h a l f b a k e r yKeep out of reach of children.
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Some clocks are smart enough to dim when you turn out the lights. This is a $10 item that dims the other digital clocks at night.
1) polarized film layer
2) liquid crystal layer preoriented at 90 degrees to the film so it is normally in light-blocking mode
3) cheapo solar cells designed in series
to generate a high enough voltage to disorient the liquid crystal when a light is on.
The cost would all be in the solar cell - similar to the kind used in sidewalk lights.
[link]
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Nice! + Could also be applied to computer screens, which need not be so bright at night. |
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//Could also be applied to computer screens, which need not be so bright at night// |
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Or in the moring... everytime I wake up and turn on the computer I'm blinded when it first comes on. Of course, a cheaper way to do this would have a tinted screen cover (which are quite common) with a hinge on the top so after it comes on and your eyes have adjusted to the ambient light you can just fold it up and over the top of the monitor, out of the way. |
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