JPH05205642A - Surface discharge type plasma display panel - Google Patents

Abstract

PURPOSE:To provide a surface discharge type plasma display panel, which performs full-color display and is equipped with function of presenting highly fine displaying. CONSTITUTION:A surface discharge type plasma display panel 1 in matrix display system makes full-color displaying using three types of phosphor emitting different colors, R, G, B. These three types of phosphor 28R, 28G, 28B are arranged in the sequence in the extension directions of a pair of display electrodes X, Y which bound lines of display, and three unitary light emitting regions EU in total, which mate with the three types of phosphor in the line L and adjoining one another are configured in correspondence to one picture element EG of display.

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 full-color display, and is characterized by an arrangement relationship between electrodes and phosphors.

Compared with a liquid crystal panel, a PDP is capable of high-speed display and can easily realize a large screen, so that it is expected to become the mainstream of large flat type display means of 20 inches or more. There is. Moreover, progress in the field of high-definition television is also promising. Therefore, it is desired to improve the practicality of full-color display using PDP.

[0003]

2. Description of the Related Art In a display device such as a PDP, a CRT, and a liquid crystal panel, 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 performing matrix display, that is, when displaying characters or graphics by combining pixels (dots), each pixel is associated with at least three coloring regions corresponding to the above three colors.

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

By the way, conventionally, the matrix display type P
Among DPs, an AC drive type surface discharge 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 consisting of 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 the unit light emitting region. Have and.

In order to avoid ion bombardment due to discharge, the phosphor is provided on the other substrate so as to face the electrode pair through the discharge space and is excited by the ultraviolet rays generated by the surface discharge between the display electrodes. It emits light.

FIG. 3 is a plan view schematically showing the positional relationship between the pixels EG of the conventional surface discharge type PDP 1j and the 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 the display, and a pair of display electrodes Xj and Yj is 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 (that is, four display electrodes Xj and Yj in total) correspond to these pixel EG. It is attached.

In the figure, the upper left unit light emitting area EUj in the pixel EG is a coloring area of the first color (here, R),
The upper right and lower left unit light emitting areas EUj are made to be the coloring regions of the second color (here, G), and the lower right unit light emitting areas EUj are set.
Is the coloring area of the third color (here, B). That is, the pixel EG is an essential element for color reproduction by additive color mixing.
The unit light emission area EUj of the color and the light emission color G with high relative luminous efficiency
And one unit light emitting area EUj.

Thus, by controlling the light emission of one G unit light-emission area EUj independently of the other three unit light-emission areas EUj during display, the number of pixels can be apparently increased, which is pseudo. High definition (high resolution)
Is possible.

[0013]

[Problems to be Solved by the Invention] However, the conventional PDP
In 1j, as described above, since a total of four display electrodes Xj and Yj are arranged for one pixel EG, there is a problem that it is disadvantageous in realization of high definition due to miniaturization of the pixel EG. was there.

That is, if the size of the pixel EG is reduced, it becomes difficult to form the display electrodes Xj and Yj in terms of patterning accuracy, and the allowable range of the drive voltage (in order to avoid interference of discharge between the lines L). Margin) becomes narrower. Further, the width of the display electrodes Xj and Yj becomes narrower and the disconnection is more likely to occur. Further, since one pixel EG display requires a scanning time of two lines, if the number of lines increases due to high definition, it becomes difficult to realize high-speed screen display due to restrictions on the drive circuit related to the drive frequency.

The present invention has been made in view of the above problems, and an object thereof is to provide a surface discharge type PDP suitable for high definition full color display.

[0016]

[Means for Solving the Problems] P according to the invention of claim 1
In order to solve the above-mentioned problems, the DP is configured to perform full-color display with three types of phosphors 28R, 28G, and 28B having different emission colors R, G, and B, as shown in FIGS. 1 and 2. A surface discharge type plasma display panel 1 of a matrix display system, comprising the phosphor 28
R, 28G, and 28B are sequentially arranged in the extension direction of the pair of display electrodes X and Y that define the display line L, and correspond to and are adjacent to the respective phosphors 28R, 28G, and 28B in the line L. A total of three unit light emitting areas EU are associated with one pixel EG for display.

In the PDP according to the second aspect of the present invention, the planar shape of the pixel EG is substantially square, and the planar shapes of the three unit light emitting regions EU corresponding to the pixel EG are the display electrodes X and Y, respectively. It becomes a rectangle long in the orthogonal direction.

In the PDP according to the third aspect of the present invention, the display electrodes X and Y each include a strip-shaped transparent conductor 41 and a metal layer 42 having a width narrower than that of the strip-shaped transparent conductor.
It is provided on the display surface H side with respect to R, 28G, and 28B.

[0019]

Each pixel EG constituting the display screen is composed of three unit light emitting areas EU arranged in one direction, and three unit light emitting areas EU are associated with each other for full color display.
Color phosphors 28R, 28G, and 28B are sequentially arranged.

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

As a result, there is a dimensional margin in the arrangement of electrodes for the pixels EG, which facilitates high definition display due to the miniaturization of the pixels EG.

[0022]

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 sectional structure of a portion corresponding to one pixel of PDP 1 in FIG. 1. FIG. In these figures, components having the same functions as those in FIG. 3 are designated by the same reference numerals, and
Components corresponding to those in FIG. 3 are denoted by reference numerals without the subscript “j”.

First, referring to FIG. 2, the PDP 1 is a surface discharge type PDP having a three-electrode structure, and includes a glass substrate 11 on the display surface H side and a pair of display electrodes extending in parallel to each other in the lateral direction. Dielectric layer 17 for X, Y, and AC driving, a plurality of barrier ribs 19 extending in the vertical direction, a glass substrate 21 on the back side, and a plurality of barrier ribs 19 that contact each other to define the gap size of discharge space 30. The partition walls 29, the address electrodes 22 provided between the partition walls 29, and the phosphors 28R, 28G, and 28B of the three primary colors of R (red), G (green), and B (blue) (the alphabets of reference numerals are emission colors). Corresponding) and so on.

The internal discharge space 30 is laterally divided by the barrier ribs 19 and 29 for each unit light emitting region EU, and the discharge space 30 serves as a discharge gas that emits ultraviolet rays for exciting the phosphors 28R, 28G and 28B. , Neon mixed with xenon (about 1 to 15 mol%) is 50 Penning gas.
It is enclosed so that the gas pressure is about 0 [Torr].

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

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 covering Y, an MgO film having a thickness of several thousand Å (not shown) is provided at a stage after the partition 19 is formed.

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

In the PDP 1, a pair of display electrodes X,
A selective 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 Y and the address electrode 22, and a surface discharge is provided in the vicinity of the selective discharge cell. Main discharge cells (not shown) are defined. As a result, the phosphors 28R, 28G, 2 that are continuous in the vertical direction
Of 8B, a portion corresponding to each unit light emitting area EU can be selectively made 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 forming the display screen is composed of three unit light emitting regions EU having the same area and arranged in the horizontal direction.
The planar shape of the pixel EG is a square advantageous in terms of image quality,
The planar shape of the unit light emitting region EU is a rectangle long in the vertical direction (for example, a size of about 660 μm × 220 μm). The alphabets (R, G, B) in the figure indicate the emission color of each unit emission region EU.

The pair of display electrodes X and Y described above 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 inside is half, the width of the display electrodes X and Y can be almost doubled if the area of the pixel EG is selected to be the same as the conventional one.

The wider the display electrodes X and Y, the smaller the probability of disconnection and the higher the reliability. In addition, the transparent conductor 41 can be made sufficiently wide with respect to the metal layer 42 that must have a width of a predetermined value or more in order to ensure conductivity over the entire length of the line L, and the brightness due to the expansion of the effective light emitting area can be increased. Can be improved.

That is, since the PDP 1 has a large degree of dimensional freedom when arranging the electrodes for surface discharge with respect to each pixel EG within the display surface H, the pixel EG can be miniaturized to improve the display definition. It's 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, and the interference of the discharge between the lines L is suppressed. Discharge surface (surface of dielectric layer 17)
The partition for dividing the line into lines becomes unnecessary. Therefore,
As shown in FIG. 2, the partition wall 19 can be formed in a band shape, and the partition wall formation can be simplified as compared with the case of providing a grid-shaped partition wall surrounding the unit light emitting region EU.

In the above embodiment, the phosphors 28R,
The PDP 1 called a reflection type in which 28G and 28B are provided on the glass substrate 21 on the back side is exemplified, but the phosphor 28
The present invention can be applied to a PDP called a transmission type in which R, 28G, and 28B are provided on the glass substrate 11 on the display surface H side.

[0036]

According to the present invention, high definition of full color display can be achieved. According to the second aspect of the invention, it is possible to perform high-quality full-color display with less distortion of the display image such as characters and figures.

According to the third aspect of the present invention, when the phosphor is arranged on the back side with respect to the discharge space, it is possible to improve the brightness by expanding the effective light emitting area.

[Brief description of drawings]

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

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

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

[Explanation of symbols]

 1 PDP (Surface discharge type plasma display panel) R, G, B Emission color 28R, 28G, 28B Phosphor X, Y Display electrode L Display line EG Pixel EU Unit light emitting area 41 Transparent conductor 42 Metal layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatoshi Kanae 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (3)

[Claims] 1. A surface discharge type of a matrix display system configured to perform full color display by three kinds of phosphors (28R) (28G) (28B) having different emission colors (R) (G) (B) from each other. A plasma display panel (1), wherein the phosphors (28R) (28G) (28B) are sequentially arranged in an extension direction of a pair of display electrodes (X) (Y) defining a display line (L). , Each of the phosphors (28R) (28) in the line (L)
G) A surface discharge type plasma display panel characterized in that a total of three unit light emitting areas (EU) corresponding to (28B) and adjacent to each other are associated with one pixel (EG) for display. 2. The surface discharge plasma display panel (1) according to claim 1, wherein the planar shape of the pixel (EG) is substantially square, and the three unit light emitting regions corresponding to the pixel (EG). (EU)
2. The surface discharge type plasma display panel according to claim 1, wherein the planar shape is a rectangle long in the direction orthogonal to the display electrodes (X) and (Y). 3. The surface discharge type plasma display panel (1) according to claim 1 or 2, wherein the display electrodes (X) and (Y) are strip-shaped transparent conductors (41), respectively. A surface discharge plasma display comprising a metal layer (42) having a narrower width than that of the phosphor (28R) (28G) (28B) and provided on the display surface (H) side. panel.