Optical switching device
AssigneeKoninklijke Philips Electronics N.V.
InventorsMartin Ouwerkerk, Anna-Maria Janner, Paul Van Der Sluis, Virginie Marie Marguerite Mercier
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Abstract
A description is given of a switching device (1) comprising a transparent substrate (3), a switching film (5) comprising a hydride of scandium and magnesium, covered with a palladium layer (7). By exchange of hydrogen, the switching film can be reversibly switched from a transparent state to a mirror-like state with zero transmission via an intermediate black absorbing state. The conversion between both states is reversible, and this phenomenon can be used, for example, in an optical switching element or sun roof.
Claims18
An optical switching device comprising a substrate and a switching film which comprises a hydride of a trivalent metal and magnesium, which hydrides can be reversibly switched from a low-hydrogen, mirror-like composition to a high-hydrogen, transparent composition by an exchange of hydrogen, characterized in that the trivalent metal comprises scandium.
Switching film comprising a hydride of a trivalent metal and magnesium, which hydrides can be reversibly switched from a low-hydrogen, mirror-like composition to a high-hydrogen, transparent composition by an exchange of hydrogen, wherein the trivalent metal comprises scandium.
Dependencies are inferred from the claim text.