End-of-life bulb circuitry
First Claim
Patent Images
1. An end-of-life LED light bulb comprising:
- an LED light bulb;
a microcontroller having a circuit configured to detect operational time of the bulb;
wherein the microcontroller is configured to disable the bulb upon reaching a preset amount of operational time and wherein the circuit is configured to compare an output of the circuit with a reference value; and
wherein the reference value is randomly adjusted at production time.
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Abstract
An LED light bulb which turns itself permanently off when it reaches the end of its useful life, and more particularly, to a scheme which slightly varies the end-of-life condition from unit to unit.
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Citations
7 Claims
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1. An end-of-life LED light bulb comprising:
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an LED light bulb; a microcontroller having a circuit configured to detect operational time of the bulb; wherein the microcontroller is configured to disable the bulb upon reaching a preset amount of operational time and wherein the circuit is configured to compare an output of the circuit with a reference value; and wherein the reference value is randomly adjusted at production time.
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2. An end-of-life LED light bulb comprising:
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an LED light bulb; a microcontroller having a circuit configured to detect operational time of the bulb; wherein the microcontroller is configured to disable the bulb upon reaching a preset amount of operational time and wherein the microcontroller includes a non-volatile memory; wherein the circuit is configured to compare an output of a counter with a reference value; and wherein the reference value is randomly adjusted at production time.
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3. An end-of-life detecting light emitting diode (LED) light bulb comprising:
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a shell; a base connected to the shell, the base configured to receive an alternating current (AC); an LED within the shell; a microcontroller having a circuit, the circuit configured to detect operational time of the bulb, wherein the microcontroller is connected to the LED and wherein the microcontroller is configured to receive a rectified AC input based on the AC; wherein the microcontroller disables the bulb based on reaching a preset amount of operational time; and wherein the microcontroller is configured to compare a counter value with a reference value, the reference value is randomly adjusted at production time. - View Dependent Claims (4, 5, 6, 7)
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Specification