JPH03250536A - Plasma display panel - Google Patents

Abstract

PURPOSE:To accomplish highly fine display without impairing the reliability by furnishing a band-shaped discharge electrode with an overhang part enclosed with a wall which partitions picture element, and strengthening the close contact force with the base board. CONSTITUTION:A voltage exceeding the discharge start level is impressed between main discharge electrodes 13, 14 of each discharge maintaining electrode couple 12 to actuate the start of discharging line by line, and then a discharge erase pulse is fed to an address electrode 22 corresponding to picture element which is unnecessary for displaying for each line to cause the corresponding discharge cell SC wall electric charges to vanish, and thus discharging is stopped. A voltage lower than the discharge start voltage is impressed to the electrode couple 12, an discharging is continued about the cell SC corresponding to the picture element displayed. Fluorescent substance 28 is energized by ultraviolet rays due to discharge, and light emission is made. At this time, overhand parts 13a, 14a are apart from the discharging space 30, so that there is no influence upon light emission.

Description

[Detailed Description of the Invention] (Summary) Regarding a plasma display panel, the present invention aims to provide a plasma display panel that achieves high-definition display without impairing credibility. The plasma display panel is provided with a discharge electrode and a partition wall for dividing a pixel area, characterized in that the discharge electrode is provided with an overhang portion covered by the partition wall.

[Industrial Application Field] The present invention relates to a plasma display panel (PDP) that enables high-definition display.

FDP has excellent visibility among various flat display devices, and its applications are expanding.

Therefore, higher definition (increase in display density) including color display is desired.

[Conventional technology]

PDPs with a donto matrix display method display characters and figures by combining dots (pixels) that emit light.
A pair of glass substrates on the display surface side and the rear side are arranged facing each other with a discharge space provided, so that each discharge cell defined at or near each intersection of strip-shaped electrodes arranged in a grid is selectively discharged. It is composed of

In such an FDP, a structure is known in which a phosphor that emits light by discharge is provided to enable multicolor display (for example, a surface discharge type FDP disclosed in Japanese Patent Application Laid-Open No. 62-219438).

Although the phosphor may be provided on either of the pair of substrates, it is advantageous to provide it on the rear substrate in terms of display brightness.

In addition, when the discharge form is a surface discharge type, in order to prevent deterioration of the phosphor, the electrode (
The main discharge electrode) is provided on the substrate on the side where the phosphor is not provided. That is, when the phosphor is provided on the substrate on the back side, the main discharge electrode is provided on the substrate on the display surface side.

Further, particularly in FDPs for color display, partition walls (ribs) are provided to divide the discharge space for each pixel in order to improve the color separation M (segregation) between adjacent pixels.

[Problems to be Solved by the Invention] Needless to say, when achieving high definition display, it is necessary to reduce the width of the electrodes and the pitch between the electrodes in accordance with the reduction of each pixel area.

Further, when providing an electrode made of a metal film on the substrate on the display surface side, which is advantageous in terms of manufacturing cost, it is desirable to make the width of the electrode as small as possible in order to prevent a reduction in brightness due to light shielding.

However, when the width of the electrode is made small, the adhesion with the substrate decreases, making it easy to peel off from the substrate, resulting in a problem that the reliability of the PDP is impaired.

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 that achieves high-definition display without impairing credibility.

[Means to solve the problem]

In order to solve the above-mentioned problems, the FDP according to the present invention has a structure in which a plurality of band-shaped discharge electrodes 13 and 14 and a pixel area GE are defined on the surface of the substrate 10, as shown in FIGS. 1 and 2. In the plasma display panel 1 provided with the barrier ribs 15, the discharge electrodes 13.14 are provided with the barrier ribs 15.
5, overhanging portions 13a and 14a are provided.

(Function) The discharge electrode 13 is reduced by the amount that the overhanging portions 13a and 14a are provided.
．． 14 and the substrate 10 increases, the discharge electrode 1
3. The adhesion between i and the substrate material 0 is strengthened.

Since the overhanging parts 13a and 14a are covered by the partition wall 15, no discharge occurs in the overhanging parts 13a and 14a.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the main parts of a PDP 1 according to the present invention;
FIG. 2 is a cross-sectional front view showing a PDP I according to the present invention, and FIG. 3 is a plan view of the PDP I as viewed from the arrow .

In FIGS. 2 and 3, the PDP 1 includes a glass substrate 10 whose top surface in FIG. A plurality of discharge sustaining electrode pairs 12 each consisting of a pair of parallel main discharge electrodes 13 and 14, a lattice-shaped partition wall 15,
A plurality of address electrodes 22 extending in the vertical (Y) direction on the inner surface of the glass substrate 20, partition walls 25 extending in the vertical direction provided between each address electrode 22, and partition walls 25 arranged at predetermined intervals in the vertical direction between each partition wall 25. Phosphors 28, 28... of a predetermined luminescent color are provided so as to expose the address electrodes 22.
The internal discharge space 30 is filled with a mixed gas of neon and xenon, for example.

The discharge sustaining electrode pair 12 is formed by patterning a sputter-deposited three-layer metal film (film thickness: approximately 5,000 layers) consisting of chromium (Cr)-copper (Cu)-chromium using a photolithography method.

The main discharge electrodes 13.14 of each discharge sustaining electrode pair 12 are provided with projecting portions 13a, 14a extending between the main discharge electrodes 13.14 at regular intervals in the lateral direction.

FIG. 1 shows the glass substrate 10 viewed from the discharge space 30 side, and as clearly shown in FIG. Thereby, the overhanging parts 13a and 14a are isolated from each other without being directly exposed to the discharge space 30.

Each sustaining electrode pair 12 is covered with a dielectric layer (not shown) and a protective layer made of magnesium oxide (MgO) or the like.

Returning to FIGS. 2 and 3, the partition walls 15 and 25 intersect three-dimensionally in the discharge space 30 so that their tops abut each other, and the partition walls 15 and 25 partition the pixel region GE. has been done.

That is, the rectangular pixel region GE surrounded by the partition wall 15 corresponds to one dot. The partition wall 15 is formed by screen printing low melting point glass, and has a width of about 50 μm. Further, in one pixel region GE, the horizontal interval of the partition walls 15 is 0.1 to 0.
The distance is approximately 12 mm, and the vertical spacing is 0.3 to 0.36.
It is said to be about mm.

In the PDP 1, an address discharge cell WC for selecting a display pixel is defined at the intersection of the main discharge electrode 13 and the address electrode 22, which face each other with a discharge space 30 in between. Display discharge cells SC are defined in mutually opposing portions of the discharge electrodes 13 and 14.

When displaying on the PDP 1 configured as described above, first, the main discharge electrode 1 of each discharge sustaining electrode pair 12 is
3 and the main electrode 14 to start a discharge in line units by applying a voltage exceeding the discharge starting voltage, and then for each line, the discharge is erased to the address electrode 22 corresponding to the pixel unnecessary for display. Apply a pulse to the corresponding discharge cell S
At C, the wall charge is dissipated and the discharge is stopped.

A discharge sustaining voltage lower than the discharge starting voltage is applied to the discharge sustaining electrode pair 12, and discharge continues in the discharge cell SC corresponding to the display pixel. As a result, the phosphor 28 facing the discharge cell SC during discharge is excited by the ultraviolet rays generated by the discharge and emits light.

At this time, as described above, since the overhanging portions 13a14a are separated from the discharge space 30, the overhanging portions 13a, 1
4a does not affect light emission 6 FIG. 4 is a plan view showing the main parts of a PDP 1a according to another embodiment of the present invention. In addition, FIG. 4 shows the display surface 10F side viewed from the discharge space 30 similarly to FIG. 1, and in the same figure, components having the same functions as in FIGS. The symbol is attached.

In the PDP 1a, the glass substrate 10 on the display surface side
A discharge sustaining electrode pair 120 consisting of a pair of parallel main discharge electrodes 130 and 140 is provided on the surface of the pixel region GE so as to pass through the vertical center of the pixel region GE defined by the partition wall 15 . Therefore, the bright spots for display are mainly at both ends of the pixel region GE in the vertical direction.

The main discharge electrodes 13 and 14 of each discharge sustaining electrode pair 12 are provided with overhanging portions 130a and 140a that overhang toward both ends of the pixel region GE in the vertical direction at regular intervals in the horizontal direction. 130a and 140a are covered with a partition wall 15.

According to the above embodiment, the width of the main discharge electrodes 13 and 14 made of a metal film provided on the glass substrate 10 on the display surface side is 50 μm.
It can be made as small as about m, and the brightness can be increased by increasing the amount of light emitted from the display surface 10F.

In the above embodiment, the overhangs 13a, 14a, 13
0a and 140a may be covered by the partition wall 15, and their planar shape and arrangement interval may be appropriately selected.

In the embodiments described above, the arrangement relationship between the address electrode 22 and the phosphor 28 inside the pixel region GE and the exposure state of the address electrode 22 can be changed as appropriate.

In the above-described embodiment, a PDPI in which the phosphor 28 is formed on the surface of the glass substrate 20 on the back side is illustrated, but the present invention is also applicable to an FDP in which the phosphor 28 is provided on the glass substrate 10 on the display side. be able to. Further, the discharge form is not limited to the surface discharge type, but may be a facing discharge type.

〔Effect of the invention〕

According to the present invention, high definition display can be achieved without impairing credibility.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of a PDP according to the present invention, FIG. 2 is a cross-sectional front view showing an FDP according to the present invention, FIG. 3 is a plan view taken in the direction of the ■ arrow in FIG. FIG. 7 is a plan view showing the main parts of a PDP according to another embodiment of the present invention. In the figure, l is an FDP (plasma display panel), 10 is a glass substrate (substrate), 1314 is a main discharge electrode (discharge electrode), 13a, 14a
15 is a partition, 130.140 is a main discharge electrode (discharge electrode) 130a
140a is an overhang, and GE is a pixel area. ;+ P7-

Claims (1)

[Claims] (1) A plasma display panel ( 1 ), the discharge electrodes (13) and (14) are provided with the partition wall (15).
A plasma display panel characterized in that it is provided with overhanging portions (13a) and (14a) covered with.