JPH01286241A - Plane type display device - Google Patents

Abstract

PURPOSE:To improve the picture quality by providing multiple flat plate-shaped electrodes, phosphors, holes provided at the preset interval on the portions of the flat plate-shaped electrodes where no beam passes, and insulators inserted into the holes and having the diameter of 2/3 or below of the diameter of the holes. CONSTITUTION:Ledges 16 are those of flat plate electrodes 15 where no beam passes, holes 17 are provided at the preset interval, stanchions 18 made of an insulator are inserted through them to support and fix the flat electrodes at the preset interval. When the stanchions 18 are large, the electric field of the holes 19 where beams pass is disturbed by the effect of the stanchions 18, the writing position of beams on a screen 20 is drifted in both the horizontal and vertical directions. When the diameter W1 of the stanchion 18 is 2/3 or below that of the ledge width W2 at the portion where no beam passes, a homogeneous picture with no effect is obtained. Low-melting point glass is inserted into the portions of the electrodes 15 where no beam passes, it is heated to the melting point, wettings 21 of the low-melting point glass are generated and firmly connected on the ledge 16. The flat plate electrodes have no deformation, the landing precision of beams on the screen plate is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flat display device for video equipment.

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 panel display using electron beams. The electron beam is vertically deflected for each section to display multiple lines, and it is further divided horizontally into multiple sections so that R, G, B, etc. fluorescers are sequentially emitted in each section. There is a device that displays a television image as a whole by controlling the amount of electron beam irradiation to the R, G, B, etc. 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. 6, the conventional flat panel display device has a back electrode 1. Line cathode as electron beam source2. Beam extraction electrode 3. Signal electrode 4. Horizontal focusing electrode 6° horizontal deflection electrode 6. A vertical deflection electrode 7 and a screen 8 are arranged, 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. Controlled by vertical deflection electrode 7, R on screen 8,
An image is displayed by irradiating G, B, etc. phosphors. Extraction electrode 3. Signal electrode 4. Horizontal focusing electrode 6. Horizontal deflection electrode 6
．． The vertical deflection electrode 7 is a flat plate electrode, and in order to keep the predetermined distances accurately insulated, a spacer whose surface is made of an insulating material is inserted between each, and an adhesive film coated on the surface of the spacer is used. Bonding and fixing is performed via melting point glass. Fig. 6 shows the joining and fixing method. In FIG. 6, reference numeral 9 denotes each flat electrode, 10 a spacer whose surface is made of an insulating material and inserted between each flat electrode, and 11 a spacer 1.
The flat electrodes 9 and spacers 10 are positioned using positioning pins 13 set up on the fired substrate 12, and are pressed with a stamper 14 to form an adhesive glass coated on the surface of the adhesive glass. Heating to the melting temperature of melting point glass,
Perform joint fixation.

Problems to be Solved by the Invention However, in such a structure in which a spacer is inserted between each flat electrode, thermal stress is generated between each flat electrode and the spacer 1o when they are bonded and fixed, causing the electrode to warp or Deformation occurred, disrupting the landing of the electron beam on the screen surface, and significantly reducing image quality. Furthermore, since a spacer is inserted between each flat electrode, if foreign matter adheres to the electrode, it cannot be reliably cleaned, which adversely affects the image. Furthermore, it is necessary to insulate the surface of the spacer, resulting in high cost.

Means for Solving the Problems In order to solve the above problems, the flat display device of the present invention includes holes provided at predetermined intervals in the part of the crosspiece between the cathodes of the flat electrode through which the beam does not pass. penetrate,
Each of the flat electrodes is supported and fixed by an insulating support column whose thickness is 2/3 or less of the width of the crosspiece.

Function: The present invention has the above-mentioned structure, and in order to support and fix the insulating support by inserting it into the hole provided in the part of the crosspiece where the beam of each of the flat electrodes does not pass, Bonding is possible, distortion due to thermal stress is eliminated, and each flat electrode can be supported and fixed with high accuracy. In addition, since the thickness of the insulator is less than 2/3 of the width of the part of the crosspiece that the beam does not pass through, the electric field in the part where the beam does not pass is not disturbed, and the beam at the part where the insulator is and other parts is It is possible to obtain a homogeneous image with no difference in landing accuracy on the screen.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of each flat electrode in an embodiment of the present invention. In FIG. 1, reference numeral 16 indicates each flat plate electrode. Reference numeral 16 is a crosspiece through which the beam of each flat electrode 15 does not pass. Holes 17 are provided in the crosspiece 16 at predetermined intervals, and insulating supports 18 are inserted through the holes 17 to connect each flat electrode. They are supported and fixed at predetermined intervals. Note that if the support 18 is thick, the electric field near the hole 19 through which the beam passes will be disturbed by the influence of the support 18, and the landing position of the beam on the screen 2o will be shifted both horizontally and vertically, resulting in an image of a portion of the insulator. Differences will occur in the image of the parts that are not included. Experiments have shown that when the daily diameter W1 of the support is 2/3 or less of the crosspiece width W2 of the portion through which the beam does not pass, a homogeneous image can be obtained with almost no influence. 21 is a linear cathode, which is stretched at equal pitches. The electron beam generated from the linear cathode 21 passes through each flat electrode 19 and reaches the screen 20.

In order to manufacture a flat display device having the above configuration, in one embodiment of the present invention, rod-shaped low melting point glass is attached to each flat plate electrode 1.
It is inserted into the part of the crosspiece through which the beam of No. 6 does not pass, and heated to the melting point of the low-melting point glass to form a welt 21 of the low-melting point glass on the crosspiece to obtain a strong bond. In one embodiment of the invention, p
A reliable and strong bond could be obtained by using low melting point glass of the b-type glass and heating it to 500° C. Next, a second embodiment of the present invention will be described with reference to FIG. 2.

In FIG. 2, 22 is each flat plate electrode, 23 is a crosspiece through which the beam does not pass, 24 is a hole provided at a predetermined interval, 26 is a preheating part, 26 is a low melting point glass, 27 is a pin, and 28 is a flat plate. In this embodiment, the low melting point glass 26 that has been heated to a semi-molten state in the preheating section 25 is pushed out with the pin 27,
By pressurizing between the pin 27 and the flat plate 28, a glass protrusion 29 is created between each flat plate electrode 22, and a strong bond is obtained. In this example, a low melting point glass such as PB glass was used, and by heating it to 460° C. in a preheating section, the low melting point glass was brought into a semi-molten state, and a reliable and strong bonding could be obtained.

Next, a third embodiment of the present invention will be described using FIG. 3.

In FIG. 3, 30 is each flat plate electrode, 31 is a crosspiece through which the beam does not pass, 32 is a hole provided at a predetermined interval, and 33 is a tapered insulating pin.

In this embodiment, a pin 33 is inserted into the hole 32 to obtain a strong connection. In one embodiment of the present invention, a predetermined interval is maintained between each flat electrode 31 in advance, and the pin 3
Insert a spacer 34 to prevent deformation during insertion of 3.
A strong joint could be obtained by press-fitting the ceramic taper pin 33 in the direction of arrow Z.

A fourth embodiment of the present invention will be described using FIG. 4.

In FIG. 4, 36 is each flat plate electrode, 36 is a bar through which the beam does not pass, 37 is an oval hole provided at a predetermined interval,
38 is an oval insulating pin.

In this embodiment, a pin 38 is inserted into the hole 37 and rotated about the axis to obtain a strong connection. In addition, in the embodiment, the long axis o, 8. An elliptical hole with a minor axis of 0.6 and a major axis of 0.65. A strong joint could be obtained by inserting a ceramic pin 38 having an oval shape with short axes o and e and rotating the pin 38 900 times around the axis.

Effects of the Invention In this way, in the present invention, insulating supports are inserted into the holes provided in the parts of the crosspieces of each flat electrode through which the beams do not pass, and are supported and fixed. This eliminates deformation of each flat electrode due to stress and other distortions, improves the accuracy of the beam's landing on the screen plate, and significantly improves image quality.

In addition, since the thickness of the insulating pillars is less than 2/3 of the width of the part of the crosspiece through which the beam does not pass, it was possible to obtain a homogeneous screen without disturbing the electric field in the part through which the beam passes.

[Brief explanation of the drawing]

FIG. 3 is a cross-sectional view of a main part of a flat display device according to a third embodiment of the present invention; FIG.
4(a) and 4(b) are sectional views of main parts of a flat display device according to a fourth embodiment of the present invention, FIG. 6 is a perspective view of a conventional flat display device, and FIG. FIG. 15.22, 31, 35... each flat plate electrode, 17
゜24.32,37...hole, 18...group/support, 28...low melting point glass, 33,38...
...Insulated pin. Name of agent: Patent attorney Toshio Nakao and 1 other person21
-11-made quality 4-y Fig. 4 Fig. 6

Claims (4)

[Claims] (1) A linear cathode stretched at equal pitches in a direction perpendicular to the screen, a plurality of flat electrodes for controlling the linear beams emitted from the cathode, a phosphor, and a plurality of flat electrodes. A flat display device comprising holes provided at predetermined intervals in a portion through which a beam does not pass, and an insulator inserted into the hole and having a diameter of 2/3 or less of the diameter of the hole. (2) A flat display device according to claim 1, wherein a rod-shaped low melting point glass is inserted into a hole provided in a portion of each flat electrode through which the beam does not pass. (3) The flat display device according to claim 1, wherein a tapered insulating pin is press-fitted into a portion of the crosspiece through which the beam of each flat electrode does not pass. (4) The flat display device according to claim 1, wherein the insulating pin has an elliptical shape.