JPS61142634A - Gas discharge type display device - Google Patents

Abstract

PURPOSE:To simplify a gas discharge type display device by providing a plural ity of parallel cathodes on a substrate with equal interval, providing parrallel anodes with equal interval orthogonally crossing the cathode on the surface plate and stacking them through barrier ribs. CONSTITUTION:The parallel cathodes 40 are provided on a substrate with equal interval, a dielectric material layer 30 such as glass paste is provided between them and the barrier rib 50 is provided thereon crossing the cathodes 40. Mean- while, a plurality of anodes 70 are provided in parallel with equal interval crossing the cathodes 40 at the rear surface of the transparent surface plate 60, the substrate and surface plate are stacked and sealed hermetically, forming a display device with filling of rare gas. A time series pulse voltage is applied to the cathodes 40 and a pulse voltage which is narrower than the cathode pulse is applied with superposition of pulse voltage according to a display signal. Therefore, a panel structure can be simplified and stable operation can be assured with provision of a drive circuit for each cathode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a particularly high-definition flat display device that displays characters, figures, etc. using gas discharge.

[Background of the invention]

Conventional high-density flat panel display devices using gas discharge.

Schematic diagram of Figure 1 (for example, SID, 1982 Di
glst,.

As shown in P2S5), a large number of cathodes 40 and a large number of barrier ribs 50 orthogonal to the cathodes 40 are provided on the substrate 10 through a large number of trigger electrodes 20 and a dielectric thickness 30, in the same direction as the trigger electrode 20, and on the other hand. , a large number of anodes 70 are provided on the back surface of the face plate 60 so as to be orthogonal to the cathode 40,
These substrates and a face plate are stacked, and a pulse voltage is applied between the cathode 40 and the trigger electrode 20 to generate an auxiliary discharge, and charged particles generated at this time are used to connect the cathode 40 and the A method is used in which a pulse voltage is applied between the anode 70 and a display discharge for displaying information. With this configuration, (1) the number of terminals and drive circuits for the trigger and cathode can be reduced to 2/n when the number of cathodes (number of display pictures) is n; (2) the display discharge can be reduced to a low voltage; It has great advantages, such as the fact that it can be generated at However, the trigger electrode 20
Furthermore, the dielectric layer 30 is required, which complicates the panel structure and drive circuit.

[Purpose of the invention]

An object of the present invention is to provide a high-definition gas discharge type display device that solves the problems of the prior art described above.

[Summary of the invention]

In the present invention, a plurality of parallel cathodes are provided on a substrate at regular intervals, and on the other hand, anodes that are parallel to each other and at equal intervals are provided on the back side of the face plate, intersecting with the cathodes, and the face plate is connected to the base plate through barrier ribs forming a discharge space. A panel is constructed by superimposing the and the substrate, and the cathode receives a time-series pulse voltage train, and the anode receives a signal in which a continuous pulse voltage for forming an auxiliary discharge and a pulse voltage according to display information are superimposed. The present invention is characterized in that by adding , information display can be achieved reliably at low voltage, thereby solving the problems of the prior art described above.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIG. 2 (section view of type II).
, Figure 3 (schematic exploded perspective view), Figure 4 (drive waveform during positive display), Figure 5 (drive waveform during negative display), and Figure 6 (drive waveform when DC potential is applied). I will explain using

As shown in FIGS. 2 and 3, on a substrate 10 made of glass etc., a plurality of parallel and equal FIj
The cathode 40 of llJt is formed using techniques such as thick film, thin film, and plating. Note that the line width of the cathode at 4° is 0.03
~0.3 mm and a pitch of about 0.1 to 0.5 mm is appropriate. In addition, in order to prevent short circuits between the electrodes, a dielectric layer 30 (printed and baked with glass paste, etc.) is provided between the cathode 4o.
(The height is preferably higher than the cathode 40 and lower than the height of the barrier ribs described in the first section). Next, Yin t
! Barrier ribs 50 that are parallel to each other and intersect with 40 are provided by printing and baking glass paste or the like.

Note that the barrier ribs 5o may be formed using glass fiber. The width of the barrier rib 5o is 0.05 to 0.2
mm, and the appropriate height is about 0.05 to 0.5 mm. The barrier ribs 5o may be provided so as to be parallel to the anode 7o after the anode 70 is formed on the face plate 60, which will be described next. On the other hand, on the back side of the transparent face plate 6o made of glass or the like, a plurality of anodes 70 made of a transparent conductor such as Ni or indium oxide are provided parallel to each other and spaced equally apart (the pitch is the same as the barrier ribs 5°). In order to increase the contrast of the display, a black film 90 formed by printing and baking a black glass paste or the like is provided except for the display section 8o. Further, in the case of color display, the display section 80 is provided with a phosphor (not shown). Furthermore, if necessary, the face plate 6
It is preferable to process the surface of 0 into a total reflection surface to prevent a decrease in visibility due to reflection of external light.

A substrate 10 and a face plate 6 on which electrodes and the like are formed as described above.
0, the cathode 40 and the anode 70 intersect, and the anode 70
The surroundings of the overlapping 2 are hermetically sealed to withstand high vacuum so that they are located between the barrier ribs 50, and then heated and evacuated to a high vacuum to remove the discharge space 110 formed by the barrier ribs 50.
N e Ar * N e −X e , He
−Xe, Xe and other rare gases as the main components lO~
Enclose at 600 Torr. Note that a small amount of Hg may be mixed in to reduce sputtering of the electrode.

Next, an embodiment of the driving method of this panel (for positive display) will be described with reference to FIG. The time-series pulse width t (1
A cathode pulse voltage (cathode pulse) of 0 to 300 μs) and an amplitude of -■ is applied to each anode terminal A (70 in Fig. 3) with a pulse width t (0.5 to 20 μs) for generating an auxiliary discharge. A continuous pulse voltage (auxiliary discharge pulse) with synchronization t and amplitude V and a pulse width of 1 (1 (
1<1), DS D of amplitude V
k Apply the A display pulse superimposed on the auxiliary discharge pulse (anode pulse)
. These pulses may be composed of a pulse train t having a narrow pulse width as shown in the figure.

FIG. 5 shows the anode applied voltage waveform (anode pulse) during negative display. In this voltage waveform, the pulse width t' of the display pulse is smaller than the auxiliary discharge pulse t' (t
>t'>t') Therefore, the element corresponding to one display part number is displayed with low brightness, and the other elements are displayed with high brightness.

In this case, since there are many elements that emit light with high brightness, the electrical coupling between the elements becomes large, and there is an advantage that the operating voltage can be lowered and a large operating margin can be obtained.

Note that the cathode pulse width t' at this time is smaller than t in FIG. 4 (t'<t)k
k
You can also do k.

FIG. 6 shows the pulse waveform when a DC bias voltage E is applied between the cathode pulse and the anode pulse. When a DC bias is used in this manner, the voltage amplitude of each pulse can be reduced, reducing the burden on the drive circuit, which is a great advantage in terms of IC implementation, etc.

〔Effect of the invention〕

According to the present invention, the panel structure is the simplest, a large operating margin for stable operation is obtained by providing a drive circuit for each cathode, a large contrast ratio that is easy to see is obtained, and the operating voltage is reduced. What I did.

There are advantages such as reduced visibility. Furthermore, by applying a DC bias voltage between the cathode pulse and the anode pulse, the voltage amplitude of each pulse can be reduced, making it suitable for IC implementation.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view showing a panel according to the present invention, Fig. 3 is an exploded perspective view of the panel in Fig. 2, and Fig. 4 is a drive during positive display according to the present invention. Voltage waveform, Figure 5 is the drive voltage waveform during negative display, Figure 6
The figure shows the drive voltage waveform when a DC bias voltage is applied. Description of symbols 10... Substrate, 20... Trigger electrode, 30... Dielectric layer, 40... Cathode, 50... Barrier rib, 60
...face plate. 70...Anode, 80...Display part, 90...Black film. 100...electrode, 110...discharge space kudzu 2 figure fi ¥3 figure figure 4

Claims (1)

[Scope of Claims] 1. At least a plurality of cathodes are provided on a substrate parallel to each other and spaced apart from each other, a plurality of barrier ribs that are parallel to each other and intersect with the cathodes are provided thereon at equal spaces; A plurality of anodes are provided parallel to each other and at equal intervals so that the cathode and the anode intersect, and the anode is located between the barrier ribs, and further, face plates are overlapped to airtightly seal the periphery and fill with gas. Gas discharge type display device. 2. At least a time-series cathode pulse voltage is applied to the cathode, and an anode pulse voltage applied to the anode is a continuous pulse voltage that corresponds to at least the cathode pulse and is narrower than the cathode pulse width in accordance with the display signal. 2. The gas discharge type display device according to claim 1, wherein a positive display is performed by applying a pulse voltage in a superimposed manner. 3. The anode pulse voltage applied to the anode is characterized in that a continuous pulse voltage corresponding to at least the cathode pulse voltage and a pulse voltage with a narrow pulse width corresponding to the display signal are applied in a superimposed manner to display a negative display. A gas discharge type display device according to claim 1. 4. The gas discharge type display device according to claim 2 or 3, characterized in that a DC potential is applied between the cathode pulse voltage and the anode pulse voltage.