JPS63274045A - Plasma display panel - Google Patents

Abstract

PURPOSE:To cut off the crosstalk in the direction along a scanning electrode by regulating discharge gaps with a group of partitions formed on dielectric members positioning at the electrode gaps of the first electrode group, at least at one substrate of either the front substrate or the rear substrate. CONSTITUTION:To one substrate of either the front substrate 1 or the rear substrate 2, or to both of the substrates 1 and 2, insulator partitions 7 and 8 formed on dielectric membranes 5 and 6 are placed positioning at the gaps of electrodes of the first electrode group 3, and the discharge gaps are regulated by the insulator partitions 7 and 8. In such a composition, the gaps between discharge cells along a scanning electrode 4 which has a strong crosstalk can be cut off perfectly by the insulator partitions 7 and 8.

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 insulating 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 briefly explained using FIG. 4.

FIG. 4 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 rear substrate. For example, a silver electrode is formed on the inner surface of 2. The transparent electrode 3 is covered with a dielectric film 5, and the silver electrode 4 is covered with a dielectric film 6. Furthermore, vjt body membrane 5
An insulator partition 7 is formed on the dielectric film 6 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 electric plate 4 . The front substrate 1 and the rear substrate 2 are opposed to each other so that the insulator partition 7 is located in the gap between the silver electrodes 40 and the insulator partition 8 is located in the gap between the transparent electrodes 3, and hermetically sealed with the sealant 9. However, the inside of the panel is evacuated and then a rare gas such as Ne is sealed. 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. 5 is a diagram schematically showing electrodes of a plasma display panel, and FIG. 6 is a diagram showing voltage waveforms applied to the electrodes. 3-1 in Figure 5
〜3-3.4-1〜4-3 are the transparent electrodes 3 in FIG.
and the silver electrodes 4 are numbered 1 to 3. Moreover, FIG. 6 shows an example of voltage waveforms applied to the electrodes 3-1 to 3-3 and 4-1 to 4-3. In FIG. 6, 4-1 to 4-3 are scanning voltage waveforms, and 3-1 to 3
-3 is a data voltage waveform applied corresponding to the scanning voltage waveform. ■ When selecting. A voltage pulse having a peak value of Vo, which is opposite in phase to the scanning voltage pulse having a peak value of Vo, is applied as a data voltage.

vo is usually 15. It is set to OV. Considering the timing T now, electrode 4-2 and electrode 3- shown in FIG.
The discharge cells (4-2, 3-2) at the intersection with 2 are selected and discharge and emit light. By the way, discharge cells (4-1, 3-2),
(4-2, 3-2), (4-2, 3-1), (4-2,
3-3) and (4-3, 3-2) are in a half-selected state and the adjacent cells in a discharged state receive 150V+150V.
= 300V (1 change), crosstalk between adjacent cells becomes a big problem.Therefore, insulator partitions are required to cut off this crosstalk between cells, and in the X direction In order to block crosstalk equally in the y direction, it is necessary to form the insulator partition walls 7 and 8 to have the same barrier height.

However, recently, plasma displays are high-definition and CR
The demand for products with a large display capacity comparable to that of T is rapidly increasing, and in order to reduce the power consumption of such plasma displays and increase the luminance, the scanning time is divided into the address period and the display hold period. A new drive system that divides the vehicle has been put into practical use.

[Problem that the invention seeks to solve]

However, it has become clear that the insulator partition structure of the conventional plasma display panel shown in FIG. 4 is not necessarily suitable for this new driving method. In other words, in the new drive method, crosstalk in the scanning direction
Crosstalk in the direction along the scan electrode is much more likely to occur, and therefore, the upper limit of the normal operating voltage has been determined by the crosstalk generation voltage in the direction along the scan electrode.

The present invention solves the problem of crosstalk in the direction along the scan electrode caused by a new driving method by changing the structure of the insulating barrier rib of the conventional plasma display panel.

[Means for solving problems]

The plasma display panel of the present invention includes a front substrate having a first electrode group parallel to each other covered with a dielectric film, and a rear substrate having a second electrode group parallel to each other covered with a dielectric film. and hermetically sealed with the first electrode group and the second electrode group facing each other so as to be perpendicular to each other,
In a plasma display panel in which a dischargeable rare gas is sealed inside, the dielectric film is disposed on at least one of the front substrate and the rear substrate so as to be located in the electrode gap of the first electrode group. It has a structure in which a group of insulating barrier ribs are formed, and a discharge gap is defined by the insulating barrier ribs.

〔Example〕

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

FIG. 1 is a sectional view of a panel showing a first embodiment of the present invention.
It is. 1 to 6 and 9 are similar to the conventional plasma display panel shown in FIG. 4, so their explanation will be omitted.
Insulator partition groups 7 and 8 different from those in FIG. 4 will be explained. In FIG. 4 showing a conventional plasma display panel, insulator barrier rib groups 7 and 8 have approximately the same layer thickness = 5.
In contrast, in FIG. 1 showing the first embodiment of the present invention, transparent electrodes are formed in the X direction and the Y direction so as to be orthogonal to each other at 0 μm. Insulator partition groups 7 and 8 are formed by screen printing in parallel to the transparent electrodes 3 so as to be located in the electrode gaps 3, respectively. The insulating barrier rib groups 7 and 8, each formed with a thickness of 50 μm, are assembled so as to overlap each other as shown in FIG. 1, and the discharge gap is Σ100.
Defined in μm. Therefore, the discharge cells along the scanning electrode 4 are completely isolated by the insulator barrier rib groups 7 and 8.

Next, the operation of the plasma display panel shown in FIG. 1 will be explained using the pulse waveform of the new driving method shown in FIG. 2. The principle of the new drive system will be briefly explained using timing T in FIG. One person at timing T is the display address period corresponding to scanning pole 4-2. Since the display electrodes 3-1 and 3-3 are applied with a cancellation pulse having the same phase as that of the scanning electrode 4-2, the discharge cells (4-2, 3-3)
1) and (4-2, 3-3) have 170-30=14
Only a voltage of 0 (V) is applied, therefore the discharge cell (4
-2, 3-1) and (4-2, 3-3) do not discharge. On the other hand, the discharge cell (4-2,372) has 170+30
Since a voltage of =200 (V) is applied, a discharge is generated. The reason why pulses with a slow frequency are applied during the address period TA is to perform addressing completely with a small number of pulses. During the hold period TI,
A pulse voltage having a high frequency and a peak value of 170V is applied to the scanning electrode 4-2. Discharge cell (4-2, 3-
1) , (4-2, 3-2) and (4-2, 3-3
), a pulse voltage of 170V is uniformly applied to the discharge cells (4-2, 3) that are addressed during the address period T.
-2), the discharge is held due to the priming effect of the discharge generated in the address period T, but the other discharge cells (4-2, 3-1) and (4-2, 3-3) do not discharge. . In this new driving method, the pulse voltage applied to the data electrodes is limited to pulses with a slow address period, so it is possible to significantly reduce power consumption compared to conventional plasma displays.

Now, at timing T, a voltage change of at most 30V is applied to the discharge cells (4-1, 3-2) and (4-3, 3-2) in the half-selected state, and the crosstalk is There is no problem at all. Furthermore, considering crosstalk in the scanning direction, there is no problem because the priming effect in the scanning direction is canceled by the erase pulse in the address period which occupies a relatively long time. Therefore, crosstalk becomes a problem because the addressed discharge cells (4-2, 3-2
) adjacent to (4-2.3-1) and (4-2,3-
3) is the discharge cell. By elucidating the mechanism of inter-cell crosstalk explained above, in the plasma display panel according to the present invention, charge coupling between cells along the scanning electrode with strong crosstalk can be completely blocked by the insulator barrier rib groups 7 and 8. It became possible to do so.

FIG. 3 is a sectional view of a second embodiment of the invention.

1 to 6 are exactly the same as in FIG. The masking layer 10 is formed by screen printing on the dielectric film 5 using a black insulating material so as to face the electrode gap between the rear electrodes (scanning electrodes) 4 in order to improve the contrast of the panel. It is. In addition, in this example (in this example), an insulator partition 8 was formed with a layer thickness of z100 μm by screen printing only on the rear substrate 2 side so as to be located in the electrode gap of the transparent electrode 3. This example In the first
In addition to obtaining the same effect as the embodiment described above, this embodiment has the advantage that the contrast of the panel can be improved, and that alignment can be simplified by concentrating the insulator partition walls on the rear substrate 2 side.

〔Effect of the invention〕

As explained above, the present invention completely isolates discharge cells along scanning electrodes with strong crosstalk by using a group of insulating barrier ribs, thereby achieving plasma generation with a wide operating voltage range suitable for new drive methods. Display panels can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a panel showing a first embodiment of the present invention;
FIG. 2 is a diagram showing a new driving voltage waveform for driving a plasma display panel according to the present invention, FIG. 3 is a sectional view of a panel showing a second embodiment of the present invention, and FIG. 4 is a diagram showing a conventional A sectional view of the panel, FIG. 5 is a diagram schematically showing an electrode configuration and a cell, and FIG. 6 is a diagram showing a conventional drive voltage waveform. 1...Front board, 2...Rear board, 3
...Transparent electrode, 4...Rear electrode, 5,
6... Dielectric film, 7° 8... Insulator partition, 9... Sealing material, 10... Masking layer. 1 person 4f'”1 Uchihara...7...
. ,゛) Invitation lΣ 2 pieces of foil and 3 pieces of bamboo

Claims (1)

[Claims] A front substrate having a first electrode group parallel to each other covered with a dielectric film and a rear substrate having a second electrode group parallel to each other covered with a dielectric film are connected to the first electrode. A plasma display panel in which a group of electrodes and a second electrode group are opposed to each other perpendicularly and hermetically sealed, and a rare gas capable of discharging is sealed inside the plasma display panel, wherein either the front substrate or the rear substrate One or both of the front substrate and the rear substrate have a group of insulator barrier ribs formed on the dielectric material so as to be located in the electrode gap of the first electrode group, and the discharge gap is formed by the group of insulator barrier ribs. A plasma display panel characterized by the following.