Are There Any 1366 x 768 Plasma 42" TVs

Archived from groups: alt.tv.tech.hdtv (More info?)

Does anyone build a plasma HDTV with 1366 x 768 resolution in a 42"
size.
pestoblue

Archived from groups: alt.tv.tech.hdtv (More info?)

"afiggatt" <afiggatt@adelphia.net> wrote in message
newsMGdnTFe7ue91KreRVn-gg@adelphia.com...
>>>I would not worry about it too much, a 1024x768 plasma looks
>>>pretty good.

No it doesn't look good! Your loosing more than 2/3 of the picture!

1024 x 768 = 786432

vs.

1920 x 1080 = 2073600


Paul A. Jacobi
p dot jacobi at comcast dot net

Archived from groups: alt.tv.tech.hdtv (More info?)

On Sun, 25 Sep 2005 23:58:52 -0400, afiggatt <afiggatt@adelphia.net>
wrote:

>Paul A. Jacobi wrote:
>> "afiggatt" <afiggatt@adelphia.net> wrote in message
>> newsMGdnTFe7ue91KreRVn-gg@adelphia.com...
>>
>>>>>I would not worry about it too much, a 1024x768 plasma looks
>>>>>pretty good.
>>
>> No it doesn't look good! Your loosing more than 2/3 of the picture!
>>
>> 1024 x 768 = 786432
>>
>> vs.
>>
>> 1920 x 1080 = 2073600
>>
>> Paul A. Jacobi
>> p dot jacobi at comcast dot net
>
> Yes and no. The max angular resolution of the human eye is generally
>given as 1 arc minute for someone with 20/20 eyesight. Figure out what
>the viewing angle of a 42" 16:9 widescreen TV is in arc minutes at a
>sitting distance of, say 10 feet. Start with the numbers: screen height
>= 20.6" (0.49 * diagonal), screen width = 36.6" (0.872 * diagonal).
>
> Do a little trig for the viewing angle at a distance of 120" (10 feet)

[metric ON]
1) PIXEL Size
The conclusion I come to is that given the 3 meter viewing distance I
would like to have somewhat smaller pixels than a 1024x768 42" panel
gives.

The "1 arc minute rule" corresponds very well to my experience with my
smaller LCD panel.

My panel has a pixel pitch of 0.5mm x 0.5 mm. I can resolve the pixels
from somewhere around 2m. (Visible at 1.5m but not at 2.5m).
To have a smooth and natural picture you should not be able to resolve
the pixels, expecially in a flatpanel with sharp pixels.

1 arc minute at 3 meter (10 feet) is about 0.9mm.

1024 horizontal pixels in a 42" panel gives a pitch of 0.9mm, so to be
sure , I would think a viewing distance of minimum 3.6m (12 feet) is
more appropriate.

1366x768 42" panel has a pixel pitch of 0.6mm, so it would allow a
shorter distance.

2) The next issue is the image processing that is needed to convert an
incoming signal to fit the flat panel. A system with pixel mapping 1:1
and no conversion between frame rates (like interlace/progressive etc)
would avoid some of the artifacts from this conversion that are
otherwise visible with certain material.
This seems like an impossible wish at the moment with several used
transmitted formats.

>and figure out how many arc minutes that works out to. You may be
>surprised.
Not really
/Jan