Light control element and method of manufacturing the same

Details Light control element and method of manufacturing the same Light control element and method of manufacturing the same

1998-08-13

1999-07-27

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 92, G02F 11333

Patent

active

059299533

ABSTRACT:
In a light control element whose reflection factor or transmission factor varies in response to an external stimulus such as voltage by having layer structure in which the refractive index varies periodically, design is made such that the difference in refractive index between adjacent layers in a reflected state becomes sufficiently great and the half-amplitude level of reflection spectrum becomes sufficiently high. A light control layer is interposed between supporting plates, and the light control layer is obtained by alternately laminating a nonsensitive layer and a sensitive layer in the Z-axis direction.
In the nonsensitive layer, the oriented direction of the liquid crystal is fixed in the X-axis direction, while in the sensitive layer, the liquid crystal is oriented in the X-axis direction. On the supporting plate, a pair of electrodes and facing to each other in the Y-direction are so formed as to extend in a striped shape in the X-axis direction respectively. When voltage is applied between electrodes, the oriented direction of the liquid crystal in the sensitive layer changes into the Y-axis direction.

REFERENCES:
patent: 5204763 (1993-04-01), Hikmet
patent: 5790218 (1998-08-01), Koden et al.
Tanaka et al, Optimization of Holographic PDLC for Reflective Color Display Applications, 267-270, SID, 1995

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