EP1018107B1 - Panneau de visualisation a plasma alternatif integrant une ionisation et son procede de commande - Google Patents
Panneau de visualisation a plasma alternatif integrant une ionisation et son procede de commande Download PDFInfo
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- EP1018107B1 EP1018107B1 EP98945381A EP98945381A EP1018107B1 EP 1018107 B1 EP1018107 B1 EP 1018107B1 EP 98945381 A EP98945381 A EP 98945381A EP 98945381 A EP98945381 A EP 98945381A EP 1018107 B1 EP1018107 B1 EP 1018107B1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0216—Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0218—Addressing of scan or signal lines with collection of electrodes in groups for n-dimensional addressing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0238—Improving the black level
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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
- G09G3/297—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 opposed discharge type panels
Definitions
- the present invention relates to a method for controlling a alternative color display panel incorporating ionization.
- This process is particularly applicable to panels with color plasma displaying a large number of halftone and large size (more than one meter diagonal) for television application.
- Plasma panels work on the principle of electrical discharge in gases. They have two insulating tiles each carrying at least one network of electrodes, and delimiting between them a space filled with gas. The tiles are joined to each other by so that the electrode arrays are substantially orthogonal, one materializing rows and the other of the columns. Each intersection of electrodes defines a cell to which a gas space corresponds. The ignition of a given cell is carried out by the selection of two crossed electrodes to which we apply, at a given time, appropriate voltages for the potential difference to cause between these electrodes gas discharge and light emission. The cells are arranged in rows and columns.
- a barrier system between the bands allows to physically delimit the cells of the panel and to limit the diffusion phenomena from one color to another.
- a video pixel is composed of a triplet of cells (one red, one green, one blue).
- Discharges in a plasma display panel initiate correctly if the gaseous medium in which they occur is ionized.
- the display panels that are being developed for these television applications are “alternative” plasma panels.
- the electrodes carried by the tiles are isolated from the discharge gas by a dielectric layer, generally made on the basis of magnesia.
- a signal is permanently applied to all the lines maintenance formed by a succession of slots, which has the effect of maintain each cell in the state assigned to it during a phase addressing.
- Addressing which consists of either switching on or off selectively the panel cells is done by set of one or multiple lines and each line is scanned several times during the time display of an image or image cycle.
- the gaseous mixture of color panels is generally a mixture of neon and xenon at about 10% xenon. This mixture diffuses ionization poorly.
- the cells are delimited by barriers which have a role of containment, that is to say on the one hand, they are intended to prevent landfills from spreading to neighboring cells which should not be on and on the other hand to avoid the ultraviolet radiation created by a discharge in a given cell neither excites the phosphors of neighboring cells and does not generate lack of color saturation.
- These containment barriers do not are not conducive to the diffusion of ionization even if their height is less than the spacing between the two slabs and if they extend according to a single network of electrodes.
- the nature of the dielectric layer in contact with the mixture gas has the particularity of having a high emission coefficient secondary helping to start the landfill but this effect is not enough to solve this ionization problem.
- FIG. 1 There are also DC plasma panels in which the electrodes are in contact with the gas mixture see Fig. 1. Each cell is partitioned and the ionization problem is even more crucial. he could only be resolved by placing next to each useful cell 1 visible by the observer a conditioning cell 2 masked from the observer. The ignition of a conditioning cell 2 precedes that of a cell useful 1 neighbor. Usually a conditioning cell is provided for two useful cells. A section of such a panel is presented at the figure 1. The two tiles bear the reference 10a, 10b. Each of them carries a network of useful electrodes 11a, 11b. Each intersection useful electrodes 11a, 11b defines a useful cell 1.
- Partitions 3 of a part separate two neighboring useful cells 1 and secondly have a function spacer to guarantee proper positioning of the slabs 10a, 10b.
- Each useful cell 1 is adjacent to a conditioning cell 2. It is separated by a barrier 4 whose height is partially less than the gap between the two tiles 10a, 10b.
- a conditioning cell 2 is defined by the intersection of one of the electrodes 11a which also serves to define a useful cell 1 and a conditioning electrode 5.
- conditioning 6 which occurs in conditioning cell 2 and which precedes a useful discharge 7 which occurs in the useful cell 1 on the right.
- the conditioning discharge 6 is hidden from the observer (diagrammatically by one eye), because the slab 10b facing the observer carries a black network 8 for shield the packaging discharges 6.
- the discharge of conditioning 6 initiates useful discharge by pre-ionizing the gas mixture contained between the two tiles 10a, 10b.
- This structure with conditioning cells requires a network of electrodes and additional electronic circuits. She results in higher power consumption and the provision of more electrical power.
- Another disadvantage is that the minimum pitch between two cells useful 1 separated by a conditioning cell 2 is imposed by the size of this packaging cell 2. We lose space.
- the packaging discharges being masked from the observer, they do not introduce a background annoying light that reduces contrast.
- Another advantage is that the addressing of the cells of conditioning is separated from that of the useful cells which allows not not use time devoted to addressing useful cells to the addressing of conditioning cells.
- the greater the number of lines of the panel the greater the time spent at the processing of a line must be small or more the number of lines processed at the same time must be great.
- Figure 2 shows schematically the treatments applied to all lines of a display panel of this type.
- This ionization phase consists of various ignitions of all panel cells, alternating ignitions with various extinctions of all the cells in the panel.
- the ionization phase is represented with hatching, that is crossed out and the maintenance line is dotted.
- the present invention provides a method for controlling a alternative color display panel with a phase of preionization compatible with interlaced scans, this process to minimize the background light and to avoid a reduction in the time allocated to addressing.
- the present invention relates to the method of control of an alternative color display panel defined in claim 1.
- the maintenance signal has bearings connected by fronts serving as a transition.
- preconditioning registration is carried out by a pulse superimposed on a level, just after a transition, on a when a cell level maintenance discharge would occur registered on this line in the absence of preconditioning registration.
- the time is not critical, it is of course possible to place the preconditioning pulse at another location on the bearing.
- preconditioning registration takes place at minus one maintenance cycle before this erasing operation so as not to disrupt its effects.
- a registration operation is also carried out by an impulse superimposed on a bearing, in order to minimize the number of maintenance cycles between the preconditioning registration and the erasure operation, it is possible to give different amplitudes to the pulse of preconditioning and registration impulse.
- each set is subject to several successive treatments, a treatment consisting of addressing followed by at least one maintenance cycle, each treatment being associated with a control bit whose weight is representative of the duration of the processing.
- preconditioning registration only during one or a few treatments of the first set, these treatments being preferably associated with least significant bits.
- the registered line of the second set changes according to the processing bit of the first set. This change can be done within the same second set of lines, for example by permutation within the lines of the second set.
- This change can also be made within several sets of lines.
- the present invention also relates to the display panel defined in claim 16.
- a line control circuit will then validate the transmission of a signal received from second sequential transmission means to the line corresponding to the output to activate, when it has received at the same time a signal of the same type from the first means of transmission sequential.
- a line control circuit will validate the transmission of a signal received on one of its outputs, to the corresponding line, at the selected time where it will receive a signal of the same type from the means of transmission sequential.
- FIG. 3a represents a timing diagram showing the instants for addressing the lines of an alternative color display panel conventionally controlled with interlaced scans and susceptible to be controlled by the method according to the invention.
- a maintenance signal formed of a succession of EN maintenance cycles in time slots. It has the effect of maintaining each cell in the state assigned to it during addressing.
- the addressing is done set of lines by set of lines.
- a set has one or more lines, if the panel is large size each set preferably includes several.
- each set E1, E2, E3 has four lines Y1-Y4, Y5-Y8, Y9-Y12.
- Addressing consists in modifying the voltage across the cells to erase or register them. It involves a semi-selective operation consisting for example in extinguishing all the cells of a set followed by a selective operation consisting for example of registering only those to be registered.
- the selective operation allows differentiate the different cells of a line to act only on certain between them.
- the erasure is semi-selective and selective registration. It is also possible that the deletion is selective and semi-selective registration.
- the operation of erasing lines Y1-Y4 from a set E1 consists of superimposing an impulse lE on the maintenance slots EN that receives this set E1.
- the operation of registering certain cells of a line Y2 consists of superimposing a pulse 112 on the slots of maintenance EN that this line Y2 receives but also to apply on columns corresponding to the cells of the row not to be entered, pulses and nothing on the columns corresponding to the cells in front be registered. We can then differentiate the different cells of the line.
- An IM2 pulse on an X1 column masks the voltage II2, applied to line Y2 for the cell located at the intersection of the row Y2 and column X1 and the cell remains off.
- the erase pulse lE takes place during a low plateau pb it is unique for all lines Y1, Y2, Y3, Y4 of the addressed set.
- Figure 3b shows schematically on a timing diagram the known principle of interlaced scans used to obtain halftone.
- the panel has eight lines. that it displays eight halftone 2 3 and that a line set has only one line.
- each of the lines must be processed three times during the image cycle, each processing starting with an addressing which takes place at correctly chosen instants.
- These different treatments starting with addressing make it possible to modulate the duration of lighting of the panel cells.
- 24 treatments starting with addressing will be required. They are numbered in the diagram from 1 to 24.
- each treatment starting with a addressing is associated with a control bit whose weight is representative the duration of ignition of the cells lit by this addressing.
- the addressing time of a cell is the same for all the bits whatever their weight, what changes is the duration of treatment is say the duration of keeping the cell on or off. So the treatment by bit B0 lasts T / 7, processing by bit B1 lasts 2T / 7 and processing by bit B2 lasts 4T / 7. Recall that T represents the duration of a cycle image.
- a sequencing algorithm makes it possible to address all lines 3 times, respecting between two successive addresses of the same line the weight of the bit concerned.
- tad be the time interval between two addresses successive of two sets of lines by different bits
- the interval of time ⁇ ntad with n equal to the number of bits used for halftones.
- FIG. 4 similarly shows so that in FIG. 3a, the processing of several lines by the method according to the invention.
- a set E1, E2, E3, ... Em of lines has two lines and the four sets E1, E2, E3, ... Em shown correspond to eight lines Y1 to Y6, Yn-1, Yn.
- This IP preconditioning registration performs ionization of the panel and improves the response time of the panel cells during a registration or an interview.
- the IP preconditioning registration of the line Y3 takes place during the processing relating to bit B1 of the first set E1.
- the second set E2 is close to the first and it is processed just after the first E1 for the same bit B1 which means that the range of time ⁇ 'during which the IP preconditioning registration can take is the same whatever the bit weight; which is simple to set up artwork. It is of course possible to enter a line from any other set of lines.
- the Y3 line preconditioning registration is initialized by a preconditioning pulse which is superimposed on EN maintenance slots received by this line Y3.
- the preconditioning pulse carries the IP reference because it is it which is visible in the figure.
- This IP preconditioning pulse has an appropriate amplitude.
- IP preconditioning registration can also be found on lines Y4, Y5, Y6 at appropriate times. On line Y5, the inscription IP preconditioning takes place at the end of the plateau.
- One of the solutions to reduce the light background is to only carry out this preconditioning inscription only for a single bit of halftone or some of them, preferably for those of low weight because the ionization defects are no longer present on cells treated with bits affected by these weights.
- the duration of ignition of the line contributing to ionization since the duration of the ignition of preconditioning is directly proportional to the number of bits affected by preconditioning.
- no inscription of preconditioning is not carried out during the processing relating to bit B3 of the set E1 of lines.
- Another solution to reduce the background light is to start registration of preconditioning as late as possible.
- Free described in Figure 4 between the erasure of the lines of the set E1 and the erasure of the lines of the E2 assembly, three maintenance cycles elapse EN and we therefore have three successive high levels ph1, ph2, ph3 for welcome the IP pulse initializing the preconditioning registration of the line Y3.
- One way to minimize the number of maintenance cycles between pre-conditioning registration and deletion consists, for example, in adapt the amplitude of the preconditioning pulse by giving it a voltage value different from that of the selective enrollment pulse.
- the same line of a second together contributes to ionization during all treatments of a first together, if the first and second sets are treated successively by the same bit and if the line contributing to the ionization is lit during the maximum time, it will stay on for 100 maintenance cycles per image cycle. It will be very bright.
- the second set of lines has four lines and you performs a permutation of the lines of this set contributing to ionization, each of them will only stay on for 6 cycles maintenance by image cycle.
- the light background will be spread in the second group
- the following example shows that the contrast C is good in a display panel controlled by the method according to the invention.
- This contrast value is the result of a compromise between the number of lines of the display panel, the number of bits for which ionization assistance applies and the number of maintenance cycles during which the lines contributing to the ionization are on.
- FIGS. 5a and 5b which are now referred to illustrate two variants of plasma panels implementing the method of addressing command according to the invention.
- the plasma panel has a useful screen 10 formed using a network of line or line electrodes Y1 to Y6 crossed with a second array of column or column electrodes X1 to X6.
- each line and column intersection is a cell C1 to C36.
- Each line Y1 to Y6 is connected to an output SY1 to SY6 of a row management device 20, and each column X1 to X6 at an output SX1 to SX6 of a column management device 210.
- the function of the column management device 210 is in particular to apply the masking pulses to columns X1 to X6 IM2, IM3 ... applied to certain columns during addressing such as shows figure 3a.
- the line management device 20 comprises one or more line 22, 23 control circuits called 'line driver' by specialists of the domain. Each line control circuit has a number of outputs S1, S2, S3, all these outputs forming the outputs of the line management 20. Each of the line control circuits 22, 23 receives in permanent maintenance signal EN issued by one or more generators maintenance 21 and this maintenance signal is transmitted simultaneously on all lines Y1 to Y6 of the display panel.
- the line management device 20 also includes, cooperating with the maintenance generator 21, an addressing device 200 This addressing device 200 will transmit erasure signals IE, II registration and IP preconditioning registration at the right times, on outputs to activate good line control circuits, these signals superimposed on the EN maintenance signals.
- the maintenance generator 21 is in itself conventional and is not not described.
- the addressing device 200 operates in mode parallel while in Figure 5b it operates in serial mode.
- FIG. 5a also appear, outside the useful screen 10, two additional lines Yc1, Yc2 which are hidden from an observer. During the operation of the panel they are permanently on to improve ionization at the edge of the image as mentioned previously. They are connected for this purpose to an AC device delivering a conditioning signal.
- the addressing device 200 of FIG. Sa comprises a GS signal generator which delivers signals of three types: erase signals IE, write signals II, signals IP preconditioning registration to a GD data generator.
- the GD data generator delivers each of the signals it receives accompanied by an identification of a line 22, 23 control circuit recipient.
- the signals it delivers bear the references IEC, IIC, IPC. They arrive on a SEQ sequencer controlled by a control device COM.
- IEC, IIC, IPC signals including the identification of a recipient line command transmitted sequentially, each to a selected instant, towards the control circuit 22, 23 destination line.
- the GD data generator also delivers to a device selection of active output DS, each of the signals it receives accompanied by an identification of one or more circuit outputs line command to activate.
- the signals it delivers are referenced IES, IIS, IPS.
- the erase signals IE apply simultaneously to several outputs when the addressing is done set of lines by set of lines and that each set of lines has multiple lines, while those of registration II and IP preconditioning apply to a single output.
- IES, IIS, IPS signals including the identification of said or said outputs to be activated arrive in parallel mode to an AIG switch and are referred simultaneously, in bundles of three different types, each to said one or more outputs to be activated from the line control circuit recipient.
- the AIG switch also receives the IEC, IIC, IPC signals. including the identification of the destination line control circuit. This packet transmission of three signals of different types saves time.
- a line control circuit 22, 23 validates the transmission of a signal present on one of its outputs, to the corresponding line Y1 to Y6, at the chosen instant when it receives a signal of the same type coming from the SEQ sequencer.
- the control circuits 22, 23 can also receive a control circuit 25 for additional signals adapted to their needs.
- IES, IIS, IPS signals including the identification of said or said outputs to be activated arrive on a second sequencer SEQ ' ordered in synchronism with the first SEQ sequencer.
- the second SEQ 'sequencer transmits sequentially, at the same selected times, signals of the same type as those transmitted by the first sequencer SEQ but including said one or more outputs to activate towards all the circuits of command line 22, 23 having one or such outputs to activate.
- a line control circuit 22, 23 validates the transmission of a signal received from the second sequencer SEQ 'to the line corresponding to the output to activate when it has received a signal of the same type at the same time from the first SEQ sequencer.
- the GS signal generator can be produced by a counter, the GD data generator and the selection device DS by memories, the SEQ, SEQ 'by the switches three inputs, one output and the switcher by a multiplexer.
- FIGS. 6a, 6b show timing diagrams of the IEC signals, IIC, IPC, IES, IIS, IPS arriving on line control circuits respectively in parallel mode and in serial mode with for each figure shows the signals received on a line.
- the advantage of parallel mode is that it saves time for load data into components which is particularly sought when the panel to be ordered has a large number of rows and columns and that it is used for television application.
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Description
- un générateur de signaux délivrant des signaux des trois types,
- des moyens pour délivrer d'une part chaque signai accompagné d'une identification d'un circuit de commande destinataire et d'autre part chaque signal accompagné d'une identification d'une ou plusieurs sorties à activer de circuit de commande ligne,
- des premiers moyens pour transmettre séquentiellement, à un instant choisi, chaque signal accompagné de l'identification du circuit de commande destinataire vers ledit circuit de commande destinataire,
- des seconds moyens pour transmettre séquentiellement, au même instant choisi, un signal de même type accompagné de l'identification de ladite ou de lesdites sorties à activer vers la ou lesdites sorties à activer de tous les circuits de commande ligne destinataires possédant une ou de telles sorties.
- un générateur de signaux délivrant des signaux des trois types,
- des moyens pour délivrer d'une part chaque signal accompagné d'une identification d'un circuit de commande destinataire et d'autre part chaque signal accompagné d'une identification d'une ou plusieurs sorties à activer de circuit de commande ligne,
- des moyens pour transmettre séquentiellement, à un instant choisi, chaque signal accompagné de l'identification du circuit de commande 5 destinataire vers ledit circuit de commande destinataire,
- des moyens pour aiguiller simultanément, par paquets de trois de types différents, les signaux accompagnés de l'identification de ladite ou lesdites sorties à activer vers ladite ou lesdites sorties à activer du circuit de commande destinataire.
- la figure 1 (déjà décrite) : la structure d'un panneau de visualisation à plasma continu ;
- la figure 2 (déjà décrite) : les différents traitements appliqués à un panneau de visualisation alternatif dans lequel toutes les lignes subissent le même traitement en même temps;
- la figure 3a : un chronogramme montrant les instants d'adressage de quelques lignes d'un panneau de visualisation alternatif commandé classiquement avec des balayages entrelacés;
- la figure 3b : le principe des balayages entrelacés;
- la figure 4 : un chronogramme montrant le traitement de quelques lignes d'un panneau de visualisation commandé par le procédé conforme à l'invention ;
- les figures 5a, 5b : deux modes de réalisation d'un panneau de visualisation commandé par le procédé de l'invention ;
- les figures 6a, 6b; des chronogrammes montrant les signaux appliqués aux lignes des deux panneaux de visualisation des figures 5a, 5b
Claims (20)
- Procédé de commande d'un panneau de visualisation alternatif en couleur comportant des cellules arrangées au croisement d'électrodes lignes et d'électrodes colonnes, ces cellules ayant deux états l'un inscrit et l'autre éteint, les lignes formant au moins deux ensembles (E1, E2, Em), chaque ensemble comportant au moins une ligne (Y1, Yn), le procédé comportant les étapes suivantes:application sur les lignes d'un signal d'entretien (EN) formé d'une succession de cycles d'entretien et engendrant des décharges d'entretien au niveau des cellules inscrites, etadressage à des instants appropriés des ensembles de lignes (E1, E2, E3, En), l'adressage se faisant ensemble de lignes par ensemble de lignes et comportant une opération dite semi-sélective (IE) agissant sur toutes les cellules d'un ensemble, suivie d'une opération, dite sélective (II), agissant sur des cellules prédeterminées de l'ensemble, l'une des opérations étant une inscription (II) et l'autre un effacement,
- Procédé de commande d'un panneau de visualisation, selon la revendication 1, caractérisé en ce que le signal d'entretien comporte des paliers (pb, ph) reliés par des transitions (f), et l'inscription de préconditionnement (IP) est réalisée par une impulsion superposée à un palier.
- Procédé de commande d'un panneau de visualisation selon la revendication 2, caractérisé en ce que l'impulsion de préconditionnement (IP) a lieu juste après une transition (f) à un instant où devrait se produire une décharge d'entretien au niveau de cellules inscrites en l'absence d'impulsion de préconditionnement (IP).
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 1 à 3, caractérisé en ce que les opérations semi-sélective et sélective sont l'une un effacement et l'autre une inscription, et l'inscription de préconditionnement (IP) intervient le plus près possible d'un effacement (IE) de la ligne (Y3, Y4) du second ensemble (E2), de manière à réduire le temps d'inscription de cette ligne.
- Procédé de commande d'un panneau de visualisation selon la revendication 4, caractérisé en ce que l'inscription de préconditionnement (IP) intervient au moins un cycle d'entretien avant l'effacement (IE) de la ligne (Y3, Y4) du second ensemble (E2).
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 1 à 5, caractérisé en ce qu'en vue d'afficher une image avec des demi-teintes, chaque ensemble est soumis à plusieurs traitements successifs, un traitement consistant en un adressage suivi d'au moins un cycle d'entretien, chaque traitement étant associé à un bit de commande dont le poids est représentatif de la durée du traitement.
- Procédé de commande d'un panneau de visualisation selon la revendication 6, caractérisé en ce que les deux ensembles sont traités successivement par le même bit.
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 6 ou 7, caractérisé en ce que l'inscription de préconditionnement (IP) est réalisée pendant au moins un traitement du premier ensemble (E1).
- Procédé de commande d'un panneau de visualisation selon la revendication 8, caractérisé en ce que le traitement est associé à un bit de poids faible.
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 6 à 9, caractérisé en ce que la ligne du second ensemble (E2) inscrite par l'inscription de préconditionnement change selon le bit de commande traitant le premier ensemble (E1).
- Procédé de commande d'un panneau de visualisation selon la revendication 10, caractérisé en ce que le changement se fait au sein du méme second ensemble (E2).
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 10 ou 11, caractérisé en ce que le changement consiste en une permutation parmi les lignes du second ensemble (E2).
- Procédé de commande d'un panneau de visualisation selon la revendication 10, caractérisé en ce que le changement se fait au sein de plusieurs ensembles de lignes (E2, E3).
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 2 ou 3, caractérisée en ce que l'opération d'inscription est réalisée par une impulsion superposée à un palier, et l'impulsion réalisant l'inscription de préconditionnement a une amplitude différente de l'impulsion réalisant l'inscription.
- Procédé de commande d'un panneau de visualisation selon l'une des revendications 1 à 14, caractérisé en ce qu'il consiste à maintenir inscrite en permanence une ou plusieurs lignes supplémentaires (YC1, YC2) du panneau, ces lignes étant masquées à un observateur.
- Panneau de visualisation alternatif en couleur mettant en oeuvre le procédé selon l'une des revendications 1 à 15, comportant :des cellules (C1-C36) placées au croisement d'au moins un réseau d'électrodes lignes ou de lignes (Y1-Y6) avec au moins un réseau d'électrodes colonnes ou de colonnes (X1 à X6), les lignes formant au moins deux ensembles (E1-E2) d'au moins une ligne,un dispositif de gestion de ligne (20) et un dispositif de gestion de colonne (210) délivrant des signaux aux lignes (Y1-Y6) et aux colonnes (X1-X6), le dispositif de gestion de ligne (20) comportant :au moins un générateur d'entretien (21) délivrant des signaux d'entretien (EN) à toutes les lignes par l'intermédiaire d'au moins un circuit de commande ligne (22,23), chaque ligne (Y1-Y6) étant reliée à une sortie du circuit de commande ligne (22, 23) etun dispositif d'adressage (200) délivrant aux lignes via une sortie à activer d'un circuit de commande ligne destinataire, après validation du circuit de commande ligne, des signaux (IE, II, IP) de trois types qui se superposent aux signaux d'entretien parmi lesquels: des signaux d'effacement (IE) et d'inscription (II), ces signaux formant l'un une opération, dite, semi-sélective, agissant sur toutes les cellules d'un ensemble, l'autre une opération, dite sélective, agissant sur des cellules prédeterminées de l'ensemble, un adressage consistant en une opération semi-sélective (IE) suivie d'une opération sélective (II), les signaux (II, IE) correspondant à un adressage étant délivrés aux lignes des ensembles, ensemble par ensemble, et des signaux d'inscription de préconditionnement (IP)
le dispositif d'adressage (200), après une opération semi-sélective relative au premier ensemble (E1) délivre ces signaux d'inscription de préconditionnement (JP) aux cellules d'au moins une ligne du second ensemble, quel que soit l'état des cellules de la ligne et ceci hors du temps d'adressage du second ensemble et hors de l'opération sélective du premier ensemble. - Panneau de visualisation selon la revendication 16, caractérisé en ce que le dispositif d'adressage (200) comporte:un générateur de signaux (GS) délivrant des signaux (IE, II, IP) des trois types,des moyens (GD) pour délivrer d'une part chaque signal accompagné d'une identification d'un circuit de commande ligne destinataire (IEC, IIC, IPC) et d'autre part chaque signal accompagné de l'identification d'une ou plusieurs sorties à activer de circuit de commande ligne (IES, IIS, IPS),des moyens (SEQ) pour transmettre séquentiellement, à un instant choisi, chaque signal accompagné de l'identification du circuit de commande destinataire (IEC, IIC, IPC) vers ledit circuit de commande ligne destinataire (22, 23),des moyens (AIG) pour aiguiller simultanément, par paquets de trois, de types différents, les signaux accompagnés de l'identification de ladite ou de lesdites sorties à activer (IES, IIS, IPS) vers ladite ou lesdites sorties à activer du circuit de commande ligne destinataire.
- , Panneau de visualisation selon la revendication 17, caractérisé en ce qu'un circuit de commande ligne (22, 23) valide la transmission d'un signal reçu sur une de ses sorties, vers la ligne correspondante, à l'instant choisi où il reçoit un signal de même type des moyens (SEQ) de transmission séquentielle.
- Panneau de visualisation selon la revendication 16, caractérisé en ce que le dispositif d'adressage comporteun générateur de signaux (GS) délivrant des signaux des trois types,des moyens (GD) pour délivrer d'une part chaque signal accompagné d'une identification d'un circuit de commande destinataire (IEC, IIC, IPC) et d'autre part chaque signal accompagné d'une identification d'une ou plusieurs sorties à activer de circuit de commande ligne (IES, IIS, IPS),des premiers moyens (SEQ) pour transmettre séquentiellement, à un instant choisi, chaque signal accompagné de l'identification du circuit de commande destinataire vers le dit circuit de commande ligne destinataire,des seconds moyens (SEQ') pour transmettre séquentiellement, au même instant choisi, un signal de même type accompagné de l'identification de ladite ou de lesdites sorties à activer vers la ou les dites sorties à activer de tous les circuits de commande ligne destinataires possédant une ou de telles sorties.
- Panneau de visualisation selon la revendication 19, caractérisé en ce qu'un circuit de commande ligne (22, 23) valide la transmission d'un signal reçu des seconds moyens (SEQ') de transmission séquentielle vers la ligne correspondant à la sortie à activer lorsqu'il a reçu au même instant un signal de même type en provenance des premiers moyens (SEQ) de transmission séquentielle.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9712133 | 1997-09-30 | ||
FR9712133A FR2769115B1 (fr) | 1997-09-30 | 1997-09-30 | Procede de commande d'un panneau de visualisation alternatif integrant une ionisation |
PCT/FR1998/002065 WO1999017269A1 (fr) | 1997-09-30 | 1998-09-25 | Procede de commande d'un panneau de visualisation a plasma alternatif integrant une ionisation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1018107A1 EP1018107A1 (fr) | 2000-07-12 |
EP1018107B1 true EP1018107B1 (fr) | 2001-08-16 |
Family
ID=9511620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98945381A Expired - Lifetime EP1018107B1 (fr) | 1997-09-30 | 1998-09-25 | Panneau de visualisation a plasma alternatif integrant une ionisation et son procede de commande |
Country Status (9)
Country | Link |
---|---|
US (1) | US6198227B1 (fr) |
EP (1) | EP1018107B1 (fr) |
JP (1) | JP2001518645A (fr) |
KR (1) | KR20010023525A (fr) |
CN (1) | CN1272196A (fr) |
DE (1) | DE69801372T2 (fr) |
FR (1) | FR2769115B1 (fr) |
TW (1) | TW408295B (fr) |
WO (1) | WO1999017269A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69937122T2 (de) | 1998-09-04 | 2008-01-10 | Matsushita Electric Industrial Co., Ltd., Kadoma | Verfahren und Einrichtung zum Steuern eines Plasmabildschirms mit höherer Bildqualität und hohem Leuchtwirkungsgrad |
FR2795218B1 (fr) * | 1999-06-04 | 2001-08-17 | Thomson Plasma | Procede d'adressage d'un panneau de visualisation a effet memoire |
FR2805918B1 (fr) * | 2000-03-06 | 2002-05-24 | Thomson Plasma | Procede de commande d'un panneau d'affichage au plasma |
CN111239236A (zh) * | 2020-01-16 | 2020-06-05 | 安徽省东超科技有限公司 | 一种空气电离显示装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3979638A (en) * | 1974-04-15 | 1976-09-07 | Bell Telephone Laboratories, Incorporated | Plasma panel with dynamic keep-alive operation |
FR2635901B1 (fr) * | 1988-08-26 | 1990-10-12 | Thomson Csf | Procede de commande ligne par ligne d'un panneau a plasma du type alternatif a entretien coplanaire |
FR2635902B1 (fr) * | 1988-08-26 | 1990-10-12 | Thomson Csf | Procede de commande tres rapide par adressage semi-selectif et adressage selectif d'un panneau a plasma alternatif a entretien coplanaire |
FR2635900B1 (fr) * | 1988-08-30 | 1990-10-12 | Thomson Csf | Panneau a plasma a adressabilite accrue |
US5099173A (en) | 1990-01-31 | 1992-03-24 | Samsung Electron Devices Co., Ltd. | Plasma display panel having an auxiliary anode on the back substrate |
FR2657713A1 (en) * | 1990-01-31 | 1991-08-02 | Samsung Electronic Devices | Plasma visual display screen and method of manufacturing it |
EP1231590A3 (fr) * | 1991-12-20 | 2003-08-06 | Fujitsu Limited | Circuit de commande d'un panneau d'affichage |
JP3276406B2 (ja) * | 1992-07-24 | 2002-04-22 | 富士通株式会社 | プラズマディスプレイの駆動方法 |
FR2744275B1 (fr) * | 1996-01-30 | 1998-03-06 | Thomson Csf | Procede de commande d'un panneau de visualisation et dispositif de visualisation utilisant ce procede |
JP3704813B2 (ja) * | 1996-06-18 | 2005-10-12 | 三菱電機株式会社 | 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 |
-
1997
- 1997-09-30 FR FR9712133A patent/FR2769115B1/fr not_active Expired - Fee Related
-
1998
- 1998-09-25 CN CN98809418A patent/CN1272196A/zh active Pending
- 1998-09-25 WO PCT/FR1998/002065 patent/WO1999017269A1/fr not_active Application Discontinuation
- 1998-09-25 KR KR1020007002171A patent/KR20010023525A/ko not_active Application Discontinuation
- 1998-09-25 US US09/508,774 patent/US6198227B1/en not_active Expired - Fee Related
- 1998-09-25 EP EP98945381A patent/EP1018107B1/fr not_active Expired - Lifetime
- 1998-09-25 JP JP2000514253A patent/JP2001518645A/ja active Pending
- 1998-09-25 DE DE69801372T patent/DE69801372T2/de not_active Expired - Fee Related
- 1998-09-28 TW TW087116102A patent/TW408295B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1272196A (zh) | 2000-11-01 |
EP1018107A1 (fr) | 2000-07-12 |
DE69801372D1 (de) | 2001-09-20 |
FR2769115B1 (fr) | 1999-12-03 |
WO1999017269A1 (fr) | 1999-04-08 |
TW408295B (en) | 2000-10-11 |
DE69801372T2 (de) | 2002-05-29 |
FR2769115A1 (fr) | 1999-04-02 |
JP2001518645A (ja) | 2001-10-16 |
KR20010023525A (ko) | 2001-03-26 |
US6198227B1 (en) | 2001-03-06 |
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