WO2004055770A1 - 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パネルの駆動方法 Download PDFInfo
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- WO2004055770A1 WO2004055770A1 PCT/JP2003/015856 JP0315856W WO2004055770A1 WO 2004055770 A1 WO2004055770 A1 WO 2004055770A1 JP 0315856 W JP0315856 W JP 0315856W WO 2004055770 A1 WO2004055770 A1 WO 2004055770A1
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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
- G09G3/294—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 lighting or sustain discharge
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0228—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
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
-
- 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
Definitions
- the present invention relates to a driving method for a plasma display panel used as a large-screen, thin, and lightweight display device.
- a large number of discharge cells are formed between a front plate and a rear plate which are arranged opposite to each other.
- a front plate a plurality of pairs of display electrodes composed of a pair of scan electrodes and sustain electrodes are formed on a front glass substrate in parallel with each other, and a dielectric layer and a protective layer are formed so as to cover the display electrodes.
- the back plate is composed of a plurality of parallel data electrodes on a back glass substrate, a dielectric layer covering them, and a plurality of partitions formed thereon in parallel with the data electrodes.
- a phosphor layer is formed on the surface of the substrate and on the side surfaces of the partition walls.
- the front plate and the back plate are opposed to each other so that the display electrode and the data electrode are three-dimensionally intersecting, and are sealed.
- a discharge gas is sealed in the internal discharge space.
- a discharge cell is formed in a portion where the display electrode and the data electrode face each other.
- ultraviolet rays are generated by gas discharge in each discharge cell, and the phosphors of each of RGB colors are excited and emitted by the ultraviolet rays to perform color display.
- a subfield method that is, a subfield for emitting light after dividing one field period into a plurality of subfields
- a method of performing gradation display by a combination of fields is generally used.
- a novel driving method in which light emission not related to gradation expression is reduced as much as possible to improve the contrast ratio is disclosed in Japanese Patent Application Laid-Open No. 2000-224224. I have.
- FIG. 8 is an example of a driving waveform diagram of a conventional plasma display panel with an improved contrast ratio.
- One field period is composed of N subfields having an initialization period, a write period, and a sustain period, and is abbreviated as a first SF, a second SF, *..., And a NSF, respectively.
- the initialization operation is performed only in the discharge cells lit during the sustain period of the previous sub-field. I have.
- a weak discharge is generated by applying a gradually rising ramp voltage to the scanning electrode, and wall charges necessary for the writing operation are formed on each electrode. At this time, excessive wall charges are formed in anticipation of optimizing the wall charges later. Then, in the latter half of the initialization period, a weak discharge is generated again by applying a gradually falling ramp voltage to the scan electrodes, weakening the wall charges excessively stored on each electrode, and causing each discharge cell to discharge. To an appropriate wall charge.
- an address discharge occurs in a discharge cell to be displayed.
- a sustain pulse is applied to the scan electrode and the sustain electrode, a sustain discharge is caused in the discharge cell in which the address discharge has occurred, and the phosphor layer of the corresponding discharge cell emits light, thereby causing an image to be displayed. Display.
- the second SF initialization period is the same as the second half of the first SF initialization period.
- a drive voltage similar to that described above, that is, a ramp voltage that gradually decreases is applied to the scan electrodes. This is because it is not necessary to provide the first half of the initialization period independently in order to simultaneously perform the formation of wall charges necessary for the address operation and the sustain discharge. Therefore, the discharge cell that sustained discharge in the first SF generates a weak discharge, weakens the wall charge excessively stored on each electrode, and adjusts it to an appropriate wall charge for each discharge cell. I do. In addition, the discharge cells that have not undergone the sustain discharge retain the wall charges at the end of the initialization period of the first SF, and do not discharge.
- the initializing operation of the first SF is an all-cell initializing operation of discharging all the discharge cells
- the initializing operation of the second SF and thereafter is the selective initializing operation of initializing only the discharge cells that have undergone the sustain discharge. Operation. Therefore, light emission that is not related to display is only weak discharge for initializing the first SF, and an image with high contrast can be displayed.
- the present invention has been made to solve the above-described problems, and provides a driving method of a plasma display panel capable of displaying an image with a high contrast without increasing the voltage applied to the de-electrode. The purpose is to do. Disclosure of the invention
- a method for driving a plasma display panel is characterized in that one field period includes a plurality of subfields having an initialization period, a writing period, and a sustaining period, and at least one subfield is provided.
- the sustain period of the subfield is a first sustain period in which the transition period of the sustain pulse applied to the scan electrode and the transition period of the sustain pulse applied to the sustain electrode do not overlap in time, and a sustain period of the sustain pulse applied to the scan electrode.
- FIG. 1 is a perspective view showing a main part of a plasma display panel used in an embodiment of the present invention.
- FIG. 2 is an electrode arrangement diagram of the plasma display panel.
- FIG. 3 is a configuration diagram of a plasma display device using the driving method according to the embodiment of the present invention.
- FIG. 4 is an example of a drive circuit diagram for generating a sustain pulse in the plasma display device.
- FIG. 5 is a driving waveform diagram applied to each electrode of the plasma display panel according to the embodiment of the present invention.
- FIG. 6 is a drive waveform diagram, a light emission waveform diagram, and a control signal waveform diagram of a switching element during a maintenance period of the plasma display panel according to the embodiment of the present invention.
- FIG. 7 is a configuration diagram of a plasma display device that changes the time length of the second sustain period according to the lighting rate of the discharge cell in the embodiment of the present invention.
- FIG. 8 is a driving waveform diagram of a conventional plasma display panel. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a perspective view showing a main part of a plasma display panel used in one embodiment of the present invention.
- the panel 1 is configured such that a front substrate 2 and a rear substrate 3 made of glass are opposed to each other, and a discharge space is formed therebetween.
- a plurality of scan electrodes 4 and sustain electrodes 5, which constitute display electrodes, are formed in pairs in parallel with each other.
- a dielectric layer 6 is formed so as to cover scan electrode 4 and sustain electrode 5, and a protective layer 7 is formed on dielectric layer 6.
- a plurality of data electrodes 9 covered with an insulator layer 8 are provided on the rear substrate 3, and a partition 10 is formed on the insulator layer 8 between the data electrodes 9 in parallel with the data electrodes 9.
- the phosphor 11 is provided on the surface of the insulator layer 8 and the side surface of the partition wall 10.
- the front substrate 2 and the rear substrate 3 are arranged facing each other in the direction in which the scanning electrode 4, the sustain electrode 5, and the data electrode 9 intersect, and a discharge space formed between them is used as a discharge gas.
- a mixed gas of neon and xenon is sealed.
- FIG. 2 is an electrode array diagram of the panel.
- n scan electrodes SCN 1 to SCN n scan electrode 4 in FIG. 1
- n sustain electrodes SUS 1 to SUS n scan electrode 5 in FIG. 1
- Data electrodes Dl to Dm data electrode 9 in Fig. 1 of the book are arranged.
- M X n cells are formed in the discharge space.
- FIG. 3 is a configuration diagram of a plasma display device using the driving method according to the embodiment of the present invention.
- This plasma display device has a panel 1, Data driver circuit 1, 2, Scan driver circuit 13, Sustain driver circuit 14, Timing generator circuit 15, Power supply circuit 1, 6, 17, A / D converter (Analog / Digital converter) 1 8 And a scanning number conversion unit 19 and a subfield conversion unit 20.
- a video signal VD is input to an AZD converter 18.
- the horizontal synchronizing signal H and the vertical synchronizing signal V are supplied to a timing generator 15, an A / D converter 18, a scanning number converter 19, and a subfield converter 20.
- the AZD converter 18 converts the video signal VD into digital signal image data, and supplies the image data to the scan number conversion unit 19.
- the scanning number converter 19 converts the image data into image data corresponding to the number of pixels of the panel 1 and supplies the image data to the subfield converter 20.
- the subfield converter 20 divides the image data of each pixel into a plurality of bits corresponding to a plurality of subfields, and outputs the image data of each subfield to the data driver circuit 12.
- the data driver circuit 12 converts the image data for each subfield into a signal corresponding to each of the data electrodes D1 to Dm, and supplies the voltage of the power supply circuit 16 to each data electrode based on the signal.
- the timing generation circuit 15 generates timing signals SC and SU with reference to the horizontal synchronization signal H and the vertical synchronization signal V, and supplies them to the scan driver circuit 13 and the sustain driver circuit 14, respectively.
- the scan driver circuit 13 and the sustain driver circuit 14 are connected to a power supply circuit 17.
- Scan driver circuit 13 supplies a drive waveform to scan electrodes S CN1 to S CNn based on timing signal SC, and sustain driver circuit 14 supplies sustain electrodes S US1 to SU n based on timing signal SU. Supply drive waveform.
- FIG. 4 is an example of a drive circuit diagram for generating a sustain pulse.
- the sustain pulse generating circuit 33 on the scanning electrode side will be described.
- the switching elements 25 and 27 are switching elements for applying a voltage directly from the power supply Vm or GND to the scan electrodes S CN1 to SCNn.
- the capacitor C, the coil L, the switching elements 26 and 28, and the diodes 21 and 22 constitute a power recovery circuit, which resonates the capacitance of the scanning electrode and the coil L, thereby consuming power.
- This is a circuit for applying a voltage to the scan electrodes S CN1 to S CNn without any.
- the diodes 21 and 22 prevent the backflow of the current, and the switching elements 25 to 28 are turned on when the input signal is at a high level.
- the sustain pulse generation circuit 33 on the scan electrode side is connected to the scan electrodes S CN1 to S CNn of the panel 1 through the scan pulse generation circuit 34.
- FIG. 5 is a driving waveform diagram applied to each electrode of the plasma display panel according to the embodiment of the present invention, and shows driving waveforms from the first SF to the second SF.
- the data electrodes Dl to Dm and the sustain electrodes SUSl to SUSn are maintained at 0 (V), and the scan electrodes SCN1 to SCNn are set to a voltage lower than the discharge starting voltage. From the voltage Vp (V) to the voltage Vr (V) that exceeds the discharge starting voltage. Then, the first weak initializing discharge occurs in all the discharge cells, a negative wall voltage is stored on the scan electrodes S CN1 to S CNn, and the sustain electrodes SUS 1 to SUS n and the data electrode D Positive wall voltage is stored on 1 to Dm.
- the wall voltage on the electrode means a voltage generated by wall charges accumulated on the dielectric layer or the phosphor layer covering the electrode.
- the sustain electrodes SUS1 to SUSn are maintained at the positive voltage Vh (V), and the scan electrodes SCN1 to SCNn ramp down gradually from the voltage Vg (V) to the voltage Va (V) on the scan electrodes SCN1 to SCNn. Apply voltage.
- the second weak initializing discharge occurs in all discharge cells, and the wall voltage on scan electrodes S CN1 to SCN n and the wall voltage on sustain electrodes SUS 1 to SUS n are weakened, and data electrode D
- the wall voltage above 1 to Dm is also adjusted to a value suitable for the write operation.
- the all-cell initializing operation for performing the initializing discharge in all the discharge cells is performed.
- the scan electrodes SCN1 to SCNn are temporarily held at Vs (V).
- Vw positive address pulse voltage
- V b the voltage at the intersection between the data electrode Dk and the scan electrode SCN1 is determined by the externally applied voltage (Vw-Vb), which is the wall voltage on the data electrode Dk and the wall voltage on the scan electrode SCN1. The magnitude is added and exceeds the firing voltage.
- the above address operation is sequentially performed up to the discharge cells in the nth row, and the address period is completed.
- sustain electrodes SUS1 to SUSn are returned to 0 (V), and positive sustain pulse voltage Vm (V) is applied to scan electrodes SCN1 to SCNn.
- Vm positive sustain pulse voltage
- the voltage between the scan electrode SCNi and the sustain electrode SUSi is changed to the sustain pulse voltage Vm (V), the scan electrode SCNi and the sustain electrode SUSi.
- the magnitude of the upper wall voltage is added and exceeds the firing voltage.
- a sustain discharge occurs between the scan electrode SCNi and the sustain electrode SUSi, and a negative wall voltage is accumulated on the scan electrode SCNi, and a positive wall voltage is accumulated on the sustain electrode SUSi.
- a positive wall voltage is also accumulated on the data electrode Dk.
- the scan electrodes SUS1 to SUSn are returned to 0 (V), and a positive sustain pulse voltage Vm (V) is applied to the sustain electrodes SUSl to SUSn.
- Vm positive sustain pulse voltage
- the voltage between the sustain electrode SUS i and the scan electrode SCN i exceeds the discharge starting voltage.
- a sustain discharge occurs, similarly after t the positive wall voltage on the scan electrodes S CN i negative wall voltage is accumulated on sustain electrode SUS i are accumulated, the scanning electrodes S CN 1 to S CNn and sustain electrode SUS
- the sustain period includes a first sustain period and a second sustain period. This point is the focus of the present invention and will be described later in detail.
- the sustain electrodes SUS1 to SUSn are held at Vh (V)
- the data electrodes Dl to Dm are held at 0 (V)
- the scan electrodes SCN1 to SCN are held.
- a ramp voltage that gradually decreases from Vm (V) to Va (V) is applied to n.
- the wall voltage on scan electrode SCNi and sustain electrode SUSi was weakened, and the The wall voltage on the electrode D k is also adjusted to a value suitable for a write operation.
- the discharge cells that did not perform the write discharge and the sustain discharge in the first SF are not discharged, and the state of the wall charge at the end of the initialization period of the first SF is maintained.
- the setup period of the second SF the selective initialization operation of performing the setup discharge in the discharge cells that have undergone the sustain discharge in the first SF is performed. Since the third and subsequent SFs are the same as the second SF, the description is omitted.
- the voltage change rate of the lamp voltage during the initialization period is desirably 10 V / s or less, and is set to 2 to 3 VZzs in the present embodiment.
- FIG. 6 is an enlarged view of the driving waveform applied to the scan electrode SCNi and the sustain electrode SUSi during the sustain period, that is, the sustain pulse and the accompanying light emission waveform.
- signals for controlling the switching elements 25 to 32 shown in FIG. 4 are shown as signals S25 to S32, respectively.
- the sustain pulse applied to the scan electrode SCN i or the sustain electrode SUS i is a transition period (rising period) from 0 (V) to the sustain pulse voltage Vm (V), and the sustain pulse voltage Vm (V ), A transition period (falling period) in which the sustain pulse voltage Vm (V) changes to 0 (V), and a low period fixed to 0 (V).
- the sustain pulse applied to the scan electrode SCNi as an example, when the signal S26 is set to a high level during the rising period, the switching element 26 shown in Fig. 4 is turned on, and the power recovery capacitor is used. The electric charge stored in C is supplied to scan electrode SCNi via coil L, and the voltage of scan electrode SCNi increases.
- the switching element 25 is turned on by setting the signal S25 to a high level, the voltage Vm (V) is supplied from the power supply Vm (V) to the scan electrode SCNi, and the scan electrode SCNi Is fixed at Vm (V).
- the signal S25 and the signal S26 are set to low level, and then the signal S28 is set to high level to turn on the switching element 28 and stored in the scan electrode SCNi.
- the charge stored in the capacitor C for power recovery is recovered via the coil L, and the voltage of the scan electrode SCNi drops.
- the signal S27 is set to the high level to switch the switching element 2 7 turns on, and the scanning electrode SCNi is grounded and fixed at 0 (V). The same applies to the sustain electrode SUS i.
- the sustain period is composed of a first sustain period and a second sustain period as shown in FIG.
- FIG. 6 shows the details of the drive waveforms from the first sustain period to the second sustain period.
- the transition period of the sustain pulse applied to scan electrode SCN i is configured so that the transition period of the sustain pulse applied to sustain electrode SUS i does not overlap in time, and in the second sustain period, scan electrode SCN i
- the transition period of the sustain pulse applied to i and the transition period of the sustain pulse applied to the sustain electrode SUSi are configured to overlap at least partially in time.
- the first sustain period after one display electrode (for example, scan electrode SCN i) is fixed to 0 (V), a voltage is applied to the other display electrode (for example, sustain electrode SUS i). Has begun. However, in the second sustain period, the sustain pulse is applied so that the fall period of one display electrode (for example, scan electrode SCN i) and the rise period of the other display electrode (for example, sustain electrode SUS i) overlap. Is being applied.
- the transition period of the sustain pulse applied to the scan electrode SCN i and the transition period of the sustain pulse applied to the sustain electrode SUS i do not overlap in time.
- the second sustaining period includes a sustaining period, a transitional period of the sustaining pulse applied to the scan electrode SCNi, and a transitional period of the sustaining pulse applied to the sustaining electrode SUSi.
- the light emission waveforms and the timings of the first sustain period and the second sustain period are significantly different ; in the first sustain period, the sustain discharge occurs.
- the self-erasing discharge d2 occurs Tw (/ S) after the other display electrode (for example, the scan electrode SCNi) is fixed to 0 (V). Then, when a voltage is applied to the other display electrode (for example, sustain electrode SUSi), main discharge dl occurs.
- the main discharge d3 occurs without substantially causing the self-erasing discharge.
- the main discharge d3 at this time is larger than the main discharge d1 in the first sustain period.
- the drive waveform of one display electrode falls from Vm (V) to 0 (V). Accordingly, a self-erasing discharge d 2 is generated, which reduces wall charges accumulated on each electrode. Then, when a voltage Vm (V) is applied to the other display electrode (for example, the sustaining electrode S USi), a main discharge d 1 is generated. At this time, the main discharge d 1 itself is generated due to insufficient wall voltage. It can be thought that it will be weakened.
- the drive waveform of one display electrode for example, scan electrode SCNi
- the drive waveform of the other display electrode for example, sustain electrode SUSi
- the main discharge d3 occurs at the same time as or before the self-erasing discharge occurs. Therefore, the main discharge d3 is generated in a state where the wall voltage is sufficiently accumulated, so that the discharge is stronger than the main discharge d1.
- a negative wall voltage is applied to the scan electrode SCNi and a negative wall voltage is applied to the discharge electrode having undergone the sustaining discharge.
- the positive wall voltage is sufficiently stored on the data electrode Dk. Therefore, in the subsequent subfield selection initialization operation, when a ramp voltage that gradually decreases from Vm (V) to V a (V) is applied to scan electrode S CN i, the voltage between sustain electrode SUS i and scan electrode SCN i is reduced. Between the data electrode D k and the scanning electrode S CN i, the wall voltage on the sustain electrode SUS i and the wall voltage on the data electrode D k, and is suitable for the write operation. Value can be adjusted. Therefore, the write voltage required for the next write operation can be reduced, and a stable image display can be performed.
- the sustain period ends in the first sustain period, so that the sustain discharge becomes a weak main discharge d 1, the negative wall voltage on the scan electrode SCN i, and the sustain electrode on the sustain electrode SUS i. And the positive wall voltage on the data electrode D k is insufficient. Therefore, during the initialization period of the subsequent subfield, wall charge formation suitable for the write operation is incomplete, such that no initialization discharge occurs, or even if it occurs, sufficient charge adjustment is not performed. Then, in order to reliably generate the address discharge, it is necessary to compensate for the shortage of the wall voltage. Therefore, it can be considered that the voltage applied to the data electrode needs to be increased.
- the subsequent initialization operation is stabilized, and the write operation is performed. Suitable wall charges are formed.
- the second sustain period is lengthened and the number of sustain pulses in which the transition periods of the drive waveform applied to the scan electrode and the sustain electrode overlap in time is increased, the subsequent selective initialization operation will be more stable. This can be done, but the effect does not change much when the number of sustain pulses that overlap in time increases to some extent. However, the number of sustain pulses overlapping in time required for stabilizing the initialization operation is also affected by the panel lighting rate.
- the transition period between the scan electrode SCN i and the sustain electrode SUS i overlaps with each other in time, so that the electrode
- the peak of the current flowing during charging / discharging is larger than the driving waveform in the first sustain period, and the power consumed by the panel resistance and the circuit resistance increases, so the reactive power tends to increase.
- the length of the second maintenance period is kept to a minimum.
- the length of the second sustaining period is set to a length including about 5 sustaining pulses so that the initializing operation can be stably performed. It can be carried out. Therefore, the increase in the reactive power can be suppressed within a small range.
- the time length of the second sustain period may be changed according to the lighting rate of the discharge cell.
- FIG. 7 shows a configuration of a plasma display device in which the time length of the second sustain period is changed according to the lighting rate of the discharge cells.
- a rate detecting means 40 is provided.
- the lighting rate detection means 40 detects the lighting rate indicating the ratio of the number of discharge cells lit in each subfield to the total number of discharge cells, based on the data of the subfield converter 20.
- the lighting rate of each subfield detected by the lighting rate detecting means 40 is sent to the timing generation circuit 15, and the timing generation circuit 15 determines the length of the second sustain period based on the lighting rate.
- the second sustain period is shortened, and if the lighting rate of the discharge cells is large, the second sustain period is lengthened.
- the initialization operation can be performed stably while minimizing the increase in the reactive power.
- FIG. 6 shows the rising period of the sustain pulse applied to one electrode (for example, scan electrode SCN i) and the sustain pulse applied to the other electrode (sustain electrode SUS i) in the second sustain period.
- the figure shows that the falling period is almost the same as the falling period, it is not always necessary.
- the time during which the transition period of the sustain pulse is overlapped in the second sustain period is set so that the self-erasing discharge does not substantially occur. Just set it.
- FIG. 6 shows a driving waveform in which the entire transition period of the sustain pulse applied to one display electrode is located within the low period of the sustain pulse applied to the other display electrode in the first sustain period.
- a driving waveform may be such that the entire transition period of the sustain pulse applied to one display electrode is located within the high period of the sustain pulse applied to the other display electrode.
- the ramp voltage waveform is used as a drive waveform for generating the initialization discharge during the initialization period, but instead of this ramp voltage waveform, the voltage change rate is 10 V / s or less, which is gradual. Alternatively, a gradual distribution voltage waveform that changes to However, if the voltage change rate becomes too small, the initialization period becomes longer and gradation display becomes difficult. Therefore, the lower limit of the voltage change rate is set within a range where a desired gradation display is possible. Further, in the embodiment, since the initializing discharge of all cells is performed during the initializing period of the first SF irrespective of the wall charge state of each discharge cell, the subfield (1 field) arranged immediately before the first SF is set. The second sustain period may not be provided in the sustain period of the last subfield of the period). Industrial applicability
- the initializing discharge can be generated stably, and the contrast can be increased without increasing the voltage applied to the data electrode. Images can be displayed.
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- Computer Hardware Design (AREA)
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP03778801A EP1571641A4 (en) | 2002-12-13 | 2003-12-11 | PLASMAANZEIGETAFELANSTEUERVERFAHREN |
KR1020047018640A KR100636943B1 (ko) | 2002-12-13 | 2003-12-11 | 플라즈마 디스플레이 패널의 구동 방법 |
US10/509,033 US7423616B2 (en) | 2002-12-13 | 2003-12-11 | Plasma display panel drive method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-362050 | 2002-12-13 | ||
JP2002362050 | 2002-12-13 |
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WO2004055770A1 true WO2004055770A1 (ja) | 2004-07-01 |
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PCT/JP2003/015856 WO2004055770A1 (ja) | 2002-12-13 | 2003-12-11 | プラズマディスプレイパネルの駆動方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7423616B2 (ja) |
EP (1) | EP1571641A4 (ja) |
KR (1) | KR100636943B1 (ja) |
CN (1) | CN100470614C (ja) |
WO (1) | WO2004055770A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008275748A (ja) * | 2007-04-26 | 2008-11-13 | Matsushita Electric Ind 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 |
Families Citing this family (15)
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KR100573167B1 (ko) * | 2004-11-12 | 2006-04-24 | 삼성에스디아이 주식회사 | 플라즈마 디스플레이 패널의 구동방법 |
JP4738122B2 (ja) * | 2005-09-30 | 2011-08-03 | 日立プラズマディスプレイ株式会社 | プラズマディスプレイ装置の駆動方法 |
KR100747183B1 (ko) | 2005-12-12 | 2007-08-07 | 엘지전자 주식회사 | 플라즈마 디스플레이 장치 |
KR100794163B1 (ko) * | 2006-01-12 | 2008-01-11 | 엘지전자 주식회사 | 플라즈마 디스플레이 장치 |
KR100793031B1 (ko) * | 2006-05-04 | 2008-01-10 | 엘지전자 주식회사 | 플라즈마 디스플레이 장치 |
KR100820637B1 (ko) * | 2006-06-05 | 2008-04-10 | 엘지전자 주식회사 | 플라즈마 디스플레이 장치 |
US20090201319A1 (en) * | 2006-09-20 | 2009-08-13 | Hiroyasu Makino | Plasma display panel drive method and plasma display panel device |
KR101096995B1 (ko) * | 2007-09-03 | 2011-12-20 | 파나소닉 주식회사 | 플라즈마 디스플레이 패널 장치 및 플라즈마 디스플레이 패널의 구동 방법 |
GB0718956D0 (en) * | 2007-09-28 | 2007-11-07 | Qinetiq Ltd | Wireless communication system |
KR100893687B1 (ko) * | 2007-10-01 | 2009-04-17 | 삼성에스디아이 주식회사 | 플라즈마 표시 장치 및 그 구동 방법 |
KR20090045634A (ko) * | 2007-11-02 | 2009-05-08 | 삼성에스디아이 주식회사 | 플라즈마 표시 장치 및 그 구동 방법 |
KR20090049822A (ko) * | 2007-11-14 | 2009-05-19 | 삼성에스디아이 주식회사 | 플라즈마 표시 장치 및 그 구동 방법 |
JP4589973B2 (ja) * | 2008-02-08 | 2010-12-01 | 株式会社日立製作所 | プラズマディスプレイパネルの駆動方法及びプラズマディスプレイ装置 |
CN101719348B (zh) * | 2008-12-24 | 2012-05-09 | 四川虹欧显示器件有限公司 | 用于等离子显示器的驱动方法 |
US20120050253A1 (en) * | 2009-05-14 | 2012-03-01 | Panasonic Corporation | Method for driving plasma display panel and plasma display device |
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-
2003
- 2003-12-11 US US10/509,033 patent/US7423616B2/en not_active Expired - Fee Related
- 2003-12-11 WO PCT/JP2003/015856 patent/WO2004055770A1/ja active Application Filing
- 2003-12-11 KR KR1020047018640A patent/KR100636943B1/ko not_active IP Right Cessation
- 2003-12-11 CN CNB2003801004851A patent/CN100470614C/zh not_active Expired - Fee Related
- 2003-12-11 EP EP03778801A patent/EP1571641A4/en not_active Withdrawn
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Cited By (4)
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---|---|---|---|---|
JP2008275748A (ja) * | 2007-04-26 | 2008-11-13 | Matsushita Electric Ind 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 |
WO2008136180A1 (ja) * | 2007-04-26 | 2008-11-13 | Panasonic Corporation | 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 |
KR101011570B1 (ko) | 2007-04-26 | 2011-01-27 | 파나소닉 주식회사 | 플라즈마 디스플레이 장치 및 플라즈마 디스플레이 패널의 구동 방법 |
US8405576B2 (en) | 2007-04-26 | 2013-03-26 | Panasonic Corporation | Plasma display device and plasma display panel driving method |
Also Published As
Publication number | Publication date |
---|---|
CN100470614C (zh) | 2009-03-18 |
US7423616B2 (en) | 2008-09-09 |
EP1571641A4 (en) | 2009-04-29 |
KR100636943B1 (ko) | 2006-10-19 |
CN1692394A (zh) | 2005-11-02 |
EP1571641A1 (en) | 2005-09-07 |
US20050168404A1 (en) | 2005-08-04 |
KR20040111644A (ko) | 2004-12-31 |
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