Quote:
Originally Posted by rkomar
ICould not the current system be replaced by fixed filters that are cyan, magenta and yellow instead of red, green and blue? I think it could, but I guess it wouldn't really be CMYK because it doesn't overlap the CMY components to get proper subtraction.
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An interesting idea. I was going to dismiss it out of hand, but thinking about it further, it might result in a brighter display, with better contrast between black and white, and brighter colours.
The black would be the same - all pixels off.
The white should be brighter.
With RGBW filters, you get two pixels full red (RW), two pixels full green (GW) and two pixels full blue (BW). (The white pixel counts as full red, green and blue all at once.)
With CMYW filters, you get three pixels full red (MYW), three pixels full green (CYW) and three pixels full blue (CMW). That should be 50% brighter, and only 1/3 less bright than without the filters, instead of 1/2 as bright.
And, with appropriate driving software, it should still be able to display a good colour range, including Red, Green and Blue, as to get Red you'd just need to turn on Yellow and Magenta, for example. It would change the range of colours available - darker colours would be possible on a RGBW filter, I think, than on a CYMW filter. But only being able to have brighter colours when contrast is such a problem would be a bonus, I think.
I suppose eInk must have considered this? Or perhaps I'm overlooking something obvious that would stop it working.