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  • This is mostly for @Numerist but others might be interested. The reason for 64 colours rather than something smaller, like 16, is due to the way colours work. Displays produce colours using red/green/blue sub-pixels. For the Bangle2, these three sub-colours are 1-bit meaning the total colours produced are 2^(3*1)=8. For the Pebble Time the sub-colours are 2-bit (just 1 more bit each) and the total colours are 2^(3*2)=64.

    I suppose a display manufacturer could take inspiration from digital cameras and come up with something based on a Bayer filter - 1 bit for red, 1 bit for blue and 2 bits for green: 4 bits total per pixel or 2^4=16. I've never heard of anything like that, though, and suspect the Pebble Time screen is the simplest next step up from what the Bangle 2 has.

    Oh, and -several million for a round display. If you want a smart watch over a regular watch, you're wanting to display information - text. There's a very good reason your phone, PC, and even books all have rectangular displays and not circular ones.

  • An interesting idea, Andrew. The Bayer filter concept makes sense, but could there be a CMYK version of that concept? As comfortable as I am working/thinking in RGB, LCDs work on the principle of subtractive color, so perhaps we could get more out of an LCD display by thinking in terms of the subtractive model. Of course that would mean finding a manufacturer who
    produces that type of screen. Do CMYK LCD displays even exist?


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