JPH065233A - Flat panel image display electrode unit - Google Patents

Abstract

(57) [Abstract] [Purpose] Inserting a spring member, an insulating member, and each electron beam control electrode into a metal pin with a collar, and applying a compressive force to the spring member, the other metal with a collar. By fixing the pin end part and the electron beam control electrode on the phosphor side by welding, the fixing force of each electron beam control electrode can be relaxed, and each electron beam control electrode generates heat from the linear hot cathode when the electrode unit is used. The purpose is to prevent deformation. [Structure] After arranging the spring member 3 and the stepped insulating spacer 2 on the flanged metal pin 1a, an electron beam control electrode 4e is formed.
4b and insulating spacers 5d to 5a are alternately inserted into the flanged metal pins 1a, a positioning plate for laser welding and a pressing member are arranged on the shelf-shaped electron beam control electrode 4a, and the spring member 3 is compressed. In the state, the shelf-shaped electron beam control electrode 4a
Then, the electron beam control electrodes 4a and 4b to 4e and the insulating spacers 5a to 5d are subjected to the reaction force of the spring member 3 by closely contacting the ends of the flanged metal pin 1a and performing laser welding. An interval is secured in the state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a television receiver,
The present invention relates to a method for manufacturing an electrode unit of a flat panel display device used for a computer terminal display or the like.

[0002]

2. Description of the Related Art In recent years, electron tube type flat panel display devices have been actively developed. This flat panel display device is similar in principle to a display device using a conventional cathode ray tube (CRT), but the distance from the cathode to the anode is significantly shortened as compared with the conventional CRT system, and the flat panel display device is made. To realize a thin display device. Therefore, a flat panel display device generally has a configuration in which a linear hot cathode and an electrode unit in which the distance from the cathode to the anode is extremely short are housed in a box-shaped vacuum container.

When a predetermined current is applied to the linear hot cathode,
An electron beam is emitted. The electrode unit is configured by stacking a plurality of flat plate-shaped electron beam control electrodes in which small-diameter holes and slits are etched with high positional accuracy in order to deflect, focus, and control the electron beam. Further, each electron beam control electrode has an insulating structure because the electric potentials are different when the electron beam is operated.

A conventional method of manufacturing an electrode unit will be described below with reference to the accompanying drawings. FIG. 2 is a cross-sectional view of a main part of a conventional display device, which includes a plurality of linear hot cathodes 106, an electrode unit 108, and a face glass 110. Although only one linear hot cathode 106 is illustrated in FIG. 2, several tens of linear hot cathodes are actually arranged in the left-right direction on the paper surface.
Further, a back container (not shown) is arranged on the upper surface of the linear hot cathode 106 and forms a vacuum container together with the face glass 110.

The electrode unit 108 includes a plurality of metal pins 10 on the electron beam control electrode 103a on the phosphor 109 side.
1a is butted and fixed by laser welding or the like, and the electron beam control electrodes 103b to 103e are connected to the insulating spacer 104a.
~ 104d are laminated at a predetermined interval to form a linear hot cathode 1.
The fixed insulating spacer 10 is attached to the metal pin end portion 101a on the 06 side.
After inserting 2, the end portion of the metal pin 101a protruding from the fixed insulating spacer 102 is laser-processed (for example, YA
Melting 101b by G laser) causes metal pin 101
The end of a is melted into a spherical shape, and the fixed insulating spacer 102
Can be locked, and each electron beam control electrode 103a-
In 103e, the electrode unit 108 in which the distance between the insulating spacers 104a to 104d is secured is completed.

The operation will be described below. When a heating current and an electron extraction pulse voltage are applied to the linear hot cathode 106, the electron beam is moved to the electron beam control electrode 103e.
Drawn towards.

Electron beam control electrodes 103e to 103a are formed with electron beam passage holes 107 or slits, and the electron beam control electrodes 103e to 103e are formed while the electron beam passes through these passage holes or slits. 1
The image is displayed by being controlled, focused, and deflected by the voltage applied to 03a, reaching the phosphor 109 to which a high voltage has been applied, and selectively causing the phosphor 109 to emit light.

[0008]

By melting the ends of the metal pins by laser processing, each electron beam control electrode is locked while the metal pins are expanded in the axial direction by thermal expansion. After that, the metal pin returns to normal temperature. That is, the cooling causes the metal pins to contract, and the electron beam control electrodes are more firmly fixed to complete the electrode unit. After arranging the electrode unit in the vacuum container, when a predetermined voltage is applied to generate an electron beam to the plurality of linear hot cathodes, the linear hot cathodes are heated to about 650 ° C, and the generated heat causes , Each electron beam control electrode is deformed by thermal expansion, resulting in electron beam landing displacement,
A good image could not be obtained.

The present invention solves the above-mentioned problems of the prior art, and satisfactorily controls the electron beam without causing thermal strain even when each electron beam control electrode expands or contracts due to thermal changes. It is an object of the present invention to provide an electrode unit for a flat panel display device capable of focusing and deflecting.

[0010]

To achieve this object, a method of manufacturing an electrode unit for a display device according to the present invention is directed to an electrode unit having a structure in which electron beam control electrodes are held at intervals by insulating spacers. In order to fix the electron beam control electrode, a metal pin with a collar,
It has a structure using a spring member.

[0011]

With the above structure, the fixing strength of each electron beam control electrode is relaxed by the spring member, and each electron beam control electrode is locked without applying an unreasonable force. Therefore,
The thermal expansion of each electron beam control electrode generated by applying a voltage to the linear hot cathode can be absorbed by the sliding of the insulating spacer and the electron beam control electrode, and the electrode unit can be deformed during use. There is no.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the main part of a display device according to the present invention. The collar portion 1b of the collared metal pin 1a is arranged in a plurality of counterbore portions formed at arbitrary locations on a welding base (not shown) in the shape of a sword, and then the spring member 3 and the stepped insulating spacer 2 are arranged. After inserting, the electron beam control electrodes 4e to 4b and the insulating spacers 5d to 5a are alternately inserted through the metal pins, and then the positioning plate for determining the welding position at the time of laser welding on the shelf-shaped electron beam control electrode 4a. By arranging the pressing member at the end, the shelf-shaped electron beam control electrode 4a and the end of the flanged metal pin 1a come into contact with each other, and at the same time, the spring member 3 is compressed and insulated from the stepped insulating spacer 2. With the reaction force of the spring member 3 applied to the spacers 5d to 5a and the electron beam control electrodes 4e to 4a, the end portions of the metal pins with a collar 1a and the shelf-shaped electron beam control electrode 4a are set to Y.
The electrode unit 9 is completed by performing butt welding with an AG laser.

[0014]

As described above, according to the present invention, the following effects can be obtained.

A plurality of electron beam control electrodes are formed on a metal pin with a collar by interposing a spring member between the insulating spacers, and after inserting each electron beam control electrode, an end portion of the metal pin with a collar.
When the shelf-shaped electron beam control electrodes are fixed by welding, the reaction force of the spring member is evenly applied to each electron beam control electrode, so that an interval of the thickness dimension of the insulating spacer can be secured between each electron beam control electrode. In addition, when the electrode unit is placed in a vacuum container and used, the amount of expansion does not change even if each electron beam control electrode or metal pin with a collar that has a different coefficient of thermal expansion due to the heat generated by the linear hot cathode thermally expands. An electron beam control electrode,
It is possible to absorb by sliding the insulating spacer, the electrode unit does not deform during use,
It is possible to obtain an image display device capable of displaying a good image without the landing shift of the electron beam.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electrode unit according to the present invention.

FIG. 2 is a sectional view of a main part of a conventional electrode unit.

[Explanation of symbols]

 1a Metal pin with collar 1b Metal pin collar 2 Stepped insulating spacer 3 Spring member 4a Shelf electron beam control electrode 4b-4e Electron beam control electrode 5a-5d Insulation spacer 6 Laser weld 7 Linear hot cathode 8 Electron beam passage Hole 9 Electrode unit 10 Phosphor 11 Face glass 101a Metal pin 101b Laser melting part 102 Fixed insulating spacer 103a to 103e Electron beam control electrode 104a to 104d Insulating spacer 105 Laser welded part 106 Linear hot cathode 107 Electron beam passage hole 108 Electrode unit 109 phosphor 110 face glass

Claims (2)

[Claims] 1. An electrode unit having a structure in which an electron beam control electrode is held at a distance by an insulating spacer, wherein a metal pin with a collar and a spring member are used for fixing the electron beam control electrode. A flat plate type image display electrode unit comprising: 2. The electrode unit according to claim 1, wherein both end faces of the flanged metal pin are perpendicular to the axis and the shaft portion is slightly tapered.