Previous in Forum: Technology in Cricket   Next in Forum: fiber optics against copper
Close
Close
Close
4 comments
Rate Comments: Nested
Anonymous Poster

Longevity of OLED's compared to LED's and Rare Earth Phosphor's

01/23/2008 2:54 PM

I am just curious about the lifetime expected from the various technologies now extant to display either Computer or Television type information. IE: My older Monitor which is based on a tube, (Cathode Ray Tube) compared to OLED's doing the same job. The same thing would apply to television screens. I know LED's tend to not last as long as CRT's do, or so my experiences have shown, and it seems that as any new technologies emerge, they tend to initially have problems that the more mature technologies have already managed to address. This is not a new issue, hardly! But as it is not cost effective for the consumer to do this sort of comparisons or testing, is any company or technology leader doing this for the market? Are there any independent testers or results? I would take the test results of a commercial seller to the public with a grain or two of salt, as they would have reason to be perhaps a bit optimistic about the results of any such tests. I'm not suggesting they would flat out lie... Nor do the drug companies, do they? But interpretation is everything, isn't it?

Thank You.

Sincerely:

Chris Mills aka TheRealJunkman (TheRealJunkman@Yahoo.com)

Manager: Project Connect Vets

{A Project to connect Disabled or impoverished Veterans with the rest of the world, and to keep used electronics out of the landfills. We are concerned with the quality of life for these Vets, as well as the quality of our drinking water for generations yet to come. }

Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
United Kingdom - Member - Olde Member!! Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jul 2006
Location: Dunstable, England
Posts: 2821
Good Answers: 45
#1

Re: Longevity of OLED's compared to LED's and Rare Earth Phosphor's

01/23/2008 3:12 PM

"I know LED's tend to not last as long as CRT's do, or so my experiences have shown"

Errrrmmm that's not my experience, LEDs have a far greater life once past the first several hours (i.e. the bath tub curve) than a CRT, especially when in a hostile environment with vibration, temperature change, humidity and shock.

As for OLEDs I haven't used them yet so I can't comment on their longevity.

John.

__________________
A little knowledge is a dangerous thing - Googling is far worse!
Reply
Power-User

Join Date: Jan 2008
Location: Toronto, Canada
Posts: 302
Good Answers: 4
#2

Re: Longevity of OLED's compared to LED's and Rare Earth Phosphor's

01/23/2008 4:17 PM

LED or LCD? Both last a very long time as long as they're not over current and over heat. Heat is the biggest problem for all semi-conductor. Another problem with LCD is dead pixel. Its pretty annoying for computer monitor which usually has a constant background. For TV, most people won't see it until someone point it out then it got annoying. Still LCD is too new to have any long term test results. They only got mainstream in the past few years compare to CRTs many years (20+?).

__________________
Pineapple
Reply
Guru
Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

Join Date: Sep 2006
Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E
Posts: 17996
Good Answers: 200
#3

Re: Longevity of OLED's compared to LED's and Rare Earth Phosphor's

01/24/2008 2:31 AM

LCDs are OK for a computer screen, but are still not good as TVs due to the fact that the light comes from a source behind the LCD itself and black is always gray.....

LCD screens have problems with fast movements. You should make a video DVD or CD with either grass panned slowly or a wall paper pattern with a small motif panned slowly. If the image "Pumps" on the screen, do not buy that TV!!!

Some LCDs are so bad that large moving letter for example are completely unreadable while moving, but perfectly clear when stopped. Colors are generally good though!!

OLED & LED displays actually produce their own light and when they are off, they are black, so a black is black - very important!

OLED displays, when fully online (production wise), should be cheap (they can be made with a modified ink jet printer principle I am told), very thin and very robust. The first (small) displays are now available. Within a few years, they should get very large.....

Plasma are good but suffer from Burn in and short life and are expensive if good and large.....

I am waiting for OLED.....!!

__________________
"What others say about you reveals more about them, than it does you." Anon.
Reply
Guru
United States - Member - New Member Engineering Fields - Mechanical Engineering - New Member Engineering Fields - Petroleum Engineering - New Member Hobbies - Target Shooting - New Member

Join Date: Jan 2008
Location: Spring, Texas
Posts: 3403
Good Answers: 150
#4

Re: Longevity of OLED's compared to LED's and Rare Earth Phosphor's

02/11/2008 4:43 PM

it is my (possibly flawed) understanding that OLED's still suffer from shortened life compared to conventional semiconductor LED's. That has been the primary reason why they haven't gone mainstream yet.

__________________
Who is John Galt?
Reply
Reply to Forum Thread 4 comments
Copy to Clipboard

Users who posted comments:

Andy Germany (1); Electroman (1); Pineapple (1); Rorschach (1)

Previous in Forum: Technology in Cricket   Next in Forum: fiber optics against copper

Advertisement