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US 5,844,364 AGranted
Incandescent light-emitting assemblies
AssigneeSmiths Industries Limited
InventorGeoffrey Beardmore
Life of this patent
Estimating the term…
Abstract
A display has a matrix array of cells formed in a silicon plate and each containing a tungsten strip filament. The cells are filled with a halogen gas and are sealed by a double-glazed window with an infra-red reflecting filter to reflect heat back into the cell while allowing the transmission of visible radiation. The rear of the plate is treated to make it microporous and reduce its thermal conductivity.
Claims20
A light-emitting assembly comprising:
- a lower planar base member having an upper surface with a plurality of etched regions forming a plurality of recesses surrounded by walls, an upper planar transparent window;
- a seal between said window and said base member to define therebetween an array of light-emitting cells;
- a filling of a halogen gas in each said cell;
- and a filament in each cell provided by an uncoiled strip deposited on said upper surface of said base member prior to etching to extend continuously along a row of said cells, said strip being supported on said walls and being unsupported between said walls after etching of said recesses, such that energization of said strip causes unsupported regions of said strip to incandesce and emit light in a halogen cycle.
1 more element
A light-emitting cell comprising:
- an incandescent filament;
- a support for opposite ends of the filament;
- and a window assembly extending above and sealed with said support to enclose the filament between the support and the window, the window assembly including two plates of transparent material separated from one another by an evacuated space, and a filter that transmits visible radiation but reflects infra-red radiation back into the cell.
Dependencies are inferred from the claim text.