JPH05232901A - Method for driving plasma display panel - Google Patents

Abstract

PURPOSE:To more surely induce writing discharge and to execute more stable writing operation by lower scanning voltage or data voltage by impressing writing voltage also to a maintenance electrode in addition to a scanning electrode at the time of writing data. CONSTITUTION:The 1st insulating base 1 having a surface discharge electrode 3 consisting of scanning electrode and maintenance electrode is stucked to the 2nd insulating base 2 having a data electrode 4 through an insulating partition 6 and discharge gas is sealed into a space 5 formed between both the bases 1, 2. At the time of writing data, a writing pulse superposed to a data pulse voltage applied to the data electrode 4 and allowing the whole discharge electrode to become a cathode part is impressed to the electrode 3. Namely a scanning pulse synchronizing with the scanning electrodes is impressed also to the maintenance electrodes to which only a maintenance voltage pulse is impressed at the time of writing data. Since the whole surface discharge electrode can be used as a cathode at the time of writing data, the area of the cathode can be expanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used for a display panel of an information terminal device or a personal computer, or an image display device of a television.

[0002]

2. Description of the Related Art A plasma display panel is suitable for a large area display because it has features such as large capacity, fast response speed, and wide viewing angle among flat displays. In particular, ac using the surface discharge shown in FIGS.
Type plasma display panel is a highly efficient and long-life panel having memory characteristics advantageous for obtaining high brightness.
In FIG. 5, 1 is a first insulating substrate made of glass, 2 is a second insulating substrate made of glass, 3 is a surface discharge electrode made of a metal thin film electrode such as A1 electrode, 4 is a data electrode made of a transparent conductive film, Reference numeral 5 is a discharge gas space filled with a discharge gas such as a rare gas, 6 is an insulator partition wall that is sandwiched between the first insulating substrate 1 and the second insulating substrate 2 and separates each display cell, and 7 is a discharge gas. Fluorescent substance that emits ultraviolet light generated by discharge, 8 is an insulator that covers the electrode, and 9 is a protective film such as MgO that protects the insulator from gas discharge. Further, as shown in FIG. 6, the surface discharge electrode 3 is divided into scan electrodes 11 and sustain electrodes 12 which are alternately parallel to each other.

FIG. 4 shows an example of a driving method of the plasma display panel. In FIG. 4, V
_S1 is a voltage waveform applied to the scan electrodes in the first row, and V _S2 is 2
The voltage waveform applied to the scan electrodes in the row, V _C is the voltage waveform applied to the sustain electrodes, and V _D is the voltage waveform applied to the data electrodes. FIG. 4 shows a case where the pixels connected to the scan electrodes in the first row are not written, but the pixels connected to the scan electrodes in the second row are written. As shown in FIG. 4, a data pulse 1 applied to the data electrode 4
4 and the scanning pulse 13 applied to the scanning electrode 11 in synchronization with this pulse are superimposed to write the display data. The main discharge is generated between the scan electrode 11 and the sustain electrode 12 by the sustain pulse 15. Further, before writing new data, the sustain discharge is erased by applying an erase pulse (not shown) having a voltage lower than the sustain pulse 15 or a narrow pulse width to the scan electrode 11. At this time, a positive pulse was applied as the data pulse and a negative pulse was applied as the sustain pulse 15, the scan pulse 13 and the erase pulse in order to prevent the phosphor 7 from being sputtered by the discharge gas ions.

[0004]

However, in the conventional method of driving the plasma display panel having the surface discharge electrode structure as described above, the writing operation of the display data is unstable and a high voltage is applied to the data pulse. Since it is necessary to secure the write operation in, there is a problem that a large number of high voltage drive circuits are required especially when driving a plasma display panel having a large area and a large display capacity.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a surface discharge type plasma display in which a discharge gas is filled with a first insulating substrate having a surface discharge electrode and a second insulating substrate having a data electrode sandwiching an insulating partition. When writing data in the panel, instead of applying the scan voltage only to the scan electrodes, the write voltage is also applied to the sustain electrodes that conventionally applied only the sustain pulse, and the cathode area during the write discharge is widened. It is characterized by having done.

[0006]

In the present invention, in order to stably write the display data, the scan pulse synchronized with the scan electrode at the time of writing is also applied to the sustain electrode to which only the sustain voltage pulse is conventionally applied. By doing so, the entire area of the surface discharge electrode can be used as a cathode at the time of data writing, and the cathode area can be widened. As a result, the writing discharge can be generated more reliably, and a more stable writing operation can be performed with a lower scanning voltage or a lower scanning voltage. , Can now be done with data voltage.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 5 and 6 are a structural sectional view and a plan view showing the structure of a surface discharge type plasma display panel to which the present invention is applied. In FIG. 5, 1 is a first insulating substrate made of 2 mm thick soda glass, 2 is a second insulating substrate also made of 2 mm thick soda glass, and 3 is A1 having a thickness of 2 μm.
Surface discharge electrodes consisting of scan electrodes and sustain electrodes made of thin films,
4 is a data electrode which is also a transparent nesa electrode, 5 is a discharge gas space filled with a discharge gas made of He mixed with 4% Xe at a total pressure of 200 Torr, 6 is a first insulating substrate 3 and a second insulating layer It is an insulator partition that is sandwiched by the substrate 2 and partitions the display cells 10. 7 is Zn ₂ Si that emits light by the ultraviolet light generated by the discharge of the discharge gas
A phosphor made of O ₄ : Mn, 8 is an insulator made of a thick transparent glaze covering the electrode, and 9 is a protective film of MgO having a thickness of 2 μm for protecting the insulator from gas discharge.

FIG. 1 shows a voltage waveform diagram of the first embodiment of the present invention. In FIG. 1, V _S1 is a voltage waveform applied to the scan electrodes in the first row, V _S2 is a voltage waveform applied to the scan electrodes in the second row, V _C1 is a voltage waveform applied to the sustain voltage in the first row, and V _C2
Is a voltage waveform applied to the sustain voltage on the second row, and V _D is a voltage waveform applied to the data electrode. As can be seen from FIG. 1, the scan pulse 13 is also applied to the sustain electrodes. That is, in the present invention, by applying the scan pulse 13 to each of the scan electrode and the sustain electrode, it is possible to increase the area of the electrode that becomes the cathode during the write discharge, and to reduce the low discharge without affecting the main discharge. It was possible to write stable display data with voltage. Other driving procedures, such as maintaining discharge
Erasure and the like are the same as the conventional one (the same applies to the following embodiments).

A second embodiment is shown in FIG. In this embodiment, as shown in FIG. 2, within a range in which the sustain electrode contributes to the write discharge, the scan pulse 1 having a lower voltage than the scan electrode is used.
3 is applied to the sustain electrodes. As a result, the sustained discharge after writing the data is facilitated.

FIG. 3 shows a third embodiment. In this embodiment, the pulse width of the scan pulse 13 applied to the sustain electrodes in synchronization with the data pulse 14 is made narrower than the pulse width of the scan pulse applied to the scan electrodes. As a result, after the scan pulse for the sustain electrode falls, the scan pulse on the scan electrode side allows the charged particles generated by the write discharge to be forcibly adsorbed on the scan electrode to form wall charges. Not only was data writing stabilized, but more stable sustained discharge after the writing operation could be obtained.

[0011]

As is apparent from the above description, in the surface discharge type plasma display panel, the wider the surface discharge electrode on the first insulating substrate for writing the display data, the lower the voltage for writing the display data. Therefore, by using the driving method of the present invention, it is possible to easily drive the panel, and it is possible to provide a plasma display panel having good display quality and driving characteristics.

[Brief description of drawings]

FIG. 1 is a drive voltage waveform diagram of a first embodiment of a method for driving a surface discharge plasma display panel using the present invention.

FIG. 2 is a drive voltage waveform diagram of a second embodiment of the method for driving a surface discharge plasma display panel used in the present invention.

FIG. 3 is a drive voltage waveform diagram of a third embodiment of a method of driving a surface discharge plasma display panel used in the present invention.

FIG. 4 is an example of a drive voltage waveform diagram of a conventional surface discharge plasma display panel driving method.

FIG. 5 is a structural cross-sectional view of a surface discharge plasma display panel.

FIG. 6 is a plan view of a surface discharge plasma display panel.

[Explanation of symbols]

 1 First Insulating Substrate 2 Second Insulating Substrate 3 Surface Discharge Electrode 4 Data Electrode 5 Discharge Gas Space 6 Insulator Partition 7 Phosphor 8 Insulator 9 Protective Film 10 Display Cell 11 Scan Electrode 12 Sustain Electrode 13 Scan Pulse 14 Data Pulse 15 Sustain pulse

Claims (3)

[Claims] 1. A first insulating substrate having a surface discharge electrode composed of a scan electrode and a sustain electrode and a second insulating substrate having a data electrode are bonded to each other with an insulating partition wall interposed therebetween, and a space formed between these substrates is provided. In a surface discharge type plasma display panel in which a discharge gas is filled, when writing data, a writing pulse is applied to the surface discharge electrode so that it overlaps with the data pulse voltage of the data electrode and the whole area of the surface discharge electrode becomes the cathode part. A method for driving a plasma display panel, comprising: 2. The method of driving a plasma display panel according to claim 1, wherein a scan pulse having a lower voltage is applied to the sustain electrodes than the scan electrodes when writing data. 3. The method of driving a plasma display panel according to claim 1, wherein a scan pulse having a shorter pulse width is applied to the sustain electrode than to the scan electrode when writing data.