JPH01264138A - Ac type plasma display device - Google Patents

Abstract

PURPOSE:To reduce the discharge starting voltage than a display electrode and reduce the discharge delay by forming a display electrode and independent electrodes on two substrates and constituting an electron ion feed source. CONSTITUTION:An independent electrode 8 is formed near an electrode 2, a transparent dielectric layer 3 or one with the desired color is provided on the electrode 2. A transparent electrode 5 made of ITO or tin oxide is likewise provided on a transparent substrate 4 made of glass or the like and serving as a display substrate to form the display mode facing the electrode 2, an independent electrode 9 is formed near this transparent electrode 5, a transparent dielectric layer 6 is provided on the transparent electrode 5. When the electrodes 8 and 9 independent from the display electrode are provided and the voltage is applied across the independent electrodes, the discharge starting voltage of the independent electrodes is reduced than the display electrode section laminated with the dielectric layers 3 and 6 performing the intermittent discharge. 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 an AC type plasma display device, and particularly to an AC type plasma display device, which has display electrodes provided on each substrate surface and further has a dielectric layer laminated thereon. The present invention relates to an AC type plasma display device in which the substrates are opposed to each other at a constant distance with the display electrode forming surface as the inner surface, and a discharge medium used for discharge light emission is enclosed and hermetically sealed.

[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. In order to improve this discharge delay, it is effective to supply electrons and ions to the discharge space in advance.

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

As a result of intensive research into the structure of a plasma display that can reduce the discharge starting voltage, the inventors of the present invention found that in an AC type plasma display, an electrode is provided independent of the display electrode, and a voltage is applied between the independent electrodes. Then, it was discovered that the discharge starting voltage is lower in an independent electrode section than in a display electrode section in which dielectric layers are laminated to perform one intermittent discharge, and this has led to the present invention.

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

[Summary of the Invention] The AC type plasma display device of the present invention has display electrodes provided on each substrate surface, and two substrates each having a dielectric layer laminated thereon, with the display electrode forming surface as the inner surface. In an AC type plasma display device that faces each other at a constant interval and is hermetically sealed by enclosing a discharge medium for discharge light emission, an electrode independent of the display electrode is formed on the two substrates; It is characterized by comprising an electron ion supply source.

[Function] The present inventors have discovered that 1 in an AC type plasma display.
When an electrode independent from the display electrode is provided and a voltage is applied between these independent electrodes, the discharge starting voltage is lower in the independent electrode section than in the display electrode section in which dielectric layers are laminated, which performs intermittent discharge. I found out.

The present invention takes advantage of this phenomenon and forms an electron ion supply source by forming an electrode independent of the display electrode on two substrates, lowers the discharge starting voltage than one display electrode, and first generates electrons. The ion source is discharged, and then electron ions are supplied to the display electrode to reduce the discharge delay.

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

FIG. 1 is a schematic sectional view showing an embodiment of an AC type plasma display device according to the present invention.

FIG. 2 is an exploded view of the AC type plasma display device, and FIG. 3 is a partial sectional view thereof.

As shown in FIGS. 2 and 3, a transparent electrode such as ITo, tin oxide, etc., or Ag is formed on an insulating substrate 1 made of glass, ceramic, etc., which serves as a rear substrate.

An electrode 2 made of AI, Ni, etc. is patterned and formed into a desired display form such as alphabetic characters, numbers, katakana, hiragana, kanji, symbols, 2 figures, etc., and an independent electrode 8 is formed close to this electrode 2. do. Furthermore, a transparent dielectric layer 3 or a dielectric layer 3 of a desired color is provided on the electrode 2.

Similarly, the IT
o. A transparent electrode 5 made of tin oxide or the like is formed and provided in the same display form so as to correspond to the electrode 2, and an independent electrode 9 is formed adjacent to this transparent electrode 5. Furthermore, transparent electrode 5
A transparent dielectric layer 6 is provided thereon. In addition, electric AI8.9
In consideration of stabilization of discharge characteristics and scattering of sputtered material, the film is formed of a metal film such as Al, Ag, or Ni that has good sputtering resistance.

The dielectric layer 3.6 is 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 and MgF2 are formed on the dielectric layer 3.6 for the purpose of lowering the voltage and increasing the lifespan.

A protective film of Ce1l is often laminated.

The insulating substrate 1 and the transparent substrate 4 are sandwiched between spacers to maintain a constant distance, and hermetically sealed with a frit glass 7. At this time, the electrode 2 and the transparent electrode 5, and the electrode 8 and the electrode 9 are arranged so that they face each other. will be placed in

The encapsulated radioactive medium includes Ne and Ar.

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

In such an AC type plasma display device,
The discharge starting voltage (Vl) of the discharge medium between electrode 8 and electrode 9
The above voltage is applied to start discharge and supply electron ions to the display electrode. At this time, when a voltage higher than the discharge starting voltage (v2) of the discharge medium is applied between the electrode 2 and the transparent electrode 5, the discharge delay is caused by electron ions supplied from the discharge space between the electrodes 8 and 9. Discharge occurs without any generation, and light is emitted.

The present inventors have discovered that the discharge starting voltage of the discharge medium between electrode 8 and electrode 9 (DC discharge) is lower than the discharge starting voltage of the discharge medium between electrode 2 and transparent electrode 5 (intermittent discharge). I found it. Therefore, the discharge starting voltage v1 is the discharge starting voltage ■2
The same voltage can be applied to electrodes 8 and 9.
Even if applied between electrode 2 and electrode 5, electrode 8 and electrode 9 start discharging, ', 't.
It can be a source of t-son ions.

Once discharge starts at the electrode 2 and the transparent electrode 5, the generated electrons and cations are attracted to the electrodes corresponding to the anode and cathode, respectively, and adhere to the respective dielectric layers, forming so-called wall charges. do. 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 starts again. In this way, once the discharge starts, if a constant AC drive voltage is applied, the discharge will continue intermittently.

When an AC type plasma display device having the configuration described above was manufactured, the following results were obtained.

Note that the sealed gas was 200 mm Hg of NeAr gas (containing 0.2% Ar). At this time, the discharge starting voltage of the display electrode was 200 to 220V, but the discharge starting voltage of the independent electrode was 190 to 210V.

[Effects of the Invention] As described above in detail, according to the AC type plasma display device of the present invention, electrodes independent of the display electrodes are formed on two substrates, and an insulator is placed between the electrodes. By providing an electron ion supply source, the discharge starting voltage is lowered than that of one display electrode, the electron ion supply source is first discharged, and then the electron ions are supplied to the display electrode, thereby reducing the discharge delay. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an embodiment of an AC type plasma display device according to the present invention. FIG. 2 is an exploded view of an example of an ACC type plasma display building, and FIG. 3 is a partial sectional view thereof. 1: Insulating substrate, 2: Electrode, 3.6: Dielectric layer, 4: Transparent substrate, 5: Transparent electrode, 7: Frit glass, 8, 9: Electrode, Attorney Patent attorney Tsumi Yamashita Figure 3, 5

Claims (2)

[Claims] (1) having display electrodes provided on each substrate surface;
Further, two substrates each having a dielectric layer laminated thereon are faced to each other at a constant distance with the display electrode forming surface facing inside, and a discharge medium for use in discharge light emission is encapsulated and hermetically sealed.
type plasma display device, characterized in that electrodes independent of the display electrodes are formed on the two substrates to constitute an electron ion supply source.
C type plasma display device. (2) The independent electrode is made of Al having good sputtering resistance;
The AC according to claim 1, formed of a metal film such as Ag or Ni.
type plasma display device.