EP0887785A2 - Commande d'échelle de gris pour des dispositifs d'affichage à plasma - Google Patents

Commande d'échelle de gris pour des dispositifs d'affichage à plasma Download PDF

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Publication number
EP0887785A2
EP0887785A2 EP98203252A EP98203252A EP0887785A2 EP 0887785 A2 EP0887785 A2 EP 0887785A2 EP 98203252 A EP98203252 A EP 98203252A EP 98203252 A EP98203252 A EP 98203252A EP 0887785 A2 EP0887785 A2 EP 0887785A2
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EP
European Patent Office
Prior art keywords
gray level
brightness
subframe
sustain
subframes
Prior art date
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Application number
EP98203252A
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German (de)
English (en)
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EP0887785A3 (fr
EP0887785B1 (fr
Inventor
Keishin Nagaoka
Masaya Tajima
Yoshimasa Awata
Yoshikazu Kanazawa
Toshio Ueda
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Fujitsu Ltd
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Fujitsu Ltd
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Publication of EP0887785A3 publication Critical patent/EP0887785A3/fr
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2029—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having non-binary weights
    • 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
    • G09G3/2932—Addressed by writing selected cells that are in an OFF state
    • 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
    • G09G3/2935—Addressed by erasing selected cells that are in an ON state
    • 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
    • G09G3/2946—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 by introducing variations of the frequency of sustain pulses within a frame or non-proportional variations of the number of sustain pulses in each subfield
    • 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
    • G09G3/298—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 using surface discharge panels
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • 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

  • An AC PDP may make use of the memory effect.
  • AC PDPs there has been considered a two-electrode type in which selective discharge (address discharge) and sustain discharge are carried out with two electrodes, and a three-electrode type in which the third electrode is used for address discharge.
  • a phosphor formed in a discharge cell is excited by ultraviolet rays generated by the discharge.
  • the phosphor is easily affected by bombardment of ions (positive charges) generated concurrently by discharge.
  • the plasma display device may be a three-electrode surface discharge AC plasma display device.
  • the three-electrode surface discharge AC plasma display device may comprise first and second electrodes arranged in parallel with each other, and third electrodes orthogonal to the first and second electrodes, the first electrode being commonly connected together, and the second electrodes being arranged for display lines, respectively, wherein the display device has a surface discharge structure employing wall charges as memory media.
  • the number of sustain emissions of the each subframe may be so calculated, on the basis of actually measured data of the brightness with respect to the numbers of sustain emissions, that the sum of the absolute values of errors with the ideal values in the each gray level may become minimum, in order to make the relation between the gray level and the corresponding brightness linear.
  • the brightness of the second subframe having next larger gray level than that of the first subframe may not exceed the brightness of the first subframe, for the brightness of the first subframe having the arbitrary gray level.
  • the sum of the numbers of sustain emissions of one or two subframes in the plurality of subframes, or the sum of the numbers of sustain emissions of two or three subframes may be specified.
  • the brightness of the subframe having the maximum gray level may be specified in the plurality of subframes.
  • an embodiment of the present invention may be put into effect by a three-electrode surface-discharge AC plasma display device comprising first and second electrodes arranged in parallel with each other; and third electrodes orthogonal to the first and second electrodes, the first electrode being commonly connected together, and the second electrodes being arranged for display lines, respectively, wherein the display has a surface discharge structure employing wall charges as memory media, the plasma display device is driven by separate address periods in which display data are written in the whole screen by forming a wall charge, the wall charge is necessary for sustain discharge according to the display data from sustain discharge periods in which sustain discharge for light emission is repeated, one frame forming an image is constituted by a plurality of subframes each having a different brightness, the number of sustain emissions of the each subframe is individually set for the each subframe, and the image is displayed on the plasma display device by a gray scale display having a predetermined brightness.
  • the memory unit may be constituted by a vacant area of a driving wave-form memory device in the plasma display device, and the information on the number of sustain emissions in the each subframe may be set in the vacant area of the driving wave-form memory device.
  • the plasma display device may further comprise a brightness controller for adjusting the brightness, and the brightness controller may select one piece from the information on the number of sustain emissions in the each subframe set in the memory unit.
  • the number of sustain emissions in the each subframe may be set as a plurality of combinations in the memory unit, and an arbitrary one of the plurality of combinations may be selected by unit of selection signals supplied from the outside of the plasma display device.
  • the plasma display device may further comprise a consumed current controller unit for controlling and keeping the consumed current below a predetermined value, the number of sustain emissions in the each subframe may be set as a plurality of combinations in the memory unit, an arbitrary one of the plurality of combinations may be selected in response to the output from the consumed current controller unit, and thereby the power consumption may be kept constant regardless of the change of display rate.
  • the information on the number of sustain emissions in the each subframe may be supplied from outside the plasma display device.
  • reference mark X-UD denotes a signal (outputs Vs/Vw) for controlling the ON/OFF of the X common driver (22)
  • X-DD denotes a signal (GND) for controlling the ON/OFF of the common driver
  • Y-UD denotes a signal (outputs Vs/Vw) for controlling the ON/OFF of the Y common driver (24)
  • Y-DD denotes a signal (GND) for controlling the ON/OFF of the Y common driver.
  • each of the address electrodes 3 is connected to the address driver 21 and gets an address pulse of the address discharge time from the address driver.
  • the Y electrodes 8 are individually connected to the Y scan driver, and the Y scan driver 23 is connected to the Y common driver (Y driver 24).
  • the pulse of address discharge time is generated from the Y scan driver 23, and the sustain pulses and others come from the Y driver 24 and are applied to the Y electrodes 8 through the Y scan driver 23.
  • the X electrodes 7 are commonly connected over the display lines of the panel 30, and the X common driver (X driver 22) generates write pulses, sustain pulses, and the like.
  • These driver circuits (21, 22, 23, 24) are controlled by the control circuit 10, which is controlled by synchronous signals, display data signals and others supplied from outside of the device.
  • one aspect of the driving method shown in Fig. 4 is that the states of all the cells are equalized by whole-screen writing and whole-screen erasing which are carried out at the beginning of the address period and the whole-screen erasing is completed in the state where wall charges available in the subsequent line sequential writing discharge remain.
  • the Y electrodes are brought to the GND level, and at the same time, write pulses of the voltage Vw are applied to the X electrodes causing the whole-screen writing. At this time, ions of positive charges are accumulated to the address electrode, in reality on the surface of dielectric material such as phosphor. Further, in the next step, by applying erasing pulses of the voltage Ve, the whole-screen erasing is carried out.
  • the erasing discharge which makes the state in which there is no wall charge on the surface of the dielectric layer (MgO layer) of the X and Y electrodes, it is preferable to accumulate electrons, negative charges advantageous in the next addressing discharge on the MgO surface of Y electrode. Note that the voltage value of the residual wall charges should be at such a level as not to cause the sustain discharge even when sustain discharge pulses are applied to the X and Y electrodes.
  • FIGs 5A to 5D are diagrams illustrating how cells are driven in the plasma display device of Fig. 3.
  • Figs. 5A to 5D show diagrams of the arrangement of charges within a discharge cell and the state of discharge.
  • Fig. 5A shows the whole-screen (or overall) writing step (Positive charges (or ions) have accumulated on the address electrode.)
  • Fig. 5B shows the whole-cell sustain discharge step
  • Fig. 5C shows the whole-cell erasing step (The wall charge of the sustain discharge electrode is reduced to such a value as not to cause discharge even when sustain discharge voltage (Vs) is applied).
  • Vs sustain discharge voltage
  • Fig. 5D shows the selective writing step (address discharge: Writing discharge is done utilizing the wall charge of the address electrode).
  • Figure 6 shows timing chart for driving the plasma display device of Fig. 3, and shows the driving method in case of the 16 gray scales.
  • one frame is divided into four subframes (or subfields) SF1, SF2, SF3, and SF4.
  • the address periods Ta1, Ta2, Ta3, and Ta4 including the whole-screen writing periods Tw1, Tw2, Tw3, and Tw4 are of the identical length (time).
  • the lengths (periods of time) of the sustain discharge periods Ts1, Ts2, Ts3, and Ts4 are of the rate 1:2:4:8. Therefore, it is possible to display in 16 scales of brightness from 0 to 15 by selecting subframes to be lightened.
  • the brightness should be in linear relationship with the number of sustain discharges. If so, the relationship of the brightness with respect to the gray level (or the value of gray scale) is also linear.
  • the optimum numbers of sustain pulses are such, P1, P2, and P3, as to minimize bSl in the equation (12) which satisfies the conditions of the equations (4) to (11) when the equation (1) is obtained in first by actual measurement and the equation (2) is set.
  • the numbers of sustain emissions of each subframe in case when the sum of the squares of errors in each gray level with respect to the ideal values becomes minimum is calculated on the basis of data of the brightness actually measured for the numbers of sustain emissions.
  • the calculations are complex as compared with the embodiment shown in Fig. 8, but a result very close to optimum can be found.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)
EP98203252A 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma Expired - Lifetime EP0887785B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP28834593 1993-11-17
JP5288345A JP2856241B2 (ja) 1993-11-17 1993-11-17 プラズマディスプレイ装置の階調制御方法
JP288345/93 1993-11-17
EP94300695A EP0653740B1 (fr) 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma

Related Parent Applications (1)

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EP94300695A Division EP0653740B1 (fr) 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma

Publications (3)

Publication Number Publication Date
EP0887785A2 true EP0887785A2 (fr) 1998-12-30
EP0887785A3 EP0887785A3 (fr) 2000-03-29
EP0887785B1 EP0887785B1 (fr) 2002-11-06

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EP98203252A Expired - Lifetime EP0887785B1 (fr) 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma
EP94300695A Expired - Lifetime EP0653740B1 (fr) 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma

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EP94300695A Expired - Lifetime EP0653740B1 (fr) 1993-11-17 1994-01-31 Commande d'échelle de gris pour des dispositifs d'affichage à plasma

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EP (2) EP0887785B1 (fr)
JP (1) JP2856241B2 (fr)
KR (1) KR970000911B1 (fr)
DE (2) DE69431681T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856436A1 (de) * 1998-12-08 2000-06-15 Thomson Brandt Gmbh Verfahren zum Ansteuern eines Plasmabildschirms
EP1594114A2 (fr) * 2004-05-07 2005-11-09 Pioneer Corporation Dispositif d'affichage

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707302B1 (fr) * 1994-10-06 2003-02-26 Fujitsu General Limited Traitement d'échelle de gris utilisant un procédé de diffusion d'erreurs
JP3499058B2 (ja) * 1995-09-13 2004-02-23 富士通株式会社 プラズマディスプレイの駆動方法及びプラズマディスプレイ装置
JP3417246B2 (ja) 1996-09-25 2003-06-16 日本電気株式会社 階調表示方法
KR100669274B1 (ko) * 1996-11-12 2007-04-19 산요덴키가부시키가이샤 평면표시장치의구동방법
JP3672697B2 (ja) * 1996-11-27 2005-07-20 富士通株式会社 プラズマディスプレイ装置
TW371386B (en) 1996-12-06 1999-10-01 Matsushita Electric Ind Co Ltd Video display monitor using subfield method
JP2962253B2 (ja) * 1996-12-25 1999-10-12 日本電気株式会社 プラズマディスプレイ装置
DE19720876A1 (de) * 1997-05-17 1998-11-19 Grundig Ag Verfahren und Vorrichtung zur Kontrasteinstellung bei impulsbreitengesteuerten Bildanzeigen
KR19990011906A (ko) * 1997-07-25 1999-02-18 구자홍 칼라 플라즈마 디스플레이 패널의 서브 프레임 구동방식
JP2994631B2 (ja) * 1997-12-10 1999-12-27 松下電器産業株式会社 Ｐｄｐ表示の駆動パルス制御装置
JP2994630B2 (ja) * 1997-12-10 1999-12-27 松下電器産業株式会社 明るさによるサブフィールド数調整可能な表示装置
DE19756653A1 (de) * 1997-12-19 1999-06-24 Grundig Ag Vorrichtung zur Vermeidung einer Überhitzung eines Plasmadisplays
DE19800846C2 (de) * 1998-01-13 1999-12-09 Grundig Ag Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins eines Plasmadisplays
KR100489446B1 (ko) * 1998-03-17 2005-08-01 엘지전자 주식회사 플라즈마 표시패널 구동방법
JP3544855B2 (ja) * 1998-03-26 2004-07-21 富士通株式会社 表示ユニットの消費電力制御方法と装置、その装置を含む表示システム、及びその方法を実現するプログラムを格納した記憶媒体
JP3556103B2 (ja) * 1998-09-18 2004-08-18 富士通株式会社 Ｐｄｐの駆動方法
JP3399853B2 (ja) 1998-09-30 2003-04-21 三菱電機株式会社 表示パネルの表示制御回路
EP1022714A3 (fr) * 1999-01-18 2001-05-09 Pioneer Corporation Méthode de commande pour un panneau d'affichage à plasma
JP3580732B2 (ja) 1999-06-30 2004-10-27 富士通株式会社 色温度若しくは色偏差を一定にするプラズマ・ディスプレイ・パネル
KR100563406B1 (ko) * 1999-06-30 2006-03-23 가부시끼가이샤 히다치 세이사꾸쇼 플라즈마 디스플레이 장치
JP2001265277A (ja) * 2000-02-29 2001-09-28 Lg Electronics Inc プラズマディスプレイパネルの色温度調整方法
JP3427036B2 (ja) * 2000-03-30 2003-07-14 富士通日立プラズマディスプレイ株式会社 表示パネルの駆動方法及びパネル表示装置
DE10112622A1 (de) * 2001-03-14 2002-09-19 Grundig Ag Verfahren und Vorrichtung zur Verbesserung der Grauwertauflösung einer pulsbreitengesteuerten Bildanzeigevorrichtung
JP4698070B2 (ja) * 2001-06-07 2011-06-08 パナソニック株式会社 プラズマディスプレイパネルの駆動方法及びプラズマディスプレイ装置
JP4707887B2 (ja) * 2001-07-11 2011-06-22 パナソニック株式会社 表示制御装置及び表示装置
US7098876B2 (en) 2001-09-06 2006-08-29 Samsung Sdi Co., Ltd. Image display method and system for plasma display panel
EP1331624A1 (fr) * 2002-01-23 2003-07-30 Koninklijke Philips Electronics N.V. Méthode et dispositif de commande d'un panneau d'affichage à plasma
JP5049445B2 (ja) * 2002-03-15 2012-10-17 株式会社日立製作所 表示装置およびその駆動方法
JP2004085607A (ja) 2002-08-22 2004-03-18 Seiko Epson Corp 画像表示装置及び画像表示方法、並びに画像表示プログラム
EP1544838A1 (fr) * 2003-12-17 2005-06-22 Deutsche Thomson-Brandt Gmbh Méthode et dispositif pour réduire les effets des différences de charge des sous trames
EP1544837A1 (fr) * 2003-12-17 2005-06-22 Deutsche Thomson-Brandt Gmbh Méthode et dispositif pour réduir les effets des differences de charge des lignes de balayage
EP1695328B1 (fr) 2003-12-17 2008-07-16 Thomson Licensing Procède et dispositif permettant de réduire l'effet de charge sur une ligne
JP4563787B2 (ja) * 2004-12-10 2010-10-13 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及びその制御方法
KR100667540B1 (ko) * 2005-04-07 2007-01-12 엘지전자 주식회사 플라즈마 디스플레이 장치 및 그의 구동 방법
JP4653146B2 (ja) * 2007-07-25 2011-03-16 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及びその制御方法
KR20090125497A (ko) * 2008-06-02 2009-12-07 엘지전자 주식회사 플라즈마 디스플레이 장치 및 그의 구동 방법
JP4564095B2 (ja) * 2009-11-19 2010-10-20 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
JP4653233B2 (ja) * 2009-11-19 2011-03-16 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及びその表示方法
JP4653246B2 (ja) * 2010-04-16 2011-03-16 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及びその表示方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488891A2 (fr) * 1990-11-28 1992-06-03 Fujitsu Limited Méthode et circuit pour commander avec des gradations un dispositif d'affichage à panneau plat

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488891A2 (fr) * 1990-11-28 1992-06-03 Fujitsu Limited Méthode et circuit pour commander avec des gradations un dispositif d'affichage à panneau plat

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856436A1 (de) * 1998-12-08 2000-06-15 Thomson Brandt Gmbh Verfahren zum Ansteuern eines Plasmabildschirms
US6417823B1 (en) 1998-12-08 2002-07-09 Thomson Licensing S.A. Method of driving a plasma screen
EP1594114A2 (fr) * 2004-05-07 2005-11-09 Pioneer Corporation Dispositif d'affichage
EP1594114A3 (fr) * 2004-05-07 2009-09-16 Pioneer Corporation Dispositif d'affichage

Also Published As

Publication number Publication date
DE69424122T2 (de) 2001-02-01
EP0887785A3 (fr) 2000-03-29
EP0887785B1 (fr) 2002-11-06
EP0653740B1 (fr) 2000-04-26
DE69431681D1 (de) 2002-12-12
EP0653740A2 (fr) 1995-05-17
JPH07140928A (ja) 1995-06-02
DE69424122D1 (de) 2000-05-31
KR970000911B1 (ko) 1997-01-21
EP0653740A3 (fr) 1996-06-26
JP2856241B2 (ja) 1999-02-10
DE69431681T2 (de) 2003-03-13

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