Video display terminal with partitioned screen
Patent 4278973 Issued on July 14, 1981. Estimated Expiration Date: 
October 1, 1999. 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.
October 1, 1999. 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 3742482 3872460 Display advance system for a word processor Video display system Patent #: 4204206 InventorsApplicationNo. 06/080732 filed on 10/01/1979US Classes:345/26, Character generator715/790Overlap controlExaminersPrimary: Trafton, David L.Attorney, Agent or FirmInternational ClassesG09G 5/14 (20060101)G09G 1/00 (20060101) Foreign Application Priority Data1978-10-02 GBAbstractA video data display terminal includes a video display, eg., a CRT, and a character buffer for storing character bytes representing characters to be displayed on the screen of the video display device. The terminal further includes microprocessing means for receiving data from a keyboard device connected thereto or alternately from a host processor for entry into the character buffer. The microprocessing means are further adapted to define one or more partitions on the screen of the video display device. Data integrity within these partitions is maintained by assigning margin attribute bytes to the margin of each partition. Refresh hardware including refresh logic control means, a line buffer, a character generator and a serializer is provided to write data within the character buffer to the video display screen. | |
