JPH04233131A - Plasma display panel - Google Patents

Abstract

PURPOSE:To provide a plasma display panel which can improve the yield rate of manufacture by facilitating the alignment of each electrode with each partition wall in relation to the matrix display type plasma display panel. CONSTITUTION:A plasma display panel 1 wherein plural partition walls 29, 29C parallel with each other are formed on one 21 of paired substrates 11, 21 facing each other via an electric discharging gap 39 and each of beltlike electrodes 22 is arranged in proximity to each of the partition walls 29, 29C between the respective partition walls 29, 29C comprises each of the partition walls 29 and each of the electrodes 22 arranged in linear symmetry via the partition wall 29C at the central part of the substrate 21, used as a symmetry axis.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix display type plasma display panel (PDP).

PDPs have excellent display visibility among flat display devices, and are increasingly being used as display means for office automation equipment and various display devices. Along with this, there is a desire for lower prices of PDPs.

0003

[Prior Art] Conventionally, in matrix display type PDPs that display characters and figures by combinations of dots (pixels) that emit light, a surface that can display various colors by providing a phosphor of a predetermined emitting color has been developed. Discharge type P
DP is known.

FIG. 3 is a diagram showing the structure of a conventional PDP 2. FIG. 3(a) is a cross-sectional view of the PDP2, and FIG. 3(b)
is a plan view of PDP2.

In these figures, the PDP 2 includes a glass substrate 11 on the display side, a pair of discharge sustaining electrodes 12, and a dielectric layer 1.
7. It is composed of a lattice-shaped partition 19, a glass substrate 21 on the back side, a plurality of parallel partitions 29, an address electrode 22, a phosphor 28, etc., and the upper surface of the glass substrate 11 in FIG. 3(a) is the display surface. becomes.

The discharge sustaining electrode pair 12 consists of a pair of main discharge electrodes 13 and 14 made of a transparent conductive material, and extends laterally on the inner surface of the glass substrate 11. Further, the address electrode 22 is connected to a partition wall 29 on the inner surface of the glass substrate 21.
in the direction perpendicular to the discharge sustaining electrode pair 12 (
extends vertically).

The internal discharge space 30 is filled with a mixed gas of, for example, neon and xenon, and this discharge space 30 is divided into unit light emitting areas EU by partition walls 19 and 29, as shown in FIG. 3(b). has been done.

One phosphor 28 is provided for each unit light emitting area EU. The formation area of the phosphor 28 is
In order to increase display brightness, it is necessary to make the unit light emitting area EU as large as possible. Therefore, the above-mentioned address electrode 22 passes through the end of the unit light emitting area EU.
That is, it is provided close to and parallel to the partition wall 29.

[0009] In the figure, the partition wall 29 and the address electrode 22
, and phosphor 28 are sequentially provided in contact with each other, but in reality, a margin for positioning is set when these are sequentially formed, so there is a slight gap between them. Further, the surface of the dielectric layer 17 is covered with a protective film (not shown).

In the PDP 2 configured as described above, a selective discharge (not shown) is provided at the intersection of the main discharge electrode 13 and the address electrode 22, which face each other with the discharge space 30 in between, for selecting the light emission of the unit light emitting area EU. A cell is defined. In addition, a main discharge cell for causing the phosphor 28 to emit light is defined in the mutually opposing portions of the main discharge electrodes 13 and 14 in the vicinity of the selected discharge cell.

For displaying, for example, first, a voltage exceeding the discharge starting voltage is applied between the main discharge electrode 13 and the main discharge electrode 14 to start a line-by-line discharge. Next, for each line, the unit light emitting area EU unnecessary for display is
A discharge erase pulse is applied to the address electrode 22 corresponding to the address electrode 22 to erase the wall charge of the dielectric layer 17 and stop the discharge. Thereafter, a discharge sustaining voltage is applied to the discharge sustaining electrode pair 12, and the main discharge cells corresponding to the display dots continue to discharge. As a result, the phosphor 28 facing the main discharge cell during discharge is excited by the ultraviolet rays generated by the discharge and emits light.

0012

[Problems to be Solved by the Invention] Generally, when manufacturing a PDP, first, predetermined members such as electrodes are separately provided on each of the display side substrate and the back side substrate, and then both substrates are placed facing each other and The PDP is completed by sealing it with sealing glass and filling the inside with discharge gas.

In manufacturing the conventional PDP 2, for the glass substrate 21 on the rear side, address electrodes 22 are first formed on the glass substrate 21 by, for example, a thick film method. Next, low melting point glass is coated and fired by screen printing in accordance with the arrangement of the address electrodes 22, thereby forming the partition walls 29.
form. Finally, a phosphor 28 is provided by screen printing or photolithography.

Now, in the conventional PDP2, as shown in FIG.
As clearly shown in Figure a), the arrangement relationship between the address electrodes 22 and the partition walls 29 was such that all the address electrodes 22 were arranged along one side of the partition walls 29 (the right side in the figure). That is, on the entire surface of the glass substrate 21, the address electrode 22 was provided so as to pass through the left end of the unit light emitting area EU.

[0015] For this reason, in the conventional PDP 2, high precision is required in the manufacturing stage, especially in the alignment of the address electrodes 22 and the partition walls 29, which lowers the manufacturing yield and increases the cost of the PDP 2. There was a problem that there was a risk.

That is, during manufacturing, if the screen mask (partition mask) used for forming the partition 29 is aligned with one end of the glass substrate 21 as a reference, for example,
At the other end of the glass substrate 21, the difference (pitch difference) between the pitch of the address electrodes 22 already formed on the glass substrate 21 and the pitch of the partition mask pattern is the address electrode 22.
As a result, a large positional shift occurs between the address electrode 22 and the partition wall 29.

Therefore, the arrangement of the barrier rib masks is finely adjusted in order to equalize the positional displacement in each part of the glass substrate 21. However, since the positional displacement is large as described above, all the barrier ribs 29 are connected to the address electrodes 22. It is difficult to arrange partition masks so that they do not overlap.

[0018] Therefore, in order to minimize the positional deviation, it is necessary to fabricate a highly accurate barrier rib mask. Further, the address electrodes 22 must also be arranged with high precision.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a plasma display panel in which the manufacturing yield can be improved by facilitating the alignment of electrodes and partition walls.

[0020]

[Means for solving the problems] A PDP according to the present invention includes:
In order to solve the above-mentioned problem, as shown in FIG. Between each partition wall 29, 29C, the partition wall 29,
29C, the plasma display panel 1 has strip-shaped electrodes 22 arranged one by one close to the substrate 21.
The partition walls 29 and the electrodes 22 are arranged symmetrically with respect to the partition wall 29C at the center of the partition wall 29C as an axis of symmetry.

[0021]

[Operation] When aligning the electrode 22 and the partition wall 29,
If the center of the substrate 21 in the arrangement direction of the electrodes 22 is taken as the reference position, even if there is a slight pitch difference between the pitch of the electrodes 22 and the pitch of the partition walls 29, the position of each electrode 22 and each partition wall 29 will be The maximum value of the deviation is a value obtained by multiplying the pitch difference by one half of the number of electrodes 22 and partition walls 29.

[0022]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a PDP 1 according to the present invention, and FIG. 2 is a plan view schematically showing the structure of the main part of the PDP 1 of FIG.

In FIGS. 1 and 2, components having the same functions as those in FIG. 3 are denoted by the same reference numerals, and explanations of these components will be omitted or simplified.

[0025] The PDP 1 includes a glass substrate 11 on the display surface side;
Discharge sustaining electrode pair 12, dielectric layer 17, lattice-shaped partition 19
, a glass substrate 21 on the back side, and a plurality of partition walls 2 parallel to each other.
9, 29C, an address electrode 22, a phosphor 28, etc., and performs matrix display under the same drive control as the conventional PDP 2 (see FIG. 3).

In FIG. 1, the partition walls 29 and 29C, the address electrodes 22, and the phosphor 28 are provided in contact with each other in this order, but in reality, a margin for positioning is set when these are sequentially formed. Therefore, there is a slight gap between them.

The functions and structures of the partition walls 29 and 29C are the same, but in contrast to the partition walls 29 and 29C provided at the center (not necessarily at the exact center) in the arrangement direction of the address electrodes 22 on the glass substrate 21, the partition walls 29 and 29C are The letter "C" is added to the code to distinguish it.

A feature of the PDP 1 is that, as clearly shown in FIG. 2, the partition walls 29, the address electrodes 22, and the phosphors 28 are arranged in a line with the center line L of the partition wall 29C, that is, the glass substrate 21, as the axis of symmetry. These points are arranged symmetrically.

That is, in FIGS. 1 and 2, the partition wall 29
On the left side of C, an address electrode 22 and a phosphor 28 are sequentially provided on the left side of each partition wall 29, and on the right side of the partition wall 29C,
An address electrode 22 and a phosphor 28 are provided in this order on the right side of each partition 29. And regarding the bulkhead 29C,
Address electrodes 22 and phosphors 28 are provided in this order on both sides.

By arranging the partition walls 29, 29C, address electrodes 22, and phosphors 28 in this manner, the PDP
1, the partition walls 29, 29C, address electrode 2
2 and the phosphor 28 can be easily aligned with each other.

That is, in manufacturing, first, the address electrode 22 is provided on the glass substrate 21 with the center line L as a reference, and then the partition walls 29 and 29C are formed in accordance with the arrangement of the address electrode 22. At this time, if the reference for alignment of the barrier rib mask is the center line L, even if there is a difference (pitch difference) between the pattern pitch of the barrier rib mask and the arrangement pitch of the address electrodes 22, the barrier ribs 29 and The maximum value of the positional deviation with respect to the address electrodes 22, that is, the size of the positional deviation at both ends of the glass substrate 21 where the pitch difference is accumulated, is approximately equal to half the number of address electrodes 22 multiplied by the pitch difference. This is approximately half the value obtained by multiplying the total number of address electrodes 22 by the pitch difference as in the conventional case.

Therefore, even if a slight deviation occurs in the alignment of the barrier rib mask, the barrier ribs 29 and
29C does not overlap. In other words, the tolerance for positioning the barrier rib mask increases.

Similarly, the phosphor 28 can be easily aligned with the address electrode 22.

According to the embodiment described above, the partition walls 29, 29C
, the address electrodes 22, and the phosphor 28 are small, and uniform discharge characteristics can be obtained over the entire display surface, allowing high-quality display.

In the embodiment described above, the address electrode 2
By providing the phosphor 28 adjacent to 2,
Although the PDP 1 that can display various colors has been exemplified, the present invention can also be applied to a PDP that does not have a phosphor 28.

[0036]

According to the present invention, the electrodes and the partition walls can be easily aligned, and the yield during manufacturing can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a PDP according to the present invention.

FIG. 2 is a plan view showing main parts of the PDP shown in FIG. 1;

FIG. 3 is a diagram showing the structure of a conventional PDP.

[Explanation of symbols]

1 PDP (plasma display panel) 11,2
1 Glass substrate (substrate) 22 Address electrode (electrode) 29, 29C Partition wall 30 Discharge gap

Claims (1)

[Claims] 1. A plurality of partition walls (29) (29C) parallel to each other are provided on one substrate (21) of a pair of substrates (11) (21) facing each other with a discharge gap (30) interposed therebetween; Between each partition wall (29) (29C), the partition wall (29) (29C)
A plasma display panel (1) in which strip-shaped electrodes (22) are arranged one by one close to a substrate (29C), with the partition wall (29C) in the center of the substrate (21) as an axis of symmetry. A plasma display panel characterized in that a partition wall (29) and each of the electrodes (22) are arranged line-symmetrically.