Electroordered dipole suspension
First Claim
1. An electrodichroic composition of matter comprising a fluid suspension of asymmetric electrically charged conductive particles in an insulating surfactant fluid, said electrically charged particles producing an electrostatic field mutually repelling said particles, said fluid suspension having a resistivity exceeding 1010 ohm-cm, said fluid suspension having a layer thickness of 3-50 μ
- m, said fluid suspension layer having a particle concentration such that the ratio of random optical density to thickness in micrometers is between 0.08 and 0.8, a constant amplitude alternating electric voltage, said voltage being applied across said layer, said voltage being such as to produce an electrodichroic ratio of 6 to 40, where said particles form an electroordered array without particle coagulation in said fluid.
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Abstract
An electrodichroic composition of matter comprising a concentrated suspension of submicron conductive particles in an insulating fluid which, upon the application of a strong electric field to the suspension, exhibits a new electroordering effect with greatly improved electrooptical properties. A novel process is described for increasing the resistivity of a dipole suspension. Improved electrooptical panels and displays can be made with compositions which comprise a suspension of submicron asymmetric particles of graphite, molybdenum disulfide, metals such as aluminum, or dichroic crystals such as Herapathite in an insulating fluid.
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Citations
31 Claims
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1. An electrodichroic composition of matter comprising a fluid suspension of asymmetric electrically charged conductive particles in an insulating surfactant fluid, said electrically charged particles producing an electrostatic field mutually repelling said particles, said fluid suspension having a resistivity exceeding 1010 ohm-cm, said fluid suspension having a layer thickness of 3-50 μ
- m, said fluid suspension layer having a particle concentration such that the ratio of random optical density to thickness in micrometers is between 0.08 and 0.8, a constant amplitude alternating electric voltage, said voltage being applied across said layer, said voltage being such as to produce an electrodichroic ratio of 6 to 40, where said particles form an electroordered array without particle coagulation in said fluid.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
Specification