EP0185294A2
Expired / Lapsed
EP
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Display apparatus
Assignee: International Business Machines Corp
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Filing: 1985-12-10
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Granted: —
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Expires: 2005-12-10
Abstract
Abstract A refresh buffer (2) of a display system stores data to be displayed and phantom attribute bytes which are copies of field attribute bytes. A plurality of phantom attributes bytes each of which controls display condition of corresponding row data are collectively stored in one area (26) of the refresh buffer as a table which is separated from a data area (22) of the refresh buffer. If a display screen is partitioned into left and right viewport, two phantom attribute byte tables are established. Searching, deleting and inserting of data can be performed continuously. So, data handling efficiency is very high.
Inventors
- 👤 Katsuyuki Nojima
- 👤 Banri Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 18:36
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/22; G09G5/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
A display apparatus having a refresh memory (2) to store attribute copy signals (EA) which are copies of field attribute signals (FA) defining the display condition of data (22) to be displayed together with said data to be displayed, comprising: an attribute copy table (26) which stores a plurality of attribute copy signals (EA) collectively in a plurality of sequentially accessible locations in said refresh memory; and a means (4,6,8) to address said table for reading said attribute copy signal corresponding to data to be displayed out of said table before reading the data to be displayed out of said refresh memory.
Claim 2
Dependent Claim
102 words
A display apparatus having a refresh memory (2) to store attribute copy signals (EA) which are copies of field attribute signals (FA) defining the display condition of data (22) to be displayed together with said data to be displayed, comprising: an attribute copy table (26) which stores a plurality of attribute copy signals (EA) collectively in a plurality of sequentially accessible locations in said refresh memory; and a means (4,6,8) to address said table for reading said attribute copy signal corresponding to data to be displayed out of said table before reading the data to be displayed out of said refresh memory.
Claim 3
Dependent Claim
26 words
Display apparatus according to claim 1, wherein for each view port provided for display on said display apparatus a separate attribute copy table (26) is establishable.
References Cited (Backward Citations)
No citation records indexed.
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