off group question
Al-hphdx
does not belong here.
Can anyone point me to a newsgroup about TV form factors?
I have been unable to find any groups that discusses LCDs, plasmas, or LED
TVs.
Thanks,
AL
Paul
Try a private forum. Even without asking questions here, and just
searching this site, you can find info.
http://www.avsforum.com/avs-vb/
If you need a search engine, that will search a specific site, try this.
Set domain to "avsforum.com" and do your search.
http://www.altavista.com/web/adv
Paul
Dave C.
This is as good a place as any. There is very little difference
between a TV and a computer monitor anymore. In fact, they are pretty
much interchangeable. I know we could use our large LCD HDTV as a
computer monitor if we wanted to. What are your questions? -Dave
Agent_C
wrote:
>Can anyone point me to a newsgroup about TV form factors?
Not sure what you mean by "TV form factors" but this site may be
useful:
http://tvcalculator.com/index.html?32f0ca8c3c3af0ed2993aac5f8b88b73
A_C
Al-hphdx
We are about to buy our first flat screed TV. So far, I've leared there are
3 types: LCD, Plasma, and LED. I read that up to 40" there is no advantage
to 1020p. I would like to know if that is true. Also I read that plasmas
use more electric that LCDs and don't come into their own until about the
45" size. LED's use less elec, but cost a lot more.
I wound up thinking for us, couch to TV about 10 feet, a 40" 720p LCD would
fill the bill. The off angle thing isn't of concern becuase it is stright
line viewing. I was hoping to find a newsgroup where I might find out if
I'm off base or not.
Thanks,
Al
"Dave C." <no...@nohow.never> wrote in message
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Al-hphdx
"Paul" <nos...@needed.com> wrote in message
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Al-hphdx
I was trying to think of a way to express LCD vs Plasma vs LED
and form factor was all I could think of.
al
"Agent_C" <agent-c-h...@nyc.rr.com> wrote in message
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Paul
> thanks for the tip.
If you just need a quick article to read, try this.
http://www.crutchfield.com/S-d5tTJsY0hxL/learn/learningcenter/home/tv_flatpanel.html
LCD TVs can be backlit by CCFL (fluorescent tubes) or by LED (light emitting diodes).
The LED can be modulated for light level, over a wider range than the CCFL, which
allows a LED backlit device to "fake" a wider dynamic range of light level. The
LED can be pulse width modulated as thin as you want, because there is no gas to
keep in a conducting state. But LEDs can also cost more (and it is unclear to me
whether it has to be this way or not, or whether that is just a marketing thing).
Large LEDs can be expensive, but they may not be using large LEDs inside the set
for this. They may be using many smaller LEDs.
Some people at least, look at the "black" level of a set, as a measure of
quality. And really, the best way to tell if you're going to be satisfied,
is to see a set for yourself. If a friend tells you a set looks good,
it may look good to them, but not to you. Go some place like a Sony store,
and see what is available, what the contrast ratio is like and so on.
I have some stores in my area, that have a "Home Theatre" room in the back, and you
may have better viewing conditions there, than in a store with bright
fluorescent overhead lighting.
All large TVs burn up power. It's just some of them that use even more than
is reasonable for a TV set. A large LCD screen with CCFL backlights, may still
need a few hundred watts. The power to create that amount of light, has
to come from somewhere.
Paul
Stephen
a flock of green cheek conures squawk out:
alt.tv.tech.hdtv would be the closest one.
--
Stephen
Drive defensively. Buy a tank.
geoff
university. They recently had a class that covered flat screen/digital TVs.
There are basically three types:
1. Digital Light Processer (DLP) - A TV that uses micro mirrors that
reflect colors.
2. LCD - Same as your computer monitor.
3. Gas Plasma - Chambers of gas that when excited, produce color.
For large TVs, manufacturers went with DLP or gas plasma because often LCDs
had dead pixels, and potentially for large TVs, LCD panels would have to be
thrown away (too many dead pixels). However, manufacturing of LCD panels is
much better and the industry is moving towards LCD for all TVs (according to
this instructor).
The instructor pointed out that one can achieve true cinematic quality with
gas plasma because GP has true black. When none of the gas chambers are
excited, no light is emmitted.
The other thing to look at is resolution. Large TVs are 1920x1080 but
smaller ones (under 40") are 1080x720.
--g
Dave C.
"Al-hphdx" <bo...@nowhere.org> wrote:
> Thanks for the replies,
> We are about to buy our first flat screed TV. So far, I've leared
> there are 3 types: LCD, Plasma, and LED.
There's a fourth type. LED is still future tech, AFAIK (see OLED). The
four types I'm aware of are:
1) LCD with fluorescent backlight
2) LCD with LED backlight
3) OLED (might or might not become common...some speculate that LED
backlight LCDs will make OLED obsolete before it becomes -widely-
available)
4) Plasma
The best of all the available technologies is LCD with LED backlight.
The best VALUE of the available technologies (for the moment) is LCD
with fluorescent backlight. Meaning, you can get a reasonably sized
screen with excellent resolution and picture quality, fairly cheaply,
if you go LCD with fluorescent backlight.
Within a couple of years, I think it's likely that all TVs will be
LCD with LED backlight. It has the potential to be the cheapest,
easiest to produce, offer the best picture quality (in technology
with good long-term reliability, anyway) and consumes the least
amount of electricity.
Plasma? That was obsolete a couple of years ago. Can you get good
picture quality? Yes. But it's only good for very dimly lit rooms.
And at best, it won't last as long as an LCD. It's also getting hard
to find. The few plasmas left on the retail shelves already have LCD
models (many with LED backlights) lined up to replace them.
> I read that up to 40"
> there is no advantage to 1020p.
You mean 1080P. I'd say that's true. If you're looking at 40" or
under, 720P is fine.
I would like to know if that is
> true. Also I read that plasmas use more electric that LCDs and don't
> come into their own until about the 45" size.
They all use about the same amount of electricity, unless you are
talking about an LCD with LED backlight. That technology uses less
electricity.
> LED's use less elec,
There may be a few true LED TVs on the market. But I imagine the price
is not worth considering, yet.
> but cost a lot more. I wound up thinking for us, couch to TV about 10
> feet, a 40" 720p LCD would fill the bill.
That sounds about right. A true home theater would require a much
larger screen. But 40" is definitely a good size for a 10' viewing
distance. Sometimes I think the home theater recommendations are set
by the TV manufacturers. Last I checked, 10' viewing distance would be
recommended screen size of like 80" diagonal...or something just as
ridiculous. But really, 40" is fine for 10' viewing.
> The off angle thing isn't
> of concern becuase it is stright line viewing. I was hoping to find
> a newsgroup where I might find out if I'm off base or not.
> Thanks,
> Al
No, it sounds like you have done your research well. Based on what you
wrote, I would recommend a 40-42" 720P or 1080P LCD TV with fluorescent
backlight. I say 40-42" as these sets are often in the same price
range. In fact, you might find a 42" set cheaper than some 40" sets.
I recommend a 1080P for the same reason. 720P is fine, but 1080P is
so much in demand that it's becoming more common...and thus, you might
find a 1080P set cheaper than a 720P set.
Oh, and don't fall for the trap of paying extra for more hertz. A 60Hz
set is more than you need. Some manufacturers are bragging about 120Hz
or even 240Hz refresh rates. Most full HD content is not even recorded
at 60Hz yet. By the time 60Hz HD source becomes common, any TV you buy
in the next year or two will be worn out. And the replacement will only
need 60Hz capability to display then-common HD content.
Or put another way, a 240Hz set is capable of refreshing the picture
four times as fast as any current or known future source can supply it
with content to refresh with. Consequently, you won't get a better
picture at 240Hz than you will at 60Hz refresh rate. So why pay for
it? -Dave
Al-hphdx
"Stephen" <y...@its.invalid> wrote in message
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Al-hphdx
Thank you very much for your thoughtful and comprehensive answers to my
questions.
Al
"Dave C." <no...@nohow.never> wrote in message
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