Browse Prior Art Database

Segmented Display

IP.com Disclosure Number: IPCOM000075615D
Original Publication Date: 1971-Oct-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Lindsey, RD: AUTHOR

Abstract

For text revision purposes, a display may be used with a keyboard having access to an electronic store.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 66% of the total text.

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Segmented Display

For text revision purposes, a display may be used with a keyboard having access to an electronic store.

Ideally, a display of textual information should show the text as it would appear on paper; that is, full lines should be displayed horizontally with proper position relationship between characters on successive lines. To display a full line of text horizontally requires a large CRT, however, with an implied high cost and large physical size of the display package. Illustrated is a method of displaying text in a meaningful way to the operator, so that a comparison of the display with a marked-up hard copy to locate revision points can be made quickly, but using a CRT with a display line length of 40-70 characters.

Assume that the video buffer is a recirculating shift register with addressing accomplished by the use of a "flag" code, which defines the location at which keyed characters will be entered or from which characters may be printed. The display screen should show text in the vicinity of this flag. The display may be designed such that the operator may view the text stored in the buffer, with the operating point, or flag, located on the center line of the screen, and an additional line displayed above and below the flag line for reference purposes.

The flag point will be indicated by a cursor under the character to be operated upon. The cursor will always be on the center line in the display. When the flag is at the beginning of a line...