|
||||||||
Contrast ratio |
![]() |
|
|
Thread Tools | Search this Thread |
|
|
#1 |
|
Guest
Join Date: Mar 2000
Posts: 62,990
|
Contrast ratio
other than the headline specs, this is one that is worth looking at, to get your absolute blacks instead of shades of black etc
not really in the market to buy one just yet, but was having a look in our shiny new sony centre, and most of the bravia's were 25,000:1 or 33,000:1 with the W series and up 50,000:1. having thought the panasonic vieras were broadly comparable, i looked at them, and they were typically only 10,000:1. are there two different figures here, as that seems like a huge difference? Iain |
|
|
|
|
Please sign in or register to remove this advertisement.
|
|
|
#2 |
|
Forum Member
Join Date: Sep 2004
Posts: 14,718
|
It's measured differently by each manufacturer so it's really a pretty meaningless specification.
See the sets and decide which one you prefer is always the best advice. |
|
|
|
|
|
#3 |
|
Forum Member
Join Date: Jan 2004
Location: Newton Abbot, Devon
Posts: 185
|
But are they quoting a 'dynamic' or a 'native' ratio? I just had a quick look in my Panasonic brochure and the TH-46PZ85B, for example (picked a page at random) has a native contrast ratio of 30'000:1, but a 'dynamic' contrast ratio of 1'000'000:1!
|
|
|
|
|
|
#4 |
|
Guest
Join Date: Mar 2000
Posts: 62,990
|
ta. yes - i think sony quote the dynamic ratio.
so by the sounds of it, the dynamic ratio is about 3x the other figure. which, i guess would put the panasonic figure of 10,000:1 at about the same as the 33,000:1 sony figure, with the 50,000:1 being better still. whilst obviously looking at sets is the best thing to do, is there a generally accepted point at which true blacks are considered to be pretty much achieved? Iain |
|
|
|
|
|
#5 |
|
Forum Member
Join Date: Apr 2006
Location: North Derbyshire
Posts: 41,794
|
Quote:
ta. yes - i think sony quote the dynamic ratio.
so by the sounds of it, the dynamic ratio is about 3x the other figure. which, i guess would put the panasonic figure of 10,000:1 at about the same as the 33,000:1 sony figure, with the 50,000:1 being better still. whilst obviously looking at sets is the best thing to do, is there a generally accepted point at which true blacks are considered to be pretty much achieved? But any decent make modern LCD should have really good black level performance (certainly better than my Hitachi Plasma, which isn't great at all). I can tell you that recent Sony LCD's actually reduce the brightness of the back lights on dark scenes, presumably to push the black level spec even further. |
|
|
|
|
|
#6 |
|
Forum Member
Join Date: Jul 2004
Posts: 28,589
|
Hilariously, I have calibrated about 400 sets, and the highest post calibration contrast ratio I have ever seen was on a G8 Kuro Pioneer plasma (by a very short head from a Panasonic pro panel plasma) and that as reorted by the software, was 1220:1. The best LCD I have MEASURED came out at 780:1. How they square this with the gibberish of figures I have no idea at all.
Backlight reduction, yes you get deeper blacks, but of course duller whites. In the real world this doesn't matter as much as all that, as long as a scene is either all dark or all bright. If you have a mix, it's gonna get one of them wrong. |
|
|
|
|
|
#7 |
|
Forum Member
Join Date: Oct 2000
Location: Sussex
Posts: 12,173
|
I suppose the manufacturers use the same method as has been used to measure maximum power output from cheap hifi's, such as making a Matsui crap 'hi-fi' with a real life 2.5w rms per channel being quoted as 500wmpo or whatever stupid theoretical figure they dream up.
It's very annoying that they can quote almost any figure and get away with it..... |
|
|
|
![]() |
|
All times are GMT. The time now is 16:39.

