The "New Toys" Thread

My2ndProject

Active Member
Joined
Jul 9, 2008
Messages
136
Location
Chicago/IL
Car(s)
B5 Audi S4

Buba

Wants Rick Astley's Babies
Joined
Nov 12, 2004
Messages
7,088
Location
Rottal-Inn
Car(s)
BMW M235i
...that is produced artificially via dimming the back lighting, which sucks if you watch a movie that has lots of change in bright/dark parts...
 

Hercules286

Well-Known Member
Joined
Feb 12, 2007
Messages
1,663
Location
Sofia, Bulgaria
...that is produced artificially via dimming the back lighting, which sucks if you watch a movie that has lots of change in bright/dark parts...

Can you give an example? I can't think of a movie like that offhand, and I want to see what you're talking about.
 

IceBone

Blue Wheel Hipster
Joined
Jan 14, 2007
Messages
27,218
Location
Slovenistan
Car(s)
Audi A5 Quattro
Dimming the backlight would lower the contrast, making the backlight brighter and increasing the quality of the polarising filters raises the contrast.
 

klankymen

BLT Master
Joined
Jun 3, 2008
Messages
3,298
Location
M?nchen, K?nigreich Bayern
Car(s)
plastic Japanese iPod dock on wheels
it's only dimmed locally, hence increasing the contrast, but only between larger regions, since you can't dimm each pixel individually.
 

MXM

I paid for this title
Joined
Jun 9, 2004
Messages
5,623
Location
Finland
Contrast is a ratio of brightest and darkest pixel.
With backlight all the way down, pixels can't get very bright.
With backlight up, pixels can't get very dark.
Half-assed solution: dynamically change the backlight depending on what's displayed. So instantaneously the high contrast is not achievable, but dynamically it's possible, and doesn't look good anywhere but in a spec sheet imho.
 

Buba

Wants Rick Astley's Babies
Joined
Nov 12, 2004
Messages
7,088
Location
Rottal-Inn
Car(s)
BMW M235i
^ Same thoughts here... Some friends of mine have that on their Samsungs, and most have turned it off, because it simply take a little bit of time when the picture gets dark for the backlight to go down. Maybe LED backlight screens will be better?

Or simply get a really good Plasma if you wanna brag about contrast ratio...
 

klankymen

BLT Master
Joined
Jun 3, 2008
Messages
3,298
Location
M?nchen, K?nigreich Bayern
Car(s)
plastic Japanese iPod dock on wheels
I read somewhere that the human eye can not distinguish contrasts over 700:1 anyway.
 

NecroJoe

Stool Chef
Joined
Apr 12, 2005
Messages
22,182
Location
San Francisco area, CA, USA
Car(s)
2015 Mazda 3 S GT, 2015 VW e-Golf
I read somewhere that the human eye can not distinguish contrasts over 700:1 anyway.

Hmm...i'm gonna say "link, or it's not true" because I think I can absolutely notice much higher ratios.

Buba: I believe LED-lit monitors can do better, but still not perfect.

A typical backlit LCD screen is always lit, and the black areas you see are the LCD overlay trying to block the light from getting through. The darkness of the black is where LCD's typically fail. They can do white, but they can't get a very black-black. An LED-lit screen can turn off much much much finer-detailed areas of lighting to aid in creating absolute-black, since there's no light...not just a dimmed vague area of the screen.
 

klankymen

BLT Master
Joined
Jun 3, 2008
Messages
3,298
Location
M?nchen, K?nigreich Bayern
Car(s)
plastic Japanese iPod dock on wheels
NecroJoe, I read it on another forum for HDTVs, so linking that wouldn't provide much in the way of scientific evidence. Maybe google can turn something up.
 

CyberMonkey

Well-Known Member
Joined
Jan 22, 2005
Messages
2,068
Location
Belgium
Maybe because of the way it's measured... Between colours, between shades of gray, etc

All I know is my monitor claims to be 1000:1 and the black isn't black at all.
 

tloekke

Well-Known Member
Joined
Feb 4, 2005
Messages
571
Location
Oslo, Norway
Car(s)
Honda CR-V
Is there something I'm missing here?

Why would you need a television set capable of showing a 20 000:1 contrast ratio when modern film emulsion (which is still the one source with most dynamic range) only can capture a range of 10 stops which is 1024:1?
 

tloekke

Well-Known Member
Joined
Feb 4, 2005
Messages
571
Location
Oslo, Norway
Car(s)
Honda CR-V
Well, it's basically what I said. As far as I know, there is no recording medium that can record more than about 1024:1 in contrast ratio, consumer video cameras are at best 32:1 (5 stops on the aperture), professional video cameras somewhere in between. On either side of that scale, there would just be pure black and pure white, no details

I also doubt that broadcasting standards allow showing a contrast rate as high as 20 000:1.

So unless there are video games that have 20 000:1 contrast range, I can't fathom why you would need a television set capable of showing that kind of dynamic range. I either smell a marketing ploy or they've just created technology that no one really needs....
 

NecroJoe

Stool Chef
Joined
Apr 12, 2005
Messages
22,182
Location
San Francisco area, CA, USA
Car(s)
2015 Mazda 3 S GT, 2015 VW e-Golf
I think it's maybe just different vocabulary, similar to the 1,000MB=1GB vs 1,024MB=1GB.

I can't tell you what the numbers really mean, but look at two TVs side-by-side with the same specs but different contrast, and it seems noticeable.
 

Labcoatguy

Forum Addict
Joined
Mar 27, 2005
Messages
14,071
Location
New England region, USA
Car(s)
#Jaguar #XKR #XJR, #Saab #9-3 #9-5
IMG_8985.JPG

Lenovo Thinkpad R61i, sitting on top of the IBM Thinkpad T40 (probably made in the same factory) that it's replacing. I can now say for certain that the brick shithouse Thinkpad era is long over. Build quality and little niggles on this thing are more noticeable than they should be, though still better than most Dells or HPs. Then again, it's a cheap new laptop with WinXP, so I'm mostly happy; so long as I don't grab the sides of the display for any reason, I won't notice the floppy plastics.

IMG_8984.JPG

Epiphone Les Paul '57 Goldtop reissue. I've already annoyed the neighbors with it while plugged into a very nondescript Crate practice amp. P-90s are epic.

Oh, and looky, I got myself another MR2!
IMG_8980.JPG
 
Last edited:
Top