System for illuminating the display of a wrist watch
OwnerLeonard R. Kahninventor
Life of this patent
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Abstract
A system for illuminating the display of a wrist watch by motion of the wrist. The watch incorporates means for sensing a specific motion of the watch and the sensing means is connected to means to cause the digital display to become active (illuminated). Storage means is provided for illuminating the display for a 5 second interval so that the user may conveniently read the display. Additional circuitry for displaying the day and month is described.
Claims10
A watch display system comprising;
- a specific motion sensor,
- a first storage means activated by the motion sensor for maintaining illumination of the display for a sufficient reading period after each perception of said motion,
- means for connecting an electrical energy source to the display where said connecting means is controlled by the first storagge means,
- a second storage means having an appreciably longer storage period than the first storage means and which second storage means is also activated by the motion sensor,
- And gate means for sensing repeated specified motion within a specified period of time, and
- means for switching the display system from time of day information circuitry to day/month circuitry when the AND circuitry output indicates the occurrence of the repeated specified motion within said longer storage period of time.
A system for illuminating the display of a wrist watch which displays the time of day and the date information comprising;
- means for sensing a predetermined motion of the watch,
- means activated by the motion sensing means for illuminating the display to display time of day information,
- means for timing the period between the occurrence of the first predetermined motion and a repeated predetermined motion of said sensing means,
- means responsive to timing means for connecting the date information to the display only if the repeated predetermined motion occurs within a particular period following a first predetermined motion of the watch, and
- said activated means illuminating the display when the date information is connected to said display.
A wrist watch control system for displaying the time of day and the month/day at different instances comprising;
- an inertia type switch for sensing the predetermined motion of the wrist,
- means including a first storage circuit activated by the inertia activated switch to cause illumination of a display for a period sufficient to read the time information conveniently,
- a second storage circuit having a second period appreciably longer than the first storage circuit and activated by the inertia switch,
- And means for sensing the reactivation of the inertia switch during a period when the second storage means is still in an active state,
- means for switching the display circuitry from the time of day display system to the day/month system when said switching means is activated by an AND circuitry.
A system for illuminating the display of a wrist watch incorporating means for sensing a predetermined motion of the watch, said sensing means comprising an electrical contact which closes when the predetermined motion is sensed and connects voltage to a storage capacitor, the storage capacitor in turn is connected to a gate of a field effect transistor which, when fed sufficient gate voltage, passes current to the display causing the display to illuminate.
Dependencies are inferred from the claim text.