JPH01255139A - Electrode structure of display device - Google Patents

Abstract

PURPOSE:To enhance the relative locational accuracy of laminated electrodes with one another and the relative positional accuracy of the laminated electrodes with the fluorescent screen by furnishing a detent part to restrict the locational relationship of spacers with one another, and providing a locating means for restriction of the electrode location. CONSTITUTION:Some or all of the spacers are furnished with a detent to restrict the locational relationship of the spacers one another and a locating means to restrict the electrode location. When the electrodes and spacers are laminated from the region from the spacer 7 to the accelerating electrode 16, the spacers one another are located relatively by locational pins and locational holes. A horizontal convergence electrode 8 is a single flat plate and has a long hole stretching in the vertical direction corresponding to a hole 5a in a vertical selection electrode 5. A horizontal selection electrode 10 and a horizontal photo- deflecting electrode 12 are detained with a locational groove formed in the spacers 9, 11, 13, and their pitch is aligned in precision. This ensures relative locational accuracy of a plurality of electrodes, and a number of electrodes can be located precisely relative to the fluorescent screen of the face plate.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to display devices (display devices used for image or video display, vehicle-mounted Display devices, display devices used as optical printer heads, display devices that are combined to form one large screen display device, etc.), and in particular, electrodes of display devices that have internal electrodes with a structure in which multiple electrodes are laminated. It's about structure.

[Prior Art] Conventionally, display devices for displaying images or videos generally use cathode ray tubes. This cathode ray tube type display device generates an electron beam using one or more electron guns, scans the electron beam onto a screen coated with phosphor, and projects the electrons at high speed to create a display. It is something to do.

Therefore, it is possible to use a phosphor that is excited by a high-speed electron beam, and it is easy to create a color display, and it is also possible to obtain a highly detailed display with high brightness.

On the other hand, in cathode ray tube display devices, an Iπ electron gun is placed behind the display surface, and a considerable depth is required to scan the electron beam to both ends of the screen, making it thinner or lighter. This was extremely difficult.

Therefore, in recent years, color technology has been developed in which a high voltage is applied to the phosphor screen portion covered with phosphor, similar to a cathode ray tube, and the addressing of the light emitting portion is performed using various electrode groups such as position selection electrodes and deflection electrodes. Image display devices began to be developed. This type of image display device can achieve almost the same brightness and resolution as a cathode ray tube, and is thinner in depth. FIG. 4 shows such an image display device, and is a sectional view showing an example of the electrode structure inside the envelope. In this figure, 101 is a shield electrode, 102 is a horizontal selection electrode, 103 is a horizontal deflection 'It rod, 104 is a protection electrode, and 10
5 is an accelerating electrode, and various stiff electrodes are insulating spacers 106, 107 made of glass material or insulating paste, etc.
The shield electrodes 101 are laminated and fixed at 108 degrees and 109 degrees, and an insulating spacer 111 having a vertical deflection electrode 110 formed on the side surface thereof is fixed to the shield electrode 101 to form an integrated electrode stack. Further, on the inner surface of the back plate 112, a filament-shaped shade J4113, a vertical focusing electrode 114, and a vertical selection Ti1115 are provided, and on the inner surface of the face plate 116, a phosphor screen portion 117 is formed. The electrode stack is arranged and fixed between the phosphor screen portion 117 of the face plate 116 and the vertical selection electrode 115 on the back plate 112 side.

To explain in more detail, the shielding electrode 101 is formed from a single metal plate, and has openings formed in the horizontal selection electrode 102 and the vertical selection electrode 115, which will be described later, at positions corresponding to openings.
A long hole is formed in the vertical direction (direction perpendicular to the direction in which the cathode 113 is stretched). Further, the horizontal selection electrode 102 is
A long hole is formed at a position corresponding to the long hole of the vertical selection electrode 115 with a linear electrode extending in the vertical direction corresponding to one to several pixels in the horizontal direction. Furthermore, the horizontal deflection electrode 103 is formed by a large number of linear electrodes extending in the vertical direction. The protective electrode 104 is formed from a single metal plate, and mesh-like or grid-like openings are formed at positions corresponding to the phosphor screen portions 117. On the other hand, the vertical focusing electrode 114 is formed across the back plate 112 and the spacer member 118, and is disposed corresponding to each cathode 113. Furthermore, like the vertical focusing electrode 114, the vertical selection electrode 115 is disposed corresponding to each negative bar 113, and has a hole at a position corresponding to the elongated hole formed in the shielding electrode 101 and the horizontal selection electrode 102 described above. or is formed. In addition, in the phosphor screen section 117, phosphor layers of a desired luminescent color are arranged extending in the vertical direction, and black masks are arranged between each phosphor layer and between each pixel to improve display contrast. I try to let them do it. Furthermore, a metal back layer is provided on the cathode type side, and a high voltage is applied to this metal back layer. Note that the accelerating electrode 105 is formed of a metal plate, is held at the same potential as the metal back layer, and is connected to the back plate 112 by other electrodes and spacer members.
Also, the face plate 116 is supported from the inside.

With the above configuration, electrons emitted from the cathode 113 are directed to the vertical focusing electrode 114 and the vertical selection electrode 11.
5 forms an electron beam whose vertical position is selected. The electron beam is deflected by applying different deflection voltages to the vertical deflection electrodes 110, 110 facing each other with the electron beam in between, thereby selecting a pixel in the vertical direction. Further, the electron beam is further focused by a horizontal focusing electrode 101, and a horizontal selection electrode 102 and a horizontal deflection electrode 103 select a pixel in the horizontal direction and a phosphor layer within the pixel. The electrons then strike the phosphor layer at high speed to produce a desired display.

In addition, like display devices (light-emitting cells) that form large-screen display devices, pixels are arranged in every corner of the display device to produce a highly rusty and fine display when combined, and high-voltage fluorescent cells are used. In order to obtain high brightness by applying electrons to the body screen portion at high speed, the number of internal electrodes increases. Accordingly, in some cases, insulating spacer members are interposed between the electrodes in order to maintain the electrodes at a predetermined distance, and the 'Po rods are stacked and arranged.

Furthermore, in display devices used as onboard display devices or optical printer heads, internal electrodes are increased in order to increase brightness, expand the display area relative to external dimensions, or reduce brightness variations. There is also one in which electrodes are stacked and arranged with an insulating spacer member interposed therebetween.

[Problems to be Solved by the Invention] As mentioned above, in conventional display devices, a plurality of electrodes are stacked in an envelope via a plurality of insulating spacer members, but each electrode has a special purpose. It is difficult to assemble a plurality of functional electrodes with relative positional accuracy, and it is also difficult to accurately position a large number of stacked electrodes with respect to the phosphor screen of the face plate. There was a problem. Also, Fig. 4(a)
, (b), for example, the horizontal selection electrode 102
The horizontal deflection type #Jfi103 is an electrode group consisting of multiple linear electrodes, and each linear electrode itself has low mechanical strength and easily deforms, so it is difficult to mount it on each spacer member or There was a problem in that the pitch between the linear electrodes varied during the process of sealing them into the envelope. Regarding an electrode group consisting of a large number of linear electrodes, if the electrode group is mounted and sealed on a spacer member under tension during assembly, the pitch problem can be improved to some extent, but it cannot be said to be perfect. In addition, when the size of =i becomes large, the minute difference in thermal expansion coefficient between the envelope or spacer member and the electrode can no longer be ignored, and in addition, the electrode must be placed under tension. Therefore, there was a problem in that the envelope or the spacer member was easily damaged.

The present invention has been made in view of the above problems, and it is possible to ensure the pitch accuracy of the linear electrodes when the electrode group includes linear electrodes, and to improve the relative position granularity between the stacked electrodes. It is an object of the present invention to provide an electrode structure for a display device that has high relative positional accuracy with a phosphor screen.

[Means for Solving the Problems] In the electrode structure of the display device according to the present invention, a plurality of electrodes including an electrode group consisting of a plurality of linear electrodes are stacked and arranged via a plurality of insulating spacer members. The electrode structure of the display device is characterized in that some or all of the spacer members are provided with an engaging portion that regulates the mutual positional relationship of the spacer members, and a positioning means that regulates the position of the electrode.

In the Rη electrode structure, the engaging portion may be formed of a positioning hole provided in the negative spacer member and a positioning pin provided in the other spacer member and fitted into the positioning hole.

Further, in the electrode structure, the positioning means formed on the spacer member may be constituted by a positioning groove into which each linear 1E rod of the mandrel group is inserted and guided.

Further, in the electrode structure, a protrusion for locking the linear electrode may be provided inside one of the positioning grooves.

[Function] When assembling the display device with the electrode structure according to the present invention, the positional relationship between the spacer members is regulated by the retaining portion provided on the spacer member, and the positioning portion of the electrode is furthermore Since the positional relationship with respect to the spacer member is regulated, assembly accuracy of the laminated structure composed of the electrode and the spacer member is ensured.

In particular, if the positioning means is a positioning groove formed in a spacer member, in an electrode group composed of a plurality of linear electrodes, each linear electrode is reliably held by the valley groove, so the pitch accuracy is high. Retained. Furthermore, if a protrusion is provided in this positioning groove to lock the first linear electrode, the linear electrode will be less likely to be damaged even during heating and expansion.

[Example] An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIGS. 1(a) and 1(b) are cross-sectional views showing the electrode structure of the image display device according to this embodiment. As shown in the figure, inside the envelope? ``The rods are, from the back plate l side, back electrode 2, cathode 3, vertical selection electrode 5, vertical deflection electrode 6, horizontal focusing electrode 8, horizontal selection type Vilo, horizontal deflection type rod 12, protection electrode 14, acceleration type rod. 16, and the phosphor screen part a which becomes the anode electrode are arranged in parallel in this order, and between the back plate 1 and the acceleration electrode 16, there is a spacer member 4.7.
．． 9.11.13.15 are arranged. That is, this image display device has a back plate 1 and a face plate 1.
7, various electrodes and spacer members are supported as an integrated structure.

Next, the shape of each electrode and the laminated state with each spacer member will be explained.

The cathode 3 has a filament shape that is long in the horizontal direction, and a large number of cathodes are arranged in the vertical direction. It emits electrons by heating it with electricity. A back electrode 2 is provided on the inner surface of the back plate 1 and the wall surface of the spacer member 4 so as to surround the cathode 3 . Further, on the face plate 17 side of the spacer member 4, a pair of vertical selection electrodes 5 are arranged corresponding to each cathode 3. A hole 5a is formed in each vertical selection electrode 5 in a horizontal direction corresponding to each pixel P. Note that each company 5a is configured to correspond to four pixels P arranged in the vertical direction.

Furthermore, a spacer member 7 is provided below the vertical selection electrode 5, as shown in FIG. The spacer member 7 is made of an insulating material, and a vertical deflection electrode 6 is disposed on its wall surface.

Then, the electron beam is deflected by applying different voltages to the vertical deflection electrodes 6 facing each other across the space,
For example, one of four pixels arranged in the vertical direction is selected. Further, the spacer member 7 is integrally formed in the shape of a frame, and a positioning hole 7a is formed in the frame portion, which serves as an engagement portion between the spacer members and a means for positioning the electrode.

Further, the horizontal focusing electrode 8 is formed of a single flat plate, and has a long hole 8a formed in the vertical direction corresponding to the hole 5a of the vertical selection electrode 5. Furthermore, a positioning hole 8b corresponding to the positioning hole 7a is formed.

On the other hand, a pair of spacer members 9 below the horizontal focusing electrode 8 are formed in a frame shape, and a positioning pin 9b is formed on the upper surface of the spacer member 9, which serves as an engaging portion between the spacer members and a means for positioning the electrode. has been done. That is, when the spacer member 7, the horizontal focusing electrode 8, and the spacer member 9 are stacked, the pin 9b engages with the positioning holes 7a and 8b, so that the spacer member 7, the horizontal focusing electrode 8, and the spacer member 9 are placed relative to each other. is positioned. Furthermore, spacer member 9
A positioning pad 9a for engaging with the horizontal selection electrodes 10, which are a plurality of linear electrodes, is formed on the lower surface of the
A positioning hole 9c serving as the engaging portion is formed in the frame portion.

Further, below the spacer member 9, a horizontal selection electrode 10 is arranged. The horizontal selection type J41O is a linear electrode arranged corresponding to each pixel P arranged in the horizontal direction, and has a long hole 10a that is long in the vertical direction. When assembled, this horizontal selection electrode 10 is formed into an integrated electrode group 10' by the frame, and after assembly, unnecessary portions are cut off. Furthermore, a positioning hole 10b is formed in the frame as a means for positioning the electrode.

Further, a spacer member 11 is provided below the horizontal selection electrode 10. Positioning grooves 11a and iib, which engage with the horizontal selection electrode 10 and the vertical deflection electrode 12, are formed on both upper and lower surfaces of the spacer member 11, respectively. Furthermore, the spacer member 11 is integrally formed in a frame shape,
Positioning bins llc as the engaging portions are provided on both sides of the frame portion.
, lid are provided. That is, when assembled, the positioning pin llc is aligned with the positioning hole 9 of the spacer member 9.
C, and the positioning pin ttct is a positioning hole 13b as an engaging part of a spacer member 13.15, which will be described later.
15c.

Water Pi: The deflection electrode 12 is a linear electrode that is integrally formed into a frame shape, forming an electrode group 12'. After assembling, unnecessary parts of the frame are cut off. In addition, on both sides of the frame part, there are protrusions t2a and 1 as seven steps for positioning the electrodes.
2b is formed.

These protrusions 12a, 12b are connected to the electrode group 10' and the protection M4.
The horizontal selection electrode 1 engages with positioning holes 10b and 14e as positioning means provided in the Vfil 4 respectively
0, the relative positioning of the horizontal deflection electrode 12 and the protection electrode 14 is performed. Next, the spacer member 13 is integrally formed into a frame shape, and a horizontal deflection electrode 1 is provided on the upper surface of the spacer member 13.
A positioning groove t3a that engages with 2 is formed. Further, a positioning hole 13b serving as an engaging portion and a positioning hole 13c serving as both an engaging portion and a positioning means are formed in the frame portion. The protective electrode structure 4 is formed of a single plate, and has a grid-like or mesh-like opening 14a at a position corresponding to the cathode 3, and positioning holes 14b and 14c are formed at the ends thereof. ing.

The spacer member 15 is integrally formed in a frame shape, and has a positioning pin 15a which is engaged with the positioning hole 14b of the protective electrode 14 and also serves as a positioning pin 15a which is engaged with the positioning hole 13e of the spacer member 13.

Further, there are a positioning hole 15c as an engaging part that engages with the positioning pin 11d of the spacer member 11, and a positioning pin 15b as an engaging part on the lower surface.

Further, reference numeral 16 denotes an accelerating electrode made of a conductive material such as a metal material. A positioning hole 16a serving as an engaging portion that engages with the positioning pin 15b of the spacer member 15 is formed in the frame portion.

Here, when the waste electrodes and each spacer member from the spacer member 7 to the accelerating electrode 16 are stacked, the spacer members have positioning bins as engaging parts and positioning holes as engaging parts formed separately. are positioned relative to each other.

In contrast, each electrode, for example the horizontal focusing electrode 8, is positioned on the spacer member 9 with its positioning hole 8b engaging with a positioning pin 9b of the spacer member 9. Further, the protective electrode 14 and the accelerating electrode 16 are connected to the respective positioning holes 1
4b and 16a are positioning bins 15 for the spacer member 15.
a, 15b, and both electrodes are positioned with respect to the spacer member 15. Further, the horizontal deflection electrode has its positioning pin 12b engaged with the positioning hole 14c of the protective electrode 14, and furthermore, the positioning pin 12a is engaged with the positioning hole 10b of the horizontal selection electrode 10, so that the positioning pin 12b is engaged with the positioning hole 10b of the horizontal selection electrode 10. Since the horizontal selection electrode 10 and the horizontal deflection electrode 12 are positioned, and the protection electrode 14 is positioned on the spacer member 5, each electrode and each spacer member are positioned relative to each other.

Further, the horizontal selection electrode 10 and the water deflection electrode 12 are connected to the positioning 7 formed on the spacer member 9.11.13.
It engages with the positioning grooves 98.11b, lla, and 13a as steps, and the pitches thereof are arranged in a rust-tight manner.

After assembling each electrode and spacer member, if the stiffness is fixed with an adhesive such as frit glass, the spacer member 7
The electrodes and spacer member from the to the accelerating electrode 16 can be integrated and handled as one unit. Further, a phosphor screen portion a is formed on the face plate 17 in advance, and the back electrode 2, the cathode 3, the spacer member 4, and the vertical selection electrode 5 are integrated with the back plate 1, and the intermediate spacer member and By positioning the unit that integrates the 'Iπ poles with respect to these, the relative positioning of all electrodes and spacer members can be performed.

Furthermore, if a photosensitive material having insulating properties such as photosensitive glass is used for the spacer member, finer processing becomes possible using etching technology. In addition, some photosensitive glasses have self-bonding properties, and when heat-treated in a laminated state, they crystallize and become integrated, so if such materials are used for spacer members, Each spacer member and each electrode can be integrated into a unit without using adhesive materials, which simplifies the assembly process and eliminates the disadvantages of using adhesive materials (for example, dust caused by adhesive materials, etc.)
(Effects of decomposition products of adhesive materials, etc.) do not occur.

Furthermore, when assembled as a display device, if the unit is disposed between the face plate 17 and the back plate 10 without any gaps and the atmospheric pressure applied to the envelope is supported by the spacer member and the electrodes, it is possible to easily assemble the unit. As long as care is taken in handling, there is no particular need to fix the spacer member and the electrode.

Note that the positioning from the spacer member 7 to the accelerating electrode 16 may be performed by using positioning pins for positioning each spacer member.

However, when each electrode is composed of independent wire-shaped linear electrodes, such as the horizontal selection electrode group 10° and the horizontal deflection electrode group 12°, the electrodes are directly positioned on the spacer members 9, 11, and 13. Since it is difficult to do so because of the spacer, keep that frame part and i! It is better to use other electrodes such as the electrode 14 for positioning.

Furthermore, in this embodiment, the positioning grooves that determine the arrangement pitch of the horizontal selection type 8i10 and the horizontal deflection electrode 12 are provided in both adjacent spacer members, and thereby the linear electrodes are sandwiched and fixed from above and below. Alternatively, a groove deeper than the thickness of the electrode may be formed in only one spacer member.

According to the embodiments described above, in the electrode structure of a display device consisting of a stacked body of a plurality of electrodes and a plurality of spacer members, the spacer members are mutually positioned by positioning pins, positioning holes, etc. as engaging parts. Further, the electrodes are positioned with respect to each other using pins, protrusions, holes, etc. as positioning means provided on the spacer member or the electrodes themselves. Furthermore, a linear electrode such as the horizontal selection electrode 10 is positioned by a positioning groove provided in the spacer member. Therefore, with this structure, multiple electrodes can be assembled with sufficient relative positional accuracy, and 73% of the roughly stacked electrodes can be assembled into a face plate! It can be accurately positioned with respect to the phosphor screen a of No. 7.

Further, for linear electrodes, a rust-tight pitch can be easily obtained.

Next, as shown in FIG. 3, the spacer member 9.13
Protrusions 20 are provided in the positioning pads 9a and 13a, respectively, and corresponding holes are provided in the linear electrodes inserted into the wire electrodes 9a and 13a.
, 13a and a plurality of protrusions 20 may be used to fix each linear electrode. In this way, positioning complete 9a, 1
After a heating process such as sealing between the linear electrode inserted in the spacer member 9.13 and the linear electrode inserted into the spacer member 9.13, the strain caused by the difference in coefficient of thermal expansion is dispersed in each section divided by the plurality of protrusions 20. , the front claws applied to the spacer members 9.13 located at both ends are reduced, and the spacer members 9.13 may be damaged, and the envelope of the display device etc. may be damaged accordingly.
≦ becomes. Therefore, such a structure is particularly useful in large display devices where the difference in thermal expansion between the metal and the spacer member or envelope is a problem.

[Effects of the Invention] According to the electrode structure of a display device according to the present invention, a display device in which a plurality of electrodes including an electrode group consisting of a plurality of linear electrodes are stacked and arranged via a plurality of insulating spacer members. In this electrode structure, since an engaging portion that regulates the mutual positional relationship of the spacer members and a positioning means that regulates the position of the electrode are provided, the relative positional accuracy between the stacked electrodes and the stacked electrodes are improved. This has the effect of improving relative positional accuracy with the phosphor screen. Furthermore, if positioning grooves are formed in the spacer member as the positioning means, the pitches of the many linear electrodes can be kept close.

[Brief explanation of the drawing]

FIG. 1(a) is a sectional view taken along the line A-A in FIG. is B in the same figure (a)
FIG. 2 is an exploded perspective view showing the electrode structure of the display device; FIG. FIG. 4 is a perspective view of a spacer member that forms a protrusion 4r, and FIG. 4 is a sectional view showing the electrode structure of a conventional image display device, in which FIG. 4(a) is a horizontally cut view, and FIG. 4(b)
is a vertical section. 4.7, 9, 11, 13.15 - Spacer member, 10-... Horizontal selection electrode as a linear electrode, 12-...
Horizontal deflection electrode group as linear electrodes, 10°--horizontal selection electrode group ('electrode group), 12'--horizontal deflection electrode group (
electrode group), 7a, 13b... positioning hole serving as an engaging part and positioning means, 9b, 15a - positioning pin serving as an engaging part and positioning means, 8b, 10b, 14c, 14b... positioning means positioning hole as, 12a, 12
b...Protrusion as the first stage of positioning, 9e, f3c, 1
5c, 16a - Positioning hole as an engaging part, tic, lid, 15b - Positioning pin as an engaging part, 9a, 11 a, 1 l b, 13a - Positioning groove, 2
0 ... Protrusion patent applicant Futaba Electronics Co., Ltd. Agent/patent attorney Norimitsu Nishimura @1 Figure (a) B→ Figure 1 (b) A→ 14 Figure (a), 112 4th Ward ( b) Shi◇◇Uotsuotsu2///Nni-kaku”

Claims (1)

[Claims] 1. In an electrode structure of a display device in which a plurality of electrodes including an electrode group consisting of a plurality of linear electrodes are stacked via a plurality of insulating spacer members, some or all of the 1. An electrode structure for a display device, characterized in that a spacer member is provided with an engaging portion for regulating the mutual positional relationship of the spacer members, and a positioning means for regulating the position of the electrode. 2. The electrode structure of a display device according to claim 1, wherein the engaging portion comprises a positioning hole provided in one spacer member and a positioning pin provided in the other spacer member and fitted into the positioning hole. 3. The electrode structure for a display device according to claim 1, wherein the positioning means is a positioning groove into which each linear electrode of the electrode group is inserted and guided.