Spatial light modulator and a neural network circuit

Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition

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359 75, 359 76, G02F 11337

Patent

active

054438640

ABSTRACT:
The present invention relates to a spatial light modulator used for an optical computing system or display, which comprises a photoconductive layer having a rectification function for receiving incident lights to generate charges, an electrode for accumulating the charges and a ferroelectric liquid crystal layer for modulating the incident light according to bias voltage change with the accumulated charges, wherein the ferroelectric liquid crystal layer is arranged between a pair of alignment layers made of polyimide represented by the general formula (I); ##STR1## wherein n is 2 or more, X is O, S, Se or Te, Y is an aromatic group or a substituted aromatic group, and Z is a group containing an aromatic group. In the spatial light modulator, any charges are not accumulated on the alignment layer with the driving time and thus a bistable memory condition can be realized.

REFERENCES:
patent: 5046822 (1991-09-01), Matsuda et al.
patent: 5130830 (1992-07-01), Fukushima et al.
patent: 5135678 (1992-08-01), Murata et al.

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