Those dynamic contrast ratio are basically meaningless. Each manufacturer has their own standard of measurement.

Not like that bro, still need to wait. Maybe new technology after LEDTV will better or cheaper...

Plasma come out before LCDTV but LCDTV more cheaper and popular now.

I still cannot buy Plasma at current price.

No need to buy Plasma already. Plasma is now more or less tar pau-ed and closed shop. But LED is still cheaper than Plasma when it first comes out...i remember prices like RM40k and RM30k for Plasma....

Furthermore, plasma is not suitable for video games, which i suspect is one of the reason contributing it's demises. A lot of people buying an LCD for games and movies and even as secondary/primary display monitor for PCs.

This post has been edited by Matrix: May 5 2009, 10:02 AM

LED backlight TVs have their advantage compared to traditional CCFL backlight LCD TVs. They will have better contrast ratio due to deeper blacks. However, there are still some disadvantages that people should be aware of. Non local dimming LED backlighting has still has problems with inability to display total black. As such, the contrast ratios are not that great. Not important when viewing in brightly lit rooms, but if you like to watch your movies in the dark, then it becomes an irritation. Another source of uncertainty, is the lifetime of the LED backlight. This needs more studies and possibly improvement. There are 2 kinds of LED backlighting. Samsung & LG uses white LEDs and Sony uses tristimulus LED (individual R,G,B). Tristimulus should give better colour accuracy all around. However, the problem is that the half life of the respective RGB LEDs are not the same currently, so something to watch out for.

Local Dimming LEDs are the next best thing. They ability to turn off areas of LED depending of the screen content is what will give plasmas a run for the money. The problem here is that there will be more pixels than LED thus causing smearing/blooming/spillover of local dimming.

I honestly believe that all LCD manufacturers know that at the moment due to the tecnology nature, plasmas give a more accurate representation of how movies are viewed and they are making strides in matching or besting plasma as we go along. The main reason why LED backlighting TVs start lower than when Plasma 1st came out is due to the overall lower cost of manufacturing panels today. Those days the plasma panel yields were extremely low. Now, panel manufacturing costs have dropped tremendously.

Actually, plasma does work for gamers well, just care needs to be taken to reduce burn in.

I really hope that Samsung, Sony and LG continue to work on improving LED backlighting since I think it is a very good improvement in LCD technology. I also hope that the other manufacturers work on the other aspects that need improvement, response time, refresh rates, viewing angle and picture reproduction to enable the movie like feel.

On another note, don't write off plasma just yet. The cost of manufacturing panels are at an all time low now. They have 2 more tricks up their sleeve, namely 5lumens and 10lumens tech. This will allow plasma to catch up on LCD in terms of ultra bright picture content and lower power consumption.

End of the day, the consumer benefits from competition.

That is very infomative on all the LED that manufacture uses. Learn a lot from the post, bro anfieldude.

Can you explain a bit more on this? What does it means "more pixel than LEDs"? Thanks.

Ok. As u know, if u get a Full HD TV, there are 1920 X 1080 pixels (these are divided into sub pixels, Red Green Blue, together they make white). Then there is the backlight. The traditional backlights are horizontally placed behind tthe panel to drive the panel. Pixels are individual pixels that are arranged around the back of the panel. See picture below.



As you can see unless each pixel is backlit by a single LED there is no way there are equal amount of pixels to LED. I believe Sony or Samsung do not state the number of LEDs there are on the backlight. LG claims there are ~ 1500 LEDs in their LED backlighting LCDs. 1500 LEDs to light up an area that has 2 million odd pixels will have the blooming effect that I mentioned and I have seen it on the Samsung A950 series. I have attached link to Cnet's blog explaining this. Oh BTW, I made a mistake with the name of the 3 LED method that Sony uses, it is Triluminous and not Tristimulous. Nice read, check out if interested.

CNET explanation

I have been looking at the 55A950 and have read some good reviews - other than blooming & bad off-center viewing. But I saw it the other day at Best Denki, 1U and was disappointed ... it was displaying high motion Samsung High Def files, but it was very 'grainy' and not sharp at all. The 46A950 did not look so bad.
Wondering if it could have been due to poor calibration e.g. Auto Motion Plus was turned off ?

Also, i noticed that the A950 series is selling more expensive (in US) than the B7000 series (comparing 55" to 55"). But over here, i think the B7000 is more expensive. Anyone can help verify?

A950 shld be cheaper here.B7000 is new & shld retail for $10,900 after discount.B8000 already making it's way next mth.crazy influx of tv's this yr i predict

Sometimes watching in malls cannot justify the PQ of LCD TV's cos settings all not put into consideration.So cannot pass judgement that way..

This post has been edited by ^chalaza^: May 5 2009, 12:49 PM

Very possible, A950 series is local dimming, the new B7000 is not.

I have seen the 55A950 in action and have calibrated it. Looks pretty good to me if u can live with the blooming and the off centre issue.

All your answer can be found here. Click here.

This post has been edited by iTrance: May 5 2009, 07:27 PM

yeah..i looking for 32 in for my bed room...

Why need to open a new one... just post you answer here la....

What are you doing dude?? Start a new thread when one already exist and ask people to go over there? And then point to an EMPTY THREAD WITH ABSOLUTELY NO INFO???

Want to get famous or something??

Noobs.

From the CNET side, for Sony LED backlit, even thought they use RGB LEDs which are muc better than single(white) LED but the amount of LEDs used as seen from the photo are not that many therefore would not be able to perform good local dimming as well.
I have open up Samsung LED backlit LCD, the amount are quite a lot, but not sure got over 1500 LEDs used or not . but i believe they can perform much better local dimming than Sony. But until i get my hand on Sony LED back lit LCD, i cannot really confirm the amount of LEDs used as compared with Samsung. As of now, i don't think i will pay the overly priced Sony LED backlit LCD.
I too have check the blooming effect on Sumsung, my personal view not that visible and when compared to CCFL backlit LCD side by side. CCFL LCD no fight at all.
The life span of LEDs are much longer than CCFL and the production cost for LED back lit LCD is much cheaper than CCFL LCD. however they are sellling it at much higher price now as the performnce is way much better than CCFL, but i believe the price will drop drastically once all LCD maker switch to LED back lit. Therefore for plasma camp side, they are going to have their hand full if they want of resurrect plasma TV.

Cool! You actually pulled the panel apart! Kudos. LED backlight LCDs are a very important step for LCD technology. My only concerns would be the lifetime of the 3 different LEDs compared to each other. The uniformity of the backlight (since it is more individual) is also one of my concerns. The blooming becomes apparent when u pull up test patterns, hence that's why I saw it clearly. The uniformity issues were also seen on the A950 that I calibrated, but still, its performance was much better than any CCFL backlit LCD that I saw. I also noticed that the blooming was not so apparent on the Sony X450.

The actual 0 IRE calibration on the Samsung A950 was 0 (or my probe returned a zero because it was that low!). My probe is not capable of measuring that low. In fact, not many probes can measure that low. So I would put it at 0.001 ft/L. On content however (mixed content), it goes up to 0.1 ft/L or more. I am quoting this from memory since I do not have the numbers with me. If you went farther away from the mixed content the black levels dropped again to below measureable limits. I think they need to further improve the SMART LED algorthims. This is where the technology needs improvement compared to plasmas.

I believe this is the 1st serious step that the LCD camp has taken to improve picture quality and viewing capability to match or best plasma. Time will tell. I hope they continue competing until the the display technology is fully matured. The last thing we would want is that plasma dies before LCD technology is superior!

PS, that picture that was on the CNET site was not a Sony backlight picture.

tumpang tanye..if look NOOB..im sori

tv LED lagi latest dari tc LCD ???

peace

ye lor baru kuar...

wahHHHh..belum setahun pakai lcd,led dah kuar.
so far,dah usha2 led samsung.cam cantik je.
harga pun same cantekkKKK

theorically the LED TV will last longer and brighter than LCD TV, CCFL doesn't last as long as LED, that's confirmed, unless the LED is a faulty unit....

but the problem is, is some of the LED is bad or faulty unit, then will we see a tiny spot become dimmer, if got too much LCD rosak then it will disturb the viewing pleasure