JPS60235333A - Electrode frame body - Google Patents

Abstract

PURPOSE:To obtain an electron frame body with exceedingly good flatness that can maintain high accuracy by integrating a core and an electrode so that a noncontact section can be shared partly and compression force and tensile force can be applied to the core and the electrode, respectively. CONSTITUTION:The spacing of the core longer direction of the support hole 44 of an electrode thin plate 43 is shorter by approximately 100mum than the spacing of the core longer direction of a stopper pin 42. The electrode thin plate 43 is heated by an electric furnace and such and the spacing of the core longer direction of the support hole 44 is prolonged by several 100mum by pulling both ends using a stopper jig and such. On the other hand, a core 41 is held at room temperatures and the electrode thin plate 43 is inserted instantaneously in the ejector return pin 42 of the core 41 and then the electrode thin plate 43 is returned gradually to the room temperatures. As a result, since the electrode thin plate 43 is tightened, an electrode frame body with exceedingly good flatness can be obtained. If the difference in thermal expansion coefficient is used, the process can be simplified exceedingly without considering prevention of a sudden change in temperatures, etc.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an electrode structure for a display device.

Conventional Structure and Problems First, an example of the basic structure of the image display element used here will be described with reference to FIG. This display element is arranged in order from the rear to the front: back 1! tM (11, line cathode (2) as beam source, vertical focusing electrode (3) (8'),
Vertical deflection electrode (4), beam flow control electrode (5), horizontal focusing electrode (6), horizontal deflection electrode (7), beam acceleration north pole (
8) and a screen plate (9), which are housed inside a flat glass bulb (not shown) that is evacuated. Here, a vertical focusing electrode (3) is used as an electron beam extraction means, a beam flow control electrode (5) is used as an electron beam control means, vertical and horizontal deflection electrodes (4) (7) are used as an electron beam deflection means, and a screen plate is used as a light emitting means. (9) correspond to each other.

A line cathode (2) serving as a beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction, and a plurality of line cathodes (2) are arranged vertically at appropriate intervals. Books (four books (2a) to (2d) are shown here) are provided. In this embodiment, it is assumed that 15 pieces are provided, which are denoted by (2a) to (2o). These wire cathodes (2) are constructed by coating a oxide cathode material on the surface of a 10 to 20 μm thick tungsten wire, for example. Then, as will be described later, the electron beams are controlled to be emitted sequentially from the upper line cathode (2a) for a fixed period of time. At this time, the back electrode (1) suppresses generation of electron beams from line cathodes (2) other than the line cathode (2) that is controlled to emit electron beams for a certain period of time, and
It functions to push out the generated electron beam only in the forward direction.

This back electrode (1) may be formed by a coating of electrically conductive material applied to the inner surface of the rear wall of the glass bulb.

Moreover, a planar electron beam emitting cathode may be used instead of the back electrode ( ) and the line cathode (2).

The vertical focusing electrode (3) is a conductive plate αυ having a horizontally long slit OQ facing each of the line cathodes (2a) to (2o), and directs the electron beam emitted from the line cathode (2) through the slit αQ. and vertically focused. The slit α1 may be provided with crosspieces at appropriate intervals in the middle, or may be a row of through holes arranged horizontally at small intervals (nearly touching intervals), and is essentially a slit. It may be configured as The vertical focusing electrode (8') is similar.

A plurality of vertical deflection electrodes (4) are arranged horizontally at intermediate positions of the slits 00, and conductors (13 (
18'). and,
A vertical deflection voltage is applied between the opposing conductors (13 (1g') to deflect the electron beam in the vertical direction. In this embodiment, the pair of conductors (13 (18')
The electron beam from the book line cathode (2) is vertically deflected to a position corresponding to 16 lines. The 16 vertical deflection electrodes (4) constitute 15 conductor pairs corresponding to each of the 15 line cathodes (2), resulting in 240 horizontal lines on the screen (9). Deflect the electron beam so that it draws

Next, the control electrodes (5) each consist of a conductive plate σO having a vertically long slit αΦ, and a plurality of control electrodes (5) are arranged in parallel in the horizontal direction at a predetermined interval.

In this example, 820 control electrode conductive plates (15-1
) to (15-n) are provided (only 10 trees are shown in the figure). Each of the control electrodes (5) divides the electron beam horizontally into one pixel and extracts it.
And the amount of passage thereof is controlled according to the video signal for displaying each picture element. Therefore, the control electrode (5) is
If 0.020 pixels are provided, 320 picture elements can be displayed per horizontal line. In addition, in order to display images in color, each picture element is displayed using phosphors in eight colors: R, G, and B.
The R, G, and B video signals are sequentially applied to each control electrode (5).

In addition, the 820 control electrodes (5) have 32
0 sets of video signals are applied simultaneously, and one line of video is displayed at one time.

The horizontal focusing electrode (6) has a plurality of 320 long slits in the vertical direction facing the slit α of the control electrode (5).
The electron beam is composed of a conductive plate ση having a conductive plate, and the electron beam for each picture element divided horizontally is focused in the horizontal direction into a narrow electron beam.

A plurality of horizontal deflection electrodes (7) are conductive plates 08 arranged vertically at intermediate positions between the slits αQ.
A horizontal deflection voltage is applied between each of them to deflect the electron beam for each picture element in the horizontal direction, and sequentially irradiate each of the R9G and B phosphors on the screen (9). to make it emit light. The deflection range is
In this embodiment, each electron beam has a width of one picture element.

The accelerating electrode (8) is composed of a plurality of conductive plates 01 installed horizontally at the same position as the vertical deflection wt pole (4), and allows the electron beam to collide with the screen (9) with sufficient energy. Accelerate as if

The screen (9) is constructed by applying a phosphor 4 that emits light when irradiated with an electron beam to the back surface of a glass plate η, and adding a metal back layer (not shown). The phosphor (E) is placed in one slit Q4 of the control electrode (5).
1, that is, for each horizontally divided electron beam, one pair of eight-color phosphors, R, G, and H, are provided and applied in stripes in the vertical direction. has been done. In FIG. 1, the broken lines drawn on the screen (9) indicate vertical divisions displayed corresponding to the plurality of line cathodes (2), and the two-dot chain lines indicate the divisions in the vertical direction that are displayed corresponding to the plurality of line cathodes (2). ) shows the horizontal divisions displayed corresponding to each of them. In one section divided by these two,
As shown in an enlarged view in FIG. 2, there are R, G, and B phosphors for one picture element in the horizontal direction, and a width for 16 lines in the vertical direction. The size of one section is, for example, IMM in the horizontal direction and 16ff in the vertical direction.

Note that in FIG. 1, the length in the horizontal direction is greatly enlarged relative to the length in the vertical direction for clarity.

In addition, in this embodiment, one control electrode (5), i.e. one
R, G, and B phosphors (A) are 1 for the electron beam of the book.
Only one pair for each picture element is provided, but two pairs for more than two picture elements are provided.
Of course, more than one pair may be provided, and in that case, R, G, and B video signals for two or more picture elements are sequentially applied to the control electrode (5), and horizontal deflection is performed in synchronization with the R, G, and B video signals for two or more picture elements. Ru.

The vertical deflection electrode (4) or beam acceleration electrode (8) of the image display element is usually formed by adhering a conductive film on an insulating substrate (for example, a glass plate), or by using a metal plate. form.

When a conductive film is deposited on an insulating substrate, the accuracy of the electrode, especially the plane accuracy, is determined by the accuracy of the insulating substrate. For example, if the vertical deflection electrode is formed using a glass plate, 2
00 ff
Occurs about m. Further, even if the glass plate is polished, the undulations, warpage, etc. are about 80 μm to 50 μm, and it is extremely difficult to manufacture the glass plate with higher precision and at a lower cost.

Further, when a metal plate is used, an electrode structure 0η as shown in FIG. 3 is made by adhering and fixing a thin metal plate with a frit glass material or the like. This is because the thin metal plates are stacked one on top of the other, so they shift slightly during the assembly process, and when the frits are bonded and fixed, a shift of about 50 μm to 100 μm occurs. Alternatively, a rectangular parallelepiped metal formed by extrusion molding or processing such as grinding may be used, and the longitudinal side surfaces may be used as electrodes. In this case as well, there was a problem in that it was extremely difficult to manufacture the device with higher precision and at a lower cost.

On the other hand, in the configuration shown in FIG. 1, the influence of undulations, warpage, etc. of the vertical deflection electrode causes the landing of the electron beam to be 2.0% on the surface of the light emitting means coated with the phosphor.
The display will be enlarged by ~2.5 times, and the seam between the area displayed by any single line cathode and the area displayed by the adjacent line cathode will have a very large effect on image quality. give. For example, in the case of a TV about 10" in size, if the seams are separated by about 30 μm or overlap, it may be difficult to even slightly recognize that a straight line has been drawn. , if the seam is 25 μm or less, it is hardly recognized.However, if the seam is 40 μm or more, it is clearly recognized.

From the above, when the vertical deflection electrode has a length of 200 μm in the longitudinal direction, it is formed with a flatness accuracy of about 30 μm to 100 μm, so that the landing of the electron beam on the light emitting means surface is 2 μm to 100 μm. Magnified 2.5 times, 60 μm ~
The electron beam landing accuracy is 250 μm. Therefore, the seam is 30 μm or more, and a horizontal straight line is clearly recognized, which has the disadvantage of deteriorating the image quality.

Purpose of the Invention The purpose of the present invention is to provide a core material and an electrode disposed on the core material having a part of the non-contact portion with each other, and to be integrated with each other by exerting tensile force or compressive force on their own. The object of the present invention is to solve the above-mentioned problems and provide a more expensive and highly accurate electrode structure.

Structure of the Invention In order to achieve the above-mentioned object, the present invention includes a core material and a plate-shaped or rod-shaped electrode arranged with two or more fixing parts on the side surface of the core material. Material and the above 11! It shares a non-contact part with the pole, and is integrated in such a way that compressive force is applied to the core material and tensile force is applied to the electrodes.
This has the effect of providing extremely good flatness and maintaining high accuracy.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Fourth
In Figures (a) and (b), the core material 0η is made of stainless steel, and the size is 220 + uX 6 tmX 4 zt
pt, but the thickness of the middle part excluding both ends is 8.5
It is pm. (Foundation) is a ceramic locking pin fitted into a core material θD at both ends, and is a round bar with a diameter of about 0.5 to 2.0. The distance in the longitudinal direction of the core material of this stopper bottle @4 is 21
5. The distance from the stop pin (6) to the end is about 5 inches. □ is an electrode made of the same stainless steel material as the core material, made of a thin plate with a thickness of 50 μm, and arranged almost symmetrically on both sides of the core material 0υ. 2) is an insertion hole for a stopper (c) provided in the electrode thin plate, and is also a hole through which tension is maintained when the electrode thin plate is stretched across the left and right stopper pins ii3. ■ is a striped array of holes. When the thin electrode plate is supported at two points (on the stopper) and tension is applied unevenly to the thin electrode plate, distortion such as twisting will occur. This prevents the tension from being applied evenly to the thin electrode plate. into the support hole),
The porous rows (■) are all made by etching. In order to apply tension to the electrode back plate, the spacing of the support holes in the longitudinal direction of the core material is approximately 1 larger than the spacing of the pins (6) in the longitudinal direction of the core material.
The length is shortened by about 0.00 μm, and it is said that when inserting the pin (into the pin) into the support hole (b) at room temperature, it will not be able to be inserted.

Therefore, when a thin electrode plate (goods) is heated to about 800℃ in an electric furnace or the like and both ends are pulled with a stop jig, etc., the longitudinal direction of the core material in the support hole (goods) is The interval is increased by several hundred ltm, while the core material (■) is kept at room temperature, and the electrode thin plate is instantaneously inserted into the stopper mechanism of the core material (2).Then, the electrode thin plate is slowly returned to room temperature. . Since the distance in the longitudinal direction of the core material between the support holes of the original thin electrode plate is about 100 μm shorter than that of the retaining pin ring, the electrode thin plate itself is subjected to tensile force by the retaining pin of the core material t4η. It turns out. On the other hand, the core materials 0] and 1 receive compressive force in the opposite manner. As a result, the electrode thin plate becomes taut, and an electrode structure having extremely good flatness of about 10 μm can be obtained. Further, since the thin plates serving as the electrodes are arranged on both sides of the core material in a substantially symmetrical manner, there is no distortion of the core material, resulting in a highly accurate electrode.

As an example, when the core material Oη is 86%N+ Fes electrode thin plate (foundation) and 50% Ni-Fe is used, the thermal expansion curves of the core material and electrode thin plate are shown in curves A and B in Fig. 5. Due to the difference in thermal expansion coefficient, the electrode thin plate (
It becomes possible to insert Therefore, when the core material is maintained at room temperature as described above, one electrode thin plate is heated to a high temperature, and the electrode thin plate is taken out instantly and inserted into the core material retaining pin with precision to prevent a sudden drop in temperature, the high temperature of the electrode thin plate is required. It is necessary to consider the jig etc. to hold the electrode, which requires a large amount of equipment investment from the viewpoint of accuracy and prevention of sudden changes in temperature, and the process is considered to be complicated and expensive. If such a difference in thermal expansion coefficients is utilized, there is no need to consider prevention of sudden changes in temperature, etc., and the process becomes extremely simple.

In addition, as another example, without using the fixing pin for the core material, the thin electrode plate is heated to about 800°C in an electric furnace, etc., and the core material is directly spot welded, etc. while pulling both ends with a fixing jig, etc. By adhering to both end portions of the electrode structure, there is no need to provide positional accuracy using the fixing pins, etc., and the electrode structure can be manufactured through an extremely simple process.

Furthermore, as an example, when ceramic or the like is used as the core material, it is difficult to use the welding described above, but it can be cured at high temperature with an adhesive such as frit glass, and as described above, it is an extremely simple process. The electrode structure can be manufactured using the following steps.

In the above embodiments, a thin metal plate was used as an electrode, but it is of course possible to use a rod-shaped electrode such as a metal wire.

Effects of the Invention According to the present invention, the core material and the electrode have some non-contact parts with each other and are integrated with each other by their own tensile or compressive force, resulting in extremely good flatness. This also has the effect of maintaining high accuracy.

Furthermore, by making the core material and the electrode have different coefficients of thermal expansion, the process can be simplified and the electrode assembly can be manufactured at extremely low cost.

Furthermore, by integrating the core material and the electrode via a welded portion or an adhesive, the process can be greatly simplified, and the electrode structure can be manufactured at extremely low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a basic configuration of a display device, Fig. 2 is an enlarged view of a screen plate of the same device, Fig. 3 is a partial perspective view of a conventional electrode structure, and Fig. 4 ( a) and (b) are a partial perspective view of an electrode structure and an enlarged perspective view of a main part showing one embodiment of the present invention, and FIG. 5 is a thermal expansion curve diagram of a material. (4)・Vertical deflection electrode, (8)・Beam acceleration electrode, (
Material)...core material, (6)...stopping pin, omitted...electrode thin plate, ■...support hole agent Yoshihiro Morimoto Fig. 2 Boika's trity Fig. 3

Claims (1)

[Claims] 1. A core material and a plate-shaped or rod-shaped electrode disposed with two or more fixing parts on the side surface of the core material, and the core material and the electrodes are different from each other. An electrode assembly that shares a part of a non-contact part and is integrated in such a manner that a compressive force is applied to the core material and a tensile force is applied to the electrodes. 2. The electrode assembly according to claim 1, wherein the core material and the electrode have different coefficients of thermal expansion. 3. The electrode assembly according to claim 1, wherein the core material and the electrode are integrated through a welded portion. 4. The electrode assembly according to claim 1, wherein the core material and the electrode are integrated through an adhesive.