guidance on selecting rugged flat panel display

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I'm creating some specifications for a 6" color graphics flat panel display
in a rugged environment application that requires wide temp range, sunlight
readable, shock & vib resistance, etc.  I've embarked on an effort to learn
more about LCDs and especially what all the vendor specs *really* mean and
what options are out there.  I'm picking up tidbits from trade magazines,
vendor websites, and other web sites like the US Display Consortium, but I
can't find any kind of article or book that provides comprehensive guidance
on rugged LCD selection that is current.   Like for example what makes one
CCFL backlight more rugged than another one ?  I've yet to find a
salesperson who can really answer my questions other than to say yeah ours
does all that.

Using the go with what everybody else is doing technique, I can see that the
general trend in rugged flat panel displays now is for active TFT LCDs with
CCFL backlights and transflective screens, with some moves to LED
backlighting.  But I want to understand the specs and tradeoffs.

Does anybody have any ideas on articles or books that have comprehensive and
timely info on flat panel display selection in rugged applications, with a
slant on LCDs ?  Or even ruggedization techniques for sunlight readable
commercial grade LCDs ?

Re: guidance on selecting rugged flat panel display

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You might look into milatary specs and articles on

Re: guidance on selecting rugged flat panel display
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James, it all depends on how "rugged" your application is. LCDs are
pretty much ruled out of the picture for, say, tactical military
systems because of their lack of tolerance to extremes of temperature.
Shadow mask CRTs are similarly ruled out due to their susceptibility
to the effects shock and vibration.

What is left are neon plasma flat panel displays and penetration
phosphor color CRTs, both of which remain widely deployed for naval
tactical applications and use on tanks and other types of tactical
armored vehicles.

Most military organizations today often quantify "ruggedness" in terms
of the product's ability to survive the MIL-STD-901 shock test, some
specified vibration test, and a 30-day simulated life-cycle test that
involves temperature extremes from (IIRC) temperatures from -80 C to
+55 C with humidities ranging from 20% to 100% (non-condensing).

Fortunately most of todays commercial and scientific (including
medical) applications do not justify a need for such ruggedness.
However, some industrial field applications do.

My suggestion would be to review mil-specs covering the devices that
interest you, determine which vendors products meet these specs, and
go from there.

                                                       Harry C.

Re: guidance on selecting rugged flat panel display /


Re: guidance on selecting rugged flat panel display (james) wrote in message

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And your point in posting this link to a typical commerical quality
display is?

If something like this will do the job for your application, then
fine. Just don't confuse it with some sort of a ruggedized device
(which I perhaps mistakenly thought was what you were asking about).

                                                Harry C.

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