Back to results
US 2021/0282244 A1Published application
Hybrid led / photoluminescent signs
AssigneeEcoglo International Limited
InventorsRoger MCKENZIE, Trevor DIMOND
Life of this patent
Estimating the term…
Abstract
The invention relates to photoluminescent signs, in particular to signs in which one or more light emitting diodes (LEDs) emit light that excites one or more photoluminescent (PL) elements. In one aspect, a sign may include one or more photoluminescent elements; one or more light emitting diodes (LEDs) arranged to excite the one or more photoluminescent elements; and circuitry arranged for connection to an AC power supply and supplying power to the LEDs.
Claims17
1-22. (canceled)
A sign including:
- one or more photoluminescent elements;
- one or more light emitting diodes (LEDs) arranged to excite the one or more photoluminescent elements;
- and
- circuitry arranged for connection to an AC power supply and supplying power to the LEDs, the circuitry including:
- an AC circuit portion receiving power from the AC power supply, and including transient suppression components selected from at least two capacitors and at least two resistors that the AC power passes through, the transient suppression components being arranged to suppress transients in power received from the power supply;
- a rectifier arranged to receive and rectify transient-suppressed power;
- and
- a DC circuit portion receiving rectified power from the rectifier and passing the rectified power to the LEDs, the DC circuit portion being free of electrolytic capacitors and free of transient suppression components.
5 more elements
Dependencies are inferred from the claim text.