Fluorescent display device
AssigneesFutaba Denshi Kogyo K.K., Hitachi Metals, Ltd.
InventorsTadashi Mizohata, Daiji Sakamoto
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Abstract
A fluorescent display device capable of preventing variation or flickering of luminescence due to deformation of a mesh section. The fluorescent display device includes mesh-like control electrodes each being made of a material of which the coefficient of average thermal expansion is smaller than that of the glass substrate or a spacer frame at a temperature within the range of from 30.degree. C. to 250.degree. C. and is substantially equal to or larger than that of the glass substrate or the spacer frame at a temperature within a range from 30.degree. C. to the sealing temperature of the fluorescent display device.
Claims9
A fluorescent display device comprising:
- a glass substrate;
- phosphor-deposited anodes provided on said glass substrate;
- control electrodes provided above said anodes;
- filamentary cathodes stretchedly arranged above said control electrodes;
- and
- an envelope kept at a high vacuum to accommodate said anodes, control electrodes and filamentary cathodes;
- said control electrodes being made of an alloy of which the coefficient of average thermal expansion is smaller than that of said glass substrate and that of 426 alloy at a temperature within the range of from 30.degree. C. to 250.degree. C. and is substantially equal to or larger than that of said glass substrate and that of 426 alloy at a temperature within the range of from 30.degree. C. to the sealing temperature of the fluorescent display device.
Dependencies are inferred from the claim text.