JPH02309537A - Plane type display device and its manufacture - Google Patents

Abstract

PURPOSE:To support and fix individual plate electrodes with good precision and no deposition of foreign matters by fixing the plate electrodes at the portion which electronic beams do not pass through using a pole glass which absorbs a specified wave length of infrared ray. CONSTITUTION:A glass pole which absorbs infrared rays of wave length 900mm or more is inserted into a hole 26 which is provided in plate electrodes held in a preset space and which electronic beams do not pass through, and it is irradiated with infrared rays, heated at up to its melting point and outflowed by its weight into the lower face 28 of the hole 26, allowing strong joining and fixing. In case of irradiation with infrared rays, the glass pole can be heated at up to its melting point 600 deg.C at a high speed within ten minutes to allow the joining and fixing to be finished with less thermal damage to the plate electrodes and good precision. If environment where the joining and fixing are performed is defined as class 1000 or so, the deposition of foreign matters on the plate electrodes, having influence on the orbit of the electronic beams, can be greatly reduced.

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.

BACKGROUND OF THE INVENTION In recent years, an attempt has been made to create a device that can display color television images on a flat screen using electron beams. The electron beam is vertically deflected to display multiple lines, and then horizontally divided into multiple sections, each section is made to emit R, G, B, etc. phosphors sequentially. , G, B, etc., by controlling the amount of electron beam irradiation on phosphors such as phosphors, G, B, etc., using color video signals to display a television image as a whole. An example of the above-mentioned conventional flat panel display device will be described below with reference to the drawings.

As shown in FIG. 4, a conventional flat panel display device has, in order from the rear to the front, a back electrode 1, a cathode 2 as an electron beam source, and a cathode 2, which serves as an electron beam source. Beam extraction electrode 3.
Signal electrode 4. Horizontal focusing electrode 6° horizontal deflection electrode 6. It is constructed by disposing a vertical deflection electrode 7 and a screen 8, and the components are housed inside the glass container, which is then evacuated. An electron beam emitted from a line cathode 2 serving as an electron beam source is transferred to a beam extraction electrode 3. Signal electrode 4. Horizontal focusing electrode 6. Horizontal deflection electrode 6. It is controlled by the vertical deflection electrode 7 and irradiates the R, G, B, etc. phosphors on the screen 8 to display an image.

Extraction electrode 3. Signal electrode 4. Horizontal focusing electrode 6. Horizontal deflection electrode 6. The vertical deflection electrode 7 consists of a flat plate electrode, and a spacer whose surface is made of an insulating material is inserted between each in order to maintain predetermined intervals insulated with high accuracy, and a low melting point adhesive is applied to the surface of the spacer. Bonding and fixing is performed through glass. FIG. 5 shows the joining and fixing method. In FIG. 6, reference numeral 9 denotes each flat electrode, 1o a spacer whose surface is made of an insulating material and inserted between each flat electrode, and 11 a low melting point glass for adhesion coated on the surface of the spacer 10. The spacer 10 is positioned with a positioning bottle 13 set up on a firing substrate 12, and heated with a stamper 14 under pressure in a firing atmosphere furnace 15 to the melting temperature of the low melting point glass for bonding, thereby performing bonding and fixing. . 16 is a fan for equalizing the temperature in the firing atmosphere furnace.

Problems to be Solved by the Invention However, there is a method in which a spacer is inserted between each of the flat electrodes, which is pressurized by a firing substrate and a stamper during bonding and fixation, and heated in a firing atmosphere furnace. So,
It takes time to heat up and cool down, leading to long lead times and causing oxidation and thermal deformation of each flat electrode.

In addition, even if clean air is supplied into the furnace, since the air inside the furnace is kept flowing by a fan that maintains uniform heat, oxides generated from jigs and the furnace wall may be contaminated as foreign substances at each flat plate electrode. There were cases where it could flow into the interior and adhere to the inside.

Further, since pressure is applied by the stamper's own weight, the flat electrodes may be deformed or the flat electrodes may be misaligned when crushing the molten low melting point glass for bonding.

Furthermore, it is necessary to insulate the surface of the spacer, resulting in high cost.

Means for Solving the Problems The first aspect of the present invention is to control a linear cathode that is parallel to the screen and stretched at equal pitches in the vertical direction of the screen, and a linear electron beam that is also emitted from the cathode. It consists of a plurality of flat plate electrodes, a phosphor, and a rod-shaped glass that absorbs infrared rays having a wavelength of 9001 m or more, in which the plurality of flat plate electrodes are electrically insulated and held at intervals of a predetermined melting diameter.

A second aspect of the present invention is a laser oscillation device capable of continuous oscillation, and a plurality of flat electrodes stacked at predetermined intervals, each of which is inserted so as to pass through each hole provided in a portion through which the beam does not pass. It consists of a condensing lens unit for condensing laser light onto the end face of a rod-shaped glass that absorbs infrared rays with a wavelength of 900 nm or more, and means for transmitting the laser by connecting the oscillation device and the condensing lens, This method selectively melts rod-shaped glass by irradiating it with continuous wave laser light.

Function The function of the first aspect of the present invention is that, in order to control the electron beam emitted from the cathode, a plurality of flat electrodes stacked at a predetermined interval are passed through each hole provided in a portion where the beam does not pass. By heating and melting a rod-shaped glass that absorbs infrared rays with a wavelength of 900 nm or more with an infrared heating device, the plurality of flat electrodes are electrically insulated at predetermined intervals and bonded and fixed. It is possible to support and fix the flat electrode with high precision and without adhesion of foreign matter.

The effect of the second aspect of the present invention is that infrared rays with a wavelength of 900 nm or more are inserted so as to pass through each hole provided in a portion of a plurality of flat electrodes stacked at a predetermined interval through which the beam does not pass. Continuously oscillated laser light is focused on the end face of the absorbing rod-shaped glass to selectively and efficiently heat and melt the rod-shaped glass, and the plurality of flat electrodes are electrically insulated at predetermined intervals and bonded and fixed. As a result, each flat electrode can be supported and fixed with high precision and without any foreign matter adhering to it.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of a flat display device according to a first embodiment of the present invention. In FIG. 1, 17 is a cathode which is parallel to the screen 18 and is stretched at equal pitches in the vertical direction as an electron beam source, and 19 is a back electrode that pushes the linear electron beam 2o emitted from the cathode 17 toward the screen 18. , 21 are a plurality of flat plate electrodes for deflecting or focusing the electron beam 2o horizontally and vertically, and irradiating the fluorescent material at a predetermined position on the screen 18 to display an image. Each of the flat electrodes 21 is provided with a hole 22 through which an electron beam of a predetermined size passes.
The electron beam 2o is controlled by the shape of the electron beam 2o. The spacing between the flat electrodes 21 and the positional accuracy of the holes 2o greatly contribute to the landing accuracy of the electron beam 20 onto the screen 18. 23 is a glass rod that absorbs infrared rays having a wavelength of 900 nm or more, and is inserted into a hole 24 provided in a portion of the flat plate electrode 21 where each beam does not pass, and is heated and melted by irradiation with infrared rays, thereby causing each glass rod to emit light. Each of the flat electrodes 21 is joined and fixed with high precision and held. FIG. 2 is a cross-sectional view showing a method of bonding and fixing a plurality of flat electrodes 21 by melting the glass rod 23. In FIG. 2, reference numeral 26 denotes a plurality of flat plate electrodes held at predetermined intervals by a jig, and a wavelength of 900 nm is placed in a hole 2e through which the electron beam does not pass.
A glass rod that absorbs infrared rays of nm or more is inserted, and the glass rod 27 emits infrared rays from the directions of arrows a and b.
By heating the glass rod 28 to the melting temperature of , the glass rod 28 flows out under its own weight to the lower surface 28 of the hole 26, thereby making it possible to firmly bond and fix the glass rod 28. When infrared rays are irradiated from the two directions of arrows a and b, the melting temperature of the glass rod rapidly reaches 600'C within 10 minutes.
We were able to complete the bonding and fixing with high precision with little heat damage to the flat electrodes. In addition, when the bonding and fixing environment is set to about class 1000, it is possible to significantly reduce the adhesion of foreign substances that adhere to the flat electrode and affect the trajectory of the electron beam, and the electrode block composed of multiple flat electrodes The structure is simple, and even if foreign matter adheres to it, it is easier to clean it in the post-process.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a cross-sectional view showing a method of bonding and fixing a plurality of flat electrodes by irradiating with laser light in a second embodiment of the present invention. In FIG. 3, numeral 29 is a laser oscillation device capable of continuous oscillation, and in one embodiment of the present invention, a YAG laser was used. 3o is an electrode with a wavelength of 900 nm or more inserted so as to pass through each hole 32 provided in a portion of the plurality of flat plate electrodes 31 for controlling the electron beam emitted from the cathode of the flat display device, where the electron beam does not pass through. This is a condensing lens unit for condensing a laser beam 34 on the end face of a rod-shaped glass 33 that absorbs infrared rays.
is a path connecting the laser oscillation device 29 and the focusing lens unit 30 to transmit the laser light, and in one embodiment of the present invention, an optical fiber is used. In one embodiment of the present invention, only the glass rod can be heated and melted by irradiating the end face of the glass rod for 10 seconds with a continuously oscillated so-low YAG laser, thereby forming a strong bond at the lower surface 36 of the hole 32. It has become possible. The plurality of flat electrodes are held in advance with precision at predetermined intervals by a jig, and when bonding and fixing, only the glass is heated with the laser beam 34, so there is no deformation or oxidation due to heat, and the flat electrodes are held with high precision. Blocks can be formed.

If the end face of the glass is irradiated with pulsed Y-G laser light, the glass will be destroyed by rapid thermal shock, making it impossible to join with high precision. Only in this case can blocks of flat plate electrodes be formed with good precision.

Effects of the Invention As described above, according to the first aspect of the present invention, in order to control the electron beam emitted from the cathode, a plurality of flat plate electrodes overlapped with precision at a predetermined interval are used to emit infrared rays having a wavelength of 900 inches or more. By using rod-shaped absorbing glass and fixing it in a part where the electron beam does not pass through, it has become possible to form a simple, precise, flat plate electrode block with less oxidation and foreign matter adhesion, and the manufacturing process has also been significantly shortened. This makes it possible to significantly improve image quality and reduce costs of flat display devices.

Further, according to the second aspect of the present invention, in order to control the electron beam emitted from the cathode, the wavelength of the plurality of flat plate electrodes stacked accurately at predetermined intervals is inserted into the hole in the part where the electron beam does not pass. By concentrating continuous wave laser light on the end face of a rod-shaped glass that absorbs infrared rays of 90Onl11 or more, it is possible to locally and efficiently heat the block of flat electrodes with good precision and less oxidation and foreign matter adhesion. This makes it possible to form a flat panel display device, thereby contributing to a significant improvement in image quality of a flat display device.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the configuration of a flat display device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a method of bonding and fixing a plurality of flat plate electrodes according to an embodiment of the present invention, and FIG. is a sectional view showing a method of bonding and fixing a plurality of flat plate electrodes by irradiating a laser beam in a second embodiment of the present invention;
FIG. 4 is a perspective view showing a specific configuration of a conventional flat panel display device, and FIG. 6 is a diagram showing a main part configuration showing a conventional method of bonding and fixing each flat plate electrode. 1A...Cathode, 18...Screen, 1
9... Back electrode, 21... Flat plate electrode,
23... Rod-shaped glass, 29... Laser oscillation device capable of continuous oscillation, 3o... Condenser lens unit, 35... Transmits laser light. route. Name of agent: Patent attorney Shigetaka Awano and one other person
y-mbunt. 1B-19 in one stroke...-Rear electric board Figure 2A

Claims (2)

[Claims] (1) A linear cathode that is parallel to the screen and stretched at equal pitches in the vertical direction of the screen, and a plurality of flat plates stacked at predetermined intervals to control the linear electron beams emitted from the cathode. The electrode, the phosphor, and the plurality of flat plate electrodes are inserted so as to pass through each hole provided in a portion where the beam does not pass through, and after melting, the plurality of flat plate electrodes are electrically insulated at a predetermined interval. A flat display device made of rod-shaped glass that absorbs infrared rays with a retained wavelength of 900 nm or more. (2) A laser oscillation device capable of continuous oscillation and a plurality of flat plate electrodes stacked at a predetermined interval to control the electron beam emitted from the cathode of the flat display device are installed in the part where the electron beam does not pass through. a condensing lens unit for condensing laser light on the end face of a rod-shaped glass that is inserted so as to pass through each hole and absorbs infrared rays with a wavelength of 900 nm or more;
A flat display device comprising a path for transmitting laser light by connecting the oscillation device and a condensing lens, and selectively melting the rod-shaped glass by condensing and irradiating continuous wave laser light onto the end face of the rod-shaped glass. Production method.