| 摘要 |
Computer (1) graphic data copied into first computer memory (13), is altered by user or computer program. Data is continually compared section-wise with last copy (12) in computer memory (13). If it differs from last copy (12), data section is checked in memory to determine if differing section is already stored in current version in section memory of display (11). Computer (1) graphic data is copied into first computer memory (13). It is altered by user or computer program. Current/altered graphic data is continually compared section-wise with last copy (12) in memory (13). If current section differs from last copy (12), section is checked in memory to determine if differing section is already stored in current version in display section memory (11). If it is already stored in section memory, graphic data of the differing section is copied from section memory to the respective location on the screen (3). If it was not stored in section memory, graphic data of differing section is transferred from computer to display unit (2), displayed on screen and stored in section memory. If current section deviates from last copy (12) of this section in first computer memory (13), copy of section is updated in memory (13). Independent claims included for display unit, computer and system.
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