초록 ▼

An inductively powered lamp unit 806 is fixed onto a substrate and over a position where a primary inductive loop 803 is spread apart (as at 807). At such sites, a horizontal (or at least parallel to the surface of the substrate) component of alternating magnetic flux is available. The conductors of

An inductively powered lamp unit 806 is fixed onto a substrate and over a position where a primary inductive loop 803 is spread apart (as at 807). At such sites, a horizontal (or at least parallel to the surface of the substrate) component of alternating magnetic flux is available. The conductors of the loop 802-803 can be inserted in a slit 804 cut into the substrate. The spreading apart of the conductors may be ensured with a spreader 808. A power supply 801 may be a resonant supply operating at 40 kHz. The lamp unit 806 does use a resonant pickup coil which can be shorted so as to minimize coupling, and provide supply regulation. The lamp unit can be controlled by signals transmitted over the primary loop. Applications include roadway markers and fire escape egress indicators, and underwater lighting.

대표청구항 ▼

1. A method of supplying electricity to a discrete lamp unit, comprising the steps of:forming a hole in stationary material; positioning in the hole wiring capable of generating an alternating inductive magnetic field outside the hole when an alternating electrical current is passed through the wiri

1. A method of supplying electricity to a discrete lamp unit, comprising the steps of:forming a hole in stationary material; positioning in the hole wiring capable of generating an alternating inductive magnetic field outside the hole when an alternating electrical current is passed through the wiring; covering the wiring in the hole; and positioning remote from the wiring the discrete lamp unit which is adapted to provide illumination when energized inductively with an induced alternating electrical current generated by the inductive magnetic field.