Re: [Phys-l] 240 and 600 Hz

["Dr. Richard Tarara" <rtarara@saintmarys.edu>]

There is also a difference between frame-rate and refresh rate.  The 600 Hz 
is seen in Plasma TV's and is, I assume, primarily about refresh rate rather 
than frame rate.

Rick

----- Original Message ----- 
From: "ludwik kowalski" <kowalskil@mail.montclair.edu>
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Sent: Monday, April 18, 2011 11:00 AM
Subject: Re: [Phys-l] 240 and 600 Hz


> Thank you Rick. Someone also told me that
>
>
> Another thing I learned several days ago was that the signal delivered
> by the cable company has the refreshment rate of 60Hz. Higher
> frequencies are created in TV sets, according to chosen setting.
>
> Ludwik
> ==============
>
>
> On Apr 18, 2011, at 10:34 AM, Dr. Richard Tarara wrote:
>
> > There is signicant blurring of fast motion scenes at the lower refresh
> > rates.  Exactly why we 'see' this on uniquely pixelated screens and
> > not on
> > the older CRT scanned screens, I don't know, but it might be partly
> > due to
> > the fact that most digital TVs now do progressive rather than
> > interlaced
> > scans and just the fact that all the images are sharper to begin with.
> > Blurring of an already blurred image might not be so noticeable.
> >
> > Rick
> >
> > Richard W. Tarara
> > Professor of Physics
> > Saint Mary's College
> > Notre Dame, Indiana
> >
> > *******************************************
> > Free Physics Instructional Software
> > www.saintmarys.edu/~rtarara/software.html
> > New 'Hi-Def' versions being posted as completed.
> > ********************************************
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "ludwik kowalski" <kowalskil@mail.montclair.edu>
> > To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
> > Sent: Thursday, April 14, 2011 4:55 PM
> > Subject: [Phys-l] 240 and 600 Hz
> >
> >
> > > Some new High Definition TV sets  are designed for very high image
> > > refreshment rates, such as 240 Hz and even 600 Hz. This seems to be
> > > unnecessary; the refreshment rate for traditional movies has been 30
> > > Hz. Because of this I think that anything above 60 Hz is just waste
> > > of
> > > money. Do you agree?
> > >
> > > Ludwik
> > >
> > > http://csam.montclair.edu/~kowalski/life/intro.html
> >
> >
> > --------------------------------------------------------------------------------
> >
> >
> > >
> >
> >
> > --------------------------------------------------------------------------------
> >
> >
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>
> Ludwik
>
> http://csam.montclair.edu/~kowalski/life/intro.html


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