Sealed enclosure for a wire-grid polarizer and subassembly for a display system
AssigneeKoninklijke Philips Electronics N.V.
InventorRobert Harvey Kane
Life of this patent
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Abstract
The sensitive, active surface of a wire-grid polarizer is protected from degradation by ambient environments by incorporating the component in a non-reactive atmosphere maintained by a sealed enclosure. The enclosure may provide a unitary mounting system for the polarizer, a liquid crystal light modulation panel and a projection lens to form a last-stage sub-assembly for a projection display system.
Claims13
A light polarizing device comprising:
- a polarizing element having an optically transparent substrate, an environmentally sensitive polarizing element on the substrate, and a sealed enclosure surrounding the polarizing element, the enclosure having a non-reactive atmosphere to protect the polarizing element from the ambient environment.
A light polarizing device comprising:
- an optically transparent substrate, an environmentally sensitive polarizing element on the substrate, an optically transparent cover sheet, a plurality of spacers distributed around the periphery of the device and supporting the cover sheet on the substrate above the element, sealant extending around the periphery of the device between the substrate and the cover sheet, and non-reactive atmosphere filling the interior space between the substrate and the cover sheet and protecting the environmentally sensitive polarizing element.
A sealable housing for use in a sub-assembly for a display device, the sealable housing comprising mounting apertures for optical elements.
A sub-assembly for a display device comprising a sealable housing 40 having first, second and third mounting apertures, a light polarizing element having an environmentally sensitive active surface, the light polarizing element sealed into the first aperture, a light modulator panel sealed into the second aperture and a lens sealed into the third aperture.
Dependencies are inferred from the claim text.