US 4,227,117 AGranted

Picture display device

AssigneeMatsuhita Electric Industrial Co., Ltd.

InventorsMasanori Watanabe, Kinzo Nonomura, Yoshinobu Takesako

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Abstract

A picture display device comprising an electron source for producing band-shaped electron beams, electron beam control means for controlling the selective passage of the electron beams, deflection means for horizontally and vertically deflecting the electron beams and display means for emitting light in response to impingement of the electron beams thereon. The electron source comprises a plurality of linear thermionic cathodes, a focusing electrode for focusing the electron beams emitted from each linear thermionic cathode to band-shaped electron beams and an electron beam emitting electrode having a plurality of apertures therethrough, and a negative pulse voltage is sequentially applied to the linear thermionic cathodes to emit the required electron beams for one scanning line.

Claims12

Dependent claims

A picture display device comprising:

a plurality of linear thermionic cathodes;
partition means for separating said linear thermionic cathodes from one another;
electron beam extraction electrode means having a plurality of apertures formed therethrough in correspondence with said thermionic cathodes in the axial direction thereof for producing electron beams;
electron beam control electrode means comprising a plurality of electrodes including a plurality of apertures each thereof being coaxial with corresponding one of said apertures formed in said electron beam extraction electrode means, said control electrodes being arranged substantially perpendicular to said thermionic cathodes;
deflection electrode means for deflecting said electron beams;
acceleration electrode means for accelerating said electron beams;
and
display means coated with a fluorescent substance which emits light when hit by said electron beams and including a display screen, at least said display screen being housed in a transparent glass container.

5 more elements

Dependencies are inferred from the claim text.