Invention Grant
- Patent Title: Projection tube having different neck diameters
- Patent Title (中): 具有不同颈径的投影管
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Application No.: US10636795Application Date: 2003-08-07
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Publication No.: US07075221B2Publication Date: 2006-07-11
- Inventor: Kouichi Saitou , Kazumasa Hirai , Tetsuo Asano , Kotaro Aoki , Yasuo Tanaka
- Applicant: Kouichi Saitou , Kazumasa Hirai , Tetsuo Asano , Kotaro Aoki , Yasuo Tanaka
- Applicant Address: JP Chiba-ken JP Chiba-ken
- Assignee: Hitachi, Ltd.,Hitachi Electronic Devices, Ltd. Co.
- Current Assignee: Hitachi, Ltd.,Hitachi Electronic Devices, Ltd. Co.
- Current Assignee Address: JP Chiba-ken JP Chiba-ken
- Agency: Milbank, Tweed, Hadley & McCloy LLP
- Priority: JP2001-159789 20010529
- Main IPC: H01J29/86
- IPC: H01J29/86 ; H01J29/70
Abstract:
The present invention aims at maintaining the high focusing performance at a low deflection power in a single-beam projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a high current. The neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than the neck outer diameter of a portion which accommodates an electron gun. 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
Public/Granted literature
- US20040027043A1 Projection tube having different neck diameters Public/Granted day:2004-02-12
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