Windowing and scrolling for a cathode-ray tube display
June 11, 2004. 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 3683359 3792462 3903510 Control device for video display module Control means to provide slow scrolling positioning and spacing in a digital video display system Partial scrolling video generator Scrolling display refresh memory address generation apparatus Display controller for multiple scrolling regions Display system with multiple scrolling regions Pictorial information processing technique InventorsAssigneeApplicationNo. 06/619373 filed on 06/11/1984US Classes:345/686, Memory addressing345/28AddressingExaminersPrimary: Krass, Errol A.Assistant: Laibowitz, Danielle Attorney, Agent or FirmInternational ClassesG09G 5/34 (20060101)G09G 5/14 (20060101) AbstractA method and a circuit for producing an independent scrollable display region (sometimes referred to as a "window") on the face of a cathode-ray tube (CRT) in a bit-mapped data display system is disclosed. Circuitry is provided to detect the presence of the window along a vertical axis and to detect the presence of the window along a horizontal axis. When both a vertical and a horizontal presence are detected simultaneously, a window is deemed to be present. When the window is deemed to be present a memory address selection circuit selects memory addresses from one memory address circuit and when the window is deemed to be not present, the memory address selection circuit selects memory addresses from another memory address circuit. | |
