WO2011111390A1 - プラズマディスプレイ装置、プラズマディスプレイシステム、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、プラズマディスプレイシステム、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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- WO2011111390A1 WO2011111390A1 PCT/JP2011/001397 JP2011001397W WO2011111390A1 WO 2011111390 A1 WO2011111390 A1 WO 2011111390A1 JP 2011001397 W JP2011001397 W JP 2011001397W WO 2011111390 A1 WO2011111390 A1 WO 2011111390A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
- G09G3/2037—Display of intermediate tones by time modulation using two or more time intervals using sub-frames with specific control of sub-frames corresponding to the least significant bits
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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
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
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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
- G09G3/292—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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
- G09G3/293—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
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- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/42—Fluorescent layers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
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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
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
- G09G2340/0435—Change or adaptation of the frame rate of the video stream
Definitions
- One of the important factors in improving the image display quality on the panel is the improvement in contrast.
- a driving method is disclosed in which light emission not related to gradation display is reduced as much as possible to improve the contrast ratio.
- black luminance The luminance of the black display area where no sustain discharge occurs (hereinafter abbreviated as “black luminance”) varies depending on light emission not related to image display, for example, light emission caused by initialization discharge.
- light emission in the black display region is only weak light emission when the initialization operation is performed on all the discharge cells. Thereby, it is possible to reduce the black luminance and display an image with high contrast (see, for example, Patent Document 1).
- One 3D image is composed of one right-eye image and one left-eye image.
- this plasma display device when a 3D image is displayed on the panel, the right-eye image and the left-eye image are alternately displayed on the panel.
- the auxiliary sub that performs the same addressing operation as the top subfield is performed. And wherein the driving panel is provided in one field field.
- This protective layer 26 has been used as a panel material in order to lower the discharge starting voltage in the discharge cell.
- the secondary layer 26 has a large secondary electron emission coefficient and is durable. It is made of a material mainly composed of magnesium oxide (MgO).
- the time constant of the phosphor layer 35B is about 0.1 msec, and the time constants of the phosphor layer 35G and the phosphor layer 35R are about 3 msec.
- This time constant is the time required for the afterglow to decay to about 10% of the emission luminance (peak luminance) at the time of occurrence of discharge after the end of discharge.
- the front substrate 21 and the rear substrate 31 are arranged to face each other so that the display electrode pair 24 and the data electrode 32 intersect with each other with a minute discharge space interposed therebetween. And the outer peripheral part is sealed with sealing materials, such as glass frit. Then, for example, a mixed gas of neon and xenon is sealed in the discharge space inside as a discharge gas.
- FIG. 2 is an electrode array diagram of panel 10 used in the plasma display device according to one embodiment of the present invention.
- the panel 10 includes n scan electrodes SC1 to SCn (scan electrode 22 in FIG. 1) extended in the horizontal direction (row direction) and n sustain electrodes SU1 to SUn (sustain electrodes in FIG. 1). 23) are arranged, and m data electrodes D1 to Dm (data electrodes 32 in FIG. 1) extending in the vertical direction (column direction) are arranged.
- the control signal generation circuit 45 determines whether the input signal to the plasma display device 40 is a 3D image signal or a 2D image signal from the frequency of the horizontal synchronization signal and the vertical synchronization signal of the input signals. For example, if the horizontal synchronization signal is 33.75 kHz and the vertical synchronization signal is 60 Hz, the input signal is determined as a 2D image signal. If the horizontal synchronization signal is 67.5 kHz and the vertical synchronization signal is 120 Hz, the input signal is a 3D image signal. Judge. Various control signals for controlling the operation of each circuit block are generated based on the horizontal synchronization signal and the vertical synchronization signal. The generated control signal is supplied to each circuit block (data electrode drive circuit 42, scan electrode drive circuit 43, sustain electrode drive circuit 44, image signal processing circuit 41, etc.).
- the shutter opening / closing timing signal is turned on when the right eye field based on the right eye image signal of the 3D image is displayed on the panel 10 and turned off when the left eye field is displayed based on the left eye image signal. ON when displaying the left-eye field based on the timing signal for right eye shutter opening / closing and the left-eye image signal of the 3D image, and OFF when displaying the right-eye field based on the right-eye image signal. And a left-eye timing signal (left-eye shutter opening / closing timing signal).
- the timing signal output unit 46 includes a light emitting element such as an LED (Light Emitting Diode).
- the shutter opening / closing timing signal is converted into an infrared signal, for example, and supplied to the shutter glasses 50.
- the shutter glasses 50 include a signal receiving unit (not shown) that receives a signal (for example, an infrared signal) output from the timing signal output unit 46, and a right-eye shutter 52R and a left-eye shutter 52L.
- the right-eye shutter 52R and the left-eye shutter 52L can be opened and closed independently.
- the shutter glasses 50 open and close the right-eye shutter 52R and the left-eye shutter 52L based on the shutter opening / closing timing signal supplied from the timing signal output unit 46.
- the right-eye shutter 52R and the left-eye shutter 52L can be configured using liquid crystal, for example.
- the material constituting the shutter is not limited to liquid crystal, and any material can be used as long as it can switch between blocking and transmitting visible light at high speed. .
- the plasma display device 40 in the present embodiment drives the panel 10 by the subfield method.
- the subfield method one field is divided into a plurality of subfields on the time axis, and a luminance weight is set for each subfield. Therefore, each field has a plurality of subfields.
- Each subfield has an initialization period, an address period, and a sustain period.
- an initializing operation is performed in which initializing discharge is generated in the discharge cells and wall charges necessary for the address discharge in the subsequent address period are formed on each electrode.
- a scan pulse is applied to the scan electrode 22 and an address pulse is selectively applied to the data electrode 32, an address discharge is selectively generated in the discharge cells to emit light, and a sustain discharge is generated in the subsequent sustain period.
- An address operation for forming wall charges to be generated in the discharge cells is performed.
- the number of subfields constituting one field and the luminance weight of each subfield are not limited to the above-described numerical values.
- the structure which switches a subfield structure based on an image signal etc. may be sufficient.
- one field is divided into eight subfields (subfield SF1, subfield SF2,..., Subfield SF8).
- luminance weights of (1, 2, 4, 8, 16, 32, 64, 128) are set in each of the subfields SF1 to SF8 will be described.
- the number of subfields constituting one field and the luminance weight of each subfield are not limited to the above values.
- the voltage 0 (V) is applied to the data electrode D1 to the data electrode Dm and the sustain electrode SU1 to the sustain electrode SUn.
- Scan electrode SC1 to scan electrode SCn are applied with voltage Vi1 after applying voltage 0 (V), and gradually increase from voltage Vi1 to voltage Vi2 (eg, with a gradient of 1.3 V / ⁇ sec).
- a ramp waveform voltage (hereinafter referred to as “lamp voltage L1”) is applied.
- Voltage Vi1 is set to a voltage lower than the discharge start voltage with respect to sustain electrode SU1 through sustain electrode SUn, and voltage Vi2 is set to a voltage exceeding the discharge start voltage.
- the user viewing the 3D image displayed on the panel 10 through the shutter glasses 50 recognizes the images (right-eye image and left-eye image) displayed in two fields as one 3D image. For this reason, the number of 3D images displayed on the panel 10 per unit time (for example, 1 second) is observed by the user as half the field frequency (the number of fields generated per second).
- the plasma display device 40 when the panel 10 is driven by the 3D image signal, the plasma display device 40 according to the present embodiment reduces the field frequency in order to reduce flicker (a phenomenon in which the display image appears to flicker).
- the 2D image signal is doubled (for example, 120 Hz) when displayed on the panel 10. Therefore, one field period (for example, 8.3 msec) for displaying the 3D image signal on the panel 10 is half of one field period (for example, 16.7 msec) for displaying the 2D image signal on the panel 10. It becomes.
- a subfield with a large luminance weight is generated early in one field, and strong afterglow is converged within its own field as much as possible.
- the last subfield of one field is made a subfield with a small luminance weight, and leakage of afterglow into the next field should be reduced as much as possible.
- a subfield having a relatively large luminance weight is generated at the beginning of the field, and thereafter the luminance weight is decreased in the order in which the subfields are generated. It is desirable to make the last subfield of the field a subfield with a relatively small luminance weight so that afterglow leakage into the next field is reduced as much as possible.
- the luminance weight of each subfield excluding the subfield SF1 is set to be smaller as the subfield generated later in time.
- the number of subfields constituting one field and the luminance weight of each subfield are not limited to the above values.
- the subfield SF1 is the subfield with the smallest luminance weight
- the subfield SF2 is the subfield with the largest luminance weight
- the luminance weight is successively reduced after the subfield SF3
- the last subfield of the field is the luminance weight. May be the second smallest subfield.
- the light emission due to the initialization discharge is generated in all the discharge cells by the all-cell initialization operation of the subfield SF1.
- This light emission slightly increases the black luminance. Therefore, in the present embodiment, when a 3D image is displayed on panel 10, in both the right-eye field and the left-eye field, during the initialization period (all-cell initialization period) of subfield SF1
- the shutter glasses 50 are controlled so that the right-eye shutter 52R and the left-eye shutter 52L are both closed.
- the afterglow is also blocked by closing both the right-eye shutter 52R and the left-eye shutter 52L. Therefore, by delaying the shutter opening timing as much as possible, the period for blocking afterglow can be lengthened, and the effect of reducing crosstalk can be enhanced.
- the shutter glasses 50 it takes time corresponding to the characteristics of the material (for example, liquid crystal) constituting the shutter until the shutter is completely closed after the shutter starts to be closed or until the shutter is fully opened after the shutter is started to be opened. .
- the material for example, liquid crystal
- the user may perceive this as a change in hue.
- the decrease in emission luminance that occurs in the sustain period of the subfield SF1 is compensated to prevent the hue from changing. It will be described later.
- FIG. 6 is a diagram schematically showing the subfield configuration and the open / closed state of the right-eye shutter 52R and the left-eye shutter 52L when a 3D image is displayed on the plasma display device 40 in one embodiment of the present invention.
- FIG. 6 shows the drive voltage waveform applied to scan electrode SC1 and the open / closed states of shutter 52R for right eye and shutter 52L for left eye of shutter glasses 50.
- FIG. 6 shows two fields (right-eye field F1 and left-eye field F2).
- the control signal generation circuit 45 closes the right-eye shutter 52R until the initialization period of the subfield SF1 that is the first subfield ends, and maintains the subfield SF1.
- the sustain pulse of the sustain period of the last subfield (for example, subfield SF6) is opened before the start of the sustain period of subfield SF1 so that the average value of the transmittance in the period is less than 100% (for example, about 50%).
- a right eye shutter opening / closing timing signal is generated so as to close after the generation.
- the control signal generation circuit 45 closes the left-eye shutter 52L until the initialization period of the subfield SF1 ends, and averages the transmittance in the sustain period of the subfield SF1. Is opened before the start of the sustain period of the subfield SF1 so as to be less than 100% (eg, about 50%), and is closed after the sustain pulse generation of the sustain period of the last subfield (eg, the subfield SF6) is ended. A timing signal for opening and closing the left eye shutter is generated.
- the control signal generation circuit 45 causes the transmittance of the right-eye shutter 52R to be about 50% at time t2, which is the intermediate point of the sustain period in the subfield SF1 of the right-eye field F1.
- the right-eye shutter opening / closing timing signal is set so that the transmittance of the right-eye shutter 52R is 90% or more at the time t3 immediately before the start of the sustain period of the subfield SF2, and preferably the transmittance is 100%. appear.
- the shutter glasses 50 it takes time to open and close the shutter according to the characteristics of the material (for example, liquid crystal) constituting the shutter. Therefore, in the present embodiment, when closing the shutter, immediately before the start of the all-cell initialization operation, the shutter is set so that the transmittance of the shutter is 30% or less, preferably 10% or less.
- the closing timing may be set.
- the transmittance of the left-eye shutter 52L is 30% or less at time t1 immediately before the start of the all-cell initialization operation in the subfield SF1, which is the first subfield of the right-eye field F1.
- the control signal generation circuit 45 may generate a left-eye shutter opening / closing timing signal so that it is preferably 10% or less.
- the time from the end of the sustain pulse generation in the sustain period of the last subfield to the start of the all-cell initialization operation in the first subfield is set. Is desirable.
- the right-eye shutter 52R starts to be closed at time t4 immediately after the end of the sustain pulse generation in the subfield SF6 that is the final subfield of the right-eye field F1
- the right-eye shutter is used at time t5.
- An interval from time t4 to time t5 is provided so that the transmittance of the shutter 52R is 30% or less, preferably 10% or less.
- An interval from time t8 to time t9 is set so that the transmittance of the left-eye shutter 52L is 30% or less, preferably 10% or less at time t9 immediately before the start of the initialization operation.
- the timing for opening the shutter is set so that the transmittance of the shutter is 70% or more, preferably 90% or more, immediately before the start of the sustain period of the subfield SF2. .
- the transmittance of the right-eye shutter 52R is preferably 70% or more, preferably 90% or more.
- the timing for opening the shutter is set.
- the shutter is opened so that the transmittance of the left-eye shutter 52L is 70% or more, preferably 90% or more. Set the timing.
- an interval from time t2 to time t3 is provided so that at least the transmittance of the right-eye shutter 52R is 70% or more, preferably 90% or more at time t3. .
- an interval from time t6 to time t7 is provided so that at least the transmittance of the left-eye shutter 52L is 70% or more, preferably 90% or more at time t7.
- the opening / closing operation of the shutter is controlled in consideration of the time required from the start of closing the shutter until it is completely closed and the time required from the start of opening the shutter until it is fully opened.
- the timing at which the shutter opening / closing timing signal is switched from on to off and from off to on is set in advance according to the characteristics of the shutter glasses 50 and the field configuration, and the control signal generation circuit 45 is set in advance. It is assumed that a shutter opening / closing timing signal is generated according to the timing.
- the right eye shutter 52R and the left eye shutter 52L of the shutter glasses 50 turn on / off the shutter opening / closing timing signals (the right eye shutter opening / closing timing signal and the left eye shutter opening / closing timing signal) output from the timing signal output unit 46. Based on this, the opening / closing operation is controlled.
- shutter glasses 50 can perform all-cell initialization subfield (subfield SF1) in both the right-eye field and the left-eye field.
- Initialization period all-cell initialization period
- both the right-eye shutter 52R and the left-eye shutter 52L are closed. Therefore, the light emission generated by the all-cell initialization operation is blocked by the right-eye shutter 52R and the left-eye shutter 52L, and does not enter the eyes of the user.
- the user viewing the 3D image through the shutter glasses 50 cannot see the light emitted by the all-cell initialization operation, and the luminance of the emitted light can be reduced in black luminance.
- the shutter opening / closing timing signal so that the average value of the transmittance of the right eye shutter 52R or the left eye shutter 52L of the shutter glasses 50 is about 50% in the sustain period of the subfield SF1, the subfield SF1 is generated.
- the shutter opening / closing timing signal is generated so that the average value of the transmittance of the shutter becomes 100% in the sustain period, the period in which the right eye shutter 52R and the left eye shutter 52L are both closed to block the afterglow. Can be lengthened.
- a discharge cell having a phosphor layer for example, phosphor layer 35B
- a phosphor short afterglow phosphor
- it is used when the transmittance of the shutter decreases. A person may perceive a decrease in brightness.
- a long afterglow phosphor is used for the phosphor layer 35R and the phosphor layer 35G
- a short afterglow phosphor is used for the phosphor layer 35B
- the average value of the transmittance of the shutter in the sustain period of the subfield SF1 is used. It is assumed that the shutter glasses 50 are controlled so that the value becomes 50%.
- the user perceives that the light emission luminance of blue in the sustain period of the subfield SF1 is halved, the user observes an image in which the luminance of the blue is lowered and the hue is changed. Will be. Therefore, in this embodiment, in the discharge cell using the short afterglow phosphor, a decrease in light emission luminance that occurs during the sustain period of the subfield SF1 is compensated to prevent a hue change from occurring. The details will be described below.
- the subfield SF6 is an auxiliary subfield as will be described later.
- the following description will be given assuming that a short afterglow phosphor is used for the phosphor layer 35B and a long afterglow phosphor is used for the phosphor layer 35R and the phosphor layer 35G.
- the present invention is not limited to this configuration.
- the write operation is performed, and the write operation is not performed in the other subfields.
- the number of sustain discharges corresponding to the luminance weight “13” is generated in the discharge cell, and light emission with brightness corresponding to the gradation value “13” is generated, thereby displaying the gradation value “13”.
- the address operation is controlled in each subfield according to the coding shown in FIG.
- the discharge cell that performs the address operation based on the short afterglow phosphor coding has the same luminance weight “1” as that of the subfield SF1 when the address operation is performed in the subfield SF1. Similarly, the write operation is performed in the subfield SF6.
- the subfield SF1 can be calculated as the luminance weight “1”. Therefore, in the long afterglow phosphor coding, as shown in FIG. 7, the writing operation is not performed in the auxiliary subfield (subfield SF6) at any gradation value.
- the address operation is not performed in the discharge cell using the long afterglow phosphor, and the address operation is performed in the subfield SF1 in the discharge cell using the short afterglow phosphor.
- an “auxiliary subfield” for performing the writing operation is provided. That is, this auxiliary subfield always emits no light in the long afterglow phosphor coding, and always performs the same write operation as the subfield SF1 in the short afterglow phosphor coding.
- the provision of this auxiliary subfield compensates for a decrease in light emission luminance that occurs in the sustain period of subfield SF1 in a discharge cell using a short afterglow phosphor, and changes in hue occur. It becomes possible to prevent.
- the last subfield in one field may be used as an auxiliary subfield.
- the last subfield in a discharge cell using a long afterglow phosphor, the last subfield can always be made to emit no light, and the afterglow can be reduced during that time.
- the afterglow time is short, so that crosstalk is not deteriorated.
- a long afterglow phosphor with a time constant of about 3 msec is used for the phosphor layer 35R and the phosphor layer 35G
- a short afterglow phosphor with a time constant of about 0.1 msec is used for the phosphor layer 35B.
- long afterglow coding is used for the primary color signal sigR and the primary color signal sigG
- short afterglow coding is used for the primary color signal sigB.
- the present invention is not limited to this configuration. Is not to be done.
- the drive voltage waveform applied to scan electrode 22 in the all-cell initialization operation during 3D driving and the drive voltage waveform applied to scan electrode 22 in the all-cell initialization operation during 2D driving are shown.
- the configuration having the same waveform shape has been described, the present invention is not limited to this configuration.
- the gradient of the rising ramp waveform voltage in the all-cell initializing operation during 3D driving is made steeper than the gradient of the rising ramp waveform voltage in the all-cell initializing operation during 2D driving, or all the cells are initialized during 3D driving.
- the gradient of the downward ramp waveform voltage in the operation may be made steeper than the gradient of the downward ramp waveform voltage in the all-cell initialization operation during 2D driving, and the all-cell initialization operation during 3D driving may be performed.
- FIG. 5 shows an example in which a falling ramp waveform voltage is generated and applied to scan electrode SC1 through scan electrode SCn after the end of subfield SF6 and before the start of subfield SF1. This voltage does not have to be generated.
- scan electrode SC1 through scan electrode SCn, sustain electrode SU1 through sustain electrode SUn, and data electrode D1 through data electrode Dm are all set to 0 (V).
- maintain may be sufficient.
- one field is configured with eight subfields during 2D driving, and one field is configured with six subfields during 3D driving.
- the number of subfields constituting one field is not limited to the above number. For example, by increasing the number of subfields, the number of gradations that can be displayed on the panel 10 can be further increased.
- each circuit block shown in the embodiment of the present invention may be configured as an electric circuit that performs each operation shown in the embodiment, or a microcomputer that is programmed to perform the same operation. May be used.
- the present invention reduces the crosstalk generated between the right-eye image and the left-eye image for a user who views the display image through the shutter glasses in a plasma display device that can be used as a 3D image display device. Since a high 3D image can be realized, it is useful as a plasma display device, a plasma display system, and a panel driving method.
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Abstract
Description
図1は、本発明の一実施の形態におけるプラズマディスプレイ装置に用いるパネル10の構造を示す分解斜視図である。ガラス製の前面基板21上には、走査電極22と維持電極23とからなる表示電極対24が複数形成されている。そして、走査電極22と維持電極23とを覆うように誘電体層25が形成され、その誘電体層25上に保護層26が形成されている。
21 前面基板
22 走査電極
23 維持電極
24 表示電極対
25,33 誘電体層
26 保護層
31 背面基板
32 データ電極
34 隔壁
35,35R,35G,35B 蛍光体層
40 プラズマディスプレイ装置
41 画像信号処理回路
42 データ電極駆動回路
43 走査電極駆動回路
44 維持電極駆動回路
45 制御信号発生回路
46 タイミング信号出力部
50 シャッタ眼鏡
52R 右目用シャッタ
52L 左目用シャッタ
L1,L2,L4 ランプ電圧
L3 消去ランプ電圧
Claims (6)
- 走査電極と維持電極とからなる表示電極対を有する放電セルを複数備えたプラズマディスプレイパネルと、
初期化期間と書込み期間と維持期間とを有するサブフィールドを複数用いて1フィールドを構成し、前記初期化期間において全ての放電セルに初期化動作を行うサブフィールドを1フィールドの先頭サブフィールドにするとともに、右目用画像信号および左目用画像信号を有する画像信号にもとづき前記右目用画像信号を表示する右目用フィールドと前記左目用画像信号を表示する左目用フィールドとを交互に繰り返して前記プラズマディスプレイパネルに画像を表示する駆動回路と、
前記プラズマディスプレイパネルに前記右目用フィールドを表示するときにオンとなり前記左目用フィールドを表示するときにオフとなる右目用タイミング信号と、前記左目用フィールドを表示するときにオンとなり前記右目用フィールドを表示するときにオフとなる左目用タイミング信号とからなるシャッタ開閉用タイミング信号を発生する制御信号発生回路と、を備え、
前記制御信号発生回路は、前記先頭サブフィールドの前記初期化期間は前記右目用タイミング信号および前記左目用タイミング信号がともにオフになる前記シャッタ開閉用タイミング信号を発生し、
前記駆動回路は、残光時間の長い蛍光体を塗布された放電セルにおいては書込み動作を行わず、残光時間の短い蛍光体を塗布された放電セルにおいては前記先頭サブフィールドと同じ書込み動作を行う補助サブフィールドを1フィールド内に設けて前記プラズマディスプレイパネルを駆動する
ことを特徴とするプラズマディスプレイ装置。 - 前記駆動回路は、前記補助サブフィールドを1フィールドの最終サブフィールドとする
ことを特徴とする請求項1に記載のプラズマディスプレイ装置。 - 前記駆動回路は、前記先頭サブフィールドを、輝度重みの最も小さいサブフィールドとするとともに、前記補助サブフィールドを前記先頭サブフィールドと同じ輝度重みとする
ことを特徴とする請求項1に記載のプラズマディスプレイ装置。 - 前記残光時間の短い蛍光体を塗布された放電セルは青色に発光する放電セルであり、前記残光時間の長い蛍光体を塗布された放電セルは緑色に発光する放電セルおよび赤色に発光する放電セルである
ことを特徴とする請求項1に記載のプラズマディスプレイ装置。 - 走査電極と維持電極とからなる表示電極対を有する放電セルを複数備えたプラズマディスプレイパネルと、
初期化期間と書込み期間と維持期間とを有するサブフィールドを複数用いて1フィールドを構成し、前記初期化期間において全ての放電セルに初期化動作を行うサブフィールドを1フィールドの先頭サブフィールドにするとともに、右目用画像信号および左目用画像信号を有する画像信号にもとづき前記右目用画像信号を表示する右目用フィールドと前記左目用画像信号を表示する左目用フィールドとを交互に繰り返して前記プラズマディスプレイパネルに画像を表示する駆動回路と、
前記プラズマディスプレイパネルに前記右目用フィールドを表示するときにオンとなり前記左目用フィールドを表示するときにオフとなる右目用タイミング信号と、前記左目用フィールドを表示するときにオンとなり前記右目用フィールドを表示するときにオフとなる左目用タイミング信号とからなるシャッタ開閉用タイミング信号を発生する制御信号発生回路と、
を有するプラズマディスプレイ装置と、
それぞれ独立にシャッタの開閉が可能な右目用シャッタおよび左目用シャッタを有し、前記制御信号発生回路で発生した前記シャッタ開閉用タイミング信号でシャッタの開閉が制御されるシャッタ眼鏡とを備え、
前記シャッタ眼鏡は、前記先頭サブフィールドの前記初期化期間は前記右目用シャッタおよび前記左目用シャッタがともに閉じた状態となり、前記右目用フィールドにおける前記先頭サブフィールドの前記維持期間は前記右目用シャッタの透過率の平均値が100%未満となり、前記左目用フィールドにおける前記先頭サブフィールドの前記維持期間は前記左目用シャッタの透過率の平均値が100%未満となり、
前記駆動回路は、残光時間の長い蛍光体を塗布された放電セルにおいては書込み動作を行わず、残光時間の短い蛍光体を塗布された放電セルにおいては前記先頭サブフィールドと同じ書込み動作を行う補助サブフィールドを1フィールド内に設けて前記プラズマディスプレイパネルを駆動する
ことを特徴とするプラズマディスプレイシステム。 - 走査電極と維持電極とからなる表示電極対を有する放電セルを複数備えたプラズマディスプレイパネルの駆動方法であって、
初期化期間と書込み期間と維持期間とを有するサブフィールドを複数用いて1フィールドを構成し、前記初期化期間において全ての放電セルに初期化動作を行うサブフィールドを1フィールドの先頭サブフィールドにするとともに、右目用画像信号および左目用画像信号を有する画像信号にもとづき前記右目用画像信号を表示する右目用フィールドと前記左目用画像信号を表示する左目用フィールドとを交互に繰り返して前記プラズマディスプレイパネルに画像を表示し、
残光時間の長い蛍光体を塗布された放電セルにおいては書込み動作を行わず、残光時間の短い蛍光体を塗布された放電セルにおいては前記先頭サブフィールドと同じ書込み動作を行う補助サブフィールドを1フィールド内に設けて前記プラズマディスプレイパネルを駆動する
ことを特徴とするプラズマディスプレイパネルの駆動方法。
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