LCD Pixel Response Time Halved

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LCD Pixel Response Time Halved

Posted by Hemos on Sunday September 5, 2004 @11:15PM from the speeding-things-up dept.

kagaku writes "Japanese newspaper the Nihon Kaizai Shimbun (evil registration required) said that Mitsubishi has mastered a technology to improve the response speed of pixels on LCDs by 100 per cent or more. It's done this by getting rid of the afterimages on screens which known as "ghosts", said the newspaper, and invented a proprietary system called Dual Domain Bend. It cites unnamed sources at Mitsubishi saying that this method produces a response speed of one millisecond when power is applied and five milliseconds when the lights go off and the power goes down. That, the paper said, compares to up to forty milliseconds to switch pixels on and off. While the technique, when it gets to the manufacturing stage, will have immediate benefits for PC monitors, it will also help narrow the gap between LCD TVs and plasma displays, which have a quicker response speed. Here's a non-registration required link."

23 of 163 comments (clear)

I like the link by bert.cl · 2004-09-05 23:17 · Score: 4, Funny

Yeah, the non-registration link really tells me a lot more than the blurb... or not ... them evil registrations...
1. Re:I like the link by bert.cl · 2004-09-05 23:54 · Score: 5, Funny
  
  Why yes,
  I am new here, can you tell?
but isn't 100%... by phantasma6 · 2004-09-05 23:17 · Score: 5, Insightful

doesn't a reduction of 100% mean it has been reduced to 0ms?
1. Re:but isn't 100%... by bert.cl · 2004-09-05 23:20 · Score: 3, Insightful
  
  response improved 100% procent, time wasn't reduced 100% i guess time was reduced 50%, however it's still early, so you can brag with numbers if you know better :)
2. Re:but isn't 100%... by mlyle · 2004-09-06 07:50 · Score: 4, Insightful
  
  response speed of pixels on LCDs by 100 per cent
  
  Or speed, to be more precise. I don't know why this is so hard for everyone to understand.
  
  If I normally drive home at 30 MPH, and I increase my speed by 100% (to 60MPH), I will get home in half the time. So if the rate at which pixels change luminosity increases by 100%, the transition time will fall by a factor of 2.
Not exactly an explanation by beeglebug · 2004-09-05 23:18 · Score: 5, Insightful

It's done this by getting rid of the afterimages on screens which known as "ghosts"
The pixel response time has been reduced by getting rid of ghosts? Surely that's an effect of the reduction, not a cause?
1. Re:Not exactly an explanation by exp(pi*sqrt(163)) · 2004-09-05 23:57 · Score: 3, Funny
  
  Well they tried exorcism on the individual pixels first and that didn't seem to work.
  
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2. Re:Not exactly an explanation by T-Kir · 2004-09-06 00:05 · Score: 5, Funny
  
  Although the swivel base kept turning the display unit around in circles.
  
  ;-)
  
  --
  Are you local? There's nothing for you here!
Improving outdated technologies by Tennguin · 2004-09-05 23:19 · Score: 3, Interesting

I thought LCD technology was being replaced by DLP? Is this not the case?
1. Re:Improving outdated technologies by TheGavster · 2004-09-06 03:47 · Score: 3, Informative
  
  DLP is a technology replacing the LCDs in high-end projectors. It is also used to replace the CRTs in high-end rear-projection televisions. This innovation improves backlit LCDs used for notebook and desktop computers. The competing tech in that arena is OLED, which is both thinner and does not require a backlight (once it gets rolling, it will also be easier to scale to larger screen sizes because of the inkjet process used to manufacture the displays)
  
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read again by Gentlewhisper · 2004-09-05 23:21 · Score: 5, Funny

"100 per cent or more"

It is actually less than 0ms. The images will appear on your screen before your GPU is even done with it!

Perfect for duke nukem forever!

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Plasma Televisions are not ready for primetime. by John_Allen_Mohammed · 2004-09-05 23:23 · Score: 5, Interesting

Sucks to be me. Bought a 42" plasma television 9 months ago and the brightness has dropped significantly in that time, probably a half of what it was when I bought it. Thats under heavy use, maybe 16-18 hours/day it's on. Anybody else here have the same experience ?

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1. Re:Plasma Televisions are not ready for primetime. by neonstz · 2004-09-05 23:39 · Score: 5, Funny
  
  ...or maybe your eyes are just tired of watching TV 16-18 hours every day in 9 months?
2. Re:Plasma Televisions are not ready for primetime. by mikael · 2004-09-05 23:55 · Score: 5, Informative
  
  Plasma TV's will only last around five years. During that time the brightness will continue to decline. This makes them great for outdoor displays/public events, since there is more chance of a unit being rendered inoperable through transportation/assembly than there is through normal use. The following paper has a graph demonstrating the decline.
  
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Article Text... by OzRoy · 2004-09-05 23:29 · Score: 3, Funny

Wow! This is a great way to preempt a dying web server. Post the entire article in the summary instead of relying on karma whores.
marketing... by taj · 2004-09-05 23:29 · Score: 4, Insightful

100% work*time improvement - Everyone goes what?
50% of the time to display - Everyone says what? then gets it.
twice as fast. - Everyone says oh, OK.

Each increasing easier to understand but decreasingly attractive to marketing droids.

Sigh.
Better numbers by Spy+Hunter · 2004-09-05 23:31 · Score: 5, Interesting

If the pixels can respond to any signal within 5 ms, that means the highest framerate that can be displayed without ghosting is 200 fps (1 / 5ms = 200 Hz). Which is more than you should ever need, and a big improvement on current LCD displays (a good consumer display has a ~20ms response time; 1 / 20ms = 50 Hz, not even 60 fps, but good enough for TV's 30 fps.)

--
main(c,r){for(r=32;r;) printf(++c>31?c=!r--,"\n":c<r?" ":~c&r?" `":" #");}
The Samsung 710T has basically no ghosting. by UranusReallyHertz · 2004-09-05 23:32 · Score: 5, Informative

After days of agonizing between it and the 20 inch Dell, I bought the Samsung 710T and I am pretty happy with it. And I have never noticed any ghosting whatsoever while playing games like Far Cry and Doom 3 and watching movies like Hell Boy. So I think the Response Time is already adequate, at least on the 17 inch sizes.

--
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Bragging with percentages by shoppa · 2004-09-05 23:38 · Score: 4, Insightful

I've seen some games played with percentages:
Product A costs 40% more than product B! Product B costs 29% less than product A!
Both are true... A is $14.00, B is $10.00. The difference is the same arithmetically, but doing it fractionally only serves to confuse things (usually, confuse the customer...)
Things get really out of hand when there's a factor of two:
We are 50% faster than the competition!
From this it's not too far to say
We are twice the speed of the competition!
Which then gets twisted further to
We are 100% faster than the competition!
It's that last step that's most dubious to me, arithmetically (or geometrically) there's no justification.
1. Re:Bragging with percentages by RealProgrammer · 2004-09-06 00:04 · Score: 3, Informative
  Things get really out of hand when there's a factor of two:
  
  We are 50% faster than the competition!
  
  From this it's not too far to say
  
  We are twice the speed of the competition!
  
  In your example, that's where the deception is:
  "50% faster" means 1.5 times faster.
  
  "100% faster" means 2 times faster.
  --
  sigs, as if you care.
But.. by adeyadey · 2004-09-05 23:56 · Score: 4, Interesting

Faster switching == more power needed? Not good for laptops..

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Meanwhile by berkut7 · 2004-09-06 00:44 · Score: 4, Informative

Meanwhile Samsung is readying 8ms 19" LCDs for production in Q4 , 2004. 12ms LCDs produce almost no noticeble ghosting, 8ms should be even better at closing the gap to CRTs.
If only by Moraelin · 2004-09-06 02:12 · Score: 4, Interesting

If only those numbers weren't just pulled out of some marketroid's arse just because they look good.

Remember that it's from the same guys who brought you the 14" display with only 10" visible. Or 16ms TFT panels which actually show about 120ms worth of ghosting.

Or 18 bit colour TFT panels + dithering being sold as 24 bit panels. On account that surely making the display shimmer and flicker as it approximates colours by switching between other colours, is exactly what you always wanted in a TFT.

(Someone remind me why a 20-30 Hz shimmer on TFT is better for my eyes than the 85 Hz flicker of a CRT? No really, I keep forgetting.)

The computer industry as a whole is a pretty sad display of lies, shameless lies and IT marketting. But the display part of the industry has got to take the cake.

At least half of the progress since the days of 120ms panels is just more creative ways to measure it, and/or to fudge the numbers.

So basically what I'm getting at is: when you'll see a 5ms display on sale, you can rest assured that it's really a 30-40ms real latency fudged down to 5ms by the marketting department. And after the dithering is applied too, you can probably count on 40-50ms or more.

I really wouldn't set my hopes too high about being able to display 100 fps without ghosting anywhere in the next 5 years.

--
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