JPS6332830A - Gas-discharge display - Google Patents

Abstract

PURPOSE:To realize reduction in drive voltage and in the number of drive electrodes so that a scale of drive circuit becomes s.all, by composing a discharge space of three electrodes. CONSTITUTION:Two square-wave voltages whose phases are opposite to each other are impressed respectively on two of paired electrodes 2. A neon gas, with which discharge spaces formed between the paired electrodes 2 and transparent electrodes 6 are filled, is then maintained in its excited state below a threshold value for start of discharge start. In this state, when voltage waves enough to generate the discharge either between two of the transparent electrodes 6 or between two of the paired electrodes 2 are impressed on the transparent electrodes 6, discharge is induced between two of the paired electrodes 2. When serial scanning of square-wave voltages, which are respectively in opposite phases and are applied between two of the paired electrodes 2, is performed and then voltage waves enough to induce discharge in proper timing are impressed on the transparent electrodes 6 by using this operation, desirable display patterns can be obtained. Thus, this gas-discharge display can be provided with the paired electrodes comprising two juxtaposed electrodes, capable of easily discharging with low voltage between their them.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention particularly relates to an external electrode type gas having an electrode structure that realizes arbitrary display of characters, figures, etc. using a plurality of micro discharge display cells 3. The present invention relates to a discharge display device.

[Conventional technology]

Conventionally, this type of external electrode type gas discharge display device consists of two insulating substrates each having a plurality of linear strip-shaped electrodes covered with a dielectric film, and an insulating partition wall arranged between the two insulating substrates so that the linear strip-shaped electrodes are orthogonal to each other. It had a structure in which neon gas was filled in a plurality of discharge spaces facing each other at a predetermined interval.

Discharge driving was carried out by selecting a discharge space corresponding to a desired display pattern, applying a rectangular wave voltage through orthogonally opposing straight band electrodes in this discharge space, and causing neon gas to discharge and emit light.

[Problems to be Solved by the Invention] In the conventional gas discharge display device described above, the intersection points of orthogonal linear strip electrodes correspond to display pixels, so the number of pixels is, for example, 600 pixels horizontally (columns), In order to realize a display of 400 pixels vertically (rows), the number of linear strip electrodes required was 600 strip electrodes on the column side and 400 strip electrodes on the row side.

In addition, the driving voltage of the gas discharge display device is such that the amplitude of the normal rectangular AC waveform is 200V due to the distance between the opposing strip electrodes.
A high voltage of about ~300V was required. For this reason,
There was a problem in that the scale of the drive circuit increased.

An object of the present invention is to reduce the scale of the drive circuit, reduce the number of drive electrodes, and reduce the drive voltage in order to solve the above-mentioned conventional problems, and is based on a new operating principle. An object of the present invention is to provide a gas discharge display device.

Means for Solving Problems] The gas discharge display device of the present invention includes a plurality of pairs of electrodes each pairing two adjacent strips of substantially straight strips arranged substantially parallel on a plane. , a first coating film made of a dielectric material that covers almost the entire surface of the electrode pair from the upper surface, and a substantially straight line-shaped enemy film disposed on the first coating film substantially perpendicular to the electrode pair. a first partition wall of an insulator, and a pair of these electrodes;
a first substrate made of an insulator, in which a first coating film and a first partition wall are sequentially laminated on one flat surface; and a substantially straight band-shaped transparent electrode arranged substantially parallel to the plane; , a substantially straight band-shaped light-shielding film disposed substantially parallel to the transparent electrode and alternating with the transparent electrode, and a second dielectric coating film covering substantially the entire surface of the light-shielding film and the transparent electrode. , a second bulkhead made of an insulator having a substantially straight line and arranged substantially perpendicular to the transparent electrode on the second coating film, and the transparent electrode, the light shielding film, and the second coating film. and a second substrate made of an insulator, on which a second partition wall is sequentially laminated and fixed on one flat surface, and the first and second partition walls are brought into almost perpendicular close contact, so that the first partition wall is attached to the light shielding film and the second partition wall is fixed to the light shielding film. and a container in which the first and second substrates are bonded by disposing partition walls facing each other in the space between the pair of electrodes, and the container is filled with an inert gas and hermetically sealed.

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゛j Next, the present invention will be explained with reference to the drawings.

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

In FIG. 1, on the upper surface of a substrate 1, which is a rear substrate, a pair of linear strip-shaped electrodes 2, which serve as rear electrodes, are arranged in parallel. Rectangular columnar partition walls 4 that are perpendicular to the electrode pair 2 at intervals are laminated one after another.

On the other hand, on the lower surface of the substrate 5, which is the front substrate, a linear plate-shaped transparent electrode 6 and a linear plate-shaped light shielding film 7 are arranged in parallel. Rectangular columnar partition walls 9 orthogonal to the electrodes 6 are stacked one after another.

The partition walls 4 on the back substrate 1 have the same spacing as the light shielding film 7 on the front substrate 5, and the partition walls 9 on the front substrate 5 have the same spacing as the electrode pairs 2 on the back substrate 1.

The substrate 1 and the substrates are stacked with the partition 4 of the back substrate 1 and the partition 9 of the front substrate 5 perpendicularly facing each other, and the partition 4 faces the light-shielding film 7 and is placed between the transparent electrodes 6 and The partition wall 9 is the electrode pair 2
It is placed between the two and fixed, injected with inert neon gas, and the surrounding area is hermetically sealed with crystallized glass.

In this example, the linear strip-shaped electrode pair 2 was formed by arranging two linear strip-shaped electrodes each having a width of 60 .mu.In in parallel with a gap of 60 .mu.m, and equally spaced at a pitch of 360 .mu.m. The formation method relied on aluminum sputtering. On the other hand, the transparent electrode 6 was formed of a material in which antimony was added to tin oxide by chemical vapor deposition. Note that the electrode pitch was 360 μm.

The dielectric coating films 3 and 8 were formed using a thick film printing technique using 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 coloring agent is added to the dielectric coating film 3 formed on the back substrate 1 to increase the contrast I- of the display.

The light-shielding film 7 formed on the front substrate 5 is made by using thick-film printing technology to create a paste composed of powder containing low-melting point lead glass powder, aluminum oxide powder and black coloring agent, and an organic binder. Formed. Film thickness is 10-20
It has the effect of increasing the display contrast in μm.

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 mixed with a powder material containing a black colorant and an organic binder. The film thickness is 40 to 60 μm. Partition wall 4
- The function of 9 is to maintain the gap between the opposing linear band-shaped electrode pair 2 and the transparent electrode 6 to about 100 μm and form a discharge space. The partition walls 4 and 9 further serve to 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, thereby preventing crosstalk.

Also, since it is black, it has the effect of increasing the contrast of the display. The partition walls 4 and 9 after molding usually have a hostile 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 electrode pair 2 to start discharging the neon gas filling the discharge space formed by electrode pair 2 and transparent electrode 6, and bring it into an excited state below the threshold value. to maintain it. In this state, transparent electrode 6 and electrode pair 2
When a voltage waveform sufficient to cause a discharge between the two electrodes is applied to the transparent electrode 6, a discharge is induced between the electrode pair 2. Utilizing this operation, by sequentially scanning the opposite-phase rectangular wave voltage applied to the electrode pair 2 and applying a voltage waveform sufficient to induce discharge to the transparent electrode 6 at an appropriate timing, the desired display butter>. Obtainable.

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

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

In FIG. 2, the column side electrodes X, -X646 correspond to the transparent electrodes 6 in FIG. 1. Also, the first row side electrodes Y, ~Y
2o and the second row side electrodes y1 to 5'20 have respective symbols Y, -yl to Yl -y2o, -.

Y2o-y1 to Y2o-y2o form a total of 400 electrode pair groups, and correspond to the linear band-shaped electrode pair 2 in FIG.

FIG. 3 is a waveform diagram showing an example of a rectangular wave voltage applied to the electrode configured as shown in FIG. In FIG. 3, a rectangular wave with an amplitude of 180 mm, a duty of 50%, and a frequency of IMIIz is applied to the first row electrodes y1 to y2o in the selected (ON) state, and in the non-selected (OF > state) The second row electrodes y1 to y2o are selected (ON).
In the state, the amplitude of the opposite phase of the first row side electrode Y, ~Y2o is 18
A rectangular wave of 0■, duty 50%, and frequency IMHz is applied, and is grounded in the non-selected (OFF) state. In addition, a rectangular wave with an amplitude of 30 V and a duty of 50% and a frequency of IMHz is applied to the column side electrodes X1 to X 640 in the selected (ON) state, with the voltage waveform being applied to the second row side electrodes y, ~y2o in opposite phase. In the non-selected (OFF) state, it is grounded.

Next, the timing of the applied voltage will be explained by taking as an example the case where the pixel AIO and the pixel Bll shown in FIG. 2 are displayed.

The display of the pixel AIO is realized by setting the row side electrode Yl-y (and the column side electrode The row side electrodes Yl and y2 and the column side electrode X2 are set to the selected (ON) state.

This is achieved by setting all the electrodes in that pond to the non-selected (OFF> state). In this way, the row-side electrodes are sequentially scanned and appropriate column-side electrodes X1 to X640 are selected or set to the non-selected state. A desired pattern display can be obtained by causing a discharge and maintaining the discharge. Incidentally, in this example, the amplitude of the drive voltage waveform was able to be driven at a low voltage of 30 V for the column side electrode. The number of row side electrodes could be reduced to 40, which is 17'10 of 400 pixels.

〔Effect of the invention〕

As explained above, by configuring one discharge space with three electrodes, the present invention can realize a lower driving voltage and a reduction in the number of driving electrodes, which has the effect of significantly reducing the size of the driving circuit. There is.

[Brief explanation of the drawing]

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 the driving power waveform. FIG. 1.5... Substrate, 2... Electrode pair, 3.
8...N-covered film, 4.9...Partition wall, 6.
...Transparent electrode, 7...Figure 1 1-1111-F'IIIIM-111
-----\ and second exercise 1 stick 1 2nd figure (OlJ) multi degree 11 lip shell 11 electric S figure 3 (OFF) (OFF> (OFF)

Claims (1)

[Claims] A plurality of electrode pairs made up of two adjacent strip-like electrodes arranged substantially parallel to each other on a plane, and a first covering of a dielectric material covering almost the entire surface of the electrode pairs from the upper surface. a first coating film, and a first ridge-shaped insulator having a substantially straight line disposed on the first coating film and substantially perpendicular to the electrode pair.
and a first substrate made of an insulator, in which these electrode pairs, a first coating film, and a first partition wall are sequentially laminated on one surface forming a flat surface; A linear band-shaped transparent electrode, a substantially linear band-shaped light-shielding film arranged substantially parallel to the transparent electrode and alternately with the transparent electrodes, and a dielectric covering almost the entire surface of the light-shielding film and the transparent electrode. a second coating film, a second partition wall of a substantially linear ridge-shaped insulator disposed on the second coating film substantially perpendicular to the transparent electrode, these transparent electrodes, and a light shielding film. film,
A second substrate made of an insulator on which a second coating film and a second partition wall are sequentially laminated and fixed on one flat surface, and the first and second partition walls are brought into close contact with each other at substantially right angles, and the first partition wall is attached to the first partition wall. A container having a light-shielding film and a second partition wall disposed facing each other in the space between the pair of electrodes, bonding the first and second substrates, and filling the inside with an inert gas for airtight sealing. A gas discharge display device characterized by: