Optical display arrangements

Details Optical display arrangements Optical display arrangements

C - Chemistry, Metallurgy

09

K

345/8

C09K 11/04 (2006.01) G02F 1/13357 (2006.01) G04G 9/00 (2006.01) H01L 33/00 (2006.01)

Patent

CA 1108737

Abstract of the Disclosure The present invention relates to an arrangement comprising a light valve, in particular a liquid crystal cell, having a light trap in the form of a fluorescent body which is made from a material having a refractive index greater than 1 and containing fluorescent particles and an auxiliary illumination source. The arrangement according to the present invention provides that the auxiliary illumination source contains a radio-active sub- stance as well as a luminous material adapted to be activated by the substance. The radio-active substance may be selected in particular from among weak .beta.- ray emitters, such as for example tritium. The main field of use of the arrangement is in battery-operated indicating instruments, in particular wrist-watches.

296925

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