| 摘要 |
PURPOSE:To make lower the voltage of drive power supply and to decrease the dielectric strength of the anode switch circuit, by providing the pull up time between the charging time and the cathode selection time and performing the initial start auxiliary operation. CONSTITUTION:The anode switch 7-1 and the cathode switch 8 are turned on at the selection time TK' of the reset cathode 3' to cause sure reset discharge. Next, at the charging time TCHG2, all the cathodes 8-1 and 8-2 are kept OFF, and the start auxiliary switch 12 is connected to ground, to charge up the stray capacity 10-1 and the start auxiliary capacity 11-1 from the power supply Es. When the pull-up time Tp2 is reached, the anode switch 7-1 is turned off and the anode potential VA increases from VS to VP with the turning on of the start auxiliary switch 12. when the switch 7-1 is turned on at the cathode selection time Tk2, the ignition current flows and simultaneously, the display discharge current flows constantly during Tk2 from the power supply Es through the resistor 9-1 to perform display discharge. |
