Patent Number: 6,310,725

Title: Optical switching device

Abstract: A description is given of a switching device (1) comprising a transparent substrate (3) and a switching film (5) which incldes a hydride of a trivalent metal, such as gadolinium, and which is covered with a palladium layer (7). Between the substrate (3) and the switching film (5) a thin magnesium layer (4) is interposed. By exchange of hydrogen, the switching film can be reversibly switched from a transparent state to a highly reflective state. The conversion between both states is reversible, and this phenomenon can be used, for example, in a luminaire or for climate control.

Inventors: Duine; Peter Alexander (Eindhoven, NL), Van Der Sluis; Paul (Eindhoven, NL)

Assignee: U.S. Philips Corporation

International Classification: G02F 1/01 (20060101); G02F 1/19 (20060101); G02F 1/15 (20060101); G02B 006/26 (); G02B 001/10 ()

Expiration Date: 10/30/2018