EP 0014127 B1 19830316 - CURVE GENERATOR FOR MAKING VISIBLE SYMBOLS ON A CATHODE RAY TUBE SCREEN
Title (en)
CURVE GENERATOR FOR MAKING VISIBLE SYMBOLS ON A CATHODE RAY TUBE SCREEN
Publication
Application
Priority
FR 7902281 A 19790130
Abstract (en)
[origin: US4314351A] The curve-generating device serves in particular to produce signals relating to a circular line from simple algorithms. The device comprises means for computing a parameter DELTA L defined by <IMAGE> where U is an elementary vector, theta is the angle at the center of a polygon of side U+ DELTA L circumscribed about the circle R, and processing logic circuits for determining the polar direction Pn of the plotted line according to the relation: <IMAGE> where DELTA n-1=1 in respect of xn-1>/=U and xn=xn-1+ DELTA Lx DELTA n-1-Ux DELTA n-1.
IPC 1-7
IPC 8 full level
G09G 1/10 (2006.01)
CPC (source: EP US)
G09G 1/10 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE GB IT NL SE
DOCDB simple family (publication)
EP 0014127 A1 19800806; EP 0014127 B1 19830316; DE 3062305 D1 19830421; FR 2448194 A1 19800829; FR 2448194 B1 19811030; US 4314351 A 19820202
DOCDB simple family (application)
EP 80400057 A 19800115; DE 3062305 T 19800115; FR 7902281 A 19790130; US 11588580 A 19800128