Display device for a portable instrument such as a watch
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United States of America Patent
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Oct 20, 2009
Grant Date -
Dec 6, 2007
app pub date -
May 18, 2007
filing date -
Jun 2, 2006
priority date (Note) -
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Abstract
A display device for a portable instrument includes at least a first transparent or semi-transparent plate arranged on a bottom element. Several closed cavities are formed at least in part in the first plate in the field of view of the device to display information. Each cavity is connected by a respective channel through the bottom element to a tank of colored fluid via feed means for filling or emptying each closed cavity of colored fluid for displaying information. The feed means include at least one micropump connected by an inlet pipe to the colored fluid tank, and microvalves connected to the micropump by a common outlet pipe. Each cavity is directly connected via its respective channel to a corresponding microvalve. The micropump and the microvalves are controlled by electric signals from control means, which can be clocked by a time base in order to control display of time information.
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