Conversation
Pavel Machek
pavel
So #banglejs2 display is great at sunlight, but not so great at displaying color.
+/* With backlight on, fujitsu desktop monitor, gimp color picker
+
+ H S V
+ 0 Black is #403f5f 241 33% 37%
+
+ 1 Blue is about #4b6ec0 222 33% 61%
+ 2 Green is #839d68 89 33% 61%
+ 3 "sage green" #7ea581 123 23% 64%
+ 4 Red is about #9d6868 0 33% 61%
+ 5 "muted mauve" #897593 280 20% 57%
+ 6 "sage gray" #cdd5bc 79 11% 83%
+
+ 7 White is cca #a3e8b0 131 30% 91%
Hints how to convert web colors into this base would be welcome. It is 3-bit display, but I can do dithering, I guess...
+/* With backlight on, fujitsu desktop monitor, gimp color picker
+
+ H S V
+ 0 Black is #403f5f 241 33% 37%
+
+ 1 Blue is about #4b6ec0 222 33% 61%
+ 2 Green is #839d68 89 33% 61%
+ 3 "sage green" #7ea581 123 23% 64%
+ 4 Red is about #9d6868 0 33% 61%
+ 5 "muted mauve" #897593 280 20% 57%
+ 6 "sage gray" #cdd5bc 79 11% 83%
+
+ 7 White is cca #a3e8b0 131 30% 91%
Hints how to convert web colors into this base would be welcome. It is 3-bit display, but I can do dithering, I guess...
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dorotaC
dcz@fosstodon.org@pavel The datasheet states contrastration as 15, so it's not so identical :D It's pretty good in the sun.
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Pavel Machek
pavel
@pancake Aha, thanks for the pointer. Yes, that's in related area, and nicely illustrates the problem. Select all black, and you'll get dark blue screen with backlight on, right? About #403f5f. My current hacks are in git@github.com:pavelmachek/Espruino.git (for a pc) and git@gitlab.com:tui/tui.git (bwatch/dithering.js for bangle).
But first thing would be .. I'd really like to understand how that display works and how to properly model it :-).
But first thing would be .. I'd really like to understand how that display works and how to properly model it :-).
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Pavel Machek
pavel
@pancake (and related question is if the quirks of the #banglejs2 display can be used to display more than 125 colors system normally displays).
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pancake 
pancake@infosec.exchange
@pavel with gradients it’s possible to do some nice stuff indeed. How are you analizing the real color? And yes, black is actually dark blue for me too. I wish there was a bangle3 with better case and maybe microphone/speaker or wifi
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Pavel Machek
pavel
@pancake I compared colors against those on my monitor. Not great, but better than trying to get rgb data from webcam.
And yes, speaker would be nice. I believe wifi is too powerhungry. LilyGo t-watch has esp32 (wifi), but that's really different hardware.
You are aware that #banglejs2 can produce (quiet) sound, right? :-).
And yes, speaker would be nice. I believe wifi is too powerhungry. LilyGo t-watch has esp32 (wifi), but that's really different hardware.
You are aware that #banglejs2 can produce (quiet) sound, right? :-).
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pancake
pancake@infosec.exchange
@pavel yes, im aware that it ships a 12V speaker connected to a 5V pinage xD thats why its quiet :3 design issues
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Pavel Machek
pavel
@pancake That's not my understanding, but you can provide current to vibration motor and it produces sound. #banglejs2 :-)
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