Re: Polarizing Eyeglasses

In article <1133562701.3969@athnrd02>,
"Ioannis" <morpheus@xxxxxxxxxxxx> wrote:

>
> Sounds reasonable. On my way back to Athens from Crete, upon entering the
> new main airport hall to pick up my baggage, i was surprised that all the
> flat panel displays showing arrivals and baggage lanes were completely dark
> for some reason.
>
> I accidentally tilted my head as I was walking by, and noticed a slight
> light. The culprit was my clip-on polarizing pair, whose polarizing plane
> was apparently exactly vertical to that of the displays'.
>
> Same thing happens with my laptop's LCD screen.
>

I've used an expensive Sun 19" LCD as an external monitor on my Mac
laptop for several years. When it first arrived, I hooked it up; turned
it on; went thru all the settings; it worked beautifully. Went outside
in the sun, came back in 20 minutes, it had gone all to hell -- laptop's
own display still fine, video mirrored display on the monitor a muddy
brown mess. Turned everything off and back on; went through all the
settings again, monitor and laptop; nothing helped. Thought, "Oh, hell
-- infant mortality".

Then I took off the polarizing sunglasses I'd put on when I went
outside . . .

Subsequently talked with the Sun product manager for the monitor about
the observation; they'd never even thought about it. Have since noticed
that the LCD credit card swipe-and-sign gadgets in some 7/11s have the
same problem. Mac laptops are polarized at 45 degrees; you don't even
notice the 3 dB difference in brightness between sunglasses and no
sunglasses.
.

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