[simpits-tech] LCD's ect.....

[Marv De Beque]

Welcome to the group.

I work for Honeywell and have intimate experience with the displays and lamp
assemblies you speak of.  That's the department I work in.

The good new is that most simulators don't need the rugged, high purity,
filtered, and color balanced glass as a real aircraft.

Conventional backlit panels will do very nicely since you don't have to
contend with bright sunlight streaming into the cockpit at every angle
imaginable.

It's not the FAA that is really picky, but the pilots that drive glass
specifications.  The FAA will evaluate it, but the real sweat and tears come
from the mountain of paper work that we produce to back up our design.

As a matter of fact, that is exactly where I off to now.  Our 3-day holiday
has been canceled because we need to make a Monday deadline to submit our
design documents.  Our software design document is about 1,400 pages and one
of our test documents is 2,800 pages.  All this for a 5ATI MFRD display
(uses off-the-shelf glass with filters on the glass and specialized
backlight assembly).

I am figuring I will put in 30 hours this weekend.

Marv


On 7/3/03 11:56 PM, "A. Pelnar" <apelnar@sportogs.com> wrote:

> Ok guess Im just jumping in with both feet. Ive been working on an LCD
> EFIS system off and on for quite awhile. A few points to make about
> "real" LCD panels. The FAA is very picky and even more so the military
> about luminesence, color temprature, viewing angle...... Most of the
> real LCD panels Ive seen are just a straight unframed raw chip on glass
> lcd very fragile unmounted. Behind them is a rather elaborate
> backlighting system. Cold cathode flourescent usually bent in a Z shape
> with all kinds of shielding, optical filtering..... They are quite a
> work to give them the reliability and ruggedness they need. Ill see if I
> can get a pic of a backlighting unit from a honeywell com radio put on
> the net to look at its quite a work of machined aluminum. Will also try
> to post a pic of a "real" lcd which I belive was removed from a
> Universal FMS. The honeywell LCD is also an eleborate piece of
> engineering unfortunatly my sample is on loan and cant get a pic of it
> anytime soon its a COG lcd also built onto a machined aluminum frame the
> COG is ran out at 90 deg to the LCD and on the side of the frame which
> the backlighting mounts to. Its a bit hard to describe will try to put
> some pics up and link to them Belive me theres a good 100+$ worth of
> machine work just in these 2 pieces if you had to turn them out by hand.
> Last I heard replacement cost for the assembly was ~1500$ just for the
> parts.
> OK with that out of the way heres my introduction. Im in Wichita KS
> (cant think of a better place in the world to build a sim) The surplus
> is plentiful and cheap. Ive been working around aircraft mostly avionics
> since I moved here about 6 years ago and worked quite a bit with it
> while going thru school I carry a FCC license W/radar and broadcast.
> Right now in the state of the aircraft economy Im offically unemployed
> but am ramping up to do my own thing (not aircraft or electronics
> related) Occasionally I do some work for a sim shop here ran by some x
> flight safety employees they are coming out with one helluva I/O system.
> Im passivly working on an EFIS system for them they havnt put the
> squeeze on for it YET.
> On to the project. Mine is a bit difffrent Im not really a big enough
> fan of aircraft to build a sim but I am big time into spacecraft. Im
> working at building a ficticous spacecraft sim that could possibly exist
> with todays technology. (no Im not a sci-fi buf either)  Yea I know the
> shuttle is obvious but its been done and the shuttle program is what ~30
> years old. Might as well have some fun with it.  Thats me in a nut shell
> and Im about as nutty as they come. Ill post questions, comments and
> snide remarks as they are prompted
> Laterz
> Austin
> 
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