JPS5914855B2 - Panel type display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a panel using gas discharge that displays information such as characters and graphics by selectively controlling discharge of a large number of display element chambers arranged in a matrix pattern. The present invention relates to a type display device.

This type of display device is widely known as a gas discharge type character display, and display element portions are provided at portions corresponding to the intersections of a large number of cathodes and anodes in the mutually orthogonal X and Y directions, respectively. configured to set.

Then, select a large number of cathodes and anodes, identify the intersection, apply a high voltage between the cathode and anode at the identified intersection to cause a gas discharge, and display a dot corresponding to the intersection. A set of display dots is used to display a predetermined character or figure.

A in FIG. 1 shows a conventional example of one display element chamber of the above-mentioned display device, in which a back plate 11 and a front plate 12 made of a glass plate or the like are separated by a small gap. They are set to face each other, and a discharge gas is filled in the gap between them.

A large number of display element chambers 14 are formed in a matrix between the back plate 11 and the front plate 12 by a large number of ribs 13 made of an insulating material and a large number of ribs perpendicular to the ribs 13 (not shown in the figure). A cathode 15 made of nickel or the like is formed on the surface of the element chamber 14 corresponding to the back plate 11.

An anode 16 facing the cathode 15 is formed on the inner surface of the surface plate 12 using, for example, a silver wire.

In this case, the surface plate 12 becomes a display surface, and the display element chamber 14
Since it is necessary to see the discharge display inside from the outside, it is constructed of a transparent plate, and the anode 16 is set in a corner on one side of the element chamber 14 so as not to limit the display.

An insulating barrier 17 is formed with a small gap in a corner of the cathode 15 of the back plate 11 corresponding to the anode 16, and a pilot part 18 is set.

That is, in such a display device, the cathode 1 is always
A small voltage is applied between the anode 16 and the anode 16 so that the pilot flame is discharged at the pilot flame section 18 which is the closest to the two.

Then, when a large voltage for display driving is applied between the cathode 15 and the anode 16, the discharge of the pilot part 18 is spread over the entire surface of the cathode 15 as shown in B in FIG.
A dot is displayed using one display element chamber 14.

However, in the case of the electrode structure as described above, the portion close to the pilot part 18 discharges and emits light well, but the part away from the pilot part 18 does not discharge and emit light well. The actual light emitting area is in a state shown by diagonal lines in C in FIG. 1, which is insufficient for displaying with sufficient brightness and excellent resolution.

This invention was made in view of the above points, and it is possible to ensure that discharge light is emitted throughout the divided display element chambers, thereby realizing character display with sufficient brightness and good resolution. The present invention aims to provide a panel-type display device that enables this.

An embodiment of the present invention will be described below with reference to the drawings.

A in FIG. 2 is a cross-sectional view of a portion corresponding to one display element chamber 140, and this element chamber 14 is divided by ribs 13 as in the case of FIG. A cathode 15 is formed on the surface.

In this case, the ribs 13 are separately formed on the back plate 11 side and the front plate 12 by appropriate screen printing means, and by setting the back plate 11 and the front plate 12 facing each other, the display element chamber 14 can be partitioned. be done.

On the inner surface of the surface plate 12 of each display element chamber 14, anodes 16a and 15b made of silver wire are separately set at corners on both sides in a direction perpendicular to the direction in which the cathode 15 extends.

This anode 16a. Although not shown, the electrodes 16b are connected in common, and a voltage is applied between them and the cathode 15.

Barriers 17a and 17b are applied to the cathode 15 surfaces corresponding to the two-divided anodes 16a and 16b, respectively.
The pilot lights 18a and 18b are set by the following steps.

Note that the inner surface of the surface plate 16 has ribs 13 and an anode 16a.
, 16b, a mask 19 may be formed in black or the like to visually clearly divide each display element chamber 14.

That is, in a display device configured in this way,
By constantly applying a small voltage between the anodes 16a, 16b and the cathode 15, a second
The pilot flame is set as shown in B in the diagram.

When a predetermined display drive voltage is applied between the anodes 16a, 16b and the cathode 15, the pilot lights 18a on both sides
, the discharge operation quickly moves from 18b toward the center,
The display state is set with very good responsiveness.

Moreover, since the anodes 16a and 16b are set on both sides,
As shown in FIG. 2C, an averaged discharge area is set over the entire surface of the cathode 15, and a dot display with sufficient brightness is displayed.

As described above, according to the present invention, in a large number of display element chambers arranged in a matrix, the discharge lighting starting state is improved, and character display control with excellent responsiveness can be executed. As long as an effective discharge operation is carried out in the element chamber that constitutes each display dot, its brightness will be sufficient.
This is highly effective in improving the functionality of a character display device.

[Brief explanation of drawings]

Figure 1 is a diagram explaining a conventional display device, where A is a cross-sectional view and B is a cross-sectional view.
is a diagram showing the pilot fire area, C is a diagram showing the discharge area, 2nd
The figures are diagrams for explaining a display device according to an embodiment of the present invention, in which A is a sectional view, B is a diagram showing a pilot flame area, and C is a diagram showing a discharge area. 11... Back plate, 12... Front plate, 1
3a. 13b...Rib, 14...Display element chamber, 15...Cathode, 16a, 16b"=
・Anode, 17a, 17b... Barrier, 18a,
18b... Pilot part.

Claims (1)

[Claims] 1. A back plate and a front plate that are set to face each other with a small gap between them and seal discharge gas therebetween, a number of first electrodes that are formed to extend parallel to the inner surface of the back plate, and the first electrodes. a number of ribs protruding from the inner surface of the back plate at specified intervals so as to intersect with the electrodes thereof, dividing the first electrode surface in correspondence with the display elements; and a second electrode formed to extend in a direction intersecting the first electrode, corresponding to both sides of each of the ribs, and a range defined by the plurality of ribs on the first electrode surface. A panel type display device comprising: a plurality of insulating barriers forming a pilot flame section in a small section area facing the second electrode on both sides of each of the plurality of ribs.