JP3096113B2 - Gas discharge display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge display panel and, more particularly, to a discharge current limiting resistor provided for each discharge cell and a terminal arrangement thereof.

[0002]

2. Description of the Related Art For each discharge cell of a gas discharge display panel,
The resistance added in series to limit the discharge current limits the discharge current of the discharge cell to the normal glow discharge area, reduces spatter, and maintains the memory effect in the DC memory type discharge display panel. There is.

An example of this is disclosed in, for example, Takano et al., "Pulse Memory Drive of Discharge Display Panel with Resistor", 1990, Annual Conference of the Institute of Television Engineers of Japan, pp. 77-78.

FIG. 2 shows a schematic diagram of the structure of the gas discharge display panel shown in this report, and the prior art will be described based on the schematic diagram. FIG. 2A is a plan view showing a part of the gas discharge display panel, and FIG. 2B is a plan view of FIG.
FIG. ₂ is a cross-sectional view (cut surface A ₁ -A ₂ ) of FIG. FIG. 2A shows a fracture surface B ₁ -B ₂ .

In this example, a cathode 4 is provided on a front glass substrate 8.
However, an anode bus 1 and an auxiliary anode 5 are formed on the rear glass substrate 9 at right angles to the cathode 4, and a discharge cell 7 surrounded by a bank 6 is formed at each intersection of the anode bus 1 and the cathode 4. . A resistor 13 is formed in the discharge cell 7 between the anode bus 1 and the anode 3 in an L-shape.

The operation will be briefly described. Certain cathode 4
When a prescribed voltage is applied to the anode bus 1 and the anode bus 1, a current flows through the resistor 2 at the cell 7 at the intersection thereof, and a discharge occurs between the anode 3 and the cathode 4. The phosphor 12 emits light by the ultraviolet light generated at this time. In this way, a specific discharge cell in the panel can emit light. This light emission is radiated to the outside through the front glass substrate 8. By making the phosphor 12 red, green, and blue for each discharge cell, a full-color television image can be displayed. The white glass back 10 is for insulating the electrodes and efficiently extracting the light emitted from the phosphor to the outside. The auxiliary anode 5 generates a discharge between the auxiliary anode 5 and the cathode 4 in advance, and promotes the start of discharge of the discharge cell 7 through the slit 11.

[0007] In the DC type panel mentioned above as an example,
Operating with a small current increases the efficiency, and also prevents deterioration due to sputtering and prolongs the service life. For this purpose, a resistor 2 for limiting the discharge current is provided for each cell.

In the prior art, a resistor for forming this resistor is individually formed in each cell in an L-shape as in this example.

[0009]

A large gas discharge display panel is manufactured by, for example, thick film printing. However, in the prior art, in particular, the size and thickness of a resistor forming a resistor vary in manufacturing. There is a disadvantage that the resistance value greatly varies depending on the precision of the above. Further, the resistance value varies depending on the position and size of the electrode terminating the resistance. If the resistance value varies, there is a problem that the discharge current of each cell, and hence the light emission output varies, and appears as noise on the screen.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a gas discharge display panel provided with a resistor having a resistance shape whose manufacturing accuracy does not affect its resistance value and a terminal electrode thereof. Is what you do.

[0011]

In order to achieve the above object, a gas discharge display panel according to the present invention comprises a front plate and a back plate, and the face plates have a large number of striped cathodes arranged in parallel and perpendicular to each other. To have a large number of striped anode bus groups arranged side by side in parallel with the group, to form a large number of discharge cells in a matrix by spacers or partition walls, and to limit the discharge current of each discharge cell to each discharge cell In the gas discharge display panel provided with the above-described resistors, the resistors are provided in two adjacent anode buses and substantially at the center between the two anode buses, and are discharged to the discharge cells in pairs with one cathode. And a resistor for forming a resistor extends in the anode bus direction sharing the two anode buses. It is characterized in that formed over several discharge cells.

In another embodiment of the present invention, a branch anode bus is formed to project from the anode bus in a direction perpendicular to the anode bus so as to form a pair corresponding to each discharge cell. The resistor is terminated by a pair of protruding branch anode buses and an anode provided substantially at the center thereof, and the resistor is formed as a band-shaped resistor having a width smaller than a distance between two adjacent anode buses. Is formed so as to extend.

In still another embodiment, a branch anode bus is formed by bridging between the adjacent two anode buses so as to form a pair corresponding to each discharge cell, and the resistor is connected to the one anode bus. A pair of bridged branch anode buses, the two anode buses, and the anode are terminated.

In still another embodiment, the anode bus,
The branch anode bus, the anode and the cathode correspond to the cathode bus, the branch cathode bus, the cathode and the anode, respectively, and the anode and the cathode are arranged on the front plate and the back plate, respectively. It is.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows the configuration of one embodiment according to the display panel of the present invention. FIG. 1A is a plan view showing a part of the gas discharge panel, and FIG. 1B is a sectional view (cut surface C ₁ -C ₂ ) of the panel shown in FIG. 1A.

In FIG. 1, the parts denoted by the same reference numerals as those in FIG. 2 have the same functions as those of the panel described in the section of the prior art, and the operation is the same. The shape of such a resistor will now be described.

In FIG. 1, a resistor 13 is formed in a band shape below a pair of parallel anode buses 1 over a plurality of discharge cells which are larger than the anode buses 1 and have a common anode bus. The anode 3 is formed substantially at the center of the two anode buses 1 and terminates the resistor 2 together with the anode bus 1.

At this time, the condition of the distance between the adjacent anodes 3 along the direction of the anode bus 1 will be described with reference to FIG. FIG. 6 shows that the size of the anode is 2 as shown in (a) and (b).
× 2, when the distance between the anode and the anode bus is 1, and when the distance between the adjacent anodes is m, the resistance value of the resistor terminated between the anode 3A and the anode bus 1 is expressed by (a) the anode 3B adjacent to the anode bus When the same potential as 1 (0V) and (b) the next anode 3B has the same potential as the anode 3A (1V)
Are obtained by numerical calculations in the case of. FIG. 6 (c) shows the result. According to this, if m is set to 6 or more, the influence between adjacent anodes can be reduced to 1% or less.

The resistance 2 thus formed has a resistance value of
It is not affected by variations in the shape and dimensions of the resistor 13. Also, there is no influence of the end of the resistor 13 where the thickness of the resistor 13 varies most.

The effect of the position and size of the anode 3 for terminating the resistor on the resistance will be described in detail with reference to FIGS.

FIG. 7 shows the resistance value of the resistor 2 terminated by the anode and the anode bus when the anode 3 is displaced vertically toward the anode bus 1 by numerical calculation. As shown in FIG. 7 (a), when the size of the anode is 2 × 2, the distance between the anode and the anode bus is 1, and the shift is d (relative value), the change in resistance value due to the shift d is shown. Is (b). The deviation is 0.1 (equivalent to 10%) and the change in resistance is less than 1%. It is clear from FIG. 6 that the displacement parallel to the anode bus has no effect on the resistance value.

FIGS. 8 and 9 show the results of numerical calculations of the effect of the size of the anode 3 on the resistance value, with respect to a change parallel to the anode bus 1 and a change perpendicular thereto. According to these, to make the change in resistance value within 1%, for example, 2% in the direction parallel to the anode bus 1 and 1.3% in the direction perpendicular to the anode bus 1.
It can be seen that the accuracy is within%.

The resistance shape of the gas discharge display panel according to the present invention is not limited to that shown in FIG. 1, and the anode bus 1 may be provided below the resistor 13, for example, as shown in FIG. In this case, as shown in FIG. 3, the resistor 13 may not only be formed large outside the anode bus 1, but may be formed so as to just fit on the anode bus 1.

As shown in FIG. 4, the anode bus 1 is formed in a comb-like shape, and the resistor 2 is formed by terminating the comb-shaped branch anode bus 14 and the anode 3 provided substantially at the center thereof. You may. When the resistor 13 is printed in the longitudinal direction in a strip shape by the thick film printing, it is easy to uniformly form the resistor 13 except for the beginning and end of the printing. Forming the comb-shaped branched anode bus 14 and the anode 3 terminating the resistor wider than the resistor 13 has the advantage that the dimensional accuracy of electrode formation does not matter much.

The position accuracy of the anode 3 with respect to the branch anode bus 14 in the embodiment shown in FIG. 4 will be described with reference to FIG. As shown in FIG. 10 (a), the anode 3 and the branch anode bus
FIG. 10 (b) shows the change in the resistance value due to the shift g when the distance from the shift 14 is 1 and the shift is g. According to this, the deviation is 0.1 (equivalent to 10%), and the change in the resistance value is 1% or less.

Similarly to the embodiment shown in FIG. 3, in the embodiment shown in FIG. 4, the anode bus 1 may be formed below the resistor 13. Further, as shown in FIG. 5, the branch anode bus 15 may be formed in a ladder shape to separate adjacent anodes 3. In this case, the positional accuracy of the anode 3, the anode bus 1, and the branch anode bus 15 is 10% as described in FIG.
The change of the resistance value is guaranteed to be less than 1%. Further, the distance between the adjacent anodes 3 can be made shorter than in the embodiment of FIG. Also in this case, the anode bus 1 may be formed below the resistor 13.

Although the embodiments described above all show examples in which a resistor is formed on the anode side of a discharge cell, these may be formed on the cathode side. In this case, a cathode can be further formed on the terminal electrode of the resistor. This can be applied to the anode, and a layer of, for example, nickel having high resistance to mercury, which is generally used to extend the life of the gas discharge display panel, may be laminated.

Further, the present invention is applied not only to the gas discharge display panel shown in FIG. 1 but also to a panel in which a luminescent color of gas discharge is directly extracted to the outside using a Ne-based gas or a panel without an auxiliary anode. it can.

Further, the present invention is not limited to the panel having the structure shown in FIG. 1. For example, the cathode and the anode may be offset, that is, the cathode and the anode do not face each other.

Although the method of manufacturing the resistor, the bus terminating the resistor, and the electrode has been described assuming a method by thick film printing, these manufacturing methods include, for example, vapor deposition, photolithography, chemical etching, and the like. Patterning by lift-off or the like may be used.

Examples of the resistance material RuO _2, nichrome alloy, tin _{oxide, Ta 2 N, Cr-SiO} , ITO, or carbon is mentioned, RuO ₂
At present, it is best to use the thick film paste described above.

As the electrode material for terminating the resistor, Au, P
d, Ag, Al, Ni, Cu, etc. or their alloys are used.
Au was the best in thick film printing.

As the charged gas, a mixture of rare gases such as He-Xe and Ne-Xe is used. As shown in Japanese Patent Application No. 3-202135, a partial pressure ratio of He and Xe is used as the charged gas. Occupies more than 95% of the total charged gas, and the total pressure P of Xe gas
When the partial pressure ratio with respect to (torr) is x, 0.01 ≦ x ≦ 0.
5. If P ≦ 600 and xP ⁵ ≧ 1.4 × 10 ¹¹ are satisfied, the life can be extended. Further, the effective area of the cathode of the cell is expressed as S
[Mm ² ], the discharge sustaining current is I [μA], and 0.01 ≦ x ≦
0.5, P ≦ 600 and xP ⁵ (S / I) ² ≧ 6.3 × 10 ⁴
Long life can be obtained.

As the cathode material, Al, Ni or the like can be easily used. In the case of Ni, the life is shorter than that of Al, but mercury
By adding Hg, the life can be extended to about 100 times that before the addition, so the life is longer than that of Al.

Other materials such as boride such as BaAl ₄ , LaB ₆ and BaB ₆ , Ba (N ₃ ) ₂ , alkali metal, Y ₂ O ₃ , ZnO, RuO ₂ ,
Cr, Co, graphite, Ca _0.2 La _0.8 CrO ₃ , Mg, BaLa ₂ O ₄ ,
BaAl ₂ O ₄ and LaCrO ₃ have almost the same effect.
The attachment method is applied by a method such as printing plasma spraying, vapor deposition, or sputtering.

The phosphor is usually Y for red._TwoO_Three： Eu, YV
O_Three: Eu, YP_0.65V_0.35O_Four: Eu, YBO_Three： Eu, (YGa) BO_Three:EU,
Zn for green_TwoSiO_Four： Mn, BaMg_TwoAl₁₄O_{twenty four}： Eu.Mn, BaAl
₁₂O₁₉： Mn, Y for blue_TwoSiO_Four: Ce, YP_0.85V_0.15O_Four:EU,
 BaMg_TwoAl₁₄O_{twenty four}： Eu, BaMgAl ₁₄O_{twenty three}: Eu is used.
Adhesion printing, photo-etching method, adhesive method, spray method
Etc.

The filter for increasing the contrast is as follows:
It can be incorporated into panels as described in detail in the Television Technical Report ED-993 (November 13, 1986).

There are two types of driving of a panel with a resistor, that is, a DC memory mode and a pulse memory mode. The present invention can be used in both modes.

[0039]

According to the prior art, it was very difficult in manufacturing to suppress the variation of the resistance value provided for each cell of the gas discharge display panel, but the present invention has made it easier.

In particular, the resistor for forming the resistor has a very simple shape of a band parallel to the anode bus, and a uniform resistor having no variation can be easily manufactured without requiring high accuracy. Further, the relative accuracy of the position between the electrode bus bar terminating the resistor and the electrode may be 10% of the design dimension, which makes it extremely easy to manufacture. Furthermore, when the invention of the present application is used in combination with the invention described in Japanese Patent Application No. 3-202135, "Direct Current Discharge Panel and Display Device" by the present applicant, a panel having a long life, high efficiency, and little variation in images is obtained. However, in the case of a DC type color discharge display panel, it is possible to realize a panel having a remarkable effect in which a high-brightness panel using a memory type driving system, which has not been practically used, becomes practical for the first time.

[Brief description of the drawings]

FIG. 1 shows the configuration of an embodiment according to the display panel of the present invention, wherein (a) is a plan view of a portion of the gas discharge display panel,
(b) is a cross-sectional view of the cut surface C ₁ -C ₂ .

FIG. 2 shows an outline of a conventional structure of a gas discharge display panel,
(a) is a plan view of a part of the display panel, and (b) is a cut surface.
Sectional view of the A ₁ -A _2.

FIG. 3 shows another embodiment of the resistor arrangement according to the present invention,
(a) is a plan view for explaining this, and (b) is a cut plane D ₁ −
Sectional view of D _2.

4A and 4B show another embodiment of the configuration according to the present invention, wherein FIG. 4A is a plan view for explaining the embodiment, and FIG. 4B is a cross-sectional view taken along a cut surface E ₁ -E ₂ .

FIG. 5 shows still another embodiment of the configuration according to the present invention;
(a) is a plan view for explaining this, and (b) is a cut surface F ₁ −
Sectional view of the F _2.

FIG. 6 shows the relationship between the distance between adjacent anodes along the anode bus of the present invention and the resistance value, (a) and (b) show the position and potential relationship between the anode bus and the anode, and (c) shows the numerical values The calculation results are shown.

FIG. 7 shows a change in resistance value when the anode of the present invention is displaced vertically toward the anode bus, (a) shows a positional relationship between the anode bus and the anode, and (b) shows a numerical calculation result thereof. .

FIG. 8 shows a change in resistance value of the anode of the present invention with respect to a change in a direction parallel to the anode bus, (a) shows a positional relationship between the anode bus and the anode, and (b) shows a numerical calculation result thereof.

FIG. 9 shows a change in resistance value of the anode of the present invention with respect to a change in a direction perpendicular to the anode bus, (a) shows a positional relationship between the anode bus and the anode, and (b) shows a numerical calculation result thereof.

FIG. 10 shows a change in resistance value in the positional accuracy of the anode of the present invention with respect to the branch anode bus, (a) shows a positional relationship between the branch anode bus and the anode, and (b) shows a numerical calculation result thereof.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 anode bus 2 resistor 3 anode 4 cathode 5 auxiliary anode 6 bank 7 discharge cell 8 front glass substrate 9 rear glass substrate 10 white glass back 11 slit 12 phosphor 13 resistor 14 and 15 branch anode bus

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-122549 (JP, A) JP-A-59-14237 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 17/04-17/10 H01J 17/49 H01J 11/00-11/02 G09F 9/313

Claims (4)

(57) [Claims] 1. A front plate and a back plate, on each of which a plurality of groups of striped cathodes arranged in parallel and a plurality of groups of striped anode buses arranged in parallel are arranged. A gas discharge display panel comprising: a plurality of discharge cells formed in a matrix by spacers or partition walls; and a resistor for limiting a discharge current of each discharge cell disposed in each discharge cell. One anode bus and approximately at the center between the two anode buses, terminated by an anode for forming a pair with one of the cathodes and applying a voltage necessary for causing the discharge cells to discharge. The gas discharge display panel is formed, wherein the resistor forming the resistor is formed over a plurality of discharge cells extending in the direction of the anode bus sharing the two anode buses. Le. 2. The display panel according to claim 1, wherein the branch anode bus is formed so as to protrude in a comb shape in a direction perpendicular to the anode bus so as to form a pair corresponding to each discharge cell. Are terminated by a pair of protruding branch anode buses and an anode provided substantially at the center thereof, and the resistor is formed as a strip-shaped resistor having a width smaller than a distance between two adjacent anode buses. A gas discharge display panel formed so as to extend in a generatrix direction. 3. The display panel according to claim 1, wherein the branch anode bus is formed between the adjacent two anode buses so as to form a pair corresponding to each discharge cell, and the resistance element is connected to the branch anode bus. Is terminated by the pair of cross-linked branched anode buses, the two anode buses, and the anode. 4. The display panel according to claim 1, wherein the anode bus, the branch anode bus, the anode and the cathode correspond to a cathode bus, a branch cathode bus, a cathode and an anode, respectively. A gas discharge display panel wherein an anode and a cathode are disposed on a front plate and a rear plate, respectively.