The screen obtainable determines the dimensions of the watch. I want to have a screen larger than 2 inches, but it seems that any solution that exceeds 65mm in any axis would become bulky for my 50x42mm arm. The main requirement is low power consumption for an always-on-display and >=30Hz (ideally > 60) refresh .
I actually started thinking about this project again because I found this screen on AliExpress:
It's in the description that I found out about Memory LCD.
Moving on, this is the OLED I eventually found:
Like the first OLED, it's a MIPI device. That makes it questionable if I can drive the display since it seems MIPI documentation is a guarded secret or something. The screen should be around 54.7x41mm, so it's still a tad on the small side.
Back to the reflective LCD, I found some more data on an Alibaba listing.
A 80mm long watch (76 + 2mm bezels) might be a bit of a stretch, but everything else sounds pretty good if I can actually buy it. It doesn't look like there's much availability on the internet.
Since it wasn't my project, I didn't put much time into evaluating the site. My quick impression was that it probably had enough info to make something work, but it wasn't pretty dense and might not be the easiest to follow. Maybe it's enough for you though, I've been pretty impressed with your grasp of dense info in these logs.
Thanks for the compliment. While the info is sparse, it does look easier to follow than when I was researching MIPI CSI for trying to use an OV4689 directly.
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... I was just talking to someone on the adafruit discord about MIPI... that wasn't you was it? Just in case it's not, this is what I found for them:
https://focuslcds.com/mipi-display-serial-interface-dsi/
I assume you've already seen this, since I found it with like 10 seconds of searching for them.
Are you sure? yes | no
No I'm not in the adafruit discord and no I haven't seen it. The last time I searched was probably a few years ago.
Are you sure? yes | no
Since it wasn't my project, I didn't put much time into evaluating the site. My quick impression was that it probably had enough info to make something work, but it wasn't pretty dense and might not be the easiest to follow. Maybe it's enough for you though, I've been pretty impressed with your grasp of dense info in these logs.
Are you sure? yes | no
Thanks for the compliment. While the info is sparse, it does look easier to follow than when I was researching MIPI CSI for trying to use an OV4689 directly.
Are you sure? yes | no