Title:
CATHODE-RAY TUBE
Document Type and Number:
Japanese Patent JP3246072
Kind Code:
B2
Abstract:
PURPOSE: To shield a leakage electric field in a specific frequency band by covering a part of a funnel made of glass.
CONSTITUTION: To the glass funnel 2 of a color display tube 1, a funnel-shaped resin compact 4 a carbon type conductive layer 3 is coated to the inner surface is installed. The compact 4 is fixed to the funnel 2 with a conductive silicon type adhesive seal member 6. The conductive layer 3 is formed on the outer surface of the funnel 2, and a part is earthed through an extended outer duck 5 and the seal member 6 provided to be attached to the duck 5. As the compact 4, a flame resistant polycarbonate resin which can secure the insulation between the surface of a horizontal deflection coil 7 about 1000 Vp of pulse voltage is applied, and the layer 3 is used. By such a way, a a leakage electric field with the frequency band more than 2 kHz and less than 400 kHz from the cathode-ray tube can be shielded effectively.
Inventors:
Masanobu Honda
Nozomi Arimoto
Saburo Aihara
Masamitsu Kudo
Hideo Yamazaki
Nozomi Arimoto
Saburo Aihara
Masamitsu Kudo
Hideo Yamazaki
Application Number:
JP11036593A
Publication Date:
January 15, 2002
Filing Date:
May 12, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01J29/88; H04N5/64; (IPC1-7): H01J29/88
Domestic Patent References:
| JP574374A | ||||
| JP554834A | ||||
| JP57138257U |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)