Circuit devices which include light emitting diodes, assemblies which include such circuit devices, and methods for directly replacing fluorescent tubes
An arrangement of a multiplicity of LEDs, drive circuitry, and supporting structure to form a replacement for standard fluorescent tubes without the need to rewire or remove the magnetic or electronic ballasts in use in standard fluorescent fixtures.
1 . A device to replace a fluorescent tube comprising:
a multiplicity of high power LEDs;
a drive circuit to provide operating current to the LEDs
a supporting structure providing heat dissipation for the LEDs
2 . The LED arrangement according to claim 1 matched to the current characteristics of standard magnetic and electronic ballasts.
3 . The LED arrangement according to claim 1 being driven by a circuit comprising a bridge rectifer and filter capacitor
4 . The LED arrangement according to claim 1 being driven by a circuit comprising two bridge rectifiers and filter capacitors.
5 . The LED arrangement according to claim 1 being driven by a circuit containing an over-voltage protection device.
6 . The LED arrangement according to claim 1 being driven by a circuit accepting a pulse-width modulated signal to dim the light output.
7 . The LED arrangement according to claim 1 being driven by a circuit accepting a remote control signal to dim the light output
8 . The LED arrangement according to claim 1 being driven by a circuit providing color temperature control.
9 . The supporting structure according to claim 1 treated with a high infra-red emissivity coating.