EP1316936A1 - Procédé et dispositif de commande d'un panneau d'affichage à plasma - Google Patents

Procédé et dispositif de commande d'un panneau d'affichage à plasma Download PDF

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Publication number
EP1316936A1
EP1316936A1 EP01250422A EP01250422A EP1316936A1 EP 1316936 A1 EP1316936 A1 EP 1316936A1 EP 01250422 A EP01250422 A EP 01250422A EP 01250422 A EP01250422 A EP 01250422A EP 1316936 A1 EP1316936 A1 EP 1316936A1
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EP
European Patent Office
Prior art keywords
sub
field
cell
code word
video
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01250422A
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German (de)
English (en)
Inventor
Sébastien Weitbruch
Carlos Correa
Rainer Zwing
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Thomson Brandt GmbH
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Deutsche Thomson Brandt GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Priority to EP01250422A priority Critical patent/EP1316936A1/fr
Priority to AU2002365459A priority patent/AU2002365459A1/en
Priority to PCT/EP2002/012906 priority patent/WO2003046873A1/fr
Priority to TW91134014A priority patent/TW200409072A/zh
Publication of EP1316936A1 publication Critical patent/EP1316936A1/fr
Withdrawn legal-status Critical Current

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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
    • G09G3/2033—Display of intermediate tones by time modulation using two or more time intervals using sub-frames with splitting one or more sub-frames corresponding to the most significant bits into two or more sub-frames
    • 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
    • G09G3/2803—Display of gradations
    • 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
    • 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
    • G09G2320/0238—Improving the black level

Definitions

  • the invention relates to a method for processing video pictures for display on a display device. More specifically the invention is closely related to a kind of video processing for improving the response fidelity of an active matrix display like plasma display panel (PDP), organic light emitting diode (OLED) or other display device where the display elements generate light in a number of small lighting pulses in a frame period for brightness control.
  • PDP plasma display panel
  • OLED organic light emitting diode
  • plasma display panels are known for many years, plasma displays are encountering a growing interest from TV manufacturers. Indeed, this technology now makes it possible to achieve flat colour panels of large size and of limited depth without any viewing angle constraints.
  • the size of a plasma display panel may be much larger than that of any known classical CRT picture tube.
  • a plasma display panel comprises a matrix array of discharge cells which can be switched ON or OFF.
  • the grey levels of a plasma display panel are controlled by modulating a number of light pulses generated in the discharge cells. This time-modulation will be integrated by the eye over a period corresponding to the eye time response.
  • a good response fidelity of a plasma display panel corresponds to the ability to exactly switch on only the discharge cell of a plasma display panel which are specified by the corresponding pixel data of a video picture.
  • the ability of a local discharge cell to be switched on depends on the excitation of the neighbouring/surrounding discharge cells.
  • the reactivity of a discharge cell is much stronger if discharge cells surrounding the local cell are also excited at the same time.
  • the result of this conditioning effect is that the discharge cells located in the middle of an illuminated area of the plasma display panel will work perfectly but not the discharge cells located at a transition between a dark area and an illuminated area or single cells within a dark area.
  • a prior art solution provides for a regular excitation of all discharge cells for a short period at the beginning of each frame period of a plasma display panel.
  • This so-called priming operation reduces the contrast ratio of the plasma display panel by increasing the background luminance of the picture being displayed on the plasma display panel. And this is a disadvantage.
  • a self-priming sub-field is characterized by having a prelonged addressing period and/or a higher writing voltage.
  • a so-called refreshing code is used for sub-field coding in which for all input video values there is never more than one sub-field inactivated between two activated sub-fields in the SF code word.
  • the present invention relates to a kind of vertical peaking which aims to increase the level of a critical transition to assure a good conditioning of the cells. According to the invention before the sub-field code word for a current pixel is forwarded to the display driving unit it is analysed whether the cell excitation in an activated sub-field after an inactivated sub-field for the current pixel gets support by a parallel cascaded cell excitation of a neighbouring cell.
  • the sub-field code word for either the current pixel or the neighbouring pixel is modified in such a manner that the entry in the sub-field code word for the inactivated sub-field is replaced by an entry for an activated sub-field so that cell excitation in the activated sub-fields for the current pixel is supported by a parallel cascaded cell excitation in the neighbouring cell in order to maintain the cascade effect.
  • This inventive technique greatly improves the response fidelity of the plasma display panel without reducing the contrast ratio of the video picture to be displayed. This is true above all in case that the PDP is produced with matrix technology combined with the AWD addressing scheme.
  • This technique ensures a perfect transition between a black area and a grey area on a plasma display panel by supplying more energy to a discharge cell at the transition border than to a discharge cell at the middle of the grey area.
  • the peaking process according to the invention reinforces the vertical transitions in the picture, it is similar to the Mach phenomenon appearing behind the human retina and thus improves the sharpness impression of the picture.
  • the peaking algorithm is easy to implement since it does not request complicated computations but only three additional line memories.
  • the algorithm is combined with an optimised sub-field encoding process, in which the low order sub-fields are preffered for sub-field encoding, it is avoided to add too much luminance to the transitions that would be visible.
  • a plasma display technology makes it possible to produce real flat displays of large size and of very limited depth without any viewing angle constraints.
  • the display is an active matrix display and the light generation in each matrix cell is digitally controlled, it gives the possibility to achieve really perfect sharpness in the pictures like a pure transition black to white.
  • a plasma display panel utilizes a matrix array of discharge cells which could be switched ON or OFF. Unlike a CRT or LCD in which grey levels are expressed by analogue control of the light emission, a PDP controls the grey levels by modulating the number of light pulses per frame.
  • an electrical discharge will appear in a gas filled cell, called plasma and the produced UV radiation will excite a colored phosphor which emits the light.
  • a first selective operation called addressing in which a writing voltage is applied to the cell will create a charge in the cells to be lighted.
  • addressing In the cells that shall not generate light, there is no writing voltage applied to the cells during the addressing phase.
  • Each plasma cell can be considered as a capacitor which keeps the charge for a long time.
  • a general operation called "sustain" applied during the lighting period will add charges in the cell.
  • the two charges together will build up between two electrodes of the cell a firing voltage. UV radiation is generated which excites the phosphor for light emission. The discharge of the cell is made in a very short period and there remains some charge in the cell.
  • this charge is increased again up to the firing voltage so that the next discharge will happen and the next light pulse will produced.
  • the cell will be lighted in small pulses.
  • an erase operation will remove all the charges to prepare a new cycle.
  • FIG. 1 The principle structure of a plasma cell in matrix plasma display technologie is shown in Fig. 1.
  • Reference number 10 denotes the face plate made of glass. With reference number 11 a transparent line electrode is denoted.
  • the back plate of the panel is referenced with reference number 12.
  • In the back plate are integrated column electrodes 14 being perpendicular to the line electrodes 11.
  • the inner part of the cells consists of the luminous substance 15 (phosphor) and separators 16 for separating the different coloured phosphors (green 15a), (blue 15b), (red 15c) from each other.
  • the UV radiation caused by the discharge is denoted with reference number 17.
  • the light emitted from the green phosphor 15a is indicated with arrows having the reference number 18. From this structure of a PDP it is clear, that there are three plasma cells necessary, corresponding to the three colour components R,G,B, to produce the colour of a picture element of the displayed picture.
  • the brightness of each cell is controlled by modulating the number of light pulses per frame in the discharge cell.
  • a prior art solution is the so-called priming technique, wherein each cell will be regularly excited in a frame.
  • Fig. 3 shows an example of a sub-field organisation with 10 sub-fields and one priming period at the beginning. The weights of the sub-fields indicated by the numbers differ from the standard binary coding of Fig. 2.
  • This type of sub-field organisation and sub-field coding has advantages in regard to dynamic false contour effect reduction.
  • the priming period at the beginning consists of a strong writing pulse and an erase operation at the end.
  • WO 01/56003 This operation has to be used parsimoniously in the frame period to avoid a strong reduction of the contrast ratio, i.e.
  • priming will be used only ahead of the low order sub-fields to ensure their light generation.
  • the fact not to use priming ahead of high order sub-fields can lead to a non-homogeneity of the panel since the cell reaction for these sub-fields may depend a lot on the neighborhood activity.
  • Figs. 4A-E The illustrations shown in Figs. 4A-E will be used to explain the solution. In these figures also the 10 sub-field organisation of Fig. 3, wherein a priming operation is carried out only at the start of each frame is used.
  • the priming operation regularly excites each cell of the panel at the beginning of each frame. Consequently, the sustain operation in the first sub-field having the weight 1 is very effective due to its short time distance to the priming operation so that its behavior does not depend on the neighbouring cells. If the first sub-field is activated, the sustain operation in the next sub-field will be effective again since the energy stays concentrated in the time. In fact, if all the activated sub-fields are concentrated around the priming operation, it will ensure a perfect reaction of the cells which will be independent from the neighborhood. This effect is similar to a cascade effect.
  • the video value 31 is generated by generating light consecutively in the first 5 sub-fields behind the priming operartion.
  • the cascade effect means that each well-activated sub-field acts as a priming for the next one. This excitation spread from one sub-field to the next one starting from the priming operation as origin leads to a good response fidelity of the panel.
  • the sub-field code word for the value 225 includes for example an interruption of sub-field activation between the first and the sixth sub-field.
  • the light generation in the cells with the first activated sub-field of value 225 works without any problem.
  • the cascade effect is immediately interrupted after this first sub-field.
  • the cell excitation with the sixth sub-field is not supported by an excitation in the previous sub-field resulting in a strong dependence of the cell activation from the neighborhood activity.
  • a display cell for a pixel of a video picture having the value 225 located in a homogeneous area in which the neighboring cells are excited with the sixth sub-field will work very well. Due to the neighboring effect, the light generation with the sixth sub-field of the value 225 will be perfect resulting in a positive impact on following sub-fields also, i.e. a new cascade effect is possible.
  • FIG. 4C Such a case is shown in Fig. 4C.
  • a vertical transition is shown between a homogenous area having pixels with video values 63 for a colour component and a homogenous area having pixels with video values 225 for the same colourcomponent.
  • the light generation with the corresponding sub-field code words for the values 63 and 225 is shown.
  • the cells being driven with the video value 225 and lying on a line next to the region where a video value of 63 is valid will benefit from the excitation of the neighbouring cells above in the sixth sub-field.
  • the cascade effect for the last five activated sub-fields in case of the video values 225 will be present and the display shows a picture with a sharp transition.
  • Fig. 4D shows the effect of a lack of conditioning in the case of a vertical transition from a dark area with video level 7 for one colour component to a light area with video value 225 for the same colour component.
  • This kind of transition is a rather critical one above all in the case of the plasma matrix technology, which is quite sensitive to the neighborhood activity, in particular if an AWD (Address While Displaying) addressing scheme is used which excites one specific sub-field in a vertical direction one line after the other.
  • AWD Address While Displaying
  • the line memory includes L storage cells having the capacity of N bits per cell. L represents the number of pixels per line on the PDP screen and N represents the number of sub-fields in the used sub-field organisation.
  • Reference sign 20 denotes a line memory and reference sign 21 refers to a comparison unit.
  • the comparison algorithm carried out in the comparison unit 21 is as follows: In the line memory the sub-field code words of a line n-1 are stored. For generating the compensated sub-field code words for the next line n the comparison unit 21 compares each of the N bits of a sub-field code word for a pixel of line n from MSB to LSB with the corresponding bit of the corresponding sub-field code word for the corresponding pixel of line n-1.
  • each updated SF code word for line n will be entered in the line memory 20 so that after processing of a complete line the processing of the next line can start without delay and it is assured that the compensated code words are stored in the line memory as reference for the next line.
  • k represents a bit number and k ⁇ [1,N]. Further n represents the line number.
  • I n [k] is the k th bit of the SF code word of a pixel in line n.
  • I n-1 [k] represents the corresponding bit of the SF code word for the pixel located at the same horizontal position in line n-1.
  • the line memory 20 and the comparison unit 21 needs to be provided in triplicate in the plasma display apparatus.
  • FIG. 6 A computation example is illustrated in Fig. 6.
  • Fig 6 the SF code words of two corresponding pixels of line n and line n-1 are shown.
  • bit entry '1' means an activated sub-field, i.e. in this sub-field light is generated, and '0' means an inactivated sub-field in which no light is generated.
  • Fig. 6A shows the original SF code words for two corresponding pixels in line n and line n-1 before employing the vertical peaking algorithm.
  • the SF code word for the pixel of line n corresponds to the video value 95 and that of line n-1 to the value 39.
  • Fig. 6B illustrates 4 comparison operations and their results.
  • stage 1 the bit entries for sub-field SF8 are compared
  • stage 2 the bit entries for sub-field SF7 are compared
  • stage 3 the bit entries for sub-field SF5 are compared
  • stage 4 the bit entries for sub-field SF4 are compared.
  • Each comparison operation determines whether a bit entry in the SF code word for the pixel of line n needs to be modified or not.
  • the resulting modified SF code word for the pixel of line n is shown.
  • the compensated new SF code word corresponds to the video value 157.
  • the comparison algorithm according to the invention results in a modification of the video picture content. This can be visible.
  • the human visual system may be regarded as a picture encoder to reduce the information received by the retina to essential information which could be rapidly interpreted by the brain.
  • the pupil is working similar to a low-pass filter which reduces the amount of high spatial frequencies.
  • the inventive concept to the HVS it is not necessary to make a complete exposition of the human visual system but to extract some important characteristics thereof.
  • Fig. 7A illustrates this phenomenon.
  • Fig. 7A shows that the signal coming from the retina will be integrated to increase the sensitivity to high spatial frequency. Further studies have shown that this phenomenon is directly linked to the impression of sharpness and can be explained by a simple model of the neuronal structure behind the retina, as shown in Fig. 7B.
  • Fig. 7B illustrates the lateral inhibition happening between two adjacent neurons S1, S2.
  • the Mach phenomenon is directly responsible for the human sharpness impression.
  • the vertical peaking process according to the invention performs a similar processing as the human eye.
  • the inventive algorithm also improves the global sharpness impression of a video picture.
  • the improvement of the global sharpness of the picture is, however, effective only as long as the peaking does not add too much light on the transition.
  • a plasma optimized coding is used according to another aspect of the invention with which the energy is concentrated in the low-order sub-fields.
  • This encoding technique is based on slope increasing coding in which the weight of a sub-fields is increased slowly from one sub-field to another.
  • FIG. 8 An example of a sub-field organisation for such a coding is given in Fig. 8.
  • the numbers below the arrows represent the evolution of the weight difference between two consecutive sub-fields.
  • Fig. 9 it is shown that there are two possibilities to encode the value 43. However, only the first one (in the upper part) will be taken since it concentrates the energy in the low-order sub-fields.
  • the inventive peaking algorithm may further slightly increase the noise in a video picture. Therefore, a noise reduction algorithm like with a median filter may be used in the signal processing path behind the peaking algorithm to improve the quality of the peaking algorithm.
  • FIG. 10 a circuit implementation of the invention is illustrated.
  • Input R,G,B video data is forwarded to a sub-field coding unit 30.
  • the sub-field code words are forwarded to a memory 31 separately for the different colour components R,G,B.
  • This memory preferably has a capacity of two frame memories. This is recommendable due to the plasma driving process.
  • the plasma display panel is driven in sub-fields as explained above and therefore for every pixel only one bit (in fact three bits because of the three colour components) needs to be read out of this memory per sub-field.
  • data needs to be written in the memory.
  • the line memories 35 for the vertical peaking algorithm are placed between sub-field coding unit 30 and frame memory 31.
  • the comparison algorithm is best being performed by the control unit 34. It has read and write access to the storage cells of the line memories 35.
  • the resulting sub-field code words are collected in serial parallel conversion unit 32 for a whole line of the PDP. As there are e.g. 854 pixel in one line, this means 2962 sub-field coding bits needs to be read for each line per sub-field period. These bits are input in the shift registers of the serial parallel conversion unit 32.
  • the corrected sub-field code words are stored in memory unit 31. Reading and writing from and to this memory unit is also controlled by the external control unit 34. Also it controls the sub-field coding process and the serial parallel conversion. Further it generates all scan, sustain and erase pulses for PDP control. It receives horizontal and vertical synchronising signals for reference timing.
  • the luminance of the darker pixel of the transition is increased.
  • the top region of the transition has a video value of 225 and the bottom region of the transition has e.g. the value 8.
  • the modification of the sub-field code word for the pixel with value 8 would result in the corresponding sub-field code word 1111000000 having the assigned video value 15.
  • This kind of modification would reduce the Mach phenomenon and therefore could slightly reduce the sharpness impression.
  • This improvement however requires the implementation of two line memories per colour component. Also a delay of one video line for outputting the sub-field code words to the frame memory is required in this case.
  • the invention can be used in particular in PDPs.
  • Plasma displays are currently used in consumer electronics, e.g. for TV sets, and also as a monitor for computers.
  • use of the invention could also be appropriate for active matrix displays where the light emission is also controlled with small pulse in sub-fields, i.e. where the PWM principle is used for controlling light emission, e.g. OLED displays.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP01250422A 2001-11-30 2001-11-30 Procédé et dispositif de commande d'un panneau d'affichage à plasma Withdrawn EP1316936A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01250422A EP1316936A1 (fr) 2001-11-30 2001-11-30 Procédé et dispositif de commande d'un panneau d'affichage à plasma
AU2002365459A AU2002365459A1 (en) 2001-11-30 2002-11-18 Method and apparatus for processing video pictures
PCT/EP2002/012906 WO2003046873A1 (fr) 2001-11-30 2002-11-18 Procede et appareil de traitement d'images video
TW91134014A TW200409072A (en) 2001-11-30 2002-11-22 Method and apparatus for processing video pictures

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Application Number Priority Date Filing Date Title
EP01250422A EP1316936A1 (fr) 2001-11-30 2001-11-30 Procédé et dispositif de commande d'un panneau d'affichage à plasma

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EP1316936A1 true EP1316936A1 (fr) 2003-06-04

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AU (1) AU2002365459A1 (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1605429A1 (fr) * 2004-05-31 2005-12-14 Samsung SDI Co., Ltd. Procédé de commande d'un panneau d'affichage à plasma
EP1577868A3 (fr) * 2004-03-12 2007-04-11 Samsung Electronics Co., Ltd. Dispositif d'affichage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833299A1 (fr) * 1996-09-25 1998-04-01 Nec Corporation Procédé d'expression d'échelle de gris et dispositif d'affichage d'échelle de gris
EP1022713A2 (fr) * 1999-01-14 2000-07-26 Nec Corporation Méthode de commande d'un panneau d'affichage à plasma à courant alternatif

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833299A1 (fr) * 1996-09-25 1998-04-01 Nec Corporation Procédé d'expression d'échelle de gris et dispositif d'affichage d'échelle de gris
EP1022713A2 (fr) * 1999-01-14 2000-07-26 Nec Corporation Méthode de commande d'un panneau d'affichage à plasma à courant alternatif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577868A3 (fr) * 2004-03-12 2007-04-11 Samsung Electronics Co., Ltd. Dispositif d'affichage
EP1605429A1 (fr) * 2004-05-31 2005-12-14 Samsung SDI Co., Ltd. Procédé de commande d'un panneau d'affichage à plasma

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TW200409072A (en) 2004-06-01
AU2002365459A1 (en) 2003-06-10

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