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Topic: new life for an old lcd display (Read 1 time) previous topic - next topic

MAS3

#5
Jan 21, 2013, 10:10 pm Last Edit: Jan 21, 2013, 11:38 pm by MAS3 Reason: 1
OK the (plastic)glass you're holding, with the 40 rows and 143 columns, isn't the display pixels.
It forms the diffusor together with the white sheet, meant to spread the backlight as evenly as possible.
It's location would be beneath the green display glass.

You're holding the glass at its connector.
You can see some dark and light alternating  "ridges" in there.
You will also have seen some gray (or whatever)/black rubberlike strip, clamped between the display glass and the pcb.
Those strips have a more fine structure than the contacts of the pcb and the displayglass.

It is possible for you to not be able to see the pixels i was talking about earlier.

As there doesn't seem to be more identifying texts, it it unlikely to get this thing to work, i'm sorry.
There's also no way to find out anything about the 16 pins of the connector, unless you'll be able to connect it and have the display working.
Or if you can get a hold of the schematics of the donor device.
Even then it will be a lot of work finding out how it does work, and to find out how to make it work with your Arduino.
Have a look at "blink without delay".
Did you connect the grounds ?
Je kunt hier ook in het Nederlands terecht: http://arduino.cc/forum/index.php/board,77.0.html

schiller

thanks anyway, you gave me such helpful infos about display components!
eventually, if i'll find out how to make it work i will update the thread..



WinstonP

well, first I cringed when I saw how far he went to disassemble the thing (I've done it myself but I have a little experience). but if he can follow the traces from the "serial" header to the first IC chip that it comes to, then we could determine if it is in fact a serial interface.

in reply #2, it appears as that board is the main control board and that there was a 16 pin header cable that went from that to the display board. and from what I can see on the display board is that it's "only" a display board, no controller (but I'm probably wrong). It would help if you copied down the numbers that appear on those ICs. I know you cant put logos here but if you could maybe say it's a stylized "M" for Motorola or "TI" for Texas Instruments and make each line separate. Like a chip I'm looking at now has:
---------
Atmel   632
93C46
PC
---------

ps and good luck, we're all counting on you.

MAS3

The board in reply 2 IS the display board, from the back.
The controller is glued to that board.
I'd be very surprised if there was to be an external controller, controlling a LCD (of this size) using no more than 16 pins.
Have a look at "blink without delay".
Did you connect the grounds ?
Je kunt hier ook in het Nederlands terecht: http://arduino.cc/forum/index.php/board,77.0.html

Zapro

As OP did remove this LCD from a "Master keyboard" (Whatever THAT means) why not look up the model number of the keyboard and have a look at the display energised.

I'm 99% sure it's a custom graphic display, and it would be very hard to use it.

// Per.

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