Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Reexamination Certificate
2003-03-05
2004-08-17
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
C313S584000, C313S586000
Reexamination Certificate
active
06777873
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a panel structure of a surface-discharge-type alternating-current plasma display panel.
The present application claims priority from Japanese Application No. 2002-60071, the disclosure of which is incorporated herein by reference.
2. Description of the Related Art
At the present time, surface-discharge-type AC plasma display panels (hereinafter referred to as “PDP”) have received attention as a large-sized flat color-screen display, and have increasingly become commonly used in ordinary homes.
A reflection-type PDP of a three electrode structure is well known as one kind of surface-discharge-type AC PDP.
The three-electrode reflection-type PDP includes a front glass substrate and a back glass substrate which are situated opposite each other with a discharge-gas-filled discharge space in between.
The front glass substrate has an inner surface on which a plurality of row electrode pairs and a dielectric layer covering the row electrode pairs are provided. The row electrode pair is constituted of paired row electrodes (discharge sustaining electrodes) extending in a row direction and arranged in parallel to each other to form a display line.
The back glass substrate has an inner surface on which a plurality of column electrodes (addressing electrodes) extend in the column direction.
A discharge cell (unit light emitting area) is formed at each intersection of the column electrode and the row electrode pair in the discharge space, and has a red-, green- or blue-colored phosphor layer formed therein.
In the three-electrode reflection-type PDP, first, an addressing discharge is selectively produced between one row electrode in the row electrode pair and the column electrode to form wall charges on the dielectric layer covering the row electrode pair or to erase the wall charges formed thereon.
As a result of the addressing discharge, the discharge cells in which the wall charges are generated on the dielectric layer (lighted cells) and the discharge cells in which no wall charges are generated on the dielectric layer (non-lighted cells) are distributed over the panel surface in accordance with an inputted video signal.
After that, a sustaining discharge is caused between the row electrodes of each row electrode pair in the lighted cells. The sustaining discharge causes radiation of vacuum ultraviolet light from a xenon gas included in the discharge gas. The vacuum ultraviolet light excites the red, green or blue phosphor layer formed in each lighted cell to allow the phosphor layer to emit light for the matrix display of an image.
The conventional configuration of the three-electrode reflection-type PDP as described above requires a complicated manufacturing process for forming the electrodes on both the front and back glass substrates, and also high precision for the positional relationship between the electrodes provided on the front and back glass substrates.
Such requirements give rise to the problem of an increase in manufacturing costs. The large number of components formed on each substrate has the disadvantage of further increasing the manufacturing costs.
In recent years, therefore, in order to reduce the cost and increase the high definition of the display image, a PDP having the row electrodes and the column electrodes formed on either the front or the back glass substrate has been suggested.
The PDP of the above type is designed such that the row electrode pair and the column electrode extending in the direction at right angles to the row electrode pair concerned are formed in a double layer construction with the dielectric layer interposed in between, on a glass substrate situated opposite another glass substrate having the phosphor layer formed thereon.
However, as compared with the case in which the row electrode pairs and the column electrodes are formed separately on the two facing glass substrates, the formation of the row electrode pairs and the column electrodes on the same single glass substrate leads to a decrease in a distance between the row electrode pair and the column electrode, and accordingly the capacitance arising from the intersection of the row electrode pair and the column electrode is much higher. The extremely high capacitance creates a bottleneck in the commercialization of the PDP having the row electrode pairs and the column electrodes formed on the same single glass substrate.
SUMMARY OF THE INVENTION
The present invention has been made to solve the problems associated with the three-electrode surface-discharge-type alternating-current plasma display panels as described above.
Accordingly, it is an object of the present invention to provide a plasma display panel having the form that row electrode pairs and column electrodes are formed on one or other of substrates, and capable of reducing capacitance arising from intersection of the row electrode pair and the column electrode for the sake of commercialization.
It is another object of the present invention to provide a plasma display panel having a reduced number of components for cost reduction.
To attain these objects, according to a first feature of the present invention, a plasma display panel including: a pair of first and second substrates opposite each other with a discharge space in between; a plurality of row electrode bodies provided on an inner surface of the first substrate, and each extending in a row direction and arranged at required intervals in a column direction; a plurality of row electrode jutting parts provided on the inner surface of the first substrate, and connected to each of the row electrode bodies at required intervals, and each protruding from the row electrode body in the column direction on both sides of the row electrode body; a plurality of column electrodes provided on the inner surface of the first substrate, and each separated from the row electrode body through a dielectric layer, covering the row electrode bodies and the row electrode jutting parts, in a thickness direction of the first substrate, and also disposed opposite a midpoint of the row electrode jutting parts adjacent to each other in the row direction, a leading end of each of the row electrode jutting parts being opposite a leading end of another row electrode jutting part, connected to the row electrode body adjacent thereto, with a first discharge gap interposed in between, one of the row electrode jutting parts facing and paired with each other being opposite the column electrode with a second discharge gap interposed in between; and phosphor layers each provided on a surface of the second substrate, facing the first substrate, and at a position opposite the paired row electrode jutting parts placed opposite each other with the first gap in between.
The plasma display panel according to the first feature has discharge cells formed within the discharge space defined between the two substrates, and each opposite the paired row electrode jutting parts opposite to each other with the first discharge gap in between.
In an addressing period after completion of a concurrent reset period, a scan pulse is applied to the row electrode bodies in sequence, and a display data pulse corresponding to display data of a video signal is applied to the column electrodes. An addressing discharge is then selectively produced in the second discharge gap between the column electrode and the row electrode jutting part which is connected to the row electrode body and opposite the column electrode concerned. As a result, the discharge cells in which wall charges are generated on the dielectric layers (lighted cells) and the discharge cells in which no wall charge is formed thereon (non-light cells) are distributed over the panel surface.
In the subsequent sustaining emission period, a discharge-sustaining pulse is applied to the row electrode bodies to cause a sustaining discharge between the row electrode jutting parts paired opposite to each other with the first discharge gap in between in each lighted cell.
The sustaining discharge al
Arent Fox
Pioneer Corporation
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