JPH05216414A - Planar-picture displaying apparatus utilizing gas discharging - Google Patents

Abstract

PURPOSE: To provide a plane image display device in which electric crosstalk between picture elements is prevented. CONSTITUTION: This device is roughly divided into a front surface plate 21, an insulation substrate 22 and a back surface plate 23 separated from each other for a prescribed interval and parallelly arrayed. Then, the first control electrodes 24 in a stripe form are mutually parallelly arrayed on the upper surface of the back surface plate 23 and the first control electrodes 24 in the stripe form are mutually parallelly arrayed in a direction perpendicular to a second control electrode 25 on the back surface of the insulation substrate 22. Then, third control electrodes 26 for which a fluorescent film 27 is formed are arrayed in the direction perpendicular to the second control electrode 25 on the back surface of the front surface plate 21. Then, plural holes 28 are formed on the second control electrode 25 and the insulation substrate 22 and plural partitions 29 are formed parallelly to the second control electrode 25 between the insulation substrate 22 and the back surface plate 23. The crosstalk between the picture elements is prevented and the display device capable of clear image display is provided. Also, electric energy loss is reduced in the respective electrodes, the device is driven even with low power and the display device made thinner than a typical plane image display device is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat image display device using a gas discharge, and its structure is such that crosstalk of pixels not selected is effectively prevented (CROSS TALK). Relates to an improved flat image display device.

[0002]

2. Description of the Related Art FIGS. 1 and 2 show US Pat.
A typical flat image display device disclosed in 9,388 is schematically shown.

This device has a structure in which a thermoelectron emitted from the cathode portion collides with a selected pixel so that an image is displayed on the entire surface and is roughly divided into three parts.

That is, it is divided into a front plate 1 made of a transparent glass material, an insulating substrate 2 having a plurality of holes 7 electrically insulated and through which thermoelectrons pass, and a back plate 3, which are mutually predetermined. They are spaced apart and arranged in parallel. A fluorescent layer 4 is entirely formed on the rear surface of the front plate 1 in parallel with the insulating substrate 2, and a rear electrode 8 is entirely formed on the upper surface of the rear plate 3. A plurality of stripe-shaped first control electrodes 5 are arranged parallel to each other on the back surface of the insulating substrate 2, and a plurality of stripe-shaped first control electrodes 5 are arranged on the front surface thereof in a direction orthogonal to the plurality of first control electrodes 5. The second control voltages 6 are arranged in parallel with each other. On the other hand, the plurality of first control electrodes 5 and the plurality of second control electrodes 6
The intersecting portion of is coincident with the hole 7 formed in the insulating substrate 2, and the hole 7 through which the thermoelectrons can pass is also formed in the first and second control electrodes 5 and 6 of the intersecting portion. A grid-shaped acceleration electrode 1 is provided between the insulating substrate 2 and the back plate 3.
0s are arranged in parallel with these. The acceleration electrode 10
A plurality of cathode lines 9 made of wires are arranged in parallel with the first control electrode 5 between the back plate 3 and the back plate 3.

In a typical flat panel image display device having such a structure, a voltage V ₄ which is substantially higher than the voltage V ₄ applied to the cathode line 9 is substantially applied to the acceleration electrode 10 during the operation of the device. ₃ is applied, and the voltages V ₁ and V ₂ relatively higher than the cathode line 9 are applied to the first control electrode 5 and the second control electrode 6, respectively. Therefore, in the operation of the display device, first, when the voltage V ₄ is applied to the cathode line 9, the cathode line 9 is heated and emits thermoelectrons. At this time, no voltage is applied to the first and second control electrodes 5 and 6, while the cathode line 9
To facilitate the emission of thermoelectrons from the cathode, the acceleration electrode 10 and the back electrode 8 are applied with voltages V ₃ and V ₅ , respectively, which are relatively higher than the voltage V ₄ applied to the cathode line 9. Then, the thermoelectrons are attracted by the accelerating electrode 10 toward the first control electrode 5, part of which collides with the accelerating electrode 10, and the rest of the electron passes between the first control electrode 5 and the accelerating electrode 10 with a uniform and dense density. To form a space charge cloud 11. Also, a space charge cloud 12 is formed between the back electrode 8 and the cathode line 9, but this does not affect the operation of the device.

In the scanning mode of the apparatus, when the voltages V ₁ and V ₂ according to the data signal are selectively applied to the _first and second electrodes 5 and 6, the thermoelectrons of the space charge cloud 11 are selected. A desired image is displayed by moving toward the front plate 1 through the hole 7 and colliding with the fluorescent layer 4.
At this time, the space charge cloud 11 is replenished with thermoelectrons by the acceleration electrode 10 as many as the number of thermoelectrons emitted. Therefore, the space charge cloud 11 always maintains a uniform and dense density.

However, in such a typical flat image display device, the space charge cloud 11 is uniformly arranged between the first control electrode 5 and the accelerating electrode 10 to form a space through an unselected hole 7. There is a problem that thermal electrons of the charge cloud 11 are emitted to induce so-called "crosstalk" which causes an unwanted pixel to emit light. In addition, since the thermoelectrons are controlled by the grid-shaped accelerating electrode 10 and the first and second control electrodes 5 and 6 arranged on the upper and lower surfaces of the insulating substrate 2 so as to be orthogonal to each other, the structure of the device is complicated. There is a problem that manufacturing becomes difficult. Since the apparatus is provided with the cathode line 9 for emitting thermoelectrons and the accelerating electrode 10 for accelerating thermoelectrons, it is disadvantageous in thinning the apparatus, and another driving voltage V ₃ for driving them is required. , V ₄ are required, and there is a problem that power consumption increases.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a flat image display device in which the above problems are solved.

That is, it is an object of the present invention to provide a flat image display device which prevents crosstalk between pixels, has a simple structure, and consumes less power.

Another object of the present invention is to provide a flat pixel image display device whose structure is improved so that the device can be made thinner.

[0011]

In order to achieve the above object, the flat image display device of the present invention comprises:

A back plate having a plurality of stripe-shaped first control electrodes arranged parallel to each other on its upper surface;

A plurality of stripe-shaped second control electrodes are arranged in parallel with the back plate and separated from each other by a predetermined distance. The second control electrodes are arranged in a direction perpendicular to the first control electrodes, and a plurality of holes are formed together with the second control electrodes. An insulating substrate on which is formed,

A front plate in which stripe-shaped third control electrodes, which are arranged in parallel with each other and are spaced apart from the upper surface of the insulating substrate by a predetermined distance, and a fluorescent film is formed on the back surface thereof, are arranged at right angles to the second control electrodes; ,

The insulating substrate and the back plate are maintained at a constant distance, and a plurality of barrier ribs are formed in parallel with the second control electrode to form a plurality of unit discharge spaces. A gas discharge is formed by the first control electrode and the second control electrode so that a desired image is displayed on the front plate.

According to the above-mentioned features of the present invention, in the present invention, the region between the insulating substrate and the back plate is formed by a plurality of partition walls in a plurality of unit discharge spaces, and the third control electrode having a fluorescent film is striped. Provided is a display device having a high color purity in which a so-called crosstalk phenomenon in which a fluorescent film emits light in an undesired pixel is prevented by being formed into a shape.

Further, in the conventional device, a cathode line and a grid-shaped accelerating electrode, first and second control electrodes, a back electrode, etc. are provided for the generation and control of thermoelectrons that cause the fluorescent film to emit light, and thus the structure is improved. However, the present invention provides a display device having a simple structure because an image is displayed by gas discharge by the first control electrode and the second control electrode, though it is complicated and difficult to manufacture.

Further, according to the present invention, since a cathode line and a grid-shaped accelerating electrode for generating and controlling thermoelectrons for causing the fluorescent film to emit light are not required, it is possible to make the display device thinner as the installation space of these becomes. In addition, power consumption can be reduced because a separate voltage for driving these is not required.

[0019]

The flat image display device using gas discharge according to the present invention provides a display device in which crosstalk between pixels is prevented and a clear image can be displayed, and electrical energy loss at each electrode is reduced. The device can be driven with electric power, and a display device which is thinner than a typical flat image display device is provided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 schematically shows a flat image display apparatus of a first embodiment according to the present invention, and FIG. 4 is a schematic sectional view of FIG. Reference numeral 23 is a back plate, and a plurality of stripe-shaped first control electrodes 24 are arranged in parallel with each other on the upper surface thereof. The first control electrode 24 is formed of a nickel paste by a photo etching method or a thick film process.
k film process). An insulating substrate 22 is installed in parallel with the upper surface of the back plate 23, and a plurality of stripe-shaped second control electrodes 25 are provided on the back surface thereof.
Are arranged in a direction perpendicular to the first control electrode 24. A large number of holes 28 are formed in the second control electrode 25 and the insulating substrate 22 where the first control electrode 24 and the second control electrode 25 intersect. Reference numeral 29 is a partition wall formed on the upper surface of the back plate 23 using an insulating paste by a thick film process, which is arranged in a direction perpendicular to the first control electrode 24 and in parallel with the second control electrode 25. To be done. The partition 29 is arranged between the plurality of second control electrodes 25. Therefore, between the plurality of barrier ribs 29, a unit discharge space 30 including one second control electrode is formed. The front substrate 21 is separated from the insulating substrate 22 by a predetermined distance, and the insulating substrate 2 is formed on the upper portion.
Installed in parallel with 2. The stripe-shaped third control electrodes 26 having the fluorescent film 27 are arranged on the back surface of the front plate 21 in a direction perpendicular to the second control electrodes 25.
Here, the third control electrode 26 is formed of a transparent electrode ITO. Finally, the front plate 21, the insulating substrate 22, and the back plate 23 are supported by side walls (not shown), and the inside thereof becomes a closed space. Then, an inert gas such as Xe or He is injected into the closed space.

Meanwhile, the second embodiment of the present invention shown in FIG.
In the embodiment, the second control electrode 25 is formed such that the edge portion in the length direction thereof is immersed in the adjacent partition wall 29. The other constituent elements of the apparatus are arranged as in the first embodiment, and detailed description thereof will be omitted. Therefore, the operation description described below is also applied to the first and second embodiments.

The first and second embodiments of the present invention having the above structure
In the operation of the flat image display device of the embodiment, FIGS.
Referring generally to, the second and third control electrodes 25, 26 are applied with a relatively higher voltage than the first control electrode 24 during the operation of the device. Further, the third control electrode 26 is applied with a voltage relatively higher than or equal to that of the second control electrode 25.

First, when a constant voltage is applied to each of the first control electrodes 24 and a voltage is selectively applied to the second and third control electrodes 25 and 26 by a data signal, the second control electrode 25
A negative glow discharge (Negative Glow) is generated in the discharge space 30 selected by the second control electrode 25 and the first control electrode 24.
Discharge) occurs, and the front plate 21 and the insulating substrate 2
In the space between the two, the selected second and third control electrodes 2
5, 26 form a positive column. Therefore, ultraviolet rays generated from the positive column excite the fluorescent film 27 on the front plate 21 to display a desired image.

On the other hand, a voltage higher than that of the second control electrode 25 is applied to the first and third control electrodes 24 and 26. Also,
The third control electrode 26 may apply a voltage relatively higher than or equal to that of the first control electrode 24. When a voltage is applied to the selected first and second control electrodes 24 and 25, an auxiliary discharge occurs in the selected discharge space 30, and a voltage is subsequently applied to the selected second and third control electrodes 25 and 26. Then, a main discharge is generated between the selected hole 28 and the third control electrode 26 facing the hole 28. Therefore, the fluorescent film 27 selected by the main discharge is excited and a desired image is displayed.

Here, since each of the discharge spaces 30 is blocked by the barrier ribs 29, electrical crosstalk causing gas discharge in the discharge space adjacent to the discharge space selected by the second control electrode 25 is prevented. .. Therefore, the present invention reduces the electrical energy loss of the selected second control electrode 25 and the first control electrode 24, and enables gas discharge in the selected discharge space 30 even at low power, so that the fluorescent light can be emitted only in the requested pixel. Membrane 27
Is emitted to enable a clear image display.

Further, in the prior art shown in FIG.
In order to generate and control the thermoelectrons that excite the fluorescent film, the cathode line 9 and the grid-shaped accelerating electrode 10, the first and second control electrodes 5 and 6, the back electrode 8 and the like are provided, so that the structure is complicated. However, the present invention shown in FIG. 3 discharges the gas in the discharge space 30 selected by the selected second control electrode 25 and the first control electrode 24, and Since a positive column is formed between the selected third control electrode 26 and the insulating substrate 22 to display a desired image, it is possible to display an image with a smaller number of electrodes than the conventional one. Therefore, its structure and manufacturing process are simpler than in the past.

Further, according to the present invention, the cathode line 9 and the grid-shaped accelerating electrode 10 for generating and controlling the thermoelectrons for exciting the fluorescent layer 4 of FIG. 1 are unnecessary. It enables thinning and also reduces power consumption because no separate voltage is needed to drive them.

In addition, in the second embodiment of the present invention, by forming a part of the second control electrode 25 so as to be immersed in the partition 29, the width between pixels can be narrowed, and a more dense image can be obtained. Enable display.

[0029]

As described above, the present invention has a structurally newer structure than that of the conventional flat image display device. The structure is simpler than the conventional one, and in particular, crosstalk between pixels is prevented and a clear image is obtained. It is advantageous for display.

The present invention can be modified into other types in addition to the above embodiments. The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the technical scope of the present invention.

[Brief description of drawings]

FIG. 1 is a partially cutaway separated perspective view showing a conventional planar image display device.

FIG. 2 is a schematic side sectional view of FIG.

FIG. 3 is a partially cutaway perspective view schematically showing the planar image display device according to the first embodiment of the present invention.

FIG. 4 is a schematic side sectional view of FIG.

FIG. 5 schematically shows a second embodiment according to the present invention.

[Explanation of symbols]

 21 front plate 22 insulating substrate 23 back plate 24 first control electrode 25 second control electrode 26 third control electrode 27 fluorescent film 28 hole 29 partition wall 30 discharge space

Claims (2)

[Claims] 1. A back plate having a plurality of stripe-shaped first control electrodes arranged parallel to each other on an upper surface thereof, and a plurality of stripe-shaped first control electrodes arranged in parallel with the back plate at a predetermined distance. The second control electrode is the first
An insulating substrate, which is arranged at right angles to the control electrode and has a plurality of holes formed with the second control electrode, is arranged in parallel with the upper surface of the insulating substrate by a predetermined distance, and a fluorescent film is formed on the back surface thereof. A front plate in which stripe-shaped third control electrodes are arranged at right angles to the second control electrodes, and the insulating substrate and the back plate are maintained at a predetermined interval.
A plurality of barrier ribs arranged in parallel with the control electrode to form a plurality of unit discharge spaces, and forming a gas discharge by the first control electrode and the second control electrode in the unit discharge space. A flat panel image display device, wherein a desired image is displayed on the front plate. 2. The flat image display device according to claim 1, wherein an edge portion of the first control electrode in the lengthwise direction is immersed in the partition wall.