JP2731480B2 - Surface discharge type plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-discharge type plasma display panel (PDP) for performing full-color display, and is particularly characterized by a positional relationship between electrodes and phosphors.

2. Description of the Related Art PDPs are expected to become the mainstream of large-sized flat display means, especially 20 inches or more, because they can display at high speed and can easily realize a large screen as compared with liquid crystal panels. I have. Also, progress in the field of high definition television is promising. Therefore, it is desired to improve the practicality of full-color display using PDP.

[0003]

2. Description of the Related Art In display devices such as PDPs, CRTs, and liquid crystal panels, full-color display is performed by, for example, R
It is performed by appropriately combining three different colors such as (red), G (green), and B (blue).

When a matrix display is performed, that is, when a character or a graphic is displayed by a combination of pixels (dots), at least three color regions corresponding to the above three colors are associated with each pixel.

Various arrangements have been proposed for the arrangement of the coloring regions of each color in a pixel. For example, three color regions are arranged in a row in the horizontal or vertical direction.
There is an example in which color developing regions are arranged such that their centers correspond to the vertices of a triangle (so-called delta arrangement).

[0006] Conventionally, a matrix display type P
Among the DPs, an AC-driven surface discharge type PDP is known as a PDP having a structure suitable for full-color display using a phosphor.

For example, a surface discharge type PDP having a three-electrode structure is:
A plurality of electrode pairs each including a pair of display electrodes arranged adjacent to each other in parallel on one substrate, and a plurality of address electrodes arranged so as to be orthogonal to each electrode pair to selectively emit light in a unit light emitting region. And

The phosphor is provided on the other substrate so as to be opposed to the electrode pair via a discharge space in order to avoid ion bombardment due to discharge, and is excited by ultraviolet rays generated by surface discharge between display electrodes. Emits light.

FIG. 3 is a plan view schematically showing an arrangement relationship between pixels EG of the conventional surface discharge type PDP 1j and display electrodes Xj and Yj. In FIG. 3, each row of unit light emitting regions EUj arranged in the horizontal direction corresponds to one line L in display, and a pair of display electrodes Xj and Yj are arranged for each line L. In other words, each line L is defined by a pair of display electrodes Xj and Yj.

In the PDP 1j, each pixel EG is composed of a total of four unit light-emitting areas EUj arranged vertically and horizontally, and two lines L (ie, a total of four display electrodes Xj, Yj) correspond to these pixels EG. It is attached.

In the figure, an upper left unit light emitting area EUj in a pixel EG is a color emitting area of a first color (here, R),
Each of the upper right and lower left unit light emitting regions EUj is a color developing region of the second color (here, G), and each lower right unit light emitting region EUj.
Are the color development areas of the third color (B in this case). In other words, the pixel EG is required for color reproduction by additive color mixture.
The unit emission area EUj of the color and the emission color G
And one unit light-emitting region EUj.

Thus, by controlling the light emission of one G unit light emitting region EUj independently of the other three unit light emitting regions EUj during display, the number of pixels can be increased in appearance, and pseudo High definition (high resolution)
Becomes possible.

[0013]

However, conventional PDPs
In 1j, as described above, a total of four display electrodes Xj and Yj are arranged for one pixel EG, which is disadvantageous in realizing high definition by miniaturization of the pixel EG. was there.

That is, if the size of the pixel EG is reduced, it is difficult to form the display electrodes Xj and Yj on the basis of the patterning accuracy, and the allowable range of the driving voltage ( Margin) becomes narrower. Further, the width of the display electrodes Xj and Yj is further narrowed, and disconnection is likely to occur. Further, since the scanning time for two lines is required to display one pixel EG, if the number of lines increases due to the high definition, it is difficult to realize a high-speed screen display due to a restriction on a driving circuit related to a driving frequency.

An object of the present invention is to provide a surface discharge type PDP suitable for high-definition full-color display in view of the above problems.

[0016]

Means for Solving the Problems The P according to the first aspect of the present invention.
DP includes a plurality of pairs of parallel display electrodes X and Y that define a display line L on a substrate 11 on the display surface side, and a plurality of pairs in a direction orthogonal to the display electrodes X and Y on a substrate 21 on the back side. The surface discharge type plasma display panel 1 for color display in which the address electrodes 22 and three kinds of phosphors 28R, 28G, 28B having different emission colors R, G, B from each other are arranged, and the discharge space 30 is partitioned. At the same time, band-shaped partitions 19 and 29 for defining the gap size of the discharge space 30 are arranged between the address electrodes 22, and the respective partitions 1
9 and 29, the phosphors 28R, 28G and 28B
A total of 3 corresponding to and adjacent to the respective phosphors 28R, 28G, 28B in the line L
One unit light emitting area EU is associated with one pixel EG for display.

[0017]

[0018]

[0019]

Each pixel EG constituting the display screen is composed of three unit light emitting regions EU arranged in one direction.
The color phosphors 28R, 28G, and 28B are arranged in order.

In each of the pixels EG, a pair of display electrodes X and Y extending in the arrangement direction of the unit light emitting areas EU, that is, a total of two display electrodes X and Y are provided as electrodes for generating surface discharge. Is arranged. That is, the pixel EG
Is associated with one line L in the display.

As a result, when arranging the electrodes with respect to the pixel EG, there is a margin in dimension, so that it is easy to achieve high definition display by miniaturizing the pixel EG.

[0022]

FIG. 1 is a plan view schematically showing an arrangement relationship between a pixel EG and display electrodes X and Y of a PDP 1 according to the present invention.
FIG. 2 is an exploded perspective view showing a cross-sectional structure of a portion corresponding to one pixel of the PDP 1 of FIG. In these figures, components having the same functions as those in FIG. 3 are denoted by the same reference numerals,
Components corresponding to those in FIG. 3 are denoted by reference numerals without the suffix “j”.

First, referring to FIG. 2, a PDP 1 is a surface discharge type PDP having a three-electrode structure, in which a glass substrate 11 on a display surface H side, a pair of display electrodes extending adjacent to each other in a horizontal direction and parallel to each other. Dielectric layer 17 for X, Y, and AC driving, a plurality of partition walls 19 extending in the vertical direction, a glass substrate 21 on the back side, and a plurality of gaps defining discharge space 30 by contact with each partition wall 19. The partition walls 29, the address electrodes 22 provided between the partition walls 29, and the phosphors 28R, 28G, 28B of three primary colors of R (red), G (green), and B (blue) Corresponding).

The internal discharge space 30 is partitioned by the partition walls 19 and 29 into unit light emitting areas EU in the lateral direction. The discharge space 30 is provided with a discharge gas that emits ultraviolet rays that excite the phosphors 28R, 28G and 28B. , A mixture of neon mixed with xenon (about 1 to 15 mol%),
It is sealed so as to have a gas pressure of about 0 [Torr].

The display electrodes X and Y are connected to the phosphors 28R and 28R.
G and 28B are arranged on the display surface H side.
It is composed of a strip-shaped transparent conductor 41 (having a width of about 180 μm) and a metal layer 42 (having a width of about 80 μm) for supplementing its conductivity. The transparent conductor 41 is formed of a Nesa film (tin oxide film), and the metal layer 42 is formed of, for example, a chromium-copper-chromium three-layer thin film.

The distance (discharge gap) between the display electrodes X and Y is selected to be about 40 μm.
On the surface of the dielectric layer 17 that covers Y, an MgO film (not shown) having a thickness of about several thousand degrees is provided at a stage after the partition wall 19 is formed.

The phosphors 28R, 28G, and 28B are arranged from left to right to fill the spaces between the partition walls 29.
G and B are provided in this order. Phosphor 28 whose emission color is R
R is composed of, for example, (Y, Gd) BO ₃ : Eu ³⁺ , the phosphor 28 G having a luminescent color of, for example, Zn ₂ SiO ₄ : Mn, and the phosphor 28 B having a luminescent color of, for example, BaMgA.
l ₁₄ O ₂₃ : consists of Eu ²⁺ . These phosphors 28R, 28
The compositions of G and 28B are selected so that the mixture of the three colors becomes white when excited simultaneously under the same conditions.

In the PDP 1, a pair of display electrodes X,
A selected discharge cell (not shown) for selecting display or non-display of the unit light emitting region EU is defined at each intersection of one of the Y and the address electrode 22, and is provided near the selected discharge cell for surface discharge. Of main discharge cells (not shown) are defined. As a result, each of the phosphors 28R, 28G, 2
8B, a portion corresponding to each unit light emitting region EU can be selectively caused to emit light, and full color display can be performed by a combination of R, G, and B.

As shown in FIG. 1, in the PDP 1, each pixel EG constituting the display screen is composed of three unit light emitting regions EU of the same area arranged in the horizontal direction.
The planar shape of the pixel EG is a square which is advantageous in terms of image quality,
The planar shape of the unit light emitting region EU is a vertically long rectangle (for example, a size of about 660 μm × 220 μm). In addition, the alphabet (R, G, B) in the figure has shown the light emission color of each unit light emission area EU.

The above-mentioned pair of display electrodes X and Y are associated with such a pixel EG. That is, at the time of display, one pixel EG corresponds to one line L.

Therefore, as in the conventional PDP 1j, 1
Compared to the case where two lines are associated with the pixel, the pixel EG
Since the number of electrodes arranged in each pixel is halved, if the area of the pixel EG is selected to be the same as the conventional one, the width of the display electrodes X and Y can be almost doubled.

The greater the width of the display electrodes X and Y, the lower the probability of disconnection and the higher the reliability. Further, the transparent conductor 41 can be sufficiently widened with respect to the metal layer 42 which must have a width equal to or more than a predetermined value in order to secure conductivity over the entire length of the line L, and the luminance due to an increase in the effective light emitting area can be obtained. Can be improved.

In other words, the PDP 1 has a large degree of freedom in arranging the surface discharge electrodes with respect to each pixel EG in the display surface H, so that a high definition display can be achieved by miniaturizing the pixel EG. Relatively easy.

According to the above-described embodiment, the display electrodes X and the display electrodes Y between the lines L are arranged with a distance of about 200 μm, thereby suppressing the interference of discharge between the lines L. Discharge surface (surface of dielectric layer 17)
Is no longer necessary to partition the lines for each line. Therefore,
As shown in FIG. 2, the shape of the partition wall 19 can be band-shaped, and the partition wall formation can be simplified as compared with the case where a grid-shaped partition wall surrounding the unit light emitting region EU is provided.

Further, as in the above-described embodiment, the planar shape of the unit light emitting region EU is changed in the direction of the address electrode 22 (vertical direction).
By setting the pixel EG including the three unit light emitting regions EU to be approximately square, a high-quality full-color display with little distortion of a display image such as a character or a figure can be performed.

[0036]

According to the first aspect of the present invention, two lines correspond to one line.
It is easier to miniaturize the pixel than in the case where it is associated with the pixel, and it is easier to form the partition than in the case where a grid-like partition is provided. Therefore, high definition of full color display can be achieved.

[0037]

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an arrangement relationship between pixels of a PDP and display electrodes according to the present invention.

FIG. 2 is an exploded perspective view showing a cross-sectional structure of a portion corresponding to one pixel of the PDP of FIG.

FIG. 3 is a plan view schematically illustrating a positional relationship between pixels and display electrodes of a conventional PDP.

[Description of Signs] 1 PDP (Surface Discharge Plasma Display Panel) R, G, B Emission Color 28R, 28G, 28B Phosphor X, Y Display Electrode L Display Line EG Pixel EU Unit Emission Area 41 Transparent Conductor 42 Metal layer

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tatsutoshi Kanae 1015 Kamikodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-3-77238 (JP, A) JP-A-1- 304638 (JP, A) JP-A-3-101031 (JP, A) JP-B-55-5563 (JP, B2)

Claims (1)

(57) [Claims] 1. A pair of parallel display electrodes defining a display line on board of the display surface side is a plurality of sets disposed rear side of the base plate
Oh In surface discharge type plasma display panel of the display electrodes orthogonal to the direction of the plurality of addresses conductive Goku及 <br/> beauty mutually color for display and light emitting colors different three phosphors are arranged in the < Therefore, the discharge space is partitioned and the gap size of the discharge space is reduced.
The band-like partition walls which define and placed between the respective address electrodes, provided in a strip of the phosphor one by one between the respective septum wall, adjacent to and along said the line in each phosphor versus
Surface discharge type plasma display panel, characterized in that attached pair <br/> respond to 1 Tsunoe element display a total of three unit light-emitting area you respond.