JPH10214570A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display device as being capable of achieving the high brightness of a display image and accommodating the large scale of the device and the high definition of the display image. SOLUTION: In a plasma display tube filled with discharge gas, at least two memory elements 5a, 5b in the same structure which have plural through- holes formed in a matrix shape and all surfaces in effective memory areas covered with insulating layers 7a, 7b to overlap each other, plural anode electrodes 3 arranged in parallel and plural cathode electrodes 4 arranged in parallel to be perpendicular to the anode electrodes 3 are provided. In plural communication parts which are respectively provided at plural positions where the through-holes are formed in at least two memory elements 5a, 5b, plural discharge cells 12 are formed with the anode electrodes 3 and the cathode electrodes 4 combined, to provide positioning holes 11 in driving voltage supply terminals 10 located outside the effective memory areas for at least two memory elements 5a, 5b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly to a plasma display device in which a pair of memory elements are accurately arranged and set in a plasma display tube so as to increase the definition of a displayed image and increase the size of the device. The present invention relates to a plasma display device which can be achieved.

[0002]

2. Description of the Related Art Generally, an AC plasma display device, a DC plasma display device, and a hybrid plasma display device are known as plasma display devices.

[0003] Here, in the known AC type plasma display device, to give an example of its configuration, a discharge gas is sealed in a plasma display tube formed by arranging a front glass substrate and a rear glass substrate so as to face each other. Forming a plurality of transparent display electrodes arranged in parallel on the front glass substrate in the tube, covering the surface of the plurality of transparent display electrodes with a dielectric layer and a protective film, while forming on the back glass substrate in the tube Forming a plurality of address electrodes arranged in parallel so as to be orthogonal to the plurality of transparent display electrodes, covering the surfaces of the plurality of address electrodes with an insulating layer, and applying a discharge between adjacent address electrodes. A partition (barrier rib) for preventing spread is arranged.

In such a known AC type plasma display device, when performing display, address discharge is first performed between an address electrode and one display electrode within one display pixel, and then display is performed between two display electrodes. Discharge is performed.

In a known DC plasma display device, to give an example of the configuration, a discharge gas is sealed in a plasma display tube having a front glass substrate and a rear glass substrate arranged so as to face each other. A plurality of cathodes arranged in parallel on a front glass substrate in the tube are formed, while a plurality of anode buses arranged in parallel on the rear glass substrate in the tube so as to be orthogonal to the plurality of cathodes. In addition to forming a line, a plurality of island-shaped anodes and a plurality of resistors for connecting the plurality of anodes to the corresponding plurality of anode bus lines are provided at positions facing the plurality of cathodes. Form. Also,
An insulating layer is formed on the rear glass substrate inside the tube except for a plurality of anode forming portions, and a cross-shaped partition wall and auxiliary space partition walls are formed so as to surround the plurality of anode forming portions. is there.

In such a known DC plasma display device, a driving voltage is supplied between any one of a plurality of anode bus lines and any one of a plurality of cathodes when displaying, and the driving voltage is supplied. The display discharge is performed between one anode and the corresponding cathode.

3 (a) and 3 (b) show an example of the configuration of a known hybrid type plasma display device. FIG. 3 (a) is an exploded perspective view of a main part in such a configuration, and FIG. It is sectional drawing of the principal part in such a structure.

As shown in FIGS. 3 (a) and 3 (b), in the hybrid type plasma display device of this embodiment, a front glass substrate 31 and a rear glass substrate 32 are arranged so as to face each other. None)
The discharge gas is sealed in the tube. A plurality of anode electrodes 33 arranged in parallel on the rear glass substrate 32 in the tube
Is formed. Inside the tube, the plurality of anode electrodes 33 are orthogonal to the plurality of anode electrodes 33.
Are provided with a plurality of cathode electrodes 34 arranged in parallel at a distance from each other. A pair of memory elements 35a and 35b are arranged inside the tube so as to sandwich a plurality of cathode electrodes 34 therebetween. The pair of memory elements 35a and 35b have a plurality of through holes arranged in a matrix, and thereby a pair of memory electrodes 36a and 36b whose electrode portions form a mesh, and a pair of memory electrodes 36a and 36b. Insulating layer 37 covering the whole surface
a, 37b and protective films 38a, 38b. In this case, the insulating layers 37a and 37b and the protective film 38
a and 38b are positions corresponding to the formation positions of the through holes of the pair of memory elements 35a and 35b, and at positions corresponding to the intersections between the plurality of anode electrodes 33 and the plurality of cathode electrodes 34, A pair of memory elements 35
a, a plurality of through holes communicating with 35b are formed,
These through holes constitute the discharge cells 39. Also,
On the front glass substrate 31 where the discharge cells 39 are provided, red (R), green (G), and blue (B) phosphors 40 are alternately formed by the discharge cells 39. ing.

In the known hybrid type plasma display device, when performing display, a driving voltage is supplied between a predetermined one of a plurality of anode electrodes 33 and a predetermined one of a plurality of cathode electrodes 34, and , A discharge is generated in the discharge cell 39 located at the intersection, and a pulse drive voltage of opposite polarity is supplied between the pair of memory electrodes 36a, 36b to generate wall charges on the insulating layers 37a, 37b, This is to maintain the discharge in the discharge cell 39.

[0010]

By the way, in the above-mentioned known AC type plasma display device, electric charges are accumulated in an insulating layer covering the address electrodes and have a memory function by wall charges. Even if high resolution is achieved, there is an advantage that the luminance does not decrease, but at the time of display operation, various signals such as a write signal, a memory signal, and a memory erase signal are supplied between the display electrode and the address electrode, respectively. Therefore, there is a problem that the configuration of the signal driving circuit becomes considerably complicated.

Although the known DC plasma display device has a discharge auxiliary space, a display image having a high-contrast luminance characteristic can be obtained as a display image, but the structure of the device is considerably complicated. Therefore, high assembling accuracy is required when assembling the device, and furthermore, during display operation, the electrodes constituting the cathode and the anode are directly subjected to ion bombardment, causing a sputtering phenomenon. There is a problem that it becomes shorter.

Further, the above-mentioned known hybrid type plasma display device can temporarily solve the above-mentioned problem, and it is easy to achieve a high brightness of a display image.

However, in the known hybrid type plasma display device, when the size of the device is to be increased or the display image is to be enhanced, only the size of the pair of memory electrodes 36a and 36b in a mesh shape is increased. Therefore, it is necessary to make the distance between one discharge cell 39 and the discharge cell 39 adjacent thereto as small as possible. In order to satisfy such a need, the mesh shape should be made as small as possible, and a mesh-like pair should be formed. Insulating layers 37a, 37b covering the surfaces of the memory electrodes 36a, 36b
After the thickness of the pair of memory electrodes 36 is substantially constant.
The positioning between a and 36b must be performed accurately.

In this case, in the known hybrid plasma display device, the mesh shape is made as small as possible, and the insulating layer 37 covering the surfaces of the pair of memory electrodes 36a, 36a in the mesh shape.
It is technically achievable to make the thicknesses of the a and 37b substantially constant.
Accurately positioning between the pair of memory electrodes 35a and 35b is not possible because there is no space for providing positioning means in the effective memory area of the pair of memory electrodes 36a and 36b. Inevitably, it is necessary to visually determine the position of the assembling manufacturer, and as a result, it is extremely difficult to accurately determine the position between the pair of memory elements 35a and 35b. It has the problem that it cannot be achieved.

The present invention solves such a problem, and an object of the present invention is to achieve a plasma display which can achieve high brightness of a display image, and which can cope with an increase in the size of a device and a high definition of a display image. It is to provide a display device.

[0016]

In order to achieve the above object, a plasma display device according to the present invention is provided, when two or more memory elements are provided in a plasma display tube, outside the effective memory area of these memory elements. Is preferably provided with a mark for positioning on the drive voltage supply terminal of the memory element.

According to the above-mentioned means, when two or more memory elements having the same configuration are superimposed and assembled into the plasma display tube, first, the positioning means provided at the drive voltage supply terminals of the two or more memory elements is provided. Accurately superimpose using the mark, align the two or more memory elements, and then mark the positioning of the drive voltage supply terminals of the two or more memory elements that have been aligned with the front glass substrate Alternatively, by aligning a predetermined position on the rear glass substrate, two or more memory elements can be accurately positioned at positions where they should be arranged in the plasma display tube. It is possible to sufficiently cope with high definition.

According to the above means, since the hybrid type plasma display device has two or more memory elements incorporated in the plasma display tube, it is possible to achieve high brightness of a displayed image.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment of the present invention, a plasma display device has a plurality of through holes in a matrix in a plasma display tube filled with a discharge gas, and the entire surface of an effective memory area is insulated. Two or more memory elements of the same configuration covered and overlapped by a layer, a plurality of anode electrodes arranged in parallel, and a plurality of cathode electrodes arranged in parallel so as to be orthogonal to the anode electrode are provided. An anode electrode and a cathode electrode are coupled to a plurality of communication portions provided at positions where a plurality of through-holes of at least one memory element are formed to form a plurality of discharge cells. A mark (hole) for positioning the memory element is provided in a portion outside the memory area.

In a preferred embodiment of the present invention,
Portions outside the effective memory area of the two or more memory elements provided with the memory element positioning holes are drive voltage supply terminals for the two or more memory elements.

In a specific example of the embodiment of the present invention,
A drive voltage supply terminal provided with a memory element positioning hole is provided in at least three places in each of two or more memory elements.

According to these embodiments of the present invention, when two or more memory elements having the same configuration are superimposed and incorporated into a plasma display tube, first, two or more memory elements are required.
Using the positioning holes of the exposed drive voltage supply terminals provided in the one or more memory elements, they were accurately overlapped, the two or more memory elements were aligned, and then the alignment was performed. Utilizing the positioning holes of the drive voltage supply terminals of one or more memory elements, the front glass substrate or the rear glass substrate is positioned at a predetermined location, and the two or more memory elements are positioned with respect to the tube. By doing so, two or more memory elements can be accurately positioned and arranged at the place where they are to be arranged in the plasma display tube, and even if the apparatus is enlarged or the display image is made finer, A sufficiently compatible plasma display device can be obtained.

According to the embodiments of the present invention, since the plasma display device is a hybrid type in which two or more memory elements are incorporated in the plasma display tube, it is possible to increase the brightness of a displayed image. An achievable plasma display device is obtained, and the positioning hole is provided in the drive voltage supply terminal which is an existing component outside the effective memory area of the two or more memory elements. There is no need to newly provide an arrangement location, and it is possible to effectively position two or more memory elements without being obstructed by anything.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) and 1 (b) are diagrams showing a configuration of an embodiment of a plasma display device according to the present invention, wherein (a) is a perspective view of main components and (b) is a main component. FIG.

FIG. 2 is a plan view showing an example of the configuration of a memory electrode used in the memory device shown in FIG.

In FIGS. 1A and 1B and FIG.
Is a front glass substrate, 2 is a rear glass substrate, 3 is an anode electrode (first address electrode), 4 is a cathode electrode (second address electrode), 5a and 5b are memory elements, 6a and 6b.
Is a memory electrode, 7a and 7b are insulating layers, 8a and 8b are protective layers, 9 is an effective memory area of the memory electrode 6a (6b), 10 is a drive voltage supply terminal, 11 is a positioning hole,
2 is a discharge cell, 13 is a through hole of the memory electrode 6a (6b), and 14 is a phosphor.

As shown in FIGS. 1 (a) and 1 (b), in the plasma display device of the present embodiment, the front glass substrate 1 and the rear glass substrate 2, which are arranged to be spaced apart from each other, are made of frit glass. And a plasma display tube (not shown) sealed with a sealing material such as. A discharge gas made of one or more of inert gases such as helium (He), neon (Ne), argon (A), and xenon (Xe) is sealed in the tube. A plurality of anode electrodes 3 arranged in a parallel state are formed on the rear glass substrate 2 in the tube. Inside the tube, there are provided a plurality of cathode electrodes 4 which are orthogonal to the plurality of anode electrodes 3 and are arranged in parallel in a state of being separated from the plurality of anode electrodes 3. Inside the tube, a pair of memory elements 5a and 5b overlapping each other so as to sandwich a plurality of cathode electrodes 4 are arranged. As shown in FIG. 2, the pair of memory elements 5a and 5b have a plurality of through-holes 13 arranged in a matrix, and the pair of memory electrodes 6a and 6b whose electrode portions form a mesh. A pair of memory electrodes 6a, 6
The insulating layer 7 covering the entire surface of the effective memory area 9 of FIG.
a, 7b and protective layers 8a, 8b. In the pair of memory elements 5a and 5b, the insulating layer 7
a, 7b and the protective layers 8a, 8b are formed with through holes at positions corresponding to the formation positions of the through holes 13 of the pair of memory elements 5a, 5b.
When the a and b are disposed in the tube, the positions of these through holes are determined by the plurality of anode electrodes 3 and the plurality of cathode electrodes 4.
The portions corresponding to the intersections of the above and the through-holes and communicating the anode electrode 3 and the cathode electrode 4 constitute the discharge cells 12, respectively. On the front glass substrate 1 where the discharge cells 12 are provided, red (R), green (G), and blue (B) phosphors 14 are alternately applied to the discharge cells 12. ing.

The pair of memory electrodes 6a and 6b are
As shown in FIG. 2, a pair of memory electrodes 6a, 6b
Drive voltage supply terminals 10 protruding outward from the effective memory area 9 are provided at the four corners, and a positioning hole 11 is provided at each drive voltage supply terminal 10. In this case, the drive voltage supply terminal 10 is
a, 7b and the protective layers 8a, 8b, and are always exposed.

The pair of memory electrodes 6a and 6b in the plasma display device having the above configuration are incorporated in the plasma display tube as follows.

First, as shown in FIG. 2, a large number of through-holes 13 are formed in a matrix in the effective memory area 9 and a hole 4 having a positioning hole 11 is provided outside the effective memory area 9.
A pair of memory electrodes 6a and 6b having two drive voltage supply terminals 10 are formed by etching a metal plate or the like. As a metal plate used in this case, a metal plate of stainless steel, aluminum, nickel, or the like is used.

Next, the obtained pair of memory electrodes 6a,
A paste-like insulating material is applied to the effective memory area 9 (memory electrodes 6a and 6b excluding the drive voltage supply terminal 10) of 6b and baked at a high temperature to cover the insulating layers 7a and 7b. In this case, the application of the paste-like insulating material is performed, for example, by spraying or dipping a paste-like glass powder.

Next, protective layers 7a and 7b made of magnesium oxide (MgO) are formed on the insulating layers 7a and 7b covered with the pair of memory electrodes 6a and 6b, and the pair of memory elements 5a and 5b are formed. obtain. The pair of memory elements 5a and 5b obtained at this time is the insulating layer 7 at the portion where the large number of through holes 13 of the pair of memory electrodes 6a and 6b are arranged.
a, 7b and protective layers 7a, 7b are provided with similar through holes (not shown), and the four drive voltage supply terminals 10 are exposed without being covered with the insulating layers 7a, 7b and the protective layers 7a, 7b. It is in the state where it was done.

Subsequently, a pair of memory elements 5a, 5b are arranged vertically and a pair of memory elements 5a, 5b are positioned by using a positioning hole 11 provided in the drive voltage supply terminal 10.
Are superimposed so that the positions of are completely matched.

Next, a pair of memory elements 5
a and 5b are again attached to a predetermined portion of the front glass substrate 1 or the rear glass substrate 2 using the positioning holes 11 provided in the drive voltage supply terminal 10.
In this case, a predetermined portion of the front glass substrate 1 or the rear glass substrate 2 is provided with a positioning mark provided on the front glass substrate 1 or the rear glass substrate 2 (previously provided on the front glass substrate 1 or the rear glass substrate 2). ), Or may be a location where any target component of the front glass substrate 1 or the rear glass substrate 2 is disposed.

Thereafter, the peripheral portions of the front glass substrate 1 and the rear glass substrate 2 are sealed with a sealing material such as frit glass to form a plasma display tube. A plasma discharge device is completed by filling a gas for discharge.

The display operation of the plasma display device having the above configuration is almost the same as the display operation of the known hybrid type plasma display device. Therefore, a detailed description of the display operation is omitted. A driving voltage is supplied between a predetermined electrode and a predetermined one of the plurality of cathode electrodes 4 to cause a discharge in a discharge cell 12 located at an intersection thereof, and a driving voltage is supplied through a driving voltage supply terminal 10. By supplying a pulse drive voltage of opposite polarity between the pair of memory electrodes 6a and 6b to generate wall charges on the insulating layers 7a and 7b, the operation is performed to maintain the discharge in the discharge cells 12. is there.

In this embodiment, an example in which a pair of memory elements 5a and 5b is used as the memory element has been described, but the memory element according to the present invention is not limited to such a pair, and three or more memory elements may be used. A stack of the above memory elements may be used.

In this embodiment, the drive voltage supply terminal 10 having the positioning hole 11 has been described as being arranged at the four corners of the pair of memory electrodes 5a and 5b. The location of the drive voltage supply terminals 10 having the holes 11 is not limited to those arranged at the four corners. If there are drive voltage supply terminals 10 having at least three positioning holes 11, a pair of the memory electrodes 5a, 5b is provided. It may be arranged in any part of. That is, the memory electrodes 5a and 5b may be arranged only at three corners, may be arranged at one or more corners in addition to the four corners, or may be arranged at three or more corners only. May be.

As described above, according to the present embodiment, when two or more memory elements 5a and 5b are overlapped and incorporated into the plasma display tube, the drive provided in each of the two or more memory elements 5a and 5b is provided. Voltage supply terminal 1
By using the positioning hole 11 of 0, accurate alignment between the two or more memory elements 5a and 5b is performed.
Two or more memory elements 5a, 5
By using the positioning hole 11 of the drive voltage supply terminal 10 of FIG. 2B again to perform positioning at a predetermined position on the front glass substrate 1 or the rear glass substrate 2, two or more memory elements 5a and 5b can be connected. It is possible to accurately position at a predetermined place in the plasma display tube,
A plasma display device which can sufficiently cope with an increase in the size of the device and a high definition of a display image can be obtained.

Further, according to the present embodiment, the plasma display device is of a hybrid type in which two or more memory elements are incorporated in the plasma display tube, so that the plasma display capable of achieving high brightness of the displayed image can be achieved. The device is obtained and the positioning drive hole 11 is an exposed drive voltage supply terminal 10 which is an existing component outside the effective memory area 9 of the two or more memory elements 5a and 5b.
It is not necessary to newly provide a location where the positioning hole 11 is disposed because the driving voltage supply terminal 10 is exposed on the positioning hole 11. Positioning of two or more memory elements 5a and 5b can be performed.

[0042]

As described above, according to the present invention, when two or more memory elements having the same configuration are superimposed and incorporated into the plasma display tube, first, the two or more memory elements are provided in the two or more memory elements. Using the positioning hole of the drive voltage supply terminal in the exposed state,
Alignment between one or more memory elements, and then using a positioning hole for a drive voltage supply terminal of the two or more memory elements that have been aligned, use a predetermined hole in the front glass substrate or the rear glass substrate. By aligning the two or more memory elements with respect to the tube, the two or more memory elements can be accurately positioned and arranged at the positions to be arranged in the plasma display tube. In addition, there is an effect that a plasma display device which can sufficiently cope with the case where the size of the device is increased or the definition of a display image is increased is achieved.

Further, according to the present invention, the plasma display device is of a hybrid type in which two or more memory elements are incorporated in the plasma display tube, so that the plasma display device capable of achieving high brightness of a displayed image can be achieved. Is obtained.

Further, according to the present invention, the positioning hole is provided in the exposed driving voltage supply terminal which is an existing component outside the effective memory area of the two or more memory elements. In addition to the necessity of providing a new location, there is also an effect that two or more memory elements can be effectively positioned without being disturbed by the exposed drive voltage supply terminal. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a plasma display device according to the present invention.

FIG. 2 is a plan view showing an example of a configuration of a memory electrode used in the memory device shown in FIG.

FIG. 3 is a configuration diagram illustrating an example of a configuration of a known hybrid plasma display device.

[Explanation of symbols]

 Reference Signs List 1 front glass substrate 2 back glass substrate 3 anode electrode (first address electrode) 4 cathode electrode (second address electrode) 5a, 5b memory element 6a, 6b memory electrode 7a, 7b insulating layer 8a, 8b protective layer 9 effective memory area DESCRIPTION OF SYMBOLS 10 Drive voltage supply terminal 11 Positioning hole 12 Discharge cell 13 Through hole 14 Phosphor

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroshi Kawasaki 3681 Hayano, Mobara-shi, Chiba Hitachi Device Engineering Co., Ltd. (72) Inventor Norio Nakamura 3300 Hayano, Mobara-shi, Chiba Electronic Device Division, Hitachi, Ltd.

Claims (3)

[Claims] 1. A plasma display tube filled with a discharge gas, two or more memory elements having a plurality of through-holes arranged in a matrix, the entire surface of an effective memory area being covered with an insulating layer, and overlapping. Providing a plurality of anode electrodes arranged in parallel and a plurality of cathode electrodes arranged in parallel so as to be orthogonal to the anode electrode, respectively, at positions where the plurality of through holes of the two or more memory elements are formed. A plurality of discharge cells are formed by connecting the anode electrode and the cathode electrode to a plurality of communication portions provided, and a mark for positioning a memory element is formed on a portion of the two or more memory elements outside the effective memory area. A plasma display device comprising: 2. The drive voltage supply terminal of the two or more memory elements, wherein a portion outside the effective memory area of the two or more memory elements is a drive voltage supply terminal.
3. The plasma display device according to 1. 3. The plasma display device according to claim 2, wherein the two or more memory elements have driving voltage supply terminals at at least three places.