公开(公告)号：US5041767A

公开(公告)日：1991-08-20

申请号：US501735

申请日：1990-03-30

申请人： Mihail Doroftei ,  Pat Arotta ,  Brian D. Green ,  Rastislav N. Royko ,  Brent M. Serbin

发明人： Mihail Doroftei ,  Pat Arotta ,  Brian D. Green ,  Rastislav N. Royko ,  Brent M. Serbin

IPC分类号： H05B41/392 ,  H05B41/30 ,  H05B41/36 ,  H05B41/42 ,  H05B41/44

CPC分类号： H05B41/44 ,  H05B41/30 ,  H05B41/36 ,  H05B41/42 ,  Y10S315/07

摘要： A gas discharge tube is controlled in intensity and in the length along such tube that is illuminated by providing digital control signals to an analog drive circuit connected to the high-voltage energization device for the tube. A pulse-width modulated digital control signal containing illumination length and intensity information is converted to ramp-shaped analog drive pulse that control the voltage at a high-voltage transformer secondary to which the gas discharge tube is connected. A manually actuatable keypad permits the user to enter the information that is then converted to the pulse-width modulated signal.