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SideBySide controlboard for TFT display (DIY project)
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ccamacho:
Hello everyone,

First, congratulate the community for this awesome site!.

I'm working on a  DIY project to have a Side By Side display for building up a VR goggle.

This is the main diagram of what I will like to build.



I'm not sure how hard would be to build this, I already have some ideas.

For the video switch I can:

* Convert the  HDMI signal to composite by using something like:


* Now use a solid state video switcher like the one described in here: https://www.engadget.com/2007/03/13/how-to-make-a-solid-state-a-v-switcher/

Now for the screen, I'll like to use a cheap 3.5" TFT display with the highest resolution possible (from aliexpress from around 11 USD).

Now, here is the part I'm not finding enough information.

How to create a SBS signal to display it on the screen?

Maybe is it possible to reprogram a RTD2660H HDMI/VGA/NTSC/PAL Driver Board to to what I need?

Any information is welcomed,
Thanks!


ovnr:
I take it you want to take a HDMI signal, convert it to composite, then switch between the HDMI-composite and another composite source to display that on two small TFTs? That bit is fine, but it'll of course look like shit because composite video is shit.

But since you're talking about side by side, are you thinking of the various 3D formats used, so that you can get a proper 3D effect - and not just display the same image on both screens? Because that would increase the difficulty waaaay beyond anything easily hacked together.

If you just want the same image on both screens, you should be able to just parallel the screens and hook them up to the same composite to LCD converter board you're using.


Also, video quality would be better if you instead converted composite to HDMI and used a HDMI switch.
ccamacho:
Ok,

So, let's take away the switch, the first thing would be then to use a control board like this one



Now, is it possible to output SBS image from it? I just need the same image twice, the thing is that if using two screens I'll need to use two (2) 1.8" screens (Do you know any good quality/hi resolution screens I can use?)


Can the RTD2660H be reprogrammed to split the image?
ebastler:

--- Quote from: ccamacho on April 25, 2018, 07:41:40 pm ---I just need the same image twice,

--- End quote ---

Huh? Don't you want a stereoscopic display? In which case, where would the two (slightly) different video signals come from?
ccamacho:
Not really,

I need exactly the same image twice, this is for using two 12mm FL lenses and to be able to focus the screens at this small distance.

I want this for FPV not for VR.

Maybe this control board can power two screens like this ?

http://uk.farnell.com/densitron/dd-160128fc-1a/display-oled-rgb-160x128/dp/1498857?Ntt=1498857&COM=BeagleBoard




Or maybe two screens like this one: http://www.newhavendisplay.com/nhd169160128ugc3-p-5603.html




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