Electronic typographical display device with justification featu

Details Electronic typographical display device with justification featu Electronic typographical display device with justification featu

1979-11-15

1982-09-07

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 500, G06F 502

Patent

active

043487386

ABSTRACT:
An electronic typographic apparatus includes a multiline display, the top of the display being justified and the lower line constituting a data entry line. Coded typographic data is stored in a character memory, the dot format for the display of characters in different scan lines being produced upon application of stored character data to character generating read only memories. The data entry position of the data entry line of the display is stored and new data is entered into the character memory with counting circuits being employed to keep track of the data entry line and position. The display is "rolled up" one line upon receipt of a carriage return signal, and in the backspacing function, stored data is deleted. Backspacing may proceed into a line previously rolled up, in which case all of the lines are rolled down. The characters are displayed with proportional widths, as a function of a Character Clock signal generated from a read only memory instantaneously responsive to coded signals of the character memory just prior to the display of elements of a character. Word spaces of the top line of the display are counted to develop justification data for justifying the top display line, the justification data being stored in a separate memory and "stretching" the word spaces of the top display line by inhibiting the character clock, while the display scan continues, for the determined periods. Once justification is complete, the aforementioned determined periods are digitized and directed to the hard copy printing device to define the amount of "stretching" required. Tab stops are stored in a separate memory, and a circuit responsive to a tab signal stored in the character memory also inhibits continuation of the character clock signal until a tab stop signal is received from the tab stop memory. A special timing circuit determines when a key has been depressed for more than the normal amount of time, and then activates a gating circuit to initiate repetitive key operation.

REFERENCES:
patent: 3340012 (1970-11-01), Ehrman
patent: 3654611 (1972-04-01), Bluethman et al.
patent: 3675208 (1972-07-01), Bard
patent: 3786429 (1974-01-01), Goldman et al.
Encyclopedia of Electronic Circuits, by Leo Sands and Donald Mackenroth, pp. 264-265, Parker Publishing Co., West Nyack, New York, 1975.

Affiliated with

Also associated with

Rating

Electronic typographical display device with justification featu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic typographical display device with justification featu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic typographical display device with justification featu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1345557