Projection tube having different neck diameters

Details Projection tube having different neck diameters Projection tube having different neck diameters

2005-01-25

2005-01-25

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Envelope

C313S426000, C313S450000

Reexamination Certificate

active

06847159

ABSTRACT:
The present invention aims at maintaining the high focusing performance with a low deflection power in a projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a single-electron-beam high current. A neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than a neck outer diameter of a portion which accommodates an electron gun. A final electrode of the electron gun has a diameter thereof gradually decreased toward a phosphor screen. The maximum anode voltage of the projection tube is set to equal to or more than 25 KV and the maximum beam current is set to equal to or more than 4 mA.

REFERENCES:
patent: 2250622 (1941-07-01), Bowie
patent: 3163794 (1964-12-01), Bloomsburgh et al.
patent: 3840773 (1974-10-01), Hart
patent: 4143298 (1979-03-01), Bing et al.
patent: 5777430 (1998-07-01), Ueda et al.
patent: 5909079 (1999-06-01), Uchida et al.
patent: 5994830 (1999-11-01), Nose et al.
patent: 6031326 (2000-02-01), Suzuki et al.
patent: 6133685 (2000-10-01), Konda et al.
patent: 6271625 (2001-08-01), Van Engelshoven et al.
patent: 6404119 (2002-06-01), Hidaka et al.
patent: 6441547 (2002-08-01), Van Alphen et al.
patent: 20020180335 (2002-12-01), Saitou et al.
patent: 0 250 027 (1997-12-01), None
patent: 58100344 (1983-06-01), None
patent: 03-192636 (1991-08-01), None
patent: 11135037 (1999-05-01), None
patent: 11-185660 (1999-07-01), None
J. Kilton; 52.4 : A 16-cm Large Neck Projection CRT for HDTV; SID 1999 Digest p. 1084-1087.

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