Lighting device

The lighting device addresses high-frequency noise by integrating a ferrite core within its housing to convert noise into heat, effectively reducing noise leakage and ensuring compliance with noise standards.

JP7863781B2Active Publication Date: 2026-05-22PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Filing Date
2022-06-13
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Conventional lighting devices generate high-frequency noise due to DC/DC converters, which is not effectively mitigated.

Method used

The lighting device incorporates a ferrite core within its housing to suppress high-frequency noise by converting it into heat through eddy currents, utilizing a housing that houses the light source and lighting circuit, with the ferrite core positioned to absorb noise along the electrical path.

Benefits of technology

The device effectively reduces high-frequency noise leakage by absorbing it into the ferrite core, ensuring compliance with noise standards and efficient noise management.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To reduce high-frequency noise.SOLUTION: A lighting device A1 comprises an LED 10, a lighting circuit 20 for lighting the LED 10, and a box body 3 for accommodating the LED 10 and the lighting circuit 20. The lighting circuit 20 has an input-side electric wire 21 for supplying electricity from the outside, and a ferrite core 22 for suppressing high-frequency noise flowing in the electric wire 21. The ferrite corer 22 is accommodated in the box body 3. By this constitution, the lighting device A1 can reduce the high-frequency noise by converting the high-frequency noise flowing in the electric wire 21 into heat at the ferrite core 22, and consuming the heat as an eddy current loss.SELECTED DRAWING: Figure 3
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