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Combination of Alphanumeric And Formatting Data on CRT Display

IP.com Disclosure Number: IPCOM000078267D
Original Publication Date: 1972-Dec-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Webb, GT: AUTHOR

Abstract

A plurality of alphanumeric characters from lines 1 - 4 of text, Fig. 1, are displayed on one portion of a cathode-ray tube (CRT) screen 5, Fig. 2, while on another portion of screen 5, lines 10 - 13 of single dots are displayed representative of all of the alphanumeric characters on the Page of text for formatting purposes. The dots corresponding to the alphanumeric characters presently being displayed are intensified, to indicate to the viewer the relationship of the characters displayed to the entire page of text.

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Combination of Alphanumeric And Formatting Data on CRT Display

A plurality of alphanumeric characters from lines 1 - 4 of text, Fig. 1, are displayed on one portion of a cathode-ray tube (CRT) screen 5, Fig. 2, while on another portion of screen 5, lines 10 - 13 of single dots are displayed representative of all of the alphanumeric characters on the Page of text for formatting purposes. The dots corresponding to the alphanumeric characters presently being displayed are intensified, to indicate to the viewer the relationship of the characters displayed to the entire page of text.

In Fig. 1, alphanumeric characters on lines 1 - 4 are shown. Screen 5 in Fig. 2 is large enough only to display the characters shown in window 6. Typically, a 5X7 dot matrix is used to display each character so that the width of a character is 5 dots. Although the viewer of screen 5 is able to view a plurality of characters not exceeding the area of window 6, the dots on lines 10 - 13 provide a representation of the format of all characters in the text, since a single dot is only one fifth of the width of a character. Format dots representative of many more lines of text in addition to lines 1 - 4 may be displayed, since a single dot is only one seventh of the height of a character.

Controls 20 and 21 allow the operator to effectively move window 6 up, down, right, and left, respectively, to display any portion of the text on screen 5. Control circuitry, not shown, for generating the dots...