JPS6156517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an improvement of an AC discharge type gas discharge panel in which a shift section for shifting or scanning discharge spots and a display section for displaying a desired information pattern based on a combination of discharge spots are arranged adjacent to each other. In particular, the present invention relates to a new scanning gas discharge display panel in which the electrodes of the display section are separated for each unit of information to be displayed to improve operational functionality.

Conventionally, from the viewpoint of simplifying the drive circuit in a dot matrix type gas discharge panel, discharge spots generated at one end are sequentially shifted toward the other end according to written information, and the shift is stopped at a desired position to stand still. Self-shifting gas discharge panels for display have already been proposed in various configurations. However, in such a self-shifting gas discharge panel, the display pattern itself shifts sequentially according to the written content, so the display pattern, that is, the character information, continues to flow on the screen until it shifts to static display operation. This has the disadvantage of increasing operator fatigue, especially when the rewritten display is frequently performed.

Therefore, in order to eliminate this drawback, a shift part that shifts the discharge spot as a pilot flame and a display part that generates a discharge spot for display by using the pilot flame effect of the discharge spot of this shift part are installed side by side. For example, a scanning gas discharge panel with a
52-63650 etc.

That is, FIG. 1 is a plan view showing the electrode arrangement of an example of such a scanning gas discharge panel.
As is clear from the relationship with FIGS. 2 and 3, which show cross sections along the lines L _{1 -L 1} ' and L 2 -L ₂ ', on the substrate ₁ made of glass or the like, there are X ₂ and two groups of shift electrodes x1li regularly connected to them,
x2li and an electrode xd1li connected to the shift electrode,
xd2li (l, i=1, 2, 3, . . . ) and a write electrode Wi connected to the write bus WB. Moreover, on the other substrate 2, there are busbars Y ₁ and Y ₂ and two other groups of shift electrodes y1lj, y2lj (j=1, 2, 3...) regularly connected to them and connected to the terminal Zl. A display electrode ydl is provided. These electrodes are covered with dielectric layers 3 and 4 on the respective substrates, and are arranged opposite to the first write electrodes W ₁ , W ₂ , ...Wl, which are disposed opposite to each other with a space 5 filled with discharge gas. A write discharge cell W is formed between the Y-side shift electrode y111, and a shift discharge cell A-D is formed between the X-side shift electrodes x1li, x2li and the Y-side shift electrodes y1lj, y2lj. A shift portion is formed by the cell arrangement.

Furthermore, the electrodes xd1li, xd connected to the X side shift electrode
A display section adjacent to each shift section is formed by discharge cells Bd and Cd between the display electrode ydl and the display electrode ydl. In such a configuration, the discharge spots are sequentially shifted from the write discharge cell W of the shift section, and a write voltage corresponding to the information signal to be displayed is applied to the display electrode corresponding to the shifted position of the discharge spot.
If ydl is sequentially applied, discharge spots are generated in the display discharge cells of the display section due to the selective pilot effect from the discharge spots during shifting, and a display pattern can be written.

Therefore, the display content itself does not shift, but is memorized by the wall charges on the dielectric layers 3 and 4, so that the discharge spot in the shift portion only needs to be shifted during the write cycle.

On the other hand, as a means of erasing part of the display content that has already been written, the discharge spot of the shift section is shifted to a position corresponding to the section to be erased on the display section, and the discharge spot is held at that position for several cycles or more, over several tens of cycles. and discharge continuously. As a result, the wall charges of adjacent display discharge cells are neutralized by the space charges and disappear, allowing an erasing action to be performed. At this time, since the discharge spot of the shift section is not near the discharge point of the other display section, the written content is retained without affecting the wall charge. However, in this erasing method, the shift time from the write discharge point W of the shift section until the discharge spot is shifted to the position to be erased on the display section and the erase time required for neutralization and disappearance of the wall charge are added to the write time. It has the disadvantage that it takes about 1ms longer than that, and it is difficult to perform rewriting and editing operations associated with partial deletion on panels with long lines or multi-line character display panels.

The present invention has improved the above-mentioned conventional drawbacks, and its purpose is to quickly and reliably erase arbitrary display block units when partially modifying written display contents without complicating the structure within the display panel. The object of the present invention is to provide a gas discharge panel with good operability. In order to achieve this object, the present invention provides two
A shift portion of a discharge spot consisting of a periodic arrangement of a plurality of shift discharge cells constituted by each intersection of shift electrodes of a plurality of groups regularly connected to a set of busbars; In a gas discharge panel equipped with a display section consisting of an array of display discharge cells provided adjacent to each other on one side, the display discharge cell array is connected to a display electrode common to the cell arrays, and a common display electrode. A plurality of shift electrodes, which are arranged opposite to the electrode and commonly connected to a plurality of shift electrodes belonging to each bus bar of the one set, and further connected to the display discharge cell and belong to each bus bar of the one set. The present invention is characterized in that the shift electrodes of the group are derived separately and independently for each unit necessary to constitute the information pattern to be displayed.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

FIG. 4 is an electrode arrangement diagram for conceptually explaining the structure of the present invention in comparison with the conventional example described above. In this case, the electrode arrangement is changed from the conventional structure shown in FIG. 1 to a linear pattern for simplicity. It is represented by a modified pattern. In FIG. 4, for example, X11 and
1. The electrodes are configured separately for each character, such as X12 and X22, and X _1o and X _2o , making it possible to selectively erase each character by directly applying an erasing pulse to any displayed character position. .

FIG. 5 is an embodiment specifically showing the electrode configuration conceptually explained with respect to FIG. 4, and the same parts are designated by the same reference numerals. As is clear from FIG. 5, one electrode that opposes the display electrode ydl and defines the display discharge cell is shared with the X-side shift electrode, and the terminals X _21a and X ₁₁ are independent for each character.
_a ...X _2oc and X _1oc are derived.

For writing display, as in the conventional case, a writing pulse having a discharge start voltage or higher is applied to the bus line WB to generate a discharge spot for scanning shift at the writing discharge point W. Thereafter, by periodically applying a predetermined pulse signal to the shift section, the discharge spots are sequentially shifted using the pilot flame effect, and the display electrode is shifted in accordance with the shift position of the discharge spot, for example, discharge cell B for shift. By applying a predetermined write signal pulse to terminal Z1 of yd1, the display discharge cell
A discharge spot can be generated in Bd, and when the discharge spot is shifted to the shift discharge cell C, a discharge spot can also be generated in the paired display discharge cell Cd.

In addition, in order to erase some characters of a character string that has already been written, in the present invention, the bus lines X ₁ and X ₂ connected to the maintenance driver are separated for each character.
1a and X21a, X12b and X22b, X1nc
_{and _} By directly applying a level narrow erasing pulse, it becomes possible to instantly erase the character display spot without affecting the discharge cells of other non-selected display areas.

Therefore, if the conventional example and the present invention are further explained with reference to FIG. 6 in the case of partially correcting the character display, for example, as shown in FIG.
In order to erase the D in the square in Figure b and rewrite it to the letter C in the display written as ABDDEF, conventionally, the same character pattern as the character to be erased or the discharge spot of the entire one character area was first placed in the shift area. By shifting and neutralizing the wall charge of the display spot at the position of the character spot to be erased,
As shown in Figure C, the character D is erased, but in the present invention, the shift part is not used for erasing, and the By applying an erase pulse with a controlled pulse width from a sustain driver connected to the shift electrode terminal, the discharge spots of the entire character can be erased all at once very easily as shown in FIG. 6C. For subsequent correction writing, as in the conventional method, the discharge of the shift section was shifted to the corresponding position of the erased character and a signal corresponding to the character C was applied (Fig. 6d), and that character was temporarily memorized. After that, if a sustaining voltage is applied in common to all display discharge cells, the correction and rewriting is completed as shown in FIG.

As explained above, the present invention erases any character unit in a single line multi-character display by configuring the electrodes to separate the bus lines X ₁ and X ₂ connected to the maintenance driver for each character unit. At this time, by applying a required erasing pulse from a sustain driver connected to each separated X-side shift electrode terminal, it becomes possible to easily selectively erase a desired character unit. Furthermore, since direct erasing is performed using an erase pulse, the erasing operation has the advantage of being able to be performed in a very short time, allowing quick correction writing and significantly improving operability. Furthermore, since the erase operation is performed only by the sustain driver, there is no need for an increase in the number of write drivers or a new erase driver.

It should be noted that it is effective to separate the sustain driver as in the present invention from the viewpoint of reducing the increase in load capacity even in multi-row type display panels, etc., and it goes without saying that the electrode configuration of the present invention can be similarly applied. There is no such thing.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the conventional electrode arrangement, Figures 2 and 3 are cross-sectional views taken along the lines L ₁ - L ₂ ' and L ₂ - _{L 2} ' in Figure 1, and Figure 4 is the conventional electrode arrangement. Figure 5 is a diagram conceptually explaining the configuration of the present invention in comparison with the electrode configuration of the present invention.
FIG. 6 is an explanatory diagram of the operation of partially correcting displayed characters. X ₁ , X ₂ , Y ₁ , Y ₂ : bus bar, WB: write bus bar,
Zl: Display terminal, x1li, x2li, y1lj, y2
lj: Electrode constituting the shift section, Wl: Write electrode,
ydl: display electrode, X _11a , X _12b , X _1oc , X _21a , X
_22b , X _2oc : Bus terminal for each character.

Claims (1)

[Claims] 1. A shift section of a discharge spot consisting of a periodic arrangement of a plurality of shift discharge cells constituted by each intersection of shift electrodes of a plurality of groups regularly connected to two sets of busbars each having a plurality of phases. , a display section comprising an array of display discharge cells provided adjacent to one side of the shift discharge cell array, the display section comprising a display discharge cell array provided adjacent to one side of the shift discharge cell array; an electrode, and an electrode that faces the common display electrode and is commonly connected to a plurality of groups of shift electrodes belonging to each bus bar of the one set, and further connected to the display discharge cell. A gas discharge panel characterized in that a plurality of groups of shift electrodes belonging to each bus line of the set are separated and independently derived for each unit necessary to constitute an information pattern to be displayed.