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The A51 is an A5 sized reading device, based on an A5 sized
TFT display E Ink custom made for a Japanese customer in
2004. The name A51 comes from the fact that this is the #1
demo made from the A5 panel, A5-1 -> A51. Also it is strange
and thin and large and mysterious, like a UFO you might see
over Area 51.
E Ink's first active matrix product was a 6 inch diagonal
800x600 display, and is available in the market. This is the
display used in the Sony
Librie (currently available only in Japan). This screen is
nice for reading books and other content that can be paginated
relatively easily or can be fomatted for a smaller display
(like novels, manga, etc.). However, sometimes it might be
desirable to have a larger display area for content which is
not easily reduced to SVGA resolution or which would be hard
to break across multiple pages. This might be useful for
things like:
- Textbooks
- Reference books
- Office documents
- Technical diagrams
- Sheet music
- Magazines
- Maps
For this type of application, trading off extra cost and reduced
portability for more area and pixels on the display might make
sense. The active area on this display conforms to the A5 ISO
paper size (almost), with approximately a 10 inch diagonal and
1280x900 pixels, which yields a spatial resolution of about
155ppi.
I presented a paper on this display system at the SID 2005
Conference in Boston. You can download the pdf in the paper
section.
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Design partially original and partially ripped off from other websites
by Holly Gates
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