JP3110498B2 - Gas discharge display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are those which relate to a gas discharge display equipment in a so-called pulse memory type.

[0002]

2. Description of the Related Art In recent years, OA such as personal computers
As a device capable of significantly reducing the thickness of a color CRT used as a display device for a display, a gas discharge type display device (PDP) for color display is demanded. However, when the gas discharge type display device is displayed in color, there is a characteristic that the light emission luminance is significantly reduced. This is because, when color display is to be performed, a gas that emits ultraviolet light, such as xenon gas, is used as the discharge gas, and the phosphor is excited to display each color, so that the conversion efficiency to visible light decreases. That's why.

As a technique for solving this problem, there has been a pulse memory method (for example, Murakami et al., J73-C-II, the journal of the Institute of Telecommunications of Japan). Hereinafter, this method will be described. FIG.
Panel As shown, the cathode _{K 1, K 2, K 3} , display anodes A ₁ and cathode group 31 consisting of ..., A _2, A _3, two kinds of display anode group 32 consisting of ... of It has a display matrix electrode group. 41 is a glass plate, 42 is a back plate, 43
Is a phosphor, 44 is a partition, 45 is a discharge cell, and 46 is a priming path. Although the discharge cell 45 has a structure in which the periphery is partitioned by a partition wall 44, charged particles are supplied from an adjacent cell through a priming path 46 to facilitate stable discharge. For example, a helium-xenon mixed gas and a small amount of mercury are sealed in the panel, and this is discharged by applying a voltage between the electrodes.
Ultraviolet light for exciting and emitting the phosphor 43 is mainly emitted from xenon gas. Mercury also plays a role in preventing the cathode material from being sputtered and preventing a decrease in luminance due to contamination of the phosphor.

FIG. 5 shows a pulse memory driving method.
I will explain using. As shown in FIG. 5, the display anode group A ₁ ,
A _2, A _3, the ... are applied sustain pulse V _a is always negative group K _1, K _2, K _3, the scan pulse V _k of the sequential negative potential from the cathode K ₁ to ... Is applied. In such applied voltage waveform, a method of writing display example into the discharge cells corresponding to the intersection of the display anode A ₂ and the cathode K _2. FIG.
As shown, when the display anode A ₂ applies a writing pulse V _w while the scan pulse is applied to the cathode K _2, the anode A ₂
And it occurs pulse discharge in the discharge cell 45 at the intersection of the cathode K _2, lowering the discharge start voltage of the cell. The display discharge cell 45 once written in this way discharges and emits light every time the sustain pulse Va is applied until the erase pulse _VE is applied to the cathode. Since the voltage of the erase pulse VE is set so that the voltage between the cathode and the display anode is equal to or lower than the discharge start voltage, the subsequent discharge stops.

When no write pulse is applied, or after the erase pulse is applied and the discharge is once stopped, the discharge start voltage of the display discharge cell 45 is kept high. Does not happen.

In such a pulse memory type PDP, high luminance is obtained because pulse light emission repeated from a write pulse to an erase pulse is used for display.
The maximum display brightness of about 100 cd / m ² has been reported, which is practically sufficient. Panels with a cell pitch of about 0.5 mm can be manufactured.

[0007]

However, in such a prior art, since the display discharge cells 45 are surrounded by the partition walls 44, particularly heavy mercury among the sealed gas is uniformly diffused in all the cells. And a cell having a low mercury density is generated. In such a cell, the effect of preventing the spattering of mercury does not function, so that there has been a problem that a partial decrease in luminance and discoloration, or even worse, a reduction in panel life is caused.

An object of the present invention is to solve the above-mentioned problems, and to provide a pulse memory type color PDP having a long life.

[0009]

A gas discharge type display according to the present invention.
The apparatus includes a plurality of first electrodes for achieving the above object.
The installed first substrate and a plurality of adjacent electrodes are connected to one substrate.
Installing multiple second electrodes divided into blocks as locks
With the second electrode, the first electrode and the second
The electrodes are arranged so as to be substantially orthogonal to each other, and the first electrode
Formed between the adjacent first electrodes parallel to the poles;
And adjacent blocks between the partitions.
The block partition formed between the locks is attached to the first base.
Disposed between a plate and the second substrate, the first substrate
A discharge medium containing mercury is sealed between the second substrate and the second substrate .

[0010]

According to the present invention, the number of partitions in the direction parallel to the cathode is reduced by the above configuration, so that mercury is easily diffused,
The effect of preventing the mercury cathode from being sputtered increases the life of the panel. In addition, since two or more cathodes do not enter the selection period at the same time in the same cathode block as a driving method, there is no fear of erroneous discharge when pulse memory driving is performed even if there is no parallel partition in the cathode block in the cathode block. And a high emission luminance can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1, a gas discharge type display (PDP) according to one embodiment of the present invention has a cathode on a back plate 1.
A cathode group 11 composed of K ₁ , K ₂ , K ₃ ,... Is installed, and elongated strip-shaped partitions W ₁ , W ₂ , W ₃ ,.
A discharge space is formed by separating the cathodes by the partition group 13 composed of. Further, the cathode group 11 is composed of L (for example, 16) as one block, and a block partition wall 14 is provided between each block in parallel with the cathode. On these partition groups, an anode group 12 composed of anodes A ₁ , A ₂ , A ₃ ,... And a glass plate 4 on which the phosphor 5 has been applied and fired, are provided with an anode group 12 and a cathode group 11. The discharge cells 6 are formed at the intersections so as to be orthogonally opposed to each other. Thereafter, the whole is hermetically sealed, and a rare gas such as He-X
An e-Kr mixed gas and a small amount of mercury are enclosed. Thus, in the panel structure of the present invention, there is no portion in the direction parallel to the cathode in the conventional partition wall 44 shown in FIG.
Instead, a block partition 14 is provided for every several cathodes,
In the block, the discharge cells communicate with each other. This point is essentially different from the conventional pulse memory type panel structure.

As described above, in the panel structure of this embodiment, since each discharge cell is not surrounded by a partition unlike the conventional example, mercury is easily diffused uniformly throughout the panel, and it is possible to suppress the sputtering of the cathode. it can. As a result, a color PDP with high luminance and long life is realized.

However, in such a panel structure, an erroneous display occurs when adjacent cathodes are sequentially scanned as in the conventional pulse memory system. That is, in the discharge cell to which the write pulse was applied immediately before, the discharge is continued by the sustain pulse, so that the discharge start voltage of the adjacent discharge cell is reduced by the generated charged particles. For this reason,
Next, when an adjacent cell is scanned, even when it is not necessary to display this cell, a discharge is started by the scanning pulse, resulting in an erroneous display. A driving method according to the present invention for preventing such an erroneous display will be described with reference to FIG.

The cathode group 11 is divided into n blocks, and the cathodes included in each block are adjacent to each other. 2, the first block, the second block,..., The n-th block from the top, and the numbers representing the cathodes included in the m-th block are m, n + m, 2n + m,.
(L-1) n + m. Here, L is the number of cathodes included in each block. For example, if the total number of cathodes is 480, L = 20 and n = 24.

The cathode group 1 divided into blocks as described above
On the other hand, in this embodiment, when a scanning pulse is applied in order of increasing power from the cathode of number 1 in the present embodiment, the scanning pulse is the first cathode of the first block, the first cathode of the second block,.
The first cathode of the n-th block, the second cathode of the first block, and so on are applied in this order. Here, the driving waveform of the anode is the same as that of the conventional pulse memory system. When a write pulse is applied to the anode while the cathode is being scanned, the discharge cell causes a discharge.

The discharge caused by the write pulse is maintained by the sustain pulse until the erase pulse is applied to the cathode. Thus, the cell once written,
Since the pulse emission is performed at most n times until the erase pulse is applied, high display luminance can be obtained. Further, the erase pulse is applied until writing is performed again on the cathodes of the same block after all the writing on the n blocks is completed, so that a display discharge does not occur simultaneously on the two cathodes in the same block. ing.

According to this scanning method, a maximum of one area is defined in the area divided by the partition group 13 and the block partition 14.
Since only one discharge cell is discharged, other display discharges are not affected. For this reason, erroneous display due to the above-mentioned cause does not occur even though the number of partition walls is reduced.

As described above, according to this embodiment, by removing the partition wall in the cathode direction and employing a scanning method for each block, the diffusion of mercury is facilitated as compared with the conventional pulse memory type panel, so that high diffusion is achieved. A gas discharge type display device with high luminance and long life can be obtained.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In FIG. 3, 1 is a back plate, 4
Is a glass plate, 5 is a phosphor, 6 is a discharge cell, 11 is a cathode group, 12 is an anode group, 13 is a partition group, 14 is a block partition, and the above is the same as the configuration of FIG. The difference from the configuration of FIG. 1 is that a trigger electrode 2 and a dielectric layer 3 are sequentially applied on a back plate 1, and a cathode group and barrier ribs are formed on the dielectric layer 3. The driving waveforms applied to the anode and the cathode in this embodiment are the same as those in FIG. A negative pulse is applied to the trigger electrode 2.

In the PDP of the present invention, unlike a conventional example, no discharge occurs in a cell belonging to an adjacent cathode when a certain cell is written. While this prevents erroneous display, there is no supply of charged particles which has been supplied through the priming path in the conventional example, the discharge starting voltage is high, and it is difficult to maintain stable discharge. The trigger electrode 2 according to the present embodiment functions to generate charged particles on the front surface of the panel in advance even without the supply of charged particles from an adjacent cell, and operates as described below.

A negative pulse is applied to the trigger electrode 2 immediately before the scanning of the cathode No. 1 starts. This pulse causes a weak preliminary discharge in all the discharge cells, and a part of the generated charged particles is accumulated on the dielectric layer 3. The charged particles thus accumulated on the dielectric layer 3 become seeds of a discharge when a scanning pulse is applied to each cathode, and lower the starting voltage of the main discharge. By the action of the trigger electrode 2 described above, even if no discharge occurs in an adjacent cell, the writing operation is assured and a stable discharge can be obtained.

As described above, according to this embodiment, in addition to the features of the first embodiment, by providing a trigger electrode,
It is possible to provide a gas discharge type display device which can obtain stable display in addition to high brightness and long life.

[0024]

As described above, according to the present invention, a partition wall in the direction parallel to the cathode is provided for each cathode block in which several cathodes are combined.
Compared to conventional pulse memory type panels
It is possible to realize a gas discharge type display device of a pulse memory type having excellent characteristics, in which diffusion of mercury is facilitated, high luminance and long life due to the effect of preventing spatter of mercury are achieved.

[Brief description of the drawings]

FIG. 1 is a structural diagram of a gas discharge type display device according to a first embodiment of the present invention.

FIG. 2 is a waveform chart for explaining a method of driving the gas discharge display device of the present invention.

FIG. 3 is a structural diagram of a gas discharge type display device according to a second embodiment of the present invention.

FIG. 4 is a structural view of a conventional pulse discharge type gas discharge type display device.

FIG. 5 is a waveform chart for explaining a method of driving a conventional pulse discharge type gas discharge display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back plate 2 Trigger electrode 3 Dielectric layer 4 Glass plate 5 Phosphor 6 Discharge cell 11 Cathode group 12 Anode group 13 Partition group 14 Block partition 31 Cathode group 32 Anode group 41 Glass plate 42 Back plate 43 Phosphor 44 Partition 45 Discharge Cell 46 priming pass

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Utaro Miyagawa 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Denko Kogyo Co., Ltd. (56) References JP-A-63-53836 (JP, A) JP-A-57-212745 (JP, A) JP-A-63-33718 (JP, A) JP-A-60-230339 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01J 17/49 H01J 17/04 H01J 17/20 G09G 3/28

Claims (3)

(57) [Claims] 1. A first substrate on which a plurality of first electrodes are provided.
And multiple adjacent electrodes as one block.
A second substrate on which a plurality of divided second electrodes are installed;
However, the first electrode and the second electrode are substantially orthogonal.
So as to be opposed to and parallel to the first electrode,
A partition formed between the adjacent first electrodes; and
Between the partitions and the adjacent blocks
The formed block partition is divided into the first substrate and the second substrate.
A first substrate and a second substrate disposed between the first substrate and the second substrate
Memory with a discharge medium containing mercury between
Type gas discharge type display device. 2. A third electrode and a dielectric on the second substrate.
Layers in this order, and forming the second electrode on the dielectric layer.
The gas discharge type display device according to claim 1, wherein 3. The method according to claim 2, wherein the first electrode is an anode, and the second electrode is an anode.
3. The gas discharge type according to claim 1, wherein the electrode is a cathode.
Display device.