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'[BUY]:searching for mini lcd high resolution scre'
2002\09\25@155726 by edg

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Hi,
i'am looking for a monochrone mini high resolution lcd screen (size say
around 10 x 5 cm) and with a resolution of min 3200x2500 pixels. i have
search on internet, but i haven't found it.

etienne

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2002\09\25@162615 by M. Adam Davis

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!!!!

No such LCD exists, except perhaps in IBM's labs.

The highest resolution LCD you can buy right now has a maximum
resolution of 200 pixels per inch.  An article about it can be found here:
www.extremetech.com/article2/0,3973,525370,00.asp
Viewsonic sells them, 22.2" displays with a resolution of 3840x2400.

You could purchase LCD's meant for projectors, but mostly those top out
at 1024x768.  Actually, now that  think about it, your best bet is
probably to get a 3 LCD projector that has as high a resolution you can
find (1600x1200, perhaps) since the LCDs themselves will be monochrome.

Out of curiosity, what do you need such a high resolution LCD for anyway?

-Adam
edg wrote:

{Quote hidden}

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2002\09\25@162627 by Smith,Steven W

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Sorry to let you down but its not possible today or any time soon.  
  10 CM is 100,000 microns.  This would give you 32 micron pixels.
This is easily possible with photo-lithography but because the
resistance is high for indium tin oxide, the clear metal, used to make
the capacitors in the display.  You also need a 6-10 micron pixel gap.
Also this doesn't take into account the space for the LCD trace routing
and glue seal which would also cut down your size.  
You can't buy LCD Drivers buy drivers that have that many I/O, max is
about 250 per die.  Also the pad size is limited -- ~50 microns per pad.
So bond space for the drivers would be bigger than the display active
area.

With Poly-silicon TFT technology this is possible, but not yet available
and expensive ~ $60-$100 in very large quantities.  With Poly, the
drivers are built into the "Glass" (Actually in the poly layer itself).
They want to mostly make color anyway.
You could easily get 128, 256 x 64 or by 80 in graphic LCD.  Cellular
phones are about this size.  
One place to get a high resolution display is from one of the LCD on
silicon (LCoS)- Heads up display people, Three Five Systems, H.P. or
Colorado Micro displays.  Probably you could buy a prototype - but
probably not monochrome and not cheap.   They are also 1024x768 or
similar format and smaller.
These are used in rear projection TV's and camcorder viewfinders.  Check
out http://www.threefive.com  where you can read about them.  Also check out
ww.sid.org for general display links and information.  
Also you have another problem with the multiplexing a passive STN's are
limited in resolution.  So you need a TN cell with active matrix drive
to get that kind of resolution.  
In short your resolution is way too high to fit into that space.  Even a
desk top LCD is only on the order of 1024x768 - so 3x this for
monochrome in a 15" display.  IBM showed a research model that was
higher density, but not a production model. Most people who want TFT's
want color, so most high resolution, small displays are color.  
Steve Smith
Electrical Engineer


{Original Message removed}

2002\09\25@175626 by edg

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-----Oorspronkelijk bericht-----
Van: pic microcontroller discussion list
[spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU]Namens M. Adam Davis
Verzonden: woensdag 25 september 2002 22:25
Aan: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
Onderwerp: Re: [BUY]:searching for mini lcd high resolution screen


!!!!

No such LCD exists, except perhaps in IBM's labs.

The highest resolution LCD you can buy right now has a maximum
resolution of 200 pixels per inch.  An article about it can be found here:
www.extremetech.com/article2/0,3973,525370,00.asp
Viewsonic sells them, 22.2" displays with a resolution of 3840x2400.

You could purchase LCD's meant for projectors, but mostly those top out
at 1024x768.  Actually, now that  think about it, your best bet is
probably to get a 3 LCD projector that has as high a resolution you can
find (1600x1200, perhaps) since the LCDs themselves will be monochrome.

Out of curiosity, what do you need such a high resolution LCD for anyway?

It's for use in a photgraphic machine. It wil replace the light head in a
photo printer


-Adam
edg wrote:

{Quote hidden}

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2002\09\25@181935 by Olin Lathrop

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> i'am looking for a monochrone mini high resolution lcd screen (size say
> around 10 x 5 cm) and with a resolution of min 3200x2500 pixels. i have
> search on internet, but i haven't found it.

Thats a very high resolution in a small size!  Do you realize that the pixel
pitch is only 100mm / 3200pixels = 0.031mm/pixel?  Normal color CRT monitors
are in the .22 to .28 "dot" (triad, actually) pitch range.  Another way to
look at what you are asking for is in terms of DPI:

 3200dots / (100mm / 25.4 mm per inch)
 = 3200 dots / 3.94 inches
 = 813 DPI

This seems rather absurd.  What are you trying to do?


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(978) 742-9014, http://www.embedinc.com

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'[BUY]:searching for mini lcd high resolution scre'
2002\10\07@172558 by Matt Heck
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Ye gods.  The only place you have any real chance of finding an LCD
screen with that kind of pixel density is some sort of medical imaging
application, and my guess is that you won't like the pricing.

The only people that would even think about making something like that--
and I'm not at all sure that they do-- are probably IBM, Sharp, and
Hitachi, probably in that order.

What in the world prompted that kind of a part?

{Original Message removed}

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