JPH0574383A - Image display device - Google Patents

Abstract

PURPOSE:To solve the dispersion in stretching tension and positional precision of a linear cathode in an image display device used in a video equipment and provide an image display device of high quality with no disconnection. CONSTITUTION:An insulating support body 11 has a through hole 12 and a counter-bored hole 13. A connecting terminal 14 for stretching a linear cathode having a wedge claw 15 on the top end is inserted to the through hole 12 and bent, whereby the wedge claw 15 is bitten into the counter-bored hole 13, and the insulating support body 11 is firmly fixed to the connecting terminal 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device in video equipment.

[0002]

2. Description of the Related Art Conventionally, a cathode ray tube has been mainly used as a display element for displaying a color television image, but a conventional television tube has a very long depth as compared with a screen, and a thin television receiver is manufactured. It was impossible to do. Moreover, although EL display elements, plasma display elements, liquid crystal display elements, etc. have recently been developed as flat panel display elements, none of them are sufficient in terms of performance such as luminance, contrast, color reproducibility of color display. However, it takes time for practical use. Therefore, for the purpose of achieving a device capable of displaying a color television image on a flat panel display device using an electron beam, the screen on the screen is divided into a plurality of sections in the vertical direction. The electron beam is deflected vertically for each to display a plurality of lines, and further divided into a plurality of sections in the horizontal direction so that phosphors such as R, G, and B are sequentially emitted in each section,
The television image display device is used as a precedent example by controlling the irradiation amount of the electron beam to the phosphors such as R, G, and B by the color image signal.

An example of the above-mentioned conventional image display device will be described below with reference to the drawings. 13 and 1
Reference numeral 4 denotes a conventional image display device. In FIG. 13, 1 is a line cathode as an electron beam source, 2a and 2b are support bases for supporting and fixing both ends thereof, 3 is a control electrode in a mesh shape, 4 is a phosphor, 5 is a back electrode, and 6a and 6b. Is a container, and 7 is a leaf spring that stretches the wire cathode 1 by applying a load.

The operation of the image display device thus constructed will be described below. The line cathode 1 as an electron beam source is horizontally stretched by a leaf spring 7 attached to the supports 2a and 2b so as to generate an electron beam linearly distributed in the horizontal direction. A plurality of 1's are provided at appropriate intervals. (7 here
(Only a book is shown) This is expanded and shown in FIG. The wire cathode 1 is an insulating support 2b fixed to the back electrode 5.
It is supported by and is fixed by the leaf spring 7. In order to eliminate the variation in brightness, the distance between the line cathode 1 and the control electrode 3 and the back electrode 5 is important. Therefore, while measuring the pitch dimension and the depth dimension using an optical measuring instrument or the like, The V-groove portion 8 is processed in one place and within an error within a few μm. These wire cathodes 1 are, for example, φ1
It is constituted by coating an oxide cathode material on the surface of a tungsten wire of 0 to 20 μm.

A control pulse is controlled so that the electron beam is sequentially emitted for a certain period of time, and a heat current flows in order to raise the temperature at which the electron beam is generated at a time other than the certain period of time. Further, at the start, the control pulse for the electron beam emission and the heating current are applied to the line cathode 1 at the same timing. The back electrode 5 is a line cathode 1 that is controlled to emit an electron beam for a certain period of time.
The generation of electron beams from the other line cathodes 1 other than
And, it works to push out the generated electron beam only in the forward direction. The mesh-shaped control electrode 3 allows the electron beam to pass through a slit that is long in the horizontal direction and faces each of the line cathodes 1, and at the same time deflects the electron beam in the vertical or horizontal direction. A round hole may be used instead of the slit. The phosphors 4 are provided with one pair of phosphors of three colors R, G, and B for each electron beam divided in the horizontal direction, and are applied in stripes in the vertical direction. .. After these component parts are inserted into the divided containers 6a and 6b, they are sealed with a frit or the like to keep the internal vacuum.

[0006]

In the above-mentioned structure, the connecting terminal for supporting the wire cathode needs to be firmly fixed to the insulating support. The tension may fluctuate, which easily causes disconnection, or the position accuracy may be lost.

The present invention solves the above-mentioned problems, and provides an image display device capable of firmly fixing a connection terminal for suspending a wire cathode to an insulating support.

[0008]

[Means for Solving the Problems]

(1) In order to solve the above problems, a first invention of the present invention provides a wire cathode connection terminal in which a pair of through holes and a counterbore hole are provided in an insulating support, and a wedge-shaped claw is provided in a tip end portion. The insulating support is caulked and fixed through the through hole.

(2) In the second aspect of the present invention, the insulating support is provided with a pair of through holes and a counterbore hole at the center of the back surface between the through holes, and a wedge-shaped claw is provided at the tip. The wire cathode connection terminal is passed through the through hole and fixed to the insulating support by caulking so that the tip is located in the counterbore.

(3) According to a third aspect of the present invention, a wire cathode connecting terminal having a pair of through holes provided in the insulating support and a boss at the tip is passed through the through hole, and the boss has a back surface of the insulating support. It is fixed to the insulating support by caulking.

(4) According to a fourth aspect of the present invention, a wire having a pair of through holes and a counterbore which is continuous with the through hole in the insulating support and a dogleg-shaped bent portion at the tip end portion. The cathode connection terminal is passed through the through hole and fixed to the insulating support by caulking so that the bent portion is located in the counterbore hole.

[0012]

The operation of the first aspect of the present invention is to provide an insulating support having a pair of through holes and counterbore holes provided with a wedge-shaped claw at the tip of the connection terminal for suspending the wire cathode. By inserting the connection terminal and bending the connection terminal, the wedge-shaped claw is hard to fit into the counterbore hole, and the connection terminal and the insulating support are firmly fixed. Therefore, the tension of the wire cathode does not fluctuate, and it is possible to prevent disconnection as well as deviation of the positional accuracy.

The feature of the second invention of the present invention is that a wedge-shaped claw is provided at the tip of the connection terminal for suspending the above-mentioned wire cathode, and a pair of through holes and a counterbore are formed in the center of the back surface. By inserting and bending the connecting terminal into the provided insulating support, the wedge-shaped claws can be inserted into the through hole and the tip of the connecting terminal can be inserted into the counterbore to prevent springback. There is something you can do.
Therefore, the connection terminal and the insulating support are firmly fixed.

A feature of the operation of the third invention of the present invention is that a boss is provided at the tip of the connection terminal for extending the above-mentioned wire cathode,
The connection terminal is inserted into an insulating support provided with a pair of through holes and is bent inward, whereby the boss presses the back surface of the insulating support. Therefore, the connection terminal and the insulating support are firmly fixed.

The fourth aspect of the present invention is characterized in that the above-mentioned connecting terminal for suspending the wire cathode is provided with a dogleg-shaped bent portion, and a pair of through holes and counterbore holes are provided. By inserting the connection terminal into the insulating support and bending the connection terminal inward, it is possible to prevent the dogleg-shaped bent portion from being difficult to form the counterbore hole and prevent springback. Therefore, the connection terminal and the insulating support are firmly fixed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An image display device according to an embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a fixing structure of a wire cathode connection terminal and an insulating support of an image display device according to a first embodiment of the present invention. The insulating support 11 is provided with a pair of through holes and a countersunk hole 13 continuous to the through hole 12, and a connecting terminal 14 provided with a pair of wedge-shaped claws 15 at the tip end thereof is provided on the opposite surface of the countersink hole 13. Insert it into the through hole 12 and bend it. At that time, as shown in FIG. 3, the wedge-shaped claw 15 is provided at a position where it comes into contact with the surface of the counterbore hole 13. When the connection terminal 14 is bent, as shown in FIG. 2, bending portions are formed at the upper and lower end portions of the counterbore hole 13, and the wedge-shaped claw 15 is formed at the lower end portion of the counterbore hole 13.
A certain angle can be provided to the connection terminal 14 by the bent portion generated at the upper end portion of the counterbore hole 13 at the same time when it is pushed in, and the wedge-shaped pawl 15 is surely provided in the counterbore hole 13.
It will start Therefore, the connection terminal 1 for mounting the wire cathode
4 is firmly fixed to the insulating support 11.

A second embodiment of the present invention will be described below with reference to the drawings. 4 to 6 show a fixing structure of the wire cathode connection terminal and the insulating support of the image display device according to the second embodiment of the present invention. The insulating support 16 has a pair of through holes 17 and a counterbore hole 18 at the center of the back surface between the through holes 17, and a connecting terminal 19 provided with a wedge-shaped claw 20 at the tip end thereof. Insert it into the through hole 17 from the opposite side and bend it inward. At that time, as shown in FIG. 6, the wedge-shaped claw 20 is provided at a position where it abuts on the rear surface orthogonal to the hole surface of the through hole 17. Then, when the connecting terminal 19 is bent, as shown in FIG. 5, a bent portion is generated at the upper end of the through hole 17 and the two end portions of the counterbore hole 18, and the wedge shape is formed at the upper end of the through hole 17. When the connection terminal 19 is bent and enters the counterbore hole 18 at the same time when the claw 20 of the connection terminal 20 is pushed in, springback of the connection terminal 19 can be prevented. Therefore, the connection terminal 19 for suspending the wire cathode is firmly fixed to the insulating support 16.

A third embodiment of the present invention will be described below with reference to the drawings. 7 to 9 show the fixing structure of the wire cathode connecting terminal and the insulating support of the image display device in the third embodiment of the present invention. A pair of through holes 22 are provided in the insulating support 21, and a connection terminal 24 having a pair of bosses 25 at the tip ends is inserted and bent inward. At that time,
As shown in FIG. 9, the boss 25 is provided at a position where it abuts on the back surface of the insulating support 21. When the connection terminal 24 is bent, it bends at the upper end of the through hole 22 and presses the boss 25 against the back surface of the insulating support 21, as shown in FIG. By providing the counterbore hole 23 at the center of the back surface of the insulating support 21, the pressing force of the boss 25 against the back surface of the insulating support 21 is increased. Therefore, the connection terminal 24 that stretches the wire cathode is firmly fixed to the insulating support 21.

A fourth embodiment of the present invention will be described below with reference to the drawings. 10 to 12 show the fixing structure of the wire cathode connection terminal and the insulating support of the image display device in the fourth embodiment of the present invention. A connection terminal 2 in which a pair of through holes 27 and a counterbore hole 28 continuous to the through holes 27 are provided in the insulating support 26, and a dogleg-shaped bent portion 30 is provided at a pair of tip portions.
9 is inserted into the through hole 27 from the opposite surface of the counterbore hole 28 and bent inward. As shown in FIGS. 11 and 12, the dogleg-shaped bent portion 30 is provided at a position in contact with the surface of the counterbore hole 28. When the connection terminal 29 is bent,
As shown in FIG. 11, a bent portion is formed at two upper and lower end surfaces of the counterbore hole 28, and the bent portion 30 is bent into the surface of the counterbore hole 28 due to the refraction of the lower end portion.
A constant biting force can be provided by the refraction occurring at the upper end of 8. Therefore, the connection terminal 29 that hangs the wire cathode is firmly fixed to the insulating support 26.

In the above-mentioned embodiment, the connecting terminals are made of stainless steel such as 42-6 alloy and the insulating support is made of ceramic.

[0021]

As described above, according to the first aspect of the present invention, the wedge-shaped claw provided at the tip of the connection terminal for mounting the wire cathode is used as the through hole and the absolute support. By inserting into the counterbore hole and bending it, a wedge-shaped pawl is bitten into the counterbore hole, and the connection terminal and the insulating support are firmly fixed. Therefore, it is possible to prevent the breaking tension of the wire cathode from varying, prevent disconnection, and prevent the positional accuracy of the wire cathode from deviating.

According to the second aspect of the present invention, the wedge-shaped claw provided at the tip of the connection terminal for suspending the wire cathode is provided.
By inserting the wedge-shaped claw into the insulating support body by inserting it into a through hole provided in the insulating support body and bending it, the connecting terminal tip portion is inserted into the counterbore hole provided in the central portion of the back surface of the insulating support body. By inserting it, springback of the connection terminal can be prevented, and the connection terminal and the insulating support are firmly fixed. The tension of wire cathode extension and the positional accuracy are the same as the effects obtained by the first aspect of the present invention.

According to the third aspect of the present invention, the boss provided at the tip of the connection terminal for suspending the wire cathode is inserted into the through hole provided in the insulating support, and the boss is bent. The boss can press the back surface of the insulating support, so that the connection terminal and the insulating support are firmly fixed. The tension and the positional accuracy of the wire cathode are similar to those of the first aspect of the present invention.

Further, according to the fourth aspect of the present invention, the dogleg-shaped bent portion provided at the tip of the connection terminal for mounting the wire cathode is provided in the through hole and the counterbore provided in the insulating support. By inserting and bending, the dogleg-shaped bent portion can be inserted into the counterbore, and the connection terminal and the insulating support are firmly fixed. The tension of tension and the positional accuracy of the wire cathode are similar to the effects obtained by the first invention of the present invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fixing structure of a wire cathode connection terminal and an insulating support of an image display device according to a first embodiment of the present invention.

FIG. 2 is a sectional plan view of FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a perspective view showing a fixing structure of a wire cathode connecting terminal and an insulating support in a second embodiment of the present invention.

5 is a cross-sectional plan view of FIG.

6 is a front view of FIG.

FIG. 7 is a perspective view showing a fixing structure of a wire cathode connecting terminal and an insulating support in a third embodiment of the present invention.

FIG. 8 is a sectional plan view of FIG.

9 is a front view of FIG.

FIG. 10 is a perspective view showing a fixing structure of a wire cathode connection terminal and an insulating support in a fourth embodiment of the present invention.

11 is a sectional plan view of FIG.

FIG. 12 is a front view of FIG.

FIG. 13 is a partially cutaway perspective view showing a conventional image display device.

FIG. 14 is an enlarged cross-sectional view of its main part.

[Explanation of symbols]

 11 Insulation Support 12 Through Hole 13 Counterbore 14 Connection Terminal 15 Wedge Claw 16 Insulation Support 17 Through Hole 18 Counterbore 19 Connection Terminal 20 Wedge Claw 21 Insulation Support 22 Through Hole 24 Connection Terminal 25 Boss 26 Insulating support 27 Through hole 28 Counterbore hole 29 Connection terminal 30 V-shaped bent portion

Claims (4)

[Claims] 1. A linear cathode that emits electrons, a control electrode that controls the flow of electrons, a phosphor that can emit light by receiving the electrons, and a back electrode that is provided to emit the electrons from the linear cathode. In the image display device having the above-mentioned, an insulating support having a groove portion for guiding the line cathode is arranged at both ends, and a pair of through holes and counterbore holes are provided in the insulating support, and a wedge-shaped nail is provided at a tip end portion. The wire cathode connection terminal provided with
An image display device, characterized in that it is fixed to the insulating support by caulking through the through hole. 2. A wire cathode connecting terminal having a pair of through holes in an insulating support, a counterbore hole in the center of the back surface between the pair of through holes, and a wedge-shaped claw at the tip. 2. The image display device according to claim 1, wherein the through hole is fixed to the insulating support by caulking so that the tip of the through hole is located in the counterbore. 3. A pair of through holes are provided in the insulating support, and wire cathode connecting terminals having bosses at both ends are passed through the through holes so that the boss contacts the back surface of the insulating support. The image display apparatus according to claim 1, wherein the image is fixed by crimping. 4. A wire cathode connecting terminal having a pair of through holes and a counterbore hole continuous to the through hole in the insulating support, and a bent portion having a V-shape at both ends thereof is passed through the through hole. The image display device according to claim 1, wherein the bent portion is fixed to the insulating support by caulking so that the bent portion is located in the counterbore.