JPH11317172A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display having high discharge efficiency. SOLUTION: This plasma display panel is equipped with a first substrate S1 and a second substrate facing each other with a rib 4 intervened between to form a discharge space, and an X electrode 7 and a Y electrode 8 extended in parallel with each other in the first substrate S1. The first substrate S1 is provided with a recessed part 100 between the X electrode 7 and Y electrode 8 on the surface of the second substrate. A protective film to increase a secondary-emission coefficient is provided on the surface of the recessed part 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a plasma display panel (hereinafter, referred to as "PDP") which is easy to manufacture and has high luminance and high efficiency.

[0002]

2. Description of the Related Art FIG. 14 is a perspective view showing a part of the structure of a conventional AC-driven PDP. The structure of this PDP relates to the most widely adopted reflective surface discharge AC plasma display panel at present, and is described, for example, in FIG. 2.2 (page 20) of “Latest Technology of Plasma Display” (Shigeo Mikoshiba, ED Research). ).

In FIG. 14, 1 is a front substrate (substrate body), 2 is a rear substrate, 3 is a discharge space formed by arranging the front substrate 1 and the rear substrate 2 to face each other, 4 is a front substrate and a rear substrate. 2, the height of the discharge space 3 is defined, and ribs provided on the main surface on the side of the rear substrate 2 at a predetermined pixel pitch are provided in parallel with each other. 2 is a writing electrode formed on the surface, 6 is a phosphor applied in a region defined by the rib 4, and 7 and 8 are front substrates 1 in a direction perpendicular to the extending direction of the writing electrode 5 and the rib 4. X and Y electrodes formed on the surface and parallel to each other, 9 and 10
Is a transparent electrode and a metal electrode constituting each of the X electrode 7 and the Y electrode 8; 11 is a main surface of the front substrate 1 on the rear substrate 2 side;
A dielectric layer covering the electrode 7 and the Y electrode 8, and 12 is an MgO film provided on the dielectric layer 11. Also, R, G, B
Indicates that the phosphors 6 correspond to red, green, and blue, respectively, and three discharge cells related to R, G, and B constitute one pixel.

The front substrate 1, the X electrode 7, the Y electrode 8, the dielectric layer 11, and the MgO film 12 constitute a first substrate S1, and the rear substrate 2, the ribs 4, the write electrodes 5, and the phosphors 6 constitute a second substrate S1. Substrate S
Constituting No. 2. PDP includes a front substrate S1 and a rear substrate S2.
Is a structure in which

FIG. 15A is a plan view of one pixel of the PDP shown in FIG.
4A shows a first substrate S1 of DP, and FIG. 4B shows a cutting line XV of FIG.
FIG. 5 shows a cross-sectional view of the first substrate S1 along b-XVb. FIG.
Correspond to FIG.

Next, driving of the PDP will be described. By applying a voltage between the writing electrode 5 and the X electrode 7 to perform discharge, charges are accumulated in a discharge cell to emit light. In this write discharge, voltages are applied in a predetermined order so that charges are accumulated for each line, and all the Y electrodes 8 may be set to, for example, the same potential. Next, by applying an AC voltage between the X electrode 7 and the Y electrode 8, a discharge is generated in the discharge cell in which the charge is accumulated in the write discharge. In this sustain discharge, the AC voltage is applied to all X electrodes 7 and Y electrodes 8
At the same time. This sustain discharge occurs on the surface of the dielectric layer 11, that is, on the surface of the dielectric layer 11. Ultraviolet light generated by the sustain discharge impinges on the phosphor 6 and is converted into red, green, or blue visible light. In this way, only the discharge cells that want to emit light can emit light.

The PDP is a light-emitting panel, and has advantages such as a wide viewing angle as compared with a non-light-emitting panel such as a liquid crystal display.

In addition, various measures have been taken to improve the luminous efficiency and the like of the discharge cells. For example, each of the X electrode 7 and the Y electrode 8 includes a transparent electrode 9 and a metal electrode 10 for reducing the electric resistance of the electrode itself.
The brightness is increased by increasing the width of the transparent electrode 9 to spread the discharge. In addition, since the metal electrode 10 does not allow light to pass through itself, it prevents the visible light generated in the discharge space 3 from passing through the front substrate 1.
Among them, the luminous efficiency is increased by disposing the metal electrode 10 as far as possible from the center of the discharge cell. Further, by providing the MgO film 12 on the entire surface of the dielectric layer 11, the minimum voltage required for generating a discharge is reduced.

[0009]

However, the conventional PDP has various devices for improving luminous efficiency and the like, but has a problem that luminous efficiency is still low. For example, regarding luminous efficiency,
PDP is 1 [lm / W] or less and CRT is 2-3 [lm / W].
W], a low-pressure mercury lamp using discharge like PDP, so-called fluorescent lamp is 60 [lm / W] (Reference: Discharge Handbook, edited by the Institute of Electrical Engineers of Japan), and an Xe lamp using discharge is also 10 [white]. lm / W] (Reference: T. Urak
abe, etc., "A Flat Fluorescent Lamp with Xe Dielectr
ic Barrier Discharge "Journal of Light & Visual Env
iroment, Vol.20 No.2, p.20 (1996)).

The present invention has been made to solve this problem, and has as its object to obtain a plasma display panel having high luminous efficiency.

[0011]

Means for Solving the Problems According to a first aspect of the present invention, there is provided a first and a second substrate which are opposed to each other with a rib therebetween to form a discharge space; First and second electrodes extending in parallel with each other, wherein the first substrate presents a first recess between the first and second electrodes on a surface on the second substrate side. It is characterized by.

According to a second aspect of the present invention, the bottom of the first recess is located deeper inside the first substrate than the first and second electrodes.

In the means for solving problems according to claim 3 of the present invention, each of the first and second electrodes comprises only a metal electrode.

According to another aspect of the present invention, the bottom of the first recess is located deeper inside the first substrate than the first and second electrodes, and Each consist of only a metal electrode, and the first and second
The metal electrodes of the electrodes face each other via the first recess.

According to a fifth aspect of the present invention, each of the first and second electrodes comprises a metal electrode and a transparent electrode which are separated from each other and extend in parallel, and the first substrate is Also, a second recess is provided between the metal electrode and the transparent electrode.

According to a sixth aspect of the present invention, the bottom of the first recess is located deeper inside the first substrate than the first and second electrodes, and the first and second electrodes are located at the bottom of the first substrate. Transparent electrodes face each other via the first recess.

According to a seventh aspect of the present invention, the first substrate is formed on a substrate body of the first substrate and on the second substrate side of the substrate body, and the first and second substrates are formed. A dielectric layer covering the electrodes, wherein the substrate body is flat.

[0018] The problem solving means according to claim 8 of the present invention comprises:
The semiconductor device further includes a protective film for covering the surface of the first dent to protect the surface of the first substrate from spattering due to electric discharge and increasing the secondary electron emission coefficient of the surface of the first dent.

According to a ninth aspect of the present invention, there is provided a device for solving a problem,
The light emitting device further includes a phosphor provided at a bottom of the first recess.

According to a tenth aspect of the present invention, there is further provided a frame formed at an edge of the opening of the first recess and protruding from a surface of the first substrate.

The eleventh aspect of the present invention is directed to a first and a second substrates which form a discharge space in opposition to each other with a rib interposed therebetween, and extend inside the first substrate in parallel with each other. A plurality of discharge electrode pairs, the discharge electrode pairs comprising first and second electrodes extending in parallel with each other, and the first substrate is adjacent on the surface on the second substrate side It is characterized by exhibiting a depression between the discharge electrode pairs.

According to a twelfth aspect of the present invention, there is provided a first and a second substrate, which are opposed to each other with a rib therebetween to form a discharge space, and extend parallel to each other inside the first substrate. A plurality of discharge electrode pairs, the discharge electrode pairs comprising first and second electrodes extending in parallel with each other, and the first substrate is adjacent on the surface on the second substrate side A projection is provided between the discharge electrode pairs.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1A and 1B show a PDP according to the first embodiment and correspond to FIGS. 15A and 15B. FIG. 1A is a plan view of one pixel, and FIG. 1B is a cutting line Ib-I.
FIG. 2B shows a cross-sectional view of the first substrate S1 in FIG.

In FIG. 1, reference numeral 100 denotes a depression (first depression) provided by not covering the front substrate 1 with the dielectric layer 11 between the X electrode 7 and the Y electrode 8, and reference numeral 60 denotes a bottom surface of the depression 100. The phosphor provided above is the same as the conventional phosphor, and the description is omitted.

As the second substrate S2, a known substrate is applied, for example, as shown in FIG.

The recess 100 is provided for each discharge cell, and has a size that can be accommodated between the adjacent ribs 4, and is a hole having a dielectric layer 11 surrounding the recess 100 in each discharge cell. The front substrate 1 is dug down using, for example, sand blasting so as to deepen the depression 100, and the bottom surface of the depression 100 is inside the front substrate 1. Dent 100
Are covered with the MgO film 12. The discharge space 3 is connected to the space inside the recess 100.

By providing the recess 100, the X electrode 7 and the Y electrode 8 become closer to a so-called opposing electrode which faces through the recess 100.

The phosphor 60 facilitates transmission of visible light from the front substrate 1 to the opposite side from the rear substrate 2. For example, the phosphor 60 may be thinned so that visible light can be easily transmitted. However, since the thinner the phosphor 60, the lower the absorptivity of ultraviolet rays, it is necessary to reduce the thickness of the phosphor 60 in consideration of this absorptivity.

Next, let us consider a case where the PDP of the first embodiment is driven in the same manner as the conventional case. Since the discharge generally occurs where the electrodes are closest to each other, the sustain discharge starts in the recess 100. In addition, since the X electrode 7 and the Y electrode 8 have a structure close to the counter electrode, the discharge is not
Occurs primarily along opposing sides within the recess 100, rather than along inner walls within the zero. That is, in the first embodiment, a discharge occurs regardless of the creeping discharge. Since the creeping discharge receives interference from the first substrate S1 and the ribs 4, the electrons lose energy. In the first embodiment, since the discharge is generated irrespective of the creeping discharge, the energy of the electrons involved in the discharge is less likely to be deprived and the generation efficiency of the ultraviolet ray is higher than in the conventional case.

The electric discharge is caused in the region 20 shown in FIG.
As shown in FIG. 15, since it occurs in the dent 100 and spreads out from the dent 100 toward the rear substrate 2 as shown in FIG.
As compared with the region 200 shown in FIG. Therefore, in the first embodiment, as compared with the related art,
Since the electrons related to the discharge are less susceptible to interference by the ribs 4, the energy of the electrons related to the discharge is less likely to be deprived, and the generation efficiency of the ultraviolet rays is increased.

Further, according to Chapter 2.5 of "Latest Technology of Plasma Displays" (Shigeo Miko, ED Research), generally, from the cathode to the anode, the area of the cathode descending portion, the negative glow, and the positive column Is formed, and the X electrode 7 is formed.
A region called a sheath is formed at the boundary between the Y electrode 8 and the rib 4. Negative glows and positive columns generate ultraviolet light.
The size of the cathode descending portion and the sheath is determined by the composition of the discharge gas, the cathode material, and the like, and a portion other than the cathode descending portion and the sheath in the discharge space 3 is occupied by the positive column and the negative glow. Therefore, as the discharge space 3 becomes narrower, the proportion occupied by the cathode descending portion and the sheath increases, and the proportion occupied by the positive column and the negative glow decreases. However, in the first embodiment, the provision of the recess 100 increases the discharge space 3 as compared with the related art, so that the ratio of the positive column and the negative glow increases, and the generation efficiency of ultraviolet rays increases.

According to the first embodiment, the above recess 100
, The efficiency of ultraviolet light generation increases,
Luminous efficiency is higher than in the past.

In the prior art, of the ultraviolet rays generated by the discharge, the ultraviolet rays directed to the front substrate 1 do not contribute to light emission because they do not hit the phosphor 6. However, in the first embodiment, the ultraviolet rays directed to the front substrate 1 hit the phosphor 60,
Luminous efficiency is higher than before.

Also, the deeper the recess 100, the more
The discharge can be made less susceptible to interference of the bottom surface of the recess 100.

Further, since the discharge is generated inside the recess 100, the discharge is generated on the first substrate S1 and the phosphor 6
Since it does not reach (FIG. 14), the phosphor 6 does not receive interference. Therefore, even if the height of the rib 4 is shortened, the phosphor 6
The luminous efficiency does not decrease due to the interference. In addition, by doing so, there is an advantage that writing discharge can easily occur.

Embodiment 2 FIG. 2 shows the P
DP is shown, (a) is a plan view of one pixel,
(B) is a cross-sectional view of the first substrate S1 taken along section line IIb-IIb.

In the second embodiment, the X electrode 7 and the Y electrode 8
There is a feature. The other parts are the same as those in the first embodiment, and a description thereof will be omitted.

Since the discharge occurs in the recess 100, the transparent electrode 9 does not need to serve to spread the discharge. Therefore, in the second embodiment, the transparent electrode 9 is omitted,
The X electrode 7 and the Y electrode 8 are constituted only by the metal electrodes 10.
Omission of the transparent electrode 9 facilitates PDP production.

Further, since the transparent electrode 9 is omitted, the depression 1
00 can be widened, and the discharge space 3 can be widened.

Embodiment 3 FIG. 3 shows P
DP is shown, (a) is a plan view of one pixel,
(B) is a cross-sectional view of the first substrate S1 taken along a cutting line IIIb-IIIb.

The third embodiment is characterized by the metal electrode 10. The other parts are the same as those in the second embodiment, and the description is omitted.

The metal electrodes 10 of the X electrode 7 and the Y electrode 8 according to the third embodiment are embedded in the front substrate 1 in a state of facing each other via the recess 100. The metal electrode 10 is buried so that the long side of the cross section is along the normal direction D2 of the front substrate 1 and the short side is along the surface direction D1 of the front substrate 1. Thus, compared to the second embodiment, the discharge is less likely to spread outside the recess 100, and the interference of the ribs 4 is reduced. Moreover, compared to the second embodiment, the dimensions of the X electrode 7 and the Y electrode 8 are shorter when viewed from the normal direction D2.
The visible light passes through the front substrate 1 without being disturbed by the X electrode 7 and the Y electrode. Therefore, the luminous efficiency is high.

Further, if the dent 100 is dug deeply,
Discharge can be generated at a position deep from the opening of the recess 100. This discharge spreads through the recess 100 to the discharge space 3, but does not easily spread in the discharge space 3 toward the surface of the front substrate 1. Therefore, the luminous efficiency is high because the surface discharge is small.

The short sides 7a of the X electrode 7 and the Y electrode 8
When the bottom surface (the surface of the phosphor 60) of the recess 100 is located between the surface 8b and the surface 1b, a discharge is generated on the surface of the phosphor 60 by creeping discharge. Therefore, the bottom of the recess 100 is located deeper inside the first substrate 1 than the X electrode 7 and the Y electrode 8. That is, the short sides 7a, 8a of the X electrode 7 and the Y electrode 8 and the surface 1a
It is desirable that the bottom surface of the recess 100 (the surface of the phosphor 60) be located between them. As a result, no discharge is generated by creeping discharge on the surface of the phosphor 60, so that the energy of electrons involved in the discharge can be prevented from being deprived.

In the structure shown in FIG. 3, a recess 100 is formed in the surface of the front substrate 1 by, for example, sandblasting, and a groove for embedding the X electrode 7 and the Y electrode 8 is dug.
This can be realized by embedding the X electrode 7 and the Y electrode 8 in the groove and then forming the dielectric layer 11, the MgO film 12, and the phosphor 60.

Embodiment 4 FIG. The conventional transparent electrode 10 plays a role of spreading the discharge. When the discharge spreads to the metal electrode 10, visible light generated based on the discharge near the metal electrode 10 is blocked by the metal electrode 10 and does not pass through the front substrate 1. Therefore, the luminous efficiency decreases.

FIG. 4 shows a PDP according to a fourth embodiment in which this point is improved, wherein (a) is a plan view of one pixel,
(B) is a cross-sectional view of the first substrate S1 taken along a cutting line IVb-IVb.

The fourth embodiment is characterized by the X electrode 7, the Y electrode 8, and the recess 100a (second recess). The other parts are the same as those in the first embodiment, and a description thereof will be omitted.

The X electrode 7 and the Y electrode 8 of the fourth embodiment
For example, the application of the content of Patent Application No. 09125914 is made up of a transparent electrode 9, a metal electrode 10, and a short-circuit electrode 91. The transparent electrode 9 and the metal electrode 10 extend parallel to each other at a predetermined interval and are connected to each other by a short-circuit electrode 91 arranged at a position where the rib 4 overlaps. The recess 100 a is provided by not covering the front substrate 1 with the dielectric layer 11 in a region surrounded by the transparent electrode 9, the metal electrode 10, and the short-circuit electrode 91. The front substrate 1 is dug down so as to deepen the recess 100a.

In the shapes of the X electrode 7 and the Y electrode 8, the transparent electrode 9 and the metal electrode 10 are separated from each other, and a recess 100a is provided between the transparent electrode 9 and the metal electrode 10. This is equivalent to removing the surface between the transparent electrode 9 and the metal electrode 10 due to the creeping discharge. Therefore, creeping discharge does not occur in the portion where the recess 100a is provided, so that the spread of the discharge can be suppressed as compared with the case where the recess 100a is not provided. In addition, the discharge space 3 is widened by the provision of the recess 100a.

Embodiment 5 FIG. FIG.
DP is shown, (a) is a plan view of one pixel,
(B) is a cross-sectional view of the first substrate S1 taken along a cutting line Vb-Vb.

The fifth embodiment is characterized by the transparent electrode 9. The other parts are the same as those of the fourth embodiment, and the description is omitted.

The transparent electrode 9 of each of the X electrode 7 and the Y electrode 8 of the fifth embodiment is obtained by applying the concept of the third embodiment, and is embedded in the front substrate 1 while facing each other through the recess 100. . The transparent electrode 9 is buried so that the long side of the cross section is along the normal direction D2 of the front substrate 1 and the short side is along the surface direction D1 of the front substrate 1. Furthermore, if the recess 100 is dug deep, a discharge can be generated at a position deep from the opening of the recess 100. This discharge spreads through the recess 100 to the discharge space 3, but does not easily spread in the discharge space 3 toward the surface of the front substrate 1. Therefore, the luminous efficiency is high because the surface discharge is small.

More preferably, the short side 9a of the transparent electrode 9
Bottom of recess 100 between phosphor and surface 1a (surface of phosphor 60)
Position. As a result, creeping discharge does not occur on the surface of the phosphor 60, so that it is possible to prevent the energy of electrons involved in the discharge from being taken away by the creeping discharge.

FIG. 6 shows a cross section of the first substrate S1 taken along the line VI-VI. As shown in FIG. 5 and FIG.
Is placed on the side surface of the dent 100 before the dielectric layer 11 is formed, and is placed on the front substrate 1 by reducing the width of the rib 4 where the dent 100 is not formed in the normal direction D2. It is not buried in the groove dug inside the front substrate 1 like the metal electrode 10 shown in FIG. When the transparent electrode 9 is very thin, it is very difficult to dig a groove in the front substrate 1 and embed the very thin transparent electrode 9 in the groove as in the third embodiment. Is easier to form. Of course, as long as the formation is easy, the transparent electrode 9 may be embedded in the front substrate 1 similarly to the metal electrode 10 shown in FIG. Embodiment 3
The metal electrode 10 may be configured like the transparent electrode 9 shown in FIGS.

Embodiment 6 FIG. In Embodiments 1 to 5, front substrate 1 does not have to be recessed in order to provide recess 100 or 100a. For example, in Embodiment 2,
As shown in FIG. 7, the surface of front substrate 1 may remain flat. In this case, since the surface of the front substrate 1 may be kept flat, it is not necessary to perform the processing for providing the recess.

For example, the dielectric layer 100 can be formed on the predetermined surface of the front substrate 1 having a flat surface by printing using a screen printing method, and at the same time, the recess 100 can be provided. This is not different from the conventional PDP manufacturing process.

However, the dielectric layer 11 needs to have such a thickness that the phosphor 60 is not sputtered by the sustain discharge.

As described above, since the surface of the front substrate 1 is flat, the PDP of the present invention can be manufactured using the conventional PDP manufacturing process as it is.

Embodiment 7 FIG. Since the MgO film 12 has a higher secondary electron emission coefficient γ than that of the dielectric layer 11, the MgO film 12 has a function of lowering the minimum discharge power required to generate a discharge. Therefore, in the first to sixth embodiments, if the MgO film 12 is formed where discharge is to be generated, M
Where the gO film 12 is formed, the secondary electron emission coefficient becomes large and discharge is likely to occur.

For example, as shown in FIG. 8 corresponding to FIG. 1, the MgO film 12 is deposited only on the side surface of the recess 100.
Alternatively, for example, as shown in FIG. 9 corresponding to FIG.
Only between two recesses 100a including the recess 100, M
The gO film 12 is deposited. In FIG. 8, (b) is (a)
FIG. 9 shows a cross-sectional view of the first substrate S1 along the section line VIIIb-VIIIb in FIG. 9, and FIG. 9B shows a cross-sectional view of the first substrate S1 along the section line IXb-IXb in FIG. In the structure illustrated in FIG. 9, a portion where the dielectric layer 11 is exposed may be covered with a thinner MgO film than the MgO film 12. In this case, where the thick MgO film 12 is formed, secondary electrons are more likely to be emitted and a discharge is more likely to occur as compared with the thin MgO film.

The MgO film 12 is more resistant to sputtering than the dielectric layer 11, and also has a function as a protective film for protecting the dielectric layer 11 from sputtering by electric discharge.

As described above, by covering the surface of the recess 100, the dielectric layer 11 is protected from spattering due to electric discharge, and the protective film for facilitating emission of secondary electrons on the surface of the recess 100 is provided. This makes it easier to generate a discharge in the dent 100, thereby suppressing the discharge from spreading outside the dent 100, and reducing the dielectric layer 11, particularly the dent 10.
0 can be protected from sputtering by discharge.

The MgO film 12 may be replaced with another material having a higher secondary electron emission coefficient γ than the dielectric layer 11 and resistant to sputtering.

Embodiment 8 FIG. Embodiment 8 is different from Embodiments 1 to 7 in that a frame body that protrudes above the surface of the first substrate S1 and is formed at the edge of the opening of the recess 100 is further provided.
As an example, FIG. 10 illustrates an example in which the frame body 101 is provided in Embodiment 2. In FIG. 10, (b) is a cross-sectional view of the first substrate S1 taken along a cutting line Xb-Xb in (a).
Since the frame 101 is provided, creeping discharge that tends to spread from inside the recess 100 onto the MgO film 12 on the metal electrode 10 is suppressed by the frame 101, and the discharge is concentrated inside the recess 100. For this reason, electric power is spent intensively on the discharge inside the recess 100, so that the luminous efficiency can be improved.

The frame 101 is formed, for example, by forming the recess 1 before forming the dielectric layer 11 and the MgO film 12.
A member for defining the shape of 00 is arranged at the position of the recess 100, and thereafter, the dielectric layer 11 and the MgO film 12 are formed. At this time, due to surface tension, the dielectric layer 11 and the MgO film 12 extend along the surface of the member, and the frame 101
Is formed. Then, the member arranged at the position of the recess 100 may be pulled out.

Embodiment 9 The PDP has an X electrode 7 and a Y electrode
A plurality of discharge electrode pairs composed of the electrodes 8 extend in parallel with each other. The gap between adjacent discharge electrode pairs is called a back gap. The gap between the X electrode 7 and the Y electrode 8 with respect to the back gap is called a front gap.

The size of the back gap must be sufficiently long so that discharge occurs in the front gap and no discharge occurs in the back gap. However, if the dimension L2 cannot be made sufficiently long, for example, to increase the area of the transparent electrode 9 to improve the luminance, discharge may occur in the back gap.

Therefore, in the ninth embodiment, the first embodiment
In Nos. To 8, a recess is also provided in the back gap. As an example, the back gap in the second embodiment is also recessed 100b.
FIG. 11 shows an example in which. In FIG. 11, (b) shows the first substrate S1 along the cutting line XIb-XIb in (a).
Is a sectional view, and 78 is a discharge electrode pair. Dent 100
b, compared to the case without the dent 100b,
Discharge in the back gap hardly occurs. The dimension L2 can be shortened by the extent that the discharge is less likely to occur in the back gap. Dimension L2
Is shortened, the dimension L1 can be increased, and the recess 100 in the front gap can be increased, so that the luminous efficiency can be increased.

Further, if the phosphor 60 is applied to the bottom of the recess 100b, of the ultraviolet rays generated from the discharge generated in the front gap, the ultraviolet rays leaking in the direction of the back gap will be removed.
Since the light is absorbed by the phosphor 60b and contributes to light emission, the luminous efficiency can be increased.

Note that, as shown in FIG.
May be replaced with, for example, a rectangular parallelepiped convex portion 100c in which the dielectric layer 11 is raised from the surface of the first substrate S1. In FIG. 12, (b) shows a cross-sectional view of the first substrate S1 taken along a cutting line XIIb-XIIb in (a). Even in this case, the discharge in the back gap is less likely to occur than in the case where there is no protrusion 100c. The dimension L2 can be shortened by the extent that the discharge is less likely to occur in the back gap. Since the dimension L1 can be increased and the recess 100 in the front gap can be increased by reducing the dimension L2, the luminous efficiency can be increased.

In the case where a recess or a projection is provided in the back gap, the recess 100 provided in the front gap may be omitted. Also in this case, since the dimension L1 can be lengthened and, for example, the area of the transparent electrode 9 can be increased, the luminous efficiency can be increased.

Modified example. Although the case where the front substrate 1 is dug down to increase the depth of the recess has been described, for example, as shown in FIG. In FIG. 13, (b) is a cross-sectional view of the first substrate S1 taken along section line XIIIb-XIIIb in (a). In FIG. 13, first, a first dielectric layer 11 is formed on the front substrate 1 except for a portion where the recess 100 is provided, and then a metal electrode 10 is formed on the first dielectric layer 11. Next, a second dielectric layer 11 may be formed on the first dielectric layer 11 and the metal electrode 10. In this structure, the operation can be made completely the same as that shown in FIG. 2, and the front substrate 1 does not have to be dug, so that the PDP can be easily manufactured.

The case where the first substrate S1 is divided into the front substrate 1 and the dielectric layer 11 has been described.
May be the same as the material of the front substrate 1, so that the first substrate S1
May not be divided into the front substrate 1 and the dielectric layer 11. That is, for example, the front substrate 1 and the dielectric layer 11 may be formed of the same glass substrate. The material of the front substrate 1 and the dielectric layer 11 may be other than glass.

Further, the phosphor 60 may be omitted throughout the first to ninth embodiments. Further, the second substrate S2 is the same as FIG.
Other than those shown in FIG.

[0076]

According to the first aspect of the present invention, since the first recess is provided, the rate of creeping discharge is reduced, the discharge is less susceptible to the interference of the ribs, and the discharge space is widened. Luminous efficiency is higher than in the past.

According to the second aspect of the present invention, since the first recess is deep, the discharge space becomes wider.

According to the third aspect of the present invention, since the first and second electrodes are made of only metal electrodes, the production of PDP becomes easy. In addition, since only the metal electrode is used, the opening of the first recess can be widened and the discharge space can be widened.

According to the fourth aspect of the present invention, since the metal electrodes face each other via the first recess, the size of the metal electrodes is reduced when viewed from the normal direction of the first substrate. Compared to the conventional one,
Since the light passes through the substrate, the luminous efficiency is high. Further, since the first recess is deep, discharge can be generated at a position deep from the opening of the first recess. This discharge spreads through the recess into the discharge space, but hardly spreads in the discharge space toward the surface of the first substrate. Therefore, the discharge is less susceptible to rib interference. Moreover, since the first recess is deep, the discharge space is wide.

According to the fifth aspect of the present invention, since the second recess is provided between the metal electrode and the transparent electrode, it is possible to remove the surface between the transparent electrode and the metal electrode caused by the creeping discharge. it can. Therefore, creeping discharge does not occur in the second dent. In addition, the discharge space is widened by the provision of the second recess.

According to the sixth aspect of the present invention, since the transparent electrodes face each other via the first recess and the first recess is deep, a discharge is generated at a deep position from the opening of the first recess. Can be. This discharge spreads through the recess into the discharge space, but hardly spreads in the discharge space toward the surface of the first substrate. Therefore, the discharge is less susceptible to rib interference. Moreover, since the first recess is deep, the discharge space is wide.

According to the seventh aspect of the present invention, the conventional PD
The PDP of the present invention can be manufactured using the manufacturing process of P as it is.

According to the eighth aspect of the present invention, the first discharge is performed.
The dielectric layer can be protected from spattering due to the discharge while suppressing the spread of the discharge by making it easy to generate in the recess.

According to the ninth aspect of the present invention, since the phosphor is provided on the first substrate by utilizing the first recess, the ultraviolet rays generated by the discharge, which are directed to the first substrate, hit the phosphor. Therefore, the luminous efficiency is high.

According to the tenth aspect of the present invention, the creeping discharge which spreads from the inside of the recess onto the first and second electrodes is suppressed by the frame, and the discharge is concentrated in the inside of the recess.
For this reason, electric power is spent intensively on the discharge inside the recess, so that the luminous efficiency can be improved.

According to the eleventh aspect of the present invention, since a recess is provided between adjacent discharge electrode pairs, a discharge is less likely to occur between adjacent discharge electrode pairs (back gap).
Since the discharge in the back gap is less likely to occur, the size of the back gap can be shortened to increase the size of the space between the first and second electrodes (front gap), for example, to increase the area of the first and second electrodes. Therefore, the luminous efficiency can be increased.

According to the twelfth aspect of the present invention, since the convex portion is provided between the adjacent discharge electrode pairs, a discharge is unlikely to occur between the adjacent discharge electrode pairs (back gap).
Since the discharge in the back gap is less likely to occur, the size of the back gap can be shortened to increase the size of the space between the first and second electrodes (front gap), for example, to increase the area of the first and second electrodes. Therefore, the luminous efficiency can be increased.

[Brief description of the drawings]

FIG. 1 is a partial plan view and a partial cross-sectional view illustrating a PDP according to Embodiment 1 of the present invention.

FIG. 2 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a second embodiment of the present invention.

FIG. 3 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a third embodiment of the present invention.

FIG. 4 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a fourth embodiment of the present invention.

FIG. 5 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a fifth embodiment of the present invention.

FIG. 6 is a partial sectional view showing a PDP according to a fifth embodiment of the present invention.

FIG. 7 is a partial sectional view showing a PDP according to a sixth embodiment of the present invention.

FIG. 8 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a seventh embodiment of the present invention.

FIG. 9 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a seventh embodiment of the present invention.

FIG. 10 is a partial plan view and a partial cross-sectional view illustrating a PDP according to an eighth embodiment of the present invention.

FIG. 11 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a ninth embodiment of the present invention.

FIG. 12 is a partial plan view and a partial cross-sectional view illustrating a PDP according to a ninth embodiment of the present invention.

FIG. 13 is a partial plan view and a partial cross-sectional view showing a modification of the PDP according to the embodiment of the present invention.

FIG. 14 is a perspective view showing a part of a conventional PDP.

FIG. 15 is a partial plan view and a partial cross-sectional view showing a conventional PDP.

[Explanation of symbols]

Reference Signs List 1 front substrate, 2 back substrate, 3 discharge space, 4 ribs, 5 writing electrodes, 6 phosphor, 7 X electrode, 8 Y electrode, 9 transparent electrode, 10 metal electrode, 11 dielectric layer,
12 MgO film, 60 phosphor, 78 discharge electrode pairs.

Claims (12)

[Claims] A first and a second substrate facing each other with a rib interposed therebetween to form a discharge space; and a first and a second electrode extending parallel to each other inside the first substrate. The plasma display panel according to claim 1, wherein the first substrate has a first recess between the first and second electrodes on a surface on the second substrate side. 2. The method according to claim 2, wherein the bottom of the first recess is formed between the first and second recesses.
2. The plasma display panel according to claim 1, wherein the plasma display panel is located deeper inside the first substrate than an electrode. 3. The plasma display panel according to claim 1, wherein each of the first and second electrodes comprises only a metal electrode. 4. The method according to claim 1, wherein a bottom of the first recess is formed between the first and second recesses.
The first and second electrodes are located deeper inside the first substrate than the electrodes, and each of the first and second electrodes comprises only a metal electrode, and the metal electrodes of the first and second electrodes are provided through the first recess. The plasma display panel according to claim 1, which faces each other. 5. Each of the first and second electrodes comprises a metal electrode and a transparent electrode extending apart from and parallel to each other, and the first substrate is provided between the metal electrode and the transparent electrode. The plasma display panel according to claim 1, wherein the plasma display panel has a second recess. 6. The bottom of the first recess is formed between the first and second recesses.
The plasma display panel according to claim 5, wherein the transparent electrodes of the first and second electrodes are located deeper inside the first substrate than the electrodes, and face each other via the first recess. 7. The first substrate includes: a substrate body of the first substrate; and a dielectric layer formed on the second substrate side of the substrate body and covering the first and second electrodes. The plasma display panel according to claim 1, wherein the substrate body is flat. 8. The surface of the first substrate is protected from sputtering by discharge by covering a surface of the first recess,
The plasma display panel according to claim 1, further comprising a protective film for increasing a secondary electron emission coefficient on a surface of the first recess. 9. The plasma display panel according to claim 1, further comprising a phosphor provided at a bottom of said first recess. 10. The plasma display panel according to claim 1, further comprising a frame formed at an edge of the opening of the first recess and protruding from a surface of the first substrate. 11. A semiconductor device comprising: first and second substrates facing each other with a rib interposed therebetween to form a discharge space; and a plurality of pairs of discharge electrodes extending parallel to each other inside the first substrate. The discharge electrode pair includes a first electrode and a second electrode extending in parallel with each other, and the first substrate has a recess between adjacent discharge electrode pairs on a surface of the second substrate. A plasma display panel characterized by the above-mentioned. 12. A first and second substrate facing each other with a rib interposed therebetween to form a discharge space, and a plurality of pairs of discharge electrodes extending in parallel with each other inside the first substrate. The discharge electrode pair includes first and second electrodes extending in parallel with each other, and the first substrate has a convex portion between the adjacent discharge electrode pairs on the surface on the second substrate side. A plasma display panel characterized by presenting.