[mythtv-users] OT: Buying a new TV - Sharp Quattron or 3D?

[John Pilkington]

On 09/06/11 07:25, Phil Wild wrote:
>
>
>     Except shutter glasses ARE polarized glasses.  They're nothing more than
>     tiny LCD screens.  Your LCD screen works by having two polarized
>     filters, one static, one dynamic.  Light passes through the static
>     filter and becomes polarized.  The dynamic filter can adjust plane, and
>     depending on the angle, determines how much light comes through.
>
>     With passive glasses, you have two linear filters at perpendicular
>     angles.  Each will only allow the in-plane light through.  With active
>     glasses, you have a static filter, which must be in the same plane as
>     that in the TV, and another dynamic filter which flips between the two
>     maximums to allow or block light.  So, any deficiencies that may exist
>     with passive glasses MUST exist with active glasses.
>     _______________________________________________
>
>
> Are you sure?
>
> When I used to work at SGI, the shutter glasses we used would black out
> the left eye, followed by the right eye synchronised with the refresh
> rate of the monitor (usually running at 120Hz). There was an infra-red
> emitter placed on top of the screen to synchronise the shutter glasses.
> So full resolution at half the perceived frame rate.
>
> I was under the impression that this is how the 3D TV worked in that the
> odd and even frames were left and right eye and the glasses made sure
> the correct eye viewed the correct frames. One eye seeing black while
> the other eye viewed the image would mean that your brain perceived the
> image as 50% brightness as well.
>
> Cheers
>
> Phil
>
See the links that I posted earlier in this thread - part quote below. 
Different images can be fed to each eye either in sequence, by active 
goggles, or by passive goggles that transmit orthogonal optical 
polarisations.  As Ray says, both methods rely on polarization. Or you 
could use independent displays for each eye.

> All passive 3D sets that have been released are LED lit LCDs and use what is called FPR technology or “Film Pattern Retarder”. This is a thin film place over the LCD screen which creates a separate image for the left and right eyes. It achieves this by using alternate polarization for each line of vertical resolution. So 540 lines are sent to the right eye and 540 lines are sent to the left. The lenses of the glasses use opposite circular polarization so that each eye receives the correct lines of linear resolution.

The loss of resolution with the passive kind relates only to the screen 
properties.  Anyone got a 1920 * 2160  16:9 panel with an FPR overlay?

John P