupboard · 11th Jan 2008, 12:38

I am probably being a bit stupid here, but how can you have more than 100% of a range of colours?
And that is incredibly expensive, I can't see them selling many.

badders · 11th Jan 2008, 15:07

I think in America (NTSC) they only have 12 colours?

Probably makes the advertising stand out more.

Tim S · 11th Jan 2008, 18:39

Quote:

Originally Posted by Cupboard

I am probably being a bit stupid here, but how can you have more than 100% of a range of colours?
And that is incredibly expensive, I can't see them selling many.

Over time, the monitor dims and what ViewSonic is saying is that the screen will have a full colour gamut for its lifetime.

Corvyne · 11th Jan 2008, 23:27

Quote:

Originally Posted by Cupboard

I am probably being a bit stupid here, but how can you have more than 100% of a range of colours?
And that is incredibly expensive, I can't see them selling many.

The NTSC colour gamut does not cover the full range of colours of the visible spectrum it just covers a fair chunk of them, therefore it is quite possible to have a gamut of colours larger than NTSC.
Have a look here; http://www.aim-dtp.net/aim/photoshop...r-settings.htm
there are some pretty pictures showing a variety of gamuts and their relationship to the visible spectrum.

Quote:

I was getting excited thinking it had individual control of the LEDs, but it doesn't, so how is it really any better than a CCFL display?

The panel is using RGB LEDs not white ones this means that the LCD panel doesn't have to split the white light into RGB, this give better colour reproduction as pretty much all white light sources are biased towards one colour of the spectrum, i.e. white LEDs are biased towards blue.

Skill3d · 14th Jan 2008, 08:52

Quote:

The panel is using RGB LEDs not white ones this means that the LCD panel doesn't have to split the white light into RGB, this give better colour reproduction as pretty much all white light sources are biased towards one colour of the spectrum, i.e. white LEDs are biased towards blue.

We've got a worked open Samsung LCD backlit tv on my work (which I found out the hard way, by checking the leds from 4 cm and then the thing went on x_x ) and it uses groups of three leds (red blue and green).

user0001 · 15th Jan 2008, 02:13

Not understanding this:

Quote:

What was interesting though was the fact that ViewSonic is using a TN panel in the VLED221wm, which makes the display’s colour reproduction all the more impressive.

I thought it was commonly acknowledged that TN panels were among the worst in terms of color reproduction.

10th Jan 2008, 23:02	#1
Tim S Pewlius Caesar bit-tech Staff Join Date: Nov 2001 Location: Ascot, Berks Posts: 18,021	ViewSonic's VLED221wm has 12000:1 contrast ratio http://www.bit-tech.net/news/2008/01...ntrast_ratio/1 ViewSonic has announced a 22 inch LED backlit widescreen monitor with a claimed 12,000:1 dynamic contrast ratio. __________________ Tim on Twitter \| Tim's Blog \| Tim's Flickr The bit-tech Blog \| bit-tech on Twitter \| Join the bit-tech & Custom PC folding team (#35947)

10th Jan 2008, 23:19	#3
DXR_13KE Madeira's banana is the best!!! Join Date: Sep 2005 Location: Madeira ; Portugal Posts: 6,476	i am betting on OLED technology... but this one is interesting.... i hope samsung does another 226BW with dynamic contrast like the ones from "bright side" whose lamps turned on and off. __________________ *Renegade X - 0.40 Release!* <---- CLICK!

11th Jan 2008, 00:47	#5
Glider /dev/null Join Date: Aug 2005 Location: Belgium Posts: 4,102	Maybe a bit more even light distribution and less bleeding at the edges? __________________ There Are 10 Types Of People, Those Who Know Binary and Those Who Don't

11th Jan 2008, 02:09	#7
will. A motorbike of jealousy! Join Date: Mar 2005 Location: Yorkshire! Posts: 4,406	I read Gizmodo's guide to contrast ratio, and they basically said it was all bullshit now as it's become one of those marketing terms that people love hearing. __________________ work \| play \| blog PS3 & 360: willblack Flickr my twitter. Last.FM Check out my Last.FM & iToggle & Nav-o-Matic jQuery plugins.

11th Jan 2008, 04:22	#8
chrisb2e9 Dont do that... Join Date: Jun 2007 Location: Alberta, Canada Posts: 3,068	pretty much, I bought my monitor before all the articles about how to read the specs of monitors came out. I wish I had known more back then so i didn't get stuck with a 6 bit screen. I can really notice the dithering in some games. like crysis. __________________ attack life, it's going to kill you anyway. Long-term relationships are like urban tomatoes: they only grow under special conditions. - Prestidigitweeze Don't hold on to the reigns once you've fallen off the horse, your just going to get dragged to death - SNiiPE_DoGG

11th Jan 2008, 06:36	#9
Awoken Gazing at the stars Join Date: Mar 2004 Location: Marston, Oxford Posts: 1,144	The lack of local dimming is a disappointment as this is the benefit of LEDs from what I can see. Doesn't OLED tech degrade quicker than LCD tech? __________________ Saving for a new desktop and laptop (Ooooh! Is that Windows Mobile 7 and Android 2 around the corner?)

11th Jan 2008, 12:38	#12
Cupboard I'm not a modder. Join Date: Jan 2007 Location: Bury St Edmunds/Durham Uni Posts: 1,848	I am probably being a bit stupid here, but how can you have more than 100% of a range of colours? And that is incredibly expensive, I can't see them selling many. __________________ i7 920, 8800GTS 512, 6GB Corsair all in an Intel DX58SO; 3*320GB RAID5; CM Stacker Samsung Q45.