LED Or LCD

I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.
Vietnam Vet
82 Abn.Div. 1969

"Vet" wrote:

I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.
Vietnam Vet
82 Abn.Div. 1969


They are both LCD sets. LED is a later version of backliting.
Personally I'd go for the LED if the price difference isn't too
great..

On Wed, 23 Dec 2009 19:25:57 +1300, Mutley
wrote:

"Vet" wrote:

I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.
Vietnam Vet
82 Abn.Div. 1969


They are both LCD sets. LED is a later version of backliting.
Personally I'd go for the LED if the price difference isn't too
great..

LCD panel with LED backlight exist in several versions depending on
what characteristic the designer is trying to improve.

"Standard" LCD TV use backlight of type CCFL. The most basic versions
use a fixed setting for the amount of backlight it uses. That is not
good because the ability to block the light by the LCD pixels is
somewhat limited.

Therefore it is better to have control over the amount of light so
that the brightness (depending on your room lighting) is not
unessisarily bright. This is then a static setting to adapt to your
room and will provide better blacks (instead of greish or blueish
"black") and also better shadow details.

Next step is to include a dynamic regulation of the backlight, the
whole screen at the same time, depending on the picture content.
If done too agressively you will notice and be irritated, but if done
subtle it will improve the subjective maximum contrast.

This is where one version of LED backlight comes in.
LED backlight with local dimming controls the backlight for a local
area (but not individual pixels) with the aim to create even higher
subjective maximum contrast. Some possible drawbacks exist with a
noticable gloria around sharp bright objects like text etc.

Another version of LED backlight focus on building very thin panels.
These do not use local dimming. A possible drawback can be (worse)
uneven backlighting.

Also the colour of these LED:s can vary between models (as is true
also for CCFL models).
The sensitivity for side angle viewing can also vary (as CCFL).

As always, you need to judge the complete picture (with various types
of material) to make the best trade-off.

The update frequency (60/120/240 or in Europe 50/100/200) when talking
about LCD involves motion interpolation between frames and affects the
characteristics for motion, both in film material (24/25Hz content)
and broadcast material (60/50Hz interlaced content).

Compare and look for smoother and/or sharper motion of bright objects.
If the motion interpolation is too agressive, artifacts around moving
contours can be irritating.
/Jan

"Vet" wrote in message
...
I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.





the LED sets are in fact lcds as well - it's just that instead of using
flourescent tubes to light the screen they use LEDs.
in theory they can be better - they can illuminate only the parts of the
screen that need it. leaving the black bits as black instead of dark grey,
but some don't do that so your only gain is in power saving.

true LED sets - OLEDs - organic leds, are still some way off - you'll pay 11
thousand dollars for a 10 inch set that isnt even HD.

the LED backlit sets cost more so you need to see both in action to decide
if you want to pay the extra.



--
Gareth.

that fly...... is your magic wand....
http://dsbdsb.mybrute.com
you fight better when you have a bear!

Vet wrote:
I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.
Vietnam Vet
82 Abn.Div. 1969

While you'll get some useful info here, there are websites that are
educational, such as CNET and consumer reports.

--
john mcwilliams

"Jan B" wrote in message
...
On Wed, 23 Dec 2009 19:25:57 +1300, Mutley
wrote:

"Vet" wrote:

I am going to buy a new TV set.I need to know if the LED are better than
LCD? What is the pros and cons?.Also is 220 hertz better then 120 hertz?.
Thanks for any input as I am not up to the new technology.
Vietnam Vet
82 Abn.Div. 1969


They are both LCD sets. LED is a later version of backliting.
Personally I'd go for the LED if the price difference isn't too
great..

LCD panel with LED backlight exist in several versions depending on
what characteristic the designer is trying to improve.

"Standard" LCD TV use backlight of type CCFL. The most basic versions
use a fixed setting for the amount of backlight it uses. That is not
good because the ability to block the light by the LCD pixels is
somewhat limited.

Therefore it is better to have control over the amount of light so
that the brightness (depending on your room lighting) is not
unessisarily bright. This is then a static setting to adapt to your
room and will provide better blacks (instead of greish or blueish
"black") and also better shadow details.

Next step is to include a dynamic regulation of the backlight, the
whole screen at the same time, depending on the picture content.
If done too agressively you will notice and be irritated, but if done
subtle it will improve the subjective maximum contrast.

This is where one version of LED backlight comes in.
LED backlight with local dimming controls the backlight for a local
area (but not individual pixels) with the aim to create even higher
subjective maximum contrast. Some possible drawbacks exist with a
noticable gloria around sharp bright objects like text etc.

Another version of LED backlight focus on building very thin panels.
These do not use local dimming. A possible drawback can be (worse)
uneven backlighting.

Also the colour of these LED:s can vary between models (as is true
also for CCFL models).
The sensitivity for side angle viewing can also vary (as CCFL).

As always, you need to judge the complete picture (with various types
of material) to make the best trade-off.

The update frequency (60/120/240 or in Europe 50/100/200) when talking
about LCD involves motion interpolation between frames and affects the
characteristics for motion, both in film material (24/25Hz content)
and broadcast material (60/50Hz interlaced content).

Compare and look for smoother and/or sharper motion of bright objects.
If the motion interpolation is too agressive, artifacts around moving
contours can be irritating.
/Jan

Hey, Jan - - really nice coverage of the range of backlighting from CCFL to
local dimming! Thanks for taking the trouble to be logical and thorough - -
very helpful.

The dog from that film you saw wrote:

"Vet" wrote in message
...
I am going to buy a new TV set.I need to know if the LED are better
than LCD? What is the pros and cons?.Also is 220 hertz better then 120
hertz?.
Thanks for any input as I am not up to the new technology.





the LED sets are in fact lcds as well - it's just that instead of using
flourescent tubes to light the screen they use LEDs.
in theory they can be better - they can illuminate only the parts of the
screen that need it. leaving the black bits as black instead of dark
grey, but some don't do that so your only gain is in power saving.

true LED sets - OLEDs - organic leds, are still some way off - you'll
pay 11 thousand dollars for a 10 inch set that isnt even HD.

the LED backlit sets cost more so you need to see both in action to
decide if you want to pay the extra.




CCFL last 5-10 yrs; LED backlit will work 'forever' ... even if
something goes, it might just be a single pixel backlight, or in the
worse case a row (or column or a block) but if the Hi-V for the CCFL
goes you have an all black screen.

RickMerrill wrote:

The dog from that film you saw wrote:

"Vet" wrote in message
...
I am going to buy a new TV set.I need to know if the LED are better
than LCD? What is the pros and cons?.Also is 220 hertz better then 120
hertz?.
Thanks for any input as I am not up to the new technology.





the LED sets are in fact lcds as well - it's just that instead of using
flourescent tubes to light the screen they use LEDs.
in theory they can be better - they can illuminate only the parts of the
screen that need it. leaving the black bits as black instead of dark
grey, but some don't do that so your only gain is in power saving.

true LED sets - OLEDs - organic leds, are still some way off - you'll
pay 11 thousand dollars for a 10 inch set that isnt even HD.

the LED backlit sets cost more so you need to see both in action to
decide if you want to pay the extra.




CCFL last 5-10 yrs; LED backlit will work 'forever' ... even if
something goes, it might just be a single pixel backlight, or in the
worse case a row (or column or a block) but if the Hi-V for the CCFL
goes you have an all black screen.

I think if the past 20 years are anything to go by and if you've had
the set for 10 years it most likely will be replaced as a technology
upgrade.

"Mutley" wrote in message
...



CCFL last 5-10 yrs; LED backlit will work 'forever' ... even if
something goes, it might just be a single pixel backlight, or in the
worse case a row (or column or a block) but if the Hi-V for the CCFL
goes you have an all black screen.

I think if the past 20 years are anything to go by and if you've had
the set for 10 years it most likely will be replaced as a technology
upgrade.




some of us are such tv freaks we look forward to the time when we ' have '
to get a new tv!



--
Gareth.

that fly...... is your magic wand....
http://dsbdsb.mybrute.com
you fight better when you have a bear!

Mutley wrote:
RickMerrill wrote:

The dog from that film you saw wrote:
"Vet" wrote in message
...
I am going to buy a new TV set.I need to know if the LED are better
than LCD? What is the pros and cons?.Also is 220 hertz better then 120
hertz?.
Thanks for any input as I am not up to the new technology.




the LED sets are in fact lcds as well - it's just that instead of using
flourescent tubes to light the screen they use LEDs.
in theory they can be better - they can illuminate only the parts of the
screen that need it. leaving the black bits as black instead of dark
grey, but some don't do that so your only gain is in power saving.

true LED sets - OLEDs - organic leds, are still some way off - you'll
pay 11 thousand dollars for a 10 inch set that isnt even HD.

the LED backlit sets cost more so you need to see both in action to
decide if you want to pay the extra.



CCFL last 5-10 yrs; LED backlit will work 'forever' ... even if
something goes, it might just be a single pixel backlight, or in the
worse case a row (or column or a block) but if the Hi-V for the CCFL
goes you have an all black screen.

I think if the past 20 years are anything to go by and if you've had
the set for 10 years it most likely will be replaced as a technology
upgrade.

My 30 year old Sony TV is still going strong; most current TV content
doesn't merit anything better, anyway.