WO2009096186A1 - 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 Download PDFInfo
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- WO2009096186A1 WO2009096186A1 PCT/JP2009/000350 JP2009000350W WO2009096186A1 WO 2009096186 A1 WO2009096186 A1 WO 2009096186A1 JP 2009000350 W JP2009000350 W JP 2009000350W WO 2009096186 A1 WO2009096186 A1 WO 2009096186A1
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 125
- 238000000034 method Methods 0.000 abstract description 23
- 238000010586 diagram Methods 0.000 description 28
- 239000010410 layer Substances 0.000 description 9
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- 238000005192 partition Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
-
- 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
-
- 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
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- 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
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
Definitions
- the present invention relates to a plasma display device using an AC type plasma display panel.
- a typical plasma display panel (hereinafter abbreviated as “panel”) as an image display device having a large number of pixels arranged in a plane has a large number of discharge cells having scan electrodes, sustain electrodes, and data electrodes.
- the phosphors are excited and emitted by gas discharge generated inside each discharge cell to perform color display.
- the subfield method is mainly used as a method for displaying an image on a plasma display device using such a panel.
- one field is composed of a plurality of subfields with predetermined luminance weights, and an image is displayed by controlling light emission / non-light emission of each discharge cell in each subfield.
- the plasma display apparatus includes a scan electrode drive circuit for driving the scan electrodes, a sustain electrode drive circuit for driving the sustain electrodes, and a data electrode drive circuit for driving the data electrodes, and the drive circuits for the electrodes are respectively A necessary drive voltage waveform is applied to the electrodes.
- the data electrode driving circuit needs to apply an address pulse for the address operation independently for each of a large number of data electrodes based on the image signal, and is usually configured using a dedicated IC.
- each data electrode is a capacitive load having a stray capacitance between the adjacent data electrode, scan electrode, and sustain electrode.
- the power consumption of the data electrode drive circuit increases as the charge / discharge current of the capacity of the data electrode increases, but this charge / discharge current largely depends on the image signal to be displayed. For example, when the address pulse is not applied to all the data electrodes, the charge / discharge current is “0”, so that the power consumption is minimized. Conversely, when the address pulse is applied to all the data electrodes, the charge / discharge current is “0”, so the power consumption is small. However, when an address pulse is randomly applied to the data electrode, the charge / discharge current increases. In particular, when the address pulse is applied alternately to adjacent data electrodes, the capacitance between the adjacent data electrodes and the scan electrode In addition, since the electrostatic capacitance between the storage electrode and the sustain electrode is charged / discharged, the power consumption becomes very large.
- the power consumption of the data electrode drive circuit is predicted based on the image signal, and the write operation is prohibited from the subfield having the smallest luminance weight to consume the data electrode drive circuit.
- a method for limiting power for example, see Patent Document 1 has been proposed.
- Patent Document 2 Although the effect of suppressing the power is less than that of Patent Document 1, as a method of suppressing the power while suppressing the deterioration of the image display quality, for example, the subfield writing operation is not completely prohibited, but the frequency of the writing operation is changed. A method of limiting the power consumption of the data electrode driving circuit by reducing the number (for example, see Patent Document 2) has been proposed.
- the power suppression effect varies greatly depending on the image to be displayed, but as a method in which the image display quality does not deteriorate, the charge / discharge current is reduced by changing the order of the address pulses applied to the data electrode, and the data electrode drive circuit A method for limiting power consumption (see, for example, Patent Document 3) has been proposed.
- the plasma display device of the present invention includes a panel, a scan electrode drive circuit, a sustain electrode drive circuit, a data electrode drive circuit, and an image signal processing circuit.
- the panel includes a plurality of discharge cells each having a display electrode pair including a scan electrode and a sustain electrode and a data electrode.
- the scan electrode drive circuit, the sustain electrode drive circuit, and the data electrode drive circuit are a sequential write operation in which a scan pulse is sequentially applied to the scan electrode and an address pulse is applied to the data electrode, or every other scan pulse is applied to the scan electrode.
- the sustain electrode and the data electrode are driven.
- the image signal processing circuit converts the input image signal into image data to be input to the data electrode driving circuit.
- the image signal processing circuit includes an image data conversion circuit, a sequential writing processing circuit, an interlace writing processing circuit, and a selection circuit.
- the image data conversion circuit converts the image signal into image data indicating light emission / non-light emission of the discharge cells for each subfield.
- the sequential writing processing circuit converts the output of the image data conversion circuit into image data corresponding to the sequential writing operation.
- the interlace write processing circuit converts the output of the image data conversion circuit into image data corresponding to the interlace write operation.
- the image data selection circuit selects the output of either the sequential write processing circuit or the interlace write processing circuit.
- the sequential write processing circuit includes a sequential write array unit, a first pre-conversion power prediction unit, a first data power conversion unit, a first write stop unit, and a first post-conversion power prediction unit. is doing.
- the sequential writing arrangement unit arranges the output of the image data conversion circuit corresponding to the sequential writing operation.
- the first pre-conversion power prediction unit predicts the power consumption of the data electrode driving circuit based on the output of the sequential write array unit.
- the first data power conversion unit converts the output of the sequential writing array unit for a specific subfield into image data with low power consumption of the data electrode driving circuit.
- the first write stop unit converts the output of the first data power conversion unit so as to stop the write operation for a specific subfield so that the power consumption of the data electrode driving circuit is equal to or lower than a predetermined power threshold value. To do.
- the first post-conversion power prediction unit predicts the power consumption of the data electrode driving circuit based on the output of the first write stop unit.
- the interlaced write processing circuit includes an interlaced write array unit, a second pre-conversion power prediction unit, a second data power conversion unit, a second write stop unit, and a second post-conversion power prediction unit. is doing.
- the interlaced writing arrangement unit arranges the output of the image data conversion circuit corresponding to the interlaced writing operation.
- the second pre-conversion power predicting unit predicts the power consumption of the data electrode driving circuit based on the output of the interlaced writing array unit.
- the second data power conversion unit converts the output of the interlaced writing array unit for a specific subfield into image data with low power consumption of the data electrode driving circuit.
- the second address stop unit converts the output of the second data power conversion unit so as to stop the address operation for the specific subfield so that the power consumption of the data electrode driving circuit is equal to or lower than a predetermined power threshold value. To do.
- the second post-conversion power prediction unit predicts the power consumption of the data electrode driving circuit based on the output of the second address stop unit.
- the first data power conversion unit converts the number of specific subfields into image data with low power consumption of the data electrode driving circuit
- the second data power conversion unit consumes the data electrode driving circuit.
- the number of specific subfields to be converted into image data with low power is made equal.
- the number of specific subfields that the first data power conversion unit and the second data power conversion unit convert into image data with low power consumption of the data electrode driving circuit is It is desirable to set based on the larger power of the power predicted by the pre-conversion power prediction unit and the power predicted by the second pre-conversion power prediction unit.
- FIG. 1 is an exploded perspective view showing a structure of a panel used in the embodiment of the present invention.
- FIG. 2 is an electrode array diagram of the panel.
- FIG. 3 is a diagram schematically showing the interelectrode capacitance of the panel.
- FIG. 4 is a diagram showing drive voltage waveforms applied to the respective electrodes of the panel.
- FIG. 5 is a circuit block diagram of the plasma display device in accordance with the exemplary embodiment of the present invention.
- FIG. 6A is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 6B is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 6A is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 6C is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 6D is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 6E is a diagram showing a checkered pattern in which the gradation value changes for each scan electrode and each data electrode.
- FIG. 7 is a diagram for estimating the power consumption of the data electrode driving circuit.
- FIG. 8 is a diagram for estimating the power consumption of the data electrode driving circuit.
- FIG. 9 is a circuit block diagram showing details of the image signal processing circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
- FIG. 10A is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 10A is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 10B is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 10C is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 10D is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 10E is a diagram for explaining the operation of the data power conversion unit of the plasma display device.
- FIG. 11 is a diagram for explaining the operation of the image data determination circuit of the plasma display device.
- FIG. 1 is an exploded perspective view showing a structure of a panel 10 used in the 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 scan electrode 22 and sustain electrode 23.
- a protective layer 26 is formed on the dielectric layer 25.
- a plurality of data electrodes 32 are formed on the back substrate 31.
- a dielectric layer 33 is formed so as to cover the data electrode 32.
- a cross-shaped partition wall 34 is formed on the dielectric layer 33. On the side surface of the partition wall 34 and on the dielectric layer 33, a phosphor layer 35 that emits light of each color of red, green, and blue is provided.
- 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 each other with a minute discharge space interposed therebetween.
- the outer peripheral portions of the front substrate 21 and the rear substrate 31 are sealed with a sealing material such as glass frit.
- a sealing material such as glass frit.
- a mixed gas of neon and xenon is sealed as a discharge gas.
- the discharge space is formed by being partitioned into a plurality of sections by a partition wall 34.
- a discharge cell is formed at a portion where the display electrode pair 24 and the data electrode 32 intersect. These discharge cells discharge and emit light to display an image.
- the panel 10 includes a plurality of discharge cells each having the display electrode pair 24 including the scan electrode 22 and the sustain electrode 23 and the data electrode 32.
- 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 embodiment of the present invention.
- FIG. 3 is a diagram schematically showing the interelectrode capacitance of the panel 10 used in the embodiment of the present invention, and shows the interelectrode capacitance related to the data electrode.
- An interelectrode capacitance Cs exists in each of the portions where the display electrode pair and the data electrode intersect.
- An interelectrode capacitance Cd exists between the adjacent data electrodes.
- FIG. 3 shows interelectrode capacitance Cs at the intersection of five scan electrodes SCi-2 to SCi + 2 and sustain electrodes SUi-2 to SUi + 2 and five data electrodes Dj-2 to Dj + 2, and five data electrodes.
- An interelectrode capacitance Cd between Dj ⁇ 2 and Dj + 2 is illustrated.
- the display electrode pair composed of the scan electrode SCi and the sustain electrode SUi is indicated by one thick horizontal line
- the interelectrode capacitance between the display electrode pair and the data electrode Dj is indicated by Cs.
- a so-called subfield method is used as a method of displaying a gradation corresponding to an image signal.
- the subfield method is a method of performing gradation display by dividing one field into a plurality of subfields and controlling light emission / non-light emission of each discharge cell for each subfield.
- one field is divided into, for example, 10 subfields, and each subfield is (“1”, “2”, “3”, “6”, “11”, “18”, “30”, “44”, “60”, “81”).
- one field is divided into four subfields (first SF, second SF, third SF, and fourth SF), and each subfield is (“1”, “2”, The description will be made assuming that the luminance weights are “4” and “8”).
- FIG. 4 is a diagram showing a driving voltage waveform applied to each electrode of panel 10 in the embodiment of the present invention.
- FIG. 4 shows drive voltage waveforms for two subfields, but drive voltage waveforms in other subfields are substantially the same.
- 0 (V) is applied to the data electrodes D1 to Dm and the sustain electrodes SU1 to SUn, and a ramp voltage that gradually increases from the voltage Vi1 to the voltage Vi2 is applied to the scan electrodes SC1 to SCn.
- voltage Ve1 is applied to sustain electrodes SU1 to SUn, and a ramp voltage that gradually decreases from voltage Vi3 to voltage Vi4 is applied to scan electrodes SC1 to SCn.
- a weak initializing discharge occurs in each discharge cell, and wall charges necessary for the subsequent address operation are formed on each electrode. Note that as the operation in the initialization period, as shown in the initialization period of the second SF in FIG. 4, it is only necessary to apply a ramp voltage that gradually falls to the scan electrodes SC1 to SCn.
- voltage Ve2 is applied to sustain electrodes SU1 to SUn
- voltage Vc is applied to scan electrodes SC1 to SCn
- 0 (V) is applied to data electrodes D1 to Dm.
- the above-described address operation is repeated in the discharge cells of all lines, and an address discharge is selectively generated in the discharge cells to emit light to form wall charges.
- the order of the scan electrodes to which the scan pulse is applied is arbitrary.
- one of the write operations of sequentially applying a scan pulse to the scan electrodes and applying every other scan pulse to the scan electrodes is performed. That is, an address operation (hereinafter abbreviated as “sequential address operation”) in which scan pulses are applied in the order of scan electrodes SC1, SC2, SC3,..., SCn, and scan electrodes SC1, SC3, SC5,.
- any one of the address operations (hereinafter abbreviated as “interlaced address operation”) in which scan pulses are applied in the order of SCn ⁇ 1, SC2, SC4, SC6,. That is, a sequential write operation in which a scan pulse is sequentially applied to the scan electrode 22 and an address pulse is applied to the data electrode 32, or every other scan pulse is applied to the scan electrode 22 and an address pulse is applied to the data electrode 32.
- a plurality of subfields each having an address period in which an address operation is performed and a sustain period in which the discharge cell in which the address operation is performed emit light form one field, and drive the scan electrode 22, the sustain electrode 23, and the data electrode 32, respectively. .
- the data electrodes D1 to Dm are driven by a data electrode driving circuit described later.
- each data electrode Dk is a capacitive load. Accordingly, during the address period, the capacitor must be charged and discharged every time the voltage applied to each data electrode is switched from the ground potential 0 (V) to the address pulse voltage Vd or from the address pulse voltage Vd to the ground potential 0 (V). I must. If the number of times of charging / discharging is large, the power consumption of the data electrode driving circuit also increases. Therefore, in order to reduce the power consumption of the data electrode driving circuit, the order in which the scan pulses are applied to the scan electrodes is switched in the present embodiment. Specifically, although details will be described later, in the present embodiment, the order in which the scan pulses are applied to the scan electrodes is switched so that the number of charge / discharge cycles is reduced.
- 0 (V) is applied to sustain electrodes SU1 to SUn.
- sustain pulse voltage Vs is applied to scan electrodes SC1 to SCn.
- a sustain discharge occurs in the discharge cell in which the address discharge has occurred and emits light.
- V voltage 0
- Vs sustain pulse voltage
- sustain electrodes SU1 to SUn the sustain electrodes SU1 to SUn.
- the sustain discharge occurs again in the discharge cell in which the sustain discharge has occurred, and light is emitted.
- the luminance weight of the first SF is “1”
- a sustain pulse is applied to scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn, for example, once. In this way, the discharge cell that has performed the address operation emits light.
- sustain pulse voltage Vs is applied to scan electrodes SC1 to SCn and voltage Ve1 is applied to sustain electrodes SU1 to SUn to perform so-called wall charge erasing, and the sustain period of the first SF is completed.
- the discharge cell is caused to emit light by repeating the same operation as that of the subfield described above, and an image is displayed.
- a sustain pulse is applied to the scan electrodes SC1 to SCn and the sustain electrodes SU1 to SUn, for example, twice.
- sustain pulses are applied to scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn, for example, four times.
- sustain pulses are applied to scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn, for example, 8 times. In this way, the discharge cell emits light with a luminance corresponding to the luminance weight of each subfield.
- FIG. 5 is a circuit block diagram of plasma display device 100 in accordance with the exemplary embodiment of the present invention.
- the plasma display apparatus 100 includes a panel 10, 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 that supplies necessary power to each circuit block. (Not shown).
- Scan electrode drive circuit 43, sustain electrode drive circuit 44, and data electrode drive circuit 42 drive scan electrode 22, sustain electrode 23, and data electrode 32 of FIG. 1, respectively.
- the image signal processing circuit 41 converts the input image signal into image data in which light emission / non-light emission in each of the subfields is made to correspond to “1” and “0” of each bit of the digital signal, and the data electrode The image data is converted so that the power of the drive circuit 42 is below a predetermined power threshold. Then, the image data is input to the data electrode driving circuit 42.
- the data electrode drive circuit 42 includes m switch circuits 42 (1) to 42 (m) for applying the write pulse voltage Vd or 0 (V) to each of the m data electrodes D1 to Dm in FIG. I have.
- the image data output from the image signal processing circuit 41 is converted into address pulses corresponding to the data electrodes D1 to Dm and applied to the data electrodes D1 to Dm.
- the data electrode driving circuit 42 needs to independently drive a large number of data electrodes D1 to Dm based on image data, a plurality of dedicated ICs (hereinafter referred to as “data drivers”) are used. It is configured.
- the number m of data electrodes is “4000”
- the number of outputs of one data driver is “256”
- the data electrode driving circuit 42 is configured using 16 data drivers IC1 to IC16.
- the present invention is not limited to the number of data electrodes, the number of outputs of the data driver, and the like.
- the drive circuit for driving a large number of data electrodes into an IC the circuit can be made compact, the mounting area can be reduced, and the cost can be reduced.
- the allowable power loss of the data driver is limited, it must be used in a range where the power consumption of each data driver does not exceed this limit.
- the timing generation circuit 45 generates various timing signals for controlling the operation of each circuit based on the horizontal synchronization signal and the vertical synchronization signal, and supplies them to each circuit.
- Scan electrode drive circuit 43 drives scan electrodes SC1 to SCn based on these timing signals.
- Sustain electrode drive circuit 44 drives sustain electrodes SU1 to SUn based on these timing signals.
- the power consumption of the data electrode driving circuit 42 varies greatly depending on the displayed image. This will be described using a typical image pattern as an example. Note that the power consumption described here is the power consumption accompanying the write operation.
- FIG. 6A shows the gradation value of the checkered pattern, and is an image pattern in which the gradation value “3” and the gradation value “12” are alternately repeated both in the horizontal direction and in the vertical direction.
- FIG. 6B shows the presence / absence of a write pulse in the first SF of the image data corresponding to the pattern.
- 6C, 6D, and 6E show the presence / absence of a write pulse in the second SF, the third SF, and the fourth SF, respectively.
- 6B to 6E “0” indicates that there is no write pulse, and “1” indicates that there is a write pulse.
- FIG. 7 is a diagram for estimating the power consumption of the data electrode drive circuit 42.
- FIG. 7 shows the address period of the first SF when the address pulse is applied in the order of scan electrodes SC1, SC2, SC3,..., SCn and the address operation is performed, that is, when the address operation is sequentially performed.
- the drive voltage waveform and current waveform at that time are shown.
- FIG. 7 shows a scan pulse applied to scan electrodes SCi-2 to SCi + 2, an address pulse applied to data electrodes Dj-2 to Dj + 2, and a current waveform IDj flowing to data electrode Dj due to charging / discharging of interelectrode capacitance. Show.
- the horizontal axis is time, and shows each waveform in the period from time t1 to time t6.
- a scan pulse is applied to scan electrode SCi-2 and an address pulse is applied to data electrodes Dj-2, Dj, Dj + 2 to generate an address discharge.
- no address pulse is applied to the data electrodes Dj ⁇ 1 and Dj + 1 and no address discharge is generated.
- a scan pulse is applied to scan electrode SCi-1, and an address pulse is applied to data electrodes Dj-1, Dj + 1 to generate an address discharge.
- An address pulse is not applied to the data electrodes Dj-2, Dj, Dj + 2, and no address discharge is generated.
- a current for charging / discharging the interelectrode capacitance Cd flows against the address pulse applied to the data electrode Dj-1 and the data electrode Dj + 1 in opposite phases. Therefore, the power consumption of the data electrode driving circuit 42 when displaying a checkered pattern is a very large value.
- FIG. 8 is a diagram for estimating the power consumption of the data electrode drive circuit 42 when displaying the same checkerboard pattern as FIG.
- FIG. 8 shows the case where the address pulse is applied in the order of scan electrodes SC1, SC3, SC5,..., SCn-1, SC2, SC4, SC6,.
- the drive voltage waveform in the address period of the first SF and the current waveform of charge / discharge of the interelectrode capacitance at that time when the interlace address operation is performed are shown.
- the horizontal axis is time, and shows each waveform in the period from time t11 to time t17.
- a scan pulse is applied to scan electrode SCi-2 and an address pulse is applied to data electrodes Dj-2, Dj, Dj + 2 to generate an address discharge.
- no address pulse is applied to the data electrodes Dj ⁇ 1 and Dj + 1 and no address discharge is generated.
- a scan pulse is applied to the scan electrode SCi and an address pulse is continuously applied to the data electrodes Dj-2, Dj, Dj + 2 to generate an address discharge.
- the power consumption of the data electrode drive circuit 42 varies greatly depending on the order in which the scan pulses are applied to the scan electrodes.
- FIG. 9 is a circuit block diagram showing details of the image signal processing circuit 41 of the plasma display device 100 according to the embodiment of the present invention.
- the image signal processing circuit 41 includes an image data conversion circuit 50, a sequential writing processing circuit 51, an interlaced writing processing circuit 52, an image data selection circuit 55, and a maximum value selection circuit 59.
- the image data conversion circuit 50 converts the input image signal into image data indicating light emission / non-light emission of the discharge cells for each subfield.
- the sequential write processing circuit 51 arranges the image data output from the image data conversion circuit 50 in an order corresponding to the sequential write operation, and when the sequential write operation is performed, the power consumption of the data electrode drive circuit 42 is a predetermined power threshold.
- the image data is converted so as to be less than the value.
- the interlaced write processing circuit 52 arranges the image data output from the image data conversion circuit 50 in an order corresponding to the interlaced write operation, and when performing the interlaced write operation, the power consumption of the data electrode drive circuit 42 is a predetermined power threshold.
- the image data is converted so as to be less than the value.
- the image data selection circuit 55 includes an image data determination unit 56 and an image data selection unit 57.
- the image data determination unit 56 compares the image display quality of the respective image data of the sequential writing processing circuit 51 and the interlaced writing processing circuit 52 to determine which of the sequential writing and the interlaced writing should be selected. Then, the image data selection unit 57 sequentially selects either the output of the write processing circuit 51 or the output of the interlace write processing circuit 52 according to the determination result of the image data determination unit 56.
- the maximum value selection circuit 59 inputs the power consumption for the image data of the array corresponding to the sequential write operation and the power consumption for the image data of the array corresponding to the interlaced write operation. Is output.
- the sequential write processing circuit 51 includes a sequential write array unit 61, a first pre-conversion power prediction unit 62 (hereinafter referred to as “pre-conversion power prediction unit 62”), and a first data power conversion unit 63 (hereinafter referred to as “power conversion unit 62”).
- pre-conversion power prediction unit 62 a first pre-conversion power prediction unit 62
- power conversion unit 63 a first data power conversion unit 63
- a first data stop unit 64 hereinafter referred to as “write stop unit 64”
- a first converted power prediction unit 65 hereinafter referred to as “converted power prediction”). Part 65 ”).
- the sequential writing arrangement unit 61 arranges the image signals output from the image data conversion circuit 50 corresponding to the sequential writing operation.
- image data for one field is taken into the memory, and the scan electrodes SC1, SC2, SC3,. Output image data.
- the pre-conversion power prediction unit 62 predicts the estimated power consumption value of each data driver of the data electrode drive circuit 42 individually based on the image data output from the write array unit 61 sequentially. Then, the maximum value of the estimated power consumption is output to the maximum value selection circuit 59.
- the power of the data electrode drive circuit 42 increases as the number of changes in the voltage applied to each of the data electrodes Dj increases. In addition, when the voltages applied to the adjacent data electrodes Dj + 1 and Dj ⁇ 1 are changed in opposite phases, the voltage is further increased. In order to drive the data electrodes D1 to Dm by calculating the sum of exclusive OR of the upper and lower and left and right pixels for each bit of the image data corresponding to each of the subfields from such a relationship.
- the pre-conversion power prediction unit 62 in the present embodiment calculates the sum of exclusive OR of image data corresponding to each of the data drivers IC1 to IC16, and predicts the estimated power value of each of the data drivers IC1 to IC16. The maximum value is output. Accordingly, the pre-conversion power prediction unit 62 predicts the power consumption of the data electrode driving circuit 42 based on the image data output from the sequential write array unit 61.
- the post-conversion power prediction unit 65 is also based on the image data input to the post-conversion power prediction unit 65 based on the estimated power consumption values of the data drivers of the data electrode drive circuit 42. Based on the image data output from the write stop unit 65, prediction is performed individually. And the maximum value of those estimated values of power consumption is output. Thereby, the post-conversion power predicting unit 65 predicts the power consumption of the data electrode driving circuit 42 based on the image data output from the address stopping unit 65. In addition, the post-conversion power prediction unit 65 predicts the estimated power consumption of each of the data drivers of the data electrode drive circuit 42 individually based on the image data input to the post-conversion power prediction unit 65, and sums these values. The total power consumption of the drive circuit 42 is output.
- the data power conversion unit 63 Based on the output of the maximum value selection circuit 59, the data power conversion unit 63 reduces the power consumption of the data electrode driving circuit 42 for the image data output from the sequential writing array unit 61 for the specific subfield as follows. Convert to image data.
- the data power conversion unit 63 compares, for each of the data electrodes, the gradation values of the image data that performs the write operation at a certain timing and the image data that performs the write operation at the next timing.
- the gradation value of image data (hereinafter abbreviated as “upper data”) that performs the writing operation at a certain timing is the image data that performs the writing operation at the next timing (hereinafter abbreviated as “lower data”). If it is smaller than the tone value, the upper data is output as it is.
- the light emission state of a specific subfield is the same for the upper data and the lower data in order from the subfield with the smallest luminance weight.
- the upper data is converted and output as follows.
- making the light emission states of the specific subfields of the upper data and the lower data the same means making the upper data and the lower data of the specific subfield equal.
- the number of specific subfields having the same light emission state is determined based on the output of the maximum value selection circuit 59.
- the output is large, the number of specific subfields having the same light emission state is increased. If it is smaller, the number of specific subfields having the same light emission state is controlled to be reduced.
- These specific subfields are subfields having a small luminance weight.
- the difference between the upper data before conversion and the upper data after conversion is distributed as an error signal to further lower data of the lower data. Since the average gradation value can be maintained by the dispersion of the error, it is possible to maintain almost the same brightness as the original image.
- 10A, 10B, 10C, 10D, and 10E are diagrams for explaining the operation of the data power conversion unit 63 of the plasma display device 100 according to the embodiment of the present invention.
- the image data output when the image signal of the checkered pattern shown in FIG. 6A is input is shown.
- the gradation value “3” of the image signal corresponding to the discharge cell in the column of the data electrode Dj-2 in the line of the scan electrode SCi-2 corresponds to the discharge cell in the line of the scan electrode SCi-1 as the lower data.
- the gradation value “12” of the image signal to be compared. In this case, since the upper data is small, the gradation value “3”, that is, the image data “0011” is output as it is.
- the gradation value “12” of the image signal corresponding to the discharge cell in the column of the data electrode Dj-1 in the line of the scan electrode SCi-2 corresponds to the discharge cell in the line of the scan electrode SCi-1 as the lower data.
- the gradation value “3” of the image signal to be compared since the upper data is large, the image signal is converted so that the light emission state of a specific subfield having a small luminance weight is the same.
- the gradation value “15” is set so that the image data of the first SF and the second SF is the same as the image data of the lower data. And image data “1111” is output.
- the gradation value “12” of the image signal corresponding to the discharge cell in the column of the data electrode Dj-2 in the scan electrode SCi-1 line is compared with the gradation value “3” of the lower data.
- the tone value is converted to “15”.
- an error is added to the discharge cells of the scan electrode SCi + 1 line to obtain a gradation value “9”.
- the gradation value “3” of the image signal corresponding to the discharge cell in the column of the data electrode Dj ⁇ 1 is output as it is in the line of the scan electrode SCi ⁇ 1.
- the grayscale value “3” of the image signal corresponding to the discharge cell in the column of the data electrode Dj-2 is output as it is on the scan electrode SCi line.
- the data power converter 63 converts the gradation values shown in FIG. 10A by sequentially executing such signal processing.
- FIG. 10B shows the presence / absence of a write pulse in the LSB of the image data thus converted, that is, the first SF.
- FIGS. 10C, 10D, and 10E show the presence / absence of a write pulse in the second SF, the third SF, and the fourth SF, respectively.
- the address pulse is applied to all the scan electrodes, and the change in the voltage applied to the data electrodes is eliminated.
- the charge / discharge current of the data electrode drive circuit 42 is reduced, and the power consumption of the data electrode drive circuit 42 is reduced.
- the error caused by the conversion of the image data is diffused to the image data corresponding to other discharge cells, the average value of the gradation values to be displayed is maintained. As a result, it is possible to suppress a decrease in image display quality due to image data conversion.
- the data power conversion unit 63 can suppress the power consumption of the data electrode driving circuit 42 while suppressing the deterioration of the image display quality.
- the predetermined power threshold is, for example, 90% of the allowable power loss of each data driver IC used in the data electrode driving circuit 42.
- 90% of the minimum allowable power loss is set as a predetermined power threshold value.
- the write stop unit 64 in FIG. 9 stops the write operation of a specific subfield based on the output of the post-conversion power prediction unit 65 to ensure that the power consumption of the data electrode drive circuit 42 is equal to or lower than a predetermined power threshold value. It is provided in order to suppress it.
- the specific subfield in which the write stop unit 64 stops the write operation and the specific subfield in which the data power conversion unit 63 has the same light emission state are determined separately and do not necessarily indicate the same subfield. I don't mean.
- the write stop unit 64 sets all corresponding image data to “0” in order from the subfield with the smallest luminance weight. To "".
- the write stop unit 64 outputs the data power conversion unit 63 so as to stop the write operation for a specific subfield until the power predicted by the post-conversion power prediction unit 65 falls below a predetermined power threshold value. Since the image data is converted, the power consumption of the data electrode drive circuit 42 can be reliably made to be equal to or lower than a predetermined power threshold value. However, this conversion process also reduces the image display quality.
- the sequential writing processing circuit 51 converts the image data output from the image data conversion circuit 50 into image data in which the power consumption of the data electrode driving circuit 42 is equal to or less than the power threshold value.
- the image display quality is greatly reduced by this conversion process.
- the interlaced write processing circuit 52 includes an interlaced write array unit 71, a second pre-conversion power prediction unit 72 (hereinafter referred to as “pre-conversion power prediction unit 72”), and a second data power conversion unit 73 (hereinafter referred to as “power conversion unit 72”).
- pre-conversion power prediction unit 72 a second pre-conversion power prediction unit 72
- power conversion unit 72 a second data power conversion unit 73
- a "data power conversion unit 73" a second write stop unit 74 (hereinafter referred to as "write stop unit 74")
- write stop unit 74 write stop unit 74
- a second converted power prediction unit 75 hereinafter referred to as "converted power prediction”
- the interlaced writing array unit 71 converts the image data output from the image data conversion circuit 50 into image data having an array corresponding to the interlaced writing operation.
- image data for one field is taken into the memory, and scan electrodes SC1, SC3, SC5,..., SCn-1, SC2, SC4, SC6,. Output image data.
- the circuit configurations of the pre-conversion power prediction unit 72, the data power conversion unit 73, the write stop unit 74, and the post-conversion power prediction unit 75 are respectively the pre-conversion power prediction unit 62 and the data power conversion unit in the sequential write processing circuit 51 described above. 63, the write stop unit 64, and the converted power prediction unit 65. However, since the interlace writing array unit 71 outputs corresponding image data in the order of scan electrodes SC1, SC3, SC5,..., SCn-1, SC2, SC4, SC6,. Each of the prediction unit 72, the data power conversion unit 73, the write stop unit 74, and the post-conversion power prediction unit 75 performs image data processing in this order.
- the pre-conversion power prediction unit 72 and the post-conversion power prediction unit 75 exclude the pixels above, two below, and left and right of the pixel for each bit of the image data corresponding to each subfield.
- the power required to drive the data electrodes D1 to Dm is predicted. That is, the pre-conversion power predicting unit 72 predicts the power consumption of the data electrode driving circuit 42 based on the image signal output from the interlaced writing array unit 71.
- the operation of the data power conversion unit 73 outputs the upper data as it is when the gradation value of the upper data is smaller than the gradation value of the lower data, similarly to the data power conversion unit 63. Further, when the gradation value of the upper data is larger than the gradation value of the lower data, the upper data and the lower data are set so that the light emission state of a specific subfield with a small luminance weight is the same. Convert and output data. However, the lower data corresponds to the pixel two pixels below the pixel. That is, the data power conversion unit 73 converts the image signal output from the interlaced writing array unit 71 for a specific subfield into image data with low power consumption of the data electrode driving circuit 42.
- the second address stopping unit 74 converts the output of the data power converting unit 73 so as to stop the addressing operation for a specific subfield until the power consumption of the data electrode driving circuit 42 becomes a predetermined power threshold value or less. To do.
- the post-conversion power prediction unit 75 predicts the power consumption of the data electrode drive circuit 42 based on the image data output from the write stop unit 74.
- the number of specific subfields having the same light emission state is determined based on the output of the maximum value selection circuit 59 as in the case of the data power conversion unit 63. Therefore, the number of specific subfields in which the data power conversion unit 73 has the same light emission state is always equal to the number of specific subfields in which the data power conversion unit 63 has the same light emission state.
- the interlaced write processing circuit 52 also converts the image data output from the image data conversion circuit 50 into image data in which the power consumption of the data electrode drive circuit 42 is equal to or less than the power threshold value, similarly to the sequential write processing circuit 51. .
- the image display quality is greatly lowered by this conversion process.
- FIG. 11 is a diagram for explaining the operation of the image data determination unit 56 of the plasma display device 100 in the embodiment of the present invention shown in FIG.
- the image data determination unit 56 determines the number of specific subfields in which the write stop unit 64 of the sequential write processing circuit 51 has stopped the write operation (the image data is all converted to “0”) and the write of the interlaced write processing circuit 52.
- the stopping unit 74 compares the number of specific subfields in which the writing operation has been stopped (image data is all converted to “0”). Since the image display quality is better as the number of specific subfields for which the writing operation is stopped is smaller, the image data determination unit 56 performs the writing operation among the outputs of the sequential writing processing circuit 51 and the interlaced writing processing circuit 52. The output with the smaller number of specific subfields stopped is determined as the output to be selected.
- the image display quality is considered to be comparable, so that either the output of the sequential write processing circuit 51 or the output of the interlaced write processing circuit 52 is output. You may choose.
- the image data determination unit 56 sequentially calculates the total power consumption predicted by the post-conversion power prediction unit 65 of the writing processing circuit 51. And the total power consumption predicted by the post-conversion power prediction unit 75 of the interlace write processing circuit 52 is compared.
- the image data determination unit 56 determines that the output with the lower total power consumption is the output to be selected, among the output of the sequential write processing circuit 51 and the output of the interlaced write processing circuit 52. In this way, when the image display quality is comparable, it is possible to select image data with less total power consumption of the data electrode drive circuit 42.
- the image data selection unit 57 sequentially selects either the output of the write processing circuit 51 or the output of the interlace write processing circuit 52 according to the determination result of the image data determination unit 56.
- the timing generation circuit 45 in FIG. Based on the determination result of 56, various timing signals for generating an appropriate drive voltage waveform are generated.
- the image signal processing circuit 41 converts the image data so that the power consumption of the data electrode driving circuit 42 is not more than a predetermined threshold value without greatly reducing the image display quality.
- the maximum value selection circuit 59 includes the output of the pre-conversion power prediction unit 62 and the output of the pre-conversion power prediction unit 72. The larger one is selected and output to the data power converter 63 and the data power converter 73. Then, the data power conversion unit 63 and the data power conversion unit 73 perform image data conversion based on the output of the maximum value selection circuit 59 while always equalizing the number of specific subfields having the same light emission state. become. This is considered that the image display quality of the image data output from the data power conversion unit 63 and the image data output from the data power conversion unit 73 are comparable.
- the image data selection circuit 54 outputs the image data. Even if the switching is performed, a feeling of strangeness such as flicker accompanying switching of image data hardly occurs.
- the plasma display device of the present invention has an effect that the power consumption can be controlled to a predetermined threshold value or less without generating flicker or the like and without greatly reducing the image display quality. It is useful as a display device.
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Abstract
Description
21 前面基板
22 走査電極
23 維持電極
24 表示電極対
25 誘電体層
26 保護層
31 背面基板
32 データ電極
33 誘電体層
34 隔壁
35 蛍光体層
41 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
50 画像データ変換回路
51 順次書込み処理回路
52 飛越書込み処理回路
55 画像データ選択回路
56 画像データ判定部
57 画像データ選択部
59 最大値選択回路
61 順次書込み配列部
62 (第1の)変換前電力予測部
63 (第1の)データ電力変換部
64 (第1の)書込み停止部
65 (第1の)変換後電力予測部
71 飛越書込み配列部
72 (第2の)変換前電力予測部
73 (第2の)データ電力変換部
74 (第2の)書込み停止部
75 (第2の)変換後電力予測部
100 プラズマディスプレイ装置
Vs 維持パルス電圧
Cd 電極間容量
Cs 電極間容量
図1は、本発明の実施の形態に用いるパネル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が形成されている。その誘電体層25上に保護層26が形成されている。背面基板31上にはデータ電極32が複数形成されている。そして、データ電極32を覆うように誘電体層33が形成されている。さらに、その誘電体層33上に井桁状の隔壁34が形成されている。そして、隔壁34の側面および誘電体層33上には、赤色、緑色および青色の各色に発光する蛍光体層35が設けられている。
Claims (2)
- 走査電極および維持電極からなる表示電極対と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、
前記走査電極に順に走査パルスを印加するとともに前記データ電極に書込みパルスを印加する順次書込み動作または前記走査電極に1つおきに走査パルスを印加するとともに前記データ電極に書込みパルスを印加する飛越書込み動作を行う書込み期間と、書込み動作を行った放電セルを発光させ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、前記走査電極、前記維持電極、前記データ電極をそれぞれ駆動する走査電極駆動回路、維持電極駆動回路、データ電極駆動回路と、
入力した画像信号を前記データ電極駆動回路に入力する画像データに変換する画像信号処理回路と、を備えたプラズマディスプレイ装置であって、
前記画像信号処理回路は、
前記画像信号をサブフィールド毎の前記放電セルの発光・非発光を示す画像データに変換する画像データ変換回路と、
前記画像データ変換回路の出力した画像データを前記順次書込み動作に対応した画像データに変換する順次書込み処理回路と、
前記画像データ変換回路の出力した画像データを前記飛越書込み動作に対応した画像データに変換する飛越書込み処理回路と、
前記順次書込み処理回路および前記飛越書込み処理回路のいずれかの出力を選択する画像データ選択回路と、を備え、
前記順次書込み処理回路は、
前記画像データ変換回路の出力した画像信号を前記順次書込み動作に対応して配列する順次書込み配列部と、
前記順次書込み配列部の出力した画像信号に基づき前記データ電極駆動回路の消費電力を予測する第1の変換前電力予測部と、
特定のサブフィールドに対する前記順次書込み配列部の出力した画像データを前記データ電極駆動回路の消費電力の少ない画像データに変換する第1のデータ電力変換部と、
前記データ電極駆動回路の消費電力が所定の電力しきい値以下になるまで特定のサブフィールドに対する書込み動作を停止するように前記第1のデータ電力変換部の出力した画像データを変換する第1の書込み停止部と、
前記第1の書込み停止部の出力した画像データに基づき前記データ電極駆動回路の消費電力を予測する第1の変換後電力予測部と、を有し、
前記飛越書込み処理回路は、
前記画像データ変換回路の出力した画像信号を前記飛越書込み動作に対応して配列する飛越書込み配列部と、
前記飛越書込み配列部の出力した画像信号に基づき前記データ電極駆動回路の消費電力を予測する第2の変換前電力予測部と、
特定のサブフィールドに対する前記飛越書込み配列部の出力した画像信号を前記データ電極駆動回路の消費電力の少ない画像データに変換する第2のデータ電力変換部と、
前記データ電極駆動回路の消費電力が所定の電力しきい値以下になるまで特定のサブフィールドに対する書込み動作を停止するように前記第2のデータ電力変換部の出力した画像データを変換する第2の書込み停止部と、
前記第2の書込み停止部の出力した画像データに基づき前記データ電極駆動回路の消費電力を予測する第2の変換後電力予測部と、を有し、
前記画像信号処理回路は、
前記第1のデータ電力変換部が前記データ電極駆動回路の消費電力の少ない画像データに変換する特定のサブフィールドの数と、
前記第2のデータ電力変換部が前記データ電極駆動回路の消費電力の少ない画像データに変換する特定のサブフィールドの数と、
を等しくすることを特徴とするプラズマディスプレイ装置。 - 前記第1のデータ電力変換部および前記第2のデータ電力変換部が前記データ電極駆動回路の消費電力の少ない画像データに変換する特定のサブフィールドの数は、前記第1の変換前電力予測部が予測した電力と前記第2の変換前電力予測部が予測した電力との大きいほうの電力に基づき設定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。
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WO2012098902A1 (ja) * | 2011-01-20 | 2012-07-26 | パナソニック株式会社 | 画像表示装置および画像表示装置の駆動方法 |
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- 2009-01-30 US US12/743,408 patent/US8508555B2/en not_active Expired - Fee Related
- 2009-01-30 JP JP2009521263A patent/JP5152184B2/ja not_active Expired - Fee Related
- 2009-01-30 CN CN2009801000612A patent/CN101772795B/zh not_active Expired - Fee Related
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KR101445338B1 (ko) | 2009-12-24 | 2014-10-01 | 주식회사 오리온 | 플라즈마 디스플레이 패널의 구동 장치 및 방법 |
WO2011089887A1 (ja) * | 2010-01-19 | 2011-07-28 | パナソニック株式会社 | プラズマディスプレイパネルの駆動方法およびプラズマディスプレイ装置 |
JPWO2011089887A1 (ja) * | 2010-01-19 | 2013-05-23 | パナソニック株式会社 | プラズマディスプレイパネルの駆動方法およびプラズマディスプレイ装置 |
WO2012098902A1 (ja) * | 2011-01-20 | 2012-07-26 | パナソニック株式会社 | 画像表示装置および画像表示装置の駆動方法 |
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US9659518B2 (en) | 2014-08-20 | 2017-05-23 | Samsung Display Co., Ltd. | Display panel and display apparatus having interlace and progressive driving methods |
Also Published As
Publication number | Publication date |
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CN101772795A (zh) | 2010-07-07 |
JP5152184B2 (ja) | 2013-02-27 |
CN101772795B (zh) | 2012-05-02 |
US20100265276A1 (en) | 2010-10-21 |
US8508555B2 (en) | 2013-08-13 |
JPWO2009096186A1 (ja) | 2011-05-26 |
KR101016167B1 (ko) | 2011-02-17 |
KR20100007979A (ko) | 2010-01-22 |
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