JP3659446B2 - Plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flop plasma display panel (PDP).
[0002]
[Prior art]
Here, a PDP is taken as a representative example of a color display device using a phosphor. In general, a PDP has a structure in which a pair of electrodes regularly arranged on two opposing glass substrates are provided, and a gas mainly composed of an inert gas such as Ne or Xe is enclosed therebetween. Then, a voltage is applied between these electrodes, and discharge is generated in minute cells around the electrodes, thereby causing each cell to emit light for display. In order to display information, cells arranged regularly are selectively discharged. There are two types of PDPs: a DC type (DC type) with electrodes exposed in the discharge space and an AC type (AC type) covered with an insulating layer, both of which vary depending on the display function and driving method. Further, it is classified into a refresh driving method and a memory driving method.
[0003]
FIG. 1 shows an example of the configuration of an AC type PDP. This figure shows a state in which the front plate and the back plate are separated from each other. As shown in the figure, two glass substrates 1 and 2 are arranged in parallel and facing each other, and both serve as a back plate. The cell barriers 3 provided in parallel to each other on the glass substrate are held at regular intervals. On the back side of the glass substrate 1 serving as the front plate, a composite electrode 6 composed of a sustain electrode 4 that is a transparent electrode and a bus electrode 5 that is a metal electrode is formed in parallel to each other. And a protective layer 8 (MgO layer) is further formed thereon. Further, an addressing electrode 9 is formed between the cell barriers 3 so as to be orthogonal to the composite electrode 6 on the front plate side of the glass substrate 2 serving as a back plate, and is further formed parallel to each other. The phosphor 10 is provided so as to cover the cell bottom surface.
[0004]
This AC type PDP is a surface discharge type, and in order to selectively turn on the panel, for example, after applying an initial discharge by applying a pulse voltage between the composite electrodes on the front plate, the composite electrode and the addressing electrode Addressing is performed by applying a pulse voltage between and to turn on / off each cell. That is, a discharge occurs in a cell in which a voltage is applied between the composite electrode and the addressing electrode during addressing, and charges are accumulated on the dielectric layer and the protective layer. However, in a cell to which no voltage is applied, a charge is accumulated in the initial discharge. The charge is cancelled. Subsequently, when an AC voltage is applied between the composite electrodes, the discharge lighting is maintained in the cell in which the charge is accumulated, whereas the discharge is not generated in the cell in which the charge is canceled. In the light-on cell, the phosphor 10 emits light by the ultraviolet rays generated by this discharge, and the observer visually recognizes the light transmitted through the front plate.
[0005]
[Problems to be solved by the invention]
In the panel structure as described above, for example, as shown in the pattern diagram of FIG. 2, the application areas of the phosphors of RGB colors are generally in the same shape. In addition, since the phosphors of RGB colors are all white unless a special pigment is added, it is indistinguishable when inspecting the application shape of the phosphor and the defective portion. Visual recognition is possible if the RGB phosphors are colored, but the addition of a pigment means the inclusion of impurities, that is, it is not desirable because it reduces the luminous efficiency of the phosphor. Therefore, when the phosphor is not colored, in order to identify which phosphor line has which color, the phosphor lines are counted one by one from the end or identified from their coordinate positions. However, this method is a complicated procedure especially near the center of the substrate. Even if the phosphor is colored, the monochrome CCD camera mounted on the automatic inspection apparatus cannot identify the color. The reason why the CCD camera of the automatic inspection apparatus is monochrome is that the resolution is better than that of color. Alternatively, there is a method of inspecting while emitting light by applying UV light, but depending on the device, the fluorescent material may be excited by vacuum ultraviolet light, and such a fluorescent material cannot be emitted by the UV lamp.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a PDP that can easily identify which color each of the phosphors of RGB has with a simple configuration. It is in.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a phosphor that emits different colors in a PDP that displays an image by emitting light from a phosphor arranged so as to cover a wall surface and a cell bottom surface of a striped cell barrier. The pattern of at least one kind of phosphor has a shape different from the phosphors of other colors outside the effective area of image display for every predetermined number .
[0008]
The present invention also Oite the type of PD P for performing display image by the light emission of the manner arranged phosphors covering the wall and the cell bottom in the stripe-shaped cell barriers, phosphors that emit different colors, at least one pattern of cell barriers corresponding to the phosphor is characterized by having a pattern different from the shape of the cell barriers corresponding to other color phosphors in the effective area outside the image display for each predetermined number.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Here, a PDP substrate as described in the prior art is taken up, and an embodiment of the present invention will be described with an example.
[0010]
In the example shown in FIG. 3, only the pattern of the R phosphor 10 out of the RGB phosphors 10 has a different shape from the other phosphors 10 outside the effective area of image display. With this configuration, the R phosphor 10 can be easily recognized from the shape of the end of the phosphor pattern, and the G and B phosphors 10 can also be recognized based on the R phosphor 10. Can do.
[0011]
In the example shown in FIG. 4, the pattern of the phosphors 10 for each color of RGB is changed from the pattern of the other phosphors 10 outside the effective area of image display. In this case as well, the color can be recognized by the shape of the phosphor pattern end as in the case of FIG.
[0012]
In the example shown in FIG. 5, only the pattern of the R phosphor 10 out of the RGB phosphors 10 has a different shape from the other phosphors 10 every other pattern outside the effective area of image display. That is, if the pattern shape of the phosphor 10 is changed for each predetermined number of certain predetermined colors, the colors of the surrounding phosphors 10 can be recognized with reference to that shape.
[0014]
In the example shown in FIG. 6 , the pattern of the cell barrier 3 is changed from the pattern of the other cell barrier 3 every three lines outside the effective area of the image display. In this case, for example, if the pattern of the cell barrier 3 corresponding to the R phosphor 10 is partially changed, the same effect as that obtained when the end shape of the phosphor pattern is changed can be obtained. In FIG. 6, the shape of the cell barrier is changed every third line, but every third or ninth line may be a multiple of the number of colors. The cell barrier pattern is not limited to the shape shown in FIG.
[0015]
Phosphor as exemplified above, the pattern of cell Le barrier, when inspecting the phosphor, it is possible to identify the respective RGB color phosphor from the edge shape of the pattern, either the effect The same applies to the pattern .
[0016]
【The invention's effect】
As described above, according to the present invention, in a PDP that displays an image by light emission of phosphors arranged in a stripe pattern, the phosphor and cell barrier patterns are changed outside the effective area of image display. From the pattern, it is possible to easily identify which color each of the phosphors of RGB is, and even an inspection apparatus using a monochrome CCD camera can recognize the color.
[Brief description of the drawings]
FIG. 1 is a structural diagram showing a configuration example of an AC type plasma display panel with a front plate and a back plate separated from each other.
FIG. 2 is a plan view showing a part of a barrier and phosphor pattern formed on a substrate in the panel as shown in FIG. 1;
FIG. 3 is a plan view showing a part of a barrier and phosphor pattern in a plasma display panel substrate;
FIG. 4 is a plan view showing a part of a barrier and phosphor pattern in a plasma display panel substrate;
FIG. 5 is a plan view showing a part of a barrier and phosphor pattern in a plasma display panel substrate;
FIG. 6 is a plan view showing a part of a barrier and phosphor pattern in a plasma display panel substrate.
[Explanation of symbols]
1, 2 glass substrate 3 cell barrier 4 sustain electrode 5 bus electrode 6 composite electrode 7 dielectric layer 8 protective layer 9 addressing electrode 10 phosphor

Claims (2)

A pattern of at least one phosphor that emits different colors in a plasma display panel that displays an image by emitting light from a phosphor arranged so as to cover a wall surface and a cell bottom surface of a striped cell barrier. There PDP and having other color phosphors with different shapes in the effective area outside the image display for each predetermined number. Oite on the type of plasma display panel that performs image display by emitting the manner arranged phosphors covering the wall and the cell bottom in the stripe-shaped cell barrier, of at least one fluorescent phosphor emitting different colors PDP pattern of cell barriers corresponding to the body and having a pattern different from the shape of the cell barriers corresponding to other color phosphors in the effective area outside the image display for each predetermined number.

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