Futaba Corporation

Junichiro Kogure

Masahiro Kato

Toshinori Suzuki

Tadashi Mizohata

Yuji Nomura

Yoshinari Okamoto

Yusuke Yasuoka

Hiroyuki Wada

Kazuhiko Itakura

Akio Namiki

Mitsuyoshi Nihei

A sealing material for sealing an envelope of an electron tube. The sealing material comprises 0.01&#x2dc;2.0 wt % of fine particle selected from the group consisting of SiO, AlOand ZrOhaving a particle diameter of 0.001&#x2dc;0.1 &#x3bc;m, PO&#x2014;SnO type low melting glass and thermal expansion-controlling low melting ceramics.

Sealing material

A fluorescent display device having a pseudo half mirror formed on a rear surface a face plate thereof and exhibiting a function like a neutral density filter. The face plate is formed on a whole rear surface thereof with an aluminum film including opening portions, non-opening portions and a solid portion. The opening and non-opening portions cooperate with each other to constitute a pseudo half mirror. The pseudo half mirror has light transmittance determined depending on a ratio in area between the opening portions and the non-opening portions. Thus, the light transmittance may be set as desired by varying the area ratio.

Fluorescent display device

A fluorescent display device cable of being significantly increased in emission. A grid electrode is formed of a nonleaded conductive paste constituted by Al containing at least one of organic metal and phosphate glass frit by screen printing. This positively prevents precipitation of Pb on the grid electrode due to reduction of PbO by oxidation of Al during calcination of the conductive paste as encountered with the prior art.

Fluorescent display device with conductive layer comprising aluminum paste

Growing community of inventors

Mobara, Japan

Junichiro Kogure