Lg Electronics Inc.

Gyeong Sang Lee

Hyun Cheol Kim

Young Deog Koh

Sung Gi An

Huruya Koushi

Matsuo Tosihiro

Yagima Taeruo

Dawa Yashiro

Byoung Doo Ko

Method for fabricating a cathode in a cathode ray tube, the cathode having a cathode sleeve with a heat radiative coating layer formed on an inside wall thereof for emission of thermal electrons, the heat radiative coating layer being formed by a method including the steps of (a) coating a material of the heat radiative coating layer on a surface of a metal wire provided separately, (b) inserting the metal wire having the heat radiative coating layer coated thereon, to pass through an opening the cylindrical cathode sleeve, and (c) heating the metal wire by providing a power thereto, to deposit the material of the heat radiative coating layer coated on the metal wire on the inside wall of the cathode sleeve, whereby permitting to coat many number of cathode sleeves at a time, and to form a film of uniform composition and even thickness to enhance electron emission.

Method for fabricating cathode in color cathode ray tube

Cathode in an electron tube, is disclosed, including an actinoid metal or actinoid metal compound added to either a thermion emission material layer or a base metal, or formed between the thermion emission material layer and the base metal, whereby improving an electron emission characteristic of the cathode, significantly.

Cathode in electron tube with actinoid metal(s) or compound(s) thereof

A focusing electrode in an electron gun for a color cathode ray tube or high definition industrial picture tube includes a first and second focusing electrodes. A recess portion in one end of the first focusing electrode is oriented to face burring parts of the second focusing electrode. An electron beam and a surrounding portion pass through holes in the first focusing electrode to reduce the space between the first and second focusing electrodes. This improves the static convergence drift.

Focusing electrode structure

Growing community of inventors

Kyongsangbuk-do, South Korea

Gyeong Sang Lee