Matsushita Electric Industrial Co., Ltd.

Teiichi Yamagami

Tetsuro Ohtsuka

Mitsuharu Tsuchiya

A d.c. gas-discharge display device has gas-discharge display panel including hot cathodes inserted in a thermal electron generating space, an insulating plate having holes as discharge-glow spaces and on one surface thereof grid electrodes with holes for penetration of thermal electrons and on another surface thereof anode electrodes, and gas, metallic vapor on a mixture thereof, which fills the space in the display panel and forms an envelope. A voltage generator supplies the cathodes with a potential to provide thermal electrons. A first pulse generator supplies the grid electrodes with a pulse having a pulse height higher than V.sub.ON and being biased by a d.c. voltage lower than V.sub.OFF. A second pulse generator supplies the anode electrodes with a positive pulse having a pulse height higher than the ionization voltage of the gas, metallic vapor or mixture and being biased by a d.c. voltage between ground level and the ionization voltage. The discharge glow in each discharge hole is thus turned on during the time the pulse applied to the grid electrode coincides with the pulse applied to the anode electrode.

Growing community of inventors

Kawachinagano, Japan

Teiichi Yamagami