公开(公告)号：US3555520A

公开(公告)日：1971-01-12

申请号：US3555520D

申请日：1969-04-30

Applicant: RCA CORP

Inventor： HELBIG WALTER ALLEN ,  ROSS WALTER LEE

IPC: G06F3/153 ,  G09G5/22 ,  G06F3/14 ,  G06F13/02

CPC classification number: G06F3/153 ,  G09G5/222

Abstract: A PLURALITY OF MEMORIES, EACH STORING CHARACTER CODES FOR ONE OR MORE TELEVISION TYPE DISPLAYS AND A PLURALITY OF CHARACTER GENERATORS, EACH FOR PRODUCING THE VIDEO SIGNALS FOR ONE TELEVISION HORIZONTAL SCAN LINE. (A PLURALITY OF ADJACENT SCAN LINES FORM ONE ROW ON A DISPLAY.) THE CHARACTER CODES ARE EXTRACTED FROM THE MEMORIES A GROUP AT A TIME IN INTERLACED FASHION. EACH GROUP OF CODES CORRESPONDS TO ONE ROW OF CHARACTERS TO BE WRITTEN ON ONE DISPLAY. EACH GROUP OF CODES IS APPLIED TO THE CHARACTER GENERATORS IN SUCCESSION AND EACH CHARACTER GENERATOR, DURING SUCCESSIVE HORIZONTAL SCAN LINE INTERVALS, APPLIES SUCCESSIVE GROUPS OF VIDEO SIGNALS, EACH GROUP INDICATIVE OF THE SAME LINE ON A DIFFERENT DISPLAY, TO THE DIFFERENT DISPLAYS.