JPS58163131A - Plasma display panel - Google Patents

Abstract

PURPOSE:To greatly decrease the number of driving circuits and reduce the size of the captioned panel, by matrix-dividing an electrode. CONSTITUTION:On a transparent glass substrate 1, a display electrode 6 coated with a dielectric 9 is formed; on a glass substrate 2 provided with a formed writing electrode 3, a glass sheet 10 having an opening acting as a discharge space is laminated in order to form an address cell; further, an address electrode 4 coated with a dielectric 7 is formed on one face of a glass sheet 12 which is perforated in order to obtain a small hole for gas-passage between the address cell and the display cell. On the other surface, an electrode 5 is formed, which is coated with a dielectric 8 and possesses both functions of the display electrode and transfer of the excessive electric charge inside the address cell into the display cell; such intermediate glass sheet 12 and a glass sheet 11 having an opening acting as a discharge space in order to form the display cell are correctly positioned to each other on the glass sheet 10 and laminated; and the glass substrate 1 provided with a formed the display electrode 6 which is coated with a dielectric 9 is laminated on the glass sheet so as to make the display electrode 6 and the writing electrode 3 to face each other, then all the above components are hermetically sealed by means of a sealing material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plasma display panel, and more particularly to an Otani lid plasma display panel.

Display panels that utilize gas discharge, known as plasma display panels, have been put into practical use as large-area flat display devices, and in the future, they will become increasingly large-area, large-capacity devices that will play a role in terminal equipment. There are high hopes for this to become a reality.

On the other hand, in order to realize such a large-capacity plasma display panel, it is necessary to avoid the reduction in brightness and non-uniformity of brightness that accompanies the increase in capacity, and to configure pixels at a fine pitch to make the device more compact. It has become a major technical problem to reduce the cost of the display device including the drive circuit by reducing the number of drive circuits as much as possible.

AC refresh-type plasma display panel (
(Hereinafter, the plasma display pile will be referred to as FDP)
It has excellent features such as being able to configure pixels with a fine pitch, stable operation and long life, and a simple drive circuit. However, since driving is a method of time-dividing pixels and selectively applying voltage to obtain the desired display, this method has the drawbacks of an increase in the number of drive circuits and a decrease in brightness as the number of pixels increases. There is.

These drawbacks make it difficult to increase the display capacity.

On the other hand, AC memory type FDPs and self-shifting type PDPs have the characteristic that display brightness does not depend on the number of pixels, and have the potential to provide a large display capacity P D l). However, the memory function of AC memory type PDPs is obtained by wall charges generated by gas discharge, and it is necessary to control this wall charge for each pixel. It has the disadvantage that only one person is required.

In addition, self-shift) FDPs are generally divided into plying type and charge transfer type, and both use multi-phase connected electrodes to shift and display display information.
Compared to DP, it is possible to significantly reduce the number of drive circuits, and it also has the advantage that constant brightness can be obtained regardless of the number of pixels. However, both the pricing type and charge transfer type have the disadvantage that it is difficult to configure each pixel with a fine pitch due to their structure, and therefore, as the display capacity 1゛ increases, the panel size increases and it becomes difficult to make it compact. There is.

An object of the present invention is to solve the above-mentioned drawbacks by establishing gas communication between a display cell and an address cell for selecting the display cell, and applying a charge transfer function in a so-called charge transfer type FDP to the display cell and address cell. The purpose is to provide a large capacity 1 PDP.

According to the present invention, the cell is composed of an address cell and a pair of address electrodes, and a display cell and a pair of display electrodes that are in contact with a dielectric. A pair of display devices in which an address cell is detected, either a positive charge or an electron is retained in the address cell, the positive charge or electron is transferred into the display cell, and a evening voltage is applied. In a plasma display panel configured to cause the electrodes to generate and maintain the discharge, a pair of addressing electrodes is formed by a first electrode not covered with a dielectric material and a first electrode covered with a dielectric material. a pair of third and fourth display electrodes arranged in the display cell, the display cell being adjacent to the address cell and in gas communication with the address electrode; A plasma display panel characterized by the following can be obtained.

In the plasma nice play panel according to the present invention, a display cell and an address cell for selecting the display cell are connected with gas through, for example, a small hole, and the address cell is covered with a dielectric material disposed inside the address cell. For example, the first electrode with a positive charge is operated at a predetermined address position (near the second electrode coated with a dielectric material) as a 'rlL pole for swearing, and when the omission is performed, , the address cell is electrically in an excess positive charge state by the amount of positive charge written by the first electrode. Therefore, the address cell can assume a binary state of a state in which a positive charge is written and a state in which a positive charge is not written, depending on whether writing is performed or not. The positive charge written in the address cell is
It can be actuated so as to be transferred into the display cell by a third electrode disposed within the display cell, and further by applying pulse voltages having opposite phases to each other to the third electrode and the fourth electrode. A discharge can be maintained within the display cell.

On the other hand, if a positive charge is not written in the address cell, discharge may occur in the display cell, and even if a positive charge is written in the address cell,
Unless a positive charge is transferred into the third 11-pole display cell, no discharge will be generated within the display cell. Therefore, the display can be controlled by the presence or absence of information in the address cell and the action of the third electrode, which is a transfer voltage of the information into the display cell.

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 1 is a cross-sectional view of a panel showing a first embodiment of a plasma display panel according to the present invention (a single cell is shown). According to FIG. 1, a transparent glass substrate 2 is not coated with a dielectric material. A plating electrode 3 is formed, a display electrode 6 is formed on the transparent glass substrate 1 and is contacted by a dielectric 9, and an address electrode 3 is formed on the glass substrate 2 on which the writing electrode 3 is formed. To form a cell, glass sheets 10 each having a discharge space as an opening are laminated, and a dielectric material 7 is coated on both sides of a glass sheet 12 having small holes for gas communication between an address cell and a display cell. An oval address electrode 4 is formed, and the other surface is coated with a dielectric material 8, which has both the function of a display electrode and the function of transferring excess charge in the address cell to the display cell. forming an electrode 5;
Such an intermediate glass sheet 12 and a glass sheet 11 having a discharge space as an opening to form a display cell are laminated with proper alignment on the glass sheet 10, and finally, a display coated with a dielectric material 9 is produced. The glass substrate 1 on which the display electrode 6 is formed is stacked on the glass sheet 11 so that the display electrode 6 and the sopping electrode 3 face each other, and these are hermetically sealed with a sealant 13. , the first according to the present invention
Examples can be obtained.

The glass sheet 10 and the glass sheet 11 are made by screen printing, for example, AJ20. It may be formed by printing a base coat containing as main components a glass component and a glass component. In this case, the glass substrate 2 on which the address cell member 10 is formed and the glass substrate 1 on which the display cell member 11 is formed. An intermediate glass sheet 12 having an address electrode 4 and an electrodeposited layer 5 having a display function and a charge transfer function formed on both sides is sandwiched between the display electrode 6 and the write electrode 3 so that the display electrode 6 and the write electrode 3 face each other. By sealing the first
Examples can be obtained.

FIG. 2 is a sectional view of a panel showing a second embodiment of the invention. (A single cell is shown.) According to FIG. 2, a writing electrode 3 not covered with a dielectric material is formed on a transparent glass substrate 2, and a display electrode 3 coated with a dielectric material 8 is formed on a transparent glass substrate 1. A glass sheet 10 having an address electrode 4 covered with a dielectric material 7 is written on a glass sheet on which an electrode 5 having a function and a charge transfer function is formed and a discharge space is opened to form an address cell. On the glass substrate 1 on which the charge transfer electrode 5 covered with a dielectric material 8 was formed, a glass sheet with a discharge space as an opening was laminated on the glass substrate 2 on which the charge transfer electrode 5 was formed and covered with a dielectric material 8 to form a display cell. A glass sheet 11 on which a display electrode 6 covered with a dielectric material 9 is formed is laminated on the glass sheet 11, and the glass substrate 1 and the glass substrate 2 are made to face each other so that the charge transfer electrode 5 and the writing electrode 3 face each other. , glass sheet 1 laminated on the glass substrate 1 side
1 and the glass sheet 10 laminated on the glass substrate 2 side, a hole as large as the opening of the address cell and the display cell is made for gas communication between the address cell and the display cell, and A second embodiment of the present invention can be obtained by sandwiching an intermediate glass sheet 12 having a thickness sufficient to ensure a gap and hermetically sealing these with a sealant 13.

As in the case of the first embodiment, the glass sheets 10 and 11 can be replaced by an insulator layer formed by screen printing, and the intermediate glass sheet 12 can also be replaced by an insulator layer formed by screen printing. It can be replaced by layers. Therefore, in the second embodiment, it is possible to easily form a panel by using conventional thick film technology. FIG. 3 explains the operation of the first and second embodiments. This figure shows an example of a pulse voltage waveform for Third
Apply each pulse voltage waveform in the figure! Pole symbols are shown, which correspond to the symbols given in FIGS. 1 and 2. In FIG. 3, the address cell is discharged by applying a positive pulse voltage of vI to the write electrode 3 in accordance with the timing when a pulse voltage of oV is applied to the address electrode 4. , positive charges are abundantly distributed in the vicinity of the address electrode that acts as a cathode, while electrons are abundantly distributed in the vicinity of the address electrode 3 that acts as an anode. Since the cathode is not covered with a dielectric material, electrons are freely extracted as a current through the anode 3, whereas the cathode is covered with a dielectric material, so a positive charge remains near the address electrode 4. ,
There is an excess of electrically positive charge in the address cell, and this state is maintained. Thereafter, when an OV pulse voltage is applied to the electrode 5, which functions as a charge transfer electrode and a display electrode, with a phase shift from the OV pulse voltage applied to the electrode 4, as shown in FIG. A discharge is generated between the electrodes 4 and 5 by applying an electric field formed by residual positive charges to the electrodes, and after generation of an AC discharge in which both electrodes are covered with a dielectric, the address cell is The excess positive charge inside the display cell is transferred to the inside of the display cell, and specifically, the excess positive charge is retained near the electrode 5. Thereafter, when pulse voltages with opposite phases are applied between the display electrodes 5 and 6, the positive held near the display electrodes 5 is transferred into the display cell with the help of the electric field caused by the charges. The discharge will be maintained.

In the writing mode of FIG. 3 explained above, the electrode 3
Unless a filling pulse vI is applied to the address cell, no discharge will occur in the address cell, and therefore no discharge will occur in the display cell. Furthermore, even if a discharge is generated in the address cell and a positive charge is held near the address electrode 4, the Ov transfer pulse in the write mode shown in FIG. 3 is applied to the charge transfer electrode 5. If not applied,
Positive charges do not transfer into the display cell, therefore,
Even if voltage pulses having opposite phases are applied between the display electrodes 5 and 6 in the sustain mode shown in FIG. 3, a discharge is not generated and maintained within the display cell.

FIG. 4 is a cross-sectional view showing an embodiment of a panel in which a plurality of unit discharge cells shown in FIG. 2 are arranged, and each symbol in FIG. 4 corresponds to the symbol attached to FIG. 2. . FIG. 5 is an exploded perspective view of FIG. 4, and the symbols in FIG. 4 correspond to each other. However, in Figure 5, the fourth
The dielectrics rfk7, rfk8 and rfk9 in the figure are omitted. The structure of FIG. 5 is the same as previously explained in the second embodiment, but in FIG. 5, 14 is an opening formed in the glass sheet 10 to form an address cell. ,
15 is an opening formed in the glass sheet 11 to form a display cell, and 16 is an opening formed in the intermediate glass sheet 12 to provide gas communication between the address cell and the display cell. For example, as shown in FIG. 2, the central axes of openings 14, 15 and 16 are made to coincide, openings 14 and 15 are of the same size, and opening 16 is formed slightly larger than openings 14 and 15. 0 In addition, Fig. 5 shows an example of the configuration of IJ wax electrodes for driving 24 discharge cells, and the electrodes 3 for injecting are 31, 32 and 33 (13-3). The address electrode 4 is made up of two electrodes 41 and 42.
The electrode 5 for display and charge transfer is composed of two electrodes 51 and 52, and the electrode 6 for display is composed of two electrodes 61 and 6.
2, and the total number of chamber poles is 9. In such an example, since the number of discharge cells is small, the number of electrodes is not reduced compared to the total number of chamber electrodes required for the refresh type, which is 10. In the panel, 2
By dividing into a matrix of 0 x 20 x 10 x 25, the total number of chamber poles can be made 75.
It is possible to significantly reduce the number of electrodes compared to the 650 electrodes of the conventional model.

FIG. 6 is an example of a pulse voltage waveform for driving the embodiment shown in FIG. The pulse voltage train shown in Figure 6 is
It can be divided into two modes: write mode and display sustain mode. First, information is written to all discharge cells as positive charges to the display cells, and then all cells are switched to discharge sustain mode at once. By changing the display cell, a display cell in which all information is written with a positive charge can be discharged due to the superposition of one field caused by the positive charge, and a display cell in which no information has been written can be discharged, so that the desired information can be generated. can be displayed.

This pattern will be explained in detail with reference to FIG.

Electrodes 41 and 42 function in this case as scanning electrodes,
A pulse train having an amplitude in the negative direction acts as a selection pulse. In response to such selection pulses, the electrodes 31 to 33
A pulse train with a positive amplitude, which is a pulse of information omission, is applied to the pulse train. After a discharge is generated, a positive charge is retained in the address cell to which a positive write pulse is applied.
It is transferred into the display cell by a charge transfer pulse that overrides the negative amplitude of the electrode 51. At this time, since the electrode 52 is in a non-selected state, the display cell corresponding to the electrode 52 has a positive 1. The charge is not transferred, and then in the display cell corresponding to one display electrode 62, the positive charge is transferred to the display electrode 62 side by a pulse having a negative amplitude applied to the display electrode 62. At this time, the states of the discharge cells achieved by the first selection pulse of the scan electrode 41 are a cell in which positive charges are held in the address cell and the display cell, a cell in which positive charges are written in the address cell, and a display cell in which positive charges are written in the address cell. There is a cell in which no positive charge is written, a charge transfer electrode 51 in the display cell.
There are four types: a cell in which a positive charge is written in the vicinity, and a cell in which a positive charge is written in the vicinity of the display electrode 62 in the display cell. Next, when an erasing pulse having a negative amplitude is applied to the information writing electrodes 31 to 33, the magnitude of the erasing pulse causes a positive charge to be generated in the vicinity of the information writing electrodes 41.42 and the display electrodes 61.62. is selected to cause a discharge with the help of such positive charges, so that the positive charges held near the scanning electrode or display electrode are transferred to the writing electrode side. However, after a while, it disappears due to recombination. As a result, only the positive charges held in the charge transfer electrodes are held, and therefore information can be written only into desired display cells. By repeating scanning, writing information into address cells, transferring information into display cells, and erasing unnecessary information in this manner, desired information can be written into all display cells. When the desired information has been written into all display cells, the display is started by applying pulse trains of opposite phases to the display electrodes 51, 52 and 61, 62 as shown in the maintenance mode in FIG. can be maintained.

As explained above, in the plasma display panel according to the present invention, by dividing the electrodes into a matrix, it is possible to significantly reduce the number of driving circuits, and -E
Since the display is a full-time display, it is possible to obtain high brightness, and in addition, it is different from the conventional self-thinning (PDP) in which multiple discharge cells are configured as one pixel. ■The discharge cell corresponds to one pixel. Therefore, it is possible to realize a fine pixel pitch. The only problem with the FDP according to the present invention is the time required for writing.
When performing 25x10 matrix division, 1 of all cells
The time required for writing is at most 0517 seconds, and this writing time is sufficient for practical use.

Furthermore, since the PD 1) according to the present invention serves both as a writing electrode and an erasing electrode, and one such electrode corresponds to one pixel, compared to the conventional charge transfer type 1) DP,
1- The stability of writing and erasing operations has been dramatically improved,
Furthermore, it has become possible to significantly reduce deterioration of the erasing electrode, and it has become possible to improve not only the operational stability but also the reliability of the PDP.

Furthermore, since the display cell employs an external electrode type cell which is generally said to have excellent reliability, it goes without saying that the reliability is extremely high.

In the first explanation of the principle and in the embodiments, only positive charges have been explained as the charges to be controlled, but the same effect can be expected when controlling electrons.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a panel (unit cell) showing a first embodiment of the present invention, and FIG. 2 is a sectional view of a panel (unit cell) showing a second embodiment of the present invention. Figure 3 shows pulse voltage and pressure waveforms to explain the operation of the unit cells shown in Figure 1 or Figure 2, and Figure 4 shows one of the panels in which a plurality of unit cells shown in Figure 2 are arranged. 5 is an exploded perspective view of FIG. 4, showing an example of matrix division of electrodes, and FIG. 6 is a pulse diagram for driving the panel of FIG. 5. This is an example of a voltage waveform. In the figure, 1, 2...transparent glass substrate, 3...
...Writing electrode (address electrode), 4...
. . . address electrode, 5 . . . charge transfer and display electrode, 6 . . . display electrode, 7, 8.
9... Dielectric layer 10... Address cell member or address cell glass sheet, 11...
・Display cell member or display cell glass sheet, 12...
...Intermediate member or intermediate glass sheet having holes for gas communication between the address cell and the display cell, 13...
...Sealing agent, 14...Address cell opening, 15...Display cell opening, 16...
Opening formed in the intermediate glass sheet for gas communication between the address cell and the display cell, 31°32.33...
・Electrode terminal for reading, 41.42... Scanning electrode terminal for address, 51, 52... Electrode terminal for charge transfer and display, 61.62... Display electrode terminal. ″)

Claims (1)

[Claims] The plasma display panel includes an address cell, a pair of address electrodes, a display cell, and a pair of display electrodes in contact with a dielectric, and by applying a voltage to the pair of address electrodes, The pair of cells in which the addressing cell is discharged, either positive charges or electrons remain in the addressing cell, the positive charge or electrons are transferred into the displaying cell, and an alternating current voltage is applied. The display electrodes emit radiation to the display cells.
ii: In a plasma display panel configured to generate and maintain the discharge, the pair of addressing electrodes are connected to each other by a dielectric, and the first electrode is in contact with the dielectric. a second electrode in contact with the display cell, the display cell being adjacent to and in gas communication with the addressing cell, and disposed within the display cell; 4. A plasma display panel comprising the pair of display electrodes.