JP2000243297A - Display panel and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display panel capable of restraining unwanted discharge in a non-display region. SOLUTION: Transparent electrodes 8a, 8b are present only in a display region. Therefore, whereas the transparent electrodes 8a, 8b face to writing electrodes 4 in the display region, the transparent electrodes 8a, 8b do not face a dummy electrode 5 in a non-display region. A bus electrode 9b is formed by being bent into a crank-like form, such that the distance between a bus electrode 9a and the bus electrode 9b in the non-display region is set larger than the distance between the bus electrode 9a and the bus electrode 9b in the display region.

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 display panel, and more particularly, to a structure of an electrode of the display panel, and further to a display device having the display panel.

[0002]

2. Description of the Related Art As an example of a display panel, a surface discharge type plasma display panel (Plasma D) will be described below.
This will be described using isplay Panel (PDP) as an example. FIG.
It is sectional drawing which shows the structure of the conventional PDP typically (refer patent document 2738887). The PDP has a rear glass substrate 101 having a first main surface, and a front glass substrate 102 having a second main surface facing the first main surface with a discharge space 103 interposed therebetween. On the first main surface of the back glass substrate 101 in the display area, a plurality of write electrodes 10
4 is a direction perpendicular to the plane of the paper (in the description of the prior art, “first
(Referred to as “direction”). A dummy electrode 105 is formed on the first main surface of the rear glass substrate 101 in the non-display area so as to extend in the first direction. On the first main surface of the back glass substrate 101, barrier ribs 106 for separating discharge cells are provided between the write electrodes 104 adjacent to each other and between the dummy electrodes 105 and the write electrodes 104 adjacent to each other. Each is formed. In addition, on the write electrode 104, on the dummy electrode 105, and on the side wall of the barrier rib 106,
Phosphors 107 that emit light when irradiated with ultraviolet rays are applied.

On the second main surface of the front glass substrate 102 in the display area, a transparent electrode 108 extends in a direction perpendicular to the first direction (referred to as a "second direction" in the description of the prior art). It is formed. Also, the transparent electrode 108
A bus electrode (also referred to as a “mother electrode”) 109 having high conductivity is formed on the upper portion so as to extend in the second direction. FIG.
Since the transparent electrode 108 is formed only in the display area, the bus electrode 109 is formed on the second main surface of the front glass substrate 102 in the non-display area, as shown in FIG. An MgO film 110 is formed on the second main surface of front glass substrate 102 so as to cover transparent electrode 108 and bus electrode 109.

The back glass substrate 101 and the front glass substrate 102 are bonded to each other with a predetermined gap therebetween. A discharge gas is introduced into the gap, and the outer peripheral edge of the PDP is sealed with a sealing material 111. Thereby, a discharge space 103 is formed.

FIG. 9 is a sectional view schematically showing a sectional structure at a position X of the PDP shown in FIG. On the second main surface of the front glass substrate 102, a pair of transparent electrodes 108a and 108b are formed at predetermined intervals. On the transparent electrode 108a, a bus electrode 109a is formed at a place where light emission is not hindered.
8a and the bus electrode 109a constitute a discharge sustaining electrode 120a as one body. Similarly, the transparent electrode 108b
And a bus electrode 109b formed on the transparent electrode 108b
And constitute the discharge sustaining electrode 120b integrally.

FIG. 10 is a conceptual diagram for explaining a display area and a non-display area in a PDP. Sealing material 111
Is a non-display area in consideration of the fact that discharge of this portion becomes unstable due to outflow of discharge gas from the sealing portion. Therefore, in the non-display area of the PDP, discharge for display is not performed, and therefore, a voltage pulse for discharge is not applied to the dummy electrode 105 existing in the non-display area.

FIG. 11 is a conceptual diagram for explaining the arrangement of electrodes near the boundary between the display area and the non-display area. In particular, when viewed from the front glass substrate 102 side, the transparent electrodes 108a and 108b and the bus electrode 10
9a, 109b, write electrode 104, dummy electrode 10
5 and the arrangement relationship of the barrier ribs 106 are shown. As shown in FIG. 11, since the transparent electrodes 108a and 108b exist only in the display area, the transparent electrodes 108a and 108b and the write electrode 104 face each other in the display area, but the transparent electrodes 108a and 108b in the non-display area. 108
b and the dummy electrode 105 do not face each other. By not forming the transparent electrodes 108a and 108b in the non-display area as described above, unnecessary discharge in the non-display area can be suppressed.

[0008]

However, according to such a conventional display panel, the highly conductive bus electrodes 109a and 109b are close to each other even in the non-display area, and the electrically floating dummy The electrode 105 is susceptible to the discharge in the display area, and there is a problem that unexpected and unnecessary discharge can still occur in the non-display area.

In addition, since the transparent electrodes 108a and 108b are suddenly deleted near the boundary between the display area and the non-display area, electric field concentration is likely to occur in this area, and the vicinity of the boundary between the display area and the non-display area. There is also a problem that unnecessary discharge is likely to occur.

[0010] The present invention has been made to solve such a problem, and unnecessary discharge in a non-display area,
Another object of the present invention is to provide a display panel capable of further suppressing unnecessary discharge near a boundary between a display area and a non-display area, and a display device having the display panel.

[0011]

Means for Solving the Problems Claim 1 of the present invention
The display panel described in 1 has a first main surface,
A first substrate divided into a first region provided with a write electrode extending in a first direction on the main surface, and a second region provided with an electrode parallel to the write electrode outside the first region; A second main surface facing the first main surface across the discharge space, and extending on the second main surface in a second direction orthogonal to the first direction and over the first region. A first electrode composed of a first transparent electrode, and a first bus electrode provided over the first and second regions including on the first transparent electrode; A second transparent electrode, which extends in two directions and extends over the first region, and is paired with the first transparent electrode, and extends over the first and second regions including on the second transparent electrode. A first electrode in a second region, the first and second electrodes of a second electrode composed of a second bus electrode provided Distance between poles and the second bus electrode,
And a second substrate provided with the first and second bus electrodes so as to be larger than the distance between the first bus electrode and the second bus electrode in the first region. is there.

A display panel according to a second aspect of the present invention has a first main surface, and a first area on which a write electrode extending in a first direction is provided on the first main surface.
A first substrate divided into a second region in which an electrode parallel to the write electrode is provided outside the first region, and a second main surface opposed to the first main surface across the discharge space, A first electrode including a first transparent electrode provided on the second main surface in a second direction orthogonal to the first direction and provided at least over the first region; A second electrode, which is provided on the surface and extends over at least the first region in the second direction and includes a second transparent electrode paired with the first transparent electrode; A first transparent electrode and a second transparent electrode at an end near a boundary between the first and second regions, the distance between the first transparent electrode and the second transparent electrode being the first transparent electrode in the first region; First and second transparent electrodes having end shapes that are gradually larger than the distance between the electrode and the second transparent electrode are provided. It is characterized in further comprising a second substrate.

According to a third aspect of the present invention, the display panel according to the second aspect is the display panel according to the second aspect, wherein the second substrate includes the first and second substrates including the first transparent electrode. A first bus electrode provided over the region; and a second bus electrode provided over the first and second regions including on the second transparent electrode, the first and second bus electrodes being provided. The bus electrodes are arranged such that the distance between the first bus electrode and the second bus electrode in the second region is larger than the distance between the first bus electrode and the second bus electrode in the first region. It is characterized by being provided.

According to a fourth aspect of the present invention, a display device includes the display panel according to any one of the first to third aspects.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a cross-sectional view schematically showing a structure of a PDP according to Embodiment 1 of the present invention. PDP is a back glass substrate 1 having a first main surface.
And a front glass substrate 2 having a second main surface facing the first main surface with the discharge space 3 interposed therebetween. On the first main surface of the rear glass substrate 1 in the display area, the writing electrode 4 is formed to extend in a direction perpendicular to the paper surface (referred to as a “first direction”). Further, on the first main surface of the rear glass substrate 1 in the non-display area, the dummy electrode 5 is provided with the first electrode.
It is formed to extend in the direction. In addition, on the first main surface of the back glass substrate 1, between the write electrodes 4 adjacent to each other, and between the dummy electrode 5 and the write electrode 4 adjacent to each other.
Between them, barrier ribs 6 for dividing discharge cells are formed. Further, on the write electrode 4, on the dummy electrode 5, and on the side wall of the barrier rib 6, a phosphor 7 that emits light by irradiation with ultraviolet light is applied.

The second of the front glass substrate 2 in the display area
On the main surface, a transparent electrode 8 is formed extending in a direction perpendicular to the first direction (referred to as a “second direction”). Further, a bus electrode 9 having high conductivity is formed on the transparent electrode 8 so as to extend in the second direction. As shown in FIG. 1, since the transparent electrode 8 is formed only in the display area,
In the non-display area, the bus electrode 9 is formed on the second main surface of the front glass substrate 2. On the second main surface of the front glass substrate 2, Mg is applied so as to cover the transparent electrode 8 and the bus electrode 9.
An O film 10 is formed.

Back glass substrate 1 and front glass substrate 2
Are bonded to each other with a predetermined gap therebetween, a discharge gas is introduced into the gap, and the outer peripheral end of the PDP is sealed with a sealing material 11, whereby a discharge space 3 is formed.

FIG. 2 is a sectional view schematically showing a sectional structure at a position X of the PDP shown in FIG. On the second main surface of the front glass substrate 2, a pair of transparent electrodes 8a and 8b are formed at predetermined intervals. A bus electrode 9a is provided on the transparent electrode 8a at a place where light emission is not hindered.
Are formed, and the transparent electrode 8a and the bus electrode 9a are
The discharge sustaining electrode 20a is integrally formed. Similarly, the transparent electrode 8b and the bus electrode 9b formed on the transparent electrode 8b integrally constitute a discharge sustaining electrode 20b.

The PDP includes a discharge cell corresponding to a portion where one of the discharge sustaining electrodes 20a and 20b (scanning electrode) and the writing electrode 4 crosses three-dimensionally. During the sustain operation following the address operation, a cell to emit light (discharge cell to be discharged) is designated, and in the subsequent sustain operation, the discharge sustain electrode 20a and the discharge sustain electrode 20b are connected. In the meantime, sustain (discharge emission) is performed by applying a sustain pulse to at least the designated discharge cell. Ultraviolet rays are generated by the discharge in the sustaining operation, and the generated ultraviolet rays are radiated to the phosphor 7 to be converted into visible light to perform a desired image display.

FIG. 3 is a conceptual diagram for explaining an electrode arrangement relationship near a boundary between a display area and a non-display area. In particular, when viewed from the front glass substrate 2 side,
The arrangement relationship of the transparent electrodes 8a, 8b, the bus electrodes 9a, 9b, the write electrode 4, and the dummy electrode 5 is shown together with the barrier rib 6. As shown in FIG.
a and 8b exist only in the display area. Therefore, in the display area, the transparent electrodes 8a and 8b and the writing electrode 4 face each other, but in the non-display area, the transparent electrodes 8a and 8b and the dummy electrode 5 do not face each other. The bus electrode 9b is
It is formed in a crank shape so that the distance between the bus electrode 9a and the bus electrode 9b in the non-display area is larger than the distance between the bus electrode 9a and the bus electrode 9b in the display area. However, the bus electrode 9a may be formed by bending instead of the bus electrode 9b, or both the bus electrode 9a and the bus electrode 9b may be formed by bending. That is,
At least one of the bus electrode 9a and the bus electrode 9b so that the distance between the bus electrode 9a and the bus electrode 9b in the non-display area is larger than the distance between the bus electrode 9a and the bus electrode 9b in the display area. May be formed, for example, by bending it into a crank shape.

As described above, according to the display panel according to the first embodiment and the display device having the display panel, the transparent electrodes 8a and 8b
Does not exist, and the bus electrode 9a and the bus electrode 9b
Is formed so that the distance between the two in the non-display area is larger than the distance between the two in the display area, so that unnecessary discharge in the non-display area can be further suppressed as compared with the conventional display panel. it can.

Embodiment 2 FIG. FIG. 4 is a conceptual diagram for describing an electrode arrangement relationship near a boundary between a display area and a non-display area in the PDP according to Embodiment 2 of the present invention. As in FIG. 3, the arrangement relationship of the transparent electrodes 8 a and 8 b, the bus electrodes 9 a and 9 b, the write electrode 4 and the dummy electrode 5 when viewed from the front glass substrate 2 side
It is shown together with. As shown in FIG. 4, at the end near the boundary between the display area and the non-display area, the distance between the transparent electrode 8a and the transparent electrode 8b is different from that of the transparent electrode 8a and the transparent electrode 8b in the display area. 8b is formed so as to be gradually larger than the gap with 8b. The bus electrodes 9a and 9b are formed linearly from the display area to the non-display area, similarly to the conventional PDP shown in FIG. Embodiment 2 of the present invention
The other structure of the PDP according to the first embodiment is the same as the structure of the PDP according to the first embodiment shown in FIGS.

FIG. 5 is a conceptual diagram for explaining another electrode arrangement relationship near the boundary between the display area and the non-display area in the PDP according to the second embodiment of the present invention. As shown in FIG. 5, at the end near the boundary between the display area and the non-display area, the distance between the transparent electrode 8a and the transparent electrode 8b is set such that the transparent electrode 8a, 8b
It is formed so as to be gradually larger than the distance between the transparent electrode 8a and the transparent electrode 8b. Other configurations of the electrode arrangement shown in FIG. 5 are the same as the electrode arrangement shown in FIG.

As described above, according to the display panel according to the second embodiment and the display device having the display panel, the transparent electrodes 8a and 8b may be suddenly deleted near the boundary between the display area and the non-display area. Instead, the transparent electrodes 8a and 8b are formed such that the distance between the transparent electrodes 8a and 8b gradually becomes larger than the distance between the transparent electrodes 8a and 8b in the display area. Therefore, the electric field concentration at the ends of the transparent electrodes 8a and 8b can be reduced, and the occurrence of unnecessary discharge near the boundary between the display area and the non-display area can be suppressed.

Further, when the ends of the transparent electrodes 8a and 8b are inclined or rounded, the ends of the transparent electrodes 8a and 8b are formed so as to extend to the non-display area side, so that the rear glass substrate 1 It is also possible to increase the permissible error in bonding the front glass substrate 2.

Embodiment 3 FIG. FIG. 6 is a conceptual diagram for describing an electrode arrangement relationship near a boundary between a display area and a non-display area in a PDP according to Embodiment 3 of the present invention. As in FIG. 3, the arrangement relationship of the transparent electrodes 8 a and 8 b, the bus electrodes 9 a and 9 b, the write electrode 4 and the dummy electrode 5 when viewed from the front glass substrate 2 side
It is shown together with. The bus electrode 9b is formed to be bent in a crank shape such that the distance between the bus electrode 9a and the bus electrode 9b in the non-display area is larger than the distance between the bus electrode 9a and the bus electrode 9b in the display area. . Further, at the end of the boundary between the display area and the non-display area, the distance between the transparent electrode 8a and the transparent electrode 8b is set such that the distance between the transparent electrode 8a and the transparent electrode 8b in the display area is smaller.
It is formed so as to be gradually larger than the distance between the transparent electrode 8b and the transparent electrode 8b. That is, the electrode arrangement relationship shown in FIG. 6 corresponds to the P-position according to the first embodiment shown in FIG.
DP electrode arrangement and the second embodiment shown in FIG.
And the electrode arrangement relationship of the PDP according to the above. Another structure of the PDP according to the third embodiment of the present invention is the same as that of the PD according to the first embodiment shown in FIGS.
It has the same structure as P.

FIG. 7 is a conceptual diagram for explaining another electrode arrangement relationship near the boundary between the display area and the non-display area in the PDP according to the third embodiment of the present invention. The electrode arrangement relationship shown in FIG. 7 is a combination of the electrode arrangement relationship of the PDP according to the first embodiment shown in FIG. 3 and the electrode arrangement relationship of the PDP according to the second embodiment shown in FIG. Is equivalent to

As described above, according to the plasma display panel according to the third embodiment and the display device having the display panel, the P display according to the first embodiment is used.
Bus electrodes 9a and 9b in DP and the second embodiment
By combining the transparent electrodes 8a and 8b in the PDP according to the above, unnecessary discharge in the non-display area can be further suppressed as compared with the conventional display panel, and the vicinity of the boundary between the display area and the non-display area can be further reduced. In this case, unnecessary discharge can be prevented from occurring, and the allowable error in bonding the rear glass substrate 1 and the front glass substrate 2 can be increased.

[0029]

According to the first aspect of the present invention, since the first and second transparent electrodes are formed only in the first region, the first and second transparent electrodes are formed in the second region. The two transparent electrodes do not face the electrodes parallel to the writing electrodes. Moreover, the distance between the first bus electrode and the second bus electrode in the second region is equal to the distance between the first bus electrode and the second bus electrode.
The first bus electrode is provided so as to be larger than the distance between the first bus electrode and the second bus electrode in the first region. Therefore, unnecessary discharge in the second region can be suppressed.

According to the second aspect of the present invention, at the end near the boundary between the first and second regions, the distance between the first transparent electrode and the second transparent electrode is: The distance gradually becomes larger than the distance between the first transparent electrode and the second transparent electrode in the first region. Therefore, the first and second
The electric field concentration at each end of the transparent electrode can be reduced, and the generation of unnecessary discharge near the boundary between the first region and the second region can be suppressed.

According to the third aspect of the present invention, the first and second bus electrodes are arranged such that an interval between the first bus electrode and the second bus electrode in the second region is Since it is provided so as to be larger than the distance between the first bus electrode and the second bus electrode in the first region, unnecessary discharge in the second region can also be suppressed.

According to the fourth aspect of the present invention, unnecessary discharge in the second region and unnecessary discharge in the vicinity of the boundary between the first region and the second region can be suppressed. By using the display panel, a high-quality display device can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view schematically showing a cross-sectional structure at a position X of the PDP shown in FIG.

FIG. 3 is a conceptual diagram for explaining an electrode arrangement relationship near a boundary between a display area and a non-display area.

FIG. 4 is a conceptual diagram for explaining an electrode arrangement relationship near a boundary between a display area and a non-display area in the PDP according to the second embodiment of the present invention.

FIG. 5 is a conceptual diagram for explaining another electrode arrangement relationship near a boundary between a display area and a non-display area in the PDP according to the second embodiment of the present invention.

FIG. 6 is a conceptual diagram for describing an electrode arrangement relationship near a boundary between a display area and a non-display area in a PDP according to Embodiment 3 of the present invention.

FIG. 7 is a conceptual diagram for explaining another electrode arrangement relationship near a boundary between a display area and a non-display area in the PDP according to Embodiment 3 of the present invention.

FIG. 8 is a cross-sectional view schematically showing the structure of a conventional PDP.

9 is a cross-sectional view schematically showing a cross-sectional structure at a position X of the PDP shown in FIG.

FIG. 10 is a conceptual diagram for explaining a display area and a non-display area in a PDP.

FIG. 11 is a conceptual diagram for explaining an arrangement relationship of electrodes near a boundary between a display area and a non-display area.

[Explanation of symbols]

Reference Signs List 1 back glass substrate, 2 front glass substrate, 3 discharge space, 4 writing electrode, 5 dummy electrode, 8, 8a, 8b
Transparent electrodes, 9, 9a, 9b Bus electrodes.

Claims (4)

[Claims] A first region having a first main surface, wherein a write electrode extending in a first direction is provided on the first main surface; and a write electrode provided outside the first region. A first substrate divided into a second region in which parallel electrodes are provided; and a second main surface facing the first main surface with a discharge space interposed therebetween, wherein the second main surface is provided on the second main surface. A first transparent electrode extending in the second direction orthogonal to the one direction and provided over the first region, and over the first and second regions including on the first transparent electrode; A first electrode composed of a first bus electrode provided; a first transparent electrode provided on the second main surface to extend in the second direction over the first region; And a second bus electrode provided over the first and second regions, including on the second transparent electrode. Has more second electrodes comprised, the first and second electrodes of the said in the second region the first bus electrode and the second
The first and second bus electrodes are provided such that an interval between the first and second bus electrodes is larger than an interval between the first bus electrode and the second bus electrode in the first region. A display panel, comprising: two substrates. 2. A first region having a first main surface, on which a write electrode extending in a first direction is provided on the first main surface; and a write electrode provided outside the first region. A first substrate divided into a second region in which parallel electrodes are provided; and a second main surface facing the first main surface with a discharge space interposed therebetween, wherein the second main surface is provided on the second main surface. A first electrode configured to include a first transparent electrode that extends in a second direction orthogonal to the one direction and is provided at least over the first region; The first and second electrodes of a second electrode extending in two directions and provided at least over the first region and including a second transparent electrode paired with the first transparent electrode. A second electrode, at an end near a boundary between the first and second regions,
The distance between the first transparent electrode and the second transparent electrode is
The first transparent electrode and the second transparent electrode in the first region;
And a second substrate provided with the first and second transparent electrodes having end shapes that gradually become larger than the distance between the first and second transparent electrodes. 3. The second substrate includes: a first bus electrode provided over the first and second regions including the first transparent electrode; and a second bus electrode including the second transparent electrode. A second bus electrode provided over first and second regions, wherein the first and second bus electrodes are connected to the first bus electrode in the second region and the second bus electrode. 3. The distance between the first bus electrode and the second bus electrode in the first region is provided to be larger than the distance between the first bus electrode and the second bus electrode in the first region. Display panel. 4. A display device comprising the display panel according to claim 1.