50Hz or 100Hz
 

In a previous thread:

"Mat Overton"
wrote in message news:qyNye.119885$

I get a lot of shocked reactions when I tell customers not to buy a 100Hz
TV.

Well, I've gotta disagree here! If I watch my 36" CRT telly in 50Hz I find
the screen refresh flicker unbearable. At 100Hz it's invisible.

This is clearly a personal thing - for instance my mother can't see a 50Hz
flicker, but for me it's a real problem.

So I think you should invite your customers to look at both and decide for
themselves! :-)

Steve

"Staiger" wrote in message
...

So I think you should invite your customers to look at both and decide for
themselves! :-)

Steve

Good advice.
However, I do get the impression that the latest 100Hz TVs are better than
the first examples which seemed to produce some weird effects, and I
certainly was dead against anything labelled 100Hz. Now, I'd be prepared to
give them a go.

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

On Wed, 6 Jul 2005 10:14:45 +0000 (UTC), "Staiger"
wrote:

This is clearly a personal thing - for instance my mother can't see
a 50Hz flicker, but for me it's a real problem.

I can see 75 Hz flicker, but 85 Hz flicker is OK (I think).

"Ken" wrote in message
...
On Wed, 6 Jul 2005 10:14:45 +0000 (UTC), "Staiger"
wrote:

This is clearly a personal thing - for instance my mother can't see
a 50Hz flicker, but for me it's a real problem.

I can see 75 Hz flicker, but 85 Hz flicker is OK (I think).

Same goes for me.

In article ,
Staiger wrote:
Well, I've gotta disagree here! If I watch my 36" CRT telly in 50Hz I
find the screen refresh flicker unbearable. At 100Hz it's invisible.

They might use shorter persistence phosphors than a 'standard' set.

This is clearly a personal thing - for instance my mother can't see a
50Hz flicker, but for me it's a real problem.

It does vary.

So I think you should invite your customers to look at both and decide
for themselves! :-)

Some will find the artifacts caused by the conversion annoying too.

--
*I'll try being nicer if you'll try being smarter

Dave Plowman London SW
To e-mail, change noise into sound.

"Agamemnon" wrote in message
...

"Ken" wrote in message
...
On Wed, 6 Jul 2005 10:14:45 +0000 (UTC), "Staiger"
wrote:

This is clearly a personal thing - for instance my mother can't see
a 50Hz flicker, but for me it's a real problem.

I can see 75 Hz flicker, but 85 Hz flicker is OK (I think).

Same goes for me.

Ditto. Doing office IT support is quite revealing as to how many people can
use a CRT monitor at 60hz and not even notice there's a problem when to me
the thing is flashing like a strobe, i.e. painful to look at. The
sensitivity to this across a range of people in the average office is quite
varied.

Paul

"Paul" wrote in message
...

Ditto. Doing office IT support is quite revealing as to how many people
can
use a CRT monitor at 60hz and not even notice there's a problem when to me
the thing is flashing like a strobe, i.e. painful to look at. The
sensitivity to this across a range of people in the average office is
quite
varied.

Paul

Swiss academics about 15-20 years ago found that some people were sensitive
to around 90-100Hz screen flicker. As I've now been retired for a few
years, I no longer have access to their report, sorry.

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

On Thu, 7 Jul 2005 13:44:40 +0100, "Malcolm Stewart"
wrote:

Swiss academics about 15-20 years ago found that some people
were sensitive to around 90-100Hz screen flicker.

100Hz on TV would be a good choice. I have 85Hz on my PC monitor
(CRT) and I think I can sometimes feel some minor flicker under
some light circumstances. 50Hz on TV is horrible for me.

"Paul" wrote in message
...
"Agamemnon" wrote in message

Ditto. Doing office IT support is quite revealing as to how many people
can use a CRT monitor at 60hz and not even notice there's a problem when
to me the thing is flashing like a strobe, i.e. painful to look at. The
sensitivity to this across a range of people in the average office is
quite varied.

Have you asked them whether they can see it flicker and whether they find it
annoying? They might not realise that it can be corrected easily in most
cases.

--
Max Demian

"Max Demian" wrote in message
...
"Paul" wrote in message
...
"Agamemnon" wrote in message

Ditto. Doing office IT support is quite revealing as to how many people
can use a CRT monitor at 60hz and not even notice there's a problem when
to me the thing is flashing like a strobe, i.e. painful to look at. The
sensitivity to this across a range of people in the average office is
quite varied.

Have you asked them whether they can see it flicker and whether they find
it annoying? They might not realise that it can be corrected easily in
most cases.

The answer is an emphatic yes to the question "have you asked them whether
they can see it flicker", as in yes I did ask them, always because it hurt
me so much to look at it. In fact in every case I can remember the first
thing I did was to alter the setting because I could not do my work on such
a monitor. But I would often find that prior to my visit they hadn't
noticed a problem and it didn't bother them. In some cases however, it had
bothered them but they hadn't reported it or tried to alter it.

Please bear in mind that in many office environments, the desktop settings
panel is barred from the user by group policies in force. No, I was never
in control of these policies but they could often only be altered by logging
in as Administrator.

Paul