发明名称 |
Wide-angle deflection color cathode ray tube with a reduced dynamic focus voltage |
摘要 |
A three in-line beam type color CRT includes a focus electrode and an anode. The focus electrode includes a first focus sub-electrode supplied with a first fixed focus voltage and a second focus sub-electrode supplied with a second fixed voltage superposed with a dynamic voltage synchronized with beam deflection, and the first and second focus sub-electrodes form a quadrupole lens therebetween. Two side electron beams are deflected toward a center electron beam with increasing dynamic voltage in the quadrupole lens. An axial distance Lgf (mm) from a cathode side end of the first focus sub-electrode to an anode side end of the second focus sub-electrode, an axial distance Ls (mm) from the end of the second focus sub-electrode to the phosphor screen, and a useful diagonal dimension D (mm) of the phosphor screen satisfy 0.06xLs (mm) <=Lgf (mm)<=26 (mm) and 1.50<=D/Ls<=1.70.
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申请公布号 |
US2002008457(A1) |
申请公布日期 |
2002.01.24 |
申请号 |
US20010923372 |
申请日期 |
2001.08.08 |
申请人 |
NAKAMURA TOMOKI;SHIRAI SHOJI;YATSU YASUHARU |
发明人 |
NAKAMURA TOMOKI;SHIRAI SHOJI;YATSU YASUHARU |
分类号 |
H01J29/50;(IPC1-7):H01J29/50 |
主分类号 |
H01J29/50 |
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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