reverse engineering old chip on glass lcd display

[menash]

Hi everyone!

I have an old lcd display laying around that i try to reuse it (pictures attaced). I have no idea from which device i took it..
my goal is to drive it with arduino uno.

so what i know:

-there is sticker with the text "7127FFA" on the back of the screen - found nothing in google.
-in the glass (almost impossible to see) i found "NCOG39" writen into the glass - again nothing in google.

-let's number the pin from 1 to 8 when the pin near the red dots is pin number 8. I tried to do some measurments on diod mode, and i found that if choose pin 3 as ground and and run with the positive prob on the other pins, i get those results:
pin 1: 0.62v
pin 2: 0.6v
pin 4: 0.78v
pin 5 to 8: 0.8v

also if i connect the positive prob to pin to and again run on the other pins i get:
pin 3: 0.61v
pin 4: 0.69v
pin 5 to 8: 0.71v

any other combination that i tried - read nothing.


do you have any idea how can i identify the pins?

thanks!

[tooki]

A bit of googling for “cog lcd 8 pin interface”, in the image results, showed an eerily similar one on this page: http://www.instructables.com/id/Salvaging-Liquid-Crystal-Displays-LCDs/

And it has a pinout. Give that a try.