Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Reexamination Certificate
2005-11-15
2005-11-15
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
C313S409000, C313S441000
Reexamination Certificate
active
06965192
ABSTRACT:
A color picture tube apparatus having an inline electron gun that allows technology for applying a dynamic voltage to an OLF lens to be implemented, while avoiding design difficulties. Eave-shaped electrode plates are attached, parallel with each other in a horizontal scan direction, to a field-correction electrode plate, which is a horizontally long, flatten plate in which three holes are provided, and whose shape is similar to that of an aperture in a circumferential electrode. This structure allows quadrupole lenses to be formed as auxiliary lenses having strong focusing action horizontally and divergent action vertically, and thus an HV differential can be increased. As a result, it is possible to reduce the dynamic voltage without any of the design difficulties accompanying the prior art, in which eave-shaped electrode plates are not provided.
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Sukeno Masahiko
Ueda Yasuyuki
Matsushita Electric - Industrial Co., Ltd.
Santiago Mariceli
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