Display assembly with contrast inversion including two...

Liquid crystal cells – elements and systems – Liquid crystal system – Liquid crystal for recording or imaging on photosensitive...

Reexamination Certificate

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Details

C349S073000, C349S074000, C368S030000, C368S242000, C368S327000

Reexamination Certificate

active

06903784

ABSTRACT:
A second device (24) is mounted on a first device (22) formed of a liquid crystal (27) display cell (26) at the front of which is arranged a first linear polarizer (40), of a liquid crystal (29) optical valve (28) at the back of which is arranged a second polarizer (44) and means (23) for controlling the valve (28) and the cell (26) from a switched state to a non switched state. When the cell (26) is switched to display a data item, by associating a first light or dark device (22) with a second absorbent or reflective polarizer (44), an inversion of the contrast in said data is obtained by switching the valve (28).

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