CATHODE RAY TUBE - MATSUSHITA ELECTRIC IND CO LTD

Title:

CATHODE RAY TUBE

Document Type and Number:

WIPO Patent Application WO/2002/029847

Kind Code:

A1

Abstract:

A cathode ray tube wherein the flatness of a tension mask constituting a color selection mechanism is maintained under a proper tension, and wherein the deviation of electron beams is reduced by suppressing influences of external magnetic fields of geomagnetism etc. with a tension mask. A tension mask consisting of a magnetic material is used and tensioned under a tension of a range where the flatness is maintained. The direction and intensity of the tension are set so that the vertical permeability of the tension mask may increase under a magnetoelastic effect induced by the magnetic material of the tension mask.

Inventors:

HATTA SHIN-ICHIRO (JP)
MURAI RYUICHI (JP)
IWAMOTO HIROSHI (JP)
NAKATERA SHIGEO (JP)
OZAWA TETSURO (JP)

Application Number:

PCT/JP2001/006892

Publication Date:

April 11, 2002

Filing Date:

August 10, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
HATTA SHIN ICHIRO (JP)
MURAI RYUICHI (JP)
IWAMOTO HIROSHI (JP)
NAKATERA SHIGEO (JP)
OZAWA TETSURO (JP)

International Classes:

H01J29/07; (IPC1-7): H01J29/07

Foreign References:

JP2001250489A	2001-09-14
JP2000096189A	2000-04-04
JPH1025517A	1998-01-27

Other References: