Liquid crystal display device with visibly imperceptable spacers

Stock material or miscellaneous articles – Composite – Of bituminous or tarry residue

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350344, 428 1, G02F 1133

Patent

active

044913915

ABSTRACT:
A display device for displaying light characters against a dark background, particularly a liquid-crystal display. It has a fluid which can be switched between two optically different states located between two support plates (1, 2) which are parallel to each other. On one of the facing surfaces of the support plates there is applied an insulating layer of fixer which contains the spacer elements (7). The support plates (1, 2) are maintained at a given distance from each other by these spacers (7). Furthermore, a polarizer (11, 12) is associated with each support plate (1, 2). In order to assure a strong contrast between the character and its background with precise maintenance of the distance between the support plates (1, 2), the insulating layer of fixer completely covers the support plate (1) and the spacer elements (7) consist of a material of dark color.

REFERENCES:
patent: 3840695 (1974-10-01), Fischer
patent: 4231034 (1980-10-01), Bechteler
patent: 4248502 (1981-02-01), Bechteler et al.
patent: 4249800 (1981-02-01), Spruijt
patent: 4341445 (1982-07-01), Matsuyama et al.

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