JPH05101793A - Flat panel display - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a flat-panel display device capable of accurately joining vertical deflection electrodes while maintaining flatness when joining and fixing a plurality of flat plate-like electrodes. [Structure] A linear cathode 20, a plurality of flat plate-shaped electrodes 21 stacked at a predetermined interval to control a linear electron beam emitted from the cathode 20, and a phosphor 22 formed on an anode surface. , A bonding glass provided at a joint provided in a portion of the plurality of flat plate electrodes 21 through which an electron beam does not pass, and a vacuum container for enclosing them, Thick crosspieces 2 in which the vertical deflection electrodes are alternately meshed in the horizontal direction when viewed from the anode surface.
5, 26, each of which has a structure in which thick bars of the vertical deflection electrodes, which are alternately meshed with each other, are connected by a small piece 27 provided with half etching, and the vertical deflection electrodes are bonded to the plurality of other flat plate-shaped electrodes by the adhesive. The small piece provided with the half-etching is removed from the half-etched portion after bonding through the glass for use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device for video equipment.

[0002]

2. Description of the Related Art In recent years, for the purpose of achieving a device capable of displaying a color television image in a flat type by using an electron beam, the screen on the screen is divided into a plurality of sections in the vertical direction. The electron beam is deflected vertically for each section to display a plurality of lines, and further divided into a plurality of sections in the horizontal direction for R, G, and B for each section.
Are made to sequentially emit light, and their R, G, B
There is a system in which a television image is displayed as a whole by controlling the irradiation amount of an electron beam to a phosphor such as a color video signal. An example of the above-described conventional flat-panel display device will be described below with reference to the drawings.

In the conventional flat-panel display device, as shown in FIG. 3 showing its concrete structure, a flat electrode 1, a linear cathode 2 as an electron beam source, and a cathode 2 are sequentially output from the rear to the front. A front container 5 made of glass, which is composed of a plurality of flat plate-shaped electrodes 4 for controlling an irradiation amount by focusing an electron beam on a predetermined phosphor on the screen 3.
These components are housed inside a back container 6 made of glass and metal to create a vacuum inside the container. In order to control the electron beam emitted from the cathode 2 as an electron beam source, to irradiate a fluorescent substance such as R, G, B on the screen to display an image, the flat plates of the plurality of flat plate-like electrodes are used. It is necessary that the electrode-shaped electrodes are electrically insulated at a predetermined interval with high precision, and the bonding glass is arranged at the bonding portion provided in the portion through which the electron beam of each of the plate-shaped electrodes does not pass. Each plate electrode is bonded and fixed through the bonding glass.

FIG. 4 shows a method of joining and fixing the flat plate-like electrodes. In FIG. 4, 7 is each flat plate-shaped electrode set on the firing substrate 8, and 9 is set between the flat plate-shaped electrodes 7 at a joint portion provided between the flat plate-shaped electrodes 7 where the electron beam does not pass. Bonding glass 10, 10 is a glass for holding a space between the flat electrodes 7, which is provided at a bonding portion of the flat electrodes 7 through which the electron beam does not pass, and 11 is a firing substrate 8.
The positioning pins that are set up vertically penetrate through the positioning square holes 12 provided in each plate-shaped electrode 7 to mutually position each plate-shaped electrode 7. In this state, the pressure of the stamper 13 on each flat electrode 7 is maintained in the firing furnace while the glass for bonding is melted and then heated to a temperature at which the glass is crystallized, and then cooled to room temperature again to complete the bonding and fixing of each flat electrode. To do. 1
Reference numeral 4 denotes a sphere that holds the bottom of the positioning pin 11 between the firing substrate 8 and the pin housing 15 in order to allow the positioning pin 11 to freely move in the horizontal direction during thermal expansion of each flat plate-shaped electrode 7. is there. Reference numeral 16 is a metal plate for protecting the firing substrate 8 and the stamper 13.

[0005]

However, even if such a joining and fixing method is used, the vertical deflection electrode has a non-rigid structure composed of thick bars 17 and 18 which are alternately engaged in the horizontal direction as shown in FIG. However, the image quality of the flat panel display device is remarkably deteriorated by forming a block of each flat plate electrode that is partially fixed to another flat plate electrode while being deformed due to thermal stress during firing and having a different deflection sensitivity. In particular, the larger the electrode for a large screen, the more remarkable the deformation due to the thermal stress during firing, which has been a major obstacle in increasing the size of the flat panel display device.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a linear cathode, a plurality of flat electrodes stacked at a predetermined interval to control a linear electron beam emitted from the cathode, and an anode surface. And a bonding glass provided at a bonding portion provided at a portion where electron beams of the plurality of plate-shaped electrodes do not pass through, and a vacuum container for encapsulating these. Among the plate electrodes, the vertical deflection electrodes are composed of thick bars that are alternately meshed in the horizontal direction when viewed from the anode surface, and the alternately meshed thick bars of the vertical deflection electrodes are connected by a half-etched small piece. In the structure, the vertical deflection electrode is joined to the plurality of other flat plate-shaped electrodes through the bonding glass, and then the small piece provided with the half etching is removed from the half etching portion. .

[0007]

The function of the present invention is to sinter each of the flat electrodes and the bonding glass in a flat display device in which a plurality of flat plate electrodes for control are arranged between a linear cathode and a screen on which phosphors are arranged. In the method of arranging between the substrate and the stamper, bonding and fixing by heating with pressure and heating with each electrode with an adhesive glass that crystallizes after melting, the vertical deflection electrode among the plurality of flat plate electrodes is seen from the anode surface. It is composed of thick bars that are meshed alternately in the horizontal direction, and the thick bars that are meshed alternately are connected by small pieces with half-etching, so the vertical deflection electrodes can be bonded accurately while maintaining flatness. It can be joined to the plurality of other flat plate-shaped electrodes through glass, and thereafter the small piece provided with the half etching is removed from the half etching portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, from the rear to the front, 19 is a back electrode, 20 is a linear cathode serving as an electron beam source, and 21 is a layered electron beam that is emitted from the cathode and is overlapped at a predetermined interval to control the linear electron beam. A plurality of flat plate-shaped electrodes and 22 are screens. An electron beam emitted from a linear cathode 20 as an electron beam source is extruded by a back electrode 19 toward a plurality of flat plate-shaped electron electrodes 21 and converged horizontally and vertically in the plurality of flat plate-shaped electrodes 21.
The phosphors such as R, G, B on the screen 22 are deflected to sequentially emit light. Reference numeral 23 is a front container, and 24 is a back container, and the inside of the container is kept in a vacuum.

In order to irradiate a predetermined position of the phosphor with a predetermined size by irradiating the electron beam, each flat plate electrode of the plurality of flat plate electrodes 21 must be accurately joined and fixed and integrated. There is.

FIG. 2 shows a flat plate electrode 21 according to an embodiment of the present invention.
A vertical deflection electrode for vertically deflecting the electron beam emitted from the cathode 19 is shown.

In FIG. 2, 25 and 26 are anode surfaces.
Seen from above, the thick crosspieces that mesh with each other in the horizontal direction, 27 are
In the etching part 28 (shown by the broken line),
Connect to the thick crosspiece 26 with the etching part 29 (shown by the broken line)
It is a small piece. The vertical deflection electrode with such a structure is
The flatness is 20 because it is accurately bonded and fixed to another flat plate electrode.
μm or less, surface roughness is 0.8μ especially on the upper surface in contact with the electrode
Place on a fired substrate finished to mRmax or less and contact
Thick rails 25 and 26 through which the electron beam does not pass through the worn glass
Place it at the position shown by the two-dot chain line 32 above,
Flat electrodes (not shown) are stacked, and the flatness is 20μ.
m or less, surface roughness is 0.8 μm especially on the lower surface in contact with the electrode
Weigh a stamper (not shown) finished below Rmax
Gently press and press the horizontal deflection electrode against the fired substrate for adhesion
Heat the glass for melting to the melting temperature
Then, it is joined to another plate electrode. In one embodiment of the invention
As a bonding glass, the cross-sectional shape is 0.5 square and the composition is PbO.
-87, 5 wt%, B_TwoO _Three-9, 5 wt%, ZnO-2
wt%, SiO_Two-0.4 wt%, Al_TwoO_Three-0.6w
t% and place a crystallized glass rod that crystallizes after melting
ing. During this time, the thick crosspieces 2 that are alternately engaged in the horizontal direction
5 and 26 are connected by a thin wire 27 and fired in the same state as a single plate
It has been pressed against the substrate and has reached the melting temperature of the bonding glass.
Even if it is heated in the
Other plate-shaped electrodes (not shown)
No)) can be joined.

After the joining is completed, the half-etched portion 28.2
The small piece 27 is removed from 9. Reference numeral 31 is a connecting portion between the thick crosspieces 25 and 26, and the vertical deflection electrode is joined to another flat plate electrode and then cut to be electrically separated. As a result, the deflection voltage can be applied to the upper and lower thick bars 25 and 26 of the slit portion 32 through which the electron beam passes. In one embodiment of the present invention, the cutting is performed by a YAG laser.

In the embodiment of the present invention, the method of joining the vertical deflection electrode and another flat plate electrode is shown. However, the same effect can be obtained by joining other flat plate electrodes at the same time as the vertical deflection electrode. Is obtained.

[0014]

As described above, according to the present invention, when a plurality of flat plate-like electrodes are joined and fixed, other flat plate-like electrodes can be joined accurately while maintaining the flatness of the vertical deflection electrode. Even in the flat panel display device, the deflection sensitivity of the electron beam in the horizontal direction becomes uniform over the entire screen, which can greatly contribute to the improvement of the image quality and the size increase of the flat panel display device.

[Brief description of drawings]

FIG. 1 is a sectional perspective view showing a flat-panel display device according to an embodiment of the present invention.

FIG. 2 is a plan view of a vertical deflection electrode of a flat panel display device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional perspective view showing the configuration of a conventional flat-panel display device.

FIG. 4 is a diagram showing a method for joining and fixing flat plate electrodes of a conventional flat display device.

FIG. 5 is a plan view of a conventional vertical deflection electrode.

[Explanation of symbols]

 19 Back Electrode 20 Linear Cathode 21 Plural Flat Plate Electrodes 22 Screen 24 Front Container 25 Back Container 25 Thick Crosspieces Interlocked Alternately in Horizontal Direction 27 Small Piece 28 Half Etching Part 32 Slit Part through which Electron Beam Passes

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Hori 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A linear cathode that is parallel to the screen and is stretched at equal pitches in the vertical direction of the screen, and a plurality of linear cathodes that are superposed at a predetermined interval to control a linear electron beam emitted from the cathode. Of the flat electrode, the phosphor formed on the anode surface, the bonding glass provided at the joint provided at the portion of the plurality of flat electrodes through which the electron beam does not pass, and for encapsulating these. It is composed of a vacuum vessel, and among the plurality of flat plate-shaped electrodes, vertical deflection electrodes are composed of thick bars that are alternately meshed in the horizontal direction when viewed from the anode surface. The vertical deflection electrode is joined to the other flat plate-like electrodes through the bonding glass and then the half-etched piece is used as a half-etching part. Flat panel display that has been removed.