Method of operating a stacked display
Patent 4521775 Issued on June 4, 1985. Estimated Expiration Date: 
January 14, 2003. 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.
January 14, 2003. 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 ReferencesMatrix type liquid crystal display panel Electro-optical analog digital display Matrix electrode structure in a multi-layer matrix type liquid crystal display Fail transparent LCD display with backup Heating device with separate display means for the types of data entered Patent #: 4399352 InventorAssigneeApplicationNo. 06/458084 filed on 01/14/1983US Classes:345/4, SINGLE DISPLAY SYSTEM HAVING STACKED SUPERIMPOSED DISPLAY DEVICES (E.G., TANDEM)345/50, Liquid crystal elements349/83With each cell displaying a different patternExaminersPrimary: Curtis, Marshall M.Attorney, Agent or FirmInternational ClassesG09G 3/36 (20060101)G02F 1/13 (20060101) G02F 1/1347 (20060101) G02F 1/1345 (20060101) AbstractTwo levels of liquid crystal material and upper, center and lower transparent members are sandwiched to form a stacked display. Segment electrodes, which are disposed on opposite sides of the center transparent member, are controllable to selectively display information in one of the two levels while the other level is caused to remain transparent. By applying different waveforms to the levels, one level can be energized while the other is held inactive. | |
