JPS63200433A - Plasma display panel - Google Patents

Abstract

PURPOSE:To make it possible to obtain a plasma display panel with a larger range of operating voltage suitable for the face selection drive method by making a layer of a group of insulating matter partition walls between scanning electrodes with a strong cross talk thicker than a layer of a group of insulating matter partition walls between data electrodes with a week cross talk. CONSTITUTION:A layer of a group of insulating matter partition walls 7 is formed to be 75mum thick, and a layer of a group of insulating matter partition walls 8 is formed to be 25mum thick to have different thickness from each other. As an example of forming them, the group of insulating matter partition walls 8 may be formed to have thickness of 25mum by screen printing once and the insulating matter partition walls 8 to be 75mum thick by screen printing three times easily. By making the insulating matter partition walls 7 thicker for scanning directions with a stronger cross talk and the insulating matter partition walls 8 thinner between data electrodes for which cross talk is weaker, a plasma display panel with reduced cross talk can be realized. Balance of thickness can be changed depending on the voltage to be applied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plasma display panel, and more particularly to a structure of an insulator barrier rib for improving the operating voltage margin of a plasma display panel.

[Conventional technology]

Conventionally, AC refresh type plasma display panels have a unique structure of insulator partition walls.
This insulator barrier rib is used as a spacer to prevent crosstalk between adjacent cells and to maintain a constant discharge gap. The insulator partition wall of a conventional plasma display panel will be explained with reference to FIG.

FIG. 3 is a cross-sectional view of a conventional plasma display panel, in which 1 is a front substrate, 2 is a rear substrate, 3 is a transparent electrode such as SnO□ formed on the inner surface of the front substrate 1, and 4 is a transparent electrode of the rear substrate 2. For example, a silver electrode formed on the inner surface. The transparent electrode 3 is covered with a dielectric film 5, and the silver electrode 4 is covered with a dielectric film 6. Furthermore, an insulator partition 7 is formed on the dielectric film 5 so as to be perpendicular to the transparent electrode 3 , and an insulator partition 8 is formed on the dielectric film 6 so as to be perpendicular to the silver electrode 4 . There is. The front substrate 1 and the rear substrate 2 are opposed to each other so that the insulating partition wall 7 is located in the gap between the silver electrodes 4 and the insulating partition wall 8 is located in the gap between the transparent electrodes 3, and hermetically sealed with the sealing material 9. However, the inside of the panel is evacuated and then a rare gas such as Ne is sealed. For reasons described later, the insulator partition walls 7 and 8 are formed to have approximately the same thickness, for example, 50 μm.

Next, the reason why insulator partition walls 7 and 8 are formed with the same layer thickness will be described. FIG. 4 is a diagram schematically showing electrodes of a plasma display panel, and FIG. 5 is a diagram showing voltage waveforms applied to such electrodes. 3-1, 3-2, 3-3, 4-1, 4-2, 4-3 in FIG. 4 are numbers 1 to 3 for the transparent electrode 3 and silver electrode 4 in FIG.
. In addition, Fig. 5 shows the electrode 3-1.3-2.
．． 3-3 and 4-1.4-2.4-3 are shown as example voltage waveforms. In Figure 5, 4-1.
4-2.4-3 is the voltage waveform for scanning, and 3-1.3-
2.3-3 is a data voltage waveform applied corresponding to the scanning voltage waveform.

At the time of selection, a voltage pulse having a peak value of VO and having a phase opposite to the scanning voltage pulse having a peak value of Vo is applied as a data voltage. Vo is normally set to 150V. Now, considering the timing T, the discharge cell (4) at the intersection of electrode 4-2 and electrode 3-2 shown in FIG.
-2, :3-2) is selected and discharge light is emitted. by the way,
Discharge cells (4-1, 3-2), (4-2, 3-1), (
4-2, 3-3) and (4-3, 3-2) are in the half-selected state, and the adjacent cells in the discharge state are supplied with 150V+.
Since a change in the electric field corresponding to 150V=300V is given, crosstalk between adjacent cells becomes a big problem. Therefore, insulator spacing is required to cut this crosstalk between cells, and insulator partition walls 7 and 8 are formed to have equal barrier heights in order to block crosstalk equally in the X and Y directions. There is a need.

However, recently, plasma displays are high-definition and CRT
The demand for products with a large display capacity comparable to that of 2000 is rapidly increasing, and in order to reduce the power consumption of such displays, a pulse voltage of 180V is applied to the scanning electrodes, and a pulse voltage of 30V is applied to the data electrodes. A so-called face selection driving method has been put into practical use in which a voltage is applied while controlling its polarity depending on the presence or absence of data.

[Problem that the invention seeks to solve]

However, due to the face selection drive mentioned above,
It has become clear that crosstalk in the scanning direction becomes a problem when driving a high-definition conventional plasma display panel shown in FIG. 3 with an inter-cell pitch of 0.4 mm or less.

The present invention solves the problem of crosstalk in the scanning direction caused by the face selection drive method by changing the structure of the insulator partition of the conventional plasma display panel.

[Means for solving problems]

In the plasma display panel of the present invention, a group of parallel transparent electrodes covered with a dielectric film is formed on a front substrate, and a first insulator is further formed on the dielectric film so as to be perpendicular to the transparent electrode group. On the other hand, a group of parallel electrodes covered with a dielectric film is formed on the rear substrate, and a second group of insulating partition walls is formed on the dielectric film perpendicularly to the electrode group. forming a front substrate and a rear substrate, the transparent electrode group and the electrode group on the rear substrate side are perpendicular to each other, and the first insulator partition group is arranged in the gap between the electrode group on the rear substrate side,
The second insulator barrier rib group is arranged opposite to each other so as to be disposed in the gap between the transparent electrode groups on the front substrate side, and the discharge gap is determined by the thickness of the first insulator barrier rib group and the thickness of the second insulator barrier rib group. In a plasma display panel that is hermetically sealed and has a dischargeable rare gas filled inside so that the It has a structure formed with different thicknesses.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention. Reference number 1
6 and 9 are the same as those of the conventional plasma display shown in FIG. 3, so their explanation will be omitted, and the insulator barrier rib groups 7 and 8, which are different from those in FIG. 3, will be explained. In FIG. 3 showing a conventional plasma display panel, insulator partition groups 7 and 8 are formed to have the same layer thickness of 50 μm, whereas in FIG. The layer thickness of the body partition group 7 is 75 μm, and the layer thickness of the insulator partition group 8 is 75 μm.
The layer thickness of each layer is changed to 25 μm. For example, the insulator barrier rib group 8 is formed to a layer thickness of 25 μm by one screen printing, while the insulator barrier rib group 7 is easily formed to a desired layer thickness of 75 μm by three times of screen printing. can do.

Next, the operation of the plasma display panel shown in FIG. 1 will be explained using the pulse waveform of the face selection driving method shown in FIG. 2. Now, considering the timing T, a voltage change of 180+30=210V is applied to the discharge cell (4-2, 3-2) at the intersection of electrode 4-2 and electrode 3-2 shown in FIG. Emits light. Discharge cell (4-1
, 3-2), (4-2, 3-1), (4-2, 3-3)
and (4-3, 3-2) are in a half-selected state, but a voltage change of at most 30 V is applied to discharge cells (4-1, 3-2> and (4-3, 3-2)) Also, a voltage change of 180-30=150V is given to the discharge cells (4-2, 3-1) and (4-2, 3-3), and the same as in the case of the conventional drive waveform shown in FIG. However, since the adjacent selective discharge cells (4-2, 3-2) are given a voltage change of 180+30=210V, which is lower than the 150+150=300V in the case of the conventional drive waveform, Crosstalk between adjacent cells will be considerably reduced. However, it has become clear that in the new drive method shown in FIG. 2, crosstalk different from the conventional one exists.

Now, considering the transition period from timing T to timing T+1, in the conventional case, a voltage change of 150 + 150 = 300V is applied between scanning voltages 4-2 and 4-3, whereas In the case of the drive shown in the figure, 180+18
Since a voltage change of 0=360V is applied, charge coupling in the scanning direction becomes very strong, and therefore inter-cell crosstalk in the scanning direction becomes a problem. By elucidating the mechanism of inter-cell crosstalk explained above, in the plasma display panel according to the present invention, in the scanning direction where crosstalk is strong, the layer thickness of the insulator partition 7 is increased to reduce crosstalk. Insulator partition between weak data electrodes 8
By reducing the layer thickness, we were able to create a plasma display panel with less crosstalk.

In addition, in the example, the layer thickness of the insulator barrier rib group between scanning electrodes is 75 μm, and the layer thickness of the insulator barrier rib group between data electrodes is 25 μm.
Although the thickness is .mu.m, the balance of the layer thickness can be changed appropriately by changing the magnitude of the applied voltage.

〔Effect of the invention〕

As explained above, the present invention achieves face selection by making the layer thickness of the insulator barrier rib group between scanning electrodes with strong crosstalk thicker than the layer thickness of the insulator barrier rib group between data electrodes with weak crosstalk. A plasma display panel with a wide operating voltage range suitable for the driving method can be provided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the plasma display panel of the present invention, FIG. 2 is a view showing an example of a driving pulse for driving the plasma display panel of the present invention, and FIG. 3 is a cross-sectional view showing a conventional plasma display. 4 are diagrams schematically showing electrodes of a plasma display panel, and FIG. 5 is a diagram showing an example of a conventional drive pulse. 1... Front substrate, 2... Rear substrate, 3... Transparent electrode (data electrode), 4... Back electrode (scanning electrode)
, 5.6... Dielectric film, 7, 8... Insulator partition, 9
...Sealing material, 4-1.4-2.4-3...Scanning electrode, 3-1.3-2.3-3...Data electrode. (Top Memory Day 21! R Kaya 4 Figure

Claims (1)

[Claims] forming a first electrode group parallel to each other on the substrate;
a front substrate having a first insulating barrier rib group formed on the dielectric film so as to be perpendicular to the first electrode group; forming a second electrode group, covering the second electrode group with a dielectric film, and further forming a second insulator on the dielectric film so as to be perpendicular to the second electrode group. a rear substrate having a group of partition walls, the first electrode group and the second electrode group are orthogonal to each other, and the first insulator partition group is arranged between the second electrode group; The second insulator barrier rib group is disposed between the first electrode group and faces each other, and the thickness of the first insulator barrier rib group and the second insulator barrier rib group are In a plasma display panel that is hermetically sealed so that a discharge gap is determined and a dischargeable rare gas is filled inside, the first insulator barrier rib group and the second insulator barrier rib group are connected to each other. A plasma display panel characterized by being formed with different thicknesses.