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psychicall lynx lcd dimension


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#1 candle OFFLINE  

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Posted Thu Aug 30, 2012 5:07 PM

hello all

seems that most obvious information is hardest to find

what are psychical lcd screen dimensions? but not only active area (that is what makes that 160x102 pixels) but the whole module, including its thickness

#2 GadgetUK OFFLINE  

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Posted Fri Aug 31, 2012 9:14 AM

Without taking my Lynx apart, Ive got no idea. Why not take yours apart to measure it?

Are you talking about Lynx 1 or 2?

#3 candle OFFLINE  

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Posted Fri Aug 31, 2012 9:38 AM

i don't have any lynx, in fact, i even haven't seen one in flesh in my entire life, yet i need that information badly

#4 GadgetUK OFFLINE  

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Posted Fri Aug 31, 2012 12:50 PM

Why do you need to know then?

#5 candle OFFLINE  

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Posted Fri Aug 31, 2012 3:42 PM

perhaps you should make a query over my posts, and learn what i do?

just a hint ;)

Edited by candle, Fri Aug 31, 2012 3:42 PM.


#6 zoltan OFFLINE  

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Posted Sun Sep 2, 2012 3:23 PM

Hi candle, I dont know the dimensions of the Lynx screen either, BUT if you need this information because you are planning to make a proper lcd screen for the Lynx then I am happy to disassemble one of my Lynxes and measure the screen ( dreaming, dreaming... :) ).

#7 Shawn Jefferson OFFLINE  

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Posted Sun Sep 2, 2012 4:15 PM

Candle will have a Lynx soon... if nothing untowards happens to it in transit. :)

Candle's contributions to the Atari 8-bit scene: Ultimate 1MB upgrade, VBXE 2 upgrade, Simple Stereo board, Incognito board to make 800 into XL/XE, probably many more I'm forgetting. He's a hardware wizard with a proven track record of making reliable, quality, afforable upgrades. Definitely someone in whom you want to foster an interest in the Atari lynx. ;)

#8 candle OFFLINE  

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Posted Mon Sep 3, 2012 5:05 AM

all lies! :)

but yes, i do want to have tv-out and proper lcd screen replacement as the one it has it's not up to today's standards

#9 GadgetUK OFFLINE  

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Posted Mon Sep 3, 2012 7:29 AM

I think you've got quite a challenge in front of you!!! I only have Lynx 2's, i dont mind taking mine appart later if no one else has one in bits.

I think the problems are going to be timing related, resolution differences, and colour mapping. I guess if a composite signal could be made (which I think will be very difficult with what the Lynx provides), then an aftermarket LCD will probably work if it fits (a bit like the NOMAD mod), plus youve got composite out as well then with no extra work.

The other option is to try and drive an LCD directly with minimal electronics inbetween hopefully, but I am not sure how standard the Lynx LCD is compared to most modern LCD's



#10 GadgetUK OFFLINE  

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Posted Mon Sep 3, 2012 7:33 AM

You might want to burn the Lynx Diagnostics onto an EPROM as well. Get one of those Pasui 256Kb PCBs - or make one, then you can use the colour / screen tests to aid investigation with a scope or other diagnostic tools etc.

#11 karri OFFLINE  

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Posted Mon Sep 3, 2012 11:14 AM

The visible part of the screen is 75mm wide and 48mm high.

#12 matashen OFFLINE  

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Posted Mon Sep 3, 2012 12:43 PM

160x102pixel 3,5"

#13 candle OFFLINE  

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Posted Mon Sep 3, 2012 3:47 PM

75x48 gives almost squre pixels, this is very good, because simple upscaling x2 can be used
what is overall thickness of lcd module including the backlight?

#14 karri OFFLINE  

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Posted Tue Sep 4, 2012 9:30 PM

The thickness is 20mm.
-
Karri

#15 karri OFFLINE  

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Posted Wed Sep 5, 2012 4:34 AM

By the way... There is one special thing in driving the Lynx LCD. Usually the Lynx displays only 16 colors at the same time out of a palette of 4096 colors. The Lynx can actually drive 4 bits per color (12 bits total). Some Lynx programs take advantage of this and change the palette at the start of each scanline. Then you can have a different set of 16 colors for every scanline.

In case you plan to use the actual LCD control lines then there is no problem with this.

--
Karri

#16 candle OFFLINE  

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Posted Wed Sep 5, 2012 8:20 AM

i do, but i found some demos using "high colour mode" which seems to be just plain old triple interlace - not very good on modern displays, they are not as slow as the one inside lynx, not by any chance

20mm is a brick-thick
i though it would be 5 or 7 at most, making things tricky, but not impossible, with 20mm we're good, will have to think of some kind of supports...

how about outside dimensions?

so far we have thickness, and active area

ps. modern 3.5" modules have active area of 70mm, leaving 2.5mm black stripes on each side - i'm targeting here in QVGA (320x240) display with square pixels, and upscaling incomming video stream by factor of 2 (160x102->320x204) - image will be proportional, and crisp clear, but slighty smaller though :(

#17 obschan OFFLINE  

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Posted Thu Sep 6, 2012 4:06 AM

On my lynx 1,
-thickness
2 white plastic plates, 2x1mm
the screen itself, 2mm
gray plastic support, 5 mm

It's a bit handmade but it can be a start...

Attached Thumbnails

  • CIMG3132_.jpg
  • CIMG3127_.jpg


#18 108 Stars OFFLINE  

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Posted Thu Sep 6, 2012 5:25 AM

I wonder if maybe thanks to the thick original display there may be room when a new screen is put in to also replacethe backlight. I imagine that nowadays there are better and less energy consuming ways to light the screen. Similar mods for Game Gear and Nomad improved battery life quite a bit afaik.

Edited by 108 Stars, Thu Sep 6, 2012 5:26 AM.


#19 candle OFFLINE  

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Posted Thu Sep 6, 2012 5:51 AM

obschan: how it connects with main board?

108 Stars: novadays LCD including LED backlight is 3.5mm thick

Edited by candle, Thu Sep 6, 2012 5:53 AM.


#20 obschan OFFLINE  

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Posted Thu Sep 6, 2012 6:58 AM

I guess the white plates are there o diffuse the back-light from the other side of the board.

obschan: how it connects with main board?


On the second pic. you can see on the right a 'soft' connector, I believe the green one at the bottom is a connector too.

#21 candle OFFLINE  

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Posted Thu Sep 6, 2012 7:27 AM

not much of a connector, just a flex ribbon, but it doesn't actually show the connector

#22 obschan OFFLINE  

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Posted Thu Sep 6, 2012 8:14 AM

http://www.allthings....zoomshare.com/
Can see it there on the "back of the screen disconnected" pic.

#23 candle OFFLINE  

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Posted Thu Sep 6, 2012 8:33 AM

this is lynx ii, is lynx i screen is the same? looks diffrent

#24 roland p OFFLINE  

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Posted Thu Sep 6, 2012 2:45 PM

I found some pictures of the lynx 1: http://www.mdgames.d...description.htm

The backlight-tube and the ribbon seems to be connected directly to the pcb.

#25 MrBland OFFLINE  

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Posted Fri Sep 7, 2012 8:10 PM

This topic has me pretty excited! Thanks for your work on this, keep us updated :D




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