发明名称 |
Colour picture tube apparatus. |
摘要 |
<p>A colour picture tube apparatus comprises a colour picture tube (11) including an envelope (15) having a phosphor screen (16) excited by a plurality of electron beams (18R, 18G, 18B), and deflection means (30) generating horizontal deflection field and barrel type vertical deflection field for the beams, including non-linear magnetic field correction means (40) generating an additional pin-cushion type magnetic field in the vertical field to have preferable convergence characteristics such that vertical direction coma errors can be appropriately corrected throughout every portion of the vertical axis on the screen, whereby high-definition colour images can be obtained thereon.</p> |
申请公布号 |
EP0266181(A2) |
申请公布日期 |
1988.05.04 |
申请号 |
EP19870309503 |
申请日期 |
1987.10.28 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
KOBAYASHI, KENICHI C/O PATENT DIVISION;KOBA, HIROYUKI C/O PATENT DIVISION;NAKAMURA, NAOTO C/O PATENT DIVISION |
分类号 |
H01J29/76;H01J29/56;H01J29/70;H04N9/28 |
主分类号 |
H01J29/76 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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