Fluorescent lamp drive and a protection circuit therein
AssigneeLecip Holdings Corporation
InventorsYoshikazu SUMI, Takuhiro TANASE
Life of this patent
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Abstract
An LED lighting circuit mounted in a lighting device having LEDs as a light source, the circuit including: a light emitting unit that includes a plurality of LED circuits for supplying drive currents to a plurality of LEDs connected in series or parallel; a failure detection unit that detects whether each of the drive currents flowing through the plurality of LED circuits is equal to or larger than a predetermined fault current value for those LED circuits as a whole; and a failure alert unit that performs a predetermined alert operation if the failure alert unit detects that at least one of the drive currents is equal to or larger than the predetermined fault current value.
Claims6
An LED lighting circuit mounted in a lighting device that has a plurality of LEDs connected in series or parallel as a light source comprising:
- a light emitting unit that includes a plurality of LED circuits supplying drive currents to the plurality of the LEDs;
- a failure detection unit that detects whether the drive currents flowing through each of the LED circuit is equal to or larger than a predetermined fault current value respectively;
- and
- a failure alert unit that performs a predetermined alert operation if the failure alert unit detects that at least one of the drive currents is equal to or larger than the predetermined fault current value.
Dependencies are inferred from the claim text.