JP2001222959A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel capable of reducing a writing discharge current, luminescence and power, keeping a long life and minimizing errors caused by the adjacent cells. SOLUTION: The plasma display panel serves in display in each cell utilizing the luminescence by gas discharge and its data electrode is provided with a projection to produce the writing discharge at the parts overlapped by the data electrode and scanning electrodes when viewed from the panel front to reduce the writing discharge region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an AC type plasma display panel used as a display device whose area can be easily increased.

[0002]

2. Description of the Related Art Plasma display panels (hereinafter referred to as PDs)
P) is classified into a DC type in which the electrodes are exposed to the discharge space and an AC type in which the electrodes are covered with a dielectric layer according to the operation method.

FIGS. 10 and 1 show the structure of an AC type PDP.
This will be described with reference to FIGS. 10 is an exploded perspective view, FIG. 11 is a cross-sectional view of FIG. 10 viewed from the direction A, FIG. 12 is a cross-sectional view of FIG. 10 viewed from the direction B, and FIG.
FIG. 2 is a plan view of the device viewed from the direction C. The PDP has the following structure in a space between two insulating substrates, that is, a front substrate 51 and a rear substrate 52. In addition, as the insulating substrate, for example, a glass substrate having a thickness of about 2 to 5 mm is used.

On the front substrate 51, tin oxide or indium tin oxide (ITO) is used as a main component.
A group of scanning electrodes 53 and a group of sustaining electrodes 54 which are transparent and have a film thickness of about 100 to 500 nm are arranged in parallel with each other. The group of scan electrodes 53 and the group of sustain electrodes 54 are collectively referred to as a row electrode group. Although not shown, a trace electrode made of a metal thin film such as silver, a multilayer thin film such as chromium / copper / chromium, or a metal thin film such as an aluminum thin film is provided on a part of the row electrode group to reduce wiring resistance. May be provided. The row electrode group is covered with a transparent dielectric layer 55a having a thickness of about 20 to 40 μm using a low melting point lead glass paste. The transparent dielectric layer 55a is smoothed by firing at a temperature higher than the softening point. Further, on the transparent dielectric layer 55a, a dielectric layer protection film 56 for protecting the transparent dielectric layer 55a is formed to a thickness of about 0.5 to 2 μm by vapor deposition or sputtering of MgO.

On the rear substrate 52, a group of data electrodes 57 arranged orthogonal to the group of row electrodes is formed. The group of data electrodes 57 is formed of silver or the like with a thickness of about 2 to 4 μm.
The data electrodes 57 are covered with a white dielectric 55b made of a thick film paste obtained by mixing a white pigment with low melting point lead glass. Titanium oxide powder or alumina powder is used for the white pigment. The thickness of the white dielectric 55b is about 5 to 40 μm. Further, on the white dielectric 55b, a phosphor 5 for converting ultraviolet light generated by the discharge into visible light is provided.
8 is applied. If the phosphor 58 is separately applied to each cell, for example, red, green and blue (RGB), which are three primary colors of light, a PDP for color display can be obtained. Screen printing or the like is used for film formation of each phosphor 58.

The discharge space 5 is provided between the transparent dielectric layer 55a on the front substrate 51 and the white dielectric 55b on the rear substrate 52.
Partitions 60 for securing cells 9 and separating cells are formed. As the partition wall forming method, a thick film printing, a sand blast method, or the like is used. After bonding the front substrate 51 and the rear substrate 52 and baking at 350 to 500 ° C., the inside of the discharge space 59 is evacuated, and He, N
A mixed gas of e, Ar, Kr, Xe, N ₂ , O ₂ , CO _2, etc. is sealed as a discharge gas at about 200 to 700 Torr.

Next, a plan view of the electrode structure in the color PDP shown in FIG. 10 is shown in FIG. In FIG. 14, the electrode structure of the color PDP has m scanning electrodes 53S _i (i =
, M) are formed in the row direction, and n data electrodes 57D _j (j = 1, 2,..., N) are formed in the column direction. One cell 61 is formed at the intersection. Sustain electrodes _{54C i (i = 1,2, ...} , m) is the scanning electrode _{S i} paired, they are parallel.

As an example of the cell size, for example, the partition 6
Pitch of 0 is 0.35 mm, the pitch of the scanning electrodes _{S i} is 1.05 mm, scan and sustain electrodes width 0.3 mm, the data electrode width there is a 0.15 mm. The gap between the scanning / sustaining electrodes (discharge side) is about 0.1 mm.

A driving method in the AC type PDP will be briefly described. In the AC type PDP, charges called wall charges are generated or erased on the dielectric layer 55 at the time of discharge. The presence or absence of discharge is determined by manipulating this wall charge. This operation of determining the presence or absence of a discharge is called writing, and the discharge performed at the time of writing is called a writing discharge. In many cases, the writing discharge is performed by simultaneously applying a voltage to the scanning electrode 53 and the data electrode 57 to cause the data electrode 5 to discharge.
Lighting and non-lighting pixels are selected according to the presence or absence of the data voltage applied to the pixel 7. The region where the write discharge occurs is the portion where the scan electrode 53 and the data electrode 57 overlap in FIG.

[0010]

However, when a write discharge is performed in the above-mentioned conventional PDP structure, a write discharge occurs in a portion where the scan electrode 53 and the data electrode 57 overlap when viewed from the front of the panel, and the scan electrode 53 is formed. And, wall charges are formed on the data electrodes 57. The superimposed voltage value due to the wall charges distinguishes a lit pixel and a non-lit pixel during the sustain discharge period. At this time, the wall charges actually required for the distinction are only the portions near the surface discharge gap.
However, since the write discharge mainly occurs in all the overlapping portions of the scanning electrode 53 and the data electrode 57, the conventional shape of the data electrode 57 extends to a portion on the scanning electrode 53 which is not necessary to distinguish between lighting and non-lighting. Wall charges had been formed. As described above, if the discharge occurs to an unnecessary portion, there is a problem that the current, light emission, and power required for writing become unnecessarily large.

Further, since the write discharge extends along the data electrode 57, the discharge extends to the vertically adjacent cell direction. As a result, the charged particles move to the vertically adjacent cells, and the vertically adjacent cells are erroneously lit.

Further, a phosphor 58 is provided on the data electrode 57.
Is applied, if the writing discharge area is large,
There is a problem that the deterioration of the phosphor 58 is accelerated and the life is shortened.

The present invention has been made in view of the above problems, and has as its object to reduce the writing current, light emission, and current, to have a longer life, and to provide a vertically adjacent pixel. Another object of the present invention is to provide a plasma display panel that can reduce the malfunction rate of the plasma display panel.

[0014]

According to a first aspect of the present invention, a row electrode is provided by arranging a scan electrode group and a sustain electrode group on one of two insulating substrates opposed to each other. A pair, a data electrode group is arranged on the other insulating substrate so as to intersect with the row electrode pair, an intersection of the row electrode pair and the data electrode corresponds to one pixel, and from the data electrode group,
A plasma display, comprising: forming a group of projections in a substrate surface; and causing writing discharge between the projections of the data electrode group and the scanning electrodes to distinguish between lighting and non-lighting of pixels. In the panel. Also,
The gist of the invention according to claim 2 is that a partition wall for separating a discharge region is formed on the data electrode region other than the protrusion, and the data electrode other than the protrusion is formed when viewed from the front of the panel. The plasma display panel according to claim 1, wherein the plasma display panel is hidden by a partition. The gist of the invention according to claim 3 is that, when viewed from the front substrate side, the end of the scan electrode on the surface discharge side gap side overlaps with the protrusion of the data electrode, and the surface of the scan electrode 3. The plasma display panel according to claim 1, wherein an end on a side other than a discharge gap side does not overlap with the protrusion of the data electrode. 4. The gist of the invention described in claim 4 is that the protrusion has a portion having a width larger than a width near a junction with the data electrode. A plasma display panel according to any one of the preceding claims. The gist of the invention according to claim 5 is that a scanning electrode group and a sustaining electrode group are arranged on one insulating substrate in which two insulating substrates are opposed to each other, and the scanning electrode group is arranged on the other insulating substrate. And a data electrode group is disposed so as to intersect with the sustain electrode group, a projection group is formed in the substrate surface from the data electrode group, and the scan electrodes separated by partition walls,
1 from the sustain electrode, the data electrode, and the protrusion.
A plasma display panel having a structure in which pixels are formed. The gist of the invention described in claim 6 is that the data electrode other than the protruding portion has a structure formed below a partition.
In the plasma display panel described in the above. Also,
The gist of the invention according to claim 7 is that, when viewed from the front substrate side,
The end of the scan electrode on the surface discharge side on the gap side and the projection of the data electrode overlap, and the end of the scan electrode on the side other than the surface discharge gap side does not overlap with the projection of the data electrode. 7. The plasma display panel according to claim 6, wherein the plasma display panel has a structure described below. The gist of the invention described in claim 8 is that the projection has a structure in which a portion having a width larger than the width near the junction with the data electrode is present. The present invention resides in the described plasma display panel.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION All the embodiments described below are based on the conventional AC type PDP mentioned above, that is,
Partition wall pitch 0.35 mm, scanning electrode pitch 1.05 m
m, scanning / sustaining electrode width 0.3 mm, data electrode width 0.1
5 mm, gap between scan and sustain electrodes (discharge side) 0.1 m
m cells. Therefore, when the cell size is increased due to a large screen, or when the cell size is reduced due to high definition, the cell size in the embodiment may be changed in accordance with the change in the size. Naturally, the materials and manufacturing method are the same as in the conventional example.

(First Embodiment) FIG. 1 is a diagram showing a first embodiment of the present invention. In FIG. 1, reference numeral 57 denotes a data electrode, 53 denotes a scanning electrode, 60 denotes a partition, and 61 denotes a range of one cell.

Describing the cell dimensions, the width of the data electrode 57 other than the protrusion is about 0.03 to 0.06 mm, and the protrusion of the data electrode 57 has a data electrode protrusion width of 1 mm.
1 is about 0.1 to 0.25 mm, and the length 12 of the data electrode protrusion is about 0.15 to 0.25 mm.

As compared with the conventional structure, the present invention is characterized in that a projection is formed from the data electrode 57, and the projection of the data electrode 57 and the scanning electrode 53 are viewed from the front of the panel. This is to cause writing discharge in the overlapping portion. Furthermore, the area of the portion where the write discharge occurs (that is, the area where the scanning electrode 53 and the data electrode 57 overlap when viewed from the front of the panel) is made smaller than the area of the portion where the conventional write discharge occurs.

With such a data electrode structure,
The following effects can be obtained.

(1) Since the overlapping area between the scanning electrode 53 and the data electrode 57 is reduced, the write discharge region is reduced, and the peak value of the write current can be reduced. As a result, the peak current flowing through the data driver can be suppressed, and the cost of the data driver can be reduced.

Further, as in the present embodiment, it is preferable to dispose the portion other than the projection of the data electrode 57 under the partition wall 60. The following effects are obtained.

(2) Since the write discharge does not occur except at the protrusions of the data electrode 57, the write discharge area is further reduced. Thus, the peak value of the write current can be further reduced.

(3) Since the data electrodes 57 other than the projections of the data electrodes 57 are arranged below the partition walls 60, the area of the phosphor 58 not on the data electrodes 57 increases. As a result, the charged particles are less likely to jump directly into the phosphor 58, so that deterioration of the phosphor 58 can be avoided,
Life is increased.

Furthermore, when viewed from the front of the panel, it is preferable that the overlapping portion of the projection of the data electrode 57 and the scanning electrode 53 be as close as possible to the vicinity of the surface discharge gap.
Specifically, as in the present embodiment, when viewed from the front substrate 51 side, the surface-discharge-side gap-side end of the scan electrode 53 and the projection of the data electrode 57 are overlapped, and the scan electrode 53 The other end of the surface discharge gap and the data electrode 5
The projections 7 should not overlap. With such a structure, the following effects are produced.

(4) A write discharge mainly occurs in a portion where the scan electrode 53 and the data electrode 57 overlap. Therefore, the wall charges formed on the scanning electrode 53 are also formed in the overlapping portion of the scanning electrode 53 and the data electrode 57. Therefore, with the data electrode structure of the present invention, it is possible to control the wall charge distribution on the scan electrode 53 formed by the write discharge. Specifically, as in the present embodiment, data electrode 5
By moving the projection 7 toward the center of the cell, the wall charge on the scanning electrode 53 formed by the write discharge is reduced.
It can be formed only in the vicinity of the surface discharge gap. As a result, an electric field can be formed concentrated near the surface discharge gap. That is, it is easy to shift to the sustain discharge, and as a result, it is possible to suppress an increase in the defective rate such as non-lighting of the selected cell.

(5) Since a write discharge is generated only in the vicinity of the surface discharge gap of the scan electrode 53 to generate wall charges, the influence of the write discharge or the influence of the wall charges is not easily transmitted to vertically adjacent cells. As a result, defects such as unintended lighting / non-lighting of the vertically adjacent pixels can be suppressed.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIG. The same portions as those already described in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.

The present embodiment is the same as the first embodiment except that the width of the tip of the protrusion from the data electrode 57 is smaller than the width near the junction with the data electrode 57.

In this embodiment, 0.1 to 0.
With respect to the data electrode protrusion 11 having a width of 25 mm, the width of the bonding portion is about half of that, that is, about 0.05 to 0.15 mm.

With such a structure, the writing discharge is prevented from spreading to the vicinity of the partition wall 60, and the wall charges generated in the vicinity of the partition wall 60 affect pixels adjacent to the partition wall 60. prevent. As a result, it is possible to prevent defects such as unselected adjacent cells being lit.

In the present embodiment, the junction is located closest to the sustain electrode 54 (not shown).
Such an arrangement may be used.

(Third Embodiment) A third embodiment of the present invention will be described with reference to FIG. The same portions as those already described in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted. This embodiment is almost the same as the first embodiment,
The difference is that the side end of the sustain electrode 54 (not shown) of the protrusion of the data electrode 57 extends below the sustain electrode 54.

More specifically, in the first embodiment, the width 11 of the data electrode projection is about 0.1 to 0.25 mm, but in the present embodiment, it is 0.25 to 0.5 m.
m in the direction of the sustain electrode 54.

With such a structure, the write discharge extends to the sustain electrode 54 side, so that not only the facing discharge but also the surface discharge easily occurs in the writing process, and as a result, there is an effect that the transition to the sustain discharge is facilitated. .

(Fourth Embodiment) A fourth embodiment of the present invention will be described with reference to FIG. The same portions as those already described in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted. This embodiment is almost the same as the second embodiment,
The difference is that the end of the projection of the data electrode 57 on the sustain electrode 54 (not shown) side extends below the sustain electrode 54.

With such a structure, the write discharge extends to the sustain electrode 54 side, so that not only a facing discharge but also a surface discharge is likely to occur in the writing process, and as a result, it is easy to shift to the sustain discharge. is there.

In the present embodiment, the joint is located closest to the sustain electrode 54, but may be arranged as shown in FIG.

In the first to fourth embodiments, the tip is rectangular, but any shape may be used as long as it has a similar effect.
For example, it may be a round shape as shown in FIG. 7, a tapered shape as shown in FIG. 8, or a rounded shape as shown in FIG.

It should be noted that the present invention is not limited to the above embodiments, and it is clear that each embodiment can be appropriately modified within the scope of the technical idea of the present invention. Further, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to numbers, positions, shapes, and the like suitable for carrying out the present invention. In each drawing, the same components are denoted by the same reference numerals.

[0040]

Since the present invention is configured as described above, the following effects can be obtained. First, the first effect is that the peak current flowing to the data driver can be suppressed without increasing the defective rate such as the non-lighting of the selected cell or the lighting of the non-selected cell, leading to a reduction in the cost of the data driver. Furthermore, since the area of the phosphor that is not on the data electrode increases, deterioration of the phosphor can be avoided, and the life can be extended.

A second effect is that the area where the write discharge occurs is smaller than in the prior art, and the current and light emission required for the write discharge can be reduced.

The third effect is that, since the data electrodes other than the projections are formed below the partition walls, the write discharge does not extend along the data electrodes, and the write discharge region becomes smaller, resulting in a peak write current. The value can be further reduced.

The fourth effect is that, since the projection from the data electrode is present in the vicinity of the surface discharge gap, the write discharge can be limited to the vicinity of the surface discharge gap. Wall charges can be generated only in the vicinity, and it is easy to shift to sustain discharge.

A fifth effect is that the size of the portion of the phosphor that is not on the electrode is also large, so that the charged particles are less likely to damage the phosphor, and as a result, the deterioration of the phosphor can be reduced.

The sixth effect is that, since the width of the joint between the projection and the data electrode is smaller than the other width of the projection, writing discharge is less likely to occur near the partition,
As a result, wall charges are less likely to be formed on the scanning electrodes in the vicinity of the partition walls, so that a malfunction due to the wall charge superimposed voltage formed in the horizontally adjacent cell does not occur.

[Brief description of the drawings]

FIG. 1 is an electrode arrangement diagram for explaining a first embodiment of the present invention.

FIG. 2 is an electrode arrangement diagram for explaining a second embodiment of the present invention.

FIG. 3 is an electrode arrangement diagram for explaining a modification of the second embodiment of the present invention.

FIG. 4 is an electrode arrangement diagram for explaining a third embodiment of the present invention.

FIG. 5 is an electrode arrangement diagram for explaining a fourth embodiment of the present invention.

FIG. 6 is an electrode arrangement diagram for explaining a modification of the fourth embodiment of the present invention.

FIG. 7 is a data electrode shape diagram for explaining one of modifications of the embodiment of the present invention.

FIG. 8 is a data electrode shape diagram for explaining one of modifications of the embodiment of the present invention.

FIG. 9 is a data electrode shape diagram for explaining one of modifications of the embodiment of the present invention.

FIG. 10 is a perspective sectional view of a part of the plasma display panel.

11 is a cross-sectional view of the plasma display panel when FIG. 10 is viewed from a direction A.

FIG. 12 is a cross-sectional view of the plasma display panel when FIG. 10 is viewed from a direction B.

FIG. 13 is a sectional view of the plasma display panel when FIG. 10 is viewed from a direction C.

FIG. 14 is a schematic plan view showing a discharge cell and electrode configuration of the plasma display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Data electrode protrusion part width 12 ... Data electrode protrusion part length 51 ... Front substrate 52 ... Back substrate 53 ... Scan electrode 54 ... Sustain electrode 55 ... Dielectric layer 55a ... Transparent dielectric layer 55b ... White dielectric 56 ... Dielectric Layer protective film 57 Data electrode 58 Phosphor 59 Discharge space 60 Partition wall 61 1 cell

Claims (8)

[Claims] A row electrode pair is formed by arranging a scan electrode group and a sustain electrode group on one of two insulating substrates opposed to each other, and forming the row electrode pair on the other insulating substrate. A data electrode group is arranged so as to intersect, an intersection of the row electrode pair and the data electrode corresponds to one pixel, and a projection group is formed in the substrate surface from the data electrode group. A plasma display panel, characterized in that lighting or non-lighting of a pixel is distinguished by causing a writing discharge between the projection and the scanning electrode. 2. A partition for separating a discharge region is formed on the data electrode region other than the protrusion, and the data electrode other than the protrusion is hidden by the partition when viewed from the front of the panel. The plasma display panel according to claim 1, wherein: 3. An end portion of the scan electrode on the surface discharge side gap side and the projection of the data electrode overlapped with each other and not on the surface discharge gap side of the scan electrode as viewed from the front substrate side. 3. The plasma display panel according to claim 1, wherein the projection of the data electrode does not overlap with the projection of the data electrode. 4. The plasma display according to claim 1, wherein the projection has a portion having a width larger than a width near a junction with the data electrode. panel. 5. A scanning electrode group and a sustaining electrode group are arranged on one insulating substrate with two insulating substrates facing each other, and intersect with the scanning electrode group and the sustaining electrode group on the other insulating substrate. A data electrode group is arranged as described above, a projection group is formed in the substrate surface from the data electrode group, and one pixel is formed from the scanning electrode, the sustain electrode, the data electrode, and the projection separated by a partition. A plasma display panel characterized by having a modified structure. 6. The semiconductor device according to claim 5, wherein said data electrode other than said protrusion is formed under a partition.
The plasma display panel according to item 1. 7. An end portion of the scan electrode on the surface discharge side gap side and the projection of the data electrode overlapped with each other and not from the surface discharge gap side when viewed from the front substrate side. 7. The structure according to claim 6, wherein said projections of said data electrode do not overlap with each other.
The plasma display panel according to item 1. 8. The plasma display panel according to claim 7, wherein the projection has a structure in which a portion having a width larger than a width near a junction with the data electrode is present.