WO2012049841A1 - プラズマディスプレイ装置の駆動方法およびプラズマディスプレイ装置 - Google Patents
プラズマディスプレイ装置の駆動方法およびプラズマディスプレイ装置 Download PDFInfo
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- WO2012049841A1 WO2012049841A1 PCT/JP2011/005700 JP2011005700W WO2012049841A1 WO 2012049841 A1 WO2012049841 A1 WO 2012049841A1 JP 2011005700 W JP2011005700 W JP 2011005700W WO 2012049841 A1 WO2012049841 A1 WO 2012049841A1
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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
- H01J11/10—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
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- 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
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
- G09G3/2029—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having non-binary weights
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- 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
- G09G3/2803—Display of gradations
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- 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
- G09G3/291—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
- G09G3/293—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 controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
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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
- H01J11/24—Sustain electrodes or scan electrodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0213—Addressing of scan or signal lines controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2044—Display of intermediate tones using dithering
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2059—Display of intermediate tones using error diffusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J2211/20—Constructional details
- H01J2211/22—Electrodes
- H01J2211/24—Sustain electrodes or scan electrodes
- H01J2211/245—Shape, e.g. cross section or pattern
Definitions
- the present invention relates to a driving method of a plasma display device using an AC surface discharge type plasma display panel and a plasma display device.
- 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 on the front glass substrate in parallel with each other.
- 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 at a partial pressure ratio of 5% is sealed, and a discharge cell is formed in 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, and gradation display is performed by causing each discharge cell to emit light or not emit light in each subfield.
- Each subfield has an initialization period, an address period, and a sustain period.
- an initialization waveform is applied to each scan electrode, and an initialization operation is performed to generate an initialization discharge in each discharge cell.
- wall charges necessary for the subsequent address operation are formed, and priming particles (excited particles for generating the discharge) for generating the address discharge stably are generated.
- the scan pulse is sequentially applied to the scan electrodes, and the address pulse is selectively applied to the data electrodes based on the image signal to be displayed.
- an address discharge is generated between the scan electrode and the data electrode of the discharge cell to emit light, and a wall charge is formed in the discharge cell (hereinafter, these operations are also collectively referred to as “address”). ).
- 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.
- a sustain discharge is generated in the discharge cell that has generated the address discharge, and the phosphor layer of the discharge cell emits light (hereinafter referred to as “lighting” that the discharge cell emits light by the sustain discharge, and “non-emitting”). Also written as “lit”.)
- each discharge cell is made to emit light with the luminance according 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.
- crosstalk a phenomenon may occur in which charges move from one discharge cell to the other between adjacent discharge cells.
- crosstalk a phenomenon in which charges move from one discharge cell to the other between adjacent discharge cells.
- crosstalk occurs, the wall charge in the discharge cell decreases. If a discharge cell in which the address operation becomes unstable due to a decrease in wall charges caused by crosstalk occurs, the image display quality may be deteriorated.
- Patent Document 1 In order to prevent deterioration of image display quality in a plasma display device, a technique for preventing crosstalk is disclosed (for example, refer to Patent Document 1).
- a technique for preventing crosstalk is disclosed (for example, refer to Patent Document 1).
- the specific gradation value is a gradation value having a light emission pattern in which light emission and non-light emission of the subfield are not interchanged in continuous subfields between continuous gradation values.
- the present invention comprises a plurality of display combination sets in which one field is composed of a plurality of subfields with luminance weights determined in advance, and a plurality of combinations of light emitting subfields and non-light emitting subfields are selected.
- a plasma display comprising a plurality of discharge cells each having a display electrode pair consisting of a scan electrode and a sustain electrode and data electrodes having different widths by controlling light emission / non-light emission of the discharge cell using a combination belonging to the display combination set This is a driving method of a plasma display device for displaying gradation on a panel.
- This driving method includes a first display combination set and a second display combination set in which the number of combinations of the light-emitting subfield and the non-light-emitting subfield is smaller than that of the first display combination set.
- the gradation is displayed on the plasma display panel using the display combination set.
- the first display combination set is used when converting the gradation value of the discharge cell having a relatively wide electrode width into image data. Further, when the gradation value of the discharge cell having a relatively narrow electrode width is converted into image data, the first display combination set or the second display combination set is used.
- the effect of suppressing the crosstalk can be enhanced, and when the crosstalk occurs, the influence of the crosstalk on the image displayed on the panel can be suppressed, and a high quality image can be displayed on the panel.
- the gradation value of the discharge cell having a relatively narrow electrode width is converted into image data
- the gradation value of at least one of the other discharge cells is converted. If is greater than or equal to a predetermined threshold value set in advance, it is desirable to use the second display combination set.
- the first display combination set and the second display combination set do not emit any subfields after the specific subfield unless the specific subfield emits light. In this manner, a combination of a light emitting subfield and a non-light emitting subfield is selected. Then, the number of specific subfields in the second display combination set is made larger than the number of specific subfields in the first display combination set.
- the color emitted from the discharge cell having a relatively narrow electrode width of the data electrode may be blue.
- the colors emitted from the discharge cells having relatively narrow electrode widths of the data electrodes may be blue and red.
- the present invention also provides a plasma display panel having a plurality of discharge cells each having a display electrode pair composed of a scan electrode and a sustain electrode and data electrodes having different widths, a number of sustain pulses corresponding to an address period and a luminance weight.
- a display comprising a plurality of subfields having a sustain period applied to a display electrode pair to drive a plasma display panel by selecting a plurality of combinations of light-emitting subfields and non-light-emitting subfields.
- a driving circuit that displays gray levels by controlling light emission / non-light emission of the discharge cells using combinations belonging to the display combination set.
- the drive circuit includes a first display combination set and a second display combination in which the number of combinations of the light-emitting subfield and the non-light-emitting subfield is smaller than that of the first display combination set.
- the gray scale is displayed on the plasma display panel using the display combination set having the combination set.
- the first display combination set is used when converting the gradation value of the discharge cell having a relatively wide electrode width into image data. Further, when the gradation value of the discharge cell having a relatively narrow electrode width is converted into image data, the first display combination set or the second display combination set is used.
- the effect of suppressing the crosstalk can be enhanced, and when the crosstalk occurs, the influence of the crosstalk on the image displayed on the panel can be suppressed, and a high quality image can be displayed on the panel.
- 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 an enlarged schematic view showing the arrangement of the discharge cells and data electrodes of the panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 4 is a diagram schematically showing drive voltage waveforms applied to each electrode of the panel used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 5A is a diagram showing an example of a first coding table used in the plasma display device according to Embodiment 1 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
- FIG. 5B is a diagram showing an example of a second coding table used in the plasma display device according to Embodiment 1 of the present invention.
- FIG. 6 is a diagram schematically showing an example of a circuit block constituting the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 7 is a diagram schematically showing a configuration example of an image signal processing circuit used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 8 is a diagram showing the minimum value of the write pulse voltage Vd necessary for the write operation in each subfield.
- FIG. 9A is a diagram showing an example of a light emission pattern in which the address operation in the blue discharge cell tends to become unstable in the plasma display device 40 according to the first exemplary embodiment of the present invention.
- FIG. 9A is a diagram showing an example of a light emission pattern in which the address operation in the blue discharge cell tends to become unstable in the plasma display device 40 according to the first exemplary embodiment of the present invention.
- FIG. 9B is a diagram showing another example of the light emission pattern in which the address operation in the blue discharge cell tends to become unstable in the plasma display device 40 according to the first exemplary embodiment of the present invention.
- FIG. 10 is an enlarged schematic view showing the arrangement of the discharge cells and data electrodes of the panel used in the plasma display device in accordance with the second exemplary embodiment of the present invention.
- FIG. 11 is a diagram schematically showing a configuration example of an image signal processing circuit used in the plasma display device according to the second 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 24 each including a scanning electrode 22 and a sustaining electrode 23 are formed on a glass front substrate 21.
- a dielectric layer 25 is formed so as to cover the scan electrode 22 and the sustain electrode 23, and a protective layer 26 is formed on the dielectric layer 25.
- This protective layer 26 has been used as a panel material in order to lower the discharge starting voltage in the discharge cell.
- the secondary layer 26 has a large secondary electron emission coefficient and is durable. It is made of a material mainly composed of magnesium oxide (MgO).
- a plurality of data electrodes 32 are formed on the rear substrate 31, a dielectric layer 33 is formed so as to cover the data electrodes 32, and a grid-like partition wall 34 is formed thereon.
- a phosphor layer 35R that emits red (R)
- a phosphor layer 35G that emits green (G)
- a phosphor layer 35B that emits blue (B).
- the phosphor layer 35R, the phosphor layer 35G, and the phosphor layer 35B are collectively referred to as a phosphor layer 35.
- the front substrate 21 and the rear substrate 31 are arranged to face each other so that the display electrode pair 24 and the data electrode 32 intersect with each other with a minute discharge space interposed therebetween. And the outer peripheral part is sealed with sealing materials, such as glass frit. Then, for example, a mixed gas of neon and xenon is sealed in the discharge space inside as a discharge gas.
- the discharge space is partitioned into a plurality of sections by partition walls 34, and discharge cells are formed at the intersections between the display electrode pairs 24 and the data electrodes 32.
- discharge is generated in these discharge cells, and the phosphor layer 35 of the discharge cells emits light (lights the discharge cells), thereby displaying a color image on the panel 10.
- one pixel is constituted by three consecutive discharge cells arranged in the direction in which the display electrode pair 24 extends.
- the three discharge cells are a discharge cell having a phosphor layer 35R and emitting red (R) (red discharge cell), and a discharge cell having a phosphor layer 35G and emitting green (G) (green). And a discharge cell having a phosphor layer 35B and emitting blue (B) light (blue discharge cell).
- 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.
- 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 SC1 to SCn (scan electrode 22 in FIG. 1) extended in the horizontal direction (row direction) and n sustain electrodes SU1 to SUn (sustain electrodes in FIG. 1). 23) are arranged, and m data electrodes D1 to Dm (data electrodes 32 in FIG. 1) extending in the vertical direction (column direction) are arranged.
- a green phosphor is applied as a phosphor layer 35G to a discharge cell having a blue color
- a blue phosphor is applied as a phosphor layer 35B to a discharge cell having a data electrode Dp + 2.
- FIG. 3 is an enlarged schematic view showing the arrangement of the discharge cells and data electrodes of the panel used in the plasma display device according to the first exemplary embodiment of the present invention.
- the electrode width of the data electrode 32 constituting the red discharge cell and the green discharge cell is relatively wide, and the data electrode constituting the blue discharge cell.
- the electrode width of 32 is relatively narrow. As described above, the reason why the electrode width of the data electrode 32 is different depending on the emission color of the discharge cell will be described later.
- the electrode width of the data electrode 32 constituting the red discharge cell and the green discharge cell is about 90 ⁇ m, and the electrode width of the data electrode 32 constituting the blue discharge cell is about 70 ⁇ m. .
- first color and “second color” are set based on the electrode width of the data electrode 32.
- the color emitted from the discharge cell having the relatively wide electrode width of the data electrode 32 is defined as “first color”
- the color emitted from the discharge cell having the relatively narrow electrode width of the data electrode 32 is defined as “color”.
- the plasma display device in the present embodiment drives the panel 10 by the subfield method.
- the subfield method one field is divided into a plurality of subfields on the time axis, and a luminance weight is set for each subfield. Therefore, each field has a plurality of subfields.
- Each subfield has an initialization period, an address period, and a sustain period.
- one field is composed of six subfields (subfield SF1, subfield SF2, subfield SF3, subfield SF4, subfield SF5, subfield SF6), and subfield SF1 to subfield
- subfield SF1 subfield SF1 to subfield
- each subfield of SF6 has a luminance weight of (1, 2, 4, 8, 16, 32) will be described.
- the number of subfields constituting one field, the luminance weight of each subfield, and the like are not limited to the above numerical values.
- one field is composed of 10 subfields (subfield SF1,..., Subfield SF10), and each subfield from subfield SF1 to subfield SF10 is (1, 2, 3, 6, 11, It is desirable to appropriately set the configuration of the subfield according to the specifications of the plasma display device, such as having luminance weights of 18, 30, 44, 60, 81).
- an initializing operation is performed in which initializing discharge is generated in the discharge cells and wall charges necessary for the address discharge in the subsequent address period are formed on each electrode.
- a scan pulse is applied to the scan electrode 22 and an address pulse is selectively applied to the data electrode 32 to selectively generate an address discharge in the discharge cells to emit light. Then, an address operation is performed to form wall charges in the discharge cells for generating a sustain discharge in the subsequent sustain period.
- the sustain pulses of the number obtained by multiplying the luminance weight set in each subfield by a predetermined proportional constant are alternately applied to the scan electrode 22 and the sustain electrode 23, and the address discharge was generated in the immediately preceding address period.
- a sustain discharge is generated in the discharge cell, and a sustain operation for emitting light from the discharge cell is performed.
- This proportionality constant is a luminance multiple.
- the luminance weight represents a ratio of the luminance magnitudes displayed in each subfield, and the number of sustain pulses corresponding to the luminance weight is generated in the sustain period in each subfield. Therefore, for example, the subfield with the luminance weight “8” emits light with a luminance about eight times that of the subfield with the luminance weight “1”, and emits light with about four times the luminance of the subfield with the luminance weight “2”.
- the sustain pulse is applied to the scan electrode 22 and the sustain electrode 23 four times in the sustain period of the subfield having the luminance weight “2”. Therefore, the number of sustain pulses generated in the sustain period is 8.
- each subfield is selectively emitted to display various gradation values and display the image on the panel 10. Can be displayed.
- the initialization operation includes all-cell initialization operation that generates an initializing discharge in the discharge cells regardless of the operation of the immediately preceding subfield, and the address discharge is generated in the immediately preceding subfield address period and is maintained in the sustain period.
- an ascending rising waveform voltage and a descending falling waveform voltage are applied to the scan electrode 22 to generate an initializing discharge in all the discharge cells in the image display region. Then, among all the subfields, the all-cell initialization operation is performed in the initialization period of one subfield, and the selective initialization operation is performed in the initialization period of the other subfield.
- the initialization period for performing the all-cell initialization operation is referred to as “all-cell initialization period”, and the subfield having the all-cell initialization period is referred to as “all-cell initialization subfield”.
- An initialization period for performing the selective initialization operation is referred to as “selective initialization period”, and a subfield having the selective initialization period is referred to as “selective initialization subfield”.
- the first subfield (subfield SF1) of each field is an all-cell initializing subfield, and the other subfields are selective initializing subfields.
- the initializing discharge is generated in all the discharge cells at least once in one field, the addressing operation after the initializing operation for all the cells can be stabilized. Further, light emission not related to image display is only light emission due to discharge in the all-cell initializing operation in the subfield SF1. Therefore, the black luminance that is the luminance of the black display region where no sustain discharge occurs is only weak light emission in the all-cell initialization operation, and an image with high contrast can be displayed on the panel 10.
- the number of subfields constituting one field and the luminance weight of each subfield are not limited to the above-described numerical values.
- the structure which switches a subfield structure based on an image signal etc. may be sufficient.
- FIG. 4 is a diagram schematically showing drive voltage waveforms applied to the respective electrodes of panel 10 used in the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 4 shows scan electrode SC1 that performs the address operation first in the address period, scan electrode SCn that performs the address operation last in the address period (for example, scan electrode SC1080), sustain electrode SU1 to sustain electrode SUn, and data electrode D1.
- FIG. 6 shows driving voltage waveforms applied to each of the data electrodes Dm.
- Scan electrode SCi, sustain electrode SUi, and data electrode Dk in the following represent electrodes selected based on image data (data indicating light emission / non-light emission for each subfield) from among the electrodes.
- FIG. 4 shows driving voltage waveforms in three subfields, that is, subfield SF1, subfield SF2, and subfield SF3.
- the subfield SF1 is a subfield for performing an all-cell initialization operation
- the subfield SF2 and the subfield SF3 are subfields for performing a selective initialization operation. Therefore, the waveform shape of the drive voltage applied to the scan electrode 22 in the initialization period differs between the subfield SF1, the subfield SF2, and the subfield SF3.
- the drive voltage waveforms in the other subfields are substantially the same as the drive voltage waveforms in subfield SF2 and subfield SF3, except that the number of sustain pulses generated in the sustain period is different.
- the number of subfields constituting one field and the luminance weight of each subfield are not limited to the above values.
- subfield SF1 which is an all-cell initialization subfield
- the voltage 0 (V) is applied to the data electrode D1 to the data electrode Dm and the sustain electrode SU1 to the sustain electrode SUn.
- Voltage Vi1 is applied to scan electrode SC1 through scan electrode SCn after voltage 0 (V) is applied, and an upward ramp waveform voltage (ramp voltage) that gradually rises from voltage Vi1 to voltage Vi2 is applied.
- Voltage Vi1 is set to a voltage lower than the discharge start voltage with respect to sustain electrode SU1 through sustain electrode SUn, and voltage Vi2 is set to a voltage exceeding the discharge start voltage.
- While this ramp voltage is applied to scan electrode SC1 through scan electrode SCn, data between scan electrode SC1 through scan electrode SCn and sustain electrode SU1 through sustain electrode SUn, and scan electrode SC1 through scan electrode SCn and data of each discharge cell.
- a weak initializing discharge is generated between the electrode D1 and the data electrode Dm. Then, the negative wall voltage on scan electrode SC1 through scan electrode SCn and the positive wall voltage on sustain electrode SU1 through sustain electrode SUn are weakened, and the positive wall voltage on data electrode D1 through data electrode Dm is used for the write operation. It is adjusted to a suitable value.
- voltage Ve2 is applied to sustain electrode SU1 through sustain electrode SUn
- voltage 0 (V) is applied to data electrode D1 through data electrode Dm
- scan electrode SC1 through scan electrode SCn are applied. Applies a voltage Vc.
- a negative scan pulse having a negative voltage Va is applied to the scan electrode SC1 in the first row where the address operation is performed first.
- this voltage Va is also referred to as “scanning pulse voltage”.
- a positive address pulse of a positive voltage Vd is applied to the data electrode Dk of the discharge cell that should emit light in the first row of the data electrodes D1 to Dm.
- this voltage Vd is also referred to as “write pulse voltage”.
- sustain electrode SU1 in the region intersecting data electrode Dk is induced by the discharge generated between data electrode Dk and scan electrode SC1. Discharge also occurs between scan electrode SC1 and scan electrode SC1.
- an address discharge is generated in the discharge cell (discharge cell to emit light) to which the scan pulse voltage Va and the address pulse voltage Vd are simultaneously applied, a positive wall voltage is accumulated on the scan electrode SC1, and the sustain electrode SU1 is accumulated. And a negative wall voltage is also accumulated on the data electrode Dk.
- the scan pulse voltage Va is applied to the scan electrode SC2 in the second row
- the address pulse voltage Vd is applied to the data electrode Dk corresponding to the discharge cell to emit light in the second row, and the discharge cell in the second row.
- the write operation is performed.
- a similar address operation is sequentially performed in the order of scan electrode SC3, scan electrode SC4,..., Scan electrode SCn until reaching the discharge cell in the n-th row, and the address period of subfield SF1 is completed.
- FIG. 4 shows a configuration in which voltage Ve1 is applied to sustain electrode SU1 through sustain electrode SUn in the latter half of the initialization period, and voltage Ve2 is applied in the address period, but this voltage Ve1 and voltage Ve2 are applied. May be equal to each other.
- the voltage difference between the scan electrode SCi and the sustain electrode SUi exceeds the discharge start voltage, and the sustain discharge is generated. And the fluorescent substance layer 35 light-emits with the ultraviolet-ray which generate
- V voltage 0 (V) is applied to scan electrode SC1 through scan electrode SCn
- sustain pulse voltage Vs is applied to sustain electrode SU1 through sustain electrode SUn.
- a sustain discharge occurs again, a negative wall voltage is accumulated on sustain electrode SUi, and a positive wall voltage is accumulated on scan electrode SCi.
- sustain pulses of the number obtained by multiplying the luminance weight by a predetermined luminance multiple are alternately applied to scan electrode SC1 through scan electrode SCn and sustain electrode SU1 through sustain electrode SUn.
- the discharge cells that have generated the address discharge in the address period emit light with a luminance corresponding to the luminance weight.
- voltage 0 (V) is applied to scan electrode SC1 through scan electrode SCn while voltage 0 (V) is applied to sustain electrode SU1 through sustain electrode SUn and data electrode D1 through data electrode Dm.
- a ramp waveform voltage (ramp voltage) that gradually rises from V to voltage Vr is applied.
- subfield SF2 which is a selective initialization subfield
- voltage Ve1 is applied to sustain electrode SU1 through sustain electrode SUn, and voltage 0 (V) is applied to data electrode D1 through data electrode Dm.
- a scan waveform SC1 to scan electrode SCn is applied with a ramp waveform voltage (ramp voltage) that gently falls from a voltage lower than the discharge start voltage (eg, voltage 0 (V)) toward negative voltage Vi4.
- Voltage Vi4 is set to a voltage exceeding the discharge start voltage with respect to sustain electrode SU1 through sustain electrode SUn.
- a weak initializing discharge occurs in a discharge cell that has generated a sustain discharge in the sustain period of the immediately preceding subfield (subfield SF1 in FIG. 4). To do.
- the initializing discharge weakens the wall voltage on scan electrode SCi and sustain electrode SUi. Further, an excessive portion of the wall voltage accumulated on the data electrode Dk is discharged, and the wall voltage on the data electrode Dk is adjusted to a wall voltage suitable for the write operation.
- the initializing operation in the subfield SF2 is a selective initializing operation in which the initializing discharge is selectively generated in the discharge cells that have performed the addressing operation in the address period of the immediately preceding subfield.
- a drive voltage waveform similar to that in the address period of the subfield SF1 is applied to each electrode, and an address operation for accumulating wall voltage on each electrode of the discharge cell to emit light is performed.
- the number of sustain pulses corresponding to the luminance weight is alternately applied to scan electrode SC1 through scan electrode SCn and sustain electrode SU1 through sustain electrode SUn.
- a sustain discharge is generated in the discharge cell that has generated the address discharge.
- each subfield after subfield SF3 In the initialization period and address period of each subfield after subfield SF3, the same drive voltage waveform as that in the initialization period and address period of subfield SF2 is applied to each electrode. In the sustain period of each subfield after subfield SF3, the drive voltage waveform similar to that of subfield SF2 is applied to each electrode except for the number of sustain pulses generated in the sustain period.
- one field is composed of a plurality of subfields in which luminance weights are set in advance. Then, by selectively emitting light in the subfield according to the magnitude of the gradation value displayed on the discharge cell, each discharge cell is caused to emit light with brightness according to the gradation value, and an image is displayed on the panel 10. .
- the subfield to emit light is also referred to as “lighting subfield”
- the non-lighting subfield is also referred to as “nonlighting subfield”.
- coding a combination of a lighting subfield and a non-lighting subfield in one field.
- coding a plurality of codings (display codings) used for displaying gradations are selected from the plurality of codings, and a display combination set is created.
- the display combination set is referred to as a “coding table”.
- the gradation value when displaying black (the gradation value when no sustain discharge occurs) is assumed to be “0”.
- a gradation value corresponding to the luminance weight “N” is expressed as a gradation value “N”.
- the gradation value displayed by the discharge cells that emit light only in the subfield SF1 having the luminance weight “1” is the gradation value “1”.
- the plasma display device in this embodiment includes a plurality of coding tables with different numbers of codings.
- the plasma display device in the present embodiment includes a plurality of coding tables having different numbers of gradations that can be displayed on panel 10.
- FIG. 5A is a diagram showing an example of a first coding table used in the plasma display device according to Embodiment 1 of the present invention.
- FIG. 5B is a diagram showing an example of a second coding table used in the plasma display device according to Embodiment 1 of the present invention.
- the first coding table is a “first display combination set”, and the second coding table is a “second display combination set”.
- each of the subfields SF1 to SF6 has luminance weights “1”, “2”, “4”, “8”, “16”, and “32”, respectively. Have.
- the light-emitting subfield is indicated by “ ⁇ ”
- the non-light-emitting subfield is indicated by a blank
- the leftmost column indicates the gradation value to be displayed in each coding.
- the subfield SF1 and the subfield SF2 emit light in the discharge cell displaying the gradation value “3”.
- the subfield SF1, the subfield SF2, the subfield SF3, and the subfield SF5 emit light.
- the first coding table shown in FIG. 5A is a set of codings having a rule that “subfield SF1 always emits light in a discharge cell displaying gradation value“ 1 ”or higher”.
- This rule can be rephrased as “a discharge cell that did not emit light in the subfield SF1 does not emit light after the subfield SF2”.
- this rule can be paraphrased as “subfield SF1 always emits light in a discharge cell in which subfield SF2 emits light”.
- the first coding table combines the light-emitting subfield and the non-light-emitting subfield so that the subfield after the specific subfield does not emit light unless the specific subfield emits light.
- the specific subfield in the coding table is the subfield SF1.
- the subfield SF1 always emits light in the discharge cell displaying the gradation value “1” or more. According to this rule, as shown in FIG. 5A, 33 gradation values can be displayed in six subfields from subfield SF1 to subfield SF6.
- the second coding table shown in FIG. 5B shows that the subfield SF1 always emits light in the discharge cells that display the gradation value “1” or more, and the subfield SF2 always displays in the discharge cells that display the gradation value “3” or more.
- the rule is that “discharge cells that did not emit light in subfield SF1 do not emit light after subfield SF2, and discharge cells that did not emit light in subfield SF2 do not emit light after subfield SF3, and emit light in subfield SF3.
- the discharge cells that have not been emitted do not emit light even after the subfield SF4.
- this rule can be rephrased as “subfield SF1, subfield SF2, and subfield SF3 always emit light in the discharge cell in which subfield SF4 emits light”.
- the second coding table combines the light emitting subfield and the non-light emitting subfield so that the subfields after the specific subfield do not emit light unless the specific subfield emits light.
- Specific subfields in the coding table are subfield SF1, subfield SF, and subfield SF3. Accordingly, the number of specific subfields in the second coding table is greater than the number of specific subfields in the first coding table.
- the subfield SF1, the subfield SF2, and the subfield SF3 always emit light in the discharge cells that display the gradation value “7” or more.
- eleven gradation values can be displayed in six subfields from subfield SF1 to subfield SF6.
- a non-light emitting subfield is generated between the light emitting subfield and the light emitting subfield among the 33 gradation values that can be displayed on the panel 10. There are 26 gradation values.
- a non-light emitting subfield is generated between the light emitting subfield and the light emitting subfield. There are four gradation values.
- the subfields that emit light are continuous than when the gradation is displayed on the panel 10 using the first coding table.
- the probability of occurrence will increase. Therefore, when displaying the gradation on the panel 10 using the second coding table, the writing operation can be performed more stably.
- each of the first coding table and the second coding table is rephrased as “a discharge cell that does not emit light in a specific subfield in one field does not emit light in a subfield subsequent to the specific subfield”. Can do.
- the specific subfield is subfield SF1
- the specific subfield is subfield SF2, and subfield SF3.
- the number of gradation values that can be displayed on the panel 10 is smaller in the second coding table having a large number of specific subfields than in the first coding table having a small number of specific subfields.
- the image signal is converted into image data while switching between the first coding table shown in FIG. 5A and the second coding table shown in FIG. 5B based on the image signal.
- FIG. 6 is a diagram schematically showing an example of a circuit block constituting the plasma display device 40 according to the first embodiment of the present invention.
- the plasma display device 40 shown in the present embodiment includes a panel 10 and a drive circuit that drives the panel 10.
- the drive circuit includes an image signal processing circuit 41, a data electrode drive circuit 42, a scan electrode drive circuit 43, a sustain electrode drive circuit 44, a timing generation circuit 45, and a power supply circuit (not shown) that supplies necessary power to each circuit block. It has.
- the image signal processing circuit 41 receives a red image signal, a green image signal, and a blue image signal. Then, the image signal processing circuit 41 assigns a gradation value to each discharge cell based on the input image signal, and the gradation value is used as image data indicating light emission / non-light emission for each subfield (light emission / non-light emission). Is converted to data corresponding to digital signals “1” and “0”). At this time, the image signal processing circuit 41 generates image data based on the first coding table or the second coding table described above.
- the image signal processing circuit 41 uses the red image data, the green image signal, the blue image signal based on the first coding table or the second coding table based on the first coding table or the second coding table. Converted to image data and output. For example, the image signal processing circuit 41 outputs the image data “110000” when displaying the gradation value “3”, and outputs the image data “11110” when displaying the gradation value “23”. .
- the image data is arranged in the order of subfield SF1, subfield SF2, subfield SF3, subfield SF4, subfield SF5, and subfield SF6.
- the timing generation circuit 45 generates various timing signals for controlling the operation of each circuit block based on the horizontal synchronization signal and the vertical synchronization signal.
- the generated timing signal is supplied to each circuit block (data electrode drive circuit 42, scan electrode drive circuit 43, sustain electrode drive circuit 44, image signal processing circuit 41, etc.).
- the data electrode drive circuit 42 generates address pulses corresponding to the data electrodes D1 to Dm based on the image data of each color output from the image signal processing circuit 41 and the timing signal supplied from the timing generation circuit 45. . Then, the data electrode driving circuit 42 applies the address pulse to the data electrodes D1 to Dm during the address period.
- Scan electrode drive circuit 43 includes an initialization waveform generation circuit, a sustain pulse generation circuit, and a scan pulse generation circuit (not shown in FIG. 6), and generates a drive voltage waveform based on a timing signal supplied from timing generation circuit 45. It is prepared and applied to each of scan electrode SC1 to scan electrode SCn.
- the initialization waveform generation circuit generates an initialization waveform to be applied to scan electrode SC1 through scan electrode SCn during the initialization period based on the timing signal.
- the sustain pulse generating circuit generates a sustain pulse to be applied to scan electrode SC1 through scan electrode SCn during the sustain period based on the timing signal.
- the scan pulse generating circuit includes a plurality of scan electrode driving ICs (scan ICs), and generates scan pulses to be applied to scan electrode SC1 through scan electrode SCn during the address period based on the timing signal.
- Sustain electrode drive circuit 44 includes a sustain pulse generation circuit and a circuit (not shown in FIG. 6) for generating voltage Ve1 and voltage Ve2, and generates a drive voltage waveform based on a timing signal supplied from timing generation circuit 45. It is prepared and applied to each of sustain electrode SU1 through sustain electrode SUn. In the sustain period, a sustain pulse is generated based on the timing signal and applied to sustain electrode SU1 through sustain electrode SUn.
- FIG. 7 is a diagram schematically showing a configuration example of the image signal processing circuit 41 used in the plasma display device 40 according to Embodiment 1 of the present invention.
- FIG. 7 shows only circuit blocks related to each operation shown in this embodiment, and other circuit blocks are omitted.
- the coding table is simply referred to as “table”, the first coding table is referred to as “first table”, and the second coding table is referred to as “second table”.
- the image signal processing circuit 41 stores a first table corresponding to a red image signal (hereinafter, referred to as “first table 52R”) and a first table corresponding to a green image signal.
- first table 52G storage device
- first table 52B storage device
- second table 53B blue image signal Storage device
- data conversion unit 54R corresponding to a red image signal
- data conversion unit 54G corresponding to a green image signal
- a data conversion unit 54B corresponding to the image signal
- a table determination unit 55 a selector 56B.
- Each storage device that stores the table can arbitrarily read the coding data stored therein according to the gradation value.
- the image signal processing circuit 41 includes a gradation value conversion unit corresponding to a red image signal, a gradation value conversion unit corresponding to a green image signal, and a blue image signal. And a tone value conversion unit corresponding to.
- the gradation value conversion unit corresponding to the red image signal displays the image corresponding to the red image signal on the panel 10, and performs necessary signal processing, for example, pixel number conversion or gamma according to the number of pixels of the panel 10. Signal processing such as correction is performed on the red image signal. Then, the red image signal subjected to the signal processing is converted into a red gradation value.
- the gradation value conversion unit corresponding to the green image signal performs necessary signal processing on the green image signal and converts it to a green gradation value, as described above.
- the gradation value conversion unit corresponding to the blue image signal performs necessary signal processing on the blue image signal and converts it into a blue gradation value, as described above.
- the gradation value conversion unit corresponding to the red image signal, the gradation value conversion unit corresponding to the green image signal, and the gradation value conversion unit corresponding to the blue image signal are red.
- the tone values, the green tone values, and the blue tone values are output in synchronism with each other so that they are output simultaneously.
- the data converter 54R reads the coding data from the first table 52R based on the red tone value output from the tone value converter corresponding to the red image signal.
- the read data is output as red image data.
- the data conversion unit 54G reads coding data from the first table 52G based on the green gradation value output from the gradation value conversion unit corresponding to the green image signal. Then, the read data is output as green image data.
- the table determination unit 55 includes a comparator 61, a comparator 62, and an OR gate 63.
- the comparator 61 compares the red gradation value output from the gradation value conversion unit corresponding to the red image signal with a predetermined threshold value.
- the predetermined threshold is set to “3”, for example.
- the comparator 61 outputs an “H” level if the red tone value is equal to or greater than a predetermined threshold value (for example, the red tone value is “3” or greater), and the red tone value is equal to the predetermined value. If it is less than the threshold value (for example, the red gradation value is less than “3”), the “L” level is output.
- the comparator 62 compares the green gradation value output from the gradation value conversion unit corresponding to the green image signal with a predetermined threshold value.
- the predetermined threshold is set to “3”, for example, as described above. Then, the comparator 62 outputs an “H” level if the green tone value is equal to or greater than a predetermined threshold value (for example, the green tone value is “3” or greater), and the green tone value is predetermined. If it is less than the threshold value (for example, the green gradation value is less than “3”), the “L” level is output.
- OR gate 63 performs an OR operation on the output of comparator 61 and the output of comparator 62 and outputs the result. That is, the OR gate 63 outputs the “L” level when the output of the comparator 61 and the output of the comparator 62 are both “L” level, and outputs the “H” level otherwise.
- the OR gate 63 has at least one of the red gradation value and the green gradation value equal to or higher than a predetermined threshold value (for example, a gradation value “3” or higher). Outputs “H” level. Then, the output of the OR gate 63 is input to the selector 56B as the output of the table determination unit 55.
- a predetermined threshold value for example, a gradation value “3” or higher.
- the selector 56B selects one of the first table 52B and the second table 53B based on the signal output from the table determination unit 55.
- the selector 56B in the present embodiment selects the second table 53B if the output of the table determination unit 55 is “H” level, and selects the first table 52B if the output of the table determination unit 55 is “L” level. select.
- the data converter 54B reads the coding data from the table selected by the selector 56B based on the blue tone value output from the tone value converter corresponding to the blue image signal. For example, if the first table 52B is selected in the selector 56B, the coding data is read from the first table 52B based on the blue tone value output from the tone value conversion unit. If the second table 53B is selected in the selector 56B, the coding data is read from the second table 53B based on the blue tone value output from the tone value converter. Then, the read data is output as blue image data.
- the data conversion unit 54B determines that at least one of the red gradation value and the green gradation value is equal to or greater than a predetermined threshold (for example, the gradation value “3” or more). Based on the second table, the blue gradation value is converted into blue image data. Further, the data conversion unit 54B determines that the blue floor is based on the first table if both the red gradation value and the green gradation value are less than a predetermined threshold value (for example, less than the gradation value “3”). Convert key values to blue image data.
- a predetermined threshold for example, the gradation value “3” or more
- FIG. 8 is a diagram showing the minimum value of the write pulse voltage Vd necessary for the write operation in each subfield.
- the vertical axis represents the minimum value of the write pulse voltage Vd necessary for a stable write operation
- the horizontal axis represents a subfield.
- FIG. 8 shows the minimum value of the address pulse voltage Vd necessary for the address operation for each subfield in each of the red discharge cell, the green discharge cell, and the blue discharge cell.
- the crosstalk can be quantified by measuring the minimum voltage value of the write pulse voltage Vd necessary for the write operation.
- the graph shown in FIG. 8 summarizes the results measured as follows. First, of the three discharge cells constituting one pixel, one discharge cell (target discharge cell) of interest in a specific subfield is not caused to emit light, and the other two discharge cells are caused to emit light. Next, the minimum value of the address pulse voltage necessary for addressing the discharge cell of interest in the next subfield is measured.
- FIG. 8 shows the measurement results after subfield SF2. Further, the graph shown in FIG. 8 shows the crosstalk characteristics of the red, green, and blue discharge cells of the panel 10.
- the characteristic indicated by AA in FIG. 8 represents the measurement result when the target discharge cell is a blue discharge cell, and the characteristic indicated by BB in FIG. 8 indicates that the target discharge cell is a red discharge cell. 8 represents the measurement result, and the characteristic indicated by CC in FIG. 8 represents the measurement result when the target discharge cell is a green discharge cell.
- the lowest value of the address pulse voltage Vd in the blue discharge cell is higher than that in the red discharge cell and the green discharge cell. From this result, it is considered that the wall charges in the blue discharge cells are more likely to decrease than in the other discharge cells, and that the crosstalk in the blue discharge cells is generated more than the crosstalk in the other discharge cells.
- the electrode width of data electrode 32 constituting the red discharge cell and the green discharge cell is relatively wide, and the data electrode constituting the blue discharge cell.
- the electrode width of 32 is relatively narrow.
- the address discharge can be generated more stably.
- the influence of the generated address discharge on the adjacent discharge cells (for example, the influence on the wall charges) becomes relatively large.
- the address discharge tends to become unstable as compared with the discharge cell in which the electrode width of the data electrode 32 is widened.
- the influence of the generated address discharge on adjacent discharge cells is relatively small.
- the address discharge can be generated more stably, and the minimum value of the address pulse voltage Vd necessary for the address operation is also relative. Can be lowered.
- the address discharge tends to become unstable compared to the red discharge cell and the green discharge cell. Therefore, the minimum value of the write pulse voltage Vd necessary for the write operation is relatively high.
- the influence of the address discharge generated in the blue discharge cell on the adjacent red discharge cell and green discharge cell is relatively small. That is, in the red discharge cell and the green discharge cell, the amount of crosstalk caused by the address discharge generated in the blue discharge cell is relatively small. This also contributes to relatively lowering the minimum value of the address pulse voltage Vd necessary for the address operation in the red discharge cell and the green discharge cell.
- the influence of the address discharge generated in the red discharge cell and the green discharge cell on the adjacent blue discharge cell is relatively large. That is, in the blue discharge cell, the amount of crosstalk caused by the address discharge generated in the red discharge cell and the green discharge cell is relatively large. This contributes to relatively increasing the minimum value of the address pulse voltage Vd necessary for the address operation in the blue discharge cell.
- the second table is used when converting the gradation value of the color of the discharge cell, in which the electrode width of the data electrode 32 is narrower than that of other discharge cells, into image data.
- the second table has fewer gradations that can be displayed on the panel 10 than the first table, and noise is likely to occur when the image signal is dithered.
- noise is likely to occur when the image signal is dithered.
- human visual characteristics it has been confirmed that a blue image is less likely to perceive noise than a red image or a green image. This is the reason why the discharge cell that narrows the electrode width of the data electrode 32 is a blue discharge cell in the present embodiment.
- the minimum value of the address pulse voltage Vd necessary for the address operation in the subfield SF2 and the subfield SF3 is higher than that in the other subfields. From this, it can be said that in the blue discharge cell, the cross-field is more likely to occur in the subfield SF2 and the subfield SF3 than in other subfields.
- FIGS. 9A and 9B An example of such a light emission pattern is shown in FIGS. 9A and 9B.
- FIG. 9A is a diagram illustrating an example of a light emission pattern in which the address operation in the blue discharge cell is likely to be unstable in the plasma display device 40 according to the first exemplary embodiment of the present invention.
- FIG. 9B is a diagram showing another example of the light emission pattern in which the address operation in the blue discharge cell is likely to be unstable in the plasma display device 40 according to the first exemplary embodiment of the present invention.
- the light emitting subfield is indicated by “ ⁇ ”, and the non-light emitting subfield is indicated by a blank.
- a gradation value “27” is displayed with a red discharge cell
- a gradation value “15” is displayed with a green discharge cell
- a gradation value “29” is displayed with a blue discharge cell.
- the red discharge cell and the green discharge cell emit light, and the blue discharge cell does not emit light.
- the address operation tends to become unstable in the subfields after the subfield SF3, and the sustain discharge may not occur. If no sustain discharge occurs in all the subfields after the subfield SF3 in the blue discharge cell, the gradation value actually displayed in the blue discharge cell to display the gradation value “29” is “1”. "
- the red discharge cell and the green discharge cell emit light, and the blue discharge cell does not emit light. Therefore, for the reasons described above, in the blue discharge cells, the address operation tends to become unstable in the subfields after the subfield SF4, and the sustain discharge may not occur. If no sustain discharge occurs in all the subfields after the subfield SF4 in the blue discharge cell, the gradation value actually displayed in the blue discharge cell to display the gradation value “27” is “3”. "
- a subfield in which at least one of a red discharge cell and a green discharge cell emits light without emitting a blue discharge cell.
- the image data may be generated so as not to generate a light emission pattern that occurs and a blue discharge cell emits light in a subfield after that subfield.
- the blue tone value is converted into blue image data.
- the second table does not include coding in which at least one of the subfield SF2 and the subfield SF3 emits light and any of the subfield SF4, subfield SF5, and subfield SF6 emits light. That is, in the image data based on the second table, the subfield SF1 emits light at all the gradation values greater than or equal to the gradation value “1”, and the subfield SF2 exists at all the gradation values greater than or equal to the gradation value “3”. Light is emitted, and the subfield SF3 emits light at all gradation values of gradation value “7” or higher.
- the blue discharge cell does not emit light and at least one of the red discharge cell and the green discharge cell emits light, and in the subsequent subfields. It is possible to prevent the light emission pattern “the blue discharge cell emits light” from being generated in the plasma display device 40.
- the number of gradation values that can be displayed on the panel 10 is relatively reduced.
- generally known dither values can be used for gradation values that cannot be displayed.
- the image can be displayed on the panel 10 in a pseudo manner using a technique such as processing or error diffusion processing.
- the blue gradation value is converted into blue image data based on the first table.
- the “first color” and the “second color” are set based on the electrode width of the data electrode 32. That is, the color emitted from the discharge cell having the relatively wide electrode width of the data electrode 32 is defined as “first color”, and the color emitted from the discharge cell having the relatively narrow electrode width of the data electrode 32 is defined as “second color”. Color ".
- the gradation value is converted into image data based on one of the first table and the second table, and light emission / non-display of each subfield is performed based on the image data. Control light emission.
- the gradation value is converted into image data based on the first table, and the light emission / non-light emission of each subfield is controlled based on the image data.
- the gradation value of “second color” is converted into image data based on the second table, and “ If the gradation values of “first color” are both less than a predetermined threshold value, the gradation values of “second color” are converted into image data based on the first table.
- the “second color” is blue
- the blue gradation value when the blue gradation value is converted into image data, the “other colors” are red and green as the “first color”. If at least one of the red tone value and the green tone value is equal to or greater than a predetermined threshold value, the blue tone value is converted into blue image data based on the second table, and the red tone value is converted. If both the value and the green gradation value are less than the predetermined threshold value, the blue gradation value is converted into blue image data based on the first table.
- the probability that the subfield that emits light continuously occurs is greater when displaying the gradation on the panel 10 using the second table than when displaying the gradation on the panel 10 using the first table.
- the second table is set so that becomes higher.
- the electrode width of the data electrode 32 constituting the red discharge cell and the green discharge cell is relatively wide, and the electrode width of the data electrode 32 constituting the blue discharge cell is relatively narrow.
- each operation has been described with the “first color” set to red and green and the “second color” set to blue.
- the present invention is not limited to this configuration.
- the “first The “color” may be set to blue and green, and the “second color” may be set to red.
- the “first The “color” may be set to red and blue, and the “second color” may be set to green.
- the configuration in which the predetermined threshold is “3” has been described.
- the present invention is not limited to this configuration. It is desirable that the predetermined threshold value is optimally set according to each coding constituting the first table and the second table.
- the present invention is not limited to this configuration.
- the operation example shown in the present embodiment is effective when one pixel is constituted by three discharge cells arranged in the order of green, blue, and red.
- the “first color” is red and green
- the “second color” is blue
- one discharge pixel that is arranged in the order of red, green, and blue constitutes one pixel
- the present invention is not limited to this configuration.
- a configuration in which a third table is provided in addition to the first table and the second table may be employed.
- the structure which provides more tables, such as a 4th table and a 5th table may be sufficient.
- the third table has a rule that “a discharge cell that does not emit light in subfield SF1 does not emit light after subfield SF2, and a discharge cell that does not emit light in subfield SF2 does not emit light after subfield SF3”. It is assumed that the table has. Then, when the gradation value of “second color” is converted into image data, if both of the gradation values of “first color” are less than a predetermined threshold value, the “first color” is determined based on the first table. The gradation value of “2 colors” is converted into image data.
- the “second color” gradation value is converted into image data based on the third table. If the gradation values of “first color” are both equal to or greater than a predetermined threshold value, the gradation value of “second color” is converted into image data based on the second table. For example, such a configuration may be used.
- the first table is displayed. If the red gradation value or the green gradation value is greater than or equal to the first threshold value and less than the second threshold value (for example, “7”), the third table is used to determine the red gradation value.
- the green tone value is equal to or greater than the second threshold value, the blue tone value may be converted into image data using the second table.
- the rule is that when the discharge cells emitting “first color” emit light at least up to the subfield SF (N) by the image data based on the gradation value of “first color”.
- the “second color” level is set so that the subfield SF (N + 1) and subsequent subfields do not emit light unless the subfield SF (N) emits light.
- the image data corresponding to the tone value is generated ”.
- the discharge cell that emits the “first color” emits light at least up to the subfield SF5 based on the image data based on the gradation value of the “first color”
- the “second color” is displayed.
- image data corresponding to the gradation value of the “second color” is generated so that if the subfield SF5 does not emit light, the subfield after the subfield SF6 does not emit light.
- the second table is set as shown in FIG. 5B for the purpose of reducing the crosstalk generated in subfield SF2 and subfield SF3 based on the measurement result shown in FIG. did.
- the present invention is not limited to this configuration. It is desirable that the second table is optimally set according to the subfield that is a target for reducing crosstalk.
- a discharge cell that did not emit light in the subfield SF1 does not emit light in the subfield SF2 and later.
- Discharge cells that did not emit light in subfield SF2 do not emit light after subfield SF3
- discharge cells that did not emit light in subfield SF3 do not emit light after subfield SF4
- discharge did not emit light in subfield SF4 The second table may be set based on the rule that the cell does not emit light even after the subfield SF5.
- the two color discharge cells have a relatively wide electrode width of the data electrode 32, and the one color discharge cell has the electrode width of the data electrode 32.
- the relatively narrow example That is, the panel 10 has an example in which the electrode width of the data electrode 32 constituting the red discharge cell and the green discharge cell is relatively wide and the electrode width of the data electrode 32 constituting the blue discharge cell is relatively narrow.
- one color discharge cell has a relatively wide electrode width of the data electrode 32, and two color discharge cells have the electrode width of the data electrode 32.
- An example in which is relatively narrow will be described.
- FIG. 10 is an enlarged schematic view showing the arrangement of the discharge cells and data electrodes of the panel used in the plasma display device in accordance with the second exemplary embodiment of the present invention.
- the electrode width of the data electrode 32 constituting the green discharge cell is relatively wide, and the electrode width of the data electrode 32 constituting the red discharge cell and the blue discharge cell is relatively narrow.
- the “second color” is red and blue.
- FIG. 11 is a diagram schematically showing a configuration example of the image signal processing circuit 141 used in the plasma display device according to the second embodiment of the present invention.
- FIG. 11 shows only circuit blocks related to each operation shown in the present embodiment, and other circuit blocks are omitted.
- the image signal processing circuit 141 shown in FIG. 11 has substantially the same configuration as the image signal processing circuit 41 shown in FIG.
- the image signal processing circuit 141 shown in FIG. 11 is different from the image signal processing circuit 41 in that, in addition to the configuration of the image signal processing circuit 41, a storage device (hereinafter referred to as a “second table”) that stores a second table corresponding to the red image signal. 2 table 53R ”) and a selector 56R, and the configuration of the table determination unit 80 is different from that of the table determination unit 55.
- the second table stored in the second table 53R is the same as the second table shown in FIG. 5B. Therefore, the table stored in the second table 53R and the table stored in the second table 53B are equal to each other.
- the table determination unit 80 further includes a comparator 64 and an OR gate 65 in addition to the configuration of the table determination unit 55 shown in FIG.
- the comparator 64 compares the blue tone value output from the tone value conversion unit corresponding to the blue image signal with a predetermined threshold value.
- the predetermined threshold is set to “3”, for example. Then, the comparator 64 outputs an “H” level if the blue tone value is equal to or greater than a predetermined threshold (for example, the blue tone value is “3” or greater), and the blue tone value is predetermined. If it is less than the threshold value (for example, the blue tone value is less than “3”), the “L” level is output.
- the OR gate 65 performs a logical sum operation on the output of the comparator 62 and the output of the comparator 64 and outputs the result. That is, the OR gate 65 outputs the “L” level when the output of the comparator 62 and the output of the comparator 64 are both “L” level, and outputs the “H” level otherwise.
- the OR gate 65 has at least one of the green gradation value and the blue gradation value equal to or greater than a predetermined threshold value (for example, the gradation value “3” or more). Outputs “H” level.
- the output of the OR gate 65 is input to the selector 56R.
- the selector 56R selects one of the first table 52R and the second table 53R based on a signal output from the OR gate 65 of the table determination unit 80.
- the selector 56R in the present embodiment selects the second table 53R if the output of the OR gate 65 is “H” level, and selects the first table 52R if the output of the OR gate 65 is “L” level. .
- the data converter 54R reads the coding data from the table selected by the selector 56R based on the red tone value output from the tone value converter corresponding to the red image signal. For example, if the first table 52R is selected in the selector 56R, the coding data is read from the first table 52R based on the red gradation value output from the gradation value conversion unit. If the second table 53R is selected in the selector 56R, the coding data is read from the second table 53R based on the red tone value output from the tone value conversion unit. The read data is output as red image data.
- the data conversion unit 54R determines that at least one of the green gradation value and the blue gradation value is equal to or greater than a predetermined threshold (for example, the gradation value “3” or more). Based on the second table, the red gradation value is converted into red image data. Further, the data conversion unit 54R determines that the red floor is based on the first table if both the green gradation value and the blue gradation value are less than a predetermined threshold value (for example, less than the gradation value “3”). Convert key values to red image data.
- a predetermined threshold for example, the gradation value “3” or more
- the data electrode 32 has a relatively narrow electrode width in the two color discharge cells, and the one color discharge.
- the electrode width of the data electrode 32 is relatively wide in the cell. Therefore, unlike the first embodiment, the “first color” is one color and the “second color” is two colors.
- the gradation value is converted into image data based on the first table, and for the “second color”, the floor is based on either the first table or the second table. Convert key values to image data.
- gradation value of “second color” When converting the gradation value of “second color” into image data, if at least one of the gradation values of “other color” is equal to or greater than a predetermined threshold value, gradation based on the second table is used. The value is converted into image data, and if the gradation values of “other colors” are both less than a predetermined threshold value, the gradation value is converted into image data based on the first table.
- the “second color” is red and blue
- the “other colors” when the blue gradation value is converted into image data are red and green.
- “other colors” when the red gradation value is converted into image data are blue and green.
- the blue gradation value is determined based on the second table. If the tone value is converted into blue image data, and both the red tone value and the green tone value are less than a predetermined threshold value, the blue tone value is converted into blue image data based on the first table. Convert. Further, when converting the red gradation value into image data, if at least one of the blue gradation value and the green gradation value is equal to or greater than a predetermined threshold value, the red gradation value is based on the second table. If the tone value is converted into red image data and both the blue tone value and the green tone value are less than a predetermined threshold value, the red tone value is converted into red image data based on the first table. Convert.
- the drive voltage waveform shown in FIG. 4 is merely an example in the embodiment of the present invention, and the present invention is not limited to these drive voltage waveforms.
- the circuit configurations shown in FIGS. 6, 7, and 11 are merely examples in the embodiment of the present invention, and the present invention is not limited to these circuit configurations.
- the number of subfields constituting one field is not limited to the above number.
- the number of gradations that can be displayed on the panel 10 can be further increased.
- each circuit block shown in the embodiment of the present invention may be configured as an electric circuit that performs each operation shown in the embodiment, or a microcomputer that is programmed to perform the same operation. May be used.
- 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 50 inches and the number of display electrode pairs 24 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 the characteristics of the panel and the specifications of the plasma display device. Each of these numerical values is allowed to vary within a range where the above-described effect can be obtained. Also, the number of subfields constituting one field, the luminance weight of each subfield, etc. are not limited to the values shown in the embodiment of the present invention, and the subfield configuration is based on the image signal or the like. It may be configured to switch.
- the present invention enhances the effect of suppressing crosstalk, suppresses the influence of crosstalk on the image displayed on the panel when crosstalk occurs, and can display a high-quality image on the panel. Therefore, it is useful as a driving method of a plasma display device and a plasma display device.
Abstract
Description
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。ガラス製の前面基板21上には、走査電極22と維持電極23とからなる表示電極対24が複数形成されている。そして、走査電極22と維持電極23とを覆うように誘電体層25が形成され、その誘電体層25上に保護層26が形成されている。
実施の形態1では、1つの画素を構成する3色の放電セルのうち、2色の放電セルはデータ電極32の電極幅が相対的に広く、1色の放電セルはデータ電極32の電極幅が相対的に狭い例を説明した。すなわち、赤の放電セルおよび緑の放電セルを構成するデータ電極32の電極幅が相対的に広く、青の放電セルを構成するデータ電極32の電極幅が相対的に狭いパネル10を例に挙げて、各動作を説明した。
21 前面基板
22 走査電極
23 維持電極
24 表示電極対
25,33 誘電体層
26 保護層
31 背面基板
32 データ電極
34 隔壁
35,35R,35G,35B 蛍光体層
40 プラズマディスプレイ装置
41,141 画像信号処理回路
42 データ電極駆動回路
43 走査電極駆動回路
44 維持電極駆動回路
45 タイミング発生回路
52R,52G,52B 第1テーブル
53R,53B 第2テーブル
54R,54G,54B データ変換部
55,80 テーブル判定部
56R,56B セレクタ
61,62,64 コンパレータ
63,65 ORゲート
Claims (6)
- 1フィールドをあらかじめ輝度重みの定められた複数のサブフィールドで構成するとともに、発光するサブフィールドと非発光のサブフィールドとの組合せを複数選択して構成する表示用組合せ集合を複数備え、前記表示用組合せ集合に属する組合せを用いて放電セルの発光・非発光を制御して、走査電極および維持電極からなる表示電極対と幅の異なるデータ電極とを有する放電セルを複数備えたプラズマディスプレイパネルに階調を表示するプラズマディスプレイ装置の駆動方法であって、
前記表示用組合せ集合に、第1の表示用組合せ集合と、発光するサブフィールドと非発光のサブフィールドとの組合せの数が前記第1の表示用組合せ集合よりも少ない第2の表示用組合せ集合とを有し、
前記データ電極の電極幅が相対的に広い放電セルの階調値を画像データに変換する際には前記第1の表示用組合せ集合を用い、
前記データ電極の電極幅が相対的に狭い放電セルの階調値を画像データに変換する際には、前記第1の表示用組合せ集合または前記第2の表示用組合せ集合を用いる
ことを特徴とするプラズマディスプレイ装置の駆動方法。 - 前記データ電極の電極幅が相対的に狭い放電セルの階調値を画像データに変換する際に、
他の放電セルの少なくとも一方の階調値があらかじめ設定された所定のしきい値以上であれば前記第2の表示用組合せ集合を用いる
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の駆動方法。 - 前記第1の表示用組合せ集合および前記第2の表示用組合せ集合においては、特定のサブフィールドが発光しなければ前記特定のサブフィールド以降のサブフィールドも発光しないように、発光するサブフィールドと非発光のサブフィールドとの組合せを選択し、
前記第2の表示用組合せ集合における特定のサブフィールドの数を、前記第1の表示用組合せ集合における特定のサブフィールドの数よりも多くする
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の駆動方法。 - 前記データ電極の電極幅が相対的に狭い放電セルが発光する色は青色であ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の駆動方法。
- 前記データ電極の電極幅が相対的に狭い放電セルが発光する色は青色および赤色であ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の駆動方法。
- 走査電極および維持電極からなる表示電極対と幅の異なるデータ電極とを有する放電セルを複数備えたプラズマディスプレイパネルと、
書込み期間と、輝度重みに応じた数の維持パルスを前記表示電極対に印加する維持期間とを有する複数のサブフィールドで1フィールドを構成して前記プラズマディスプレイパネルを駆動し、発光するサブフィールドと非発光のサブフィールドとの組合せを複数選択して構成する表示用組合せ集合を複数備え、前記表示用組合せ集合に属する組合せを用いて放電セルの発光・非発光を制御して階調を表示する駆動回路とを含むプラズマディスプレイ装置であって、
前記駆動回路は、
第1の表示用組合せ集合と、発光するサブフィールドと非発光のサブフィールドとの組合せの数が前記第1の表示用組合せ集合よりも少ない第2の表示用組合せ集合とを有する前記表示用組合せ集合を用いて前記プラズマディスプレイパネルに階調を表示するとともに、
前記データ電極の電極幅が相対的に広い放電セルの階調値を画像データに変換する際には前記第1の表示用組合せ集合を用い、
前記データ電極の電極幅が相対的に狭い放電セルの階調値を画像データに変換する際には、前記第1の表示用組合せ集合または前記第2の表示用組合せ集合を用いる
ことを特徴とするプラズマディスプレイ装置。
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JPH11119726A (ja) * | 1997-10-14 | 1999-04-30 | Nec Corp | プラズマディスプレイパネル |
JPH11231827A (ja) * | 1997-07-24 | 1999-08-27 | Matsushita Electric Ind Co Ltd | 画像表示装置及び画像評価装置 |
JP2000215813A (ja) * | 1999-01-21 | 2000-08-04 | Mitsubishi Electric Corp | 交流型プラズマディスプレイパネル用基板、交流型プラズマディスプレイパネル、交流型プラズマディスプレイ装置及び交流型プラズマディスプレイパネルの駆動方法 |
JP2003066896A (ja) * | 2001-08-30 | 2003-03-05 | Matsushita Electric Ind Co Ltd | サブフィールド画像表示装置 |
JP2008051949A (ja) * | 2006-08-23 | 2008-03-06 | Fujitsu Hitachi Plasma Display Ltd | 階調表示処理方法及びプラズマディスプレイ装置 |
JP2008083564A (ja) * | 2006-09-28 | 2008-04-10 | Fujitsu Hitachi Plasma Display Ltd | 多階調表示方法及び装置 |
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- 2011-10-12 KR KR1020137006374A patent/KR20130043224A/ko not_active Application Discontinuation
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JPH11231827A (ja) * | 1997-07-24 | 1999-08-27 | Matsushita Electric Ind Co Ltd | 画像表示装置及び画像評価装置 |
JPH11119726A (ja) * | 1997-10-14 | 1999-04-30 | Nec Corp | プラズマディスプレイパネル |
JP2000215813A (ja) * | 1999-01-21 | 2000-08-04 | Mitsubishi Electric Corp | 交流型プラズマディスプレイパネル用基板、交流型プラズマディスプレイパネル、交流型プラズマディスプレイ装置及び交流型プラズマディスプレイパネルの駆動方法 |
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