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Does anybody recognize this LCD display FPC and can point me to a datasheet? (Or at least a more searchable model number) (lemmy.world)

submitted 1 week ago* (last edited 1 week ago) by cm0002@lemmy.world to c/askelectronics@discuss.tchncs.de

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Trying to reuse this screen for a project I'm working on (yes I know I can buy another display for cheap, but I hate to waste a perfectly good display that I already have) but I am having difficulty tracking down a datasheet or even just a pin out

The text is "2.4HYDIS171+9325 24PIN", but I've tried searching it 6 ways to Sunday and nothing useful comes up.

I do know that the matching pin out should have the LED anode pin on pin 1, LED K/GND on pin 2 and VCC 3.3v on pin 3. It's also a 2.4" screen and should be a resolution of 240x320

I've probably gone through a million Alibaba listings, and while some get close they just miss the mark

If anyone could help me out that'd be amazing!

Additional pics:

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[–] breakcore@discuss.tchncs.de 8 points 1 week ago (1 children)

My experience is that displays and display drivers are usually very custom, and therefore hard to find breakout boards and even pinouts for.

So I wouldn't get my hopes up too high, but I am happy you asked, since I am myself a big fan of reusing electronics :)

[–] cm0002@lemmy.world 4 points 1 week ago

I'm pretty hopeful, this display is from one of those ultra cheaply made "XXX-in-1" NES on a chip handheld consoles. So chances are there's very little customized and they just grabbed cheap mass produced displays driven by common controllers like ST7789

[–] KryptonNerd@slrpnk.net 4 points 1 week ago

Do you still have the device the screen originally came from?

[–] g5pw@feddit.it 4 points 1 week ago (1 children)

With displays like these, it’s either parallel or SPI. Try to find a chip in the kapton circuit, that is the actual display driver.

Try to find out the FPC pinout, there should be two pins for backlight, find out of there’s any GND, etc… my gut says this is some kind of SPI based controller, 24 pins is too little for a parallel one.

[–] cm0002@lemmy.world 0 points 1 week ago* (last edited 1 week ago)

I did try loading a driver for a commonish chip, ST7789v, and operate under the assumption that it was SPI, but so far nothing but a white screen. I did try cycling through all the pins past pin 7 hoping one of them was the one for MOSI (Driving with a RPi 0)

A lot of those "Close but not quite" SPI displays seemed to share pins like Reset was commonly pin 4 and CS was 5.

I did trace that pin 1 is def BL led + and pin 2 is ground and I'm guessing pin 3 was 3.3v

But so far, nothing but white screen

I tried to peer through the FPC with a bright light looking for a chip, but couldn't find any. Fairly certain it's on that little strip of green PCB but it might be covered by that black goo. The only thing I was able to make out was in that pic with the "T24QV1-S"

I know parallel comes in 8 and 16 bit flavors, so I think there's enough pins for 8 and I could have sworn I saw 24 pin 16 bits listed, but maybe not