JPS61163534A - Degasification process for image display device - Google Patents

Abstract

PURPOSE:To prevent deterioration of the cathode of a display device to secure a long life, as well as to reduce the size of the display device, by providing the chip off process after sealing and baking exhaust, and the chip off process after the exhaust connected to a superhigh vacuum system, and then operating the image display device after the both processes, to output luster. CONSTITUTION:At one end of a glass container 27 is fixed a baking exhaust chip tube 29 by a crystal frit 28 and at the other end of the container 27 is fixed a specific chip tube 30 for a superhigh vacuum exhaust. The chip tube 30 has a round portion 30a which is cracked after connected to the exhaust system, and a thick portion 30b which is chipped off after the exhaust is over. The chip tube 30 is connected to the superhigh vacuum system by an O ring 32. When a rotary pump 33, a turbo-molecular pump 34, and an ion pump 35 within the vacuum system are driven, connections 36 to 41 are opened or closed, and the generated superhigh vacuum value is confirmed with vacuum gauges 42 and 43. After the baking exhaust and the superhigh vacuum exhaust are over, the chip tubes are chipped off respectively, and then the image display device is operated to output luster, to obtain a compact size and a longer life of the display device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Use The present invention relates to a thin image display V in the field of video information equipment.
The present invention relates to a 4W1 degassing treatment method.

Prior Art Conventional color television image display devices include:
Cathode ray tubes are mainly used, but they are much longer in depth and have a larger volume than screens, and they also have extremely few built-in components such as electron gun electrodes and shadow masks, so they are advantageous in terms of both lifespan and manufacturing. Met. In recent years, thin image display devices such as plasma display devices, liquid crystal display devices, and EL (electroluminescence) displays have been developed following the development of the cathode ray tube.
Currently, it is insufficient in terms of performance such as contrast and color reproducibility of color display, and even if it is put into practical use, it is currently limited.

Below, l! 111, an example of a method for degassing electrode parts used in the conventional cathode ray tube described above will be described. FIG. 5 shows a conventional vacuum degassing treatment method. In FIG. 5, 1 is a vacuum degassing furnace, and a heater 2 and a sample stage 3 are built into the inner surface of the furnace. In order to create a vacuum in this vacuum degassing furnace 1, valve 4.
5.6.7 via rotary pump 8 and diffusion pump 9
On the other hand, it is also connected to the leak gas cylinder 12 via valves io and il. After placing the sample 13 to be vacuum degassed on the sample stage 3 in the vacuum degassing furnace 1 via the glass spacer 14, the rotary pump 8 and diffusion pump 9 are driven, and the vacuum gauge 15.
16, confirm that the indication on the vacuum gauge 16 has reached 1 o-ston. Next, the heater 2
Vacuum degassing treatment is performed by heating at 0 to 800°C for 30 to 60 minutes.

Problems to be Solved by the Invention However, with the degassing method described above, image display devices such as cathode ray tubes, which have very few built-in parts such as shadow masks and electron gun electrodes, have a problem in reducing the amount of gas emitted from the built-in parts. Although the effect is great because it can drastically reduce the amount of gas emitted from the built-in objects, thin image displays with extremely large built-in objects have the problem that the degassing method alone cannot sufficiently reduce the amount of gas released from the built-in objects. Ta.

The present invention provides a degassing method for a thin image display device that has a small volume and many built-in components and has a long lifespan.

Means for Solving the Problems In order to solve the above problems, the degassing method for an image display device of the present invention includes a thin uniform display device, a chip tube for baking back air, and an ultra-high vacuum. A first step of chipping off after sealing, baking and wax removal, comprising a special chip tube connected to the system and chipped off again after ffl high vacuum evacuation;
This includes a second step of chipping off after connecting to the ultra-high vacuum system and evacuation, and further includes a step of operating the image display device during the time of connecting to the ultra-high vacuum system and evacuation.

Effect of the present invention Since the amount of gas released from the built-in parts of a thin image display device cannot be sufficiently obtained by the normal vacuum degassing treatment of the built-in parts, the present invention requires a sealing → baking → chip-off process in the manufacturing process. In addition, we add a step of connecting to an ultra-high vacuum system and then chipping off after exhausting, thereby sufficiently exhausting malignant gases such as methane, carbon oxide, and carbon dioxide remaining in the image display device, and at the same time, The degree of vacuum can also be improved. At this time, if a raster is generated, gas can be released from the internal components by the electron beam from the cathode. As a result, deterioration of the cathode in the image display device can be prevented and its lifespan can be extended.

EXAMPLE Hereinafter, a gas processing method for a uniform display device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows the configuration of a thin image display device to which the present invention is directed. This thin image display device divides the screen into a plurality of sections in the vertical direction, and displays a plurality of lines by deflecting an electron beam in the vertical direction for each section.

Divide into multiple sections horizontally, and set RlG, B for each section.
The R, G, B
The irradiation of electron beams onto the phosphors is controlled by color video signals, and a television image is displayed as a whole. That is, in Figure 2,
In order from the rear to the front: the back side 11, the line cathode 18 as an electron beam source, and the vertical focusing electrode 19.19a.
, vertical deflection electrode 2G, m-beam flow control electrode 21,
Horizontal focusing electrode 22.22a horizontal deflection electrode 23, electron beam acceleration electrode 24, anode 25 and glass container 26.
27', these components are housed in the glass container and evacuated.

The operation of the thin uniform display device configured as described above will be described below.

Fig. 1 is a diagram explaining the process operation of the degassing treatment method of the present invention, Figs. 3 and 4 are thin image display devices in the processing process, and Fig. 3 is a diagram showing sealing -> baking - chip-off. External view after the process, Figure 4 shows degassing treatment using an ultra-high vacuum system.
An external view of the chip-off process is shown.

In FIG. 1, a chip tube 29 for baking back air is secured to the end of a glass container 27 with a crystalline frit 28.
It has a special tip tube 30 for ultra-high vacuum evacuation that is connected to the ultra-high vacuum system. The special tip tube 30 is provided with a round portion 30a that is split after being connected to an ultra-high vacuum system, and a thick wall portion 30b that is tipped off after being evacuated in the ultra-high vacuum system.

Metal terminals 31b and 31b connected to each electrode group in the image display device are used to add and take out signals to and from the display device.

FIG. 1 shows the uniform display vR apparatus of FIG. 3 connected to an ultra-high vacuum system via a special tip tube 30.

The special tip tube 30 is connected to an ultra-TS vacuum system with an O-ring 32, and a rotary pump 33 of the ultra-high vacuum system.
, turbo molecular pump 34, and ion pump 35, and opening and closing each valve 3G, 37, 38, 39, 40° 41 as appropriate, the vacuum gauge 42, 43 reaches the final 1o.
After confirming that the degree of ultra-high vacuum is below -aton, the linear introduction terminal 44 is rotated to lower the metal rod 44a connected to the tip of this linear introduction terminal 44, and the special chip tube 30 The round part 30a of the image display device is broken and malignant gases such as methane, carbon oxide, and carbon dioxide are sufficiently exhausted from the sealed glass container 26.27 of the image display device. Almost the same 10' ton
Check that the vacuum level has been reached. And the thick part 30
When the glass is heated with a gas burner and the glass is melted, the image display device is moved and sealed. FIG. 4 shows an external view of the image display device at this time.

In addition, after connecting to the ultra-high vacuum system, operate the image display device,
It is also possible to exhaust the gas while emitting a raster. Accordingly, gas can be emitted from the component by the electron beam from the cathode, further extending the life.

Effects of the Invention As described above, according to the present invention, a degassing treatment method including a first step of chipping off after sealing, baking and evacuation, and a second step of chipping off after connecting to an ultra-high vacuum system and evacuation. , various malignant gases in the image display device can be exhausted,
Deterioration of the cathode of the image display device can be prevented over a long period of time, making it possible to extend the life of the image display device. During this exhaust,
If the image display device is operated and malignant gases are sufficiently exhausted from the internal components by the electron beam flow, the effect will be even greater.Figure 3Figure 4

Claims (1)

[Claims] 1. Equipped with a baking exhaust chip tube fixed to the end of a glass container with a crystalline frit, and a special chip tube connected to an ultra-high vacuum system and tipped off again after ultra-high vacuum evacuation. A degassing method for an image display device, which uses the image display device and includes a first step of chipping off after sealing, baking and evacuation, and a second step of chipping off after connecting to an ultra-high vacuum system and evacuation. 2. A degassing method for an image display device according to claim 1, which comprises connecting the image display device to an ultra-high vacuum system, operating the image display device, evacuation while outputting a raster, and chipping off.