JPH0724190B2 - Gas discharge display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention particularly relates to an external electrode type gas having an electrode structure for realizing arbitrary display of characters, figures, etc. using a plurality of minute discharge display cells. The present invention relates to a discharge display device.

[Conventional technology]

Conventionally, an external electrode type gas discharge display device of this type has two insulating substrates each having a plurality of linear strip electrodes covered with a dielectric film, and insulating strips are formed so that the linear strip electrodes are orthogonal to each other. The structure has a structure in which a plurality of discharge spaces facing each other with a predetermined space therebetween are filled with neon gas.
For discharge driving, a discharge space corresponding to a desired display pattern was selected, and a rectangular wave voltage was applied through the linear strip electrodes that are orthogonally opposed to each other in this discharge space to discharge and emit neon gas.

[Problems to be solved by the invention]

In the above-described conventional gas discharge display device, since the intersections of the orthogonal linear strip electrodes correspond to the pixels to be displayed, for example, the number of pixels is 600 pixels horizontally (row) and 400 pixels vertically (row). In order to increase the number of linear strip electrodes,
, 400 row-side strip electrodes were required. In addition, the driving voltage of the gas discharge display device requires a high voltage such that the amplitude of a normal rectangular wave AC waveform is about 200V to 300V due to the distance between the opposing strip electrodes. Therefore, there is a problem that the scale of the drive circuit becomes large.

An object of the present invention is to reduce the number of drive electrodes and drive voltage in order to solve the above-mentioned conventional problems and to reduce the number of drive electrodes. An object is to provide a gas discharge display device.

[Means for solving problems]

The gas discharge display device of the present invention comprises a plurality of electrode pairs paired with two adjacent linear strips arranged substantially parallel to each other on a plane, and the electrode pairs extending from the upper surface to almost the entire surface. A first coating film of a dielectric material to be coated, a first partition of a substantially linear ridge-shaped insulator, which is arranged on the first coating film substantially orthogonal to the electrode pair, and Electrode pair,
A first substrate made of an insulating material in which a first coating film and a first partition wall are sequentially laminated on one surface forming a flat surface; and a substantially linear strip-shaped transparent electrode arranged substantially in parallel on a plane. A substantially linear strip-shaped light-shielding film that is arranged substantially parallel to the transparent electrode and alternately with the transparent electrode, and a second coating film of a dielectric material that covers substantially the entire surface of the light-shielding film and the transparent electrode. A second partition of a substantially linear ridge-shaped insulator which is arranged on the second coating film so as to be substantially orthogonal to the transparent electrode, and the transparent electrode, the light-shielding film, and the second coating film. And the second
The second substrate made of an insulator in which the partition walls are sequentially laminated and fixed to one surface forming a flat surface and the first and second partition walls are adhered substantially orthogonally to each other, and the first partition wall is the light shielding film and the second partition wall is formed. And a container which is arranged so as to face each other in the space between the pair of electrodes and is coupled with the first and second substrates and filled with an inert gas to hermetically seal the interior.

Therefore, one of the features of the present invention is that the gas discharge display device has an electrode pair that can easily discharge at a low voltage between two juxtaposed electrodes.

〔Example〕

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

FIG. 1 is a schematic view showing an embodiment of the present invention.

In FIG. 1, on the upper surface of a substrate 1 which is a rear substrate, linear strip electrode pairs 2 which are rear electrodes are arranged in parallel, and the entire surface is covered with a dielectric electrode coating film 3 and at predetermined intervals. The rectangular parallelepiped partition walls 4 orthogonal to the electrode pair 2 are sequentially stacked.

On the other hand, a linear plate-shaped transparent electrode 6 and a linear plate-shaped light-shielding film 7 are arranged in parallel on the lower surface of the substrate 5, which is a front substrate, and the entire surface of which is covered with a dielectric electrode coating film 8 is transparent. The rectangular columnar partition walls 9 orthogonal to the electrodes 6 are sequentially stacked.

The partition wall 4 on the rear substrate 1 has the same spacing as the light-shielding film 7 on the front substrate 5, or the partition wall 9 on the front substrate 5 is the rear substrate 1.
The electrode pair 2 has the same interval.

The partition walls 4 of the back substrate 1 and the partition walls 9 of the front substrate 5 are orthogonally opposed to each other so that the substrates 1 and 5 are overlapped with each other, and the partition walls 4 face the light shielding film 7 between the transparent electrodes 6 and also the partition walls. 9 is electrode pair 2
It is positioned and fixed between them, and an inert gas neon gas is injected to hermetically seal the surroundings with crystallized glass.

In this embodiment, the linear strip-shaped electrode pair 2 is formed by pairing two linear strip-shaped electrodes having a width of 60 μm in parallel with a gap of 60 μm and formed at a pitch of 360 μm at equal intervals. The method of formation was by sputtering aluminum. On the other hand, the transparent electrode 6
Was formed by chemical vapor deposition of a material in which antimony was added to tin oxide. The electrode pitch was 360 μm.

The dielectric coating films 3 and 8 were formed by using a thick film printing technique to form a paste in which low melting point lead glass powder was dispersed in an organic binder. The film thickness is 5 to 10 μm. In addition to low melting point lead glass, a black colorant is added to the dielectric coating film 3 formed on the rear substrate 1 to enhance the display contrast.

The light-shielding film 7 formed on the front substrate 5 is composed of a low melting point lead glass powder as a main component, a paste containing an aluminum oxide powder and a black colorant, and an organic binder, using a thick film printing technique. Formed. Film thickness is 10 to 20 μm
Has the effect of increasing the display contrast.

The partition walls 4 and 9 were formed by thick film printing using aluminum oxide as a main component, low melting point lead glass as a binder, and a paste in which a powder material added with a black colorant and an organic binder were mixed. The thick film is 40-60 μm. Partition 4, 9
Is a gap between the pair of linear strip electrodes 2 and the transparent electrode 6 facing each other.
It has the function of forming a discharge space by keeping it at about 100 μm. The partition walls 4 and 9 further prevent the discharge generated between the electrode pair 2 and the transparent electrode 6 from spreading along the electrode pair 2 and the transparent electrode 6,
It works to prevent crosstalk. Further, since it has a black color, it also has the effect of enhancing the display contrast. The partitions 4 and 9 after molding usually have a ridge shape.

Next, the operating principle of the present invention will be described.

A rectangular wave voltage of opposite phase is applied to each of the two electrodes of the electrode pair 2, and the neon gas filled in the discharge space formed by the electrode pair 2 and the transparent electrode 6 is excited in a state below the threshold value for discharge initiation. maintain. In this state, when a voltage waveform sufficient to cause discharge is applied to the transparent electrode 6 between the transparent electrode 6 and the electrode pair 2, discharge is induced between the electrode pair 2. By utilizing this operation, a rectangular wave voltage of opposite phase applied to the electrode pair 2 is sequentially scanned, and a voltage waveform sufficient to induce discharge is applied to the transparent electrode 6 at an appropriate timing to obtain a desired display pattern. You can

The feature of the present embodiment is that the gas discharge display device has an electrode pair formed by two electrodes arranged side by side, and can easily discharge at a low voltage between the electrodes. For example, the peak value of the applied voltage is 90V to 180V for the rectangular wave applied to the electrode pair 2 and 10V to 100V for the rectangular wave applied to the transparent electrode 6.

FIG. 2 is a schematic diagram showing an electrode structure of a gas discharge display device for graphic display having pixels of 400 rows and 640 columns realized by applying the present invention.

The electrodes X _{1 to} X ₆₄₀ on the column side in FIG. 2 correspond to the transparent electrodes 6 in FIG. Further, the first row-side electrodes Y _{1 to} Y ₂₀ and the second row-side electrodes y _{1 to} y ₂₀ have respective reference numerals Y ₁ · y _{1 to} Y ₁ · y.
_{20, ~, Y 20 · y} 1 ~Y 20 · y 20 and form a total of 400 pairs of electrode pair group corresponds to the electrode pair 2 of the linear strip of Figure 1.

FIG. 3 is a waveform diagram showing an example of a rectangular wave voltage applied to the electrodes configured as shown in FIG. In FIG. 3, the first row electrodes y _{1 to} y ₂₀ in FIG. 2 have an amplitude of 180 in the selected (ON) state.
V, duty 50%, frequency 1MHz square wave is applied,
Grounded in the non-selected (OFF) state. Second row-side electrode y ₁
In the selected (ON) state, a rectangular wave with an antiphase amplitude of 180 V, a duty of 50%, and a frequency of 1 MHz of the first row-side electrodes Y _{1 to} Y ₂₀ is applied to ~ y ₂₀ and grounded in the unselected (OFF) state. To be done. The column-side electrodes X _{1 to} X ₆₄₀ are the second row-side electrodes in the selected (ON) state.
y ₁ ~y ₂₀ amplitude 30V 50% duty applied voltage waveform antiphase to, square wave with a frequency of 1MHz is applied, the unselected (OF
Grounded in F) state.

Next, the timing of the applied voltage will be described taking the case of displaying the pixel A10 and the pixel B11 shown in FIG. 2 as an example.

Selecting a display row-electrode Y ₁ ~y ₁ and column-side electrode X ₂ of the pixel A10 unselected all were and other electrodes (ON) state (OFF)
It is realized by putting into a state. The display of the pixel B11 is realized by setting the row-side electrodes Y ₁ and y ₂ and the column-side electrode X ₂ to the selected (ON) state and all the other electrodes to the non-selected (OFF) state. In this way, by scanning the row-side electrodes sequentially and selecting appropriate column-side electrodes X _{1 to} X ₆₄₀ , or setting them in a non-selected state to cause discharge and maintaining the discharge, a desired pattern display can be obtained. . By the way, in this embodiment, the amplitude of the drive voltage waveform could drive the column-side electrode at a low voltage of 30V. In addition, we were able to reduce the number of row electrodes to 40, which is 1/10 of the number of pixels.

〔The invention's effect〕

As described above, according to the present invention, by forming one discharge space with three electrodes, the driving voltage can be lowered and the number of driving electrodes can be reduced, so that the driving circuit scale can be greatly reduced. There is.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the gas discharge display device of the present invention, FIG. 2 is a schematic diagram showing an example of the electrode configuration of the gas discharge display device of the present invention, and FIG. 3 is an example of a drive power waveform. It is a waveform diagram showing. 1.5 ... Substrate, 2 ... Electrode pair, 3.8 ... Coating film, 4
・ 9 ... Partition, 6 ... Transparent electrode, 7 ... Shading film, 10, 11
…… Pixels.

Claims (1)

[Claims] 1. A plurality of electrode pairs for display discharge, which are arranged in parallel to each other on a plane and which are adjacent to each other in the shape of a substantially straight strip, and the electrode pairs extending from the upper surface to almost the entire surface. A first coating film of a dielectric material to be coated, a first partition of a substantially linear ridge-shaped insulator, which is arranged on the first coating film substantially orthogonal to the electrode pair, and Electrode pair, first
And a first substrate of an insulator in which the coating film and the first partition wall are sequentially laminated on one surface forming a flat surface, and a substantially linear strip-shaped transparent plate for discharge induction arranged substantially parallel to the plane. An electrode, a substantially linear strip-shaped light-shielding film that is arranged substantially parallel to the transparent electrode and alternately with the transparent electrode, and a second dielectric member that covers substantially the entire surface of the light-shielding film and the transparent electrode.
And a second ridge-shaped insulator having a substantially straight line which is disposed on the second coating film substantially orthogonal to the transparent electrode.
Partition, a second substrate of an insulator in which the transparent electrode, the light-shielding film, the second coating film, and the second partition are sequentially laminated and fixed to one surface forming a flat surface, and the first and second partition walls. The first partition wall and the second partition wall so as to face each other in the space between the electrode pairs.
And a container for bonding the second substrate and filling the interior with an inert gas to hermetically seal the gas discharge display device.