Patent
1990-03-01
1993-02-23
Harkcom, Gary V.
395151, G06F 1562
Patent
active
051897300
ABSTRACT:
An apparatus for generating character pattern signals in response to a character code and an attribute signal, in which the character has an outline which may be divided into a plurality of regions in which each region is defined by an initial point, a terminal point and a control point includes an outline storage circuit for converting the control point into an auxiliary point having coordinates on a curve of the character and for storing the initial point, terminal point and auxiliary point as data. An outline reproducing circuit converts the data into scaled down data, standard sized data or enlarged data in response to the attribute signal and produces a conic line based upon the converted data. A selecting circuit, in response to an attribute signal indicating that the scaled down data is to be output computes a linear function producing a first line segment for connecting the initial point to the auxiliary point, a second line segment for connecting the terminal point to the auxiliary point, a third line segment for connecting the terminal point to the initial point as well as computing a maximum gap between the reduced sized outline and the line segments and outputting the output of the outline reproducing circuit when the maximum gap is greater than a reference value and the linear function as the outline when the maximum gap is smaller than a reference value. The output of the outline reproducing circuit is selected at all other times.
REFERENCES:
patent: 4674058 (1987-06-01), Lindbloom et al.
patent: 4686633 (1987-08-01), Schrieber
Harkcom Gary V.
Seiko Epson Corporation
Zimmerman Mark K.
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