Electrical power control of a field emission lighting system
AssigneeLightlab Sweden AB
InventorQiu-Hong Hu
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Abstract
The present invention relates to a field emission lighting arrangement, comprising an anode structure at least partly covered by a phosphor layer, an evacuated envelope inside of which an anode structure is arranged, and a field emission cathode, wherein the field emission lighting arrangement is configured to receive a drive signal for powering the field emission lighting arrangement and to sequentially activate selected portions of the phosphor layer for emitting light. The same control regime may be applied to an arrangement comprising a plurality of field emission cathodes and a single field emission anode. Advantages with the invention includes increase lifetime of the field emission lighting arrangement.
Claims14
A field emission lighting arrangement, comprising:
- an anode structure at least partly covered by a phosphor layer;
- a field emission cathode;
- an evacuated envelope inside of which the anode structure and the field emission cathode are arranged;
- a power supply and control unit, electrically connected to the anode structure and the field emission cathode and configured to provide a drive signal for powering the field emission arrangement;
- and
- wherein the drive signal comprises a control signal configured to sequentially activate selected portions of the phosphor layer for emitting light by controlling the direction of the electron emitted by the first emission cathode.
Dependencies are inferred from the claim text.