[Q] Any explored Transparent LCD for HUD

[bnepethomas]

Hi Guys

 

Any explored using a transparent LCD Panel for a Hud? I see they now come in 10.2 inch versions

search ebay for

10.2inch Transparent LCD screen TFT-LCD panel digital advertising display

 

chers

 

Peter

Edited June 17, 2015 by bnepethomas

[98abaile]

Anyone wanting a hud could probably just build a holographic one using a regular lcd, a lens and a combiner.

[Boltz]

Nice find certainly looks interesting

[Deadman]

98 I want to award you the rank of Captain Obvious

[agrasyuk]

interesting find. It will not work however - unlike this LCD actual HUDs provide collimated image. This one cannot prove collimation and always changing eye position (as it is not really feasable to restrain one's head) will result in hud imagery being not stationary in relation to main out side view.

 

Then there was an issue with the hud viewport itself. While PeterP successfully exported everything he couldn't make the flight path projection mark (plz remind me the proper a10 term) stationary . IIRC It has to do with some ED code that calculates view deflection as forces act on our simulated pilots head, and Peter couldn't lock the viewpoint.

 

I aquired combiner glass and a HUD lense (from harrier I believe) , will be attempting a working HUD when time comes.

[bnepethomas]

Hi Guys

 

I'm thinking about taking two approaches to the hud. Given I fly with with different zoom settings, zoomed out while getting from A-to-B, and zoomed in while trying to find something to blow-up, it means a perfectly collimated hud isn't going to be perfect all the time.

 

So my thoughts are using the hud onto the main screen when perfect alignment is needed, but when getting from A-to-B using the hud on the transparent LCD (for display flight data).

 

No know it ain't perfect but hopefully gives me something a little better than what I've got at the moment.

 

cheers

 

Peter

[Deadman]

How far away is your out side display? since collimation has more to do with the infinite focus of the HUD.

[bnepethomas]

How far away is your out side display? since collimation has more to do with the infinite focus of the HUD.

Ahh good question Deadman I was think more about the dot-of-pain being in the right place - the main screen is a wall that is around 5 feet from where the hud would be sitting.

 

for giggles I've just ordered one to see the experience would be like.

 

Cheers

 

Peter

[Deadman]

Peter search on the VP site as i recall with that amount of distance you should be able to used a collimated HUD with out a problem.with the HUD focus on infinity may possibly be little influence with the zoom I would definitely ask Ian if there is a different way to export the HUD information to avoid the head shake problem. as far as aligning the HUD there was a tutorial for the F16 that may be applicable on the VP site http://www.viperpits.org/smf/index.php/topic,1149.msg17379.html#msg17379

 

The only other thing I would do is use a CRT with some green filter instead of a small LCD.

[bnepethomas]

Peter search on the VP site as i recall with that amount of distance you should be able to used a collimated HUD with out a problem.with the HUD focus on infinity may possibly be little influence with the zoom I would definitely ask Ian if there is a different way to export the HUD information to avoid the head shake problem. as far as aligning the HUD there was a tutorial for the F16 that may be applicable on the VP site http://www.viperpits.org/smf/index.php/topic,1149.msg17379.html#msg17379

 

The only other thing I would do is use a CRT with some green filter instead of a small LCD.

 

Thanks Deadman I'll check that out.

 

cheers

 

Peter

[Deadman]

No problem when ever you have time for a quick question give me a ring if you can

[rocketeer]

sleepara's solution of using two pieces of reflective glass with normal lcd screen seems like the simplest and cheapest solution.

 

http://forums.eagle.ru/showthread.php?t=90825

[hegykc]

Interesting. But isn't this just a regular lcd panel & controller with the backlight and casing removed? Also 800x400 resolution may be a problem for hud display?

 

Wouldn't it work with a 50% cheaper 1080p lcd panel and a controller for it:

http://www.ebay.com/itm/VGA-Lcd-controller-board-11-6inch-1920-1080-N116HSE-EJ1-lcd-panel-/181751031255?pt=LH_DefaultDomain_0&hash=item2a5134a5d7

Edited June 18, 2015 by hegykc

[bnepethomas]

Interesting. But isn't this just a regular lcd panel & controller with the backlight and casing removed? Also 800x400 resolution may be a problem for hud display?

 

Wouldn't it work with a 50% cheaper 1080p lcd panel and a controller for it:

http://www.ebay.com/itm/VGA-Lcd-controller-board-11-6inch-1920-1080-N116HSE-EJ1-lcd-panel-/181751031255?pt=LH_DefaultDomain_0&hash=item2a5134a5d7

 

I'm not sure but going to find out I guess :), I would have preferred a higher resolution but given this is a bit of a brave new world for this black duck, thought I'd start with a small lower cost version, and if it works scale up as needed. Re it just being an ordinary display, with bits removed I'm not sure, that would make some sense, and if that is the case I've got a couple of panels in the pit room that may yet make the ultimate sacrifice!

 

I do have some reflect glass and a first surface mirror on stand-by as well, that involves moving a few things around behind the front dash, so Plan-C is ready to go if needed.

 

cheers

 

Peter

[hegykc]

After some more thought, yes I do believe it is a standard lcd tft panel. Or one with a "reversed" firwmare where it is transparent when "off", as opposed to a regular one which is transparent when "on".

 

if you take the one from my link, hook it up to a pc and put a 100% white screen on it, the "lcd" will turn transparent (with no backlight and no casing).

 

So if you can output a green hud on a white background, it will display only the hud. But it all depends on the light coming from behind it. So if you were to fly a night mission I am affraid it wouldn't work, as there would be very little light coming from the DCS screen, unless you devise a way to project a separate light source onto the panel...

 

It's a stretch, but I'll keep my fingers crossed for ya :)

 

Edit: the picture of the "transparent" lcd on ebay is kind of misleading for anyone not familiar with lcd panels. Every lcd is "transparent" when turned 100% on. But without a backlight the lcd doesn't produce any picture. So if you were to put this "transparent lcd" into a dark room, there would be no image on it, regardless that it actually displays something. You need bright light (and white background) behind the pixels to have anything displayed.

Edited June 18, 2015 by hegykc

[hegykc]

You might want to try something like this first:

a 2048x1536 resolution, 9.7" ipad 3 screen for 38$:

http://www.ebay.com/itm/Brand-New-LCD-Display-Screen-Parts-Replacement-For-Ipad-3-3rd-Gen-Generation-/310659626027?pt=LH_DefaultDomain_0&hash=item4854c1b42b

 

and a controller for 30$ :

http://abusemark.com/store/index.php?main_page=product_info&cPath=3&products_id=47&zenid=2ndov3i519ricbb4erfc89vh56

 

Removing the backlight and metal plate should not be a problem as I know people are using them for 3d printers and they have to remove polarizers and glare shields and reflective layers and whatnot...

[agrasyuk]

I'm very curious about how that special screen Peter found going to look, but I'm very very sceptical. I have no doubts about ordinary TFT without the backlight however - it will not be sufficient to display HUD symbology . friend had a transparency projector hacked with 15lcd tft, so had a chance to see how those look in action .

And that is aside of the non colimated image .

 

 

the closer HUD solution placed to main front view screen the lesser deviation due to non collimated imagery. Focus distance difference also obviously becomes less ofor an isue as well. But that kind of defeats the purpose of hud, no? Might as well project it with the main view and have a piece of glass in front for decorative purposes .

[bnepethomas]

I'm very curious about how that special screen Peter found going to look, but I'm very very sceptical. I have no doubts about ordinary TFT without the backlight however - it will not be sufficient to display HUD symbology . friend had a transparency projector hacked with 15lcd tft, so had a chance to see how those look in action .

And that is aside of the non colimated image .

 

 

the closer HUD solution placed to main front view screen the lesser deviation due to non collimated imagery. Focus distance difference also obviously becomes less ofor an isue as well. But that kind of defeats the purpose of hud, no? Might as well project it with the main view and have a piece of glass in front for decorative purposes .

 

:) gotta to have the occasional science experiment, I've also got my concerns but nothing ventured nothing gained.

[bnepethomas]

You might want to try something like this first:

a 2048x1536 resolution, 9.7" ipad 3 screen for 38$:

http://www.ebay.com/itm/Brand-New-LCD-Display-Screen-Parts-Replacement-For-Ipad-3-3rd-Gen-Generation-/310659626027?pt=LH_DefaultDomain_0&hash=item4854c1b42b

 

and a controller for 30$ :

http://abusemark.com/store/index.php?main_page=product_info&cPath=3&products_id=47&zenid=2ndov3i519ricbb4erfc89vh56

 

Removing the backlight and metal plate should not be a problem as I know people are using them for 3d printers and they have to remove polarizers and glare shields and reflective layers and whatnot...

nice - thanks for the pointer