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US 6,713,966 B2Granted
Event and arc detection in lamps
AssigneeYazaki North America, Inc.
InventorsGil Shultz, Ben Flaster
Life of this patent
Estimating the term…
Abstract
A power supply system has a battery for supplying power and a lamp having a plurality of filaments therein. Each of the filaments is connected to the battery through a filament power feed line, respectively. A switch is provided on each of the filament power feed line. A fault detection circuit measures a current that flows in a non-active filament and generates a fault signal that shuts off the switch for the filament when the current flows in the non-active filament.
Claims19
A power supply system, comprising:
- a battery for supplying power;
- a lamp having a plurality of filaments therein, each of said filaments connected to said battery through a filament power feed line, respectively;
- a switch provided on each of said filament power feed lines;
- and
- a fault detection circuit measuring a current that flows in a non-active filament of said plurality of filaments and generating a fault signal that shuts off the switch for the filament when the current flows in said non-active filament.
2 more elements
A power supply system, comprising:
- a battery for supplying power;
- a lamp having a plurality of filaments therein, each of said filaments connected to said battery through a filament power feed line, respectively;
- a switch provided on each of said filament power feed lines;
- a measurement means for measuring a voltage measurement across a non-active filament of said plurality of filaments;
- and
- a fault detection means for comparing a reference voltage with said voltage measurement and shutting off the switch for the filament when the voltage measurement is more than a threshold value of said reference voltage.
3 more elements
A power supply system, comprising:
- a battery for supplying power;
- a lamp having a plurality of filaments therein, each of said filaments connected to said battery through a filament power feed line, respectively;
- a switch provided on each of said filament power feed lines;
- a measurement means for measuring a voltage measurement across a non-active filament of said plurality of filaments;
- and
- a fault detection means for comparing a reference voltage with said voltage measurement and attenuating a voltage applied to said filaments when the voltage measurement is more than a threshold value of said reference voltage, without shutting off the filament.
3 more elements
Dependencies are inferred from the claim text.