CN1204831A

CN1204831A - Plasma display device

Info

Publication number: CN1204831A
Application number: CN 98108430
Authority: CN
Inventors: 朴得一
Original assignee: Samsung Electron Devices Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 1997-07-04
Filing date: 1998-05-15
Publication date: 1999-01-13

Abstract

A plasma display device comprises a rear substrate, a plurality of first electrodes formed on the rear substrate in a predetermined pattern, a dielectric layer formed on the rear substrate where the first electrodes are to be embedded, a plurality of second electrodes formed on the dielectric layer to be orthogonal with respect to the first electrodes, and at least one auxiliary electrode formed between the second electrodes.

Description

Plasma display device

The present invention relates to plasma display device, relate in particular to the plasma display device that utilizes surface-discharge.

Each pixel of surface-discharged plasma display device is provided with scan electrode and faces the public electrode of addressing electrode, between addressing electrode and scan electrode address discharge takes place, and between scan electrode and public electrode continuous discharge takes place.

Structure with reference to this surface-discharged plasma display device of figure 1 brief description.As shown in Figure 1, on substrate 2, form X-axis electrode 3, on X-axis electrode 3 and substrate 2, form first dielectric layer 4 with predetermined pattern.On first dielectric layer 4, form perpendicular to the Y-axis electrode 5 of X-axis electrode 3 and be parallel to electrode 5 and have preset width and the weld zone electrode 6 of predetermined length.Weld zone electrode 6 is connected electrically to X-axis electrode 3.In addition, second dielectric layer 7 is positioned on first dielectric layer 4 that is provided with Y-axis electrode 5 and weld zone electrode 6.

When

electrode

3 and 5 two ends add predetermined voltage, between weld zone electrode 6 and Y-axis electrode 5, discharge.Yet, because weld zone electrode 6 is connected electrically to X-axis electrode 3 via the protruding 6a that passes a hole in first dielectric layer 4, so the manufacturing process of this device is difficult to.

With reference to figure 2, another embodiment of conventional surface-discharged plasma display device comprises back substrate 10, at the addressing electrode 11 that forms on the back substrate 10, be provided with the dielectric layer 12 that forms on the substrate 10 of addressing electrode 11, keep arcing distance and prevent the partition wall 13 of the cross (talk) (cross-talk) between the pixel, scan electrode 14 and the public electrode 15 of waiting to install to the preceding substrate 16 on the back substrate 10 and on the lower surface of preceding substrate 16, alternately forming in being used to of forming on the dielectric layer 12.In addition, in the discharge space that partition wall 13 is limited, form fluorescent material layer 17, on the lower surface of the preceding substrate 16 that is provided with scan electrode 14 and public electrode 15, form dielectric layer 18.Fill predetermined discharge gas in the discharge space between back substrate 10 and preceding substrate 16.

As shown in Figure 3, when when

electrode

14 and 15 two ends add predetermined voltage, ion in the discharge gas is concentrated to dielectric layer 12, takes place to trigger discharge between addressing electrode 11 and public electrode 15, causes forming charged particle at the lower surface place of preceding substrate 16 dielectric layers 18.In the case, when according to a vision signal when scan electrode 14 and public electrode 15 two ends add predetermined voltage (V), generation continuous discharge in discharge space (S).In this moment, in gas, form plasma, correspondingly radiation ultraviolet ray.Then, luminous by this ultraviolet ray excited fluorescent material layer.

Yet above-mentioned plasma display device has following problem.

At first, be used for the relative broad in interval between addressing electrode 11 and the scan electrode 14, must add the high pressure of about 300V at public electrode 15 and addressing electrode 11 two ends, to realize triggering discharge.Therefore, because the aging effect of operation with high pressure, make that serviceable life of display board of this device is shorter relatively.

Secondly, must add voltage at scan electrode and public electrode two ends for continuous discharge, so need complex drive mechanism and circuit.In addition, because the electrostatic capacitance between scan electrode 14 and the public electrode 15 is less relatively, can not form suitable energetic plasma, thereby this display device can not be realized appropriate brightness.In addition, owing in the space that is lower than scan electrode 14 and public electrode 15, continuous discharge occurs, so need partition wall 13 to prevent optical interference between the pixel.

In order to overcome the above problems, an object of the present invention is to provide a kind of plasma display device, wherein initial sparking voltage is lower and can obtain suitable ultraviolet radiation and come excitation fluorescent material.

Correspondingly, in order to realize above purpose, provide a kind of plasma display device, it comprises: back substrate; A plurality of first electrodes that on back substrate, form with predetermined pattern; On the back substrate that will bury first electrode, form dielectric layer; On dielectric layer, form will with a plurality of second electrodes of the first electrode quadrature; And at least one auxiliary electrode that between second electrode, forms,

Here, electrode is preferably electric unsteady.

In addition, plasma display device also can comprise install to back substrate with preceding substrate that forms discharge space and the fluorescent material layer that can form on the lower surface of preceding substrate; And the partition wall of the qualification discharge space that between preceding substrate and dielectric layer, forms.

Here, each partition wall that forms in each second electrode both sides is parallel to second electrode.In addition, partition wall can not be superimposed upon on first electrode and can be parallel with first electrode.

According to another aspect of the present invention, a kind of plasma display device comprises: back substrate; A plurality of first electrodes that on back substrate, form with predetermined pattern; The dielectric layer that forms on the back substrate of first electrode will be buried; Be formed on the dielectric layer to form the partition wall of discharge space with lattice shape; A plurality of second electrodes of a discharge space that is exposed to partition wall respectively and is limited; And the auxiliary electrode layer that on the arbitrary portion of partition wall, forms, its a part of part is exposed to discharge space.

Here, the both sides of auxiliary electrode layer are preferably formed as on partition wall or descend, and its exposed at both sides is in discharge space.

By with reference to the accompanying drawings preferred embodiment of the present invention being described in detail, above purpose of the present invention and advantage will be become obviously, wherein:

Fig. 1 is the partial, exploded perspective view that a conventional surface-discharged plasma display device part is shown;

Fig. 2 is exploded and the local cut-away, perspective view that another conventional surface-discharged plasma display device part is shown;

Fig. 3 is sectional view embodiment illustrated in fig. 2 but not exploded view;

Fig. 4 is the partial, exploded perspective view that illustrates according to an embodiment part of plasma display device of the present invention;

Fig. 5 is the partial, exploded perspective view that illustrates according to another example of plasma display device auxiliary electrode of the present invention;

Fig. 6 and 7 illustrates the partial, exploded perspective view that forms according to the partition wall of plasma display device of the present invention respectively;

Fig. 8 is the partial, exploded perspective view that illustrates according to another embodiment part of plasma display device of the present invention;

Fig. 9 is the partial, exploded perspective view that illustrates according to another embodiment part of plasma display device of the present invention; And

Figure 10 is the sectional view that the line X-X along Fig. 7 is got.

With reference to the Fig. 4 that illustrates according to plasma display device of the present invention, on back substrate 41, form first electrode 42 of strip, on the back substrate 41 that is provided with first electrode 42, form dielectric layer 43.On dielectric layer 43, form strip second electrode 44 with first electrode, 42 quadratures.In addition, between second electrode 44, form at least one auxiliary electrode 61 that is parallel to second electrode 44.Auxiliary electrode 61 is electric unsteady.In addition, as shown in Figure 5, form auxiliary electrode 61 ' discontinuously, make it to have predetermined width and predetermined length.In the case, the position that is preferably in corresponding to first electrode 42 forms auxiliary electrode 61 '.

On dielectric layer 43, form the diaphragm 55 that MgO constitutes.In addition, though not shown, diaphragm 55 be can form in such a manner, thereby second electrode 44 and auxiliary electrode 61 buried.The back substrate 41 that is provided with first and

second electrodes

42 and 44, dielectric layer 43 and auxiliary electrode 61 bonds to the preceding substrate 50 that is provided with fluorescent material layer 51, blanketing gas in the discharge space between back substrate 41 and preceding substrate 50.

In addition, as shown in Figure 6, between back substrate 41 and preceding substrate 50, form the partition wall 81 adjacent and parallel with first electrode 44.As shown in Figure 7, when forming auxiliary electrode 61 ' discontinuously, be preferably in and form the partition wall 82 that is parallel to first electrode 42 between the auxiliary electrode 61 '.

In the operation of the present embodiment of plasma display device with said structure, when adding an AC voltage between first electrode 42 and second electrode 44 (Fig. 7), the sliding discharge that takes place as shown in figure 10 between first and

second electrodes

42 and 44 promptly triggers discharge.

In the case, in case the 2nd AC voltage that is higher than an AC voltage is added to the two ends of second electrode 44 and auxiliary electrode 61 ' according to a vision signal, then increased the scope of sliding discharge, and between second electrode 44 and auxiliary electrode 61 ', main discharge has taken place.Electric current during main discharge flow through successively first electrode 42, dielectric layer 43, second electrode 44, discharge space (S), auxiliary electrode 61 ' and dielectric layer 43 and flow back into first electrode 42.At the polarity chron of putting upside down first electrode 42 and second electrode 44 respectively, the flow path of electric current is also put upside down.

At this moment, gas is ionized, thereby forms plasma between second electrode 44 and auxiliary electrode 61 ', result, the ultraviolet photon excitation fluorescent material layer of emission.Then, the fluorescent material layer visible emitting that is excited and illuminate pixel.

Another embodiment of foundation plasma display device of the present invention as shown in Figure 8.Here, with previous figure in identical label represent similar parts.As shown in Figure 8, on the back substrate 41 that is provided with first electrode 42 and dielectric layer 43, form strip second electrode 44 that intersects with first electrode 42.In addition, it is high and be parallel to the strip auxiliary electrode 62 of second electrode 44 to form the height of aspect ratio second electrode 44 between second electrode 44.Auxiliary electrode 62 is electric unsteady.In addition, form with auxiliary electrode 62 quadratures and limit the partition wall (not shown) of discharge space with lattice shape.

With reference to the Fig. 9 that illustrates according to another embodiment of plasma display device of the present invention, on the back substrate 41 that is provided with first electrode 42 and dielectric layer 43, form strip second electrode 44 with first electrode, 42 quadratures.The appropriate section that form to limit partition wall 70, the second electrodes 44 of discharge space with lattice shape on dielectric layer 43 is exposed to each discharge space.On partition wall 70, form auxiliary electrode layer 63, so that the exposed at both sides of auxiliary electrode layer 63 is in corresponding discharge space.In addition, also can below partition wall, form auxiliary electrode layer 63.Here, auxiliary electrode becomes 63 not have electrical couplings to second electrode 44 but electric unsteady.

Though form partition wall 70 with lattice shape in the present embodiment, be not limited thereto, can such as honeycomb have pentagon, hexagon or similarly various structures such as other structures form partition wall 70.

According to the plasma display device of present embodiment to discharge with identical as mentioned above mode.

In the above-described embodiments, can be by forming auxiliary electrode, first electrode and second electrode with predetermined pattern vapor deposition conducting metal or indium tin oxide (ITO).In addition, can utilize wiring for first and second electrodes.

Have the following advantages according to plasma scope of the present invention.

The first, utilize the sliding discharge that on dielectric layer, occurs by first and second electrodes, can reduce the voltage of initial discharge.

The second, because dielectric layer is between first electrode and second electrode, so sliding discharge can easily take place.

The 3rd, be enough to carry out continuous discharge owing to can increase to addressing voltage, rather than add a voltage, so can simplify the driving mechanism and the circuit of this device at second electrode and auxiliary electrode two ends.Electrostatic capacitance between first and second electrodes increases, thereby can form the plasma of high level.This helps improving the brightness of this device.

The 4th, because the height height of aspect ratio second electrode of auxiliary electrode so auxiliary electrode can play the effect of partition wall, thereby can be simplified the structure of this device.

The 5th, can regulate discharge current and voltage by changing the auxiliary electrode and second distance between electrodes.

The 6th, utilize auxiliary electrode, can increase the electric capacity of discharge, cause increasing the brightness of this device.

Though describe preferred embodiment of the present invention with reference to the accompanying drawings for signal, the one skilled in the art should understand can carry out various modifications within the spirit and scope of the present invention.

Can be the planar light source of the plasma display device of the present invention that utilizes above-mentioned discharge as liquid-crystal apparatus (LCD) or similar device.

Claims

1. plasma display device comprises back substrate, at first electrode, the dielectric layer that forms that form with predetermined pattern on the back substrate and that form and the second electrode first electrode quadrature on dielectric layer on the back substrate that will bury first electrode,

It is characterized in that,

Plasma display device is included at least one auxiliary electrode that forms between second electrode.

2. plasma display device as claimed in claim 1 is characterized in that auxiliary electrode is electric unsteady.

3. plasma display device as claimed in claim 1 is characterized in that forming discontinuously auxiliary electrode, makes it to have preset width and predetermined length and is parallel to second electrode.

4. plasma display device as claimed in claim 1 is characterized in that also comprising:

Install on the back substrate to form the preceding substrate of discharge space, wherein on the lower surface of preceding substrate, form fluorescent material layer; And

The partition wall of the qualification discharge space that between preceding substrate and dielectric layer, forms.

5. plasma display device as claimed in claim 4 is characterized in that forming the partition wall that is parallel to second electrode in the both sides of each second electrode.

6. plasma display device as claimed in claim 4 is characterized in that forming discontinuously auxiliary electrode, makes it to have preset width and predetermined length and is parallel to second electrode.

7. plasma display device as claimed in claim 6 is characterized in that forming the partition wall that is parallel to first electrode between auxiliary electrode.

8. plasma display device as claimed in claim 1 is characterized in that forming than the high auxiliary electrode of second electrode with respect to back substrate.

9. plasma display device as claimed in claim 1 is characterized in that forming diaphragm on one of dielectric layer or second electrode.

10. plasma display device, comprise back substrate, first electrode that forms with predetermined pattern on the back substrate, the dielectric layer that on the back substrate that will bury first electrode, forms, on dielectric layer with lattice shape form with the partition wall that forms discharge space and form second electrode that is exposed to a discharge space that limits by partition wall respectively

It is characterized in that,

Plasma display device is included in the auxiliary electrode layer that the part that forms in the arbitrary portion of partition wall is exposed to discharge space.

11. plasma display device as claimed in claim 10 is characterized in that forming auxiliary electrode layer on partition wall, so that its exposed at both sides is in discharge space.

12. plasma display device as claimed in claim 10 is characterized in that forming auxiliary electrode layer below partition wall, so that its exposed at both sides is in discharge space.

13. plasma display device as claimed in claim 10 is characterized in that auxiliary electrode is electric unsteady.

14. plasma display device as claimed in claim 10 is characterized in that forming diaphragm on one of dielectric layer or second electrode.