JPH0428141A - Manufacturing method for flat display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat display device for video equipment and a method for manufacturing the same.

2. Description of the Related Art In recent years, an attempt has been made to create a device capable of displaying color television images on a flat screen using electron beams. The electron beam is deflected vertically to display a plurality of lines, and is further divided into a plurality of sections horizontally, and phosphors such as R, G, and B are sequentially emitted in each section, and the R, G, etc. , B, etc., which display a television image as a whole by controlling the amount of electron beam irradiation onto the phosphors using color video signals. An example of the above-mentioned conventional flat panel display device will be described below with reference to the drawings.

As shown in FIG. 5, a conventional flat panel display device has a back electrode 1 . Linear cathode as electron beam source2. Beam extraction electrode 3. Signal electrode 4. Horizontal focusing electrode5. Horizontal deflection electrode 6.
A vertical deflection electrode 7 and a screen 8 are arranged, and the components are housed inside a glass container, which is evacuated.

An electron beam emitted from a cathode 2 serving as an electron beam source is transferred to a beam extraction electrode 3. Signal electrode 4. Horizontal focusing electrode5. Horizontal deflection electrode9. It is controlled by the vertical deflection electrode 7 and irradiates R, G, B, etc. phosphors on the screen to display an image. Beam extraction electrode 3° signal electrode 4. Horizontal focusing electrode5. The horizontal deflection electrode 6 and the vertical deflection electrode 7 are made of flat plate electrodes, and in order to keep them electrically insulated at predetermined intervals with precision, the beam extraction electrode 3. Signal electrode 4. Horizontal focusing electrode 5
．． Horizontal deflection electrode 6. A spacer whose surface is made of an insulating material is inserted between each of the vertical deflection electrodes 7, and the spacers are bonded and fixed via adhesive glass coated on the surface of the spacer. FIG. 6 shows a method for joining and fixing the signal electrode and beam extraction electrode.

In FIG. 6, 9 is a signal electrode, 10 is a beam extraction electrode, and 11 is a signal electrode whose surface is made of an insulating material. The spacer 12 inserted between the beam extraction electrodes 10 is an adhesive glass coated on the surface of the spacer 11 in advance by a method such as printing. Signal electrode 9. Beam extraction electrode 10. The spacer 11 is positioned with a positioning pin 14 set up on a firing substrate 13, and heated in a firing furnace 16 under pressure with a stamper 15 to the melting temperature of the bonding glass 12 to bond and fix. The bonding glass 12 is formed by bonding and fixing an electrode unit in which the signal electrode 9 or another electrode or a plurality of electrodes are previously bonded and fixed to the beam extraction electrode 10 using the same firing method in the next step. Crystalline powder glass (for example, #7575 manufactured by Iwaki Glass) is used to prevent these from being remelted when sealed in a glass container. Reference numeral 17 is a fan for equalizing the temperature in the firing furnace 16.

Problems that the invention aims to solve However, in this way the beam extraction electrode.

In this method, a spacer whose surface is made of an insulating material is inserted between each of the signal electrode, horizontal focusing electrode, horizontal deflection electrode, and vertical deflection electrode, and the bonding and fixing is performed via adhesive glass coated on the surface of the spacer. It is difficult to ensure the mutual positional accuracy between the flat electrodes, and because the spacer has a high dielectric constant, the capacitance between each flat electrode becomes large. Problems such as signal processing cannot be performed accurately, organic substances such as nitrocellulose contained in the adhesive glass applied to the surface of the spacer remain even after firing, and the degree of vacuum inside the glass container decreases after it is sealed. was there.

Means for Solving the Problems The present invention provides a linear cathode extending parallel to the screen at equal pitches in the vertical direction of the screen, and a linear cathode extending at a predetermined interval in order to control the linear electron beam emitted from the cathode. It consists of a beam extraction electrode, a signal electrode, a horizontal focusing electrode, a horizontal deflection electrode, a vertical deflection electrode, a phosphor, and a vacuum container for enclosing them.

An amorphous glass piece with a predetermined thickness and holes provided in the bonding holes provided in the portions of the electrodes where the electron beam does not pass through the spaces between the horizontal focusing electrodes, horizontal deflection electrodes, and vertical deflection electrodes is attached to each of the electrodes. A rod-shaped glass that crystallizes after melting is inserted between the bonding holes provided in the portions of each electrode where the electron beam does not pass through and the holes of the amorphous glass piece provided with the holes. The amorphous glass piece is softened, the rod-shaped glass is melted and crystallized, and the electrodes are precisely joined and fixed at predetermined intervals.

Function The function of the present invention is that when the respective electrodes are bonded and fixed, an amorphous glass piece having a predetermined thickness and provided with a hole is inserted into the bonding hole provided in the portion of each of the electrodes through which the electron beam does not pass. A rod-shaped glass inserted between each of the electrodes and crystallized after melting is passed through a bonding hole provided in a portion of each electrode where the electron beam does not pass through and a hole in the amorphous glass piece provided with the hole. By inserting and heating the amorphous glass piece, the electrodes are held at a predetermined interval while the amorphous glass piece is softened, and the rod-shaped glass is melted and crystallized to make the electrodes strong and precise. Can be fixed by joining.

EXAMPLE An example of the present invention will be described below with reference to the drawings. In FIG. 1, from the back to the front, 18 is a back electrode, 19 is a linear cathode as an electron beam source, 20 is a flat plate of a beam extraction electrode, a signal electrode, a horizontal focusing electrode, a horizontal deflection electrode, and a vertical deflection electrode. Layer the shaped electrodes,
Electrode block integrated by bonding and fixing, 2
Reference numeral 1 designates a screen, in which an electron beam emitted from a linear cathode 19 as an electron beam source is pushed out to the electrode block 20 side by a back electrode 18, converged and deflected in the horizontal and vertical directions in the electrode block 20, and is then transferred to a screen 21. upper R
, G, B, etc. are made to sequentially emit light.

Reference numeral 22 indicates a transfer device, and 23 indicates a transfer device, which maintains the inside of the container in a vacuum.

24 is a back electrode 18 using a regulating block to regulate the position of the cathode with grooves in order to regulate the position of the linear cathode 19.
Fixed. Reference numeral 25 denotes a cathode spring for stretching the cathode 19, and the position of the cathode is fixed to the regulating block 24. 26 is a back electrode fixing fitting for fixing the back electrode 18 to the photocopier 23; 27 is an electrode block 2;
This is an electrode block fixing fitting for fixing 0 to the back electrode 18. 28 is a cathode terminal for transmitting a signal from the outside of the container to the cathode;
It protrudes outside the container from the sealing surface 3. 29 is an electrode terminal for transmitting a signal from the outside of the container to each electrode of the integrated electrode block 20;
2 and the sealing surface of the transfer device 23 to the outside of the container.

30 is a sealing glass for sealing the backing device 22 and the backing device 23, and in one embodiment of the present invention, it is T029 made by Iwaki Glass.
are using.

In order to irradiate the electron beam to a predetermined position on the phosphor with a predetermined size, each electrode of the electrode block 21 needs to be joined and fixed with high precision and integrated.

FIG. 2 shows a method of bonding and fixing five electrodes in one step according to an embodiment of the present invention. In Fig. 2, 31 is a fired substrate which has a flatness of 20 μm or less and a surface roughness of 0.8 μmRmax or less, especially on the upper surface 32 that contacts the electrode. In one embodiment of the present invention, stainless steel 5US430 is used. are doing. 33 is a vertical deflection electrode placed on the upper surface 32 of the fired substrate. 34 is a horizontal deflection electrode placed on top of the vertical deflection electrode 33, 35 is a horizontal focusing electrode placed on top of the horizontal deflection electrode 34, and 36 is placed on top of the horizontal focusing electrode 35. The signal electrode 37 is a beam extraction electrode placed over the signal electrode 36. 38 is an amorphous glass piece with a predetermined thickness and a through hole provided in the thickness direction, and each electrode 33, 34, 35, 3
It is inserted between each electrode 33, 34, 35, 36, 37 in a joint hole 39 provided in a part where the electron beam of 6.37 does not pass.
0wt%, Sin2-33wt%, Nap.

12wt%, B 0-6wt%, 20-6wt%,
A glass having a composition of ZnO-2wt% and BaO-1wt% was used. 40 is a rod-shaped glass that crystallizes after melting, and is an amorphous glass having bonding holes provided in the portions of the electrodes 33, 34, 35, 36° 37 through which the electron beam does not pass, and through holes in the thickness direction. In one embodiment of the present invention, PbO-87 is inserted through the hole in the piece 38.
, 5wt%, B203-9.5wt%, ZnO-2wt
%, A 1203-0.6wt%, Sio, -0,
Glass having a composition of 4 wt% was used. The rod-shaped glass 40 is arranged to protrude from the hole provided in the beam extraction electrode 37 in consideration of outflow after melting. A stand bar 41 presses the electrodes 33, 34, 35, 36 degrees 37 and the amorphous glass piece 38 toward the firing substrate 31. The lower surface 42 of the stan bar that comes into contact with the electrode is made of stainless steel 5US430 with a flatness of 20 μm or less and a surface roughness of 0.8 μm Rmax or less, and protrudes from the hole 39 provided in the beam extraction electrode 37. A concave surface 43 is provided so as not to come into contact with the glass rod.

The mutual positioning of each electrode is performed by inserting a positioning pin (not shown) vertically erected on the fired substrate 31 into each electrode.

In this way, the electrodes 33, 34, 35, 36, 37 are arranged between the firing substrate 31 and the stamper 41 and heated.

In one embodiment of the present invention, as shown in the differential thermal curve of FIG.
℃, it is heated to 450°C in a firing furnace, held for about 1 hour, sufficiently crystallized, and then cooled. 450℃
Fig. 4 shows the state in which it has been heated to 100%. In FIG. 4, the rod-shaped glass 40 is completely melted and its upper end is connected to the beam extraction electrode 37.
The liquid flows into the electrode up to the vicinity of the hole 39 provided in the electrode. At this time, the transition point of the amorphous glass piece 38 placed between each of the electrodes 33, 34, 35, 36°37 is 380°C, and the yield point is 420°C.
℃, the softening point is 500℃, so the viscosity is about 108 Poise, and each of the electrodes 33, 34, 35, 36, 37
It acts as a damper without flowing out from between the stamper 41 and the stamper 41 can apply equal pressure to each electrode 33, 34, 35, 36, 37 while maintaining a constant spacing. 35.36°37 can be held with high precision. While this state is maintained for approximately one hour, the rod-shaped glass 40 is completely crystallized and a strong bond is completed.

In one embodiment of the present invention, a hole is provided in an amorphous glass piece and a rod-shaped glass is inserted into the hole.
．． It is not necessary to insert a rod-shaped glass if it is at the same position between 34, 35, 36.37, and each electrode has a high viscosity when heated to 450 ° C. Each electrode 33. 34. 35, 36. 3
7 may be maintained at a predetermined interval.

The bonding holes 39 of each electrode 33, 34, 35, 36, 37 are provided at a pitch of 20+n horizontally toward the screen and at a pitch of 5-n vertically, and the spacers are arranged continuously in the horizontal direction as in the conventional method. Unlike existing structures, there is significantly more space between each electrode (the capacitance between each electrode is significantly reduced to about 1/3 in one embodiment of the present invention).

In addition, the amorphous glass pieces and rod-shaped glass used in one embodiment of the present invention are made by reheating and molding an ingot that has been melted, and there is no organic material inside that would generate scum in a vacuum. There is no vacuum abnormality in one embodiment of the invention.

Further, in one embodiment of the present invention, the amorphous glass piece is heated to 450° C. for each of the electrodes 33, 34°, 35.36°.
．． 37 serves as a damper and holds each electrode with high precision, so that the mutual positional deviation of each electrode is 20 μm or less.

Effects of the Invention As described above, according to the present invention, when bonding and fixing each electrode, the beam extraction electrode, signal electrode, horizontal focusing electrode, horizontal deflection electrode, and vertical deflection electrode are stacked on a flattened fired substrate. , the spacing between the beam extraction electrode, the signal electrode, the horizontal focusing electrode, the horizontal deflection electrode, and the vertical deflection electrode is determined by forming a non-contact hole with a predetermined thickness in the bonding hole provided in the part of each electrode where the electron beam does not pass through. A piece of crystalline glass is inserted between each of the electrodes, and a rod-shaped glass that crystallizes after melting is formed into a bonding hole provided in a portion of each electrode where the electron beam does not pass through and an amorphous glass provided with the hole. The amorphous glass piece is inserted through the hole, the amorphous glass piece is softened, the rod-shaped glass is melted and crystallized, and the electrodes are accurately joined and fixed at predetermined intervals, thereby creating a gap between each electrode. It is possible to reduce capacitance, improve the degree of vacuum inside the vacuum container, and improve the mutual positional accuracy of each electrode, which greatly contributes to increasing the size of flat display devices using this method, improving reliability1 and improving image quality. We were able to.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a flat display device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a method for bonding and fixing flat electrodes of a flat display device according to an embodiment of the present invention.
Fig. 3 is a diagram showing thermoelectromotive force of glass in an embodiment of the present invention, Fig. 4 is a perspective view of a flat display device, and Fig. 6 is a diagram showing bonding of flat electrodes in a conventional flat display device. FIG. 3 is a cross-sectional view showing a fixing method. 18... Back electrode, 19... Linear cathode, 20... Electrode block, 21... Screen for, 22... Front container, 23 - Old... back container, 31... fired substrate, 33... vertical deflection electrode, 34... horizontal deflection electrode 5, 35...
...Horizontal convergence electrode, 36...Signal electrode, 37
...Beam extraction electrode, 38...Amorphous glass piece, 40...Bar-shaped glass, 41...
... Stamper agent's name Patent attorney Shigetaka Awano 1 person 1 person Diagram

Claims (1)

[Claims] A linear cathode that is parallel to the screen and stretched at equal pitches in the vertical direction of the screen, and beam extraction electrodes and signal electrodes that are overlapped at a predetermined interval to control the linear electron beam emitted from the cathode. , horizontal focusing electrode, horizontal deflection electrode,
It consists of a vertical deflection electrode, a phosphor, and a vacuum container for enclosing them, and the electron beam of each electrode passes through the interval between the beam extraction electrode, signal electrode, horizontal focusing electrode, horizontal deflection electrode, and vertical deflection electrode. A piece of amorphous glass having a predetermined thickness is inserted between each of the electrodes in the bonding hole provided in the part where the electron beam does not pass, and a rod-shaped glass that crystallizes after melting is provided in the part of each of the electrodes that the electron beam does not pass through. A planar type in which the amorphous glass piece is inserted so as to penetrate through the bonding hole, heated to soften the amorphous glass piece, melt and crystallize the rod-shaped glass, and bond and fix the electrodes at predetermined intervals. Display device manufacturing method