Thread: Astak Mentor eBook readers with WiFi and Touchscreen (read-only)
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Old 05-18-2009, 03:37 PM   #2054
wallcraft
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Join Date: Mar 2006
Location: Mississippi, USA
Device: Kindle 3, Kobo Glo HD
Quote:
Originally Posted by Robertb View Post
PVI does not make any panel higher than 4 levels of grey scale.
The Vizplex EInk film supports at least 16 grey levels, and so does the PVI screen made with that film. It is the controller which limits older devices to 4 grey scales. We know the Epson Broadsheet controller can handle 8 and 16 grey levels because this is actually done by the Sony PRS-700 and Amazon Kindle 2 repectively. The original Apollo controller (EZ Reader, Kindle 1) only supports 4 level greyscale. The Metronome controller also supports 8 level greyscale, but it is only used in the Sony PRS-505 so far as I know.
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