LCD, DLP, Plasma -- cant they do blacks?
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Posted by on August 28, 2006, 4:04 pm
Please log in for more thread options hello, i am interesting in purchasing a HD tv for the primary purpose of wathing movies. currently movies on DVD (netflix, etc), but eventually HD discs as well. dont really care about broadcast tv. 300 channels of crap. :) anyway, im testing out some models (right now i have a 42" Samsung DLP). however the common thing i see in them is -- they cant make "black". they can make "darker", but its never the true black im used to from CRTs. this is likely because when a crt's proton gun isnt sending protons to the glass tube, it remains off (true black). but in these new sets, which are bulb-lit, they can evidently only attempt to mask the light from certain pixel areas. this is imperfect and produces a luminscent blue-black. i see this on computer LCDs as well, but their contrast ratios are much less than the 3,000-8,000:1 ratios home theater LCD & plasma. anyway... can anyone help set my expectation -- can anything produce actual or near-CRT blacks? or will i be disappointed w/ each technology & brand, because none of them are as dark as a CRT? also, im still looking at marketing material, but any idea what a typical DLP contrast ratio is? thanks! matt | |||||||||||||
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Posted by on August 28, 2006, 4:08 pm
Please log in for more thread options oh, and replace "proton" w/ "photon" or whatever it is that makes these things work... :) matt | |||||||||||||
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Posted by Rick on August 28, 2006, 5:14 pm
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Yes nothing is as black as a CRT. Also, contrast ratios that are reported are based on different methods so you cannot use them to compare one manufacturers to another. Got to see in person and lighting levels in stores are too bright. Plasmas should be darker then LCDs. I am not sure about DLPs. | |||||||||||||
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Posted by G-squared on August 29, 2006, 1:11 am
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Rick wrote: > Yes nothing is as black as a CRT. Also, contrast ratios that are
reported
> are based on different methods so you cannot use them to compare one
> manufacturers to another.
> Got to see in person and lighting levels in stores are too bright. > > Plasmas should be darker then LCDs. I am not sure about DLPs. > When we got the DLP Christmas '03 I was very disappointed in the black level performance. After going to work the next Monday and bemoaning the blacks, I was all set to be unhappy - but in fact, I like it. When Jay Leno came on with his almost black suit, I was unhappy - until I noticed the shadows his arm was casting on his torso. I didn't THINK I was crushing the blacks on the old set but... The ambient light level will have a big impact on the perceived black level. The black looks much better with some background lights on and the same is true of a CRT. The apparent gamma changes with ambient as well. Worst case viewing is a totally dark room. SED will be neat if / when it shows up but I'm happy at present. And you're right about contrast ratio numbers. If you can't duplicate a measurement, it means essentially nothing. GG | |||||||||||||
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Posted by on August 29, 2006, 11:10 am
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G-squared wrote: > When we got the DLP Christmas '03 I was very disappointed in the black
> level performance. After going to work the next Monday and bemoaning > the blacks, I was all set to be unhappy - but in fact, I like it. When not following you. why were you disappointed on first viewing, but then..not? > The ambient light level will have a big impact on the perceived black
good to know. i was in a dark room, as is customary when we watch movies. i suppose i could try it w/ a light on. is this why philips sells that rear "ambi-light" flat panel? > level. The black looks much better with some background lights on and
> the same is true of a CRT. ...not sure about this. w/ my CRT i always watched movies in a darkened room, and they were true black -- not electrons hitting the glass. never noticed anything disappointing. matt | |||||||||||||
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>
> i am interesting in purchasing a HD tv for the primary purpose of
> wathing movies. currently movies on DVD (netflix, etc), but eventually
> HD discs as well. dont really care about broadcast tv. 300 channels of
> crap. :)
>
> anyway, im testing out some models (right now i have a 42" Samsung
> DLP). however the common thing i see in them is -- they cant make
> "black". they can make "darker", but its never the true black im used
> to from CRTs.
>
> this is likely because when a crt's proton gun isnt sending protons to
> the glass tube, it remains off (true black). but in these new sets,
> which are bulb-lit, they can evidently only attempt to mask the light
> from certain pixel areas. this is imperfect and produces a luminscent
> blue-black. i see this on computer LCDs as well, but their contrast
> ratios are much less than the 3,000-8,000:1 ratios home theater LCD &
> plasma.
>
> anyway... can anyone help set my expectation -- can anything produce
> actual or near-CRT blacks? or will i be disappointed w/ each technology
> & brand, because none of them are as dark as a CRT?
>
> also, im still looking at marketing material, but any idea what a
> typical DLP contrast ratio is?
>
>
> thanks!
> matt
>