JPH03205750A - Image display device - Google Patents

Abstract

PURPOSE:To suppress the accumulation of gas in an anchor hole, improve the maintenance of the degree of vacuum, and extend the life of an image display device by providing a gas drain groove communicated to the anchor hole to increase the adhesive strength of an electrode. CONSTITUTION:A gas drain groove 51 communicated to an anchor hole 46 is provided on a horizontal deflecting electrode 40 by half-etching. When the adhesive glass is bitten into the anchor 46 provided for increasing the adhesive strength of the electrode 40 to assemble the electrode 40, gas can be extracted through the gas drain groove 51 communicated to the anchor hole 46, and the gas can be prevented from being left in the anchor hole 56. The maintenance of the degree of vacuum is improved, and the life of an image display device can be extended.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an image display device for video equipment. Conventional technology Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes are longer in depth than screens, making it difficult to manufacture thin television receivers. It was possible. In addition, although EL display elements, plasma display devices, liquid crystal display elements, and the like have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display.

Therefore, a new display device has been proposed in Japanese Patent Application Laid-Open No. 1-130453 (Japanese Patent Application No. 62-288762) to achieve a flat display device using electron beams. This method divides the screen into multiple sections vertically, deflects the electron beam vertically in each section to display multiple lines, and then divides the screen horizontally into multiple sections to display each line. The R, G, and B phosphors are made to emit light sequentially in each section, and the amount of electron beam irradiation to the R, G, and B phosphors is controlled by color video signals, so that the television image as a whole is is displayed. Figure 3 shows the internal configuration of a conventional image display device. In FIG. 3, l is a back electrode, 2a to 2c are line cathodes as electron beam sources, 3 is an electron beam extraction electrode, and 4 is a signal t.
5 is a focusing electrode, 6 is a horizontal deflection electrode, and 7a and 7b are vertical deflection electrodes. These components are housed in glass containers 8 and 9 in this order, and the inside of the container is evacuated. be. The back surface t-pole 1 is made of a flat conductive material, and Is
lljI is provided in parallel to the poles 2a to 2C.
The linear cathodes 2a to 2c are stretched horizontally so as to generate an electron flow with a substantially uniform current density distribution in the horizontal direction.
Multiple lines in the vertical direction at appropriate intervals (in this example, 2a
, 2b, and 2c) are provided. These wire cathodes 2a to 2C are made of, for example, tungsten wire with an oxide cathode material coated on its surface. The extraction electrode 3 faces the back electrode 1 via the line shadows 1i2a to 2c, and has through holes 1 provided at appropriate intervals in the horizontal direction.
The row 0 consists of conductive plates 11 provided on a horizontal line facing each of the line cathodes 2a to 2c. The signal electrode 4 is made up of a row of vertically elongated conductive plates 12 arranged at predetermined intervals at positions facing each of the horizontal through holes 10 in the extraction electrode 3. , a similar through hole 13 is provided at a position opposite to the through hole 10 of the extraction electrode 3.

The focusing electrode 5 consists of a conductive plate 15 provided with through holes 14 at positions facing each of the through holes 13 of the signal conductor [i4.

Horizontal deflection electric [! 6 is arranged to form a pair of horizontal deflection electrodes by elongated conductive plates 16a and 16b arranged vertically on the same plane so as to face each other in the middle of the row of through holes 14 of the focusing electrode 5. The whole area is fence-like.

The vertical deflection electrodes 7a and 7b are constructed by interlocking two comb-shaped conductive plates with appropriate intervals on the same plane.For example, for the electron beam 17, the lower conductive plate 18a and the upper conductive plate 18b are arranged to form a pair of vertical deflection electrodes.

The screen 19 is constructed by coating the inner surface of the glass container 8 with a phosphor 20 that emits light when irradiated with an electron beam, and further adding a metal back layer (not shown) thereon.

In the image subsection 21 formed by dividing the screen on the screen 19 into a plurality of sections in the vertical and horizontal directions, in order to obtain a highly uniform image with no visible seams in the image subsection 21, When processing and assembling electrodes, it is necessary to process and position each electrode with high precision. However, the electrode groups 3 to 6 and 7a, 7b are all thin conductive plates, and the through holes 13, 14, slits, etc. must be etched to control the processing precision down to the micron order.

In particular, when the horizontal deflection electrode 6 is made up of a large number of separate conductive plates 16a, 16b, the fourth
As shown in the figure, at the stage of parts before assembly, the conductive plate 16a
, 16b are appropriately provided with crosspieces 22, and connecting portions 23 are also provided on the outer periphery of the electrodes for connection.

Furthermore, it is connected to the electrode outer frame 29 by a connecting part 24, and is processed and manufactured by etching as a single piece that is partially connected. The connecting portion 25 is half-etched together with the connecting portion 24 in order to break off the electrode outer frame 29. Anchor holes 26 are provided to increase adhesive strength. A voltage is applied to the electrodes by means of electrode terminals 27 . The electrode is assembled using the electrode fixing hole 28.
The electrode outer frame 29 is provided to facilitate handling of the electrode. The electrode in FIG. 4 is a focusing electrode 5 as shown in FIG.
After the conductive plate 15 and the insulating spacer 30 are laminated and fixed with the adhesive glass 31, the unnecessary crosspiece 22 and the connecting part 23 of the electrode outer periphery are removed by a method such as laser beam cutting. electrically conductive plates 16a, 16
Divide b electrically. t[! Connection part 2 with outer frame 29
4 is separated by breaking off the outer frame. Further, this electrode is provided with an anchor hole 26 for increasing the adhesive strength with the insulating spacer 30, and an adhesive glass 31 is inserted into the anchor hole 26. Problems to be Solved by the Invention However, with such a structure, when the electrode is assembled with the adhesive glass 31, a gas reservoir 52 is formed in the anchor hole 26, as shown in FIG. 2(a). The problem was that gas remained in the vacuum container, lowering the degree of vacuum inside the vacuum container and shortening its life. The present invention solves this problem, and aims to provide an image display device with an electrode ellipse that can reduce gas remaining in the anchor hole. Means for Solving the Problems In order to solve the above problems, the image display device of the present invention includes:
A back electrode, a line cathode as an electron beam source, an extraction electrode, a signal electrode, a focusing electrode, a horizontal deflection electrode, a vertical deflection electrode, and a screen plate are arranged from the rear to the front of the screen, and these are connected to a flat glass bulb vacuum. This is a planar image display device housed inside, with a gas vent groove connected to the anchor hole held by the electrode to increase adhesive strength. Effect: With the above configuration, the adhesive glass can be inserted into the anchor hole that the electrode has to increase the adhesive strength! When assembling the pole, gas can be removed through the gas vent connected to the anchor hole, preventing gas from remaining in the anchor hole, reducing the vacuum level in the vacuum container and shortening the life. It can be reduced. EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a single component of a horizontal deflection electrode in an image display device according to an embodiment of the present invention. In the 111th, 4G is horizontal 1i direction @'l, 40a, 40b j,
This is a conductive plate for the horizontal deflection current [140], and corresponds to the conductive plates 16a and 16b in FIG. 42 is a conductive plate 40a,
A crosspiece 43 is used to hold the position of 40b, and 43 is a connecting part of the outer periphery of tS. Also, 44 is the outer periphery of the electrode! Extreme outside frame 4
9 is a joint that can be bent and broken off, and 45 is a joint between the outer frames, which is also half-etched. 46 is an anchor hole, 47 is an electrode terminal, 48 is an electrode fixing hole, and 49 is an electrode outer frame. Furthermore, a gas venting edge 51 connected to the anchor hole 46 is provided in the horizontal deflection electrode 4o by half etching. With this structure, as shown in FIG. 2(b), the anchor hole 4
6, gas can be prevented from accumulating, the degree of vacuum can be better maintained, and the life of the image display device can be extended. Effects of the Invention As described above, according to the present invention, the t-pole as a part before assembly has a structure in which a gas vent is provided leading to the anchor hole that is held in order to increase adhesive strength, so that the anchor hole has a gas vent hole that is connected to the anchor hole to increase adhesive strength. It is possible to prevent gas from accumulating in the anchor hole when the glass is inserted into the anchor hole, thereby improving the degree of vacuum and extending the life of the image display device.

[Brief explanation of drawings]

FIG. 1 is a plan view of a single component of a horizontal deflection electrode in an image display device according to an embodiment of the present invention, and FIG. 2(a). (b)
3 is a cross-sectional view illustrating the problems faced by conventional electrodes and the solution to the problems according to the present invention, FIG. 3 is an exploded perspective view of essential parts showing the internal structure of an image display device, and FIG. 4 is a plan view of a conventional horizontal deflection electrode. , FIG. 5 is an enlarged partial plan view illustrating the assembly procedure of a conventional horizontal deflection electrode. 1... Back electrode, 2a-2C... Line cathode, 3...
Extraction electrode, 4... Signal electrode, 5... Focusing electrode, 7
a7b... Vertical deflection electrode, 19... Screen, 4
0... horizontal deflection electrode, 41a, 4lb... conductive plate,
42... Crosspiece, 43... Connecting part, 44. 45...
・Connection part (half etching), 46... Anchor hole, 47... Electrode terminal, 48... Electrode fixing hole, 4
9... Electrode outer frame, 51... Gas vent groove, 52...
Gas pool.

Claims (1)

[Claims] 1. A back electrode, a line cathode as an electron beam source, an extraction electrode, a signal electrode, a focusing electrode, a horizontal deflection electrode, a vertical deflection electrode, and a screen plate are arranged from the back to the front of the screen, and these are connected to a flat glass bulb. A flat image display device housed in a vacuum, the image display device having an anchor hole provided in an electrode to increase adhesive strength and a gas vent groove connected to the anchor hole.