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LED backlit LCD monitors

gorobei

gorobei

Diamond Member
it's been over 2 years since I saw a samsung press release featuring a 24" lcd panel with LED backlight. yet no product releases from anyone. what's the delay?

I just want a non-TN 24" with LED variable contrast, is that too much to ask for?

and where's my flying jetsons car?
 
There's some Samsung LED lit LCD TVs...hopefully monitors will come soon enough. Although...I have an LED lit screen in my laptop and it isn't much different from my BenQ FP241VW which has very uniform lighting and great colours.
 
You'll see your 24" LED LCD once the price comes down below $3k. You can find them but they are still way up there in price.
 
its supposedly harder to cool an LED monitor. at least the 20" ones that are out seem to have to use fans, or very thick cases with tons of fan holes.
 
actually i was talking about the dynamic type led backlighting. where a grid array of led's change brightness behind the crystal/pixel gates to get closer to true blacks. The current laptop led panels just swap the cold cathode tubes for bars of leds and still require a diffuser to break up the backlight bleed.
 
Originally posted by: hans007
its supposedly harder to cool an LED monitor. at least the 20" ones that are out seem to have to use fans, or very thick cases with tons of fan holes.
Click to expand...

That makes no sense though... Don't LEDs produce even less heat than what they use now?
 
Originally posted by: gorobei
actually i was talking about the dynamic type led backlighting. where a grid array of led's change brightness behind the crystal/pixel gates to get closer to true blacks. The current laptop led panels just swap the cold cathode tubes for bars of leds and still require a diffuser to break up the backlight bleed.
Click to expand...

All the LED based panels are like that. They use 50 or so LEDs to cover up the screen, which can be adjusted individually and should improve color uniformity and gamut over a CCFL. The higher end CCFL backlights have gotten better though and the difference isn't as noticeable as it once used to be.

What you're describing would mean having individual LEDs for each pixel, which is prohibitively expensive and is not going to happen before LCD tech is replaced by OLED altogether.
 
Imagine a tritium backlighted panel! 200 curies of H3 in tritiated aerogel form should be able to push brightness to acceptable levels on a 30" panel. Make it transreflective for direct sunlight viewing capability. This would reduce the power consumption to 1W! The panel would have a 10+ year 24/7 lifespan. :Q
 
Originally posted by: Rubycon
Imagine a tritium backlighted panel! 200 curies of H3 in tritiated aerogel form should be able to push brightness to acceptable levels on a 30" panel. Make it transreflective for direct sunlight viewing capability. This would reduce the power consumption to 1W! The panel would have a 10+ year 24/7 lifespan. :Q
Click to expand...

Tritium is especially harmful isn't it? Isn't it a byproduct of certain nuclear processes? Is my sarcastometer broken? 😛
 
Originally posted by: thilan29

Tritium is especially harmful isn't it? Isn't it a byproduct of certain nuclear processes? Is my sarcastometer broken? 😛
Click to expand...

Tritium is a very weak beta emitter. When encapsulated its emission cannot be detected with the most sensitive radiation monitors. If using borosilicate tubes, for example; and one is fractured at the very most you would be exposed to the equivalent of a bite wing radiograph and that is probably stretching things. 😉 Any residual H3 just gets eliminated through urination.

Compared to radium sulfide excited scintillators, OTOH, H3 traser illumination is far safer.
 
Originally posted by: Rubycon
Imagine a tritium backlighted panel! 200 curies of H3 in tritiated aerogel form should be able to push brightness to acceptable levels on a 30" panel. Make it transreflective for direct sunlight viewing capability. This would reduce the power consumption to 1W! The panel would have a 10+ year 24/7 lifespan. :Q
Click to expand...

How feasible is this? Is tritium cheap?
 
Originally posted by: hans007
its supposedly harder to cool an LED monitor. at least the 20" ones that are out seem to have to use fans, or very thick cases with tons of fan holes.
Click to expand...

I've used the HP 24inch LED backlit monitor and it has a fan that comes on sometimes... its kind of noisy actually.
 
i think the ones with a full LED backlight (instead of just a strip with diffusers) are the ones that heat up a lot. they cost lik e$2000+ too.

I know some sony panels, have 2 CCFL strips for more even lighting. one on top and one on bottom. an LED one with 2 strips especially on a 24" + monitor would b eniec.

but yeah, putting tons of LEDs into a highly enclosed space i think is why it still ends up being harder to cool than a single CCFL at the edge.
 
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