China Woes Part "it´s over 9k" - 0.91" OLED displays

[bson]

From what I got they ain´t blue, all models are with white LEDs just "painted" over with various colors.

I mean they ain´t painted themselves, the polarizer I think is.

Blue OLEDs aren't painted over LEDs.

OLEDs aren't bipolar LEDs at all.

[TrickyNekro]

If you want good quality buy genuine parts from adafruit, sparkfun, etc, but I'll pay much more... Which still makes sense as time is often more expensive than saving every penny.

Nah, I don´t give my hard earned money to the likes of them, did it in the past. In one way they helped though, I started with PCB designing.

On a serious notice though, for those interested in the part, original is manufactured by Vishay. I provided link in an earlier post of mine.

And just to be clear, I do not blame the ebay seller for that. He did everything right.
I just would have never imagined that there could be more than one version of this thing, the second offering the same as the first plus a bit more for the cost of a pin.

But as you said, these are probably various iterations of knock-offs.

[TrickyNekro]

From what I got they ain´t blue, all models are with white LEDs just "painted" over with various colors.

I mean they ain´t painted themselves, the polarizer I think is.

Blue OLEDs aren't painted over LEDs.

OLEDs aren't bipolar LEDs at all.

Look at the two different available versions. The white one and the blue one. The difference is on the film they put on them.
That´s probably the polarizer film.

It´s much cheaper to manipulate the polarizer film rather than the whole display. And yes they do come with a polarizer.
I also confirmed it with my laptop display. The probably use it to enhance the contrast between the dots.
In fact, most monochromatic oled displays are probably white OLED displays with colored polarizers.

I´ve worked with a different kind of OLED display before, they were from Winstar with a WS0010 controller inside. The DC-DC converter inside was terribly noisy.
Have you thought of separating the supply of the DC/DC converter of the display from its Vcc line? What you are describing is a classic microcontroller lock-up scenario.

There's no obvious noise coming back.  Trust me, I know how to look for problems.  There may be noise on the module, or inside the controller, but that's not really fixable.

Didn´t say other wise. Still I´ll be contacting my own experiments. A charge pump with some low ESR caps can be very nasty, even if you can´t see it on the scope.
Usually ESR goes up with capacitance, be that the case using according to the datasheet a 2u2 cap at the supply and 1u caps on the charge pump, you got a small recipe for disaster.

There are also posts on the Internet where people mention problems using these OLEDs with ADCs. All the more suspicious for your case.
But I do digress, I´ll be testing and posting here.

[TrickyNekro]

Look at the two different available versions. The white one and the blue one. The difference is on the film they put on them.
That´s probably the polarizer film.

Do you know how OLEDs work? They don't need a polarizer to work. They are not LCDs.
The organic light emitting dye used in the display panel is different, not the film.

Yes, of course I do and I also know exactly what a polarizer is, my major was physics. Look at the datasheet though first page:
https://www.vishay.com/docs/37894/oled128o032dlpp3n00000.pdf

It says it clearly, with polarizer! That´s also why I said I tested it with my laptop LCD and can confirm it. LCDs need a polarizer!
Why exactly they use it, I wouldn´t really know, it´s not a perfect polarizer that´s for sure (or they use two layers, but I guess that wouldn´t really be the case).

Of course we are not talking about the Vishay product, we are talking about the ebay product, guess they copied that too. Probably deemed necessary for some reason.

But I really do try to double check what I write, unless I´m speculating, which I try to make clear