Title: Color picture tube apparatus
Application Number: 200410055764 Application Date: 2004.07.30
Publication Number: 1581415 Publication Date: 2005.02.16
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01J29/56,H01J29/76,H01J31/20
Applicant(s) Name: Matsushita Toshiba Picture Dis Address:
Inventor(s) Name: Iwasaki Katsuyo
Attorney & Agent: xia jing
Abstract:
     On an outer circumferential surface of a neck portion (3 a) of a funnel (3), a CPU (9) having a pair of quadrupole magnets (93) and a pair of bar -shaped magnets (8) each having magnetic poles on both sides in a major axis direction are provided. The pair of bar-shaped magnets (8) sandwich the neck portion (3a) substantially in an in-line direction of an in-line type electron gun (4), and are provided so that identical poles are opposed to each other, between an end plate (63b) of an insulating frame (63) of a deflection yoke (6) and the CPU (9) at a distance from the end plate (63b). In the case where a rotational shift of electron beams is caused, electron beams (R) and (B) are corrected so as to move upward and downward (or downward and upward) respectively by a quadrupole magnetic field generated by the quadrupole magnets (93). Then, the electron beams (R) and (B) are corrected so as to move downward and upward (or upward and downward) respectively by the quadrupole magnetic field generated by the pair of bar-shaped magnets (8). Thus, a misconvergence due to the rotational shift of the electron beams can be corrected.
Time: 6
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