Title:
DRIVING METHOD FOR FIELD EMISSION TYPE COLD CATHODE ELEMENT AND DISPLAY DEVICE USING SAME
Document Type and Number:
Japanese Patent JP3296427
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a driving method for a field emission type cold cathode element capable of disusing or reducing horizontal deflection magnetic field distribution and vertical deflection magnetic field distribution and suppressing distortion of a beam shape by a magnetic field distribution and enlargement of a radius of a beam spot of a screen.
SOLUTION: This field emission type cold cathode element 3 is formed by arranging field emission type cold cathodes 1 in a three-line shape. A control electrode 2 is arranged to the cold cathode. When an electron beam is converged by an electron lens, deflected by a magnetic field, and irradiated on a screen, the control electrodes A1, B1:A2, B2:A3, and B3 are controlled so that focusing positions of a plurality of beams are apart from each other by reducing a potential difference between a deflection side and an anti-deflection side right above the one cold cathode as compared with a potential difference between a deflection side and an anti-deflection side right above the other cold cathode positioned on the anti-deflection side from the one cold cathode.
Inventors:
Akihiko Okamoto
Kazuo Onuma
Kazuo Onuma
Application Number:
JP13199799A
Publication Date:
July 02, 2002
Filing Date:
May 12, 1999
Export Citation:
Assignee:
NEC
International Classes:
H01J29/04; G09G1/04; G09G3/22; H01J3/02; H01J29/48; H01J29/51; H01J29/56; H01J29/62; (IPC1-7): H01J29/04; H01J29/51; H01J29/62
Domestic Patent References:
| JP9115426A | ||||
| JP6215686A | ||||
| JP7147129A |
Attorney, Agent or Firm:
Johei Yamashita
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