LCDs

J. A. Streich

I have come across a couple of 40 pin LCDs (with no circuit board for interpretation) and I was woundering how I can figgure out the pinning. I have no model number, or anything. There are 20 pins on each side (above and bellow the display). So, my guess is that the pins litterally tie into each of the crysals to change their polerization and switch from clear to black. If I'm right, all I need to do is figgure out what the maximum voltage I can put on each pin is, and make a circuit to draw each char and place it properly.

I've tried googling but all i've found are LCDs with circuits that do the drawing, not just raw LCDs.

Newzed

Those are probably two sets of 20 pins in parallel.· Check continuity between the sets of pins to make sure.· Pinout on LCDs is usually standard.· I can give it to you if you can't find it.

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Sid Weaver
TWS/RWS RF Modules

http://hometown.aol.com/newzed/index.html
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J. A. Streich

After much googling I have been un able to find the correct pinout. A little experimenting has gotten a few of the digits to turn, but I've not been able to figgure out the pinout. Any help would be appreciated.

Newzed

Go to the Parallax site, search for 2x16 LCD and download the .pdf file.· The pin out for the 1x14 is the same as for the 2x7.



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Sid Weaver
TWS/RWS RF Modules

http://hometown.aol.com/newzed/index.html
·

Chris Savage

Does this LCD Display have 7-seg or similar digits hard-coded into the display?· Because it sounds like an LCD Panel Display, which would require a chip like this:

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=131381

Can you post a picture?

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Chris Savage

Knight Designs
324 West Main Street
P.O. Box 97
Montour Falls, NY 14865
(607) 535-6777

Business Page:·· http://www.knightdesigns.com
Personal Page:··· http://www.lightlink.com/dream/chris
·

J. A. Streich

Indeed, it is made of 7 segment digits... I've not been arround b/c uni and work and the long holiday was easily filled. Thank you all so much, I think Chris might just have given my the link I've been looking for.

Chris Savage

No problem...I meant to post one more link in that message though:

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=116082

This is a display like what I think you have...And this is the type that requires the driver chip I posted.



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Chris Savage

Knight Designs
324 West Main Street
P.O. Box 97
Montour Falls, NY 14865
(607) 535-6777

Business Page:·· http://www.knightdesigns.com
Personal Page:··· http://www.lightlink.com/dream/chris
Designs Page:··· http://www.lightlink.com/dream/designs
·

DntGvaSht

I also have an LCD display, with a driver board attached, that I have been unable to find any docs on... if anyone has any info or links it would be greatly appreciated, here is some info and ID numbers:

It came out of a qualcom cellphone, numbers are DMC-50922NFJ-SLY, C0B50922A-ASSY, GCMK-50CX, sticker on the tar-chip says 9945N4-C0, CV90-46004-4,·the LCD·has symbols along the top, and the bottom 80% or so is made up of bitmapped character blocks in a 12x4 pattern.· I'm guessing that it's truly a 16x4 display, with the latter 4 digits of each row controlling·the symbols at the top.· It has 10 pins for interfacing, and I havn't tried assuming it's a hitachi-like.· But I may just have to do that.

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"OIOOIOOO OIIOOIOI OIIOIIOO OIIOIIOO OIIOIIII OOIOOOOO OIIIOIII OIIOIIII OIIIOOIO OIIOIIOO OIIOOIOO OOIOOOOI"
http://68.11.58.106:69/ircchat2/jicra-1.2.2/index-js.html

Chris Savage

If it's a standard-looking (Is that the right terminology?) Character LCD Display, Optrex has a DMC Series of LCD Displays...

This might be what you're looking for...

http://www.optrex.com/engcenter/manuals.asp





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Chris Savage

Knight Designs
324 West Main Street
P.O. Box 97
Montour Falls, NY 14865
(607) 535-6777

Business Page:·· http://www.knightdesigns.com
Personal Page:··· http://www.lightlink.com/dream/chris
Designs Page:··· http://www.lightlink.com/dream/designs
·

DntGvaSht

That looks pretty close, the highest model in the table is DMC-50457, but i'm sure the protocol and registers are similar, thanks for the link

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"OIOOIOOO OIIOOIOI OIIOIIOO OIIOIIOO OIIOIIII OOIOOOOO OIIIOIII OIIOIIII OIIIOOIO OIIOIIOO OIIOOIOO OOIOOOOI"
http://68.11.58.106:69/ircchat2/jicra-1.2.2/index-js.html

Chris Savage

No problem...As soon as I saw the DMC in your post, I thought of Optrex...Take care!



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Chris Savage

Knight Designs
324 West Main Street
P.O. Box 97
Montour Falls, NY 14865
(607) 535-6777

Business Page:·· http://www.knightdesigns.com
Personal Page:··· http://www.lightlink.com/dream/chris
Designs Page:··· http://www.lightlink.com/dream/designs
·

J. A. Streich

Chris Savage said...

No problem...I meant to post one more link in that message though:

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=116082

This is a display like what I think you have...And this is the type that requires the driver chip I posted.

Indeed, that is what I have, only froma different company...· Many, many thanks.