Transparent OLED


(Kevin) #1

Random google-fu dropped me on this nuggetty morsel:

https://www.crystalfontz.com/product/cfal12856a00151b-128x56-transparent-oled-screen?kw=&origin=pla&gclid=Cj0KCQjwjpjkBRDRARIsAKv-0O1BztwbqaakCCFU-Qt6Kgfrx6q00sPk3Vf0GnM6bvjPncZHJ-NjVbEaApoMEALw_wcB

EDIT:
Also, what:

https://www.crystalfontz.com/product/cfal128128b0011w-128x128-round-oled-display

16 Gray Scale Dot Matrix

Arducircle


(Kevin) #2

In other 128x128 16 grayscale news:


(Stephane C) #3

Now that’s interesting… Really.


(Scott R) #4

The transparent oled looks interesting.
Years ago I stripped a small monochrome lcd down and toyed with inserting colour printed images behind.


(Kevin) #5

The 128x128 2-bit grayscale I’ve looked at before it looks like the price point might be approaching something that is feasible for us.


(Pharap) #6


(Kevin) #7

Literally all I’ve been thinking about all day… and this:


(Kevin) #8

Curiosity got the better of me, ordered 3


(fred ) #9

You can do some Vectrex stuff with it and make colored background inserts for your games.


#10

That’s the same display that is supported by the HomeMade package :slight_smile: That display is also great for a 64x64 emulated 2-bit mode (still using 1K display buffer). Perfect for something like this:

@Pharap ArduGlass :smiley:


#11

I already use it :sunglasses:


(Pharap) #12

I wish my Japanese were good enough to understand that.
でも、日本語が上手じゃない。
それはビットコインとブロックチェーンの説明ですね?

たにぐちさんはさとしなかもとですか?(冗談です。)


あ、あなたは今父親ですね?おめでとうございます、たにぐちさんと息子。


(Kevin) #13

Lol :laughing: :laughing:


#14

はい、だいぶ前に撮影したビットコインとブロックチェーンの説明の動画です。
ありがとうございます!


(Kevin) #15

It really is very transparent! I guess technically translucent but its very good!

That horizontal line in the bottom of the screen I think is an adhesive bonding the layers together?? On a standard OLED this doesn’t matter because you can’t see it but…

It appears to be in the active matrix layer. The screen is oddly sold as 56 vertical pixels… is it actually 64 pixels, but the last 8 are obscured by the glue? That’s my guess.

This is pretty weird, I would assume there are bonding agents that could be used that are transparent. That idicates to me these screens exist for a specific customer that requested to take the black layer out of the OLED, changing the glue would have required a lot of investment in R&D to figure out what would work in manufacturing process, and if it’s something new they would have to test it in large batches before they knew the yield of a unproven process.

So the customer probably just decided, that’s ok we can block out the bottom 8 pixel area with a shroud.

I am very curious what the application for these are. HUD makes some kind of sense, but I think it would be too close to your face to be viewable? I mean, that’s probably what I’m going to make out of it because the #internet demands it.


(Scott R) #16

It’s like a tiny window to another world in your hand.

Two of those clipped to a baseball cap wired to a power glove should do the trick for awesomeness.


(Kevin) #17

Yah it’s for sure gonna get made into some kind of HUD, I don’t think it will work in practice but it will look cool and maybe even get me an article on hackaday!

Need to learn some CAD so I can 3d print up a head mount enclosure.


(Scott R) #18

These would work well with a monster battle game that used a accelerometer to change the viewing angle.

Something like Digimon x Pokemon go


(Shawn) #19

That would be very odd, I assume the active oled layer physically really only has 56 vertical pixels, just the controller is standard ots and the lower 8 row drives are just not connected. This is a very common practice, for instance a lot of e-ink screens of different resolutions actually use the exact same cog controller, and on the lower resolution screens although you can set the pixel data outside the visible area in memory they physically do nothing. The black adhesive tape probably serves two purposes, to cover the exposed cog controller chip which would otherwise be sensitive to light (dave jones of eevblog fame did a video where using a camera flash on a raspberry pi crashes and resets it because the onboard regulator is a flip chip package without encapsulation). Secondarily it secures the flex to glass bond a bit.


(Kevin) #20

The chip on glass is located under the black epoxy layer, lower down closer to the flexible pin connector. The little gray line of different lengths and different locations and does not have any traces coming in or out of it.

It’s very clear the physical active matrix is displayed over this line. And just from my eyeball measurements, it sure seems like a 2:1 aspect ratio but, yeah I could be off by 8 pixels.

I’m waiting on the board connector to boot one of these up, then we will see.

Very interesting either way! I still can’t think of an effective use case that would warrant it’s manufacture though!