JPH01264137A - Plasma display device - Google Patents

Abstract

PURPOSE:To reduce the discharge starting voltage than a display electrode and reduce the discharge delay by forming the display electrode and independent electrodes on two substrates, laminating dielectric layers, and providing an insulator between these dielectric layers or between the dielectric layer and the electrode on the side where no dielectric layer is laminated. CONSTITUTION:An electrode 8 and an electrode 9 are formed respectively near an electrode 2 serving as a display electrode and a transparent electrode 5, a dielectric layer 3 and a dielectric layer 6 are formed respectively like the electrode 2 and the transparent electrode 5 to constitute this display device. An insulator 10 is arranged between the electrode 8 and the electrode 9. When the insulator 10 is provided between the dielectric layers or between the dielectric layer and the electrode on the side where no dielectric layer is laminated, a discharge is started near the insulator 10 with the voltage lower than the other discharge space. The discharge starting voltage is reduced than the display electrode, and the discharge delay is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plasma display device, and particularly relates to a plasma display device in which two substrates each having a display electrode provided on each substrate surface are arranged so that the display electrode forming surface is the inner surface. The present invention relates to a plasma display device which is arranged to face each other at a constant interval and is hermetically sealed by inserting a discharge medium for discharge light emission.

[Background Art] Plasma display devices can be roughly divided into DC display devices, which have a cathode and an anode facing each other and generate a glow discharge between them.
2. Description of the Related Art There are two types of plasma display devices: AC type plasma display devices, and AC type plasma display devices in which electrodes on which dielectric layers are laminated are placed facing each other and intermittent discharge is caused between the electrodes.

In general, these plasma display devices have a discharge delay when starting discharge. The discharge delay is the time it takes for electrons and ions to be generated, multiplied by the electron avalanche phenomenon, and then to discharge. To improve this discharge delay.

It is effective to supply electrons and ions to the discharge space in advance, and when using a plasma display as a display device where response performance is an issue, an electrode for supplying electrons and ions is provided in addition to one display electrode. The response performance can be improved by separately causing a discharge and supplying electrons and ions.

[Object of the Invention] Generally, it is known that the discharge delay can be reduced by applying an overvoltage with respect to the discharge start voltage. This is mainly because the time during which electrons and ions are multiplied by the electron avalanche phenomenon is shortened.

If the discharge start voltage between the electrodes for supplying electrons and ions is reduced, the value of overvoltage (applied voltage - discharge start voltage) will increase and the discharge delay time will be shortened even if the same applied voltage is applied. Ru.

The present inventors have conducted intensive research on the structure of a plasma display that can reduce the firing voltage, and as a result, have found an AC type plasma display.

It was discovered that the discharge starting voltage was reduced by sandwiching an insulator between the dielectric layers formed between the electrodes and applying an alternating voltage between the electrodes, leading to the present invention.

An object of the present invention is to provide a plasma display device having an electron and ion supply source with a reduced firing voltage.

[Summary of the Invention] A plasma display device according to the first invention of the present application includes two substrates having display electrodes provided on each substrate surface, which face each other at a constant interval with the display electrode forming surface being the inner surface, Further, in a plasma display device in which a discharge medium used for discharge light emission is enclosed and hermetically sealed, electrodes independent of the display electrodes are formed on the two substrates, and further, one or both of the independent electrodes are provided with an electrode. The electron ion supply source is constructed by laminating dielectric layers and providing an insulator between the dielectric layers or between the dielectric layer and the electrode on the side where the dielectric layer is not laminated. .

In addition, the plasma display device of the second invention of the present application is
Two substrates having display electrodes provided on each substrate surface are faced to each other with a constant interval maintained with the display electrode forming surface being the inner surface, and a discharge medium to be used as a discharge medium is enclosed and hermetically sealed. in a plasma display device.

A dielectric layer is laminated on one or both of the display electrodes provided on the substrate surface, and a part between the dielectric layers on the display electrode or an electrode on the side where the dielectric layers are not laminated. The electron ion supply source is configured by providing an insulator in a portion between the two.

[Function] First, before explaining the function of the plasma display device of the present invention, the configuration and operation of an AC type plasma display will be briefly described.

In an AC type plasma display, two substrates each having a display electrode formed on the surface and laminated with a dielectric layer are placed facing each other at a constant distance with the display electrode forming surface being the inner surface, and a discharge light source is used for discharge light emission between the two substrates. A medium is enclosed and hermetically sealed, and when a voltage higher than the discharge starting voltage of the discharge medium is applied, discharge occurs between the display electrodes and light is emitted. Note that the dielectric layer may be formed only on the display electrode of one substrate.

Once the discharge starts, the generated electrons and cations are attracted to the electrodes corresponding to the anode and cathode, respectively, and are drawn onto the respective dielectric layers (or the display electrode on the side where the dielectric layer and dielectric layer are not laminated). ) and form a so-called wall charge. This wall charge forms an electric field in the opposite direction to the applied voltage, so the discharge stops. When the direction of the applied voltage is reversed in this state, the electric field due to the wall charge and the electric field due to the applied voltage are superimposed, and discharge occurs at a value lower than the initial discharge starting voltage. In this way, once the discharge starts,
If an AC drive voltage lower than the initial discharge start voltage is applied, the discharge will continue intermittently.

The present inventors have proposed that in such an AC type plasma display, an insulator such as a glass bead or a glass rod be placed between the dielectric layers or between the dielectric layer and the electrode on the side where the dielectric layer is not laminated. When the insulator is installed, a phenomenon has been discovered in which discharge starts at a lower voltage near the insulator than in other discharge spaces.

The first invention of the present application utilizes such a phenomenon to form electrodes independent of the display electrodes on two substrates, further form a dielectric layer, and to form a dielectric layer between the dielectric layers or between the dielectric layer and the dielectric layer. By providing an insulator between the electrode on the side where the layers are not laminated, an electron ion supply source is constructed, and by lowering the discharge starting voltage from the display electrode, the electron ion supply source is first discharged, and then It supplies electron ions to the display electrode to reduce discharge delay.

The second invention of the present application does not provide separate electrodes, but provides insulation between a part of the dielectric layer on the display electrode or a part of the display electrode on the side where the dielectric layer and the dielectric layer are not laminated. By providing a body, a part of the display electrode is used as an electron ion supply source, which simplifies the configuration, further reduces loss of supplied electron ions, and further reduces discharge delay.

[Example] EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention will be described in detail using the drawings.

First, prior to explaining the present invention, the configuration of an AC type plasma display device will be explained.

FIG. 3 is an exploded view of an example of an AC type plasma display device, and FIG. 4 is a partial sectional view thereof.

As shown in both figures, transparent electrodes such as ITO1 and tin oxide, or electrodes 2 of Ag, AI, and Ni'4 are placed on an insulating substrate 1 made of glass, ceramic, etc., which serves as a rear substrate, and are coated with letters, numbers, katakana, hiragana, and kanji. .

A symbol 1 is formed by patterning into a desired display form such as a figure, and a dielectric layer 3 of a transparent or desired color is further formed thereon.
will be established.

Similarly, the IT
A transparent electrode 5 made of O1 tin oxide or the like is formed and provided in the same display form so as to correspond to the electrode 2, and a transparent dielectric M6 is further provided thereon.

The dielectric layers 3 and 6 are the insulating substrate 1. When the transparent substrate 4 is a glass plate, lead-containing low melting point glass is preferably used. Note that MgO is formed on the dielectric layer 3.6 for the purpose of lowering the voltage and increasing the lifespan.

MgF2. A protective film such as CeO is often laminated.

The insulating substrate 1 and the transparent substrate 4 are sandwiched between spacers to maintain a constant distance, and the discharge medium is hermetically sealed with a frit glass 7.

Single or mixed discharge gases such as Ne, Ar, N2, CO2, Xe, He, and Kr are used.

Next, a plasma display device of the present invention will be explained.

FIGS. 1(A) to (B) are explanatory diagrams showing the first AC type plasma display device of the present application, and FIG. 1(A) is a schematic cross section showing the AC type plasma display device of the first embodiment. FIG. 1 (B) to (B) are the second embodiment.
FIG. 7 is a partially enlarged sectional view of an electron ion supply source of an AC type plasma display device according to a fourth embodiment.

In the first to fourth embodiments, the electron ion supply source is provided separately from the display electrode.

In the first to fourth embodiments, an AC-type plasma display will be described, but only the electron ion supply source has an AC-type plasma display structure, and the display electrodes have a DC-type plasma display structure.
A type plasma display structure is also possible.

As shown in FIG. 1(A), the electron ion supply source of the first AC type plasma display device of the present application is located close to electrode 2 and transparent electrode 5, which serve as display electrodes, and electrode 8. Electrodes 9 are formed respectively, and the dielectric layer 3. It is constructed by forming dielectric layers 6, respectively.

Electrode 8. Glass beads lO are placed between the electrodes 9 as an insulator.
is placed.

As shown in FIG. 1(A), in the first embodiment, glass beads 10 are fixed to electrodes 8 and 9 through dielectric layers 3 and 6, respectively.

The method of fixing the glass beads IO in place is the AC
When using thick film printing technology as a manufacturing method for a type plasma display device, after printing the glass paste that forms the dielectric layer 3 or the dielectric layer 6, glass beads are coated on top of it in an organic binder, an organic solvent, etc. The mixed paste is printed, fired at the same time as the glass paste, and fixed to the dielectric layer.

Thereafter, the transparent substrate 4 and the insulating substrate 1 are bonded together using frit glass, and sealed by applying pressure and heating. At this time, the glass beads 10 are in contact with the electrode 8°9, and the dielectric layer 3
．． 8.

In addition, when forming a dielectric layer using thin film technology, it is possible to use glass beads whose surfaces are coated with amorphous low-melting glass in advance and fix the glass beads in the same manner as the above method. can.

In addition, the glass beads have an approximately uniform discharge space,
Characteristics such as discharge starting voltage can be stabilized. Furthermore, if the glass beads are fixed to the dielectric layer as described above, AC drive can be achieved.

Oscillation noise generated from the panel can be suppressed.

The insulator is not limited to a spherical shape such as a glass bead, but may also have a shape such as a glass rod, as described above.

Glass beads have the advantage of being able to be fixed at a desired position at once using thick film printing technology without having to place individual glass beads individually, resulting in a simple manufacturing process.

Note that the material is not limited to glass either.

At this time, the glass beads lO are connected to the dielectric layer 3.6 and the electrodes 8.6 and 8.6, respectively. Although it is fixed to the electrode 9 to constitute an electron ion source, it is not limited to this form, and the second to fourth embodiments show examples of other electron ion sources. With such a configuration as well, effects such as a substantially concave shape can be obtained. The second to fourth embodiments have the same constituent members as the first embodiment, so only the different parts will be described.

As shown in FIG. 1(B), the second embodiment has a dielectric layer 3,
A glass bead IO is sandwiched between 6.

In such a configuration, glass beads 10 are fixed to one substrate, the sealing temperature of the frit glass is lowered by a certain value or more than the melting temperature of the dielectric layer, and the space between the dielectric layers is maintained at the size of the glass beads. It can be made by

As shown in FIG. 1(C), in the third embodiment, glass beads 10 are fixed to only one substrate, and there is a certain distance between the dielectric layer 6 and the glass beads 10. It is provided.

Such a structure can be produced by fixing the glass beads 10 on the dielectric layer 3 and then maintaining the distance between the dielectric layers to be equal to or larger than the size of the glass beads.

As shown in FIG. 1CD), in the fourth embodiment, glass beads 10 are fixed to the dielectric layer 3J of one of the substrates.
Glass beads 10 are in contact with electrodes 9.

Such a structure can be produced by fixing the glass beads 10 to the dielectric layer 3t and then maintaining the space between the dielectric layer 8 and the electrode 9 to the size of the glass beads.

Hereinafter, a specific example of the AC type plasma display device of the first aspect of the present application will be described. Here, the case of the first embodiment will be explained as an example.

Glass beads 10 with a diameter of about 150 ILm are connected to electrodes 8.9
The above AC type plasma display device was manufactured by installing NeAr gas (containing 0.2% Ar) between the
mm Hg was enclosed. At this time, the discharge starting voltage of the display electrode was 200 to 220V, but the discharge starting voltage near the glass beads was 160"l80V.

2(A) to 2(D) are explanatory diagrams showing the second AC type plasma display device of the present application, and FIG. 2(A) is a schematic cross section showing the AC type plasma display device of the fifth embodiment. Figures 2(B) to 2(D) are the sixth embodiment.
FIG. 7 is a partially enlarged cross-sectional view of an electron ion supply source of an AC type plasma display device according to an eighth embodiment.

In the sixth to eighth embodiments, an electron ion supply source is provided in the display electrode.

As shown in FIG. 2(A), in the fifth embodiment, a dielectric layer 3 and a dielectric layer 6 are formed on an electrode 2 and a transparent electrode 5, which serve as display electrodes, respectively. Electrode 2. Glass beads 10 are placed between the transparent electrodes 5 as an insulator. At this time, the glass beads l<) are connected to the dielectric layer 3.6 and the electrodes 2.6, respectively.
It is fixed to the transparent electrode 5.

The method for fixing the glass beads IO in a predetermined position can be carried out in the same manner as in the first embodiment described above.

Note that the sixth to eighth embodiments are shown in FIGS. 2(B) to (D).
As shown in FIG. 2, this embodiment is the same as the second to fourth embodiments of the AC type plasma display device of the first aspect of the present application, except that an electron ion source is formed in the display electrode portion, so the description thereof will be omitted.

Hereinafter, a specific example of the AC type plasma display device according to the second aspect of the present application will be described. Here, the case of the fifth embodiment will be explained as an example.

The above AC type plasma display device was fabricated by installing glass beads lO with a diameter of about 150 pm between the display electrodes, and NeAr gas (containing 0.2% Ar) was heated to 200 m
m Hg was enclosed. At this time, as in the first example, the discharge starting voltage of one display electrode was 200 to 220V, but the discharge starting voltage near the glass beads was 160 to 180V.
It was v.

[Effects of the Invention] As described above in detail, according to the first plasma display device of the present application, electrodes independent of the display electrodes are formed on two substrates, and a dielectric layer is further laminated, By providing an insulator between the dielectric layers or between the dielectric layer and the electrode on the side where the dielectric layer is not aHj, an electron ion supply source is configured, and the firing voltage is lower than that of the one display electrode. First, the electron ion supply source is discharged, and then the electron ions are supplied to the display electrode, thereby reducing the discharge delay.

According to the second plasma display device of the present application, a separate independent electrode is not provided, and a portion between the dielectric layers on the display electrode or between the dielectric layer and the electrode on the side where the dielectric layer is not laminated. By providing an insulator in a portion, a portion of the display electrode can be used as an electron ion supply source, simplifying the configuration, reducing loss of supplied electron ions, and further reducing discharge delay.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A to 1D are explanatory diagrams showing the first AC type plasma display device of the present application. FIGS. 2(A) to 2(D) are explanatory diagrams showing a second AC type plasma display device of the present application. FIG. 3 is an exploded view of an example of an AC type plasma display device, and FIG. 4 is a partial sectional view thereof. l: insulating substrate, 2: electrode, 3.6: dielectric layer, 4: transparent substrate, 5: transparent electrode, 7: frit glass, 8, 9: electrode, lO Ni glass beads. Agent Patent Attorney Seki Yamashita Figure 1 (D) Figure 2 Figure 3, 15

Claims (4)

[Claims] (1) Two substrates having display electrodes provided on each substrate surface are faced to each other at a constant distance with the display electrode forming surface being the inner surface, and a discharge medium used for discharge light emission is enclosed and hermetically sealed. In the plasma display device which is stopped, an electrode independent from the display electrode is formed on the two substrates, and a dielectric layer is laminated on one or both of the independent electrodes, and a dielectric layer is formed between the dielectric layers or the dielectric layer is laminated on one or both of the independent electrodes. A plasma display device characterized in that an electron ion supply source is configured by providing an insulator between the body layer and the electrode on the side on which the dielectric layer is not laminated. (2) Two substrates having display electrodes provided on each substrate surface are faced to each other at a constant distance with the display electrode forming surface being the inner surface, and a discharge medium used for discharge light emission is enclosed and hermetically sealed. In the plasma display device which is stopped, a dielectric layer is laminated on one or both of the display electrodes provided on the substrate surface, and a part between the dielectric layers on the display electrode or between the dielectric layers is laminated. A plasma display device characterized in that an electron ion supply source is constituted by providing an insulator between the electrodes on the non-stacked side. (3) The plasma display device according to claim 1 or 2, wherein the insulator is a glass bead or a glass rod. (4) The plasma display device according to claim 1 or 2, wherein the insulator is fixed to one or both of the two substrates by a dielectric layer.