JPH01255130A - Plasma display panel - Google Patents

Abstract

PURPOSE:To improve the luminous brightness and efficiency and prevent a crosstalk by forming a dielectric layer on a rear glass base plate, forming a plurality of X electrodes and Y electrodes on the same surface, providing a partition barrier every discrete discharge electrode, and forming a fluorescent screen on the upper face of the electrode. CONSTITUTION:Plural lines of Y electrode groups are printed in thick film with a conductor paste on the opposite side inner face of a rear plate 2. On the upper face thereof, a first dielectric layer 4a formed by printing with a glass insulator paste is provided, and a port for connecting conductor is bored through said layer every two port every two discharging cell groups S in the line direction. The discharge faces of two X electrodes corresponding to two adjacent discharge cells S in each line, said discharge faces being in parallel to the rear plate 2, and discrete discharge electrodes 6 capable of discharging for display are formed on the upper face thereof. These are electrically bonded to the corresponding Y electrodes by the connecting conductors 7. A phosphor layer 3 is further applied to the upper face thereof and coated with a fluorescent protecting film 9, and conductive partition barriers 8 are provided thereon. Hence, an efficient luminescence can be achieved, and also those having no color crosstalk can be obtained even if the partition barriers are low.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a surface discharge plasma display panel (hereinafter simply referred to as PDP) used as a display device for displaying image information and character information. It is something.

[Prior Art] Generally, color AC (alternating current) FDPs include a counter electrode type as shown in FIG. 6 and a surface electrode type as shown in FIG. 7. Among these, the opposite '6Jf in Fig. 6, horizontal type, has a Ym electrode (Ym)... on the rear glass substrate (2) side, and an X electrode (Xn)... on the glass substrate (1) side. Furthermore, the phosphor layer (3) was formed on the same side as the X electrode (Xn). In the surface discharge type shown in Fig. 7, an X electrode (Xn) is placed on the dielectric layer (4a) on the rear glass substrate (2) side.
... and Y electrode (Ym)... are formed, and the phosphor M (3)
was formed on the front glass substrate (1) side.

[Problem to be solved by the invention] In the facing electrode type shown in FIG. 6, the phosphor layer (3) is
Although the efficiency is good because it is close to the there were. In the surface electrode shown in Fig. 7, deterioration can be prevented because the phosphor layer (3) is on the front glass substrate (1) side, avoiding the electrode surface side, but the ultraviolet light emitted during discharge does not reach the phosphor layer (3). This resulted in a decrease in luminance and efficiency. In addition, the phosphor layer (3
) is far from the electrodes, so there is a problem in that color crosstalk is likely to occur.

The object of the present invention is to obtain a surface discharge type device with a phosphor layer formed near the electrode surface to emit light efficiently and without color crosstalk even with a low partition barrier. be.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention forms a dielectric layer on a rear glass substrate, and a plurality of electrodes for surface discharge are formed on the same surface of the dielectric layer. X'KiVib and Y electrodes are formed, partition barriers are provided to separate the X and Y individual surface discharges 1 for each pole, and a phosphor film is formed on the upper surface of these X and Y individual surface discharge electrodes. It is something.

[Operation] When a discharge voltage is applied between predetermined X and Y electrodes of the X electrode group and the Y electrode group, an image appears between the discharge surface of the X electrode and the discharge surface of the individual discharge electrodes coupled to the Y electrode. A discharge occurs and the discharge emits light. At this time, since the phosphor layer is located near the light emitting part, the emitted ultraviolet rays are effectively used and the light is emitted efficiently. Furthermore, since a protective film is formed on the phosphor layer, deterioration due to sputtering is prevented.

[Example Figures 1, 2, and 3 illustrate the present invention in ACIIIiI<
This shows an example of a powered surface discharge type PDP.

In these figures, (1) and (2) are a glass front plate and a back plate serving as a substrate, which are provided facing each other.

On the inner surface of the opposite side of the back plate (2), there are a plurality of rows Ym, Ym.
The Y electrode group of +□... is printed with a thick film of conductive paste. A first dielectric layer (4a) printed with glass insulator paste is provided on the upper surface of the Y electrode group,
This first dielectric layer (4a) has two discharge cells S, S, in the column direction of a display discharge cell group S, S, etc., which will be described later.
One hole (5) for a connecting conductor is bored in each hole. On the upper surface of the first dielectric layer (4a), a discharge surface is arranged parallel to the surface of the back plate (2) and intersects with the Y electrode group in a matrix, and this intersection is used for display. A plurality of rows of discharge cells S, S, ... Xn-Xn
, 1, . . . are formed by thick film printing of conductive paste. The first dielectric J? 1 (
The upper surface of 4a) further has a discharge surface as the back plate (2).
It is possible to perform display discharge with the discharge surface of the two X electrodes parallel to the surface and corresponding to the two adjacent discharge cells S, S in each column of the discharge cell groups S, S, ... Individual discharge electrodes (6), (6), ... are formed by thick film printing of conductor paste, and these individual discharge electrodes (6), (6)
,... are holes (5), (5), etc. in the first dielectric layer (4a) for each column of the discharge cell groups S, S,...
. . are electrically coupled to the corresponding Y electrodes of the Y electrode group by connecting conductors (7), (7), . . . passing through them. A phosphor layer (3) is coated on the upper surfaces of the first dielectric layer (4a), the X electrode group and the individual discharge electrodes (6), (6), and the phosphor layer ( 3Ll: is coated with a phosphor protective film (9) and is further provided with a conductive partition plate (8) having discharge holes corresponding to the individual discharge cells S of the discharge cell groups S, S, . ) is provided.

As the phosphor protective film (9), for example, magnesium cotton (MgF2) is used, which is transparent to ultraviolet rays, resistant to sputtering by ions, and has a large secondary electron emission coefficient γ due to ions. Further, it is also possible to increase γ by forming an extremely thin MgO film or the like with a larger γ on the protective film (9). The peripheries of the front plate (1) and the back plate (2) are sealed by side plates (not shown), and a surface discharge type FDP is formed by filling discharge gas after evacuation. In addition, in FIG. 2, (10) is a gap.

When driving this surface discharge type FDP, if a scanning pulse is sequentially applied to either one of the X electrode group or the Y electrode group (for example, the X, ?l! electrode group), and a display pulse is applied to the other (for example, the Y electrode group), , xH pole (for example, Xm electrode) to which a discharge voltage is applied
Display discharge is performed between the individual discharge electrodes (6), (6)...of the Y electrode group (for example, Ym-Ym+z...electrodes), which are parallel to the back plate (2), and The discharge cells S, S, . . . discharge and emit light. At this time, in order to maintain display, adjacent X, n, and Xn, two electrodes,
If the sustain voltages applied to n, 3 and x, n+4ffi poles, etc. are in the same phase, between xn+1 and X-n, z,
Power loss due to capacitance between n, , and Xn, 4 is reduced. Furthermore, even if the distance between the X electrode and the Y electrode is widened to correspond to the display discharge cell S, it will not affect the area of the display pixel. can reduce power loss due to

In the above embodiment, the individual discharge electrodes are provided in one row for every two rows of X electrodes in the X electrode group, and one electrode in the Y electrode group is provided in each column of the discharge cell groups S, S, etc. Although the present invention is designed to reduce the number of Y electrode groups and further simplify the configuration of the immediate action circuit, the present invention is not limited to this. For example, as shown in FIG. 4, individual discharge electrodes ( 6a) (6a
)... are provided at a ratio of one row for each row of Xn, Xn, and electrodes, and individual discharge electrodes (6a) (6a)
2 lines Ym, a and Y m, b, Y for each column of...
m*t+a and Y m+□, b, . . . may be connected differently from each other by connecting conductors (7a) (7a) . Alternatively, as shown in FIG. 5, individual discharge electrodes (6b
) (6b)... each line as X n, X n *,,
... for each column of one individual discharge electrode (6b) (6b)... provided at a ratio of one row to one row of electrodes, a corresponding Ylll, via a connecting conductor (7b) (7b)...
Ymhl, . . . may be coupled to the electrodes, so that one individual IIi electrode b) corresponds to one discharge cell S.

[Effects of the Invention] Since the surface discharge type AC FDP according to the present invention is constructed as described above, compared to the conventional surface discharge type FDP in which a phosphor layer is coated on the front glass plate, in the present invention, the discharge More of the ultraviolet light emitted by the phosphor layer can reach the phosphor layer, improving the luminance and efficiency. In addition, when a phosphor layer is applied to the front glass plate as in the past, it is excited by ultraviolet light from adjacent cells and color crosstalk occurs, but in the present invention, since the phosphor layer is close to the electrode, it is possible to create a barrier. This improves efficiency and almost eliminates crosstalk problems. Furthermore, since the protective film is formed on the phosphor layer, it is possible to prevent the phosphor layer from deteriorating due to sputtering.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the FDP according to the present invention, and FIG. 1 is a sectional view taken along the line B-B in FIG.
The figure is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line A-A in Fig. 1. 4th exploded perspective view of a unit discharge cell with illustration of the second dielectric layer omitted;
The figure is a cross-sectional view showing another embodiment of the present invention, FIG. 5 is a cross-sectional view showing still another embodiment of the present invention, and FIGS. 6 and 7 are cross-sectional views of a conventional P D 1). . (1)...Front plate, (2)...Back plate (board), (
5)...hole, (6)(6a) (6b)--individual discharge electrode, (7) (7a) (7b) = connection conductor,
(8)... Conductive partition plate, (9)... Phosphor protective film, X n, X n4t... X electrode group, Y m,
Y m, a, Y m, b, Ymya1, Y m411
a+ Y m+> +b, -Y electrode group, S...discharge cell. Applicant Fujitsu General Ltd. Figure 1 Figure 2 Figure 3 \ Ym++ Figure 4 Figure 5 Prisoner 7b 7b Figure 6 \ Ym++ Figure 7

Claims (4)

[Claims] (1) Form a dielectric layer on the back glass substrate, form a plurality of X electrodes and Y electrodes for surface discharge on the same surface of this dielectric layer, and form these X and Y individual surface discharge electrodes. A plasma display panel characterized in that a partition barrier is provided for each of the X and Y individual surface discharge electrodes, and a phosphor film is formed on the upper surface of each of the X and Y individual surface discharge electrodes. (2) The plasma display panel according to claim (1), further comprising a phosphor protective film formed on the phosphor film on the upper surface of the individual surface discharge electrodes. (3) The phosphor protective film is transparent to ultraviolet rays and resistant to spatter.
The plasma display panel according to claim 2, comprising a MgF_2 film having a large secondary electron emission coefficient γ. (4) The plasma display panel according to claim (3), further comprising an MgO film having a large secondary electron emission coefficient γ formed on the phosphor protective film.