WO2012176421A1 - Plasma display device - Google Patents

Plasma display device Download PDF

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Publication number
WO2012176421A1
WO2012176421A1 PCT/JP2012/003952 JP2012003952W WO2012176421A1 WO 2012176421 A1 WO2012176421 A1 WO 2012176421A1 JP 2012003952 W JP2012003952 W JP 2012003952W WO 2012176421 A1 WO2012176421 A1 WO 2012176421A1
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WO
WIPO (PCT)
Prior art keywords
plasma display
electrode
display device
panel
gap
Prior art date
Application number
PCT/JP2012/003952
Other languages
French (fr)
Japanese (ja)
Inventor
宮崎　俊一
耕平 増田
柴田　修
岩井　浩
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2012176421A1 publication Critical patent/WO2012176421A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/22—Electrodes, e.g. special shape, material or configuration
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/298—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using surface discharge panels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Definitions

  • the present invention relates to a plasma display device using an AC surface discharge type plasma display panel.
  • a typical AC surface discharge type panel as a plasma display panel (hereinafter abbreviated as “panel”) has a large number of discharge cells formed between a front substrate and a rear substrate that are arranged to face each other.
  • a plurality of pairs of display electrodes composed of a pair of scan electrodes and sustain electrodes are formed in parallel with each other on the front glass substrate.
  • a dielectric layer and a protective layer are formed so as to cover the display electrode pairs.
  • the back substrate has a plurality of parallel data electrodes formed on the glass substrate on the back side, a dielectric layer is formed so as to cover the data electrodes, and a plurality of barrier ribs are formed thereon in parallel with the data electrodes. ing. And the fluorescent substance layer is formed in the surface of a dielectric material layer, and the side surface of a partition.
  • the front substrate and the rear substrate are arranged opposite to each other and sealed so that the display electrode pair and the data electrode are three-dimensionally crossed.
  • a discharge gas containing xenon is sealed in the sealed internal discharge space.
  • a discharge cell is formed at a portion where the display electrode pair and the data electrode face each other.
  • ultraviolet rays are generated by gas discharge in each discharge cell, and the phosphors of each color of red (R), green (G) and blue (B) are excited and emitted by the ultraviolet rays. Display an image.
  • the subfield method is generally used as a method for driving the panel.
  • one field is divided into a plurality of subfields having different emission luminances.
  • the subfield to emit light and the non-light-emitting subfield are combined according to the image signal.
  • each discharge cell is caused to emit light by combining binary control of light emission and non-light emission, gradations corresponding to image signals are displayed on each discharge cell, and the image display area of the panel is configured with various gradation combinations Displayed images.
  • each subfield has an initialization period, an address period, and a sustain period.
  • initialization discharge is generated in each discharge cell, and wall charges necessary for the subsequent address operation are formed on each electrode.
  • address discharge is selectively generated in the discharge cells that should emit light, and wall charges are formed in the discharge cells.
  • the number of sustain pulses based on the luminance weight determined for each subfield is alternately applied to the display electrode pairs composed of the scan electrodes and the sustain electrodes.
  • the discharge cell that has generated the address discharge is caused to emit light with a luminance corresponding to the luminance weight.
  • each discharge cell of the panel is caused to emit light with a luminance corresponding to the gradation value of the image signal, and an image is displayed in the image display area of the panel.
  • a technique is disclosed in which a transparent electromagnetic filter that suppresses unnecessary radiation is provided in front of a front substrate (see, for example, Patent Document 1).
  • Patent Document 2 also discloses a configuration in which the ground electrode is formed in a strip shape parallel to the data electrode.
  • the frequency of the driving waveform for driving the panel is higher than before.
  • the increase in the frequency of the drive waveform is also referred to as “acceleration of drive”.
  • acceleration of drive there is a tendency for unnecessary radiation particularly in the vicinity of 30 MHz and higher frequency bands to increase.
  • the present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted.
  • the plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, a plurality of conductive sheets are provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a gap parallel to the display electrode pair.
  • This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
  • a plurality of conductive sheets may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a single gap parallel to the display electrode pair.
  • the present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted.
  • the plasma display device includes a circuit board and a chassis that holds the panel and the circuit board.
  • at least four conductive layers are provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a gap parallel to the display electrode pair and a gap parallel to the data electrode provided in a cross shape.
  • a sheet may be provided.
  • This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
  • the present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted.
  • the plasma display device includes a circuit board and a chassis that holds the panel and the circuit board.
  • a conductive sheet having a gap parallel to the display electrode pair may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed.
  • This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
  • a single conductive sheet having a single gap parallel to the display electrode pair may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed.
  • the present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted.
  • the plasma display device includes a circuit board and a chassis that holds the panel and the circuit board.
  • one conductive sheet in which a gap parallel to the display electrode pair and a gap parallel to the data electrode are provided in a cross shape on the surface opposite to the surface on which the data electrode is formed on the rear substrate. May be provided.
  • This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
  • the present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted.
  • the plasma display device includes a circuit board and a chassis that holds the panel and the circuit board.
  • two conductive sheets having a gap parallel to the data electrodes are provided on the surface opposite to the surface on which the data electrodes are formed on the back substrate, and display is performed between the two conductive sheets.
  • a gap parallel to the electrode pair may be provided, and a cross-shaped gap may be provided by a gap parallel to the display electrode pair and a gap parallel to the data electrode.
  • This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
  • FIG. 1 is an exploded perspective view showing a structure of a panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 2 is an electrode array diagram of the panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 3 is a plan view schematically showing the appearance of the panel viewed from the front substrate side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 4 is a plan view schematically showing the appearance of the panel viewed from the back substrate side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 5 is an exploded perspective view showing the structure of the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 1 is an exploded perspective view showing a structure of a panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 2 is an electrode array diagram of the panel used in the plasma display device in accordance with the
  • FIG. 6 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of the unwanted radiation with respect to the vertical polarization in the plasma display device in accordance with the first exemplary embodiment.
  • FIG. 7 is a diagram showing another example of the arrangement position of the gasket of the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 8 is a diagram showing another example of the shape of the conductive sheet of the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 9 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • FIG. 10 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of unwanted radiation with respect to the horizontal polarization in the plasma display device according to the second exemplary embodiment of the present invention.
  • FIG. 11 is a plan view schematically showing the appearance of the panel viewed from the back substrate side in the plasma display device in accordance with the second exemplary embodiment of the present invention.
  • FIG. 12 is a diagram showing another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention.
  • FIG. 13 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention.
  • FIG. 14 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention.
  • FIG. 1 is an exploded perspective view showing the structure of panel 10 used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • a plurality of display electrode pairs 14 each including a scanning electrode 12 and a sustaining electrode 13 are formed on a glass front substrate 11.
  • a dielectric layer 15 is formed so as to cover the scan electrode 12 and the sustain electrode 13, and a protective layer 16 is formed on the dielectric layer 15.
  • the protective layer 16 is formed of a material mainly composed of magnesium oxide (MgO), which is a material having high electron emission performance, in order to easily generate discharge in the discharge cell.
  • MgO magnesium oxide
  • the protective layer 16 may be composed of a single layer or may be composed of a plurality of layers. Moreover, the structure which particle
  • a plurality of data electrodes 22 are formed on the rear substrate 21, a dielectric layer 23 is formed so as to cover the data electrodes 22, and a grid-like partition wall 24 is further formed thereon.
  • a phosphor layer 25 that emits light of each color of red (R), green (G), and blue (B) is provided on the side surface of the partition wall 24 and the dielectric layer 23.
  • the front substrate 11 and the rear substrate 21 are arranged to face each other so that the display electrode pair 14 and the data electrode 22 cross each other with a minute discharge space interposed therebetween, and a discharge space is formed in the gap between the front substrate 11 and the rear substrate 21.
  • the outer peripheral part is sealed with sealing materials, such as glass frit. Then, for example, a mixed gas of neon (Ne) and xenon (Xe) is sealed in the discharge space inside as a discharge gas.
  • the discharge space is partitioned into a plurality of sections by the barrier ribs 24, and discharge cells constituting pixels are formed at the intersections between the display electrode pairs 14 and the data electrodes 22.
  • a color image is displayed on the panel 10 by discharging and emitting (lighting) these discharge cells.
  • the panel 10 faces the front substrate 11 on which the plurality of display electrode pairs 14 are formed and the rear substrate 21 on which the plurality of data electrodes 22 are formed so that the display electrode pairs 14 and the data electrodes 22 cross each other. It is arranged and formed.
  • the structure of the panel 10 is not limited to the above-described structure, and may be, for example, provided with a stripe-shaped partition wall.
  • the mixing ratio of the discharge gas may be, for example, a xenon partial pressure of 10%, but the xenon partial pressure may be further increased in order to improve the light emission efficiency in the discharge cell. Good.
  • FIG. 2 is an electrode array diagram of panel 10 used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • the panel 10 includes n scan electrodes 12 and n sustain electrodes 13 extended in the horizontal direction (row direction, line direction), and m data electrodes extended in the vertical direction (column direction). 22 are arranged.
  • one discharge cell is formed in a region where the pair of scan electrodes 12 and sustain electrodes 13 and one data electrode 22 intersect.
  • m discharge cells are formed on one pair of display electrodes 14 and m / 3 pixels are formed.
  • m ⁇ n discharge cells are formed in the discharge space, and an area where m ⁇ n discharge cells are formed becomes an image display area of the panel 10.
  • n 1080, but the present invention is not limited to this value.
  • FIG. 3 is a plan view schematically showing the appearance of panel 10 as viewed from the front substrate 11 side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • the dimensions of the front substrate 11 are, for example, a short side length of 554 mm and a long side length of 980 mm, and the back substrate 21 has a short side length of, for example, 570 mm.
  • the length of the long side is 964 mm.
  • electrode lead portions 28 for the data electrodes 22 are formed on the lower side of the four sides of the back substrate 21 (the lower long side in FIG. 3).
  • the electrode lead portion 28 is connected to the corresponding data electrode 22.
  • the electrode lead portion 28 is divided into a plurality of blocks. Each block is connected to an FPC (Flexible Printed Circuits: not shown) equipped with an integrated circuit (IC) for driving the data electrode 22.
  • FPC Flexible Printed Circuits: not shown
  • IC integrated circuit
  • FIG. 4 is a plan view schematically showing the outer appearance of panel 10 as viewed from the back substrate 21 side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
  • An electrode lead-out portion 18 for the scanning electrode 12 is formed on the left side of the four sides of the front substrate 11 (the short side on the left side in FIG. 4).
  • the electrode lead-out portions 18 are connected to the corresponding scanning electrodes 12 respectively.
  • An electrode lead-out portion 19 for the sustain electrode 13 is formed on the right side of the four sides of the front substrate 11 (the short side on the right side in FIG. 4). Each of the electrode lead portions 19 is connected to n sustain electrodes 13.
  • Electrode lead-out portions 18 and 19 are also divided into a plurality of blocks. Each block is connected to an FPC for scan electrode 12 and an FPC for sustain electrode 13 (both not shown).
  • the panel 10 has a back electrode 31.
  • the back electrode 31 functions as a ground electrode.
  • the back electrode 31 is formed of a plurality of conductive sheets attached to the surface of the back substrate 21 opposite to the surface on which the data electrodes 22 are formed.
  • two aluminum sheets 31a and 31b are used as conductive sheets.
  • the aluminum sheets 31a and 31b have a structure in which an adhesive layer is provided on one surface of an aluminum foil formed in a sheet shape.
  • the dimensions of the aluminum sheets 31a and 31b are 235 mm in length, 895 mm in width, and 100 ⁇ m in thickness.
  • the aluminum sheet 31a is attached to a position corresponding to the upper half of the image display area, and the aluminum sheet 31b is attached to a position corresponding to the lower half of the image display area to form the back electrode 31.
  • the two aluminum sheets 31a and 31b are attached to the back substrate 21 so as not to be in direct contact with each other.
  • a gap 61 (gap extending in the horizontal direction in FIG. 4) parallel to the display electrode pair 14 is provided between the aluminum sheet 31 a and the aluminum sheet 31 b and is attached to the back substrate 21.
  • the width of the gap 61 is about 15 mm, for example.
  • the back electrode 31 in the present embodiment is a single gap provided on the surface of the back substrate 21 opposite to the surface on which the data electrode 22 is formed so as to be parallel to the display electrode pair 14. It is formed of two conductive aluminum sheets 31 a and 31 b that are pasted with 61 therebetween.
  • the gap 61 formed between the aluminum sheets 31a and 31b is a single line extending in the horizontal direction at substantially the center of the back substrate 21.
  • a double-sided adhesive tape 41 is affixed around the back electrode 31 of the back substrate 21 at a position that does not overlap the back electrode 31.
  • the double-sided adhesive tape 41 is provided to hold the panel 10 in a chassis described later. That is, the panel 10 is held on the chassis by the double-sided adhesive tape 41.
  • the double-sided adhesive tape 41 used in the present embodiment is an acrylic resin tape having a width of 20 mm and a thickness of 1 mm.
  • the double-sided adhesive tape 41 is not limited to the above-described dimensions and materials, but the thickness of the double-sided adhesive tape 41 is desirably sufficiently larger than the thickness of the back electrode 31.
  • the dimensions of the aluminum sheets 31a and 31b forming the back electrode 31 and the width of the gap 61 between the aluminum sheets 31a and 31b are not limited to the numerical values described above. These numerical values are desirably set optimally according to the dimensions of the panel 10 and the dimensions of the image display area.
  • the aluminum sheets 31a and 31b have the same size as each other, but they may not be exactly the same, and some dimensional differences are allowed.
  • the thicknesses of the aluminum sheets 31a and 31b are not limited to the above-described numerical values. However, in consideration of the degree of thermal conductivity, workability when a sheet is attached at the time of manufacture, etc., it is desirable to set in the range of about 50 ⁇ m to 200 ⁇ m.
  • the conductive sheet is not limited to the aluminum sheet.
  • the conductive sheet may be a material having high conductivity and high thermal conductivity.
  • a copper foil sheet or the like can be used as the conductive sheet.
  • FIG. 5 is an exploded perspective view showing the structure of the plasma display device 50 according to the first embodiment of the present invention.
  • the plasma display device 50 includes a panel 10 to which an FPC 45 is attached, a gasket 43, a chassis 51, a circuit board 53, a front frame 54 for storing them, and a back cover 55.
  • the panel 10 is held on the chassis 51 by a double-sided adhesive tape 41 affixed around the back electrode 31.
  • the gasket 43 is an elastic body having conductivity, and has a configuration in which a foamed sponge body of urethane is covered with a metal net.
  • the back electrode 31 is electrically connected to the chassis 51 via the gasket 43.
  • the gasket 43 was affixed to two locations, the upper right position and the upper left position of the aluminum sheet 31 a affixed to the upper half of the back substrate 21, and the lower half of the back substrate 21.
  • the aluminum sheet 31b is disposed at a total of four locations including a lower right position and a lower left position.
  • the aluminum sheets 31a and 31b have high thermal conductivity, the aluminum sheets 31a and 31b also function as a heat radiating plate and radiate heat generated in the panel 10 to the chassis 51.
  • the panel 10 and the chassis 51 are bonded with a double-sided adhesive tape 41 having a thickness of 1 mm.
  • the thickness of the aluminum sheets 31a and 31b is about 0.1 mm. Therefore, the gasket 43 is sandwiched between the back electrode 31 (aluminum sheets 31a and 31b) and the chassis 51 in a compressed state of about 0.9 mm. Thus, the back electrode 31 and the chassis 51 are electrically connected.
  • a gap of about 0.9 mm is formed between the back electrode 31 and the chassis 51.
  • the entire back surface of the panel 10 is not closely attached to the chassis 51 by the heat conductive sheet, but the panel 10 is attached to the chassis using the double-sided adhesive tape 41 attached around the back electrode 31. 51. Therefore, a gap exists between the chassis 51 and most of the back surface of the panel 10 excluding the gasket 43 and the double-sided adhesive tape 41.
  • what electrically connects the back electrode 31 and the chassis 51 is not limited to the gasket 43 mentioned above at all. Any material other than the gasket 43 may be used as long as it electrically connects the back electrode 31 and the chassis 51.
  • a conductive spring, steel wool, conductive tape, or the like may be used instead of the gasket 43.
  • FIG. in order to ensure electrical connection between the back electrode 31 and the chassis 51, it is desirable to provide two or more electrical connection points between the back electrode 31 and the chassis 51 per aluminum sheet.
  • the circuit board 53 includes a plurality of circuit boards on which various drive circuits for driving the panel 10 are mounted.
  • the circuit board 53 is attached to the surface of the chassis 51 opposite to the surface holding the panel 10.
  • the chassis 51 is formed by drawing a steel sheet having a thickness of 0.8 mm (processing performed by pressing the steel sheet on a mold). The chassis 51 holds the panel 10 and the circuit board 53.
  • the back electrode 31 is composed of two aluminum sheets 31a and 31b attached to the position corresponding to the upper half of the image display area and the position corresponding to the lower half of the image display area will be described. To do.
  • the inventors of the present application performed the following measurement for unnecessary radiation.
  • the inventors of the present application have found that the number of divisions of the back electrode 31 greatly affects the intensity of unnecessary radiation.
  • FIG. 6 is a diagram showing a relationship between the number of divisions of the back electrode 31 and the intensity of the unwanted radiation with respect to the vertical polarization in the plasma display device 50 according to the first embodiment of the present invention.
  • the vertical axis indicates the radiation intensity (measured at 110 MHz) with respect to the vertical polarization of unwanted radiation
  • the horizontal axis indicates the number of divisions in the vertical direction of the back electrode 31.
  • the vertically polarized wave component of unnecessary radiation is lower by providing the back electrode 31 (no division) than when the back electrode 31 is not provided (data when the back electrode 31 is not provided is not shown). Then, as shown in FIG. 6, by dividing the back electrode 31 vertically into two, unnecessary radiation is about 17 (dB ⁇ V / m) as compared with the case where the back electrode 31 (no division) is formed with a single aluminum sheet. ) Confirmed to decrease.
  • the inventors of the present application confirmed that, even if the number of divisions of the back electrode 31 is greater than 2, the intensity of unnecessary radiation does not decrease but increases.
  • the back electrode 31 is composed of two aluminum sheets 31a and 31b, and the two aluminum sheets 31a and 31b are positioned at a position corresponding to the upper half of the image display area on the back substrate 21 and below the image display area. If it is attached to each of the positions corresponding to half, the intensity related to the vertical polarization of unwanted radiation is the lowest.
  • Dividing the back electrode 31 changes the vertical path of the discharge current (current generated in the back electrode 31 by the discharge generated in the discharge cell). For this reason, it is considered that the frequency of resonance generated on the path of the discharge current is changed, and the frequency of unnecessary radiation due to resonance is changed. Further, by dividing the back electrode 31, the resonance (flat plate resonance) caused by the dimensions (vertical and horizontal sizes) of the aluminum sheet also changes. For this reason, it is considered that the frequency of the unwanted radiation due to the plate resonance is also changing.
  • the four gaskets 43 are arranged on the inner side of the outer peripheral end portions of the aluminum sheets 31 a and 31 b.
  • the arrangement position of the gasket 43 is not limited to this position.
  • FIG. 7 is a diagram showing another example of the arrangement position of the gasket 43 of the plasma display device 50 according to Embodiment 1 of the present invention.
  • the gasket 43 may be disposed at a position where a part of the gasket 43 protrudes from the outer peripheral ends of the aluminum sheets 31 a and 31 b. In this configuration, the end portions of the aluminum sheets 31 a and 31 b are pressed by the gasket 43. Therefore, peeling of the aluminum sheets 31a and 31b can be prevented.
  • the configuration in which one gap 61 parallel to the display electrode pair 14 is provided by two conductive sheets (aluminum sheets 31a and 31b) has been described.
  • the number of conductive sheets to be performed is not limited to two.
  • the back electrode 31 may be constituted by three or more conductive sheets.
  • FIG. 8 is a diagram showing another example of the shape of the conductive sheet of the plasma display device 50 according to the first exemplary embodiment of the present invention.
  • FIG. 9 is a diagram showing still another example of the shape of the conductive sheet of plasma display device 50 according to the first exemplary embodiment of the present invention.
  • one piece of conductive sheet in which a part of the conductive sheet is cut out to form a gap 63 parallel to the display electrode pair 14 (a gap having substantially the same shape as the gap 61 shown in FIG. 4).
  • the back electrode 31 may be configured by the sheet 31g.
  • a cut along the shape of one gap 63 is put in the conductive sheet 31 g in advance, the conductive sheet 31 g is attached to the back substrate 21, and then the conductive sheet is cut along the cut.
  • One gap 63 parallel to the display electrode pair 14 can be provided by peeling off a part of 31 g. Thereby, the efficiency at the time of manufacturing the plasma display apparatus 50 can be achieved.
  • the inventors of the present application provide a sample (non-divided sample) in which a back electrode is configured by attaching one aluminum sheet to an area corresponding to the image display area of the back substrate 21 (almost the entire surface of the back substrate 21), and data
  • a sample (N-divided sample) in which a back electrode was formed by pasting an aluminum sheet divided into N strips (N 2, 4, 8,...) In parallel with the electrode 22 onto the back substrate 21 was prepared. . And the intensity
  • the inventors of the present application have found that the number of divisions of the back electrode has a great influence on the intensity of the horizontally polarized component of unwanted radiation.
  • FIG. 10 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of unwanted radiation with respect to horizontal polarization in the plasma display device 50 according to Embodiment 2 of the present invention.
  • the vertical axis indicates the radiation intensity (measured at 70 MHz) with respect to the horizontal polarization of unwanted radiation
  • the horizontal axis indicates the number of divisions of the back electrode in the left-right direction.
  • the horizontal polarization component of unnecessary radiation is lower by providing the back electrode (no division) than when the back electrode is not provided (data when the back electrode is not provided is not shown). Then, as shown in FIG. 10, by dividing the back electrode into left and right parts, unnecessary radiation is reduced by about 10 (dB ⁇ V / m) compared to the case where the back electrode (no division) is configured with one aluminum sheet. Confirmed to do.
  • the inventors of the present application have confirmed that even if the number of divisions of the back electrode is larger than 2, the intensity of unnecessary radiation does not decrease but increases.
  • the back electrode is composed of two aluminum sheets, and each of the two aluminum sheets has a position corresponding to the left half of the image display area on the back substrate 21 and a position corresponding to the right half of the image display area. If it is pasted on, the intensity related to the horizontal polarization of unwanted radiation is the lowest.
  • the horizontal path of the discharge current (current generated in the back electrode by the discharge generated in the discharge cell) changes. For this reason, it is considered that the frequency of resonance generated on the path of the discharge current is changed, and the frequency of unnecessary radiation due to resonance is changed.
  • resonance flat plate resonance caused by the dimensions (vertical and horizontal sizes) of the aluminum sheet also changes. For this reason, it is considered that the frequency of the unwanted radiation due to the plate resonance is also changing.
  • the back electrode in order to suppress both the horizontally polarized wave component and the vertically polarized wave component of unwanted radiation, the back electrode should be divided into two parts in the vertical direction and further divided into four parts in the left and right direction. I understand.
  • FIG. 11 is a plan view schematically showing the appearance of panel 10 as viewed from the back substrate 21 side in plasma display device 50 according to the second exemplary embodiment of the present invention.
  • the panel 10 has a back electrode 33.
  • the back electrode 33 is formed of a plurality of conductive sheets attached to the surface of the back substrate 21 opposite to the surface on which the data electrode 22 is formed.
  • Embodiment 2 four aluminum sheets 33a, 33b, 33c, and 33d are used as the conductive sheets.
  • the aluminum sheets 33a, 33b, 33c, and 33d have a structure in which an adhesive layer is provided on one surface of an aluminum foil formed in a sheet shape.
  • the dimensions of the aluminum sheets 33a, 33b, 33c, and 33d are 235 mm in length, 440 mm in width, and 100 ⁇ m in thickness.
  • the image display area is divided into two parts, upper and lower, and left and right, and divided into four parts, upper left, upper right, lower left, and lower right. Then, an aluminum sheet 33a is attached to a position corresponding to the upper left of the image display area, an aluminum sheet 33b is attached to a position corresponding to the upper right of the image display area, and an aluminum sheet 33c is attached to a position corresponding to the lower left of the image display area.
  • the back electrode 33 is formed by pasting the aluminum sheet 33d at a position corresponding to the lower right of the image display area.
  • the four aluminum sheets 33a, 33b, 33c, and 33d are attached to the back substrate 21 so as not to be in direct contact with each other.
  • one gap parallel to the display electrode pair 14 (a gap extending in the horizontal direction in FIG. 11) between the aluminum sheet 33a and the aluminum sheet 33c and between the aluminum sheet 33b and the aluminum sheet 33d. ) And affixed to the back substrate 21.
  • the width of this gap is about 15 mm, for example.
  • a single gap parallel to the data electrode 22 (a gap extending in the vertical direction in FIG. 11) is provided between the aluminum sheet 33a and the aluminum sheet 33b and between the aluminum sheet 33c and the aluminum sheet 33d. Affixed to the back substrate 21.
  • the width of this gap is about 15 mm, for example.
  • the back electrode 33 has the gap provided on the surface opposite to the surface on which the data electrode 22 is formed on the back substrate 21 so as to be parallel to the display electrode pair 14 and the data. It is formed of four conductive aluminum sheets 33a, 33b, 33c, and 33d that are pasted with a gap provided so as to be parallel to the electrode 22.
  • the gap formed between the aluminum sheets 33 a, 33 b, 33 c, and 33 d in the second embodiment is a cross-shaped gap 64 that intersects at almost the center of the back substrate 21.
  • a double-sided adhesive tape 41 is affixed around the back electrode 33 of the back substrate 21 at a position that does not overlap the back electrode 33, as in the first embodiment.
  • the panel 10 is held by the chassis 51 by the double-sided adhesive tape 41. Since this double-sided adhesive tape 41 is the same as the double-sided adhesive tape 41 described in the first embodiment, the description thereof is omitted.
  • the position where the gasket 43 contacts the back electrode 33 is indicated by a broken line.
  • the back electrode 33 is electrically connected to the chassis 51 by the gasket 43. Since the gasket 43 is the same as the gasket 43 described in the first embodiment, the description thereof is omitted.
  • the gasket 43 has two locations, the left end of the aluminum sheet 33 a attached to the upper left of the back substrate 21 and the right end of the aluminum sheet 33 b attached to the upper right of the back substrate 21. And two places at the left end of the aluminum sheet 33c attached to the lower left of the back substrate 21 and two places at the right end of the aluminum sheet 33d attached to the lower right of the rear substrate 21. Yes.
  • the gasket 43 is sandwiched between the back electrode 33 (aluminum sheets 33a, 33b, 33c, and 33d) and the chassis 51 in a compressed state of about 0.9 mm. .
  • the back electrode 33 and the chassis 51 are electrically connected.
  • the back electrode 33 is made of four aluminum sheets 33a, 33b, 33c, and 33d as shown in FIG.
  • the aluminum sheets 33a, 33b, 33c, and 33d are attached to the back substrate 21 so that a cross-shaped gap 64 that is configured and intersects at substantially the center of the back substrate 21 is formed between the aluminum sheets 33a, 33b, 33c, and 33d. You can attach it.
  • a cross-shaped gap 64 (1 parallel to the display electrode pair 14) intersecting at almost the center of the back substrate 21 by four conductive sheets (aluminum sheets 33 a, 33 b, 33 c, 33 d).
  • the gap 64 and the gap 64 including one gap parallel to the data electrode 22 have been described.
  • the number of conductive sheets constituting the back electrode 33 is limited to four. is not. If one gap parallel to the display electrode pair 14 and one gap parallel to the data electrode 22 are provided, and a cross-shaped gap intersecting at the approximate center of the back substrate 21 can be provided, five or more
  • the back electrode 33 may be formed of the conductive sheet.
  • FIG. 12 is a diagram showing another example of the shape of the conductive sheet of the plasma display device 50 according to the second embodiment of the present invention.
  • FIG. 13 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device 50 in the second exemplary embodiment of the present invention.
  • FIG. 14 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device 50 according to the second embodiment of the present invention.
  • aluminum sheets 33e and 33f that are half the size of the aluminum sheet 33a are attached to the back substrate 21 in a state of being in direct contact with each other.
  • the aluminum sheets 33g and 33h, which are half the size of the aluminum sheet 33b, are attached to the back substrate 21 in direct contact with each other, and the aluminum sheets 33i and 33j that are half the size of the aluminum sheet 33c are directly attached to each other.
  • a cross-shaped gap 65 (see FIG. Gap and may be provided substantially the same shape of the gap) shown in 1.
  • a part of the conductive sheet is cut out in a cross shape, and a cross-shaped gap 66 (shown in FIG. 11) composed of a gap parallel to the display electrode pair 14 and a gap parallel to the data electrode 22.
  • the back electrode 33 may be constituted by a single conductive sheet 33m having a gap substantially the same shape as the gap.
  • a cut along the cross-shaped gap 66 is previously made in the aluminum sheet 33m, and after the aluminum sheet 33m is attached to the back substrate 21, a part of the aluminum sheet 33m is cut along the cut.
  • a cross-shaped gap 66 that intersects at almost the center of the back substrate 21 can be provided. Thereby, the efficiency at the time of manufacturing the plasma display apparatus 50 can be achieved.
  • two aluminum sheets 33 n and 33 o that are partially cut out to form a gap parallel to the data electrode 22 are replaced by one parallel to the display electrode pair 14 between the aluminum sheets 33 n and 33 o.
  • the back electrode 33 may be formed by providing a gap between the books and attaching it to the back substrate 21. Also with this configuration, one gap parallel to the display electrode pair 14 and one gap parallel to the data electrode 22 intersect at almost the center of the back substrate 21 to form a cross shape 67 (shown in FIG. 11). A gap having substantially the same shape as the gap) can be provided.
  • FIG. 14 similarly to the configuration shown in FIG.
  • the gap is parallel to the display electrode pair 14 (horizontal direction in the drawing), and the gap is parallel to the data electrode 22 (vertical direction in the drawing).
  • the present invention is not limited to “parallel” and “vertical” in the strict sense of “parallel” and “vertical”. “Parallel” and “vertical” mean substantially parallel and substantially vertical, and deviation, distortion, error, and the like are allowed within a range in which the intended effect of the present invention can be obtained.
  • one pixel is constituted by discharge cells of three colors of red, green, and blue.
  • a panel in which one pixel is constituted by discharge cells of four colors or more has been described.
  • the specific numerical values shown in the embodiment of the present invention are set based on the characteristics of the panel 10 having a screen size of 42 inches and the number of display electrode pairs 14 of 1024. It is just an example.
  • the present invention is not limited to these numerical values, and each numerical value is desirably set optimally in accordance with panel specifications, panel characteristics, plasma display device specifications, and the like. Each of these numerical values is allowed to vary within a range where the above-described effect can be obtained.
  • the present invention is useful as a plasma display device because it can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in a plasma display device using a panel having a large size and high image quality. is there.

Abstract

In this plasma display device, electromagnetic waves generated from a plasma display panel are suppressed. In order to suppress the electromagnetic waves, the plasma display device is provided with: the plasma display panel; a circuit board having mounted thereon a drive circuit for driving the plasma display panel; and a chassis that holds the plasma display panel and the circuit board. On a rear substrate (21) surface on the reverse side of a rear substrate surface having a data electrode formed thereon, a plurality of conducting sheets (31a, 31b) are provided at an interval (61) parallel to a display electrode pair.

Description

プラズマディスプレイ装置Plasma display device
　本発明は、交流面放電型のプラズマディスプレイパネルを用いたプラズマディスプレイ装置に関する。 The present invention relates to a plasma display device using an AC surface discharge type plasma display panel.
　プラズマディスプレイパネル（以下、「パネル」と略記する）として代表的な交流面放電型パネルは、対向配置された前面基板と背面基板との間に多数の放電セルが形成されている。 2. Description of the Related Art A typical AC surface discharge type panel as a plasma display panel (hereinafter abbreviated as “panel”) has a large number of discharge cells formed between a front substrate and a rear substrate that are arranged to face each other.
　前面基板は、１対の走査電極と維持電極とからなる表示電極対が前面側のガラス基板上に互いに平行に複数対形成されている。そして、それら表示電極対を覆うように誘電体層および保護層が形成されている。 In the front substrate, a plurality of pairs of display electrodes composed of a pair of scan electrodes and sustain electrodes are formed in parallel with each other on the front glass substrate. A dielectric layer and a protective layer are formed so as to cover the display electrode pairs.
　背面基板は、背面側のガラス基板上に複数の平行なデータ電極が形成され、それらデータ電極を覆うように誘電体層が形成され、さらにその上にデータ電極と平行に複数の隔壁が形成されている。そして、誘電体層の表面と隔壁の側面とに蛍光体層が形成されている。 The back substrate has a plurality of parallel data electrodes formed on the glass substrate on the back side, a dielectric layer is formed so as to cover the data electrodes, and a plurality of barrier ribs are formed thereon in parallel with the data electrodes. ing. And the fluorescent substance layer is formed in the surface of a dielectric material layer, and the side surface of a partition.
　そして、表示電極対とデータ電極とが立体交差するように、前面基板と背面基板とを対向配置して密封する。密封された内部の放電空間には、キセノンを含む放電ガスを封入する。そして、表示電極対とデータ電極とが対向する部分に放電セルが形成される。このような構成のパネルにおいて、各放電セル内でガス放電により紫外線を発生し、この紫外線で赤色（Ｒ）、緑色（Ｇ）および青色（Ｂ）の各色の蛍光体を励起発光してカラーの画像表示を行う。 Then, the front substrate and the rear substrate are arranged opposite to each other and sealed so that the display electrode pair and the data electrode are three-dimensionally crossed. A discharge gas containing xenon is sealed in the sealed internal discharge space. A discharge cell is formed at a portion where the display electrode pair and the data electrode face each other. In the panel having such a configuration, ultraviolet rays are generated by gas discharge in each discharge cell, and the phosphors of each color of red (R), green (G) and blue (B) are excited and emitted by the ultraviolet rays. Display an image.
　パネルを駆動する方法としては、一般にサブフィールド法が用いられている。 The subfield method is generally used as a method for driving the panel.
　サブフィールド法では、１フィールドを、発光輝度が互いに異なる複数のサブフィールドに分割する。そして、各放電セルにおいて、発光させるサブフィールドと非発光のサブフィールドとを画像信号に応じて組み合わせる。こうして、各放電セルを発光と非発光との２値制御を組み合わせて発光させ、各放電セルに画像信号に応じた階調を表示し、パネルの画像表示領域に様々な階調の組合せで構成された画像を表示する。 In the subfield method, one field is divided into a plurality of subfields having different emission luminances. In each discharge cell, the subfield to emit light and the non-light-emitting subfield are combined according to the image signal. In this way, each discharge cell is caused to emit light by combining binary control of light emission and non-light emission, gradations corresponding to image signals are displayed on each discharge cell, and the image display area of the panel is configured with various gradation combinations Displayed images.
　サブフィールド法において、各サブフィールドは、初期化期間、書込み期間および維持期間を有する。 In the subfield method, each subfield has an initialization period, an address period, and a sustain period.
　初期化期間では、各放電セルで初期化放電を発生し、続く書込み動作に必要な壁電荷を各電極上に形成する。 In the initialization period, initialization discharge is generated in each discharge cell, and wall charges necessary for the subsequent address operation are formed on each electrode.
　書込み期間では、発光を行うべき放電セルで選択的に書込み放電を発生し、その放電セル内に壁電荷を形成する。 In the address period, address discharge is selectively generated in the discharge cells that should emit light, and wall charges are formed in the discharge cells.
　維持期間では、サブフィールド毎に定められた輝度重みにもとづく数の維持パルスを走査電極と維持電極とからなる表示電極対に交互に印加する。これにより、書込み放電を発生した放電セルを、輝度重みに応じた輝度で発光させる。このようにして、パネルの各放電セルを画像信号の階調値に応じた輝度で発光させて、パネルの画像表示領域に画像を表示する。 In the sustain period, the number of sustain pulses based on the luminance weight determined for each subfield is alternately applied to the display electrode pairs composed of the scan electrodes and the sustain electrodes. As a result, the discharge cell that has generated the address discharge is caused to emit light with a luminance corresponding to the luminance weight. In this way, each discharge cell of the panel is caused to emit light with a luminance corresponding to the gradation value of the image signal, and an image is displayed in the image display area of the panel.
　一般に、書込み放電や維持放電が発生すると、それにともない電磁波が発生する。そして、この電磁波が強く発生すると、他の電子機器に電磁的な影響を及ぼすことがある。そのため、このような電磁波を不要輻射とも呼ぶ。 Generally, when address discharge or sustain discharge occurs, electromagnetic waves are generated accordingly. And if this electromagnetic wave generate | occur | produces strongly, it may have an electromagnetic influence on another electronic device. Therefore, such an electromagnetic wave is also called unnecessary radiation.
　不要輻射が他の電子機器に与える悪影響を防ぐため、電子機器から放出することが許される不要輻射の上限が法的に規制されている。 In order to prevent the adverse effects of unwanted radiation on other electronic devices, the upper limit of unwanted radiation allowed to be emitted from electronic devices is legally regulated.
　そして、不要輻射をこの上限以下に抑えるための様々な提案がなされている。 And various proposals have been made to keep unnecessary radiation below this upper limit.
　例えば、プラズマディスプレイ装置において、不要輻射を抑制する透明な電磁フィルタを前面基板の前に設ける技術が開示されている（例えば、特許文献１参照）。 For example, in a plasma display device, a technique is disclosed in which a transparent electromagnetic filter that suppresses unnecessary radiation is provided in front of a front substrate (see, for example, Patent Document 1).
　また、プラズマディスプレイ装置の背面基板において、データ電極の形成面と反対の面にグランド電極を形成することで、パネルから発生する電磁波を抑制し、電磁フィルタを不要とする技術が開示されている（例えば、特許文献２参照）。そして、特許文献２には、グランド電極を、データ電極と平行な短冊状の形状に形成する構成も開示されている。 In addition, a technology is disclosed in which a ground electrode is formed on a surface opposite to a data electrode formation surface on the rear substrate of the plasma display device, thereby suppressing electromagnetic waves generated from the panel and eliminating the need for an electromagnetic filter ( For example, see Patent Document 2). Patent Document 2 also discloses a configuration in which the ground electrode is formed in a strip shape parallel to the data electrode.
　しかしながら、近年のプラズマディスプレイ装置においては、パネルの大型化、高画質化にともない、パネルを駆動するための電力が増加して不要輻射も増加する傾向にある。 However, in recent plasma display devices, with an increase in panel size and image quality, power for driving the panel increases and unnecessary radiation tends to increase.
　また、近年のプラズマディスプレイ装置においては、高画質化、高機能化にともない、パネルを駆動する駆動波形の周波数が以前よりも高くなっている。以下、駆動波形の周波数が高くなることを「駆動の高速化」とも記す。そして、駆動の高速化により、特に３０ＭＨｚ付近およびそれ以上の高い周波数帯の不要輻射が増加する傾向にある。 Also, in recent plasma display devices, with higher image quality and higher functionality, the frequency of the driving waveform for driving the panel is higher than before. Hereinafter, the increase in the frequency of the drive waveform is also referred to as “acceleration of drive”. And with the increase in driving speed, there is a tendency for unnecessary radiation particularly in the vicinity of 30 MHz and higher frequency bands to increase.
　そのため、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置において、パネルから発生する電磁波を効果的に抑制することが求められている。 Therefore, in a plasma display device using a panel having a large size and high image quality, it is required to effectively suppress electromagnetic waves generated from the panel.
実開昭５９－６３９５６号公報Japanese Utility Model Publication No.59-63958 特開２０００－８９６９２号公報JP 2000-89692 A
　本発明は、複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを表示電極対とデータ電極とが交差するように対向配置したパネルと、パネルを駆動する駆動回路を搭載した回路基板と、パネルおよび回路基板を保持するシャーシとを備えたプラズマディスプレイ装置である。このプラズマディスプレイ装置において、背面基板におけるデータ電極を形成した面とは反対側の面に、前記表示電極対に平行な間隙を設けて複数の導電性シートを設ける。 The present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted. The plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, a plurality of conductive sheets are provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a gap parallel to the display electrode pair.
　この構成により、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができる。 This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
　また、背面基板におけるデータ電極を形成した面とは反対側の面に、表示電極対に平行な１本の間隙を設けて複数の導電性シートを設けてもよい。 Also, a plurality of conductive sheets may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a single gap parallel to the display electrode pair.
　本発明は、複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを表示電極対とデータ電極とが交差するように対向配置したパネルと、パネルを駆動する駆動回路を搭載した回路基板と、パネルおよび回路基板を保持するシャーシとを備えたプラズマディスプレイ装置である。このプラズマディスプレイ装置において、背面基板におけるデータ電極を形成した面とは反対側の面に、表示電極対に平行な間隙とデータ電極に平行な間隙とを十字状に設けて少なくとも４枚の導電性シートを設けてもよい。 The present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted. The plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, at least four conductive layers are provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a gap parallel to the display electrode pair and a gap parallel to the data electrode provided in a cross shape. A sheet may be provided.
　この構成により、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができる。 This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
　本発明は、複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを表示電極対とデータ電極とが交差するように対向配置したパネルと、パネルを駆動する駆動回路を搭載した回路基板と、パネルおよび回路基板を保持するシャーシとを備えたプラズマディスプレイ装置である。このプラズマディスプレイ装置において、背面基板におけるデータ電極を形成した面とは反対側の面に、表示電極対に平行な間隙を形成した１枚の導電性シートを設けてもよい。 The present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted. The plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, a conductive sheet having a gap parallel to the display electrode pair may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed.
　この構成により、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができる。 This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
　また、背面基板におけるデータ電極を形成した面とは反対側の面に、表示電極対に平行な１本の間隙を設けた１枚の導電性シートを設けてもよい。 Further, a single conductive sheet having a single gap parallel to the display electrode pair may be provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed.
　本発明は、複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを表示電極対とデータ電極とが交差するように対向配置したパネルと、パネルを駆動する駆動回路を搭載した回路基板と、パネルおよび回路基板を保持するシャーシとを備えたプラズマディスプレイ装置である。このプラズマディスプレイ装置において、背面基板におけるデータ電極を形成した面とは反対側の面に、表示電極対に平行な間隙とデータ電極に平行な間隙とを十字状に設けた１枚の導電性シートを設けてもよい。 The present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted. The plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, one conductive sheet in which a gap parallel to the display electrode pair and a gap parallel to the data electrode are provided in a cross shape on the surface opposite to the surface on which the data electrode is formed on the rear substrate. May be provided.
　この構成により、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができる。 This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
　本発明は、複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを表示電極対とデータ電極とが交差するように対向配置したパネルと、パネルを駆動する駆動回路を搭載した回路基板と、パネルおよび回路基板を保持するシャーシとを備えたプラズマディスプレイ装置である。このプラズマディスプレイ装置において、背面基板におけるデータ電極を形成した面とは反対側の面に、データ電極に平行な間隙を設けた導電性シートを２枚設け、２枚の導電性シートの間に表示電極対に平行な間隙を設け、表示電極対に平行な間隙とデータ電極に平行な間隙とで十字状の間隙を設けてもよい。 The present invention includes a panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs intersect with the data electrodes, and a driving circuit for driving the panel is mounted. The plasma display device includes a circuit board and a chassis that holds the panel and the circuit board. In this plasma display device, two conductive sheets having a gap parallel to the data electrodes are provided on the surface opposite to the surface on which the data electrodes are formed on the back substrate, and display is performed between the two conductive sheets. A gap parallel to the electrode pair may be provided, and a cross-shaped gap may be provided by a gap parallel to the display electrode pair and a gap parallel to the data electrode.
　この構成により、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができる。 This configuration can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in the case of a plasma display device using a panel having a large size and high image quality.
図１は、本発明の実施の形態１におけるプラズマディスプレイ装置に用いるパネルの構造を示す分解斜視図である。FIG. 1 is an exploded perspective view showing a structure of a panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention. 図２は、本発明の実施の形態１におけるプラズマディスプレイ装置に用いるパネルの電極配列図である。FIG. 2 is an electrode array diagram of the panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention. 図３は、本発明の実施の形態１におけるプラズマディスプレイ装置において前面基板側から見たパネルの外観を模式的に示す平面図である。FIG. 3 is a plan view schematically showing the appearance of the panel viewed from the front substrate side in the plasma display device in accordance with the first exemplary embodiment of the present invention. 図４は、本発明の実施の形態１におけるプラズマディスプレイ装置において背面基板側から見たパネルの外観を模式的に示す平面図である。FIG. 4 is a plan view schematically showing the appearance of the panel viewed from the back substrate side in the plasma display device in accordance with the first exemplary embodiment of the present invention. 図５は、本発明の実施の形態１におけるプラズマディスプレイ装置の構造を示す分解斜視図である。FIG. 5 is an exploded perspective view showing the structure of the plasma display device in accordance with the first exemplary embodiment of the present invention. 図６は、本発明の実施の形態１におけるプラズマディスプレイ装置において背面電極の分割数と不要輻射の垂直偏波に対する強度との関係を示す図である。FIG. 6 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of the unwanted radiation with respect to the vertical polarization in the plasma display device in accordance with the first exemplary embodiment. 図７は、本発明の実施の形態１におけるプラズマディスプレイ装置のガスケットの配置位置の他の一例を示す図である。FIG. 7 is a diagram showing another example of the arrangement position of the gasket of the plasma display device in accordance with the first exemplary embodiment of the present invention. 図８は、本発明の実施の形態１におけるプラズマディスプレイ装置の導電性シートの形状の他の一例を示す図である。FIG. 8 is a diagram showing another example of the shape of the conductive sheet of the plasma display device in accordance with the first exemplary embodiment of the present invention. 図９は、本発明の実施の形態１におけるプラズマディスプレイ装置の導電性シートの形状のさらに他の一例を示す図である。FIG. 9 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the first exemplary embodiment of the present invention. 図１０は、本発明の実施の形態２におけるプラズマディスプレイ装置において背面電極の分割数と不要輻射の水平偏波に対する強度との関係を示す図である。FIG. 10 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of unwanted radiation with respect to the horizontal polarization in the plasma display device according to the second exemplary embodiment of the present invention. 図１１は、本発明の実施の形態２におけるプラズマディスプレイ装置において背面基板側から見たパネルの外観を模式的に示す平面図である。FIG. 11 is a plan view schematically showing the appearance of the panel viewed from the back substrate side in the plasma display device in accordance with the second exemplary embodiment of the present invention. 図１２は、本発明の実施の形態２におけるプラズマディスプレイ装置の導電性シートの形状の他の一例を示す図である。FIG. 12 is a diagram showing another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention. 図１３は、本発明の実施の形態２におけるプラズマディスプレイ装置の導電性シートの形状のさらに他の一例を示す図である。FIG. 13 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention. 図１４は、本発明の実施の形態２におけるプラズマディスプレイ装置の導電性シートの形状のさらに他の一例を示す図である。FIG. 14 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device in accordance with the second exemplary embodiment of the present invention.
　以下、本発明の実施の形態におけるプラズマディスプレイ装置について、図面を用いて説明する。 Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to the drawings.
　（実施の形態１）
　図１は、本発明の実施の形態１におけるプラズマディスプレイ装置に用いるパネル１０の構造を示す分解斜視図である。 (Embodiment 1)
FIG. 1 is an exploded perspective view showing the structure of panel 10 used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
　ガラス製の前面基板１１上には、走査電極１２と維持電極１３とからなる表示電極対１４が複数形成されている。そして、走査電極１２と維持電極１３とを覆うように誘電体層１５が形成され、その誘電体層１５上に保護層１６が形成されている。 A plurality of display electrode pairs 14 each including a scanning electrode 12 and a sustaining electrode 13 are formed on a glass front substrate 11. A dielectric layer 15 is formed so as to cover the scan electrode 12 and the sustain electrode 13, and a protective layer 16 is formed on the dielectric layer 15.
　保護層１６は、放電セルにおける放電を発生しやすくするために、電子放出性能の高い材料である酸化マグネシウム（ＭｇＯ）を主成分とする材料で形成されている。 The protective layer 16 is formed of a material mainly composed of magnesium oxide (MgO), which is a material having high electron emission performance, in order to easily generate discharge in the discharge cell.
　保護層１６は、一つの層で構成されていてもよく、あるいは複数の層で構成されていてもよい。また、層の上に粒子が存在する構成であってもよい。 The protective layer 16 may be composed of a single layer or may be composed of a plurality of layers. Moreover, the structure which particle | grains exist on a layer may be sufficient.
　背面基板２１上にはデータ電極２２が複数形成され、データ電極２２を覆うように誘電体層２３が形成され、さらにその上に井桁状の隔壁２４が形成されている。そして、隔壁２４の側面および誘電体層２３上には赤色（Ｒ）、緑色（Ｇ）および青色（Ｂ）の各色に発光する蛍光体層２５が設けられている。 A plurality of data electrodes 22 are formed on the rear substrate 21, a dielectric layer 23 is formed so as to cover the data electrodes 22, and a grid-like partition wall 24 is further formed thereon. A phosphor layer 25 that emits light of each color of red (R), green (G), and blue (B) is provided on the side surface of the partition wall 24 and the dielectric layer 23.
　これら前面基板１１と背面基板２１とを、微小な放電空間を挟んで表示電極対１４とデータ電極２２とが交差するように対向配置し、前面基板１１と背面基板２１との間隙に放電空間を設ける。そして、その外周部をガラスフリット等の封着材によって封着する。そして、その内部の放電空間には、例えばネオン（Ｎｅ）とキセノン（Ｘｅ）の混合ガスを放電ガスとして封入する。 The front substrate 11 and the rear substrate 21 are arranged to face each other so that the display electrode pair 14 and the data electrode 22 cross each other with a minute discharge space interposed therebetween, and a discharge space is formed in the gap between the front substrate 11 and the rear substrate 21. Provide. And the outer peripheral part is sealed with sealing materials, such as glass frit. Then, for example, a mixed gas of neon (Ne) and xenon (Xe) is sealed in the discharge space inside as a discharge gas.
　放電空間は隔壁２４によって複数の区画に仕切られており、表示電極対１４とデータ電極２２とが交差する部分に、画素を構成する放電セルが形成される。そして、これらの放電セルを放電、発光（点灯）することにより、パネル１０にカラーの画像が表示される。 The discharge space is partitioned into a plurality of sections by the barrier ribs 24, and discharge cells constituting pixels are formed at the intersections between the display electrode pairs 14 and the data electrodes 22. A color image is displayed on the panel 10 by discharging and emitting (lighting) these discharge cells.
　このように、パネル１０は、複数の表示電極対１４を形成した前面基板１１と複数のデータ電極２２を形成した背面基板２１とを、表示電極対１４とデータ電極２２とが交差するように対向配置して形成されている。 As described above, the panel 10 faces the front substrate 11 on which the plurality of display electrode pairs 14 are formed and the rear substrate 21 on which the plurality of data electrodes 22 are formed so that the display electrode pairs 14 and the data electrodes 22 cross each other. It is arranged and formed.
　なお、パネル１０においては、表示電極対１４が延伸する方向に配列された連続する３つの放電セル、すなわち、赤色（Ｒ）に発光する放電セルと、緑色（Ｇ）に発光する放電セルと、青色（Ｂ）に発光する放電セルとの３つの放電セルで１つの画素が構成される。 In panel 10, three consecutive discharge cells arranged in the direction in which display electrode pairs 14 extend, that is, discharge cells that emit red (R), and discharge cells that emit green (G), One pixel is composed of three discharge cells, ie, discharge cells emitting blue (B).
　なお、パネル１０の構造は上述したものに限られるわけではなく、例えばストライプ状の隔壁を備えたものであってもよい。また、放電ガスの混合比率は、例えばキセノン分圧を１０％にしてもよいが、放電セルにおける発光効率を向上するためにキセノン分圧をさらに上げてもよく、その他の混合比率であってもよい。 Note that the structure of the panel 10 is not limited to the above-described structure, and may be, for example, provided with a stripe-shaped partition wall. The mixing ratio of the discharge gas may be, for example, a xenon partial pressure of 10%, but the xenon partial pressure may be further increased in order to improve the light emission efficiency in the discharge cell. Good.
　図２は、本発明の実施の形態１におけるプラズマディスプレイ装置に用いるパネル１０の電極配列図である。 FIG. 2 is an electrode array diagram of panel 10 used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
　パネル１０には、水平方向（行方向、ライン方向）に延長されたｎ本の走査電極１２およびｎ本の維持電極１３が配列され、垂直方向（列方向）に延長されたｍ本のデータ電極２２が配列されている。 The panel 10 includes n scan electrodes 12 and n sustain electrodes 13 extended in the horizontal direction (row direction, line direction), and m data electrodes extended in the vertical direction (column direction). 22 are arranged.
　そして、１対の走査電極１２および維持電極１３と１つのデータ電極２２とが交差した領域に放電セルが１つ形成される。すなわち、１対の表示電極対１４上には、ｍ個の放電セルが形成され、ｍ／３個の画素が形成される。そして、放電セルは放電空間内にｍ×ｎ個形成され、ｍ×ｎ個の放電セルが形成された領域がパネル１０の画像表示領域となる。例えば、画素数が１９２０×１０８０個のパネルでは、ｍ＝１９２０×３となり、ｎ＝１０８０となる。なお、本実施の形態においては、ｎ＝１０８０とするが、本発明は何らこの数値に限定されるものではない。 Then, one discharge cell is formed in a region where the pair of scan electrodes 12 and sustain electrodes 13 and one data electrode 22 intersect. In other words, m discharge cells are formed on one pair of display electrodes 14 and m / 3 pixels are formed. Then, m × n discharge cells are formed in the discharge space, and an area where m × n discharge cells are formed becomes an image display area of the panel 10. For example, in a panel having 1920 × 1080 pixels, m = 1920 × 3 and n = 1080. In the present embodiment, n = 1080, but the present invention is not limited to this value.
　図３は、本発明の実施の形態１におけるプラズマディスプレイ装置において、前面基板１１側から見たパネル１０の外観を模式的に示す平面図である。 FIG. 3 is a plan view schematically showing the appearance of panel 10 as viewed from the front substrate 11 side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
　４２インチのハイビジョン仕様のパネル１０の場合、前面基板１１の寸法は、例えば短辺の長さが５５４ｍｍ、長辺の長さが９８０ｍｍであり、背面基板２１は、例えば短辺の長さが５７０ｍｍ、長辺の長さが９６４ｍｍである。 In the case of the 42-inch high-definition panel 10, the dimensions of the front substrate 11 are, for example, a short side length of 554 mm and a long side length of 980 mm, and the back substrate 21 has a short side length of, for example, 570 mm. The length of the long side is 964 mm.
　背面基板２１の四辺の下側（図３における下側の長辺）には、データ電極２２用の電極引出部２８が形成されている。電極引出部２８は、対応するデータ電極２２にそれぞれ接続されている。この電極引出部２８は複数のブロックに分かれている。そして、各々のブロックには、データ電極２２を駆動するための集積回路（ＩＣ）を搭載したＦＰＣ（Ｆｌｅｘｉｂｌｅ　Ｐｒｉｎｔｅｄ　Ｃｉｒｃｕｉｔｓ：図示せず）が接続される。なお、図３には、画像表示領域を一点鎖線で示している。 On the lower side of the four sides of the back substrate 21 (the lower long side in FIG. 3), electrode lead portions 28 for the data electrodes 22 are formed. The electrode lead portion 28 is connected to the corresponding data electrode 22. The electrode lead portion 28 is divided into a plurality of blocks. Each block is connected to an FPC (Flexible Printed Circuits: not shown) equipped with an integrated circuit (IC) for driving the data electrode 22. In FIG. 3, the image display area is indicated by a one-dot chain line.
　図４は、本発明の実施の形態１におけるプラズマディスプレイ装置において背面基板２１側から見たパネル１０の外観を模式的に示す平面図である。 FIG. 4 is a plan view schematically showing the outer appearance of panel 10 as viewed from the back substrate 21 side in the plasma display device in accordance with the first exemplary embodiment of the present invention.
　前面基板１１の四辺の左側（図４における左側の短辺）には走査電極１２用の電極引出部１８が形成されている。電極引出部１８は、対応する走査電極１２にそれぞれ接続されている。 An electrode lead-out portion 18 for the scanning electrode 12 is formed on the left side of the four sides of the front substrate 11 (the short side on the left side in FIG. 4). The electrode lead-out portions 18 are connected to the corresponding scanning electrodes 12 respectively.
　前面基板１１の四辺の右側（図４における右側の短辺）には維持電極１３用の電極引出部１９が形成されている。電極引出部１９のそれぞれはｎ本の維持電極１３に接続されている。 An electrode lead-out portion 19 for the sustain electrode 13 is formed on the right side of the four sides of the front substrate 11 (the short side on the right side in FIG. 4). Each of the electrode lead portions 19 is connected to n sustain electrodes 13.
　これら電極引出部１８、１９もそれぞれが複数のブロックに分かれている。そして、各々のブロックには、走査電極１２用のＦＰＣおよび維持電極１３用のＦＰＣ（ともに図示せず）が接続される。 These electrode lead-out portions 18 and 19 are also divided into a plurality of blocks. Each block is connected to an FPC for scan electrode 12 and an FPC for sustain electrode 13 (both not shown).
　パネル１０は、背面電極３１を有する。この背面電極３１は、グランド電極としての働きを有する。そして、図４に示すように、背面電極３１は、背面基板２１におけるデータ電極２２を形成した面とは反対側の面に貼り付けられた複数枚の導電性シートで形成されている。 The panel 10 has a back electrode 31. The back electrode 31 functions as a ground electrode. As shown in FIG. 4, the back electrode 31 is formed of a plurality of conductive sheets attached to the surface of the back substrate 21 opposite to the surface on which the data electrodes 22 are formed.
　実施の形態１においては、導電性シートとして２枚のアルミニウムシート３１ａ、３１ｂを用いる。アルミニウムシート３１ａ、３１ｂは、シート状に形成されたアルミニウム箔の一方の面に粘着層を設けた構造を有する。アルミニウムシート３１ａ、３１ｂのそれぞれの寸法は、縦が２３５ｍｍ、横が８９５ｍｍ、厚みが１００μｍである。 In Embodiment 1, two aluminum sheets 31a and 31b are used as conductive sheets. The aluminum sheets 31a and 31b have a structure in which an adhesive layer is provided on one surface of an aluminum foil formed in a sheet shape. The dimensions of the aluminum sheets 31a and 31b are 235 mm in length, 895 mm in width, and 100 μm in thickness.
　そして、画像表示領域の上半分に対応する位置にアルミニウムシート３１ａを貼り付け、画像表示領域の下半分に対応する位置にアルミニウムシート３１ｂを貼り付けて、背面電極３１を形成する。このとき、本実施の形態においては、２枚のアルミニウムシート３１ａ、３１ｂが互いに直接的な接触をしないように背面基板２１に貼り付ける。具体的には、アルミニウムシート３１ａとアルミニウムシート３１ｂとの間に表示電極対１４と平行な１本の間隙６１（図４において、水平方向に延伸する間隙）を設けて背面基板２１に貼り付ける。本実施の形態において、この間隙６１の幅は、例えば約１５ｍｍである。 Then, the aluminum sheet 31a is attached to a position corresponding to the upper half of the image display area, and the aluminum sheet 31b is attached to a position corresponding to the lower half of the image display area to form the back electrode 31. At this time, in the present embodiment, the two aluminum sheets 31a and 31b are attached to the back substrate 21 so as not to be in direct contact with each other. Specifically, a gap 61 (gap extending in the horizontal direction in FIG. 4) parallel to the display electrode pair 14 is provided between the aluminum sheet 31 a and the aluminum sheet 31 b and is attached to the back substrate 21. In the present embodiment, the width of the gap 61 is about 15 mm, for example.
　このように、本実施の形態における背面電極３１は、背面基板２１におけるデータ電極２２を形成した面とは反対側の面に、表示電極対１４と平行になるように設けられた１本の間隙６１を隔てて貼り付けられた２枚の導電性のアルミニウムシート３１ａ、３１ｂで形成されている。 As described above, the back electrode 31 in the present embodiment is a single gap provided on the surface of the back substrate 21 opposite to the surface on which the data electrode 22 is formed so as to be parallel to the display electrode pair 14. It is formed of two conductive aluminum sheets 31 a and 31 b that are pasted with 61 therebetween.
　したがって、本実施の形態においてアルミニウムシート３１ａ、３１ｂの間に形成される間隙６１は、背面基板２１のほぼ中央で水平方向に延伸する１本の線状になる。 Therefore, in the present embodiment, the gap 61 formed between the aluminum sheets 31a and 31b is a single line extending in the horizontal direction at substantially the center of the back substrate 21.
　背面基板２１の背面電極３１の周囲には、背面電極３１と重ならない位置に両面接着テープ４１が貼り付けられている。両面接着テープ４１は、後述するシャーシにパネル１０を保持するために設けられている。すなわち、この両面接着テープ４１によって、パネル１０はシャーシに保持されている。 A double-sided adhesive tape 41 is affixed around the back electrode 31 of the back substrate 21 at a position that does not overlap the back electrode 31. The double-sided adhesive tape 41 is provided to hold the panel 10 in a chassis described later. That is, the panel 10 is held on the chassis by the double-sided adhesive tape 41.
　本実施の形態において用いる両面接着テープ４１は、幅が２０ｍｍ、厚みが１ｍｍのアクリル系樹脂テープである。なお、本実施の形態において、両面接着テープ４１は何ら上述の寸法および素材に限定されないが、両面接着テープ４１の厚みは背面電極３１の厚みと比較して十分に大きいことが望ましい。 The double-sided adhesive tape 41 used in the present embodiment is an acrylic resin tape having a width of 20 mm and a thickness of 1 mm. In the present embodiment, the double-sided adhesive tape 41 is not limited to the above-described dimensions and materials, but the thickness of the double-sided adhesive tape 41 is desirably sufficiently larger than the thickness of the back electrode 31.
　なお、背面電極３１を形成するアルミニウムシート３１ａ、３１ｂの寸法や、アルミニウムシート３１ａ、３１ｂ間の間隙６１の幅は、上述した数値に限定されるものではない。これらの数値は、パネル１０の寸法や画像表示領域の寸法等に応じて最適に設定することが望ましい。 It should be noted that the dimensions of the aluminum sheets 31a and 31b forming the back electrode 31 and the width of the gap 61 between the aluminum sheets 31a and 31b are not limited to the numerical values described above. These numerical values are desirably set optimally according to the dimensions of the panel 10 and the dimensions of the image display area.
　また、上述の説明ではアルミニウムシート３１ａ、３１ｂの大きさは互いに等しい寸法であるものとしたが、これらは厳密に等しくなくてもよく、多少の寸法的な違いは許容される。 In the above description, the aluminum sheets 31a and 31b have the same size as each other, but they may not be exactly the same, and some dimensional differences are allowed.
　また、アルミニウムシート３１ａ、３１ｂの厚みも上述した数値に限定されるものではない。しかし、熱伝導度の大きさや、製造時におけるシートを貼り付けるときの作業性等を考慮すると、約５０μｍ～２００μｍの範囲で設定することが望ましい。 Further, the thicknesses of the aluminum sheets 31a and 31b are not limited to the above-described numerical values. However, in consideration of the degree of thermal conductivity, workability when a sheet is attached at the time of manufacture, etc., it is desirable to set in the range of about 50 μm to 200 μm.
　また、上述の説明では導電性シートとしてアルミニウムシートを用いる例を示したが、本発明は導電性シートがアルミニウムシートに限定されるものではない。導電性シートは、導電性が高くかつ熱伝導度の高い素材であればよく、例えば銅箔シート等を導電性シートとして用いることができる。 In the above description, an example in which an aluminum sheet is used as the conductive sheet has been shown. However, in the present invention, the conductive sheet is not limited to the aluminum sheet. The conductive sheet may be a material having high conductivity and high thermal conductivity. For example, a copper foil sheet or the like can be used as the conductive sheet.
　なお、図４には、後述するガスケット４３が背面電極３１に接触する位置を破線で示している。 In addition, in FIG. 4, the position where the gasket 43 mentioned later contacts the back electrode 31 is shown with the broken line.
　図５は、本発明の実施の形態１におけるプラズマディスプレイ装置５０の構造を示す分解斜視図である。 FIG. 5 is an exploded perspective view showing the structure of the plasma display device 50 according to the first embodiment of the present invention.
　プラズマディスプレイ装置５０は、ＦＰＣ４５が取り付けられたパネル１０、ガスケット４３、シャーシ５１、回路基板５３、これらを収納する前面枠５４およびバックカバー５５を備えている。 The plasma display device 50 includes a panel 10 to which an FPC 45 is attached, a gasket 43, a chassis 51, a circuit board 53, a front frame 54 for storing them, and a back cover 55.
　パネル１０は、背面電極３１の周囲に貼り付けられた両面接着テープ４１によってシャーシ５１に保持されている。 The panel 10 is held on the chassis 51 by a double-sided adhesive tape 41 affixed around the back electrode 31.
　ガスケット４３は、導電性を有する弾性体であり、ウレタンの発泡海綿体を金属製の網で覆った構成を有する。そして背面電極３１は、ガスケット４３を介して、シャーシ５１と電気的に接続されている。 The gasket 43 is an elastic body having conductivity, and has a configuration in which a foamed sponge body of urethane is covered with a metal net. The back electrode 31 is electrically connected to the chassis 51 via the gasket 43.
　図４に示したように、ガスケット４３は、背面基板２１の上半分に貼り付けられたアルミニウムシート３１ａの右上の位置および左上の位置の２箇所と、背面基板２１の下半分に貼り付けられたアルミニウムシート３１ｂの右下の位置および左下の位置の２箇所との合計４箇所に配置される。 As shown in FIG. 4, the gasket 43 was affixed to two locations, the upper right position and the upper left position of the aluminum sheet 31 a affixed to the upper half of the back substrate 21, and the lower half of the back substrate 21. The aluminum sheet 31b is disposed at a total of four locations including a lower right position and a lower left position.
　アルミニウムシート３１ａ、３１ｂは熱伝導性が高いため放熱板としても機能し、パネル１０で発生する熱をシャーシ５１に放熱する。 Since the aluminum sheets 31a and 31b have high thermal conductivity, the aluminum sheets 31a and 31b also function as a heat radiating plate and radiate heat generated in the panel 10 to the chassis 51.
　ガスケット４３を配置した近傍では厚みが１ｍｍの両面接着テープ４１でパネル１０とシャーシ５１とが接着される。上述したようにアルミニウムシート３１ａ、３１ｂの厚みは約０．１ｍｍである。したがって、ガスケット４３は、およそ０．９ｍｍの厚みに圧縮された状態で、背面電極３１（アルミニウムシート３１ａ、３１ｂ）とシャーシ５１との間に挟まれる。こうして背面電極３１とシャーシ５１とが電気的に接続される。 In the vicinity where the gasket 43 is disposed, the panel 10 and the chassis 51 are bonded with a double-sided adhesive tape 41 having a thickness of 1 mm. As described above, the thickness of the aluminum sheets 31a and 31b is about 0.1 mm. Therefore, the gasket 43 is sandwiched between the back electrode 31 ( aluminum sheets 31a and 31b) and the chassis 51 in a compressed state of about 0.9 mm. Thus, the back electrode 31 and the chassis 51 are electrically connected.
　なお、ガスケット４３が介在しない場所では、背面電極３１とシャーシ５１との間に約０．９ｍｍの隙間ができる。このように本実施の形態においては、熱伝導シートによってパネル１０の裏面全体をシャーシ５１に密着させるのではなく、背面電極３１の周囲に貼り付けられた両面接着テープ４１を用いてパネル１０をシャーシ５１に保持する。そのため、ガスケット４３および両面接着テープ４１を除くパネル１０の裏面の大部分とシャーシ５１との間に隙間が存在する。 In addition, in a place where the gasket 43 is not interposed, a gap of about 0.9 mm is formed between the back electrode 31 and the chassis 51. As described above, in the present embodiment, the entire back surface of the panel 10 is not closely attached to the chassis 51 by the heat conductive sheet, but the panel 10 is attached to the chassis using the double-sided adhesive tape 41 attached around the back electrode 31. 51. Therefore, a gap exists between the chassis 51 and most of the back surface of the panel 10 excluding the gasket 43 and the double-sided adhesive tape 41.
　なお、本実施の形態において、背面電極３１とシャーシ５１とを電気的に接続するものは、何ら上述したガスケット４３に限定されない。背面電極３１とシャーシ５１とを電気的に接続するものであればガスケット４３以外のものを用いてもよい。例えば、ガスケット４３の代わりに、導電性のバネ、スチールウール、導電性テープ等を用いてもよい。あるいは、シャーシ５１に背面電極３１との電気的な接続をするための凸部を設けてもよい。ただし、背面電極３１とシャーシ５１との電気的な接続を確実にするために、背面電極３１とシャーシ５１との電気的な接続点をアルミニウムシート１枚あたり２箇所以上設けることが望ましい。 In addition, in this Embodiment, what electrically connects the back electrode 31 and the chassis 51 is not limited to the gasket 43 mentioned above at all. Any material other than the gasket 43 may be used as long as it electrically connects the back electrode 31 and the chassis 51. For example, instead of the gasket 43, a conductive spring, steel wool, conductive tape, or the like may be used. Or you may provide the convex part for making the electrical connection with the back electrode 31 in the chassis 51. FIG. However, in order to ensure electrical connection between the back electrode 31 and the chassis 51, it is desirable to provide two or more electrical connection points between the back electrode 31 and the chassis 51 per aluminum sheet.
　回路基板５３は、パネル１０を駆動する各種の駆動回路を搭載した複数の回路基板を含む。複数の回路基板には、走査電極１２に印加する駆動電圧を発生する駆動回路を搭載した回路基板、維持電極１３に印加する駆動電圧を発生する駆動回路を搭載した回路基板、データ電極２２に印加する駆動電圧を発生する駆動回路を搭載した回路基板、これら駆動回路に電力を供給する電源回路を搭載した回路基板等がある。そして、回路基板５３は、シャーシ５１におけるパネル１０を保持している面の反対側の面に取り付けられている。 The circuit board 53 includes a plurality of circuit boards on which various drive circuits for driving the panel 10 are mounted. A circuit board on which a drive circuit for generating a drive voltage to be applied to the scan electrode 12 is mounted on a plurality of circuit boards, a circuit board on which a drive circuit for generating a drive voltage to be applied to the sustain electrode 13 is mounted, and a data electrode 22 There are circuit boards on which drive circuits for generating drive voltages are mounted, circuit boards on which power supply circuits for supplying power to these drive circuits are mounted. The circuit board 53 is attached to the surface of the chassis 51 opposite to the surface holding the panel 10.
　シャーシ５１は、本実施の形態においては、厚さ０．８ｍｍの鋼板に絞り加工（金型に鋼板をプレスして行う加工）を施して成形されている。そして、シャーシ５１はパネル１０および回路基板５３を保持している。 In the present embodiment, the chassis 51 is formed by drawing a steel sheet having a thickness of 0.8 mm (processing performed by pressing the steel sheet on a mold). The chassis 51 holds the panel 10 and the circuit board 53.
　次に、背面電極３１を、画像表示領域の上半分に対応する位置および画像表示領域の下半分に対応する位置のそれぞれに貼り付けられた２枚のアルミニウムシート３１ａ、３１ｂで構成した理由について説明する。 Next, the reason why the back electrode 31 is composed of two aluminum sheets 31a and 31b attached to the position corresponding to the upper half of the image display area and the position corresponding to the lower half of the image display area will be described. To do.
　本願の発明者らは、不要輻射について以下の測定を行った。 The inventors of the present application performed the following measurement for unnecessary radiation.
　本願の発明者らは、背面基板２１の画像表示領域に対応する領域（背面基板２１のほぼ全面）に１枚のアルミニウムシートを貼り付けて背面電極３１を構成したサンプル（分割なしサンプル）、および表示電極対１４と平行に短冊状にＮ枚（Ｎ＝２、４、８、・・・）に分割したアルミニウムシートを背面基板２１に貼り付けて背面電極３１を構成したサンプル（Ｎ分割サンプル）を作成した。そして、それぞれのサンプルにおいて不要輻射の強度を測定した。 The inventors of the present application are a sample (non-divided sample) in which the back electrode 31 is configured by attaching one aluminum sheet to a region corresponding to the image display region of the back substrate 21 (almost the entire surface of the back substrate 21), and A sample (N-divided sample) in which the back electrode 31 is formed by attaching an aluminum sheet divided into N strips (N = 2, 4, 8,...) In parallel with the display electrode pair 14 to the back substrate 21. It was created. And the intensity | strength of unnecessary radiation was measured in each sample.
　その結果、本願の発明者らは、背面電極３１の分割数が不要輻射の強度に大きな影響を及ぼすことを見いだした。 As a result, the inventors of the present application have found that the number of divisions of the back electrode 31 greatly affects the intensity of unnecessary radiation.
　図６は、本発明の実施の形態１におけるプラズマディスプレイ装置５０において背面電極３１の分割数と不要輻射の垂直偏波に対する強度との関係を示す図である。図６において、縦軸は不要輻射の垂直偏波に対する輻射強度（１１０ＭＨｚで測定）を示し、横軸は背面電極３１の上下方向の分割数を示している。 FIG. 6 is a diagram showing a relationship between the number of divisions of the back electrode 31 and the intensity of the unwanted radiation with respect to the vertical polarization in the plasma display device 50 according to the first embodiment of the present invention. In FIG. 6, the vertical axis indicates the radiation intensity (measured at 110 MHz) with respect to the vertical polarization of unwanted radiation, and the horizontal axis indicates the number of divisions in the vertical direction of the back electrode 31.
　不要輻射の垂直偏波成分は、背面電極３１（分割なし）を設けることにより、背面電極３１を設けないときよりも低下する（背面電極３１を設けないときのデータは図示せず）。そして、図６に示すように、背面電極３１を上下に２分割することにより、１枚のアルミニウムシートで背面電極３１（分割なし）を構成するときよりも、不要輻射が約１７（ｄＢμＶ／ｍ）低下することが確認された。 The vertically polarized wave component of unnecessary radiation is lower by providing the back electrode 31 (no division) than when the back electrode 31 is not provided (data when the back electrode 31 is not provided is not shown). Then, as shown in FIG. 6, by dividing the back electrode 31 vertically into two, unnecessary radiation is about 17 (dBμV / m) as compared with the case where the back electrode 31 (no division) is formed with a single aluminum sheet. ) Confirmed to decrease.
　そして本願の発明者らは、背面電極３１の分割数を２より大きくしても、不要輻射の強度は低下せず、逆に増加することを確認した。 The inventors of the present application confirmed that, even if the number of divisions of the back electrode 31 is greater than 2, the intensity of unnecessary radiation does not decrease but increases.
　このように、背面電極３１を２枚のアルミニウムシート３１ａ、３１ｂで構成し、２枚のアルミニウムシート３１ａ、３１ｂを、背面基板２１における画像表示領域の上半分に対応する位置および画像表示領域の下半分に対応する位置のそれぞれに貼り付けると、不要輻射の垂直偏波に関する強度が最も低下する。 In this way, the back electrode 31 is composed of two aluminum sheets 31a and 31b, and the two aluminum sheets 31a and 31b are positioned at a position corresponding to the upper half of the image display area on the back substrate 21 and below the image display area. If it is attached to each of the positions corresponding to half, the intensity related to the vertical polarization of unwanted radiation is the lowest.
　これは、次のような現象が生じていると考えられる。背面電極３１を分割することによって放電電流（放電セルに発生する放電によって背面電極３１に生じる電流）の垂直方向の経路が変化する。そのため、放電電流の経路上に発生する共振の周波数に変化が起こり、共振に起因する不要輻射の周波数が変化していると考えられる。また、背面電極３１を分割することによって、アルミニウムシートの寸法（縦と横のサイズ）に起因する共振（平板共振）も変化する。そのため、平板共振に起因する不要輻射の周波数も変化していると考えられる。 This is considered to be caused by the following phenomenon. Dividing the back electrode 31 changes the vertical path of the discharge current (current generated in the back electrode 31 by the discharge generated in the discharge cell). For this reason, it is considered that the frequency of resonance generated on the path of the discharge current is changed, and the frequency of unnecessary radiation due to resonance is changed. Further, by dividing the back electrode 31, the resonance (flat plate resonance) caused by the dimensions (vertical and horizontal sizes) of the aluminum sheet also changes. For this reason, it is considered that the frequency of the unwanted radiation due to the plate resonance is also changing.
　なお、上述した例では、図４に破線で示したように、４個のガスケット４３をアルミニウムシート３１ａ、３１ｂのそれぞれの外周端部よりも内側に配置した。しかし、本発明においてガスケット４３の配置位置は何らこの位置に限定されるものではない。 In the above-described example, as indicated by broken lines in FIG. 4, the four gaskets 43 are arranged on the inner side of the outer peripheral end portions of the aluminum sheets 31 a and 31 b. However, in the present invention, the arrangement position of the gasket 43 is not limited to this position.
　図７は、本発明の実施の形態１におけるプラズマディスプレイ装置５０のガスケット４３の配置位置の他の一例を示す図である。 FIG. 7 is a diagram showing another example of the arrangement position of the gasket 43 of the plasma display device 50 according to Embodiment 1 of the present invention.
　図７に示すように、ガスケット４３の一部がアルミニウムシート３１ａ、３１ｂの外周端部からはみ出す位置にガスケット４３を配置してもよい。この構成では、アルミニウムシート３１ａ、３１ｂの端部がガスケット４３によって押さえられる。したがって、アルミニウムシート３１ａ、３１ｂの剥がれを防止することができる。 As shown in FIG. 7, the gasket 43 may be disposed at a position where a part of the gasket 43 protrudes from the outer peripheral ends of the aluminum sheets 31 a and 31 b. In this configuration, the end portions of the aluminum sheets 31 a and 31 b are pressed by the gasket 43. Therefore, peeling of the aluminum sheets 31a and 31b can be prevented.
　なお、本実施の形態では、２枚の導電性シート（アルミニウムシート３１ａ、３１ｂ）によって表示電極対１４に平行な１本の間隙６１を設ける構成を説明したが、本発明は背面電極３１を構成する導電性シートの数が何ら２枚に限定されるものではない。表示電極対１４に平行な１本の間隙を設けることができれば、３枚、あるいはそれ以上の導電性シートによって背面電極３１を構成してもよい。 In the present embodiment, the configuration in which one gap 61 parallel to the display electrode pair 14 is provided by two conductive sheets ( aluminum sheets 31a and 31b) has been described. The number of conductive sheets to be performed is not limited to two. As long as one gap parallel to the display electrode pair 14 can be provided, the back electrode 31 may be constituted by three or more conductive sheets.
　図８は、本発明の実施の形態１におけるプラズマディスプレイ装置５０の導電性シートの形状の他の一例を示す図である。図９は、本発明の実施の形態１におけるプラズマディスプレイ装置５０の導電性シートの形状のさらに他の一例を示す図である。 FIG. 8 is a diagram showing another example of the shape of the conductive sheet of the plasma display device 50 according to the first exemplary embodiment of the present invention. FIG. 9 is a diagram showing still another example of the shape of the conductive sheet of plasma display device 50 according to the first exemplary embodiment of the present invention.
　例えば、図８に示すように、アルミニウムシート３１ａ、３１ｂに代えて、アルミニウムシート３１ａの半分の大きさのアルミニウムシート３１ｃ、３１ｄを互いに直接的に接触した状態で背面基板２１に貼り付け、アルミニウムシート３１ｂの半分の大きさのアルミニウムシート３１ｅ、３１ｆを互いに直接的に接触した状態で背面基板２１に貼り付けて背面電極３１を構成し、表示電極対１４に平行な１本の間隙６２を設けてもよい。 For example, as shown in FIG. 8, instead of the aluminum sheets 31a and 31b, aluminum sheets 31c and 31d, which are half the size of the aluminum sheet 31a, are attached to the back substrate 21 in direct contact with each other, and the aluminum sheet Aluminum sheets 31e and 31f, which are half the size of 31b, are attached to the back substrate 21 in direct contact with each other to form the back electrode 31, and a single gap 62 parallel to the display electrode pair 14 is provided. Also good.
　あるいは、図９に示すように、導電性シートの一部を切り抜いて表示電極対１４に平行な間隙６３（図４に示した間隙６１とほぼ同形状の間隙）を形成した１枚の導電性シート３１ｇによって背面電極３１を構成してもよい。図９に示す構成では、あらかじめ１本の間隙６３の形状に沿った切れ目を導電性シート３１ｇに入れておき、導電性シート３１ｇを背面基板２１に貼り付けた後、切れ目に沿って導電性シート３１ｇの一部を剥ぎ取ることで表示電極対１４に平行な１本の間隙６３を設けることができる。これにより、プラズマディスプレイ装置５０を製造するときの効率化を図ることができる。 Alternatively, as shown in FIG. 9, one piece of conductive sheet in which a part of the conductive sheet is cut out to form a gap 63 parallel to the display electrode pair 14 (a gap having substantially the same shape as the gap 61 shown in FIG. 4). The back electrode 31 may be configured by the sheet 31g. In the configuration shown in FIG. 9, a cut along the shape of one gap 63 is put in the conductive sheet 31 g in advance, the conductive sheet 31 g is attached to the back substrate 21, and then the conductive sheet is cut along the cut. One gap 63 parallel to the display electrode pair 14 can be provided by peeling off a part of 31 g. Thereby, the efficiency at the time of manufacturing the plasma display apparatus 50 can be achieved.
　（実施の形態２）
　本願の発明者らは、不要輻射の水平偏波成分について以下の測定を行った。 (Embodiment 2)
The inventors of the present application performed the following measurement on the horizontally polarized component of unwanted radiation.
　本願の発明者らは、背面基板２１の画像表示領域に対応する領域（背面基板２１のほぼ全面）に１枚のアルミニウムシートを貼り付けて背面電極を構成したサンプル（分割なしサンプル）、およびデータ電極２２と平行に短冊状にＮ枚（Ｎ＝２、４、８、・・・）に分割したアルミニウムシートを背面基板２１に貼り付けて背面電極を構成したサンプル（Ｎ分割サンプル）を作成した。そして、それぞれのサンプルにおいて不要輻射の強度を測定した。 The inventors of the present application provide a sample (non-divided sample) in which a back electrode is configured by attaching one aluminum sheet to an area corresponding to the image display area of the back substrate 21 (almost the entire surface of the back substrate 21), and data A sample (N-divided sample) in which a back electrode was formed by pasting an aluminum sheet divided into N strips (N = 2, 4, 8,...) In parallel with the electrode 22 onto the back substrate 21 was prepared. . And the intensity | strength of unnecessary radiation was measured in each sample.
　その結果、本願の発明者らは、不要輻射の水平偏波成分に関しても、背面電極の分割数がその強度に大きな影響を及ぼすことを見いだした。 As a result, the inventors of the present application have found that the number of divisions of the back electrode has a great influence on the intensity of the horizontally polarized component of unwanted radiation.
　図１０は、本発明の実施の形態２におけるプラズマディスプレイ装置５０において背面電極の分割数と不要輻射の水平偏波に対する強度との関係を示す図である。図１０において、縦軸は不要輻射の水平偏波に対する輻射強度（７０ＭＨｚで測定）を示し、横軸は背面電極の左右方向の分割数を示している。 FIG. 10 is a diagram showing the relationship between the number of divisions of the back electrode and the intensity of unwanted radiation with respect to horizontal polarization in the plasma display device 50 according to Embodiment 2 of the present invention. In FIG. 10, the vertical axis indicates the radiation intensity (measured at 70 MHz) with respect to the horizontal polarization of unwanted radiation, and the horizontal axis indicates the number of divisions of the back electrode in the left-right direction.
　不要輻射の水平偏波成分は、背面電極（分割なし）を設けることにより、背面電極を設けないときよりも低下する（背面電極を設けないときのデータは図示せず）。そして、図１０に示すように、背面電極を左右に２分割することにより、１枚のアルミニウムシートで背面電極（分割なし）を構成するときよりも、不要輻射が約１０（ｄＢμＶ／ｍ）低下することが確認された。 The horizontal polarization component of unnecessary radiation is lower by providing the back electrode (no division) than when the back electrode is not provided (data when the back electrode is not provided is not shown). Then, as shown in FIG. 10, by dividing the back electrode into left and right parts, unnecessary radiation is reduced by about 10 (dBμV / m) compared to the case where the back electrode (no division) is configured with one aluminum sheet. Confirmed to do.
　そして本願の発明者らは、背面電極の分割数を２より大きくしても、不要輻射の強度は低下せず、逆に増加することを確認した。 The inventors of the present application have confirmed that even if the number of divisions of the back electrode is larger than 2, the intensity of unnecessary radiation does not decrease but increases.
　このように、背面電極を２枚のアルミニウムシートで構成し、２枚のアルミニウムシートを、背面基板２１における画像表示領域の左半分に対応する位置および画像表示領域の右半分に対応する位置のそれぞれに貼り付けると、不要輻射の水平偏波に関する強度が最も低下する。 Thus, the back electrode is composed of two aluminum sheets, and each of the two aluminum sheets has a position corresponding to the left half of the image display area on the back substrate 21 and a position corresponding to the right half of the image display area. If it is pasted on, the intensity related to the horizontal polarization of unwanted radiation is the lowest.
　これは、実施の形態１において説明した不要輻射の垂直偏波に関する強度が低下する理由とほぼ同じであろうと考えられる。 This is considered to be almost the same as the reason why the intensity related to the vertical polarization of unnecessary radiation described in the first embodiment is reduced.
　すなわち、背面電極を分割することによって放電電流（放電セルに発生する放電によって背面電極に生じる電流）の水平方向の経路が変化する。そのため、放電電流の経路上に発生する共振の周波数に変化が起こり、共振に起因する不要輻射の周波数が変化していると考えられる。また、背面電極を分割することによって、アルミニウムシートの寸法（縦と横のサイズ）に起因する共振（平板共振）も変化する。そのため、平板共振に起因する不要輻射の周波数も変化していると考えられる。 That is, by dividing the back electrode, the horizontal path of the discharge current (current generated in the back electrode by the discharge generated in the discharge cell) changes. For this reason, it is considered that the frequency of resonance generated on the path of the discharge current is changed, and the frequency of unnecessary radiation due to resonance is changed. Further, by dividing the back electrode, resonance (flat plate resonance) caused by the dimensions (vertical and horizontal sizes) of the aluminum sheet also changes. For this reason, it is considered that the frequency of the unwanted radiation due to the plate resonance is also changing.
　以上のことから、不要輻射の水平偏波成分および垂直偏波成分の双方を抑制するためには、背面電極を上下方向に２分割し、さらに左右方向に２分割して４分割すればよいことが分かる。 From the above, in order to suppress both the horizontally polarized wave component and the vertically polarized wave component of unwanted radiation, the back electrode should be divided into two parts in the vertical direction and further divided into four parts in the left and right direction. I understand.
　図１１は、本発明の実施の形態２におけるプラズマディスプレイ装置５０において背面基板２１側から見たパネル１０の外観を模式的に示す平面図である。 FIG. 11 is a plan view schematically showing the appearance of panel 10 as viewed from the back substrate 21 side in plasma display device 50 according to the second exemplary embodiment of the present invention.
　なお、実施の形態２におけるパネル１０の構造、各電極の配列、前面基板１１および背面基板２１の寸法および構造等は実施の形態１と同様であるので説明を省略する。 In addition, since the structure of the panel 10 in Embodiment 2, the arrangement of each electrode, the dimension and structure of the front substrate 11 and the back substrate 21 are the same as Embodiment 1, description is abbreviate | omitted.
　パネル１０は、背面電極３３を有する。そして、図１１に示すように、背面電極３３は、背面基板２１におけるデータ電極２２を形成した面とは反対側の面に貼り付けられた複数枚の導電性シートで形成されている。 The panel 10 has a back electrode 33. As shown in FIG. 11, the back electrode 33 is formed of a plurality of conductive sheets attached to the surface of the back substrate 21 opposite to the surface on which the data electrode 22 is formed.
　実施の形態２においては、導電性シートとして４枚のアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄを用いる。アルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄは、シート状に形成されたアルミニウム箔の一方の面に粘着層を設けた構造を有する。アルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄのそれぞれの寸法は、縦が２３５ｍｍ、横が４４０ｍｍ、厚みが１００μｍである。 In Embodiment 2, four aluminum sheets 33a, 33b, 33c, and 33d are used as the conductive sheets. The aluminum sheets 33a, 33b, 33c, and 33d have a structure in which an adhesive layer is provided on one surface of an aluminum foil formed in a sheet shape. The dimensions of the aluminum sheets 33a, 33b, 33c, and 33d are 235 mm in length, 440 mm in width, and 100 μm in thickness.
　そして、実施の形態２においては、画像表示領域を上下に２分割、左右に２分割して左上、右上、左下および右下の４分割にする。そして、画像表示領域の左上に対応する位置にアルミニウムシート３３ａを貼り付け、画像表示領域の右上に対応する位置にアルミニウムシート３３ｂを貼り付け、画像表示領域の左下に対応する位置にアルミニウムシート３３ｃを貼り付け、画像表示領域の右下に対応する位置にアルミニウムシート３３ｄを貼り付けて、背面電極３３を形成する。 In the second embodiment, the image display area is divided into two parts, upper and lower, and left and right, and divided into four parts, upper left, upper right, lower left, and lower right. Then, an aluminum sheet 33a is attached to a position corresponding to the upper left of the image display area, an aluminum sheet 33b is attached to a position corresponding to the upper right of the image display area, and an aluminum sheet 33c is attached to a position corresponding to the lower left of the image display area. The back electrode 33 is formed by pasting the aluminum sheet 33d at a position corresponding to the lower right of the image display area.
　このとき、実施の形態２においては、４枚のアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄのそれぞれが互いに直接的な接触をしないように背面基板２１に貼り付ける。 At this time, in the second embodiment, the four aluminum sheets 33a, 33b, 33c, and 33d are attached to the back substrate 21 so as not to be in direct contact with each other.
　具体的には、アルミニウムシート３３ａとアルミニウムシート３３ｃとの間、およびアルミニウムシート３３ｂとアルミニウムシート３３ｄとの間に表示電極対１４と平行な１本の間隙（図１１において、水平方向に延伸する間隙）を設けて背面基板２１に貼り付ける。実施の形態２において、この間隙の幅は、例えば約１５ｍｍである。 Specifically, one gap parallel to the display electrode pair 14 (a gap extending in the horizontal direction in FIG. 11) between the aluminum sheet 33a and the aluminum sheet 33c and between the aluminum sheet 33b and the aluminum sheet 33d. ) And affixed to the back substrate 21. In the second embodiment, the width of this gap is about 15 mm, for example.
　また、アルミニウムシート３３ａとアルミニウムシート３３ｂとの間、およびアルミニウムシート３３ｃとアルミニウムシート３３ｄとの間にデータ電極２２と平行な１本の間隙（図１１において、垂直方向に延伸する間隙）を設けて背面基板２１に貼り付ける。実施の形態２において、この間隙の幅は、例えば約１５ｍｍである。 Further, a single gap parallel to the data electrode 22 (a gap extending in the vertical direction in FIG. 11) is provided between the aluminum sheet 33a and the aluminum sheet 33b and between the aluminum sheet 33c and the aluminum sheet 33d. Affixed to the back substrate 21. In the second embodiment, the width of this gap is about 15 mm, for example.
　このように、実施の形態２における背面電極３３は、背面基板２１におけるデータ電極２２を形成した面とは反対側の面に、表示電極対１４と平行になるように設けられた間隙、およびデータ電極２２と平行になるように設けられた間隙を隔てて貼り付けられた４枚の導電性のアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄで形成されている。 As described above, the back electrode 33 according to the second embodiment has the gap provided on the surface opposite to the surface on which the data electrode 22 is formed on the back substrate 21 so as to be parallel to the display electrode pair 14 and the data. It is formed of four conductive aluminum sheets 33a, 33b, 33c, and 33d that are pasted with a gap provided so as to be parallel to the electrode 22.
　したがって、実施の形態２においてアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄの間に形成される間隙は、背面基板２１のほぼ中央で交差する十字状の間隙６４になる。 Therefore, the gap formed between the aluminum sheets 33 a, 33 b, 33 c, and 33 d in the second embodiment is a cross-shaped gap 64 that intersects at almost the center of the back substrate 21.
　背面基板２１の背面電極３３の周囲には、実施の形態１と同様に、背面電極３３と重ならない位置に両面接着テープ４１が貼り付けられている。そして、この両面接着テープ４１によって、パネル１０はシャーシ５１に保持されている。この両面接着テープ４１は、実施の形態１で説明した両面接着テープ４１と同様のものであるので、説明を省略する。 A double-sided adhesive tape 41 is affixed around the back electrode 33 of the back substrate 21 at a position that does not overlap the back electrode 33, as in the first embodiment. The panel 10 is held by the chassis 51 by the double-sided adhesive tape 41. Since this double-sided adhesive tape 41 is the same as the double-sided adhesive tape 41 described in the first embodiment, the description thereof is omitted.
　なお、図１１には、ガスケット４３が背面電極３３に接触する位置を破線で示している。このガスケット４３によって、背面電極３３はシャーシ５１と電気的に接続されている。このガスケット４３は、実施の形態１で説明したガスケット４３と同様のものであるので、説明を省略する。 In FIG. 11, the position where the gasket 43 contacts the back electrode 33 is indicated by a broken line. The back electrode 33 is electrically connected to the chassis 51 by the gasket 43. Since the gasket 43 is the same as the gasket 43 described in the first embodiment, the description thereof is omitted.
　図１１に示したように、ガスケット４３は、背面基板２１の左上に貼り付けられたアルミニウムシート３３ａの左端の２箇所と、背面基板２１の右上に貼り付けられたアルミニウムシート３３ｂの右端の２箇所と、背面基板２１の左下に貼り付けられたアルミニウムシート３３ｃの左端の２箇所と、背面基板２１の右下に貼り付けられたアルミニウムシート３３ｄの右端の２箇所との合計８箇所に配置されている。 As shown in FIG. 11, the gasket 43 has two locations, the left end of the aluminum sheet 33 a attached to the upper left of the back substrate 21 and the right end of the aluminum sheet 33 b attached to the upper right of the back substrate 21. And two places at the left end of the aluminum sheet 33c attached to the lower left of the back substrate 21 and two places at the right end of the aluminum sheet 33d attached to the lower right of the rear substrate 21. Yes.
　そして、実施の形態１と同様に、ガスケット４３は、およそ０．９ｍｍの厚みに圧縮された状態で、背面電極３３（アルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄ）とシャーシ５１との間に挟まれる。こうして背面電極３３とシャーシ５１とが電気的に接続される。 As in the first embodiment, the gasket 43 is sandwiched between the back electrode 33 ( aluminum sheets 33a, 33b, 33c, and 33d) and the chassis 51 in a compressed state of about 0.9 mm. . Thus, the back electrode 33 and the chassis 51 are electrically connected.
　このように、不要輻射の水平偏波成分および垂直偏波成分の双方を抑制するためには、図１１に示したように、背面電極３３を４枚のアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄで構成し、背面基板２１のほぼ中央で交差する十字状の間隙６４がアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄの間に形成されるようにアルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄを背面基板２１に貼り付ければよい。 Thus, in order to suppress both the horizontally polarized wave component and the vertically polarized wave component of unwanted radiation, the back electrode 33 is made of four aluminum sheets 33a, 33b, 33c, and 33d as shown in FIG. The aluminum sheets 33a, 33b, 33c, and 33d are attached to the back substrate 21 so that a cross-shaped gap 64 that is configured and intersects at substantially the center of the back substrate 21 is formed between the aluminum sheets 33a, 33b, 33c, and 33d. You can attach it.
　この構成により、１枚のアルミニウムシートで背面電極３３（分割なし）を構成するときよりも、不要輻射の水平偏波成分および垂直偏波成分が約３（ｄＢμＶ／ｍ）低下することが確認された。 With this configuration, it is confirmed that the horizontal polarization component and the vertical polarization component of unnecessary radiation are reduced by about 3 (dBμV / m) as compared with the case where the back electrode 33 (no division) is configured with one aluminum sheet. It was.
　なお、本実施の形態では、４枚の導電性シート（アルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄ）によって、背面基板２１のほぼ中央で交差する十字状の間隙６４（表示電極対１４に平行な１本の間隙およびデータ電極２２に平行な１本の間隙からなる間隙６４）を設ける構成を説明したが、本発明は背面電極３３を構成する導電性シートの数が何ら４枚に限定されるものではない。表示電極対１４に平行な１本の間隙およびデータ電極２２に平行な１本の間隙を設けて背面基板２１のほぼ中央で交差する十字状の間隙を設けることができれば、５枚、あるいはそれ以上の導電性シートによって背面電極３３を構成してもよい。 In the present embodiment, a cross-shaped gap 64 (1 parallel to the display electrode pair 14) intersecting at almost the center of the back substrate 21 by four conductive sheets ( aluminum sheets 33 a, 33 b, 33 c, 33 d). In the above description, the gap 64 and the gap 64 including one gap parallel to the data electrode 22 have been described. However, in the present invention, the number of conductive sheets constituting the back electrode 33 is limited to four. is not. If one gap parallel to the display electrode pair 14 and one gap parallel to the data electrode 22 are provided, and a cross-shaped gap intersecting at the approximate center of the back substrate 21 can be provided, five or more The back electrode 33 may be formed of the conductive sheet.
　図１２は、本発明の実施の形態２におけるプラズマディスプレイ装置５０の導電性シートの形状の他の一例を示す図である。図１３は、本発明の実施の形態２におけるプラズマディスプレイ装置５０の導電性シートの形状のさらに他の一例を示す図である。図１４は、本発明の実施の形態２におけるプラズマディスプレイ装置５０の導電性シートの形状のさらに他の一例を示す図である。 FIG. 12 is a diagram showing another example of the shape of the conductive sheet of the plasma display device 50 according to the second embodiment of the present invention. FIG. 13 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device 50 in the second exemplary embodiment of the present invention. FIG. 14 is a diagram showing still another example of the shape of the conductive sheet of the plasma display device 50 according to the second embodiment of the present invention.
　例えば、図１２に示すように、アルミニウムシート３３ａ、３３ｂ、３３ｃ、３３ｄに代えて、アルミニウムシート３３ａの半分の大きさのアルミニウムシート３３ｅ、３３ｆを互いに直接的に接触した状態で背面基板２１に貼り付け、アルミニウムシート３３ｂの半分の大きさのアルミニウムシート３３ｇ、３３ｈを互いに直接的に接触した状態で背面基板２１に貼り付け、アルミニウムシート３３ｃの半分の大きさのアルミニウムシート３３ｉ、３３ｊを互いに直接的に接触した状態で背面基板２１に貼り付け、アルミニウムシート３３ｄの半分の大きさのアルミニウムシート３３ｋ、３３ｌを互いに直接的に接触した状態で背面基板２１に貼り付けて背面電極３３を構成し、背面基板２１のほぼ中央で交差する十字状の間隙６５（図１１に示した間隙とほぼ同形状の間隙）を設けてもよい。 For example, as shown in FIG. 12, instead of the aluminum sheets 33a, 33b, 33c, and 33d, aluminum sheets 33e and 33f that are half the size of the aluminum sheet 33a are attached to the back substrate 21 in a state of being in direct contact with each other. The aluminum sheets 33g and 33h, which are half the size of the aluminum sheet 33b, are attached to the back substrate 21 in direct contact with each other, and the aluminum sheets 33i and 33j that are half the size of the aluminum sheet 33c are directly attached to each other. Attached to the back substrate 21 in a state of being in contact with the aluminum sheet 33d, and affixed to the back substrate 21 in a state of being in direct contact with each other, aluminum sheets 33k and 33l that are half the size of the aluminum sheet 33d constitute the back electrode 33 A cross-shaped gap 65 (see FIG. Gap and may be provided substantially the same shape of the gap) shown in 1.
　あるいは、図１３に示すように、導電性シートの一部を十字状に切り抜いて、表示電極対１４に平行な間隙およびデータ電極２２に平行な間隙から成る十字状の間隙６６（図１１に示した間隙とほぼ同形状の間隙）を形成した１枚の導電性シート３３ｍによって背面電極３３を構成してもよい。図１３に示す構成では、あらかじめ十字状の間隙６６に沿った切れ目をアルミニウムシート３３ｍに入れておき、アルミニウムシート３３ｍを背面基板２１に貼り付けた後、切れ目に沿ってアルミニウムシート３３ｍの一部を剥ぎ取ることで背面基板２１のほぼ中央で交差する十字状の間隙６６を設けることができる。これにより、プラズマディスプレイ装置５０を製造するときの効率化を図ることができる。 Alternatively, as shown in FIG. 13, a part of the conductive sheet is cut out in a cross shape, and a cross-shaped gap 66 (shown in FIG. 11) composed of a gap parallel to the display electrode pair 14 and a gap parallel to the data electrode 22. The back electrode 33 may be constituted by a single conductive sheet 33m having a gap substantially the same shape as the gap. In the configuration shown in FIG. 13, a cut along the cross-shaped gap 66 is previously made in the aluminum sheet 33m, and after the aluminum sheet 33m is attached to the back substrate 21, a part of the aluminum sheet 33m is cut along the cut. By peeling off, a cross-shaped gap 66 that intersects at almost the center of the back substrate 21 can be provided. Thereby, the efficiency at the time of manufacturing the plasma display apparatus 50 can be achieved.
　あるいは、図１４に示すように、一部を切り抜いてデータ電極２２に平行な間隙を形成した２枚のアルミニウムシート３３ｎ、３３ｏを、アルミニウムシート３３ｎ、３３ｏの間に表示電極対１４に平行な１本の間隙を設けて背面基板２１に貼り付けて背面電極３３を構成してもよい。この構成によっても、表示電極対１４に平行な１本の間隙およびデータ電極２２に平行な１本の間隙が背面基板２１のほぼ中央で交差して十字状になる間隙６７（図１１に示した間隙とほぼ同形状の間隙）を設けることができる。図１４に示す構成においても、図１３に示した構成と同様に、アルミニウムシート３３ｎ、３３ｏを背面基板２１に貼り付けた後、切れ目に沿ってアルミニウムシート３３ｎ、３３ｏの一部を剥ぎ取ることで十字状の間隙６７を設けることができるので、プラズマディスプレイ装置５０を製造するときの効率化を図ることができる。 Alternatively, as shown in FIG. 14, two aluminum sheets 33 n and 33 o that are partially cut out to form a gap parallel to the data electrode 22 are replaced by one parallel to the display electrode pair 14 between the aluminum sheets 33 n and 33 o. The back electrode 33 may be formed by providing a gap between the books and attaching it to the back substrate 21. Also with this configuration, one gap parallel to the display electrode pair 14 and one gap parallel to the data electrode 22 intersect at almost the center of the back substrate 21 to form a cross shape 67 (shown in FIG. 11). A gap having substantially the same shape as the gap) can be provided. In the configuration shown in FIG. 14, similarly to the configuration shown in FIG. 13, after the aluminum sheets 33 n and 33 o are attached to the back substrate 21, a part of the aluminum sheets 33 n and 33 o is peeled off along the cut line. Since the cross-shaped gap 67 can be provided, the efficiency in manufacturing the plasma display device 50 can be improved.
　なお、本発明における実施の形態１および２では、間隙を表示電極対１４に平行（図面上での水平方向）に設ける構成、および間隙をデータ電極２２に平行（図面上での垂直方向）に設ける構成を説明したが、本発明はこの「平行」、「垂直」を厳密な意味での「平行」、「垂直」に限定するものではない。この「平行」、「垂直」は、略平行、略垂直を意味しており、本発明の目的とする効果が得られる範囲でのズレや歪み、誤差等は許容される。 In the first and second embodiments of the present invention, a configuration is provided in which the gap is parallel to the display electrode pair 14 (horizontal direction in the drawing), and the gap is parallel to the data electrode 22 (vertical direction in the drawing). Although the structure provided is described, the present invention is not limited to “parallel” and “vertical” in the strict sense of “parallel” and “vertical”. “Parallel” and “vertical” mean substantially parallel and substantially vertical, and deviation, distortion, error, and the like are allowed within a range in which the intended effect of the present invention can be obtained.
　なお、本発明における実施の形態では、１画素を赤、緑、青の３色の放電セルで構成する例を説明したが、１画素を４色あるいはそれ以上の色の放電セルで構成するパネルにおいても、本発明における実施の形態に示した構成を適用することは可能であり、同様の効果を得ることができる。 In the embodiment of the present invention, an example in which one pixel is constituted by discharge cells of three colors of red, green, and blue has been described. However, a panel in which one pixel is constituted by discharge cells of four colors or more. However, it is possible to apply the configuration shown in the embodiment of the present invention, and the same effect can be obtained.
　なお、本発明の実施の形態において示した具体的な数値は、画面サイズが４２インチ、表示電極対１４の数が１０２４のパネル１０の特性にもとづき設定したものであって、単に実施の形態における一例を示したものに過ぎない。本発明はこれらの数値に何ら限定されるものではなく、各数値はパネルの仕様やパネルの特性、およびプラズマディスプレイ装置の仕様等にあわせて最適に設定することが望ましい。また、これらの各数値は、上述した効果を得られる範囲でのばらつきを許容するものとする。 The specific numerical values shown in the embodiment of the present invention are set based on the characteristics of the panel 10 having a screen size of 42 inches and the number of display electrode pairs 14 of 1024. It is just an example. The present invention is not limited to these numerical values, and each numerical value is desirably set optimally in accordance with panel specifications, panel characteristics, plasma display device specifications, and the like. Each of these numerical values is allowed to vary within a range where the above-described effect can be obtained.
　本発明は、大型化、高画質化されたパネルを用いたプラズマディスプレイ装置であっても、パネルから発生する電磁波（不要輻射）を効果的に抑制することができるので、プラズマディスプレイ装置として有用である。 The present invention is useful as a plasma display device because it can effectively suppress electromagnetic waves (unwanted radiation) generated from the panel even in a plasma display device using a panel having a large size and high image quality. is there.
　１０　　パネル
　１１　　前面基板
　１２　　走査電極
　１３　　維持電極
　１４　　表示電極対
　１５，２３　　誘電体層
　１６　　保護層
　１８，１９，２８　　電極引出部
　２１　　背面基板
　２２　　データ電極
　２４　　隔壁
　２５　　蛍光体層
　３１，３３　　背面電極
　３１ａ，３１ｂ，３１ｃ，３１ｄ，３１ｅ，３１ｆ，３１ｇ，３３ａ，３３ｂ，３３ｃ，３３ｄ，３３ｅ，３３ｆ，３３ｇ，３３ｈ，３３ｉ，３３ｊ，３３ｋ，３３ｌ，３３ｍ，３３ｎ，３３ｏ　　アルミニウムシート
　４１　　両面接着テープ
　４３　　ガスケット
　４５　　ＦＰＣ
　５０　　プラズマディスプレイ装置
　５１　　シャーシ
　５３　　回路基板
　５４　　前面枠
　５５　　バックカバー
　６１，６２，６３，６４，６５，６６，６７　　間隙 DESCRIPTION OF SYMBOLS 10 Panel 11 Front substrate 12 Scan electrode 13 Sustain electrode 14 Display electrode pair 15, 23 Dielectric layer 16 Protective layer 18, 19, 28 Electrode extraction part 21 Back substrate 22 Data electrode 24 Partition 25 Phosphor layer 31, 33 Back electrode 31a , 31b, 31c, 31d, 31e, 31f, 31g, 33a, 33b, 33c, 33d, 33e, 33f, 33g, 33h, 33i, 33j, 33k, 33l, 33m, 33n, 33o Aluminum sheet 41 Double-sided adhesive tape 43 Gasket 45 FPC
50 Plasma display device 51 Chassis 53 Circuit board 54 Front frame 55 Back cover 61, 62, 63, 64, 65, 66, 67 Gap

Claims (7)

  1. 複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを前記表示電極対と前記データ電極とが交差するように対向配置したプラズマディスプレイパネルと、前記プラズマディスプレイパネルを駆動する駆動回路を搭載した回路基板と、前記プラズマディスプレイパネルおよび前記回路基板を保持するシャーシとを備えたプラズマディスプレイ装置であって、
    前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な間隙を設けて複数の導電性シートを設ける
    ことを特徴とするプラズマディスプレイ装置。     A plasma display panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs and the data electrodes intersect, and driving for driving the plasma display panel A plasma display device comprising a circuit board on which a circuit is mounted, and a chassis for holding the plasma display panel and the circuit board,
    A plasma display device, wherein a plurality of conductive sheets are provided on a surface of the back substrate opposite to a surface on which the data electrodes are formed, with a gap parallel to the display electrode pair.
  2. 前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な１本の間隙を設けて複数の導電性シートを設ける
    ことを特徴とする請求項１に記載のプラズマディスプレイ装置。     2. The conductive sheet according to claim 1, wherein a plurality of conductive sheets are provided on the surface of the back substrate opposite to the surface on which the data electrodes are formed, with a single gap parallel to the display electrode pair. Plasma display device.
  3. 複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを前記表示電極対と前記データ電極とが交差するように対向配置したプラズマディスプレイパネルと、前記プラズマディスプレイパネルを駆動する駆動回路を搭載した回路基板と、前記プラズマディスプレイパネルおよび前記回路基板を保持するシャーシとを備えたプラズマディスプレイ装置であって、
    前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な間隙と前記データ電極に平行な間隙とを十字状に設けて少なくとも４枚の導電性シートを設ける
    ことを特徴とするプラズマディスプレイ装置。     A plasma display panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs and the data electrodes intersect, and driving for driving the plasma display panel A plasma display device comprising a circuit board on which a circuit is mounted, and a chassis for holding the plasma display panel and the circuit board,
    On the surface of the back substrate opposite to the surface on which the data electrodes are formed, a gap parallel to the display electrode pair and a gap parallel to the data electrode are provided in a cross shape to form at least four conductive sheets. A plasma display device provided.
  4. 複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを前記表示電極対と前記データ電極とが交差するように対向配置したプラズマディスプレイパネルと、前記プラズマディスプレイパネルを駆動する駆動回路を搭載した回路基板と、前記プラズマディスプレイパネルおよび前記回路基板を保持するシャーシとを備えたプラズマディスプレイ装置であって、
    前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な間隙を形成した１枚の導電性シートを設ける
    ことを特徴とするプラズマディスプレイ装置。     A plasma display panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs and the data electrodes intersect, and driving for driving the plasma display panel A plasma display device comprising a circuit board on which a circuit is mounted, and a chassis for holding the plasma display panel and the circuit board,
    A plasma display device, wherein a conductive sheet having a gap parallel to the display electrode pair is provided on a surface of the back substrate opposite to a surface on which the data electrodes are formed.
  5. 前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な１本の間隙を設けた１枚の導電性シートを設ける
    ことを特徴とする請求項４に記載のプラズマディスプレイ装置。     5. The conductive sheet according to claim 4, wherein a conductive sheet having a single gap parallel to the display electrode pair is provided on a surface opposite to the surface on which the data electrode is formed on the back substrate. The plasma display device described.
  6. 複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを前記表示電極対と前記データ電極とが交差するように対向配置したプラズマディスプレイパネルと、前記プラズマディスプレイパネルを駆動する駆動回路を搭載した回路基板と、前記プラズマディスプレイパネルおよび前記回路基板を保持するシャーシとを備えたプラズマディスプレイ装置であって、
    前記背面基板における前記データ電極を形成した面とは反対側の面に、前記表示電極対に平行な間隙と前記データ電極に平行な間隙とを十字状に設けた１枚の導電性シートを設ける
    ことを特徴とするプラズマディスプレイ装置。     A plasma display panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs and the data electrodes intersect, and driving for driving the plasma display panel A plasma display device comprising a circuit board on which a circuit is mounted, and a chassis for holding the plasma display panel and the circuit board,
    On the surface of the back substrate opposite to the surface on which the data electrodes are formed, a conductive sheet is provided in which a gap parallel to the display electrode pair and a gap parallel to the data electrode are provided in a cross shape. A plasma display device.
  7. 複数の表示電極対を有する前面基板と複数のデータ電極を有する背面基板とを前記表示電極対と前記データ電極とが交差するように対向配置したプラズマディスプレイパネルと、前記プラズマディスプレイパネルを駆動する駆動回路を搭載した回路基板と、前記プラズマディスプレイパネルおよび前記回路基板を保持するシャーシとを備えたプラズマディスプレイ装置であって、
    前記背面基板における前記データ電極を形成した面とは反対側の面に、前記データ電極に平行な間隙を設けた導電性シートを２枚設け、２枚の前記導電性シートの間に前記表示電極対に平行な間隙を設け、前記表示電極対に平行な間隙と前記データ電極に平行な間隙とで十字状の間隙を設ける
    ことを特徴とするプラズマディスプレイ装置。     A plasma display panel in which a front substrate having a plurality of display electrode pairs and a rear substrate having a plurality of data electrodes are arranged to face each other so that the display electrode pairs and the data electrodes intersect, and driving for driving the plasma display panel A plasma display device comprising a circuit board on which a circuit is mounted, and a chassis for holding the plasma display panel and the circuit board,
    Two conductive sheets provided with a gap parallel to the data electrode are provided on the surface of the back substrate opposite to the surface on which the data electrode is formed, and the display electrode is provided between the two conductive sheets. A plasma display device, wherein a gap parallel to the pair is provided, and a cross-like gap is provided by a gap parallel to the display electrode pair and a gap parallel to the data electrode.
PCT/JP2012/003952 2011-06-22 2012-06-18 Plasma display device WO2012176421A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002215052A (en) * 2001-01-23 2002-07-31 Matsushita Electric Ind Co Ltd Display device
JP2006113537A (en) * 2004-10-12 2006-04-27 Samsung Sdi Co Ltd Plasma display apparatus
JP2006178477A (en) * 2004-12-23 2006-07-06 Lg Electronics Inc Flat display apparatus
JP2007171224A (en) * 2005-12-19 2007-07-05 Hitachi Ltd Planar display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002215052A (en) * 2001-01-23 2002-07-31 Matsushita Electric Ind Co Ltd Display device
JP2006113537A (en) * 2004-10-12 2006-04-27 Samsung Sdi Co Ltd Plasma display apparatus
JP2006178477A (en) * 2004-12-23 2006-07-06 Lg Electronics Inc Flat display apparatus
JP2007171224A (en) * 2005-12-19 2007-07-05 Hitachi Ltd Planar display device

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