Curved is the new flat

On 07/01/2014 08:45, Brian Gaff wrote:
So there we are then, we get rid of space hogging hurnier inducing crts, and
go wafer thin flat screen. Now by all acounts we are going curved screen.
Why? What is the point?

I've not seen one and don't even know what sort of curve we are talking
about, but buth LG and Samsung seem to be tallking up the idea offering
ideas like moor natural viewing, and stuff like that. Is this just another
fad or is there a valid good reason. I can see it now.
man standing beside his burned down house. Fireman saying, it was the
curved screen on your tv, guv, it focussed the sun on a pile of magazines
and whoosh.

Brian



it's a way to differentiate your expensive tv.
not a good one though - i'd want a flat oled if buying one.

--
Gareth.
That fly.... Is your magic wand.

Roderick Stewart wrote:
If it's big enough it shouldn't matter that the curvature is only in
one axis, as that would just concentrate the sun's heat into a line
instead of a point. TV screens are getting bigger all the time, so a
TV screen with an area of about a couple of square metres will soon
become commonplace, and that's about 2kW of solar energy if it's
placed in the sun. Nobody will realise this because it hasn't been a
problem before. If the heat is concentrated into a line instead of a
point, then that will just increase the probability that some of it
will fall on something inflammable. Keep reading the Daily Mail, and
remember you read it here first...

What if the curve is irregular and doesn't focus parallel rays?

Bill

"Brian Gaff" wrote in message
...
So there we are then, we get rid of space hogging hurnier inducing crts,
and go wafer thin flat screen. Now by all acounts we are going curved
screen. Why? What is the point?

apparently, it's more "immersive" (whatever the **** that is!)

tim

"Roger Wilmut" wrote in message
...
In article ,
Jim Lesurf wrote:

In article , David wrote:


"Brian Gaff" wrote in message ...

So there we are then, we get rid of space hogging hurnier inducing
crts,
and go wafer thin flat screen. Now by all acounts we are going curved
screen. Why? What is the point?

There is little point with TVs. Cinema screens were flat, but with the
introduction of wide screens a slight curve was introduced to keep the
throw from the projector the same across the screen, thus minimising
brightness drop-off and distortion at the edges. Only with Cinerama and
Dimension 150 was the screen deep-curved to wrap round the audience and
involve them in the picture by filling their field of vision. Even IMAX
which aims at the same effect only curves the screen by enough to
equalize the throw across it.

With a TV is might look pretty for the person sitting dead centre, but
with a family watching it the people off-access are going to get more
distortion on the side of the screen they are off-axis on. It's a
gimmick.

but it's a gimmick that they want you to blow two grand on

tim

In message , tim......
writes

"Roger Wilmut" wrote in message
...
In article ,
Jim Lesurf wrote:

In article , David wrote:


"Brian Gaff" wrote in message ...

So there we are then, we get rid of space hogging hurnier inducing
crts,
and go wafer thin flat screen. Now by all acounts we are going curved
screen. Why? What is the point?

There is little point with TVs. Cinema screens were flat, but with the
introduction of wide screens a slight curve was introduced to keep the
throw from the projector the same across the screen, thus minimising
brightness drop-off and distortion at the edges. Only with Cinerama and
Dimension 150 was the screen deep-curved to wrap round the audience and
involve them in the picture by filling their field of vision. Even IMAX
which aims at the same effect only curves the screen by enough to
equalize the throw across it.

With a TV is might look pretty for the person sitting dead centre, but
with a family watching it the people off-access are going to get more
distortion on the side of the screen they are off-axis on. It's a
gimmick.

but it's a gimmick that they want you to blow two grand on

The one I saw in John Lewis was a mere £6.5k.
--
Ian

Jim Lesurf wrote:

And are the sensor arrays in the cameras also curved? If not, then a
flat screen may give better apparent geometry when viewed anyway.

Hey, good point. Hadn't thought of that!

--
SteveT

On Tue, 07 Jan 2014 18:51:42 +0000, Bill Wright
wrote:

Roderick Stewart wrote:
If it's big enough it shouldn't matter that the curvature is only in
one axis, as that would just concentrate the sun's heat into a line
instead of a point. TV screens are getting bigger all the time, so a
TV screen with an area of about a couple of square metres will soon
become commonplace, and that's about 2kW of solar energy if it's
placed in the sun. Nobody will realise this because it hasn't been a
problem before. If the heat is concentrated into a line instead of a
point, then that will just increase the probability that some of it
will fall on something inflammable. Keep reading the Daily Mail, and
remember you read it here first...

What if the curve is irregular and doesn't focus parallel rays?

I could be wrong, but I'm assuming the curvature will be fairly
uniform as that's the way cinema screens are curved, and it would look
odd otherwise. This being so, sod's law dictates that sooner or later
somebody will install one of these monsters in exactly the right place
to catch the sun at exactly the time of day where the focus falls on
something that will make its owner regret the purchase in a big way.

Rod.

tim...... wrote:

"Brian Gaff" wrote:

wafer thin flat screen. Now by all acounts we are going curved
screen. Why? What is the point?

apparently, it's more "immersive" (whatever the **** that is!)

Seems to leave some people speechless ...

http://www.youtube.com/watch?v=ptJblPp10zA

Roderick Stewart wrote:

What if the curve is irregular and doesn't focus parallel rays?

I could be wrong, but I'm assuming the curvature will be fairly
uniform as that's the way cinema screens are curved,

Do you know that for a fact? Could it be that some design genius has
figured that a slight variation of radius along the curve works better?

One little thought. Wouldn't the optimum curve be one that presented
every part of the screen at right angles to the viewer's eye? (Note the
position of the apostrophe, which hints at a drawback!) If so, would the
curve also focus parallel rays? Not at the viewer position obviously,
but some other point along the a perpendicular projected out from the
centre of the screen?

What we need is a geometrician.

Bill

On 07/01/2014 16:53, the dog from that film you saw wrote:
On 07/01/2014 08:45, Brian Gaff wrote:
So there we are then, we get rid of space hogging hurnier inducing
crts, and
go wafer thin flat screen. Now by all acounts we are going curved screen.
Why? What is the point?

I've not seen one and don't even know what sort of curve we are talking
about, but buth LG and Samsung seem to be tallking up the idea offering
ideas like moor natural viewing, and stuff like that. Is this just
another
fad or is there a valid good reason. I can see it now.
man standing beside his burned down house. Fireman saying, it was the
curved screen on your tv, guv, it focussed the sun on a pile of magazines
and whoosh.

Brian



it's a way to differentiate your expensive tv.
not a good one though - i'd want a flat oled if buying one.


It wasn't too long ago that we were told curved CRTs were a horrible
distortion of the 'true' image and we should pay more to get them
flattened, now that they're curving the other way they're not distorted?
Remember to buy the optional vertical seating arrangement, so that
everyone can sit centrally in front of the TV.

TV tech has been the emperors new clothes for quite some time, they'll
try anything to keep us buying new TVs. The best one was when they were
able to charge more for TVs that only got wider, whereas previously
bigger TVs got both taller and wider.

Z