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lameboyadvance
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« on: November 22, 2011, 06:55:54 AM »

Hi everybody.

I wish I had known about this place a while back. I have had 2 ultra hires 15in LCDs (a 1600x1200 Toshiba LTM15C166B and a 2048x1536 IDTech IAQX10S) I have wanted to turn into PC monitors for ages. Hopefully people here can help me with that, or at least point me in the right direction.
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bernard
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« Reply #1 on: November 22, 2011, 07:23:40 AM »

Just get a LVDS board from NYJTouch.  http://wiki.bongofish.co.uk/doku.php?id=bongofish:lvdsvendors
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lameboyadvance
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« Reply #2 on: November 22, 2011, 07:35:08 AM »


I already have her NJY5621 board. Best it could manage was a 'rainbow effect' (colours were all wrong).

I might consider her R.RM5451 board and hope that one of the programmable roms is a close enough match for my LCD.

...Either that or give up and shell out for a Sharp UXGA LCD...
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bernard
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« Reply #3 on: November 22, 2011, 07:56:38 AM »

Oops just saw that you did another thread with a very much related content.  http://forum.bongofish.co.uk/index.php?topic=2048.0

Just get a LVDS board from NYJTouch.  http://wiki.bongofish.co.uk/doku.php?id=bongofish:lvdsvendors

I already have her NJY5621 board. Best it could manage was a 'rainbow effect' (colours were all wrong).

But was that board programmed for your LCD panel ?  rainbow effect?  Sounds like they picked 6 bit color and you have an 8 bit color panel (or vice-versa)?  Or maybe the RGB / BGR ordering was wrong?  If you display "perfect" shades of Red, Green and Blue, what happens?  A "perfect" shade should be 256 pixel in length. I had done a test picture to diagnose this. Can you take a picture of this image looked through the LCD?





If you are getting another board, maybe buy the programmer as well, so you can try for yourself if NYJtouch screws up the programming.  
« Last Edit: November 22, 2011, 08:00:34 AM by bernard » Logged
lameboyadvance
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« Reply #4 on: November 22, 2011, 09:20:43 AM »

Sounds like they picked 6 bit color and you have an 8 bit color panel (or vice-versa)?

...

If you are getting another board, maybe buy the programmer as well, so you can try for yourself if NYJtouch screws up the programming.  
I'd be getting the USB programmer for the new board as well. She couldn't provide an actual rom for mine, and suggested best bet is trying their until I find one that works.

We decided it was a 6/8bit issue. The controller does 1600x1200 8-bit, but a datasheet I found (http://www.datasheetarchive.com/datasheet.php?dir=Datasheet-024&file=DSA00420713.pdf&id=1&keywords=LTM15C162*  LTM15C162 - the closest I could find to my 166B) lists the LCD as 6 bit.

Anyway here is the results of the colour bars:
http://imageshack.us/photo/my-images/703/22112011749.jpg

(Full) red, green & blue seem to match, however the shades are all wrong, and for some reason white is yellow.

...It also seem to have a ghosting issue at 1600x1200 (but OK at 1280x1024).
http://imageshack.us/photo/my-images/812/22112011751.jpg


And I created that other thread about my other LCD (IDTech IAQ10S)
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bernard
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« Reply #5 on: November 22, 2011, 02:09:57 PM »

(Also try color bars  at 1:1 scale instead of stretching it at full screen).

This really really looks like a 6/8 bit issue -- a programming error essentially.  Go into the OSD menu and reduce the contrast (or the brightness).  You might be surprised.
« Last Edit: November 22, 2011, 04:12:23 PM by bernard » Logged
blackstars
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« Reply #6 on: May 18, 2012, 06:31:13 AM »

Hello
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