I have a display taken out of an old Ricoh 1018D copier. Unfortunately, I can't find the parameters of this display anywhere.
The photos show the back of the board with the display and the markings on the glass. Out of the 9 pins, I recognized 1 - GND, 2 VCC, 5 - probably RW, 7 - backlight brightness (reacts to potentiometer and PWM), 9 - is probably EN because when LOW is given, the display goes out, and when HIGH, the backlight turns on.
I contacted ROHM but they don't know anything about this display.
The resolution is probably 128x24, although I'm not sure.
Can anyone help me identify the COG control system and the remaining pins?
Quite likely as it's probably a proprietary design and they don't want to tell you anything about it.
The question of driving/identifying a salvaged display appears in the forums regularly and the answer is usually along the lines of: you are on your own and good luck with your project.
It's not that we don't want to help, but without any hints on the silkscreen of the display board, it's simply a guessing game. It helps if the device that the display comes from is still working as that offers the opportunity to probe the signals with an LA or scope, assuming of course that you have access to such equipment.
You could search to see if there is a service manual for the device and hope that there may be a schematic that may show the display board and the signals going to it.
I don't think the design of the copier is top secret. Unfortunately, the documentation available for this model is too general. Maybe I'll ask around in the service centers. I was also hoping that someone on the forum would come across this type of display. Oh well, I'll stick to the standard answer: "you are on your own and good luck with your project".
I'm guessing that the board in the photo is the driver board for the display and that the grey 9-way flat cable on the right hand side connects to the rest of the copier. You could look on the motherboard where that cable plugs in just to see if there are any clues as to the signals.
You might get lucky if the signals route to a microcontroller that you can identify. That could lead to a datasheet that details what hardware interfaces of the microcontroller connect to those pins. That may indicate if it's a serial link like I2C or SPI.
Are there any components on the other side of the board in post #1? I don't see anything resembling a controller chip for the display. Perhaps it's part of the actual display.
The ROHM logo could be from ROHM Semiconductor. You might need the assistance of the Wayback Machine (Internet Archive) to see if there was a standard display with the part number RCD6050. That might also be proprietary if the display looks to have custom icons on it rather than simple alphanumerics.
There are tons of displays that would be neat if it was public knowledge how to re-purpose them. Cell phones, iPads, laptops etc. And not only the display but the touch as well.
It's such a waste of resources.
Write to the manufacturer and request the specifications.
This came up on my search for S-11870C and it is a display from Waveshare a well known company. https://www.waveshare.com/10.1inch-hdmi-lcd.htm
I wrote to them. They claim that the logo in the photo is very old and they have no information about this model.
Then your only option is to reverse engineer the complete display circuit, best starting with a functioning example of the original device, so that you can deduce logic voltage levels and the data transmission protocol.
Display pulled from scrapped device. Zero chance to check operation.
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