Multilayered display having two displays in series and a switcha

Details Multilayered display having two displays in series and a switcha Multilayered display having two displays in series and a switcha

1996-02-28

1996-12-10

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Interconnection of plural cells in series

349 74, 349117, 349100, G02F 11347, G02F 11335

Patent

active

055836747

ABSTRACT:
A display arrangement comprises an image intensifier tube or some other device which provides a representation of a viewed scene at an input. A supertwist LCD and associated polarizers and are located between the input and a viewer. A ferroelectric liquid crystal shutter is located between the LCD and second polarizer and is controlled to produce symbology. By switching the shutter the polarization of the incident radiation is switched between two states differing by 90.degree.. This causes the LCD to operate in two states. In one state the viewed scene is transmitted through the LCD and in the other state it is absorbed and any symbology on the LCD is contrasted with a dark absorbing background. The shutter is switched sufficiently quickly that the viewer perceives the symbology overlaid on the viewed scene. In another arrangement, lens means having focusing properties which are dependent on the incident polarization is included to allow switching between different display modes.

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