WO2008072458A1 - プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 - Google Patents
プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 Download PDFInfo
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- WO2008072458A1 WO2008072458A1 PCT/JP2007/072648 JP2007072648W WO2008072458A1 WO 2008072458 A1 WO2008072458 A1 WO 2008072458A1 JP 2007072648 W JP2007072648 W JP 2007072648W WO 2008072458 A1 WO2008072458 A1 WO 2008072458A1
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- plasma display
- scan electrode
- initialization
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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
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
-
- 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
- G09G3/292—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 reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
- G09G3/2927—Details of initialising
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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
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
-
- 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
- G09G2320/0228—Increasing the driving margin in plasma displays
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/048—Preventing or counteracting the effects of ageing using evaluation of the usage time
-
- 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
- G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
-
- 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
Definitions
- the present invention relates to a plasma display device and a plasma display panel driving method.
- the present invention relates to a plasma display device used for a wall-mounted television or a large monitor, and a method for driving a plasma display panel.
- a typical AC surface discharge type panel as a plasma display panel (hereinafter abbreviated as “panel”) has a large number of discharge cells formed between a front plate and a back plate arranged opposite to each other. Yes.
- a plurality of pairs of display electrodes consisting of a pair of scan electrodes and sustain electrodes are formed on the front glass substrate in parallel with each other, and a dielectric layer and a protective layer are formed so as to cover the display electrode pairs.
- the back plate is formed with a plurality of parallel data electrodes on the back glass substrate, a dielectric layer so as to cover them, and a plurality of partition walls formed in parallel with the data electrodes on the back side glass substrate.
- a phosphor layer is formed on the surface and the side surfaces of the barrier ribs. Then, the front plate and the back plate are arranged opposite each other and sealed so that the display electrode pair and the data electrode are three-dimensionally crossed, and a discharge gas containing, for example, 5% xenon in a partial pressure ratio is sealed in the internal discharge space. It has been done.
- a discharge cell is formed in a portion where the display electrode pair and the data electrode face each other. In the panel having such a configuration, ultraviolet rays are generated by gas discharge in each discharge cell, and phosphors of red (R), green (G) and blue (B) colors are excited and emitted by the ultraviolet rays. Make a display.
- a subfield method that is, a method of performing gradation display by combining subfields to emit light after dividing one field period into a plurality of subfields is generally used. /!
- Each subfield has an initialization period, an address period, and a sustain period.
- an address pulse voltage is selectively applied to the discharge cells to be displayed to generate an address discharge to form wall charges ( Hereinafter, this operation is also referred to as “writing”).
- a sustain pulse voltage is alternately applied to the display electrode pair consisting of the scan electrode and the sustain electrode, and a sustain discharge is generated in the discharge cell that caused the address discharge, and the phosphor layer of the corresponding discharge cell emits light.
- the initializing discharge is performed using a slowly changing voltage waveform, and further the initializing discharge is selectively performed on the discharge cells that have been subjected to the sustain discharge, so A novel driving method is disclosed in which light emission not related to display is minimized and the contrast ratio is improved.
- an initialization operation (hereinafter referred to as “all-cell initialization”) is performed in which all discharge cells generate initialization discharges. (Referred to as “selective initialization operation”), which generates an initializing discharge only in the discharge cells that have undergone a sustain discharge during the initializing period of other subfields. Abbreviated as “)”.
- selective initialization operation which generates an initializing discharge only in the discharge cells that have undergone a sustain discharge during the initializing period of other subfields.
- black luminance is the initial value of all cells.
- Image display with high contrast is possible with only weak light emission in the digitizing operation (for example, see Patent Document 1)
- the pulse width of the last sustain pulse in the sustain period is made shorter than that of other sustain pulses, and the potential difference due to the wall charges between the display electrode pairs is reduced. It also describes a so-called narrow erase discharge that relaxes. By stably generating this narrow erase discharge, a reliable write operation can be performed in the subsequent sub-field write period, and power S can be achieved to realize a plasma display device with a high contrast ratio.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-242224
- a plasma display device of the present invention includes a panel including a plurality of discharge cells each having a display electrode pair composed of a scan electrode and a sustain electrode, an accumulated time measuring circuit for measuring an accumulated time of time when the panel is energized, A plurality of subfields having an initialization period in which a gradually decreasing ramp waveform voltage is applied to the scan electrode, an address period in which a negative scan pulse voltage is applied to the scan electrode, and a sustain period are provided in one field period, and initialization is performed. And a scan electrode drive circuit that generates a ramp waveform voltage for the period V to initialize the discharge cell and generates a scan noise voltage for the address period to drive the scan electrode.
- the scan electrode drive circuit is configured to change the minimum voltage of the ramp waveform voltage that gradually falls according to the accumulated time measured by the accumulated time measuring circuit.
- the minimum voltage of the falling ramp waveform voltage generated in the initialization period is changed according to the accumulated time of energizing the panel.
- the cumulative energization time of the panel is increased, stable address discharge can be generated without increasing the address pulse voltage.
- FIG. 1 is an exploded perspective view showing a structure of a panel according to Embodiment 1 of the present invention.
- FIG. 2 is an electrode array diagram of the panel.
- FIG. 3 is a drive voltage waveform diagram applied to each electrode of the panel.
- FIG. 4 is a diagram showing a sub-field configuration of the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 5A is a diagram showing drive power applied to the scan electrodes when the cumulative energization time of the panel measured by the cumulative time measurement circuit in Embodiment 1 of the present invention is a predetermined time or less. It is a wave form diagram of a pressure waveform.
- FIG. 5B is a waveform diagram of a drive voltage waveform applied to the scan electrode after the cumulative energization time of the panel exceeds a predetermined time as measured by the cumulative time measurement circuit according to Embodiment 1 of the present invention. It is.
- Fig. 6 is a diagram showing the relationship between the panel energization cumulative time and the write-in voltage Vd necessary for generating a stable write discharge in the first embodiment of the present invention.
- FIG. 7 is a diagram showing the relationship between initialization voltage Vi4 and address noise voltage Vd necessary for generating stable address discharge in the first embodiment of the present invention.
- FIG. 8 is a circuit block diagram of the plasma display device in accordance with the first exemplary embodiment of the present invention.
- FIG. 9 is a circuit diagram of a scan electrode driving circuit according to the first embodiment of the present invention.
- FIG. 10 is a timing chart for explaining an example of the operation of the scan electrode driving circuit in the all-cell initializing period in the first embodiment of the present invention.
- FIG. 11 is a timing chart for explaining another example of the operation of the scan electrode driving circuit in the all-cell initializing period in the first embodiment of the present invention.
- FIG. 12A shows an example of a subfield configuration in the second embodiment of the present invention.
- FIG. 12B shows another example of the subfield configuration in Embodiment 2 of the present invention.
- FIG. 13A shows an example of a subfield configuration having three initialization voltages Vi4 in the second embodiment of the present invention.
- FIG. 13B is a diagram showing another example of a subfield configuration having three initialization voltages Vi4 in the second embodiment of the present invention.
- FIG. 1 is an exploded perspective view showing the structure of panel 10 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 plate 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.
- the protective layer 26 has been used as a panel material in order to lower the discharge start voltage in the discharge cell, and emits secondary electrons when encapsulating neon (Ne) and xenon (Xe) gas. It is made of a material mainly composed of MgO with a large coefficient and excellent durability.
- a plurality of data electrodes 32 are formed on the back plate 31, a dielectric layer 33 is formed so as to cover the data electrodes 32, and a grid-like partition wall 34 is further formed thereon. 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 (R), green (G), and blue (B) is provided.
- the front plate 21 and the back plate 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, and the outer peripheral portion thereof is sealed with glass frit or the like. Sealed with material.
- a mixed gas of neon and xenon is sealed as a discharge gas.
- a discharge gas with a xenon partial pressure of about 10% is used to improve luminance.
- the discharge space is partitioned into a plurality of sections by partition walls 34, and discharge cells are formed at the portions where the display electrode pairs 24 and the data electrodes 32 intersect. These discharge cells discharge and emit light to display an image.
- the structure of the panel 10 is not limited to that described above, and may be, for example, a structure having a stripe-shaped partition wall.
- the mixing ratio of the discharge gas is limited to that described above. Other mixing ratios may be used.
- FIG. 2 is an electrode array diagram of panel 10 in accordance with the first exemplary embodiment of the present invention.
- n scan electrodes SC1 to SCn (scan electrode 22 in FIG. 1) and n sustain electrodes SU1 to SUn (sustain electrode 23 in FIG. 1) arranged in the row direction are arranged.
- m data electrodes D1 to Dm (data electrodes 32 in FIG. 1) that are long in the column direction are arranged.
- M x n are formed inside.
- the plasma display device in this embodiment is divided into subfield methods, that is, one field period is divided into a plurality of subfields, and gradation display is performed by controlling light emission / non-light emission of each discharge cell for each subfield. Do.
- Each subfield has an initialization period, an address period, and a sustain period.
- an initializing discharge is generated in the initializing period, and wall charges necessary for the subsequent address discharge are formed on each electrode.
- the initializing operation at this time includes all-cell initializing operation in which initializing discharge is generated in all discharge cells and selective initializing in which initializing discharge is generated in the discharge cell in which the sustain discharge has been performed in the previous subfield. There is an operation.
- an address discharge is selectively generated in the discharge cells to emit light in the subsequent sustain period to form wall charges.
- a number of sustain pulses proportional to the luminance weight are alternately applied to the display electrode pair 24, and a sustain discharge is generated in the discharge cell that generated the address discharge to emit light.
- the proportionality constant at this time is called “luminance magnification”.
- one field is divided into 10 subfields (first SF, second SF,...
- each subfield has a luminance weight of (1, 2, 3, 6, 11, 18, 30, 44, 60, 80), for example. Then, the all-cell initialization operation is performed in the initialization period of the first SF, and the selective initialization operation is performed in the initialization period of the second SF to the tenth SF. In the sustain period of each subfield, each subfield is A number of sustaining noises is applied to each of the display electrode pairs 24 by multiplying the luminance weight of the field by a predetermined luminance magnification.
- the number of subfields and the luminance weight of each subfield are not limited to the above values, and even if the subfield configuration is switched based on an image signal or the like.
- scan electrode SC1 to scan electrode SCn generated in the initialization period according to the accumulated time of the time when power is supplied to panel 10 measured by the accumulated time measuring circuit described later. Controls the minimum voltage of the slowly falling ramp waveform voltage to be applied. Specifically, after the cumulative energization time of panel 10 exceeds a predetermined time, the ramp voltage with a gradually decreasing ramp waveform is set to the lowest voltage value during the initialization period of all subfields. A waveform voltage is generated. As a result, it is possible to generate a stable address discharge without increasing the voltage required to generate the address discharge.
- FIG. 3 is a waveform diagram of drive voltage applied to each electrode of panel 10 according to Embodiment 1 of the present invention.
- FIG. 3 shows driving voltage waveforms of two subfields, that is, a subfield that performs an all-cell initializing operation (hereinafter referred to as an “all-cell initializing subfield”) and a subfield that performs a selective initializing operation (
- all-cell initializing subfield a subfield that performs an all-cell initializing operation
- selective initializing operation hereinafter, the force indicating “selective initialization subfield” and the drive voltage waveforms in the other subfields are substantially the same.
- 0 (V) is applied to each of the data electrode D1 to the data electrode Dm and the sustain electrode SU1 to the sustain electrode SUn, and the sustain is applied to the scan electrode SC1 to the scan electrode SCn.
- a ramp waveform voltage (hereinafter referred to as “up-ramp waveform voltage”) that gradually increases from voltage Vil below discharge start voltage to voltage Vi2 exceeding discharge start voltage with respect to electrode SU1 to sustain electrode SUn. Apply.
- the panel 10 is driven by switching the voltage value of the initialization voltage Vi4 between two different voltage values.
- the higher voltage value is denoted as Vi4H
- the lower voltage value is denoted as Vi4L.
- the voltage value of initialization voltage Vi4 is set to Vi4L in the initialization period of all subfields.
- the system is configured to perform initialization using the down-ramp waveform voltage. Details of this configuration will be described later. As a result, it is possible to generate a stable address discharge without increasing the address noise voltage Vd when the energized cumulative time increases.
- voltage Ve2 is applied to sustain electrode SU1 through sustain electrode SUn
- voltage Vc is applied to scan electrode SC1 through scan electrode SCn.
- a negative scan pulse voltage Va is applied to the scan electrode SCI in the first row
- the data electrode D k (k of the discharge cell to be lit in the first row among the data electrodes D1 to Dm.
- the voltage difference at the intersection between the data electrode Dk and the scan electrode SC1 is the difference between the wall voltage on the data electrode Dk and the scan electrode SC1.
- the address operation is performed in which the address discharge is caused in the discharge cell to emit light in the first row and the wall voltage is accumulated on each electrode.
- the voltage at the intersection of data electrode D1 to data electrode Dm and scan electrode SC1 to which address pulse voltage Vd has not been applied does not exceed the discharge start voltage, so address discharge does not occur.
- the above address operation is performed until the discharge cell in the nth row, and the address period ends.
- a sustain discharge occurs between scan electrode SCi and sustain electrode SUi, and phosphor layer 35 emits light by the ultraviolet rays generated at this time. Then, a negative wall voltage is accumulated on scan electrode SCi, and a positive wall voltage is accumulated on sustain electrode SUi. In addition, a positive wall voltage is accumulated on the data electrode Dk. In the discharge cells where no address discharge has occurred during the address period, no sustain discharge occurs, and the wall voltage at the end of the initialization period is maintained.
- the number of sustain pulses obtained by multiplying the brightness weight by the brightness magnification is applied alternately to scan electrode SC1 to scan electrode SCn and sustain electrode SU1 to sustain electrode SUn, and the potential difference between the electrodes of display electrode pair 24 is applied.
- the sustain discharge is continuously performed in the discharge cells that have caused the address discharge in the address period.
- the voltage Vel is applied to the sustain electrode SU1 to the sustain electrode SUn, and O (V) is applied to the data electrode D1 to the data electrode Dm. Apply a downward ramp waveform voltage that gradually decreases toward the voltage Vi3 'force initialization voltage Vi4 to the electrode SCn.
- a weak initializing discharge is generated in the discharge cell that has caused the sustain discharge in the sustain period of the previous subfield, and the wall voltage on scan electrode SCi and sustain electrode SUi is weakened.
- the wall voltage on scan electrode SCi and sustain electrode SUi is weakened.
- a sufficient positive wall voltage is accumulated on the data electrode Dk by the last sustain discharge, so that an excessive portion of the wall voltage is discharged and suitable for the write operation. Adjusted to the wall voltage.
- the selective initializing operation is an operation for selectively performing initializing discharge on the discharge cells that have undergone the sustain operation in the sustain period of the immediately preceding subfield.
- the all-cell initialization operation is performed even in the selective initialization operation.
- the initialization voltage Vi4 is switched between Vi4 H, which has a higher voltage value, and Vi4L, which has a lower voltage value!
- the operation in the subsequent address period is the same as the operation in the address period of the all-cell initializing subfield, and thus the description thereof is omitted.
- the operation in the subsequent sustain period is the same except for the number of sustain pulses.
- the initialization period operation is the same selective initialization operation as the 2nd SF
- the write period write operation is the same as the 2nd SF
- the sustain period operation is the same as the maintenance SF. The same is true except for the number.
- FIG. 4 is a diagram showing a subfield configuration of the plasma display device in accordance with the first exemplary embodiment of the present invention.
- Fig. 4 is a schematic representation of the driving waveform between one field in the subfield method, and the driving voltage waveform in each subfield is equivalent to the driving voltage waveform in Fig. 3.
- the subfield configuration in this embodiment that is, one field is divided into 10 subfields (first SF, second SF,..., 10th SF), and each subfield is divided. It shows the subfield structure with luminance weights of Finored (each (1, 2, 3, 6, 11, 18, 30, 44, 60, 80), and the first SF is the all-cell initialization subfield.
- the second SF to the 10th SF are selective initialization subfields, and during the sustaining period of each subfield, the number of sustaining noises obtained by multiplying the luminance weight of each subfield by a predetermined luminance magnification is the number of display electrode pairs. Apply to each of 24.
- FIG. 5 is a waveform diagram of drive voltage waveforms applied to scan electrode SC1 through scan electrode SCn in the first embodiment of the present invention.
- FIG. 5A is a waveform diagram when the cumulative energization time of panel 10 measured by the cumulative time measurement circuit is less than a predetermined time (in this embodiment, 500 hours or less), and
- FIG. 5B is the cumulative energization time. It is a waveform diagram after exceeding a predetermined time (in this embodiment, more than 500 hours).
- the initialization voltage Vi4 that is the lowest voltage of the down-ramp waveform voltage is set to two different voltages, that is, the higher voltage! / Low / !, Vi4L can be switched to generate down-ramp waveform voltage! / Then, the voltage value of the initialization voltage Vi4 is switched between Vi4L and Vi4H depending on whether or not the cumulative energization time of the panel 10 measured by an accumulation time measuring circuit described later is a predetermined time or less.
- the cumulative time measurement circuit determines that the cumulative energization time of panel 10 is 500 hours or less, as shown in FIG. 5A, during the initialization period of all subfields! / Then, generate a down-ramp waveform voltage with the initialization voltage Vi4 set to Vi4H to perform initialization.
- Initialization voltage Vi4 is set to Vi4L to generate a down-ramp waveform voltage for initialization.
- such a configuration realizes stable address discharge. This is due to the following reason.
- FIG. 6 is a diagram showing a relationship between the panel energization cumulative time and the address nose voltage Vd necessary for generating a stable address discharge in the first embodiment of the present invention.
- the vertical axis represents the address pulse voltage Vd required to generate a stable address discharge
- the horizontal axis represents the cumulative energization time of panel 10.
- the address pulse voltage Vd necessary for generating a stable write discharge increases as the cumulative energization time of panel 10 increases.
- the required write pulse voltage Vd is approximately 60 (V)
- the necessary write pulse voltage Vd is It rises by about 73 (V) and about 13 (V).
- the required write noise voltage Vd becomes approximately 75 (V), and there is almost no change.
- the initializing discharge is generated by applying the downward ramp waveform voltage to scan electrode SC1 through scan electrode SCn. Therefore, the state of the wall charge formed on each electrode also changes according to the voltage value of the initialization voltage Vi4 having the lowest down-ramp waveform voltage, and the applied voltage necessary for the subsequent address discharge also changes. And there is the following relationship between them.
- FIG. 7 is a diagram showing a relationship between initialization voltage Vi4 and address pulse voltage Vd necessary for generating a stable address discharge in Embodiment 1 of the present invention.
- the vertical axis represents the address noise voltage Vd required to generate a stable address discharge
- the horizontal axis represents the initialization voltage Vi4.
- the write-on voltage Vd required to generate a stable write discharge also changes according to the voltage of the initialization voltage Vi4.
- the address noise voltage Vd required to generate the address discharge is also reduced.
- the write pulse voltage when the initialization voltage Vi4 is about —90 (V) is about 66 (V)
- Vd is about 50 (V)
- the write noise voltage Vd required to generate a stable write discharge is about 16 (V) Lower.
- the ramp-down waveform voltage is generated with the initialization voltage Vi4 set to Vi4H, and after the energized cumulative time exceeds a predetermined time (in this embodiment, , More than 500 hours), as shown in FIG. 5B, the initialization voltage Vi4 is set to Vi4L having a voltage value lower than Vi4H to generate the down-ramp waveform voltage.
- Vi4L is set to ⁇ 95 (V) and Vi4H is set to 90 (V), which is 5 (V) higher than Vi4L, in consideration of the amplitude of the necessary pulse voltage.
- FIG. 8 is a circuit block diagram of the plasma display device in accordance with the first exemplary embodiment of the present invention.
- Plasma display device 1 is required for panel 10, image signal processing circuit 41, data electrode drive circuit 42, scan electrode drive circuit 43, sustain electrode drive circuit 44, timing generation circuit 45, cumulative time measurement circuit 48, and each circuit block
- a power supply circuit (not shown) for supplying a proper power supply is provided.
- the image signal processing circuit 41 converts the input image signal sig into image data indicating light emission / non-light emission for each subfield.
- the data electrode drive circuit 42 converts the image data for each subfield into signals corresponding to the data electrodes D1 to Dm, and drives the data electrodes D1 to Dm.
- the accumulated time measuring circuit 48 has a generally known timer 81 having an integration function in which a numerical value increases by a certain amount per unit time during the energization period of the panel 10.
- the measurement time force is accumulated without being set, so that the accumulated time of the energization time of the panel 10 can be measured.
- the accumulated time measuring circuit 48 compares the energized accumulated time of the panel 10 measured by the timer 81 with a predetermined threshold value to determine whether or not the accumulated energized time of the panel 10 exceeds a predetermined time, Represents the result of the judgment
- the signal is output to the timing generation circuit 45.
- the force that sets this threshold value to 500 hours is not limited to this value, but based on the panel characteristics and the specifications of the plasma display device! / Desirable to set to the optimal value.
- the timing generation circuit 45 has various timing signals for controlling the operation of each circuit block based on the horizontal synchronization signal H, the vertical synchronization signal V, and the accumulated energization time of the panel 10 measured by the accumulated time measurement circuit 48. Is supplied to each circuit block.
- the initialization voltage Vi4 of the down-ramp waveform voltage applied to scan electrode SC1 through scan electrode SCn in the initialization period is controlled based on the accumulated energization time. Therefore, a timing signal corresponding thereto is output to the scan electrode drive circuit 43. Thus, control for stabilizing the write operation is performed.
- Scan electrode drive circuit 43 is an initialization waveform generating circuit for generating an initialization waveform voltage to be applied to scan electrode SC1 through scan electrode SCn in the initialization period, and scan electrode SC1 through scan electrode SCn in the sustain period.
- Sustain electrode drive circuit 44 includes a sustain noise generation circuit and circuits for generating voltages Vel and Ve2, and drives sustain electrode SU1 through sustain electrode SUn based on a timing signal.
- FIG. 9 is a circuit diagram of scan electrode drive circuit 43 in the first exemplary embodiment of the present invention.
- Scan electrode driving circuit 43 includes sustain pulse generating circuit 50 for generating a sustain pulse, initialization waveform generating circuit 53 for generating an initialization waveform, and scan pulse generating circuit 54 for generating a scan pulse.
- the maintenance noise generation circuit 50 includes a power recovery circuit 51 and a clamp circuit 52.
- the power recovery circuit 51 includes a power recovery capacitor Cl, a switching element Ql, a switching element Q2, a backflow prevention diode Dl, a diode D2, and a resonance inductor L1.
- the power recovery capacitor C1 is sufficiently larger than the interelectrode capacitance Cp. It has a capacity and is charged to approximately Vs / 2, which is half of the voltage value Vs, so as to serve as a power source for the power recovery circuit 51.
- the clamp circuit 52 includes a switching element Q3 for clamping scan electrode SC1 to scan electrode SCn to voltage Vs, and a switching element Q4 for clamping scan electrode SCI to scan electrode SCn to O (V).
- the sustaining voltage Vs is generated based on the timing signal output from the timing generating circuit 45.
- the switching element Q1 when raising the sustain noise waveform, the switching element Q1 is turned on to resonate the interelectrode capacitance Cp and the inductor L1, and the switching element Ql and the diode Dl from the capacitor C1 for power recovery Then, power is supplied to scan electrode SCI to scan electrode SCn through inductor L1.
- switching element Q3 When the voltage of scan electrode SC1 to scan electrode SCn approaches Vs, switching element Q3 is turned on, and scan electrode SC1 to scan electrode SCn are set to voltage V.
- switching element Q2 Conversely, when the sustain noise waveform falls, switching element Q2 is turned on to resonate interelectrode capacitance Cp and inductor L1, and from interelectrode capacitance Cp to inductor Ll, diode D2, switching element Q2 The power is recovered through the power recovery capacitor C1.
- switching element Q4 When the voltage of scan electrode SC1 through scan electrode SCn approaches O (V), switching element Q4 is turned on, and scan electrode SC1 through scan electrode SCn are clamped at O (V).
- the initialization waveform generating circuit 53 includes a switching element Q11, a capacitor C10, and a resistor R10.
- the initialization waveform generating circuit 53 generates a rising ramp waveform voltage that gradually rises in a ramp shape up to the voltage Vi2, and includes a switching element Q14
- a mirror integration circuit that has a capacitor C12 and a resistor R11 and generates a ramp voltage waveform that gradually decreases in a ramp shape to a predetermined initialization voltage Vi4, a separation circuit using the switching element Q12, and a switching element Q13 The separation circuit used is provided.
- the initialization waveform described above is generated based on the timing signal output from the timing generation circuit 45, and the initialization voltage Vi4 is controlled in the all-cell initialization operation.
- the input terminals of the Miller integrating circuit are shown as input terminal INa and input terminal INb.
- a predetermined voltage for example, 15 (V)
- the input terminal INa is set to "Hi”.
- a direct current flows from the resistor R10 to the capacitor C10, and a constant current flows.
- the source voltage of the scanning element Ql l rises in a ramp shape, and the output voltage of the scan electrode drive circuit 43 also starts to rise in a ramp shape.
- a predetermined voltage for example, 15 (V)
- a constant current flows from the resistor R11 to the capacitor C12, the drain voltage of the switching element Q14 decreases in a ramp shape, and the output voltage of the scan electrode driving circuit 43 also starts to decrease in a ramp shape.
- the scan pulse generation circuit 54 switches the low voltage side of the switch circuit OUT ;! to OUTn and the switch circuit OUT;! To OUTn, which outputs a scanning pulse voltage to each of the scan electrode SC1 to the scan electrode SCn.
- Switching element Q21 for clamping to Va and switch circuit UT UT;! ⁇ Control circuit IC for controlling OUTn;! ⁇ ICn, voltage Vc superimposed on voltage Va and voltage Vc on switch circuit OUT ;! ⁇ Diode D21 and capacitor C21 for applying to the high voltage side of OUTn.
- Each of the switch circuits OUT ;! to OUTn includes switching elements QH;! To QHn for outputting the voltage Vc and switching elements QL;!
- Scan pulse generating circuit 54 outputs the voltage waveform of initializing waveform generating circuit 53 during the initializing period and the voltage waveform of sustaining pulse generating circuit 50 during the sustaining period.
- Scanning noise generation circuit 54 includes AND gate AG that performs a logical product operation, and comparator CP that compares the magnitudes of the input signals input to the two input terminals.
- the comparator CP compares the voltage (Va + Vset2) with the voltage Vset2 superimposed on the voltage Va and the drive waveform voltage, and the drive waveform voltage is higher than the voltage (Va + Vset2)! “0” is output, otherwise “1” is output.
- Two input signals, that is, the output signal (CEL1) of the comparator CP and the switching signal CEL2 are input to the AND gate AG.
- the switching signal CEL2 For example, a timing signal output from the timing generation circuit 45 can be used.
- the AND gate AG outputs “1” if any of the input signals is “1”, and outputs “0” otherwise. If the output of the AND gate AG is input to the control circuit IC ;! to ICn and the output force of the AND gate AG is 0 ”, the drive waveform voltage is output via the switching element QL ;! to QLn, and the output force S of the AND gate AG. If “l”, voltage Vc with voltage Vscn superimposed on voltage Va is output via switching element QH;! To QHn.
- the sustain pulse generating circuit of sustain electrode driving circuit 44 has the same configuration as sustain pulse generating circuit 50, and collects power when driving sustain electrode SU1 through sustain electrode SUn.
- the initialization waveform generation circuit 53 employs a Miller integration circuit using a FET that is practical and has a relatively simple configuration.
- the force S is limited to this configuration. Any circuit can be used as long as it can generate an up-ramp waveform voltage and a down-ramp waveform voltage.
- the operation of the initialization waveform generation circuit 53 and the method for controlling the initialization voltage Vi4 will be described with reference to the drawings.
- the operation when the initialization voltage Vi4 is rubbed with Vi4U is explained using FIG. 10, and then the operation when the initialization voltage Vi4 is made Vi4H is explained using FIG. 10 and 11, the drive waveform during the all-cell initialization operation is taken as an example to explain the control method of the initialization voltage Vi4.
- the initialization voltage Vi4 can be controlled.
- the drive voltage waveform for performing the all-cell initialization operation is divided into five periods indicated by periods T1 to T5, and each period will be described.
- voltage Vi1, voltage Vi3, and voltage Vi3 ' are equal to voltage Vs
- voltage Vi2 is equal to voltage Vr
- voltage Vi4L is equal to negative voltage Va
- voltage Vi4H is a negative voltage. It is assumed that it is equal to the voltage (Va + Vset2) obtained by superimposing the voltage Vset2 on Va. Therefore, the voltage Vi4H is higher than the scan noise voltage Va in the writing period, and the voltage The voltage Vi4L is equal to the scan noise voltage Va.
- the operation for turning on the switching element is indicated as ON, and the operation for interrupting the switching element is indicated as OFF.
- the signal to turn on the switching element is denoted as “Hi”
- the signal to be turned off is denoted as “Lo”
- the input signals CEL1 and CEL2 to the AND gate AG are also denoted as “1” as “Hi”.
- “0” is expressed as “Lo”.
- FIG. 10 shows a scan electrode driving circuit in the all-cell initializing period in the first embodiment of the present invention.
- the switching signal CEL2 is maintained at “0” in the period T1 to the period T5, and the switching element QL;! In other words, the voltage waveform of the initialization waveform generator circuit 53 is output as is.
- the switching element Q1 of the sustaining noise generating circuit 50 is turned on. Then, the interelectrode capacitance Cp and the inductor L1 resonate, and the voltage of the scan electrode SCI to the scan electrode SCn starts to rise from the capacitor C1 for power recovery through the switching element Ql, the diode Dl, and the inductor L1.
- switching element Q3 of sustaining noise generating circuit 50 is turned on. Then, voltage Vs is applied to scan electrode SC1 through scan electrode SCn through switching element Q3, and the potential of scan electrode SC1 through scan electrode SCn becomes voltage Vs (in this embodiment, equal to voltage Vil). .
- the input terminal INa of the Miller integrating circuit that generates the up-ramp waveform voltage is set to “Hi”. Specifically, for example, a voltage of 15 (V) is applied to the input terminal INa. As a result, a constant current flows from the resistor R10 to the capacitor C10, the source voltage of the switching element Q11 increases in a ramp shape, and the output voltage of the scan electrode driving circuit 43 also starts to increase in a ramp shape. This voltage increase continues while the input terminal INa is “Hi”.
- the voltage Vs (which is equal to the voltage Vil in the present embodiment) which is equal to or lower than the discharge start voltage is changed to a voltage Vr (which is equal to the voltage Vi2 in the present embodiment) exceeding the discharge start voltage.
- An up-ramp waveform voltage that gradually rises is applied to scan electrode SC1 through scan electrode SCn.
- the input terminal INb of the Miller integrating circuit that generates the down-ramp waveform voltage is set to “Hi”. Specifically, for example, a voltage of 15 (V) is applied to the input terminal INb. Then, a constant current flows from the resistor R11 force toward the capacitor C12, the drain voltage of the switching element Q14 decreases in a ramp shape, and the output voltage of the scan electrode driving circuit 43 starts to decrease in a ramp shape. After the output voltage reaches a predetermined negative voltage Vi4L, the input terminal INb is set to “Lo”. Specifically, for example, a voltage of 0 (V) is applied to the input terminal INb.
- the comparator CP compares the down-ramp waveform voltage with the voltage (Va + Vset2) obtained by adding the voltage Vset2 to the voltage Va, and the output signal from the comparator CP At time t4 when the lamp waveform voltage becomes lower than the voltage (Va + Vset2), it switches from “0” to “1”. However, since the switching signal CEL2 is maintained at “0” during the period T1 to the period T5, “0” is output from the AND gate AG. Therefore, the scan pulse generator circuit 54 outputs the down-ramp waveform voltage with the initialization voltage Vi4 set to the negative voltage Va, that is, Vi4L.
- Vi4L is assumed to be equal to the negative voltage Va, so in FIG. 10, the waveform is such that the down-ramp waveform voltage is held for a certain period after it reaches Vi4L. Is just such a waveform due to the configuration of the circuit shown in FIG.
- the present embodiment is not limited to this waveform or the circuit configuration shown in FIG. It may be configured to switch to voltage Vc immediately after reaching Vi4L.
- scan electrode drive circuit 43 gradually increases, from scan electrode SC1 to scan electrode SCn, voltage Vil that is equal to or lower than the discharge start voltage to voltage Vi2 that exceeds the discharge start voltage. Apply an ascending ramp waveform voltage, and then apply a descending ramp waveform voltage that gradually decreases from voltage Vi3 to initialization voltage Vi4L.
- switching element Q21 is kept on in the subsequent writing period after the end of the initialization period.
- the output signal CEL1 from the comparator CP is maintained at “1”.
- the switching signal CEL2 is set to “1”.
- both inputs of the AND gate AG become “1”, and “1” is output from the AND gate AG.
- the scanning noise generation circuit 54 outputs the voltage Vc in which the voltage Vscn is superimposed on the negative voltage Va.
- the output signal of the AND gate AG becomes “0” by setting the switching signal CEL2 to “0” at the timing of generating the negative scanning noise voltage, and the scanning noise is generated.
- the circuit 54 outputs a negative voltage Va. In this way, a negative scanning noise voltage during the writing period can be generated.
- FIG. 11 is a timing chart for explaining another example of the operation of scan electrode driving circuit 43 in the all-cell initializing period in the first embodiment of the present invention.
- the switching signal CEL2 is set to “1” in the period T1 to the period T5 ′.
- the operation in the period T1 to the period T4 is the same as the operation in the period T1 to the period T4 shown in FIG. 10, so here the period T5 ′ whose operation is different from the period T5 shown in FIG. explain.
- Miller integrating circuit input terminal INb that generates the down-ramp waveform voltage is set to "Hi". Specifically, for example, a voltage of 15 (V) is applied to the input terminal INb. Then, the resistance R11 force also flows a constant current toward the capacitor C12, the drain voltage of the switching element Q14 decreases in a ramp shape, and the output voltage of the scan electrode drive circuit 43 also starts to decrease in a ramp shape.
- the switch circuit OUT;! To OUTn is switched based on the comparison result in the comparator CP, in FIG. 11, the voltage immediately switches to the voltage Vc after the down-ramp waveform voltage reaches Vi4H.
- the force S is a waveform diagram that can be changed. In this embodiment, the voltage is not limited to this waveform. After reaching Vi4H, the voltage is maintained for a certain period. It ’s weird.
- the scan electrode drive circuit 43 has a circuit configuration as shown in Fig. 9, so that the voltage Vset2 can be lowered gently only by setting it to a desired voltage value. Yes
- the minimum voltage of the down-ramp waveform voltage that is, the voltage value of the initialization voltage Vi4 can be easily controlled.
- the control of the initialization voltage Vi4 in the all-cell initialization operation has been described as V.
- the up-ramp waveform voltage should not be generated in response to the selective initialization operation!
- the generation of the down-ramp waveform voltage is the same as described above with the only difference, and the initialization voltage Vi4 can be controlled in the same way.
- Vi4H is set to 5 (V) higher than Vi4L by setting Vset2 to 5 (V).
- Panel characteristics that are not limited to this voltage value It is desirable to set the optimum value according to the specifications of the plasma display device
- the initialization voltage Vi4 is switched between Vi4H and Vi4L, which has a lower voltage value than Vi4H, and the initialization voltage Vi4 is set according to the cumulative energization time of panel 10.
- the configuration is changed. That is, when the cumulative energization time of the panel 10 measured by the cumulative time measuring circuit 48 is less than a predetermined time (in this embodiment, 500 hours or less), the initialization voltage Vi4 is set to Vi4H to generate the down-ramp waveform voltage. After the energization accumulated time exceeds the predetermined time (in this embodiment, more than 500 hours), the initialization voltage Vi4 is set to Vi4L, which is lower than Vi4H, to generate the down-ramp waveform voltage. Suppose that This makes it possible to achieve stable writing without increasing the writing noise voltage Vd when the energization accumulation time increases.
- the down-ramp waveform voltage in which the initialization voltage Vi4 is set to Vi4H in the initialization period of all subfields as shown in FIG. 5A is used.
- a configuration that generates a down ramp waveform voltage with the initialization voltage Vi4 set to Vi4L during the initialization period of all subfields as shown in Fig. 5B is used.
- the present invention is not limited to this configuration, and may have other subfield configurations.
- FIG. 12A is a diagram showing an example of the subfield configuration in Embodiment 2 of the present invention
- FIG. 12B is a diagram showing another example of the subfield configuration in Embodiment 2 of the present invention.
- the second embodiment is different from the first embodiment only in the subfield configuration, and the configuration and operation of each circuit, each drive waveform, and the like are the same as those in the first embodiment.
- a configuration having a subfield for generating a down-ramp waveform voltage in which the initializing voltage Vi4 is set to Vi4L when the energization accumulation time is equal to or less than a predetermined time is also possible. Absent. As shown in Figure 12A, the ramp-down waveform voltage with the initialization voltage Vi4 set to Vi4H is generated in the initialization period of the first SF, the fifth SF to the 10th SF, and the initial period is set in the initialization period of the second SF to the fourth SF. It is also possible to generate a down-ramp waveform voltage with the activation voltage Vi4 set to Vi4L.
- a configuration having a sub-field that generates a down-ramp waveform voltage in which the initialization voltage Vi4 is set to Vi4H after the energized cumulative time exceeds a predetermined time is not a problem.
- the ramp-down waveform voltage with the initialization voltage Vi4 set to Vi4L is generated during the initialization period of the first SF to the ninth SF, and the initialization voltage Vi4 is generated during the initialization period of the tenth SF. It is also possible to generate a down-ramp waveform voltage with Vi4H.
- the ratio of the subfield that generates the down-ramp waveform voltage in which the initialization voltage Vi4 is set to Vi4L in one field period is calculated. What is necessary is just to comprise so that it may increase more calories than when time is below predetermined time, and this can obtain the same result S as above.
- the configuration has been described in which Vset2 is set to 5 (V) and the initialization voltage Vi4 is switched between Vi4L and Vi4H whose voltage value is 5 (V) higher than Vi4L.
- the configuration in which Vi4L is set to a potential equal to the negative voltage Va has been described.
- the potential difference between Vi4L and Vi4H, the potential of ViL, etc. are not limited to these values, but can be set to optimum values according to the panel characteristics and the specifications of the plasma display device.
- the force S is configured to switch the initialization voltage Vi4 at two different voltage values Vi4L and Vi4H, and the initialization voltage Vi4 is not limited to this configuration. It is good also as a structure switched by one or more different voltage values.
- FIG. 13A is a diagram showing an example of a subfield configuration having three initialization voltages Vi4 in Embodiment 2 of the present invention, and FIG. 13B shows three initialization voltages Vi4 in Embodiment 2 of the present invention. It is a figure which shows another example of the subfield structure which has.
- Vi4M is set between Vi4H and Vi4L (in this example, Vi4H is set to a potential 10 (V) higher than Vi4L and Vi4M is set to a potential 5 (V) higher than Vi4L). I ’m sorry.
- the configuration having a subfield for generating a down-ramp waveform voltage in which the initialization voltage Vi4 is set to Vi4M is unavoidable. For example, as shown in Fig.
- the ramp-down waveform voltage with the initialization voltage Vi4 set to Vi4M is generated in the initialization period of the first SF to the fifth SF, and the initialization is performed in the initialization period of the sixth SF to the 10th SF. It is also possible to generate a down-ramp waveform voltage with the voltage Vi4 set to Vi4H. Also, the cumulative energization time is predetermined Even if this time is exceeded, the configuration having a subfield for generating a down-ramp waveform voltage in which the initialization voltage Vi4 is set to Vi4M is unavoidable. For example, as shown in FIG.
- a down-ramp waveform voltage is generated in which the initialization voltage Vi4 is set to Vi4L equal to the scan noise voltage, and the 10th SF In the initializing period, the down voltage waveform is generated by setting the initializing voltage Vi4 to Vi4M.
- the initialization voltage Vi4 is set to the lowest level and the voltage value (here, 1 of the sub-field for generating the down-ramp waveform voltage set to Vi4U). Any configuration that increases the ratio in the field period even when the cumulative energization time is equal to or less than the predetermined time is sufficient, and the same effect as described above can be obtained.
- the configuration in which the initialization voltage Vi4 of the downstream ramp waveform is changed after the energization accumulated time exceeds the predetermined time has been described.
- the drive with the same drive waveform as before is continued and the initialization voltage V i4 is changed at the next operation start timing.
- the accumulated time measuring circuit 48 accumulates energization.
- the timing generation circuit 45 Even if a signal indicating that the time exceeds the predetermined time is output, the timing generation circuit 45 outputs each timing signal for driving the panel 10 as the same timing signal as before. Then, when the power of the plasma display device is turned off and then the plasma display device is turned on and the panel 10 starts to be driven, the timing generation circuit 45 sets the initialization voltage Vi4 to Vi4L and drops it. To generate ramp waveform voltage You may comprise so that an imming signal may be output. According to this configuration, it is possible to prevent a change in brightness that may be caused by changing the initialization waveform during the operation of the plasma display device 1, and to further improve the image display quality.
- the embodiment of the present invention does not limit the Vi4L voltage value, the Vi4H voltage value, the subfield for switching the initialization voltage Vi4, the subfield configuration, etc. to the above-described values. It is desirable to set the optimal value according to the specifications of the plasma display device.
- the xenon partial pressure of the discharge gas is set to 10%.
- the drive voltage corresponding to the panel may be set even for other xenon partial pressures.
- the minimum voltage of the falling ramp waveform voltage generated in the initialization period is changed according to the cumulative time of energizing the panel.
- the cumulative energization time of the panel is increased, it is possible to generate a stable address discharge without increasing the voltage required to generate the address discharge. It is useful as a driving method for plasma display devices and panels.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP07832377.1A EP2096622B1 (en) | 2006-12-13 | 2007-11-22 | Plasma display device and method for driving plasma display panel |
JP2008513042A JP5093105B2 (ja) | 2006-12-13 | 2007-11-22 | プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 |
US12/279,357 US20090303222A1 (en) | 2006-12-13 | 2007-11-22 | Plasma display device and method for driving plasma display panel |
CN200780019105XA CN101454819B (zh) | 2006-12-13 | 2007-11-22 | 等离子显示装置及等离子显示面板的驱动方法 |
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JP2006335400 | 2006-12-13 | ||
JP2006-335400 | 2006-12-13 |
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WO2008072458A1 true WO2008072458A1 (ja) | 2008-06-19 |
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US (1) | US20090303222A1 (ja) |
EP (1) | EP2096622B1 (ja) |
JP (1) | JP5093105B2 (ja) |
KR (1) | KR100961024B1 (ja) |
CN (1) | CN101454819B (ja) |
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US10888090B2 (en) | 2015-06-30 | 2021-01-12 | King Abdullah University Of Science And Technology | Plant growth promoters and methods of using them |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000242224A (ja) | 1999-02-22 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Ac型プラズマディスプレイパネルの駆動方法 |
JP2003015590A (ja) * | 2001-06-28 | 2003-01-17 | Pioneer Electronic Corp | ディスプレイパネルの駆動方法及びディスプレイパネルの駆動装置 |
JP2003140601A (ja) * | 2001-11-06 | 2003-05-16 | Matsushita Electric Ind Co Ltd | プラズマディスプレイの駆動方法 |
JP2005234372A (ja) * | 2004-02-20 | 2005-09-02 | Fujitsu Hitachi Plasma Display Ltd | プラズマディスプレイ及びその駆動方法 |
WO2006132334A1 (ja) * | 2005-06-09 | 2006-12-14 | Matsushita Electric Industrial Co., Ltd. | プラズマディスプレイパネル装置の駆動方法およびプラズマディスプレイパネル装置 |
WO2007091514A1 (ja) * | 2006-02-06 | 2007-08-16 | Matsushita Electric Industrial Co., Ltd. | プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 |
WO2007097328A1 (ja) * | 2006-02-24 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | 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 |
JP2007225986A (ja) * | 2006-02-24 | 2007-09-06 | Matsushita Electric Ind Co Ltd | 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 |
WO2007099903A1 (ja) * | 2006-02-28 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | 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 |
WO2007099904A1 (ja) * | 2006-02-28 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | 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 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0791514A (ja) * | 1990-12-14 | 1995-04-04 | Boris Borisovich Ropateikku | 回転運動から往復運動への、およびその逆の変換機構 |
KR20050018032A (ko) * | 2003-08-12 | 2005-02-23 | 삼성에스디아이 주식회사 | 플라즈마 디스플레이 패널의 구동 방법 및 플라즈마 표시장치 |
KR100610891B1 (ko) * | 2004-08-11 | 2006-08-10 | 엘지전자 주식회사 | 플라즈마 디스플레이 패널의 구동방법 |
US20060033680A1 (en) * | 2004-08-11 | 2006-02-16 | Lg Electronics Inc. | Plasma display apparatus including an energy recovery circuit |
JP4873844B2 (ja) * | 2004-09-24 | 2012-02-08 | パナソニック株式会社 | プラズマディスプレイ装置 |
US20070091514A1 (en) * | 2005-10-21 | 2007-04-26 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetoresistive (MR) elements having improved hard bias seed layers |
JP5136414B2 (ja) * | 2006-12-28 | 2013-02-06 | パナソニック株式会社 | プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 |
-
2007
- 2007-11-22 US US12/279,357 patent/US20090303222A1/en not_active Abandoned
- 2007-11-22 WO PCT/JP2007/072648 patent/WO2008072458A1/ja active Application Filing
- 2007-11-22 CN CN200780019105XA patent/CN101454819B/zh not_active Expired - Fee Related
- 2007-11-22 EP EP07832377.1A patent/EP2096622B1/en not_active Not-in-force
- 2007-11-22 JP JP2008513042A patent/JP5093105B2/ja not_active Expired - Fee Related
-
2008
- 2008-10-28 KR KR20087026353A patent/KR100961024B1/ko not_active IP Right Cessation
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000242224A (ja) | 1999-02-22 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Ac型プラズマディスプレイパネルの駆動方法 |
JP2003015590A (ja) * | 2001-06-28 | 2003-01-17 | Pioneer Electronic Corp | ディスプレイパネルの駆動方法及びディスプレイパネルの駆動装置 |
JP2003140601A (ja) * | 2001-11-06 | 2003-05-16 | Matsushita Electric Ind Co Ltd | プラズマディスプレイの駆動方法 |
JP2005234372A (ja) * | 2004-02-20 | 2005-09-02 | Fujitsu Hitachi Plasma Display Ltd | プラズマディスプレイ及びその駆動方法 |
WO2006132334A1 (ja) * | 2005-06-09 | 2006-12-14 | Matsushita Electric Industrial Co., Ltd. | プラズマディスプレイパネル装置の駆動方法およびプラズマディスプレイパネル装置 |
WO2007091514A1 (ja) * | 2006-02-06 | 2007-08-16 | Matsushita Electric Industrial Co., Ltd. | プラズマディスプレイ装置およびプラズマディスプレイパネルの駆動方法 |
WO2007097328A1 (ja) * | 2006-02-24 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | 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 |
JP2007225986A (ja) * | 2006-02-24 | 2007-09-06 | Matsushita Electric Ind Co Ltd | 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 |
WO2007099903A1 (ja) * | 2006-02-28 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | 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 |
WO2007099904A1 (ja) * | 2006-02-28 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | 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 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2096622A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2096622A1 (en) | 2009-09-02 |
JPWO2008072458A1 (ja) | 2010-04-22 |
EP2096622A4 (en) | 2010-07-14 |
CN101454819B (zh) | 2011-04-13 |
KR100961024B1 (ko) | 2010-06-01 |
EP2096622B1 (en) | 2013-06-05 |
JP5093105B2 (ja) | 2012-12-05 |
US20090303222A1 (en) | 2009-12-10 |
KR20090008292A (ko) | 2009-01-21 |
CN101454819A (zh) | 2009-06-10 |
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