EP0972282B1 - Dispositif de commande d'une cellule d'un ecran matriciel - Google Patents
Dispositif de commande d'une cellule d'un ecran matriciel Download PDFInfo
- Publication number
- EP0972282B1 EP0972282B1 EP98949077A EP98949077A EP0972282B1 EP 0972282 B1 EP0972282 B1 EP 0972282B1 EP 98949077 A EP98949077 A EP 98949077A EP 98949077 A EP98949077 A EP 98949077A EP 0972282 B1 EP0972282 B1 EP 0972282B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- transistor
- elementary
- control circuit
- column
- 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.)
- Expired - Lifetime
Links
- 239000011159 matrix material Substances 0.000 title claims description 22
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 6
- 230000001934 delay Effects 0.000 claims description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 description 20
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000013256 coordination polymer Substances 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- 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
- G09G3/2011—Display of intermediate tones by amplitude modulation
-
- 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
- G09G3/30—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 electroluminescent panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
-
- 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
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0259—Details of the generation of driving signals with use of an analog or digital ramp generator in the column driver or in the pixel circuit
-
- 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
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
-
- 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
-
- 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
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
Definitions
- the present invention relates to a control device matrix, more particularly a matrix control device used in a flat screen such as a matrix type liquid crystal display active or other types of flat screen.
- a matrix control device is used, for example, to control the cells of a flat screen such than liquid crystal cells.
- a screen to liquid crystals of the active matrix type also known by the abbreviation AM-LCD.
- Such an active matrix type liquid crystal screen is shown in Figure 1.
- the screen consists of a certain number of electro-optical cells each formed by an electrode and a counter-electrode enclosing the liquid crystal. These cells are referenced XL in said figure.
- the electro-optical cells are arranged in rows and columns, and each controlled by a switching circuit forming part of a control device matrix type.
- the circuit switching is carried out by a transistor T of which one of the electrodes is connected to a column Cj and the other electrode of which is connected to the XL electro-optical cell.
- the gate of transistor T is connected to one of the lines Li of the control device.
- the XL electro-optical cell is associated with a capacity of CP storage mounted in parallel on the capacity formed by the cell electro-optics at the output of transistor T.
- the assembly formed by the transistor T and the capacity CP form an elementary control circuit referenced Pij in Figure 1.
- each of the lines of selection Li is connected to a control circuit 2 or "line driver" which successively applies a pulse of control with a voltage typically varying between - 10 and + 20 volts.
- each of the columns Cj or rows of data is connected to a column control circuit 3 or "column driver" which sends on the columns Cj an analog signal corresponding to the video signal representing more particularly a gray scale whose voltage typically varies between + and - 5 volts.
- the control of a XL electro-optical cell is carried out as follows.
- the transistor switching T becomes conducting. Therefore, the analog voltage applied to column Cj is transmitted across the electrodes of the XL electro-optical cell which displays a gray level corresponding to the data signal.
- a matrix control device of this type has switching transistors which are most often constituted by TFT thin film transistors for "Thin Film Transistor ".
- Such a device is generally made of amorphous silicon.
- the lines and columns control circuits 2,3 can be integrated on the substrate plate on which the flat screen is made or be done independently. When integrated on the plate substrate, they are also made using amorphous silicon.
- Another problem encountered with this structure when it is made with polycrystalline silicon or silicon transistors monocrystalline, relates to the leakage current of the switching transistor T in the blocked state which tends to discharge the elementary points or cells electro-optics XL.
- the object of the present invention is to remedy the drawbacks cited above by proposing a matrix control device having a new structure for the control circuit elementary of each elementary point, this structure being particularly well suited to the use of polycrystalline silicon or monocrystalline for the production of transistors or other semiconductor circuits.
- the present invention therefore relates to a device for matrix control comprising a set of control circuits arranged in rows and columns and each commanding an elementary point, the state of each elementary point being a function of first and second control signals applied to the control circuit respectively by rows and columns, characterized in that each control circuit is an electrical circuit provided with two independent inputs supplied by the first and the second signal, and with an output which generates the control signal for the elementary point (XL). impedance of this circuit between its output and that of one of its inputs which carries the first signal becomes weak following application of an adequate voltage pulse on this first signal, and this same impedance becomes very high following the application of an adequate voltage on the second signal.
- the first signal is a signal which, in a first step, activates all line control circuits corresponding by making them passers-by then applying a ramp of voltage which is transmitted from the control circuit to the point corresponding elementary.
- the first signal consists of a ramp-shaped signal preceded by a negative precharge pulse.
- the instant of triggering of the ramp-shaped signal is adjusted from line to line to compensate for propagation delays on the columns.
- the second signal is a switching signal of numerical type determining the duration during which the circuits of activated commands remain passers-by.
- the second switching signal consists of PWM type pulses for "Pulse Width Modulation" in language English.
- the moment of triggering of the pulses is adjusted from column to column to compensate for delays on the lines.
- the control circuit consists of a first transistor connecting the elementary point to the corresponding line receiving the first signal and a second transistor of which a first electrode is connected to the gate of the first transistor, the gate of which is connected to the corresponding column receiving the second signal and the second of which electrode is connected to a reference potential.
- the elementary control circuit further comprises a capacitance connected between the gate of the first transistor and the line corresponding.
- the second electrode of the second transistor is connected to the previous line.
- the circuits are made using silicon Polycrystalline.
- FIG 2 there is shown a control device matrix according to the present invention associated with a circuit control lines 20 and a column control circuit 30, said circuits which may or may not be integrated on the same substrate as the matrix control device.
- the elementary control circuit referenced P'ij has been modified to limit power consumption and thus allowing production in polycrystalline silicon.
- the elementary control circuit P'ij arranged in lines and in columns commands an elementary point made up, in the mode of realization represented, by an electro-optical cell XL, more particularly a liquid crystal cell.
- an electro-optical cell XL more particularly a liquid crystal cell.
- a CP storage capacity is mounted in parallel, said cell itself playing the role of a capacitance and its optical properties being modified according to the value of the electric field which crosses liquid crystal.
- the control circuit P'ij consists of essentially by a switching device MN2 consisting of preferably by a thin film transistor or TFT.
- An electrode of the transistor MN2 is connected to an electrode of the electro-optical cell XL while its other electrode is connected to a line L'i.
- the gate of transistor MN2 is connected to an electrode of a second transistor MN1, the other electrode of which is connected to ground in the embodiment shown and the grid of which is connected to a column C'j.
- a capacity referenced CB is connected between the gate of the switching transistor MN2 and the line L'i.
- the connection point between the capacitor CB and the gate of the transistor MN2 is referenced A while the connection point between the electrode of the transistor MN2 and the electrode of the electro-optical cell XL is referenced B.
- the lines L'i are connected to a line control circuit 20 which provides on the lines a data signal constituted by a signal which, initially, activates all the elementary circuits of command of the corresponding line by making them passers-by, then then apply a voltage ramp which is transmitted at the output of the elementary control circuit at the XL cell.
- the whole columns C'j is connected to a column control circuit 30 which provides, on each column, a second signal consisting of a signal digital type switching, more particularly pulses of PWM type determining the duration during which the P'ij command activated remain passers-by.
- the signal applied to the lines L'i, L'i + 1 is consisting of a negative pulse enabling all the elementary control circuits of a line followed by a ramp including the amplitude typically varies between - 5 volts and + 10 volts preferably.
- the duration T of the signal L'i corresponds to a line time.
- the same signal is applied but offset by a time T as shown on figure 3.
- a signal of switching constituted by PWM type pulses to modulate the pulses in width the signal having levels included typically between 0 and 2 volts, in the case of a silicon realization polycrystalline or monocrystalline silicon.
- the control circuit elementary consisting mainly of the two transistors MN1 and MN2 works as follows.
- the second electrode of transistor MN1 is at a reference potential at know either to ground in the embodiment shown or to potential of the previous line which is itself at a voltage of reference, because it is not addressed.
- the transistor MN1 becomes conducting and point A, namely the gate of transistor MN2 goes to the reference potential.
- the source gate voltage Vgs of transistor MN2 is zero and the current "off" of transistor MN2 is minimum.
- the electro-optical cell XL does not not discharge.
- the new elementary control circuit above allows therefore to display gray levels corresponding to the duration during which the ramp is applied at point A.
- the voltage of each elementary cell P'ij can therefore reach any value in the range of variation of the ramp provided by the first signal.
- the polarity of each cell can therefore be chosen independently of that of its neighbors provided that the counter electrode voltage is adjusted to a value close to the half of the maximum voltage reached by the first signal.
- the control circuit described above makes it possible to effectively reduce consumption. Indeed, the consumption is given by 1 ⁇ 2 f CV 2 , f being the line frequency, V the amplitude of the applied signal and C the capacities.
- the table below shows the difference in consumption between the control device in FIG. 1 and in FIG. 2 for a liquid crystal screen comprising 600 rows and 2400 columns on a diagonal of the order of 30 cm.
- COLUMNS APPLIED SIGNALS LINE FREQUENCY POWER prior art analog +/- 5 V 30 KHz ⁇ 1 ⁇ 2 W invention
- PWM 0 - 1 V 30 KHz 20 mW
- LINE FREQUENCY POWER prior art digital 40 V 30 KHz 1 line at a time ⁇ 10 mW invention analog data ramp: 15 V 30 KHz 1 line at a time ⁇ 2 mW
- the MN2 transistors operate with a gate-source voltage Vgs controlled, which gives a lower "off" current.
- FIG. 4 presents a variant of the invention where the outlet of the elementary control circuits P'ij identical to those represented on Figure 3 is no longer connected to a liquid crystal element, but to the gate of a transistor MN3 whose role is to deliver, to a material electroluminescent, an excitation current controlled by this voltage.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Description
- la figure 1 déjà décrite est une représentation schématique d'un dispositif de commande matriciel utilisé dans le cas d'un écran à cristaux liquides à matrice active associé à des circuits de commande lignes et colonnes conformément à l'art antérieur ;
- la figure 2 est une représentation schématique d'un dispositif de commande matriciel conforme à la présente invention dans le cas où le point élémentaire est constitué par une cellule à cristaux liquides, ce dispositif étant associé à des circuits de commande lignes et colonnes,
- la figure 3 représente la forme des différents signaux appliqués respectivement sur les lignes, les colonnes, au point A, au point B et la tension grille source du transistor MN2 dans le cas du circuit de commande élémentaire de la figure 2, et,
- la figure 4 est une représentation schématique d'un dispositif de commande matriciel conforme à la présente invention dans le cas où le point élémentaire est constitué par un matériau électroluminescent, ce dispositif étant associé à des circuits de commande lignes et colonnes.
| COLONNES | SIGNAUX APPLIQUES | FREQUENCE LIGNE | PUISSANCE |
| art antérieur | analogique: +/- 5 V | 30 KHz | ≈ ½ W |
| invention | PWM: 0 - 1 V | 30 KHz | 20 mW |
| LIGNES | SIGNAUX APPLIQUES | FREQUENCE LIGNE | PUISSANCE |
| art antérieur | numérique: 40 V | 30 KHz 1 ligne à la fois | ≈ 10 mW |
| invention | analogique rampe de données: 15 V | 30 KHz 1 ligne à la fois | ≈ 2 mW |
Claims (13)
- Dispositif de commande matriciel comportant un ensemble de circuits de commande (P'ij) disposés en lignes et en colonnes et commandant chacun un point élémentaire (XL), l'état de chaque point élémentaire étant fonction de premier et second signaux (L'i, C'j) de commande appliqués sur le circuit de commande (P'ij) respectivement par les lignes (L'i) et les colonnes (C'j), caractérisé en ce que chaque circuit de commande (P'ij) est un circuit électrique pourvu de deux entrées indépendantes alimentées par le premier et le second signal, et d'une sortie qui génère le signal de commande du point élémentaire (XL), l'impédance de ce circuit électrique entre la sortie et celle d'une de ses entrées qui véhicule le premier signal devenant faible suite à l'application d'une impulsion de tension adéquate sur ce premier signal (L'i), et en ce que cette même impédance devient très élevée suite à l'application d'une tension adéquate sur le deuxième signal.
- Dispositif selon la revendication 1, caractérisé en ce que le premier signal (L'i) est un signal qui, dans un premier temps, permet d'activer tous les circuits de commande (P'ij) de la ligne (L'i) correspondante en les rendant passants puis d'appliquer une rampe de tension qui est transmise en sortie du circuit de commande (P'ij) au point élémentaire correspondant.
- Dispositif selon la revendication 2, caractérisé en ce que le premier signal (L'i) est constitué par un signal en forme de rampe précédé par une impulsion négative de précharge.
- Dispositif selon l'une quelconque des revendications 2 et 3, caractérisé en ce que le déclenchement du signal en forme de rampe est ajusté de ligne en ligne de manière à compenser les délais de propagation sur les colonnes (C'j).
- Dispositif selon la revendication 1, caractérisé en ce que le second signal (C'j) est un signal de commutation de type numérique déterminant la durée pendant laquelle les circuits de commande (P'ij) activés restent passants.
- Dispositif selon la revendication 5, caractérisé en ce que le second signal (C'j) de commutation est constitué par des impulsions de type PWM (Pulse Width Modulation).
- Dispositif selon l'une quelconque des revendications 5 et 6, caractérisé en ce que le déclenchement des impulsions est ajusté de colonne en colonne pour compenser les délais sur les lignes (L'i).
- Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le circuit de commande (P'ij) est constitué par un premier transistor (MN2) connectant le point élémentaire (XL) à la ligne (L'i) correspondante recevant le premier signal et un second transistor (MN1) dont une première électrode est connectée à la grille du premier transistor, dont la grille est reliée à la colonne (C'j) correspondante recevant le second signal et dont la deuxième électrode est connectée à un potentiel de référence.
- Dispositif selon la revendication 8, caractérisé en ce qu'il comporte de plus une capacité (CB) connectée entre la grille du premier transistor (MN2) et la ligne (L'i) correspondante.
- Dispositif selon la revendication 8, caractérisé en ce que la deuxième électrode du second transistor (MN1) est connectée à la ligne précédente (L'i-1 ).
- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les circuits sont réalisés en utilisant du silicium polycristallin, du silicium amorphe, ou du silicium monocristallin.
- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les points élémentaires sont des cellules électro-optiques.
- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la sortie des points élémentaires P'ij servent à moduler le courant d'excitation d'un matériau électroluminescent.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9715863 | 1997-12-15 | ||
| FR9715863A FR2772501B1 (fr) | 1997-12-15 | 1997-12-15 | Dispositif de commande matriciel |
| PCT/FR1998/002236 WO1999031650A1 (fr) | 1997-12-15 | 1998-10-19 | Dispositif de commande d'une cellule d'un ecran matriciel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0972282A1 EP0972282A1 (fr) | 2000-01-19 |
| EP0972282B1 true EP0972282B1 (fr) | 2004-12-15 |
Family
ID=9514608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98949077A Expired - Lifetime EP0972282B1 (fr) | 1997-12-15 | 1998-10-19 | Dispositif de commande d'une cellule d'un ecran matriciel |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6844874B2 (fr) |
| EP (1) | EP0972282B1 (fr) |
| JP (1) | JP2001512588A (fr) |
| KR (1) | KR20000070943A (fr) |
| DE (1) | DE69828158T2 (fr) |
| FR (1) | FR2772501B1 (fr) |
| WO (1) | WO1999031650A1 (fr) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3475938B2 (ja) * | 2000-05-26 | 2003-12-10 | セイコーエプソン株式会社 | 電気光学装置の駆動方法、電気光学装置の駆動回路、電気光学装置および電子機器 |
| JP3725458B2 (ja) * | 2001-09-25 | 2005-12-14 | シャープ株式会社 | アクティブマトリクス表示パネル、およびそれを備えた画像表示装置 |
| EP1559089A1 (fr) | 2002-11-04 | 2005-08-03 | iFire Technology Corp. | Procede et appareil permettant une correction gamma de l'echelle des gris pour ecrans electroluminescents |
| KR20050088240A (ko) * | 2002-12-30 | 2005-09-02 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 동시 라인 어드레싱 디스플레이 및 구동 방법 |
| US20050044186A1 (en) * | 2003-06-13 | 2005-02-24 | Petrisor Gregory C. | Remote interface optical network |
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| TWI429327B (zh) * | 2005-06-30 | 2014-03-01 | Semiconductor Energy Lab | 半導體裝置、顯示裝置、及電子設備 |
| TWI424408B (zh) * | 2005-08-12 | 2014-01-21 | 半導體能源研究所股份有限公司 | 半導體裝置,和安裝有該半導體裝置的顯示裝置和電子裝置 |
| CN101268640B (zh) * | 2005-09-19 | 2015-05-20 | 路美克斯公司 | 光纤到座的飞行中娱乐系统 |
| WO2008033870A2 (fr) * | 2006-09-11 | 2008-03-20 | Lumexis Corporation | Système de distribution par fibres de type fibre jusqu'au siège |
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| JP5499638B2 (ja) * | 2009-10-30 | 2014-05-21 | セイコーエプソン株式会社 | 電気泳動表示装置とその駆動方法、及び電子機器 |
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| FR2489994B1 (fr) * | 1980-09-09 | 1987-09-11 | Thomson Csf | Procede d'elaboration des signaux de commande d'un panneau a plasma de type alternatif et panneau a plasma commande par des signaux elabores selon ce procede |
| US5122676A (en) * | 1990-12-03 | 1992-06-16 | Thomson, S.A. | Variable pulse width generator including a timer vernier |
| JP2794499B2 (ja) * | 1991-03-26 | 1998-09-03 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
| JP2775040B2 (ja) * | 1991-10-29 | 1998-07-09 | 株式会社 半導体エネルギー研究所 | 電気光学表示装置およびその駆動方法 |
| DE69322279T2 (de) * | 1992-09-11 | 1999-06-24 | Kopin Corp., Taunton, Mass. | Farbfiltersystem fuer anzeigetafeln |
| JP2821347B2 (ja) * | 1993-10-12 | 1998-11-05 | 日本電気株式会社 | 電流制御型発光素子アレイ |
| FR2720185B1 (fr) * | 1994-05-17 | 1996-07-05 | Thomson Lcd | Registre à décalage utilisant des transistors M.I.S. de même polarité. |
| US5434899A (en) * | 1994-08-12 | 1995-07-18 | Thomson Consumer Electronics, S.A. | Phase clocked shift register with cross connecting between stages |
| US5684365A (en) * | 1994-12-14 | 1997-11-04 | Eastman Kodak Company | TFT-el display panel using organic electroluminescent media |
| JPH08241057A (ja) * | 1995-03-03 | 1996-09-17 | Tdk Corp | 画像表示装置 |
| US5701136A (en) * | 1995-03-06 | 1997-12-23 | Thomson Consumer Electronics S.A. | Liquid crystal display driver with threshold voltage drift compensation |
| JP3234131B2 (ja) * | 1995-06-23 | 2001-12-04 | 株式会社東芝 | 液晶表示装置 |
| FR2743662B1 (fr) * | 1996-01-11 | 1998-02-13 | Thomson Lcd | Perfectionnement aux registres a decalage utilisant des transistors mis de meme polarite |
| US5949398A (en) * | 1996-04-12 | 1999-09-07 | Thomson Multimedia S.A. | Select line driver for a display matrix with toggling backplane |
| JP3530341B2 (ja) * | 1997-05-16 | 2004-05-24 | Tdk株式会社 | 画像表示装置 |
| US6175345B1 (en) * | 1997-06-02 | 2001-01-16 | Canon Kabushiki Kaisha | Electroluminescence device, electroluminescence apparatus, and production methods thereof |
| JP4092827B2 (ja) * | 1999-01-29 | 2008-05-28 | セイコーエプソン株式会社 | 表示装置 |
-
1997
- 1997-12-15 FR FR9715863A patent/FR2772501B1/fr not_active Expired - Fee Related
-
1998
- 1998-10-19 DE DE69828158T patent/DE69828158T2/de not_active Expired - Fee Related
- 1998-10-19 JP JP53209599A patent/JP2001512588A/ja active Pending
- 1998-10-19 EP EP98949077A patent/EP0972282B1/fr not_active Expired - Lifetime
- 1998-10-19 US US09/367,146 patent/US6844874B2/en not_active Expired - Lifetime
- 1998-10-19 KR KR1019997007208A patent/KR20000070943A/ko not_active Withdrawn
- 1998-10-19 WO PCT/FR1998/002236 patent/WO1999031650A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20020130827A1 (en) | 2002-09-19 |
| DE69828158D1 (de) | 2005-01-20 |
| EP0972282A1 (fr) | 2000-01-19 |
| DE69828158T2 (de) | 2005-12-22 |
| KR20000070943A (ko) | 2000-11-25 |
| US6844874B2 (en) | 2005-01-18 |
| FR2772501B1 (fr) | 2000-01-21 |
| WO1999031650A1 (fr) | 1999-06-24 |
| JP2001512588A (ja) | 2001-08-21 |
| FR2772501A1 (fr) | 1999-06-18 |
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