Subtractive color twisting ball display
Patent 5767826 Issued on June 16, 1998. Estimated Expiration Date: 
December 15, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 15, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3670323 Twisting ball panel display Method of making a twisting ball panel display Light valve including dipolar particle construction and method of manufacture Bodies with reversibly variable temperature-dependent light absorbence Demand and timed renewing imaging media Oil-repellent microvoid-imaging material Imaging media capable of displaying sharp indicia Method of making a rotary ball display device Two color liquid crystal light valve image projection system with single prepolarizer InventorsAssigneeApplicationNo. 572780 filed on 12/15/1995US Classes:345/84, Light-controlling display elements345/107, Particle suspensions (e.g., electrophoretic)359/296Changing position or orientation of suspended particlesExaminersPrimary: Bayerl, Raymond J.Assistant: Suraci, John Attorney, Agent or FirmInternational ClassesG06F 009/32G02F 001/13 AbstractA multilayer substrate material for a subtractive-color electrical twisting ball display. The material is composed of a layered substrate including first, second, and third layers, each layer of the substrate being a nearest neighboring layer with respect to at least one other layer and no more than two other layers. Spheroidal balls are disposed in each of the first, second, and third layers. In the first layer, each ball has at least two component regions including a component region having a first chromatic color, such as transparent cyan. In the second layer, each ball has at least two component regions including a component region having a second chromatic color, such as transparent magenta. In the third layer, each ball has at least two component regions including a component region having a third chromatic color, such as transparent yellow. Optionally, the substrate can further include a fourth layer in which are disposed spheroidal balls, each having at least two component regions including a black component region. Each ball in each layer has an anisotropy for providing an electrical dipole moment, the electrical dipole moment rendering the ball electrically responsive such that when the ball is rotatably disposed in a nonoscillating electric field while the electrical dipole moment of the ball is provided, the ball tends to rotate to an orientation in which the electrical dipole moment aligns with the field. Also disclosed are a twisting-ball apparatus made with the material, and a method for using this apparatus.Other References
Field of SearchLight-controlling display elementsElectroscopic (e.g., movable electrodes or electrostatic elements) Particle suspensions (e.g., electrophoretic) Plural mechanically movable display elements SINGLE DISPLAY SYSTEM HAVING STACKED SUPERIMPOSED DISPLAY DEVICES (E.G., TANDEM) Three-dimensional arrays Liquid crystal display elements (LCD) Changing position or orientation of suspended particles With color formed by different color polarizer or color filter associated with each cell | |
