Device that includes a motion sensing circuit
First Claim
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1. A dispensing device, comprising:
- a dispenser configured to dispense a volatile material;
a sensor configured to detect an environmental condition;
a nonlinear circuit element coupled to the sensor to establish a bias point, wherein a voltage level at the bias point varies nonlinearly with respect to a current that flows through the sensor, and wherein the current that flows through the sensor represents the environmental condition; and
a controller coupled to the bias point, wherein the controller controls the dispenser to dispense the volatile material in response to the environmental condition.
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Abstract
A dispensing device includes a dispenser configured to dispense a volatile material, a sensor configured to detect an environmental condition, and a nonlinear circuit element coupled to the sensor to establish a bias point. A voltage level at the bias point varies nonlinearly with respect to a current that flows through the sensor, wherein the current that flows through the sensor represents the environmental condition. The dispensing device further includes a controller coupled to the bias point. The controller controls the dispenser to dispense the volatile material in response to the environmental condition.
42 Citations
20 Claims
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1. A dispensing device, comprising:
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a dispenser configured to dispense a volatile material; a sensor configured to detect an environmental condition; a nonlinear circuit element coupled to the sensor to establish a bias point, wherein a voltage level at the bias point varies nonlinearly with respect to a current that flows through the sensor, and wherein the current that flows through the sensor represents the environmental condition; and a controller coupled to the bias point, wherein the controller controls the dispenser to dispense the volatile material in response to the environmental condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A dispensing device, comprising:
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a dispenser configured to dispense a volatile material; a phototransistor; a diode coupled to the phototransistor to establish a bias point, wherein a voltage level at the bias point varies nonlinearly with respect to a current that flows through the phototransistor; a band-pass filter coupled to the bias point to attenuate high and low frequency conditions; and a controller coupled to the bias point via the band-pass filter, wherein the controller controls the dispenser to dispense the volatile material in response to a fluctuation in the voltage level at the bias point. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of dispensing a volatile material, comprising the steps of:
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detecting an environmental condition with a photocell; coupling a nonlinear circuit element to the photocell to establish a bias point therebetween, wherein a voltage level at the bias point varies nonlinearly with respect to a current that flows through the photocell; and dispensing a volatile material in response to a transition in the voltage at the bias point. - View Dependent Claims (17, 18, 19, 20)
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Specification