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black levels: lcd vs dlp

I

I3eyond

Gawd
Joined
Jan 14, 2006
Messages
937
everyone here complains about the black levels of LCDs...

well, my girlfriend has a DLP and i know first hand how the blacks look.. how does a dlp compare to an LCD?
 
I3eyond said:
everyone here complains about the black levels of LCDs...

well, my girlfriend has a DLP and i know first hand how the blacks look.. how does a dlp compare to an LCD?
Click to expand...
A DLP is superior to an LCD...roughly midway between it and a decent CRT black level (0.01 nits or thereabouts).

Some of the new LCD projectors use a dynamic iris capability to match DLP black levels. It works pretty well, except in scenes where light levels are changing quickly.
 
hmm that's surprising.. her DLP sucks with black levels.. in movies the blacks look green most of the time. another friend of mine has a crt hd tv and the blacks are MUCH better :confused:
 
I3eyond said:
hmm that's surprising.. her DLP sucks with black levels.. in movies the blacks look green most of the time. another friend of mine has a crt hd tv and the blacks are MUCH better :confused:
Click to expand...

Green blacks indicate another problem not related to poor black levels.

I've always heard DLP has much better black levels than LCD as well.
 
mathesar said:
Green blacks indicate another problem not related to poor black levels.

I've always heard DLP has much better black levels than LCD as well.
Click to expand...

hmm .. any idea what that might be?
 
I3eyond said:
hmm .. any idea what that might be?
Click to expand...
All TVs need some calibration out of the box. You could try something like the Avia home theater guide.
 
What brand of DLP does your girlfriend have?
Almost straight across the board DLP's wipe LCD's up when it comes to black levels.
I am curious what brand of DLP she has nonetheless.
 
SNIP3R said:
What brand of DLP does your girlfriend have?
Almost straight across the board DLP's wipe LCD's up when it comes to black levels.
I am curious what brand of DLP she has nonetheless.
Click to expand...

52" Toshiba..
 
Definitely a problem with the set if your black levels are color-tinged, probably an issue with color wheel timing or such. I'd call the manufacturer and try to get it serviced.
 
masher said:
Definitely a problem with the set if your black levels are color-tinged, probably an issue with color wheel timing or such. I'd call the manufacturer and try to get it serviced.
Click to expand...

it was like this even when she got it though... is it likely that it would have come this way?
 
I3eyond said:
it was like this even when she got it though... is it likely that it would have come this way?
Click to expand...
Yep, you can usually calibrate it out, though it may take a tech to do it. Definitely complain to the retailer, or the manufacturer if its been over 30 days.
 
There has always been an issue with dlp's and the color green. Certain Samsung and Panasonic dlp tvs have a 7 instead of 6 segment color wheel. The extra segment is a certain shade of green which helps with the reproduction of the color on those sets. Dlp tvs are known to have better black levels than RP lcds. How much better though depends on what tvs you are comparing. For dlp tvs, it depends on which TI chip is being used. From what I remember, the CR could be from 1000:1 for the HD3 chip to about 2500:1 for the HD2+ chip (greater model # doesn't necessarily mean better). To improve their set's CR, RP lcd manuf. have recently implemented an iris which reduces the brightness of the entire screen, but improves black levels for dark images.
 
From what I remember, the CR could be from 1000:1 for the HD3 chip to about 2500:1 for the HD2+ chip
Click to expand...

The HD3 runs 1500:1 upwards, the HD2+ can go as high as 10,000:1 in high-end equipment.

To improve their set's CR, RP lcd manuf. have recently implemented an iris which reduces the brightness of the entire screen, but improves black levels for dark images.
Click to expand...
This is the dynamic iris mentioned earlier in the thread. It increases the set's on-off CR, but not the ANSI CR, so its a bit of a mixed bag.
 
Masher: you're entirely correct, my bad. The CR in the specs are however, to be taken with a grain of salt (as usual) :)
 
Sparrow_69 said:
Masher: you're entirely correct, my bad. The CR in the specs are however, to be taken with a grain of salt (as usual) :)
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Very true. Still, I haven't seen anything that could touch the CR on the HD2 Darkchip...except SED out there on the horizon, of course.
 
That's true. The Hd2+ TI chip was by far the best, CR wise with no wobulation. I was actually reading a few posts over at avsforums yesterday, and it seems that the 2006 chip dlp tvs don't use backlights or colorwheels. They use colored leds to reproduce the color. This year could be very interesting in terms of dlp technology.
 
Sparrow_69 said:
They use colored leds to reproduce the color. This year could be very interesting in terms of dlp technology.
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Interesting; I missed that particular advancement...probably due to my incessant drooling over SED.
 
masher said:
Interesting; I missed that particular advancement...probably due to my incessant drooling over SED.
Click to expand...

Who, in their right mind, isn't drooling over SED at the moment. :D

It just won't come out quick enough. Oh well, looks like I'll be getting an SXRD. :p
 
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