 | |
LCD Screens - to they lose brightness with age ?
Miscellaneous PC Hardware Miscellaneous PC hardware topics (comp.sys.ibm.pc.hardware.misc)
 |
| | Thread Tools | Search this Thread | Display Modes |
#1
 
| |||
| |||
|
LCD Screens - to they lose brightness with age ? -
05-22-2006
, 12:13 PM
#2
| |||
| |||
|
|
Does the white light source behind a LCD screen get dim with age? |
brightness. I needed to turn the backlight down when it was new and
it's been on 50% ever since.
--
Steve Wolstenholme Neural Planner Software
EasyNN-plus. The easy way to build neural networks.
http://www.easynn.com
#3
| |||
| |||
|
|
Does the white light source behind a LCD screen get dim with age? |
looses its ability to shine. That is one of the reasons they
are trying to go to LEDs, because they loose brighness
very slowly.
Arno
Quote:
|
-- a d y k e s @ p a n i x . c o m Don't blame me. I voted for Gore. Proudly then, even more so in hindsight. |
#4
| |||
| |||
|
|
Does the white light source behind a LCD screen get dim with age? |
just like any other fluorescent tube. The inverters which drive them also fail,
but they generally either work or don't work, rarely having any comtribution to
reducing light output.
#5
| |||
| |||
|
|
Previously Al Dykes <adykes (AT) panix (DOT) com> wrote: Does the white light source behind a LCD screen get dim with age? Yes. The same problem as with CRTs. The phorphorous substance looses its ability to shine. That is one of the reasons they are trying to go to LEDs, because they loose brighness very slowly. |
backlight in the case (pun intended) of an LCD.
Arno
#6
| |||
| |||
|
|
Does the white light source behind a LCD screen get dim with age? |
goes into standby mode when not in use so that the backlight turns off.
LCD and Plasma TV's also slowly degrade in brightness over time. It happens so
gradually that you may not notice it. Luckily...most are so bright that you need
to turn them down anyways, so you have some room to crank it up later if needed.
The backlights on my Samsung LCD's are rated at a roughly 20,000 hour lifespan
(with 90% certainty). That equates to about 10 hours of usage per day over 5 1/2
years.
(*>
#7
| |||
| |||
|
|
"Al Dykes" <adykes (AT) panix (DOT) com> wrote : Does the white light source behind a LCD screen get dim with age? Yes they do. If you leave your monitor on 24/7 you will want to make sure that it goes into standby mode when not in use so that the backlight turns off. LCD and Plasma TV's also slowly degrade in brightness over time. It happens so gradually that you may not notice it. Luckily...most are so bright that you need to turn them down anyways, so you have some room to crank it up later if needed. The backlights on my Samsung LCD's are rated at a roughly 20,000 hour lifespan (with 90% certainty). That equates to about 10 hours of usage per day over 5 1/2 years. What does the phrase "with 90% certainty" mean? |
How about quoting a MTBF?
--
Jeremy Boden
#8
| |||
| |||
|
|
In message <1276ovthen69i11 (AT) corp (DOT) supernews.com>, Hawk jedi001 (AT) netscape (DOT) net> writes "Al Dykes" <adykes (AT) panix (DOT) com> wrote : Does the white light source behind a LCD screen get dim with age? Yes they do. If you leave your monitor on 24/7 you will want to make sure that it goes into standby mode when not in use so that the backlight turns off. LCD and Plasma TV's also slowly degrade in brightness over time. It happens so gradually that you may not notice it. Luckily...most are so bright that you need to turn them down anyways, so you have some room to crank it up later if needed. The backlights on my Samsung LCD's are rated at a roughly 20,000 hour lifespan (with 90% certainty). That equates to about 10 hours of usage per day over 5 1/2 years. What does the phrase "with 90% certainty" mean? You are either certain or you are not... How about quoting a MTBF? |
50% have failed after the MTBF time (roughly, bad ststistics on my
part, I know).
20'000 hour with 90% means that after 20'000 hours 90% are
still working.
Arno
#9
| |||
| |||
|
|
Previously Jeremy Boden <jeremy (AT) jboden (DOT) demon.co.uk> wrote: In message <1276ovthen69i11 (AT) corp (DOT) supernews.com>, Hawk jedi001 (AT) netscape (DOT) net> writes "Al Dykes" <adykes (AT) panix (DOT) com> wrote : Does the white light source behind a LCD screen get dim with age? Yes they do. If you leave your monitor on 24/7 you will want to make sure that it goes into standby mode when not in use so that the backlight turns off. LCD and Plasma TV's also slowly degrade in brightness over time. It happens so gradually that you may not notice it. Luckily...most are so bright that you need to turn them down anyways, so you have some room to crank it up later if needed. The backlights on my Samsung LCD's are rated at a roughly 20,000 hour lifespan (with 90% certainty). That equates to about 10 hours of usage per day over 5 1/2 years. What does the phrase "with 90% certainty" mean? You are either certain or you are not... How about quoting a MTBF? MTBF is sort-of expected time to failure. i.e. something like 50% have failed after the MTBF time (roughly, bad ststistics on my part, I know). 20'000 hour with 90% means that after 20'000 hours 90% are still working. |
I don't know what the statistical distribution of failure is - perhaps a
100,000 hours MTBF???
My Seagate disk drive (a mechanical device!) quotes a MTBF of
1,400,000hours.
I think I will wait a few years before getting one of these flat panel
gizmos.
--
Jeremy Boden
#10
| |||
| |||
|
|
20'000 hour with 90% means that after 20'000 hours 90% are still working. That sounds pretty bad!!! I don't know what the statistical distribution of failure is - perhaps a 100,000 hours MTBF??? My Seagate disk drive (a mechanical device!) quotes a MTBF of 1,400,000hours. I think I will wait a few years before getting one of these flat panel gizmos. |
many of us will be sticking with the same monitor for 10 years? Besides, that
rating is just for the backlight (which can be replaced). I don't have the figure
offhand, but I'm sure the MTBF for the monitor (minus backlight) is a heck of a
lot longer.
I'm pretty confident that I'll be lured to a new display technology before my
current lcd's give it up.
(*>
|
« Previous Thread
|
Next Thread »
| Thread Tools | Search this Thread |
| Display Modes | |
Linear Mode
| |
Powered by vBulletin Version 3.5.3
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.