Shadow mask for cathode ray tube

专利名称：Shadow mask for cathode ray tube发明人：Soon-Dong Jeong,Do-Hun Pyun,Chang-Mog

Jo,Jae-Kwang Ryu

申请号：US113033申请日：20060327

公开号：US20060226755A1公开日：20061012

专利附图：

摘要：A shadow mask for a cathode ray tube has an effective screen portion having aplurality of beam passage holes arranged in a predetermined pattern, and an inactiveportion with no beam passage holes. The length of a beam passage hole at a column

adjacent to a division between the effective screen portion and the inactive portion in thelong-sided direction is set to be smaller than the length of a beam passage hole placedat the short-sided center of the column. The length a of the beam passage hole adjacentto the division between the effective screen portion and the inactive portion at columnswhich are even-numbered from the long-sided center of the effective screen portion isestablished to satisfy the condition of 1>a/A≧0.45, compared to the length A of thebeam passage hole placed at the short-sided center of relevant columns. The length b ofthe beam passage hole adjacent to the division between the effective screen portion andthe inactive portion at columns which are odd-numbered from the long-sided center ofthe effective screen portion is established to satisfy the condition of 1>b/B≧0.35,compared to the length B of the beam passage hole placed at the short-sided center ofrelevant columns.

申请人：Soon-Dong Jeong,Do-Hun Pyun,Chang-Mog Jo,Jae-Kwang Ryu

地址：Suwon-si KR,Suwon-si KR,Suwon-si KR,Suwon-si KR

国籍：KR,KR,KR,KR

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