US 6,310,344 B1Granted

Wire type corona charger for electrophotographical manufacturing of CRTs

AssigneesOrion Electric Co., Ltd., Korea Institute of Science and Technology

InventorsDong Ky Shin, Hyo Sup Lee, Sang Youl Yoon, Sang Bong Kwon, Cheon Su Kang, Myung Hwan Oh, Kwang Duk Ahn, Tae Suk Park, Chong Hong Pyun, Byung Yong Yu

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Abstract

Disclosed is a wire-type corona charger having a wire electrode disposed between ground electrode plates. The wire electrode is supported by the ends of the plurality of wire electrode supporters which are so arranged that their ends have a curvature equal to arcuately-shaped upper edge of the ground electrode plates. The curvature coincides with one of the curvatures of the horizontal axis and the vertical axis of the interior surface of the panel faceplate, while the charger is pivoted along the other curvature of the faceplate. The charger can uniformly charge the photoconductive layer and improves the charging efficiency.

Claims26

Dependent claims

A wire-type corona charger for electrophotographically manufacturing a screen of a CRT, the wire-type corona charger being installed in a corona discharge apparatus and pivoted with a spacing over an entire interior surface of a panel faceplate of the screen along a first curvature which is one of curvatures of a horizontal axis and a vertical axis of the interior surface of the panel faceplate, so as to uniformly charge at least effective surface of a photoconductive layer with a desired voltage, the photoconductive layer being formed on an electro-conductive layer formed on the interior surface of the panel faceplate, the wire-type corona charger comprising:

a pair of ground electrode plates each of which has arcuately-shaped upper edge with a curvature substantially equal to a second curvature, the second curvature being a remaining one of the curvatures of the horizontal axis and the vertical axis of the interior surface of the panel faceplate, the pair of ground electrode plates being grounded with being arranged in parallel and spaced with regular intervals apart;
an insulating block disposed between the pair of the ground electrode plates and made from electrically insulating material, the insulating block having a plurality of wire electrode supporters so arranged that their upper ends are arranged to have a curvature substantially equal to the second curvature and lower than upper edges of the pair of ground electrode plates;
and
a wire electrode being supported by the upper ends of the plurality of wire electrode supporters, to which a high voltage is applied, so that at least effective screen of the photoconductive layer is charged uniformly.

1 more element

A wire-type corona charger for electrophotographically manufacturing a screen of a CRT, the wire-type corona charger being installed in a corona discharge apparatus and pivoted to a predetermined distance along a first curvature which is one of curvatures of a horizontal axis and a vertical axis of the interior surface of the panel faceplate, so as to uniformly charge at least effective surface of a photoconductive layer with a desired voltage, the photoconductive layer being formed on an electro-conductive layer formed on the interior surface of the panel faceplate, the wire-type corona charger being pivoted with a spacing from the photoconductive layer, the wire-type corona charger comprising:

at least three ground electrode plates, each of which has arcuately-shaped upper edge with a curvature substantially equal to a second curvature, the second curvature being a remaining one of the curvatures of the horizontal axis and the vertical axis of the interior surface of the panel faceplate at each section of the panel faceplate nearest to each of the ground electrodes, the pair of ground electrode plates being grounded with being arranged in parallel and spaced with regular intervals apart;
at least two sets of insulating blocks each of which is disposed respectively between the ground electrode plates and made from electrically insulating material, each of the insulating blocks having a plurality of wire electrode supporters so arranged that their upper ends are arranged to have a curvature substantially equal to the second curvature;
and
at least two wire electrodes being supported by the upper ends of the wire electrode supporters, to which a high voltage is applied, so that at least effective screen of the photoconductive layer is charged uniformly.

1 more element

Dependencies are inferred from the claim text.