WO1998000826A1 - Procede d'activation des cellules d'un ecran de visualisation d'image, et dispositif de visualisation d'image mettant en oeuvre le procede - Google Patents
Procede d'activation des cellules d'un ecran de visualisation d'image, et dispositif de visualisation d'image mettant en oeuvre le procede Download PDFInfo
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- WO1998000826A1 WO1998000826A1 PCT/FR1997/001123 FR9701123W WO9800826A1 WO 1998000826 A1 WO1998000826 A1 WO 1998000826A1 FR 9701123 W FR9701123 W FR 9701123W WO 9800826 A1 WO9800826 A1 WO 9800826A1
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- current
- activation
- solenoid
- voltage
- main 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
- G09G3/22—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
-
- 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 activating cells forming the elementary image points of an image display screen. It advantageously applies in cases where the activation of the cells requires the supply of a current of short duration and of high intensity.
- the invention also relates to an image display device using this method.
- the activation of the cells of a display screen requires the supply of a current of higher intensity, the greater the number of cells to be activated simultaneously.
- These conditions are found in different types of display screen to which The invention can therefore be applied, in particular plasma panels, light-emitting diode screens, liquid crystal screens, or screens of the type whose elementary cells use a phenomenon known as "peak effect" to produce each one an electron beam II it should be noted that the simultaneity of actuation of the cells is more affirmed in the screens which implement an effect called "memory effect"
- FIG. 1 the diagram shown in Figure 1 is that of a PAP with two crossed electrodes to define a cell.
- the PAP includes a network of electrodes Y1 to Y4 called
- line electrodes crossed with a second network of electrodes X1 to X4 called column electrodes At each intersection of line and column electrodes corresponds a cell C1 to C16 These cells are thus arranged along lines L1 to L4 and columns
- Each line electrode Y1 to Y4 is connected to an output stage
- each column electrode X1 to X4 is connected to an output stage SX1 to SX4 of a column 3 control device
- the operations of these two control devices 2, 3 are controlled by an image management device 4
- the line control device 2 comprises a generator called “maintenance” 5, responsible for producing activation signals of the cells called “maintenance signals” SE
- the maintenance generator 5 delivers the maintenance signals SE by an output circuit 6, which itself distributes them to each output stage SY1 to SY4, so that these signals SE are applied simultaneously to all the line electrodes Y1 to Y4
- the line control device 2 generally comprises elements (not shown) which cooperate with the line output stages SY1 to SY4 in order, when addressing a given line L1 to L4, to superimpose the signals maintenance signal SE specific to the addressing, and this only for the line electrode Y1 to Y4 which corresponds to the line L1 to L4 addressed Figure 2a represents the SE maintenance signals, and Figure 2b illustrates the relationship phase, between the current calls debited by the line 2 control device and the SE maintenance signals
- the maintenance signals SE consist of successive voltage slots with a period P of the order of, for example, 8 to 10 microseconds
- the reference potential Vo is applied to the column electrodes X1 to X4, so that the maintenance signals SE develop alternately positive and negative voltages at the terminals of cells C1 to C16, of 150 volts in the example, which each generate a discharge in the cells which are in the "on" state
- discharge current ID which is supplied by the control device line 2
- discharge current ID changes direction depending on whether it is established from a positive bearing p + or a negative bearing p-
- Capacitive current le which is in phase with each transition Tn, Tp of the maintenance signals, and which corresponds to the current necessary to charge alternately in positive and in negative the overall capacity c PAP presented by the PAP
- This overall capacity of the PAP is constituted by various parasitic and other capacities presented in particular by the screen 1 itself, which are formed for example by the row and column electrodes Y1 at Y4 and X1 at X4, the printed circuit tracks, and the various connections and circuits, plus the parasitic capacitances presented by the elements responsible for developing the maintenance signals SE in the line 2 control device.
- the overall capacity c PAP can have a value of 10 nF in the case of a screen 1 having 4 or 5 dm 2 , having for example 512 row electrodes and 512 column electrodes which constitute kill 512 X 512 cells
- the value of the overall capacity c PAP depends a lot on the technologies used
- the discharge current ID corresponds to the sum of the currents consumed simultaneously by the discharges of all the cells which are in the "on" state. Its intensity can therefore vary significantly.
- the maximum intensity 11 of the discharge current ID in the case of a screen having 512 row electrodes and 512 column electrodes, can reach a considerable value, of 10 amps for example, a value which also depends on the technologies used
- the maintenance generator 5 comprises a negative voltage source 7 and a positive voltage source 8, which respectively deliver the negative voltages V1 and positive V2 corresponding to the potentials of the negative and positive bearings p-, p + of the maintenance signals SE
- Les voltage sources 7, 8 are connected to a common point Pc each by means of a switch element 10, 11
- switch elements are for example constituted by MOS type transistors, allowing in very short times, to pass d 'a "closed” or “passing” state in which they close the circuit, to an "open” or “blocked” state in which they open the circuit
- the switching elements 10, 11 are controlled from a clock device 13, by which they are put in the "on” state or in the "blocked” state.
- the maintenance signals SE are transmitted to the output circuit 6, from where they are distributed to each of the output stages SY1 to SY4
- the voltage sources 7, 8 fail to deliver with the required qualities, the voltages V1, V2 or the discharge current ID under which these voltages are delivered This is due in particular to the internal resistances of the voltage sources 7, 8, resistors internal which are far from negligible even for voltage sources of particularly sophisticated technique as is the case of those which are commonly used to fulfill the functions of sources 7, 8
- the harmful effects which result therefrom are for example - significant voltage drops and internal dissipations,
- the maintenance generator 5 cannot always deliver the maintenance signals under a current established in a sufficiently short time so as not to harm the physical phenomenon of the discharge in the cells.
- a known solution consists in multiplying or oversizing all or part of the elements which participate in developing the maintenance signals SE and applying them to the cells, as well as in making a choice and a selection of the components But this solution greatly increases the costs by bringing only partial improvements
- One of the aims of the present invention is to reduce, or even eliminate the supply faults in voltage and current of the cells, and more particularly the faults linked to the insufficiencies of the generator producing the activation signals of the cells, that is to say the maintenance signals in the case of a PAP
- the invention proposes to supply the cells using a solenoid so as to provide a source of more suitable current than conventional maintenance generators, to provide very short duration currents and very high intensity
- the invention relates to a method for activating the cells of an image display screen, which consists in producing cyclically so-called “activation” signals and applying them to the cells, the activation signals having a period during which they generate at least one cell activation phase, the activation of the cells determining a consumption of a so-called “discharge” current, the method being characterized in that to produce the activation signals, it consists in take signals from the terminals of a solenoid resulting from the application of at least one voltage to the solenoid, and in that it consists in increasing and decreasing in said solenoid a current called "main" of which at least a part at during decay, constitutes the discharge current
- the invention also relates to an image display device comprising, a screen having a plurality of cells and having a so-called global capacity, a control device delivering activation signals, the application of which to the cells produces cyclically an activation. of the latter, the activation of the cells generating the consumption of a current called discharge current, characterized in that the control device comprises a solenoid cooperating with switching means and at least one voltage source on the one hand , produce at the terminals of the solenoid signals serving to constitute the activation signals, and on the other hand to make increase and decrease in the solenoid a current called main current which at a moment of its decrease, is used to constitute the discharge current
- FIG. 1, already described, represents a plasma panel according to the prior art
- FIGS. 2a, 2b already described show signals used to activate cells shown in FIG. 1,
- FIG. 3 schematically represents a plasma panel according to the invention making it possible to implement the method of the invention
- FIGS. 4a to 4g form a timing diagram illustrating the implementation of the method of the invention
- FIGS. 5a and 5b respectively show a current established in a solenoid and maintenance signals developed at the terminals of this solenoid, in the case where these maintenance signals have a duty cycle different from 1;
- FIG. 6 schematically represents a variant of the invention making it possible to produce maintenance signals SE of which negative bearings are at ground potential
- FIG. 7 represents the signals obtained with the assembly shown in FIG. 6,
- FIG. 8 shows a version of the invention which makes it possible to carry out time intervals in which the current in a solenoid has a zero value
- Figures 9a to 9 k constitute a timing diagram illustrating the operation in the version of the invention shown in figure 8
- FIG. 3 schematically represents an image display device according to the invention, making it possible to supply cells to activate them according to the method of the invention
- the display device is a plasma panel or alternative PAP, similar to the classic PAP shown in Figure 1, except for the line control device
- the PAP of the invention comprises a display screen 1 similar to that shown in FIG. 1, as well as a line control device 2A, a column control device 3 and an image management device 4 which are organized around of screen 1, in the same way as in the case of the prior art already explained with reference to FIG. 1
- the line control device 2A of the invention comprises an activation signal generator 20, by which the signals are produced activation or maintenance signals SE, and which delivers them to the output stages SY1 to SY4 of the line control device 2A.
- the signal generator 20 includes a solenoid SL, responsible for delivering the discharge current ID consumed by cells C1 to C16 activated.
- the signal generator 20 also comprises a first voltage source 21, the negative output of which is connected to a reference potential Vo which is ground in the example, so as to deliver via its output. "+” a positive voltage V2 of 150 volts for example. This output "+” is connected via a first switching element S1 fulfilling a switch function, at a point which constitutes, the output 22 of the signal generator 20, output 22 by which the latter delivers the signals SE maintenance.
- a first diode D1 is connected in parallel to the first switching element S1 or first switch S1, with the anode on the side of the output 22 and its cathode towards the first voltage source 21.
- One of the ends of the solenoid SL is connected to the reference potential Vo constituted by the ground, and its other end is connected to the output point 22
- a second switching element or second switch S2 has one end connected to the output point 22, and its other end is connected to the negative output V- of a second voltage source 23 whose positive output "+" is connected to ground.
- a capacitance cS shown in dotted lines, in order to illustrate the possibility of replacing one or the other of the two voltage sources 21, 23 with a capacitance, as is explained further in a description below.
- the negative voltage V- has a value for example of 150V
- a second diode D2 is mounted in parallel with the second switch S2, the anode and the cathode of this second diode D2 being respectively connected to the second voltage source 23 and to the point outlet 22
- the first and second switches S1, S2 are of a type similar to the switching elements 10, 1 1 used in the maintenance generator 5 shown in FIG. 1 They are controlled to be put, either in a "on” state in which they close the circuit, either in a "blocked” state in which they open the circuit
- These switches S 1, S2 are controlled by a clock circuit H1 in itself conventional, delivering cyclically signals controlling the "on” state or the "blocked” state of the switches S1, S2, according to the operation which is described below
- the principle of operation is to use a solenoid as a current generator.
- a current IL called "main current” linearly between zero and a value of intensity Imax, of value at least equal to the current of discharge ID
- the following operation is obtained when the discharge occurs in the cells,
- the main current IL in the solenoid SL has just started to decrease after reaching Imax
- the energy in the solenoid is practically 1/2 L Ima ⁇ 2 (L being the value of the solenoid SL) and the p ⁇ ncipal current IL seeks to circulate by all the possible paths II will therefore naturally circulate through the cells in the "on" state of the screen 1 at the time of discharge and thus allow l ignition of these cells
- FIGS. 4a to 4g constitute a timing diagram which illustrates the operation explained above.
- FIG. 4a represents the voltage signals developed at the terminals of the solenoid SL, that is to say present at the output point 22 and which constitute the signals d SE interview
- FIG. 4b represents the evolution over time of the main current IL in the solenoid SL
- FIG. 4c represents the conduction in the first diode D1
- FIG. 4d represents the conduction of the first switch S1
- FIG. 4e represents the discharge current ID by peaks IDa, IDb which illustrate the reversal of the direction of the discharge current during two consecutive discharges.
- FIG. 4f represents the conduction by the second diode D2
- FIG. 4g represents the conduction by the second switch S2
- the first switch S1 is set to the "on" state and the positive voltage V2 delivered by the first source 21 is applied to the point output 22 From which it follows on the one hand that the maintenance signals SE are at the value of the positive voltage V2 in a phase which corresponds to a part of positive plateau p +, and on the other hand that the main current IL increases linearly with a slope equal to V2 / L, with a first direction of circulation IL1
- the clock circuit H1 controls the putting in the "blocked" state of the first switch S1. Consequently the first voltage source 21 is no longer connected to the output point 22 nor to the solenoid SL, and therefore the voltage positive V2 is no longer applied to the solenoid
- This oscillatory response is reflected, at the output point 22, by a voltage variation whose amplitude is limited to the value of the negative voltage V-, thanks to the conduction of the second diode D2 which fulfills a clipping function
- This voltage variation constitutes a negative transition Tn of the maintenance signals SE which thus, at time t1, pass from a positive level p + to a negative level p-
- the end of application of the positive voltage V2 at time t1 brings about the end of the linear growth of the current p rincipal IL The latter begins to decrease with
- the solenoid SL is connected to the negative output V- of the second voltage source 23 directly by the second switch S2: the main current IL in the solenoid begins to increase in the second direction of circulation IL2 and continues to evolve linearly up to the value of intensity Imax-, with a slope equal to V- / L; on the other hand, the application of the negative voltage V- at the output point 22, performs the second part of the negative bearing p- of the maintenance signals SE.
- the second switch S2 is set to the "blocked" state, that is to say that it opens the circuit, the negative voltage V- is no longer applied.
- the circuit is summarized in an oscillating circuit L - c PAP; there is again an oscillatory type voltage variation on the voltage of the maintenance signals SE, a variation whose amplitude is limited this time to the value of the positive voltage V2, by the conduction of the first diode D1 which fulfills a clipping function.
- This voltage variation constitutes this time a positive transition p +, which leads the maintenance signals to pass from the negative level p- to a positive level p +
- the end of application of the negative voltage V- at time t4 leads to the end of the growth of the latter with a linear slope substantially equal to that of its growth.
- discharges occur in cells C1 to C16, discharges which are materialized in FIG. 4e by a peak IDb, representing a discharge current globally consumed by the cells in the "on" state.
- This discharge current supplied by the solenoid SL at the start of the decrease of the main current IL constitutes a part of the latter whose importance is a function of the number of cells C1 to C16 in which a discharge occurs.
- this discharge current IDb has a direction opposite to that of the discharge current IDa which occurred at time t2 after the establishment of the negative plateau p- of the maintenance signals SE
- the time interval formed between the instants t4 and t5 thus constitute a second activation phase
- the main current IL in the solenoid is canceled, and the first diode D1 stops driving, the first switch S1 is set to the "on" state Therefore from time t6, the positive voltage V2 is applied by the first switch S1 to the solenoid SL, and the main current IL in the latter continues to evaluate linearly, that is to say that it starts to grow again. up to the intensity value lmax +
- applying the positive voltage V2 to the solenoid and therefore to the output point 22 performs the second part of the positive bearing p + of the maintenance signals SE
- the voltage sources 21, 23 can supply voltage and current without problems, and can therefore be constituted with ordinary technology, and therefore less expensive than in the prior art, where the current consumed during discharges must be delivered. in about 10 times the time, about 200 nanoseconds
- the intensity value lmax + or Imax- of the main current IL in the solenoid is determined so as to meet two criteria, one of which is that it is large enough to allow the discharge current ID to be supplied through cells C1 to C16
- the discharge current to be supplied is of the order of 10 peak amps
- the other criterion for determining the intensity of the value Imax is that this value must allow a transition Tn, Tp of maintenance signals SE fast enough
- the second voltage source 23 which delivers a negative voltage V- this negative voltage V- can also be obtained by replacing the voltage source 23 with a capacitance cS called storage, of a value for example of 20 microfarads.
- a capacitance cS called storage, of a value for example of 20 microfarads.
- the currents la and Ib which in the operation described above circulate alternately, the first through the second diode D2 and the second through the second switch S2, create a negative voltage by bringing and pulling charges at the level of the capacitor cS which stores these charges Balance is obtained (mean value of V- constant) when the quantity of charges stored in one direction (la) is equal to that taken in the other direction (Ib)
- FIGS. 5a and 5b illustrate a case in which the maintenance signals have a duty cycle different from 1, and in which the negative voltage V- is obtained with a storage capacity cS
- FIG. 5a represents the main current IL in the solenoid
- FIG. 5b represents the maintenance signals SE, whose positive stages p + are longer than the negative stages p- The positive stages p + correspond to. the positive voltage V2, and the negatives p- correspond to the negative voltage V-
- FIG. 6 represents the activation signal generator 20 already shown in FIG. 3, in a version producing the current IL in the solenoid under the same conditions as those explained with reference to FIGS. 3 to 5, but making it possible to produce signals SE maintenance whose negative bearings p- are at ground potential.
- the diagram of the activation generator 20 is different from that shown in FIG. 3 in that ' a) - the end of the solenoid SL opposite the output point 22, is connected to the positive output "+" of a source voltage 25, whose negative output "-" is connected to ground potential, the voltage source 25 thus delivers a positive voltage Va, b) - the end of the second switch S2 opposite the output point 22, is connected at ground potential, c) - the end of the first switch S1 opposite to the output point 22, is connected to an armature of a second so-called storage capacity cS2, the other armature of which is connected to the ground potential If under these conditions, the "passing" state and the state are controlled
- the positive voltage V3 could also be obtained by replacing the storage capacity cS2 with a conventional voltage source
- FIG. 7 represents the maintenance signals obtained with the assembly described with reference to FIG. 6
- the maintenance signals SE consist of voltage slots, established on either side of a reference potential which is the potential of the positive voltage Va, that the negative bearings p- are at the potential of the mass, and that the positive bearings p + are at the potential of the positive voltage V3
- FIG. 8 schematically represents another embodiment of the activation signal generator 20 of the invention, making it possible to obtain an operation similar to that described with reference to FIGS. 3 and 4a to 4g, and also making it possible to provide time intervals during which the main current IL in a solenoid SL 'retains a slight value.
- the signal generator 20 shown in FIG. 8 additionally comprises a third and a fourth diodes D2, D4, as well as a third and a fourth switching elements or switches S3, S4 whose the "on" or “blocked” state are controlled by the H1 clock
- the end of the selfenoid SL 'opposite the exit point 22, is connected both to the cathode of the third diode D3 and to the anode of the fourth diode D4
- the anode of the third diode D3 is connected to one end of the third switch S3, the other end of which is connected to ground
- the cathode of the fourth diode D4 is connected to one end of the fourth switch S4, the other end of which is connected to ground
- a lower value solenoid for example 20 microHenry instead of 30 microHenry, for the same values of the applied voltages, makes it possible to reduce both the time necessary for the main current IL to pass from its intensity value maximum lmax + or Imax-, at its zero value, as well as the time it takes to increase thereafter to its maximum intensity value
- your value of the solenoid SL gives the growth of the main current IL, a duration substantially equal to half that of a positive or negative plateau p +, p- passing from a value of 30 microHenry to a value of 20 microHenry, the current growth time is reduced by about 1/3.
- Figures 9a to 9k form a timing diagram which illustrates the above-mentioned operation, making it possible to obtain time intervals during which the current of the solenoid is kept at zero.
- the first and fourth switches S1, S4 are set to the "on" state.
- the main current IL which was at zero, begins to increase according to the first direction IL1 of circulation (with a slope V2 / L 'faster than V2 / L, L' being the value of the solenoid SL ') towards its value lmax + which it will reach at time t1 when the first switch S1 goes to the "blocked" state
- the fourth diode D4 leads A instant t1 we find an operation similar to that already described for this same instant in FIGS.
- the first switch S1 is set to the "blocked" state
- the circuit is summarized with the solenoid SL 'and at the capacitance c PAP, and the voltage of the maintenance signals SE undergoes a negative transition Tn which makes it pass from a positive level p + to a negative level p- the second diode D2 begins to conduct, the negative voltage V- is applied to the cells, the main current IL in the solenoid SL 'begins to decrease
- the second and fourth diodes D2, D4 stop driving
- the third switch S3 is set to the "blocked" state, this has the effect of disconnecting the solenoid SL 'from the ground in some way, so that, even when controlling the state "on” of the second switch S2, one cannot impose a growth (in negative) of the current IL which thus preserves a zero value as long as S3 is blocked One thus obtains the beginning of a first time interval T1 with zero current
- the main current IL has reached its value Imax-
- the voltage of the maintenance signals SE undergoes a transition Tp which leads to a positive plateau p + corresponding substantially to the value V2 of positive voltage
- the first diode D1 becomes conductive
- the main current IL begins to decrease
- the invention has been described with reference to an alternating plasma panel, of the type having only two crossed electrodes to define a cell and control its operation, but the invention can be applied to all types of alternating plasma panels , and it can also be applied to other types of image viewing screens as soon as the activation of their cells requires a current of impulse nature, and these screens include a capacity such as the overall capacity c PAP presented by a plasma panel
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- Theoretical Computer Science (AREA)
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10503873A JP2000513459A (ja) | 1996-06-28 | 1997-06-24 | 画像表示スクリーンセルの駆動方法および同方法による画像表示装置 |
EP97930576A EP0907945B1 (fr) | 1996-06-28 | 1997-06-24 | Procede d'activation des cellules d'un ecran de visualisation d'image, et dispositif de visualisation d'image mettant en oeuvre le procede |
US09/202,980 US6400343B1 (en) | 1996-06-28 | 1997-06-24 | Method for activating the cells of an image displaying screen, and image displaying device using same |
DE69715202T DE69715202T2 (de) | 1996-06-28 | 1997-06-24 | Verfahren zum aktivieren von bildschirmzellen und anzeigegerät zur durchführung dieses verfahrens |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9608079A FR2750525B1 (fr) | 1996-06-28 | 1996-06-28 | Procede d'activation des cellules d'un ecran de visualisation d'image, et dispositif de visualisation d'image mettant en oeuvre le procede |
FR96/08079 | 1996-06-28 |
Publications (1)
Publication Number | Publication Date |
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WO1998000826A1 true WO1998000826A1 (fr) | 1998-01-08 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/FR1997/001123 WO1998000826A1 (fr) | 1996-06-28 | 1997-06-24 | Procede d'activation des cellules d'un ecran de visualisation d'image, et dispositif de visualisation d'image mettant en oeuvre le procede |
Country Status (6)
Country | Link |
---|---|
US (1) | US6400343B1 (fr) |
EP (1) | EP0907945B1 (fr) |
JP (1) | JP2000513459A (fr) |
DE (1) | DE69715202T2 (fr) |
FR (1) | FR2750525B1 (fr) |
WO (1) | WO1998000826A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2812963B1 (fr) * | 2000-08-11 | 2003-07-25 | St Microelectronics Sa | Procede et circuit de commande de cellules d'un ecran a plasma |
US7138994B2 (en) * | 2000-11-09 | 2006-11-21 | Lg Electronics Inc. | Energy recovering circuit with boosting voltage-up and energy efficient method using the same |
US6917351B1 (en) * | 2001-02-06 | 2005-07-12 | Imaging Systems Technology | Energy recovery in plasma display panel |
US6963174B2 (en) * | 2001-08-06 | 2005-11-08 | Samsung Sdi Co., Ltd. | Apparatus and method for driving a plasma display panel |
FR2860634A1 (fr) * | 2003-10-01 | 2005-04-08 | Thomson Plasma | Dispositif de commande d'un panneau d'affichage au plasma |
KR100708692B1 (ko) | 2005-06-14 | 2007-04-18 | 삼성에스디아이 주식회사 | 디스플레이 패널의 구동장치 |
JP2007122981A (ja) * | 2005-10-26 | 2007-05-17 | Matsushita Electric Works Ltd | 点灯装置及び照明装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5438290A (en) * | 1992-06-09 | 1995-08-01 | Nec Corporation | Low power driver circuit for an AC plasma display panel |
EP0704834A1 (fr) * | 1994-09-28 | 1996-04-03 | Nec Corporation | Circuit d'entraînement pour dispositif d'affichage à plasma du type mémoire |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5081400A (en) | 1986-09-25 | 1992-01-14 | The Board Of Trustees Of The University Of Illinois | Power efficient sustain drivers and address drivers for plasma panel |
KR100222203B1 (ko) * | 1997-03-17 | 1999-10-01 | 구자홍 | AC 플라즈마 디스플레이 패널을 위한 에너지 리커버리(recovery) 서스테인 회로 |
JP3897896B2 (ja) * | 1997-07-16 | 2007-03-28 | 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装置 |
-
1996
- 1996-06-28 FR FR9608079A patent/FR2750525B1/fr not_active Expired - Fee Related
-
1997
- 1997-06-24 EP EP97930576A patent/EP0907945B1/fr not_active Expired - Lifetime
- 1997-06-24 US US09/202,980 patent/US6400343B1/en not_active Expired - Fee Related
- 1997-06-24 WO PCT/FR1997/001123 patent/WO1998000826A1/fr active IP Right Grant
- 1997-06-24 DE DE69715202T patent/DE69715202T2/de not_active Expired - Fee Related
- 1997-06-24 JP JP10503873A patent/JP2000513459A/ja not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5438290A (en) * | 1992-06-09 | 1995-08-01 | Nec Corporation | Low power driver circuit for an AC plasma display panel |
EP0704834A1 (fr) * | 1994-09-28 | 1996-04-03 | Nec Corporation | Circuit d'entraînement pour dispositif d'affichage à plasma du type mémoire |
Also Published As
Publication number | Publication date |
---|---|
DE69715202T2 (de) | 2003-08-07 |
DE69715202D1 (de) | 2002-10-10 |
JP2000513459A (ja) | 2000-10-10 |
US6400343B1 (en) | 2002-06-04 |
FR2750525A1 (fr) | 1998-01-02 |
EP0907945B1 (fr) | 2002-09-04 |
FR2750525B1 (fr) | 1998-09-18 |
EP0907945A1 (fr) | 1999-04-14 |
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