EP1697919B1 - Bildanzeigeschirm - Google Patents

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Publication number
EP1697919B1
EP1697919B1 EP04805608A EP04805608A EP1697919B1 EP 1697919 B1 EP1697919 B1 EP 1697919B1 EP 04805608 A EP04805608 A EP 04805608A EP 04805608 A EP04805608 A EP 04805608A EP 1697919 B1 EP1697919 B1 EP 1697919B1
Authority
EP
European Patent Office
Prior art keywords
screen
during
addressing
modulator
bias voltage
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 - Fee Related
Application number
EP04805608A
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English (en)
French (fr)
Other versions
EP1697919A1 (de
Inventor
Philippe Le Roy
Christophe Prat
Fabien Ammardji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THOMSON LICENSING
Original Assignee
Thomson Licensing SAS
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Filing date
Publication date
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of EP1697919A1 publication Critical patent/EP1697919A1/de
Application granted granted Critical
Publication of EP1697919B1 publication Critical patent/EP1697919B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G09G3/30—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
    • G09G3/22—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
    • G09G3/32—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 semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • 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
    • G09G3/32—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 semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0417—Special arrangements specific to the use of low carrier mobility technology
    • 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
    • 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
    • G09G2310/0254—Control of polarity reversal in general, other than for liquid crystal displays
    • G09G2310/0256—Control of polarity reversal in general, other than for liquid crystal displays with the purpose of reversing the voltage across a light emitting or modulating element within a pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • 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
    • G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
    • G09G3/2081—Display of intermediate tones by a combination of two or more gradation control methods with combination of amplitude modulation and time modulation

Definitions

  • the invention relates to an image display screen.
  • the invention relates to a display screen based on organic electroluminescent materials, active matrix manufactured from amorphous silicon.
  • amorphous hydrogenated silicon thin film transistors have advantages over polycrystalline silicon transistors for the design of such screens because they are easier to manufacture and they exhibit uniformity of luminance over relatively large samples.
  • the trigger threshold voltage of the amorphous silicon transistors drifts over time when a voltage is applied. between their gate and their source.
  • the drift of the trigger threshold voltage of a transistor over time results in a modification of the current supplying the organic light emitting component to which it is connected and forming a pixel of the screen.
  • the luminance of these components is directly proportional to the current flowing through them.
  • the drift of the trigger threshold voltage of the transistors causes marking phenomena appearing on the screen after a certain display period.
  • a screen comprising control means able to maintain a constant voltage between the gate and the source of the amorphous silicon transistors of the active matrix of the screen to compensate for the drifts of their trigger threshold voltage.
  • a display screen comprising a control system capable of applying to the current modulator gate of the transmitters, a bias voltage having a polarity opposite to the polarity of the addressing voltage.
  • the luminance of this screen is low because the periods of application of this inverse polarization encroach on the time available for the display in each frame.
  • the object of the invention is to provide an alternating screen that has sufficient luminance and small variations thereof over time.
  • the subject of the invention is a display screen of the aforementioned type, characterized in that the duration of application of the polarization voltage having a polarization in inverse of the polarization of the addressing voltage is greater than the duration of an image frame.
  • the figure 1 schematically represents a display screen 2 based on organic electroluminescent materials, active matrix, according to the invention.
  • This screen 2 comprises an active matrix 4 as well as control means 6 thereof.
  • the active matrix 4 comprises light emitters 8, addressing circuits 10, column addressing electrodes 12, row selection electrodes 14, column driving units 16 and line driving units 18 .
  • the light emitters 8 of the display screen are organic electroluminescent diodes. They are able to be powered by a power generator V dd connected to their anode. They are each connected to an addressing circuit.
  • the addressing circuits 10 and the emitters 8 are distributed along lines and columns and form a network.
  • the addressing circuits 10, arranged in lines, are connected to the electrodes 14 for selecting lines.
  • the addressing circuits 10, arranged in columns, are connected to the column addressing electrodes 12.
  • the selection electrodes 14 are connected to the line driving units 18.
  • the addressing electrodes 12 are connected to the column driving units 16.
  • An example of an addressing circuit 10 according to the invention is represented on the figure 2 . It comprises a current modulator 20, a load capacitance 22 and a selection switch 24.
  • the current modulator 20 and the selector switch 24 are n-type Thin Film Transistors. Such components comprise three electrodes: a drain electrode, a source electrode and a gate electrode. A current is able to flow between the drain electrode and the source electrode of the transistor when a voltage greater than its trigger threshold voltage V th is applied between its gate electrode and its source electrode.
  • p-type transistors could also be used for carrying out the invention.
  • the drain of the modulator 20 is connected to the cathode of the emitter 8.
  • the source of the modulator 20 is connected to a ground electrode.
  • the gate of the modulator 20 is connected to a terminal of the load capacitor 22, the other terminal of which is connected to a ground electrode.
  • the gate of the modulator 20 is also connected to the source of the selection switch 24.
  • the drain of the switch 24 is connected to the column addressing electrode 12.
  • the gate of the switch 24 is connected to the electrode 14 for selecting lines.
  • the means 6 for controlling the addressing of the transmitters are represented on the figure 1 . They comprise a control system 26, a data bus 28, a gray scale voltage reference system 30, a transmission line 32 for a selection signal and a transmission line 34 for a synchronization signal. .
  • the control system 26 is able to control the successive addressing of each pixel of the screen for the constitution of image frames succeeding one another at a given scanning frequency, called the display frequency. It comprises addressing control means 36 and scanning control means 38.
  • the addressing control means 36 are connected to the column control units 16 by the data bus 28 to address addressing instructions to the column drive units 16.
  • the addressing instructions include digital data representative of image data during a screen operation mode called on-screen display mode and include polarization data during another operating mode of the called screen. Standby mode of the screen.
  • the column control units 16 comprise means for receiving bus addressing instructions 28 and are able to convert them to analog data using the reference system 32 and to apply a voltage representative of this data to a column addressing electrode 12.
  • the column driving units 16 are adapted to apply to the electrodes 12 polarization voltages having a polarity of sign opposite to the polarity of the addressing voltages, representative of image data, applied during the display mode.
  • the application of an address voltage representative of an image data to the gate of an amorphous silicon modulation transistor causes a drift of the trigger threshold voltages.
  • the application of a bias voltage causes a drift of its trigger threshold voltage in a reverse direction. More specifically, the trigger threshold voltage of the transistors increases during the display mode and decreases during the standby mode of the screen.
  • the value of the bias voltage applied by the control units is constant and predefined. It is for example between -8 volts and -25 volts.
  • the screen saver mode has a constant and predefined duration greater than one frame of image.
  • the duration of the screen saver mode is between 1 and 2 hours.
  • the screen saver mode is set automatically after the user presses an end of image display button at the scan rate.
  • control system 26 includes means for turning off the power of the transmitters during the standby mode of the screen.
  • means for turning off the power of the transmitters during the standby mode of the screen comprise for example a switch 37 and a line 39 for controlling the opening and closing of this switch.
  • the addressing control means 36 are connected to the control units 18 by the line 32, to transmit a selection signal to them.
  • the row control units 18 are able to apply a selection voltage successively to each selection electrode 14 to which the control unit 18 is connected to select an addressing circuit 10 of a transmitter of a column already addressed by a column addressing electrode 12.
  • the control units 16 and 18 are able to successively address all the transmitters of the screen.
  • the addressing control means 36 are connected to the column control units 16 via the line 34 to transmit a synchronization signal to the column control units 16 via the line 34. This signal makes it possible to synchronize the addressing of a column. column of transmitters to the selection of a line of transmitters.
  • the scan control means 38 are connected to the addressing control means. They include for example a clock that defines the period of the selection and synchronization pulses and thus controls the scanning speed of the screen.
  • the scan control means 38 is adapted to decrease the scanning frequency of the screen lines during the screen standby mode at a frequency lower than the scan frequency of the lines during the display of the images. Preferably, this frequency is then between 5 and 20 kilohertz.
  • the column driving unit 16 applies an address voltage representative of an image data to the addressing electrode 12.
  • the control unit 18 The switch 24 of the addressing circuit 10, at the intersection of the addressing electrode 12 and the selection electrode 14, is released.
  • the addressing voltage is applied to the gate of the modulator 20 and to a terminal of the charging capacitor 22.
  • the application of an addressing voltage to the gate of the modulator 20 generates the appearance of a drain current passing through the modulator 20 from its drain to its source. This current supplies the transmitter 8.
  • the potential stored at the gate of the modulator 20 by the load capacitance 22 makes it possible to maintain the current flowing through the transmitter 8 until the end of the image frame.
  • the column driving unit 16 applies to the addressing electrodes 12 a bias voltage.
  • the control unit 18 of lines applies a selection voltage to the electrode 14
  • the bias voltage applied to the electrode 12 is transmitted to the gate of the modulator 20 and to a terminal of the charging capacitance 22.
  • the charging capacitance 22 stores charges representative of the bias voltage at the electrode of the modulator 20.
  • the trigger threshold voltage of the modulator 20 which had drifted when the screen was previously in image display mode, then drifts in the opposite direction during the screen standby mode: it thus advantageously leads to compensation drifts that allows, in the long run, to maintain a level almost constant trigger threshold of all modulators of the screen.
  • the figure 3 represents a second embodiment of the invention.
  • control system 26 also comprises calculation means 40 able to evaluate the drift of the trigger threshold voltages of each modulator 24 of the screen.
  • These calculation means 40 comprise receiving means and summing means.
  • the receiving means is capable of collecting the value of each addressing voltage representative of an image data applied to the gate of each modulator 20 of the addressing circuits of the screen during the duration of the display mode.
  • the summing means are suitable for calculating the value of the drift of a modulator by adding, on the one hand, the values of the addressing voltages applied to a modulator 20 at each image frame and, on the other hand, of the total duration the display mode of the screen.
  • These calculation means 40 are adapted to search in a database for the value and the duration of the bias voltage to be applied to each modulator to compensate for the drift of its tripping threshold so that it regains its initial value.
  • the calculation means 40 are able to send to the addressing control means 36 the value and duration of the bias voltage to be applied to each modulator.
  • the addressing control means 36 are able to generate an addressing set and a selection and synchronization signal specific to each modulator.
  • the column control units 16 are able to apply to each modulator 20 of the screen a bias voltage of a value determined by the calculation means 40.
  • the row control units 16 are able to apply to each switch a selection voltage for discharging the charge capacity 22 after a period determined by the calculation means 40.
  • the screen marking phenomena are blurred using the invention.
  • the display screen according to the invention consumes little electrical energy.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Claims (7)

  1. Bildanzeigeschirm zum Anzeigen von Teilbildern mit:
    - Lichtemittern (8), die entlang Emitterzeilen und Emitterspalten zur Bildung eines Ermitternetzes verteilt sind, wobei die Emitter des Netzes dazu geeignet sind, während eines Anzeigemodus am Bildschirm mit Strom versorgt zu werden,
    - einer Adressierschaltung eines Emitters, die jedem Emitter (8) des Netzes zugeordnet ist, wobei die Schaltung folgendes umfasst:
    - einen Strommodulator (20), der dazu geeignet ist, den Emitter (8) während des Anzeigemodus mit Strom zu versorgen, wobei der Modulator (20) eine Gate-Elektrode und zwei Stromdurchflusselektroden umfasst:
    - eine Ladekapazität (22), die dazu geeignet ist, bei jedem Teilbild eine Adressierspannung zu speichern, die für ein Bildelement während des Anzeigemodus repräsentativ ist, wobei die Spannung an die Gate-Elektrode des Strommodulators angelegt wird,
    - ein Steuersystem (26), das dazu geeignet ist, eine Polarisationsspannung an die Gate-Elektrode des Strommodulators (20) während eines Bereitschaftsmodus des Bildschirms anzulegen, wobei die Polarisationsspannung eine Polarisation umgekehrt zur Polarisation der Adressierspannung, die an die Ladekapazität (22) während des Anzeigemodus am Bildschirm angelegt wird, aufweist
    - dadurch gekennzeichnet, dass die Anlegungsdauer der Polarisationsspannung, die eine Polarisation umgekehrt zur Polarisation der Adressierspannung hat, die Dauer eines Teilbildes übersteigt.
  2. Bildanzeigeschirm nach Anspruch 1 dadurch gekennzeichnet, dass das Steuersystem (26) Adressiersteuermittel (12,16,28, 34, 36) umfasst, die dazu geeignet sind, einerseits die Adressierspannung an die Gate-Elektrode des Strommodulators (20) während des Anzeigemodus des Bildschirms und andererseits die Polarisationsspannung während des Bereitschaftsmodus des Bildschirms anzulegen.
  3. Bildanzeigeschirm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuersystems (26) Abtaststeuermittel (36, 38) für Bildschirmzeilen umfasst, die dazu eingerichtet sind, die Abtastsequenz der Zeilen des Bildschirms während des Bereitschaftsmodus des Bildschirms auf eine Frequenz herabzusetzen, die kleiner ist als die Abtastfrequenz der Zeilen während des Anzeigemodus.
  4. Bildanzeigeschirm nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Steuersystem (26) Berechnungsmittel (40) zur Berechnung der Summe der Spannungen, die bei jedem Teilbild an die Gate-Elektrode jedes Strommodulators (20) während des Anzeigemodus am Bildschirm angelegt werden, umfasst, wobei die Berechnungsmittel (40) dazu geeignet sind, die Charakteristik einer Polarisationsspannung für ein Anlegen an jeden Strommodulator entsprechend der Summe der an diesen Modulator (20) angelegten Spannungen zu bestimmen, und dadurch, dass das Steuersystem (26) dazu geeignet ist, an jeden Modulator (20) die durch die Berechnungsmittel (40) bestimmte spezifische Polarisationsspannung während des Bereitschaftsmodus des Bildschirms anzulegen.
  5. Bildanzeigeschirm nach Anspruch 4, dadurch gekennzeichnet, dass die von den Berechnungsmitteln (40) bestimmte Charakteristik der Polarisationsspannung die Anlegungsdauer der Polarisationsspannung umfasst.
  6. Bildanzeigeschirm nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die von den Berechnungsmitteln (40) bestimmte Charakteristik der Polarisationsspannung den Wert der Polarisationsspannung umfasst.
  7. Bildanzeigeschirm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er Mittel zur Leistungsversorgung (Vdd) der Emitter umfasst und dass das Steuersystems (26) Mittel (37, 39) zum Abtrennen der Versorgung der Emitter (8) während des Bereitschaftsmodus des Bildschirms aufweist.
EP04805608A 2003-12-23 2004-12-01 Bildanzeigeschirm Expired - Fee Related EP1697919B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0315296 2003-12-23
PCT/FR2004/003088 WO2005071648A1 (fr) 2003-12-23 2004-12-01 Ecran d'affichage d'images

Publications (2)

Publication Number Publication Date
EP1697919A1 EP1697919A1 (de) 2006-09-06
EP1697919B1 true EP1697919B1 (de) 2009-09-02

Family

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Application Number Title Priority Date Filing Date
EP04805608A Expired - Fee Related EP1697919B1 (de) 2003-12-23 2004-12-01 Bildanzeigeschirm

Country Status (7)

Country Link
US (1) US8325117B2 (de)
EP (1) EP1697919B1 (de)
JP (1) JP4907356B2 (de)
KR (1) KR101178813B1 (de)
DE (1) DE602004022984D1 (de)
TW (1) TWI368200B (de)
WO (1) WO2005071648A1 (de)

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Publication number Priority date Publication date Assignee Title
FR2895130A1 (fr) 2005-12-20 2007-06-22 Thomson Licensing Sas Procede de pilotage d'un panneau d'affichage par couplage capacitif
FR2895131A1 (fr) 2005-12-20 2007-06-22 Thomson Licensing Sas Panneau d'affichage et procede de pilotage avec couplage capacitif transitoire
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JP2007515687A (ja) 2007-06-14
JP4907356B2 (ja) 2012-03-28
EP1697919A1 (de) 2006-09-06
US8325117B2 (en) 2012-12-04
US20080093994A1 (en) 2008-04-24
KR101178813B1 (ko) 2012-08-31
WO2005071648A1 (fr) 2005-08-04

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