# US 4,400,697 A · Method of line buffer loading for a symbol generator

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- Number: US 4,400,697 A
- Document ID: US4400697A
- Status: Granted
- Kind: A
- Application number: 06/275,277
- Filed: 1981-06-19
- Granted: 1983-08-23
- Earliest claimed: 1981-06-19
- Assignees: Chyron Corporation
- Inventors: Glenn E. Currie; Erika Fremed
- Web page: https://patentgrep.com/patent/US4400697A

## CPC

- G09G 5/246: {of ideographic or arabic-like characters}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

In a symbol-display system which includes a keyboard for entering codes related to the symbols to be displayed and a memory for storing the codes associated with a line of symbols to be displayed, the symbols being from a font which includes at least one character represented by a set of symbols wherein the actual symbol to be used of the set is determined by the presence or absence on the displayed line of a space symbol immediately adjacent the character, there is disclosed the method of loading the codes in the memory for the display of a line of symbols by providing the keyboard with a key for each character that may be displayed as one of the symbols of the associated set wherein each of the keys represents a base symbol of the set, generating when one of the keys is depressed a base coded-combination of bits and modifying the base coded-combination of bits by changing at least one of the two least significant bits when any immediately adjacent key generated character is a space symbol.

## Claims

### Claim 1

In a symbol-display system which includes a keyboard for entering indicia related to the symbols to be displayed and a memory for storing the indicia associated with a line of symbols to be displayed, the symbols being from a font which includes at least one character represented by a set of symbols wherein the actual symbol to be used of the set is determined by the presence or absence on the displayed line of a space symbol immediately adjacent the character, the method of loading said indicia in the memory for the display of at least a line of symbols comprising the steps of providing the keyboard with at least a key for each character that may be displayed as one of the symbols of the associated set, each of said keys representing a base symbol of the set, generating when one of said keys is depressed a base coded-combination of bits, modifying said base coded-combination of bits by changing at least one of the bits in two specific bit positions of said base coded-combination of bits when any immediately adjacent key generated character is a space symbol.

### Claim 2 (depends on 1)

The method of claim 1 wherein said base coded combination of bits are zero bits and said modifying is accomplished by adding binary 1 and or 2 to said base combination of bits.