h a l f b a k e r yExtruded? Are you sure?
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As you pass your fingers or hand over the board,
each
ball turns to show a different color.
If the board itself is transparent the other side
would
be some "mirror image" all the more interesting.
Comes with a magnifying glass, so you correct the
drawing "pixel by pixel".
If each
ball has a ridge on it, allowing it only to move
in three directions and stopped when reaching a
certain angle then the angle you draw at will set the
color.
Another option is to have the balls heavier on one
color so that shaking the box (which should make for
a
nice sound too) will "clear" the last image.
Of course the more expensive models will have a
"send
image to smartphone" so that your genius kid's work
is
saved forever.
A Better Electro-Me...l Billboard Display
[xaviergisz, Jun 17 2014]
Promotional pivoting paper pixel panoply
[xaviergisz, Jun 17 2014]
US3036388
http://www.google.c...u/patents/US3036388
[xaviergisz, Jun 17 2014]
[link]
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Can you explain the geometry that allows only the
blue, red, green, black or white halves of a sphere to
be visible? |
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If each ball is held in a plastic dimple, a lens could show many colors. Say 6 or 8 colors depending on the optic design. The working side would show several colors, but the viewing side would show the color unseen. If only black and white, the working side would be a b/w negative of the viewing side. |
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An 8 by 8 array (say 64 .25" dia balls) would make an interesting cheap toy. If drop kicked, there would be little multicolored balls all over the place. |
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the geometry is a sphere. The topology is that of a
cube. |
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The problem with this as playground equipment is that some cerebral 6 year old would spend a half hour making an image, and then her 3 year old brother would rub it strenously from the other side. |
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