JPS5843751B2 - Self-shift Gatagas Hoden panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-shifting gas discharge panel, and more particularly to a self-shifting gas discharge panel that allows writing or erasing at any point during self-shifting operation.

A self-shifting gas discharge panel, known as a self-shifting plasma display panel, has electrodes a 1 , b 1 tcLdLa2 . b2,
A substrate provided with . It is coated with a dielectric layer such as low melting point glass, and shift voltages VA-VD are applied to the shift buses A to D at four-phase timing as shown in FIG. 2, and the common bus Y is Either it is grounded or a pulsed voltage selected in relation to the shift voltage VA-VD is applied.

Note that the shift voltages VA-VD are voltages each consisting of a pulse train, but are shown in an envelope shape for simplification.For example, if the common bus Y is grounded, the shift voltages VA- It consists of positive and negative pulses with peak values corresponding to the sustaining voltage.

For example, when voltage VA is applied to bus line A, electrode a
1. Assuming that a discharge spot has occurred at the opposing intersection of y3, when voltage VB is applied to bus B, electrodes b1. The discharge spot shifts only to the opposing intersection of y3.

Thereafter, the discharge spot is similarly shifted to the right along the direction of the electrode y3 by applying the voltages VC and VD.

The first discharge spot is generated by selecting a write electrode (not shown) based on input information and applying a write voltage higher than the discharge start voltage to the selected write electrode.

However, if erroneous writing is performed, the display will be shifted and displayed as is by a shift operation, and the erroneously displayed content cannot be erased unless it is shifted to the right.

When erroneous writing is determined, the shift direction is shifted and the order of voltages VA-VD is changed to VD, VC, VB.

It is possible to reverse the order of VA and return the erroneously displayed contents to the writing side, but in a state where the erroneous display contents are shifted halfway, by returning to the original state, the contents written afterward will be erased. This has the disadvantage that rewriting must be performed, which makes the operation complicated.

Also, as mentioned above, the content written from one end can be shifted and displayed toward the other end, which has the advantage of requiring fewer writing drivers, but it is not possible to write at any arbitrary point in the middle. .

The present invention is a novel invention that improves the above-mentioned drawbacks,
Its purpose is even during the shift operation.

It is an object of the present invention to provide a self-shifting gas discharge panel that allows writing or erasing at any point and correcting erroneous writing.

Examples will be described in detail below.

FIG. 3 is a detailed explanatory diagram of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts.

In this embodiment, in addition to the shift buses A-D, the erase bus E
and a write bus F, and an electrode d3 to be connected to the bus F.
．． di, dn-1 are connected to buses D and E by the switching circuit side.
, F.

Also, electrodes al)bl)cl, a1ta2+...
The electrodes y1 to y7 perpendicular to ... are independently derived, and each has a driver (not shown) for applying a pulse voltage.
It is connected to the.

This driver generates a pulse voltage whose phase, polarity, and peak value are selected in relation to the pulse of the shift voltage VA-VD, and can also selectively generate an erase pulse or a write pulse. It is.

As shown in FIG. 4, the shift voltages VA to VD applied to the shift buses A to D have the same timing as in the conventional example, and the voltage VE applied to the erase bus E is synchronized with the erase pulse EP.
The voltage VF applied to the write bus F includes the write pulse WP.

Electrodes al, bl jcl, al, a2. In a state in which """ is periodically connected to the shift bus line A-D, that is, in a state in which the electrodes d3, di, and dn-1 are also connected to the bus line by the switching circuit y, the electrodes y1 to y7 By applying a pulse voltage to and applying shift voltages VA-VD to shift buses A-D, the same shift operation as in the conventional example can be performed.

Further, by continuously applying a pulse voltage to any one shift bus bar or two adjacent shift bus bars, the shift operation can be stopped and a static display can be performed.

In addition, when performing an erasing operation, for example, when erasing is to be performed at the time of shifting to the electrode d3, immediately before that, the electrode d3 is switched to the erasing bus E, and the electrode d3 and the electrodes y1 to yγ are connected.
An erasing pulse is applied at the same timing as the erasing pulse EP of the voltage VE to the electrodes y1 to y7 selected depending on which discharge spot at the opposing intersection is to be erased, and the erasing level voltage is set by voltage matching. The selected discharge point can be erased as follows.

Note that selective discharge points can also be erased by employing other erasing methods employed in matrix-type plasma display panels.

Therefore, when the shift voltage VA is next applied to the shift bus A, only the discharge spots of the discharge points that have not been erased on the electrode d3 will be shifted onto the electrode a4, and any The points can be erased.

In addition, when performing a write operation, for example, when writing is performed at the electrode di, the electrode di is connected to the write bus F via the switching circuit V, and a voltage containing the write pulse VF is applied at the same timing as the voltage VD, and a write pulse is also applied to the selected voltages @y1 to y7, and a voltage that is higher than the write level due to voltage matching is applied to the selected discharge point, thereby By generating a discharge spot and then applying a shift voltage VA to the shift bus A, the discharge spot can be shifted.

That is, it is possible to write at any point during the shift operation.

In this case as well, writing can be performed using other writing methods used in matrix type plasma display panels.

Further, the voltages VE and VF can be generated periodically as shown in the figure, but they can also be generated only at the timing of erasing or writing by a command.

Also, electrode d3. which is not directly connected to the bus bar. di. A driver is connected to each dn-1, and during normal shift operation, the driver generates the same voltage as the voltage applied to the busbar, and only when erasing or writing, the selected driver generates an erase pulse or write. It can also be configured to generate an embedded pulse.

Also, if the period of shift voltage VA-VD is relatively slow,
Erasing of the points and writing of other points can be performed continuously.

As explained above, the present invention independently derives a plurality of orthogonally opposing electrodes from electrodes periodically connected to a plurality of shift buses, and selectively applies a voltage to the electrodes. and any one of the shift busbars.
By deriving an arbitrary electrode to be connected to the bus bar and applying a shift voltage to that electrode, normal self-shift operation can be performed, and when the discharge spot is shifted, an erase pulse can be applied. It is possible to erase a discharge spot at an arbitrary point.

Furthermore, at the timing when the discharge spot is shifted,
By applying a write pulse, it is possible to write to any point and shift the written contents by a subsequent shift operation.

In other words, it has the self-shift feature as it is, and like a matrix type, it can erase and write at any selected position, and it can easily correct erroneous writing or perform additional writing. be.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the electrode arrangement of a conventional self-shifting plasma display panel, and Figure 2 is an explanatory diagram of its operation.
FIG. 3 is an explanatory diagram of the electrode arrangement of the embodiment of the present invention, and FIG. 4 is an explanatory diagram of its operation.

Claims (1)

[Claims] 1. It has electrodes periodically connected to a plurality of shift buses, and a plurality of electrodes arranged to face each other perpendicularly to the electrodes via a discharge gas-filled space, and each of the plurality of electrodes has a selected electrode. Of the electrodes to which a driver capable of operating is connected and which is to be connected to any one of the shift busbars,
A self-shift type gas discharge panel characterized in that arbitrary electrodes are separated and derived so that a shift voltage, a voltage including an erase pulse, and a voltage including a write pulse can be selectively applied.