JP2000123741A - Display discharge tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve display having high-brightness and high-fineness. SOLUTION: In this display discharge tube, discharge spaces are formed in every cells in substrates 1, 2 oppositely arranged, and first address electrodes 6, a pair of display electrodes (5) sandwiching the first address electrodes 6 and a dielectric layer covering the electrodes are formed on the discharge space side of one substrate. And, second address electrodes are formed on the surface of the discharge space side of the other substrate. The first address electrodes 6 and the pair of display electrodes (5) are respectively united in every cell, and they do not cross to each other in paths to extraction electrodes of them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display discharge tube, and more particularly to a display discharge tube for selecting a pixel by an address operation using plasma discharge.

[0002]

2. Description of the Related Art This type of display discharge tube is called a plasma display panel (PDP), and is roughly classified into a direct current type (DC type), an alternating current type (AC type), and a hybrid type combining these types. Is done. Among them, AC type P
DP has a memory function using so-called wall charges,
A discharge space is formed for each cell in the substrate arranged to face each other, and a dielectric layer is formed on a surface of one of the substrates on the discharge space side, covering the first address electrode, the display electrode, and these electrodes. And a second address electrode is formed on the surface of the other substrate on the side of the discharge space. Then, an initial discharge is performed between the first address electrode and the second address electrode to charge the surface of the dielectric layer, and thereafter the display electrode and the first address electrode are charged using the charge. A display is performed by causing a discharge in between.

[0003]

The above-mentioned AC type PDP
Control the presence or absence of discharge between the first address electrode and the display electrode adjacent to each other based on the difference in distance between adjacent electrodes in the adjacent cells. For this reason, it has been pointed out that it is difficult to increase the definition and the luminance by changing the electrode dimensions while maintaining the definition. Also, by increasing the distance between the electrodes for display, high brightness and high efficiency can be achieved.However, in such a case, the discharge voltage has to be increased, and the driving circuit becomes expensive and becomes practical. Has been pointed out to be difficult. The present invention has been made based on such circumstances, and an object of the present invention is to provide a display discharge tube capable of achieving high brightness and high definition display despite an extremely simple configuration. is there.

[0004]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows. In other words, a discharge space is formed for each cell in the substrate arranged to face each other, and a first address electrode and a pair of display devices arranged on the surface of the one substrate on the discharge space side with the first address electrode interposed therebetween. Electrodes, and a dielectric layer is formed so as to cover these electrodes, and a second address electrode is formed on the surface of the other substrate on the side of the discharge space. A display discharge tube for performing discharge, wherein the first address electrode and the pair of display electrodes are respectively common to a plurality of cells, and do not intersect in a path to the extraction electrode. It is characterized by having become.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a display discharge tube according to the present invention will be described below with reference to the drawings.

<< Schematic Configuration of Display Discharge Tube >> FIG. 3 is an exploded perspective view showing a schematic configuration of an embodiment of a display discharge tube according to the present invention, and FIG. 4 is a sectional view thereof. Here, FIG. 4 shows the first substrate rotated by 90 ° with respect to the second substrate in order to facilitate understanding of the structure. FIG. 5 is a configuration diagram showing the electrodes on the front glass substrate side of the display discharge tube.

[0007] In each of the drawings, the surface of the front glass substrate 1 on the discharge space side of the substrates arranged opposite to each other has x in the drawings.
A display electrode 5 and a first address electrode 6 extending in the direction are formed.

In this case, these electrodes are arranged in the y direction in the figure as a display electrode 5, a first address electrode 6, a display electrode 5, a first address electrode 6, a display electrode 5,...
In other words, a pair of display electrodes are arranged with each first address electrode 6 interposed therebetween. A transparent dielectric layer 8a is formed so as to cover these electrodes, and a protective film 9 is formed on the surface thereof.

On the other hand, a second address electrode 7 extending in the y direction in the drawing is formed on the surface of the rear glass substrate 2 on the side of the discharge space, and the second address electrode 7 also covers the second address electrode 7 so as to cover the white dielectric layer 8b. Are formed.

[0010] Further, between the front glass substrate 1 and the rear glass substrate 2, grid-like partitions 3, 4 are arranged.
The space formed by the partitions 3 and 4 is a discharge space in one cell.

FIG. 5 shows an arrangement relationship between the first address electrode 6 and the display electrode 5 with respect to each cell (portion surrounded by a dotted line in the figure).

A phosphor film 10 is provided on the surface of the region surrounded by the partitions 3 and 4 on the white dielectric film 8b side.
Are formed. This phosphor film 10 has, for example, the same color in each cell arranged in the y direction in the figure, and is arranged in the x direction in the figure in the order of R, G, B, for example.

[0013] The display discharge tube having such a structure is as follows.
By independently providing an address electrode pair including the first address electrode 6 and the second address electrode 7 and a display electrode pair including 5M1 and 5M2, the electrodes 5M1 and 5M2 constituting the display electrode pair are adjacent to each other. It can be commonly used in the discharge region.

For example, by forming a grid-like partition wall 4 on the substantially center of each of 5M1 and 5M2 so that two sides thereof overlap, a discharge space (discharge region) can be separated, and the display electrode is connected to an adjacent cell. A clear image free from crosstalk can be obtained even when commonly used.

The basic operation of the display discharge tube configured as described above includes three processes of address (writing), display (maintenance), and erasing.

That is, in the address discharge, the first address electrode 6 of the front glass substrate 1 and the second address electrode 6 of the rear glass substrate 2
A predetermined data pulse voltage is applied between the address electrodes 7 to generate a counter discharge first, and charges called wall charges remain on the surface of the transparent dielectric layer 8a of the cell to be discharged.

Next, when a voltage of the sustain pulse is applied between the display electrodes 5M1 and 5M2, the voltage due to the wall charge is increased in the cell having the wall charge because the sustain voltage is increased, whereas the discharge is not performed in the cell having no wall charge. Does not occur.

Further, a narrow pulse or a low voltage pulse is applied between the display electrodes 5M1 and 5M2 to generate a weak discharge or a short discharge, thereby erasing the wall charges of all the cells once.

<< Electrode Structure of Front Glass Substrate >> FIG. 1 shows display electrodes 5M1 and 5M formed on front glass substrate 1.
2 is a plan view showing a configuration of a second address electrode 6; FIG. That is, as shown in FIG.
Display electrode 5M1, first address electrode 6, display electrode 5
M2, the first address electrode 6, the display electrode 5M1, the first address electrode 6,... Details of this arrangement are shown in FIG.

Each of the display electrodes 5M1 extends, for example, to the right in the drawing, extends to the outside of the display area formed by the aggregate of the cells, and is commonly connected to each other by a common (leading) line. I have. This is because, as is clear from the operation of the above-described display discharge tube, there is no problem even if the display electrodes 5M1 are united and connected in common.

Each of the display electrodes 5M2 extends to the left in the figure, extends to the outside of the display area, and is commonly connected to each other by a common line. This is because, as is clear from the operation of the display discharge tube described above, there is no problem even if the display electrodes 5M2 are united and connected in common.

When a signal is supplied to each of the display electrodes 5M1 and 5M2, the signal is supplied from both ends or one end of the corresponding common line. As a result, the display electrodes are provided at the four corners of the front glass substrate 1. An electrode for leading out the electrode is formed.

Further, the first address electrodes 6 extend, for example, to the left in the figure, extend to the outside of the display area, and are each provided with a signal supply terminal.

In this case, each signal supply terminal of each first address electrode is located before the common line of the display electrode 5M2.
That is, the extending portion of the first address electrode is arranged without crossing the common line.

As a result, the display electrodes of 5M1 and 5M2 and the first address electrodes can be formed on the same layer surface without having a multilayer structure with an insulating film interposed therebetween, for example.

Each signal supply terminal of the first address electrode 6 is connected to, for example, a connector of a drive circuit (for example, without crossing the common line of the display electrode 5M2 and electrically contacting the common line). FPC).

In the above description, each of the first address electrodes 6 extends completely to the left in the drawing, and a signal supply terminal is formed at an end thereof. However, for example, the odd-numbered first address electrodes counted from the top extend all the way to the left in the figure to form signal supply terminals at their ends, and the even-numbered first address electrodes all extend to the right in the figure. It goes without saying that a signal supply terminal may be formed at the end.

In this case, the pitch of each signal supply terminal of the first address electrode is increased, and the alignment with the connector or the like connected to these signal supply terminals is facilitated.

<< Method of Manufacturing Display Discharge Tube >> One embodiment of a method of manufacturing the above-described display discharge tube will be described below. Here, the front glass substrate 1 and the rear glass substrate 2
Is 2.0 mm thick soda glass, and the display cell pitch is 0.33 mm in width and 1.0 mm in length. In addition,
The thickness of the glass substrate basically has vacuum strength and is not particularly limited as long as there is no problem in handling. Further, as a material of the glass, more preferably, a high strain point glass can be selected.

Production of Front Glass Substrate On the front glass substrate 1, an electrode pair 5M1,5
Transparent electrodes 5b and 6b as M2 and first address electrode 6 are patterned with a width of 0.60 mm and 0.15 mm using, for example, an ITO film. And electrode pair 5M
1, 5M2 and the transparent electrodes 5b, 6b of the first address electrode 6
For example, Cr-C is used as the mother electrodes 5a and 6a
A u-Cr multilayer film is formed with a width of 0.06 mm by a thin film process.

The display electrode 5 includes a transparent electrode 5b and a mother electrode 5a.
By using, an electrode having low electric resistance and a large area can be formed while suppressing a decrease in light transmittance.

When a transparent electrode and a mother electrode are used as the first address electrode 6 in the same manner as the electrode pair 5M1 and 5M2 of the display electrode 5, a decrease in light transmittance is suppressed, and a low electric resistance and area are obtained. Large electrodes can be formed.

Here, the electrode pair 5 of the display electrode 5 is used.
Although an example in which transparent electrodes are used for M1, 5M2 and the first address electrode 6 has been described, the electrode pair 5M of the display electrode 5 is used.
It is not always necessary to use transparent electrodes for the 1,5M2 and the first address electrodes. Particularly, in a pattern in which the electrode pair 5M1 and 5M2 of the display electrode 5 does not use a transparent electrode but includes only the mother electrode, for example, the electrode width is set to 0.1.
When formed to have a thickness of 2 to 0.6 mm, the electrode spacing is widened and the sustaining voltage is increased, but the luminous efficiency can be increased.

The material of the mother electrodes 5a and 6a only needs to have a small electric resistance, and there is no problem even if a metal film of Ag, Ni, Al, Au or the like or a multilayer film of Cr-Au-Cr or the like is used.

In the above description, the ITO film is used as the transparent electrode. However, if there is no problem if the electrode area can be secured without lowering the transmittance, a Nesa film or the like can be used.

After the above electrodes are formed, a transparent dielectric layer 8a made of transparent glass or the like is formed on the front surface so as to cover the electrodes, and a pair of electrodes 5M1 and 5M constituting the display electrode 5 is formed.
Above the mother electrode 5a formed on the second transparent electrode 5b,
The grid-shaped partition walls 4 are placed in a 0. 1 position so that two of the four sides overlap.
Formed at a height of 01 mm. The lattice-shaped partition walls 4 are made of black glass or the like. For example, when lamination is performed by printing, at least one of the layers is made black to improve the contrast.

If the grid-shaped partition 4 is formed on the transparent electrode 5b of the display electrode, there is no problem in the image display function, but it is parallel to the extending direction of the display electrode 5. When a portion is formed so as to overlap with the mother electrode 5a, a decrease in transmittance can be suppressed, and a displayed image becomes bright.

After forming the grid-like partition walls 4, an MgO film is formed as the protective film 9 to a thickness of 500 to 800 nm by, for example, electron beam evaporation (EB evaporation).

Manufacture of Rear Glass Substrate On the rear glass substrate 2, a second address electrode 7 is formed with a metal film of Ag, Ni, Al, Au or the like or a Cr—Cu—Cr, Cr— It is formed by a printing method or a photo process with a multilayer film of Au-Cr or the like. On this electrode, a white dielectric layer 8b is formed with a thickness of 0.015 nm by printing an insulating material such as white glass.

The white dielectric layer 8b does not greatly differ in basic function whether or not it is formed. By forming the white dielectric layer 8b, the utilization rate of the reflected light of the phosphor 10 is improved, and the role of the protective film of the second address electrode 7 when forming the grid-like partition walls 3 by using sandblasting is improved. Add

One direction corresponds to the second address electrode 7.
And a display electrode pair 5M on the front glass substrate 1 which is parallel to and interposed between them and whose direction intersecting with the display electrodes is opposed to each other.
A grid-like partition wall 3 located substantially at the center of each of 1,5M2 is formed by printing, sandblasting, or the like. That is,
The partition wall 3 overlaps a grid-like partition wall 4 formed on the front substrate.

Thereafter, on the second address electrode 7 or on the inner wall surface of the lattice-shaped partition 3, for example, the phosphor 10 of each color of RGB is formed by printing or the like so as to have the same color in the extending direction of the second address electrode 7. I do.

The lattice-shaped partition wall 3 of this embodiment has a width of 0.06 mm and a height of 0.15 mm, and is formed by printing or sandblasting.

Assembling of each substrate Front glass substrate 1 and rear glass substrate 2 thus obtained
However, the frit glass is formed such that the grid-shaped partition walls 3 formed on the rear glass substrate 2 and the grid-shaped partition walls 4 formed on the front glass substrate 1 overlap and an exhaust pipe (not shown) is fixed. After sealing, the gas is exhausted, sealed gas is sealed, and the chip is chipped off. The filling gas is an ionizable gas such as He-Xe or Ne-Xe, and is completed by filling at 25 ° C. at a pressure of about 400 Torr.

Various electrode extraction methods other than those of the above-described embodiment can be considered, but it is found that none of them is practically sufficient.

For example, as shown in FIG.
When M1 and 5M2 are pulled out without being combined in the same direction and connected to the FPC connector, the display electrode 5M1
In the case where the connection between both sides and the connection between the display electrodes 5M2 are made, the configuration becomes extremely complicated.

As shown in FIG. 7, the display electrode 5M2
The display electrodes 5M1 are electrically connected by a printing method or the like in a state where the electrodes are connected together by a conductive paste or the like by a printing method or the like and are collectively drawn out, and an insulating layer such as a transparent dielectric is once interposed therebetween. It can also be connected with a paste of nature or the like and brought together.

However, in this case, if the thickness of the insulating layer is small, dielectric breakdown occurs when a voltage is applied to the display electrodes 5M1 and 5M2, and there is a fear of disconnection. If the thickness is too thick, there is a fear of disconnection due to a step when the paste for connecting the display electrodes crosses the insulating layer.

Further, when the display electrodes 5M1 and 5M2 are pulled out in the same direction, there is a fear that discharge is generated in a portion other than the effective screen area.

[0050]

As is apparent from the above description,
According to the display discharge tube of the present invention, high brightness and high definition display can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view of an electrode structure showing one embodiment of a display discharge tube according to the present invention.

FIG. 2 is an enlarged view of FIG. 1;

FIG. 3 is a perspective view of an essential part showing one embodiment of a display discharge tube according to the present invention.

FIG. 4 is a sectional view showing a main part of an embodiment of a display discharge tube according to the present invention.

FIG. 5 is a plan view showing a main part of an embodiment of an electrode of a display discharge tube according to the present invention.

FIG. 6 is a diagram for explaining an effect of the display discharge tube according to the present invention, and is a diagram for explaining a configuration other than the embodiment.

FIG. 7 is a diagram for explaining an effect of the display discharge tube according to the present invention, and is a diagram for explaining a configuration other than the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front glass substrate, 2 ... Back glass substrate, 3, 4 ... Partition, 5 ... Display electrode, 6 ... 1st address electrode, 7 ... 2nd
Address electrodes, 8a: transparent dielectric layer, 8b: white dielectric layer, 9: protective film, 10: phosphor.

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[Procedure amendment]

[Submission date] November 4, 1998 (1998.11.
4)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

Continuing from the front page (72) Inventor Hideo Tanabe 3300 Hayano Mobara-shi, Chiba Pref.Hitachi, Ltd.Electronic Device Division (72) Inventor Yuichi Kijima 3300 Hayano, Mobara-shi, Chiba Pref. ) Inventor Norio Nakamura 3300 Hayano, Mobara-shi, Chiba F-term (Reference) 5C040 FA01 FA04 GB03 GB13 GB14 GC05 GC11 GC12 GD03 GH06 GK02 KA07 LA05 LA06 MA03 MA12

Claims (4)

[Claims] A discharge space is formed for each cell in a substrate opposed to each other, and a first address electrode is disposed on a surface of one of the substrates on the discharge space side with the first address electrode interposed therebetween. A dielectric layer is formed so as to cover the pair of display electrodes and each of the electrodes, and a second address electrode is formed on the surface of the other substrate on the discharge space side. The first address electrode and the pair of display electrodes are respectively common to a plurality of cells, and they intersect in a path to the extraction electrode. Discharge tube for display, characterized in that it is not designed to be. 2. The display discharge tube according to claim 1, wherein one display electrode and the other display electrode of the pair of display electrodes are drawn out in opposite directions, and are respectively connected to the lead-out electrodes. . 3. The display discharge tube according to claim 2, wherein the extraction electrode of the first address electrode is formed on the extraction electrode side of one of the pair of display electrodes. 4. A plurality of first address electrodes, wherein the lead electrodes of the odd-numbered first address electrodes are formed on the lead electrode side of one of the pair of display electrodes. 3. The display discharge tube according to claim 2, wherein the extraction electrodes of the even-numbered first address electrodes are formed on the extraction electrode side of the other display electrode of the pair of display electrodes.