Wearable device with power state control
First Claim
1. An apparatus, comprising:
- a housing;
anda power state control module disposed in the housing, wherein the power state control module includes;
a piezoelectric device that is responsive to an input, wherein the input comprises an external pressure to be applied to the piezoelectric device, wherein the piezoelectric device is to generate an electric charge in response to the input;
a rectification circuit coupled with the piezoelectric device, to limit a voltage level corresponding to the electric charge generated by the piezoelectric device;
a capacitor coupled with the rectification circuit, to store the electric charge supplied by the piezoelectric device, with the limited voltage level, wherein the rectification circuit includes a first diode provided in parallel to the capacitor, to establish the voltage level on the capacitor, and a second diode provided in series with the first diode, with a breakdown voltage corresponding to the voltage level to be established on the capacitor; and
a power state control interface circuitry coupled with the capacitor, wherein the power state control interface circuitry, after a voltage level has been established on the capacitor in response to the storage of the electric charge, is to generate a command to cause the apparatus to transition from a first power state to a second power state that is different from the first power state, wherein the power state control interface circuitry includes a comparator powered by the capacitor, and an arrangement of resistances, wherein at least one of the resistances is provided in series with the first diode, to cause the comparator to trigger the command when the voltage level has been established on the capacitor.
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Accused Products
Abstract
Embodiments of the present disclosure provide techniques and configurations for a wearable device with power state control. In one instance, the device a functional module to operate in a first power state or in a second power state that is different from the first power state; a power source coupled with the functional module to provide operational power to the functional module; and a power state control module coupled with the functional module, to cause the functional module to transition from the first power state to the second power state in response to an input. The power state control module may comprise a power generating device to generate power responsive to the input, independent of the power source, and in response to the generated power, cause the functional module to transition from the first power state to the second power state. Other embodiments may be described and/or claimed.
22 Citations
13 Claims
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1. An apparatus, comprising:
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a housing; and a power state control module disposed in the housing, wherein the power state control module includes; a piezoelectric device that is responsive to an input, wherein the input comprises an external pressure to be applied to the piezoelectric device, wherein the piezoelectric device is to generate an electric charge in response to the input; a rectification circuit coupled with the piezoelectric device, to limit a voltage level corresponding to the electric charge generated by the piezoelectric device; a capacitor coupled with the rectification circuit, to store the electric charge supplied by the piezoelectric device, with the limited voltage level, wherein the rectification circuit includes a first diode provided in parallel to the capacitor, to establish the voltage level on the capacitor, and a second diode provided in series with the first diode, with a breakdown voltage corresponding to the voltage level to be established on the capacitor; and a power state control interface circuitry coupled with the capacitor, wherein the power state control interface circuitry, after a voltage level has been established on the capacitor in response to the storage of the electric charge, is to generate a command to cause the apparatus to transition from a first power state to a second power state that is different from the first power state, wherein the power state control interface circuitry includes a comparator powered by the capacitor, and an arrangement of resistances, wherein at least one of the resistances is provided in series with the first diode, to cause the comparator to trigger the command when the voltage level has been established on the capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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placing a piezoelectric device in a housing of a wearable device, wherein the piezoelectric device is to generate an electric charge in response to an input;
coupling a rectification circuit with the piezoelectric device, to limit a voltage level corresponding to the electric charge generated by the piezoelectric device, including providing a first diode and a second diode in series with the first diode;coupling a capacitor with the rectification circuit, to store the electric charge supplied by the piezoelectric device, including providing the capacitor in parallel to the first diode, to establish the voltage level on the capacitor, and providing the second diode in series with the first diode, wherein a breakdown voltage of the second diode corresponds to the voltage level to be established on the capacitor; and connecting a power state control interface circuitry with the capacitor wherein the power state control interface circuitry, after a voltage level has been established on the capacitor in response to the storage of the electric charge, is to generate a command to initiate a transitioning of the wearable device from a first power state to a second power state, wherein the first power state is different from the second power state, wherein the connecting the power state control interface circuitry includes providing a comparator powered by the capacitor, and further providing an arrangement of resistances, including placing at least one of the resistances in series with the first diode, to cause the comparator to trigger the command when the voltage level has been established on the capacitor. - View Dependent Claims (12, 13)
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Specification