Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate
1999-02-01
2001-12-11
Rosenberger, Richard A. (Department: 2877)
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
C313S494000, C315S169400, C315S169100
Reexamination Certificate
active
06329749
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a planar type plasma discharge display device or a so-called two-electrode system planar type plasma discharge display device including first and second electrode groups to display a desired image by plasma discharge produced between predetermined electrodes of the two electrode groups.
DESCRIPTION OF THE RELATED ART
In general, as a planar type plasma discharge display device of a two-electrode system matrix display mode including first and second electrode groups in which a plurality of electrode elements called X electrodes and Y electrodes are arrayed to display a desired image by plasma discharge produced between selected electrodes of the two electrode groups, there is known a plasma panel which is disclosed in Japanese laid-open patent application No. 6-52802.
In this kind of planar type plasma discharge display device, a front plate and a back plate are sealed in an opposing relation so as to form a gas space between the front plate and the back plate.
A first electrode group and a light-emitting material, for example, are formed on the front plate side, and a second electrode group is formed on the back plate. The first and second electrode groups are formed of parallel electrodes, i.e. column electrodes and row electrodes in which a plurality of electrodes are arrayed with a predetermined interval in parallel to each other. Then, in the front plate, a light-emitting material is coated on both sides of each electrode of the first electrode group.
The parallel electrodes of the first and second electrode groups are made perpendicular to each other.
As described above, in the ordinary planar type plasma discharge display device, the first and second electrode groups are formed on the front plate and the back plate which are disposed in an opposing relation to each other, i.e. different plates. Accordingly, an accuracy at which a mutual positional relationship between the first and second electrode groups is set depends upon an accuracy at which each electrode group is formed on each plate and a mutual positional relationship required when the front plate and the back plate are bonded and sealed. There are then the problems that a high accuracy is difficult to obtain when a uniform interval is set and a positional relationship is set in each portion and that the planar type plasma discharge display device should be assembled with a special care.
Also, in this case, on the same plate, there is formed one electrode pattern, e.g. Y electrode on which there is formed a dielectric layer on which a fluorescent material is formed. In this case, to avoid the fluorescent material from being damaged by plasma, the fluorescent material is coated except the upper portion of Y electrode. Therefore, according to this arrangement, the coated area of the fluorescent material is small, and there is then the problem that it is difficult to display an image with a high light-emission brightness.
Further, when a color image is displayed according to this arrangement, since a work for coating a fluorescent pattern of each color is cumbersome, if the electrode pattern and the fluorescent pattern are formed on the same plate, there is then the problem that a work efficiency and a yield are lowered.
In a plasma discharge display device of a two-electrode system, i.e. so-called X-Y simple matrix system, as the number of pixels increases as the display device becomes increasingly high-definition, the number of electrodes, accordingly, the number of electrode terminals increases.
Then, if the number of electrode terminals increases as described above, there is then the problem that a reliability of the display device is lowered in accordance with the increase of the area of the portion in which these terminals are disposed or the reduction of the terminal width or when the terminals are disposed close to each other or the like.
In general, the number of pixels in the horizontal (row) direction is considerably large as compared with the number of pixels in the vertical (column) direction. Accordingly, in the case of the display device of the above-mentioned simple matrix system, the number of electrodes (hereinafter referred to as column electrodes or Y electrodes) extended along the vertical direction is considerably larger than the number of electrodes (hereinafter referred to as row electrodes or X electrodes) extended along the horizontal direction. That is, the number of electrode terminals concerning the scanning in the horizontal direction is considerably large as compared with the number of electrode terminals concerning the scanning in the vertical direction.
According to a monochromatic display device, for example, in a VGA (Video Graphic Array) display, while the number of row electrodes extended in the row direction is 480, the number of column electrodes extended in the column direction is 640.
Also, in a SVGA (Super Video Graphic Array) display, while the number of row electrodes extended in the row direction is 600, the number of column electrodes extended in the column direction is 800.
Then, in an XGA (Extended Graphic Array) display, while the number of row electrodes extended in the row direction is 768, the number of column electrodes extended in the column direction is 1024.
Also, in an SXGA (Super Extended Graphic Array) display, while the number of row electrodes extended in the row direction is 1024, the number of column electrodes extended in the column direction is 1280.
Also, in a UXGA (Ultra Extended Graphic Array) display, while the number of row electrodes extended in the row direction is 1200, the number of column electrodes extended in the column direction is 1600.
Then, in these array display methods, when a color image is displayed, a unit light-emission portion is composed of red, green and blue light-emission portions with the result that the number of column electrodes is multiplied by three in each method.
As described above, since the number of terminals concerning the scanning in the horizontal direction, i.e. the number of the terminals of the above-mentioned column electrodes in the high-definition type display device of an ordinary so-called matrix system is enormous, a reliability of the display device is lowered in accordance with the increase of the area of the portion in which the terminals of the column electrodes or the reduction of the terminal width or when the terminals are disposed close to each other.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a planar type plasma discharge display device including first and second electrode groups to display a desired image by plasma discharge produced between the first and second electrode groups with increased brightness and accuracy that can be easily manufactured.
Another object of the present invention is to solve the aforementioned problems.
That is, having noted that the number of the terminals of the column electrodes is considerably large as compared with the number of the terminals of the row electrodes in the ordinary display device, the number of terminals of the electrodes may be decreased by increasing the number of terminals of the row electrodes so that the number of terminals of both electrodes may be well-balanced, thereby making it possible to alleviate the dense column electrode terminals.
According to an aspect of the present invention, there is provided a planar type plasma discharge display device, in which a first electrode group and a second electrode group, each being composed of a plurality of electrode elements, are arrayed on a common substrate in a two-dimensional fashion. Then, a desired image is displayed by plasma discharge produced between predetermined electrode elements of the first and second electrode groups.
Also, in a planar type plasma discharge display device according to the present invention, a first electrode group and a second electrode group, each being composed of a plurality of electrode elements, are arrayed on a common substrate in a two-dimensional fashion, the electrode el
Mori Hiroshi
Nakamura Suehiro
Kananen Ronald P.
Lauchman Layla
Rader & Fishman & Grauer, PLLC
Rosenberger Richard A.
Sony Corporation
LandOfFree
Planar type plasma discharge display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Planar type plasma discharge display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planar type plasma discharge display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2600917