G - Physics – 11 – B
Patent
G - Physics
11
B
354/229
G11B 5/012 (2006.01) B41B 19/01 (2006.01) B41B 27/00 (2006.01) G09G 1/14 (2006.01)
Patent
CA 1130925
ULTRAHIGH RESOLUTION PHOTOCOMPOSITION SYSTEM EMPLOYING ELECTRONIC CHARACTER GENERATION FROM MAGNETICALLY STORED DATA ABSTRACT OF THE INVENTION A photocomposition system for composing type- face characters on a CRT display using a magnetic font disc formed of plural variable length character sectors wherein each sector includes successive storage cells containing all of the coded signals necessary to des- cribe a single character image which signals may be retrieved and decoded for use by the CRT to create an optical image of the character. An optical scanner system is disclosed for optically determining the coordi- nate points on the boundary of an original character design for subsequent encoding into successive 3 bit binary codes representing successive end to end transla- tional movements along the boundaries of the character design being encoded. The translational movements are selected from a subset of a total of 24 possible translational paths wherein the paths making up the subset is continually varying dependent on the general direction of the previous translational path. An elec- tronic printer system is disclosed for retrieving a single groups of character identifying translational command codes in response to text composing signals produced on a text editor. Each group of translational command codes is temporarily stored for decoding into coordi- nate signals used to access a high speed output memory having storage cells corresponding to the coordinates of the elemental areas (dots) on the CRT screen con- ceptually divided into an elemental area (dot) matrix. Following one complete decoding cycle, the data stored in the high speed output memory is used to cause the CRT to create an image of the character.
335574
Tidd James A.
Tidd Miles H.
Alphatype Corporation
Macrae & Co.
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