Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Reexamination Certificate
2006-11-14
2006-11-14
Williams, Joseph (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
C313S449000, C313S409000, C315S015000, C315S382000
Reexamination Certificate
active
07135813
ABSTRACT:
A main lens is formed by a focus electrode, an intermediate electrode, and an anode electrode successively arranged in a traveling direction of an electron beam. The focus electrode and the anode electrode respectively have an electron beam passage aperture common to three electron beams, having a major axis in a horizontal direction in a portion opposed to the intermediate electrode, and three electron beam passage apertures through which the three electron beams pass are formed respectively in the focus electrode and the anode electrode. Aperture dimensions in a vertical direction of the electron beam passage apertures common to the three electron beams formed respectively in the focus electrode and the anode electrode are smaller than those in the vertical direction of the electron beam passage apertures formed in portions of the intermediate electrode respectively opposed to the focus electrode and the anode electrode. This can provide a color Braun tube apparatus that has less moire while having satisfactory focus performance over the entire surface of a phosphor screen, and in which there are no increase in the cost of a driving circuit and the decrease in withstand voltage characteristics.
REFERENCES:
patent: 5675211 (1997-10-01), Ueda
patent: 6339293 (2002-01-01), Kimiya et al.
patent: 6586868 (2003-07-01), Takekawa et al.
patent: 2002/0185957 (2002-12-01), Uchida et al.
patent: 1108429 (1995-09-01), None
patent: 1280378 (2001-01-01), None
patent: 0 646 944 (1994-09-01), None
patent: 8-22780 (1996-01-01), None
patent: 9-180648 (1997-07-01), None
Takekawa Tsutomu
Ueno Hirofumi
Hamre Schumann Mueller & Larson P.C.
Matsushita Toshiba Picture Display Co., Ltd.
Sanei Hana A.
Williams Joseph
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