Method of making a twisting ball panel display

Details Method of making a twisting ball panel display Method of making a twisting ball panel display

1976-05-04

1979-03-06

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

264 7, 264232, 264343, B29C 602

Patent

active

041431030

ABSTRACT:
A method of making a display characterized by a plurality of particles which have an electrical anisotropy due to hemispherical surface coatings of different Zeta potential and their distribution in a volume of a dielectric liquid and which also have an optical anisotropy due to the hemispherical surface coatings having different optical characteristics. The particles are mixed with a light transparent liquid which is subsequently cured to form an elastomeric or rigid slab. Following curing of the liquid, the slab is emersed in a plasticizer (dielectric liquid) which is absorbed by the slab and which causes the slab to expand slightly. Expansion of the slab around the particles provides a plasticizer-filled cavity around each particle which cavities allow the particles to rotate to provide a display in accordance with their optical anisotropy but does not allow substantial translation of the particles.

REFERENCES:
patent: 3256374 (1966-06-01), Suzuki
patent: 3616101 (1971-10-01), Satchell
patent: 3928099 (1975-12-01), Ohotsubo et al.
patent: 3928230 (1975-12-01), Unsworth
patent: 4016099 (1977-04-01), Wellman et al.

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