EP1863005B1 - Videoanzeigevorrichtung und Betriebsverfahren dafür - Google Patents

Videoanzeigevorrichtung und Betriebsverfahren dafür Download PDF

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Publication number
EP1863005B1
EP1863005B1 EP20070108551 EP07108551A EP1863005B1 EP 1863005 B1 EP1863005 B1 EP 1863005B1 EP 20070108551 EP20070108551 EP 20070108551 EP 07108551 A EP07108551 A EP 07108551A EP 1863005 B1 EP1863005 B1 EP 1863005B1
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EP
European Patent Office
Prior art keywords
current
circuit node
light emitting
emitting elements
modulator
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Expired - Fee Related
Application number
EP20070108551
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English (en)
French (fr)
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EP1863005A3 (de
EP1863005A2 (de
Inventor
Dominique Gagnot
Philippe Le Roy
Pierrick Martin
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THOMSON LICENSING
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Thomson Licensing SAS
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Publication date
Priority claimed from EP06300542A external-priority patent/EP1863001A1/de
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Priority to EP20070108551 priority Critical patent/EP1863005B1/de
Publication of EP1863005A2 publication Critical patent/EP1863005A2/de
Publication of EP1863005A3 publication Critical patent/EP1863005A3/de
Application granted granted Critical
Publication of EP1863005B1 publication Critical patent/EP1863005B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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]
    • G09G3/3225—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] using an active matrix
    • G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference 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

Definitions

  • the present invention relates to a video display device comprising a plurality of light-emitting elements arranged in a matrix having lines and columns, and to a method for operating such a display device.
  • Display devices of this type require driver circuits for controlling the luminosity of each of its light-emitting elements.
  • one driver circuit is associated to a plurality of light-emitting elements and supplies these with operating current pulses according to a time division scheme, i.e. at a given instant, only one of the light-emitting elements associated to a given driver circuit receives from it an operating current and emits light, whereas the others receive no current and remain dark.
  • Passive matrix technology involves simple and inexpensive circuitry, but in order to achieve a reasonable overall luminosity of the display device, the intensity of the pulses supplied to the individual light-emitting elements must be high, causing problems such as premature aging of the light-emitting elements and a low reliability of the display device.
  • each light-emitting element has a current modulator associated to it, which is programmable to supply its light-emitting element with a continuous operating current, the intensity of which is updated when a new image is to be displayed.
  • EP 1 622 120 A1 discloses a display device of this type.
  • Each of the light-emitting elements of this display device has a first current modulator associated to it, for drawing a feed current of programmable intensity for the associated light-emitting element from a circuit node associated to each of the matrix columns.
  • each column has a current generator associated to it, which is controlled by video data representative of desired luminosities of the light-emitting elements of said column for supplying a first current to said circuit node, the intensity of which is representative of a total desired luminosity of all light-emitting elements of said column.
  • the first current from the current generator is distributed and supplied to the light-emitting elements of the column in proportion to their intended luminosities as defined by the video data received by the current source.
  • the luminosities of the light emitting elements When displaying a variable image such as a TV image, the luminosities of the light emitting elements must be updated continuously, element by element. Putting things simply, one might say that the luminosity of one element is updated by having the current generator outputting to said circuit node a first current proportional to the sum of the updated luminosity of said one element and the present luminosities of the other elements, and by programming the first current modulator associated to the element to be updated so that it will absorb from the circuit node that portion of the first current which is not absorbed by the first current modulators of all the other elements.
  • the current source must be able to control the first current intensity at a resolution of n*m, if n is the number of light-emitting elements in a column and m is the number of luminosity levels which these elements shall be able to display.
  • n has a value of approximately 1000 typical for a TV image and m is e.g. 256
  • the required resolution is approximately 256,000.
  • Such a resolution requires sophisticated and expensive circuitry for the current source.
  • the object of the present invention is to provide a video display device in which the required resolution of the voltage source is considerably reduced, so that simple and inexpensive circuitry may be used.
  • the display device of the invention comprises a large number n*1 of light-emitting elements such as OLEDs (Organic Light-Emitting Diodes) arranged on a substrate in a matrix of n lines and 1 columns. Since the columns are identical in design and operation, Fig. 1 illustrates just one of these columns.
  • the column comprises OLEDs 1-1, 2-2,..., 1-n serially connected to an associated current modulator 2-1, 2-2,..., 2-n.
  • the OLEDs and the current modulators are connected in parallel between a circuit node 3 and a negative supply potential V-.
  • the current modulators 2-1, 2-2, ..., 2-n may each be formed by a FET having two current electrodes, one connected to the circuit node 3 and the other to the OLED 1-1, 1-2, ... or 1-n, respectively, and a control electrode connected to first sides of a switch 4-1, 4-2, ..., 4-n and of a storage capacitor 5-1, 5-2,..., 5-n.
  • the storage capacitors have their second sides connected to ground, but they might as well be connected to said negative supply voltage V-, to a positive supply voltage V+ or to any other appropriate constant potential.
  • the switches 4-1, 4-2, 4-n have their second sides connected to an output of an operational amplifier 6, of which a non-inverting input is connected to circuit node 3 and an inverting input is connected to ground.
  • An operational amplifier 7 has its non-inverting input connected to ground, its inverting input connected to circuit node 3 and its output connected to a first side of a switch 8, a second side of which is connected to a storage capacitor 9 and to a control terminal of a current modulator 10 which may be of the same type as current modulators 2-1, 2-2, ..., 2-n.
  • Current modulator 10 has its current terminals connected to positive supply voltage V+ and to circuit node 3.
  • An exemplary current generator 11 comprises a control block 12, a transistor 13 and a resistor 14. Transistor 13 and resistor 14 are connected in series between the positive supply voltage V+ and the circuit node 3.
  • Control block 12 has an input 15 for receiving digital data representative of desired luminosities of OLEDs 1-1, 1-2, ..., 1-n, inputs 16 for detecting a voltage drop across resistor 14 and an output connected to a control electrode of transistor 13.
  • Transistor 13 may be a bipolar or MOS-FET transistor.
  • Fig. 1 For explaining the operation of the circuitry of Fig. 1 , let us assume that the display device is just starting operation, and that initially all current modulators 2-1, 2-2, ..., 2-n, 10 and the current generator 11 are in a blocking state, so that all OLEDs are dark. Further, for the sake of convenience, it will be assumed that the first digital luminosity value received at input 15 is a value D1 corresponding to OLED 1-1. Reference is made to Figs 2 and 3 , which illustrate waveforms of output currents I DATA of current generator 11 and I 10 of current modulator 10.
  • the control block reacts to the luminosity value D 1 being input by closing switch 4-1 and making transistor 13 conductive, so that at a time t 1c (cf. Fig. 2 ) a positive current I DATA begins to flow from current generator 11 to circuit node 3.
  • the potential of circuit node 3 thus becomes positive.
  • This causes operational amplifier 6 to output a positive voltage which charges storage capacitor 5-1 and causes current modulator 2-1 to become conductive, enabling a continuous flow of current through resistor 14 and circuit node 3.
  • circuit node 3 will at first have a positive potential.
  • This positive potential causes operational amplifier 6 to output a current which continues to charge storage capacitor 2-1, thus gradually increasing the potential at the control electrode of current modulator 2-1 and increasing its conductivity.
  • Control block 12 continuously adjusts the control voltage applied to transistor 13, so that the current through circuit node 3 is kept constant at I D1 .
  • a steady state is reached in which circuit node 3 has ground potential. In this state, control block 12 reopens switch 4-1.
  • control block 12 carries out a reset procedure which, for better understanding, will be explained later on.
  • the control block 12 has received a second digital data specifying a desired luminosity D2 of OLED 1-2.
  • the potential of circuit node 3 becomes slightly positive, this time causing amplifier 6 to charge capacitor 5-2, and to make current modulator 2-2 conductive.
  • Control block 12 then opens switch 4-2, and at the time t 2d , it blocks transistor 13 and closes switch 8 again.
  • a potential decrease at circuit node 3 causes amplifier 7 to continue to charge capacitor 9, until the current I 10 through current modulator 10 becomes equal to I D1 +I D2 .
  • control block 12 begins a reset procedure by closing switch 4-1, whereby storage capacitor 5-1 is discharged and current modulator 2-1 becomes non-conductive. Then, switch 4-1 is reopened. The potential at circuit node 3 has become slightly positive. By closing switch 8 at time t 1b' , current modulator 10 is caused to adapt to this new situation: its current decreases to I ⁇ -I D1 .
  • This procedure of resetting OLED 1-1 enables the control block 12 to set the new luminosity D1' of this OLED in exactly the same way as described before referring to Fig. 2 :
  • Switch 4-2 is reopened, and at time t 1d' , current generator 11 blocks, and switch 8 is closed, so that the current I 10 supplied by modulator 10 increases to I ⁇ -I D1 +I D1' .
  • the procedure is continued in a similar manner for all other OLEDs 1-2, ...1-n.
  • control block 12 Since the control block 12 is used to program the luminosities of the OLEDs one by one, the resolution of the current generator 11 need not be higher than that of a single luminosity data received by the control block 12, regardless of the number of OLEDs in a column.
  • control block 12 consecutively programs the luminosities of a small number of OLEDs, e. g. OLEDs 1-1, 1-2, as described in the cited document.
  • the current I DATA output by current generator 11 amounts to I D1 +I D2 , if it is assumed that I D1 , I D2 are the current intensities corresponding to the desired luminosities D1, D2 of OLEDs 1-1, 1-2.
  • control block 12 makes the current generator 11 non-conductive, as described above referring to Fig.
  • image build-up speed may be increased by not resetting the current modulators 2 prior to programming them. It is easily understood that when the display has just been activated and a first image is formed, the reset step is not necessary.
  • any inaccuracy of I DATA may cause the luminosities of the OLEDs to drift.

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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)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Claims (7)

  1. Videoanzeigevorrichtung, die eine Matrix mit Zeilen und Spalten umfasst, wobei jede der Spalten umfasst:
    - eine Mehrzahl von Lichtemitterelementen (1-1, 1-2, ..., 1-n)
    - eine Mehrzahl erster Strommodulatoren (2-1, 2-2, ..., 2-n), von denen jeder einem der Lichtemitterelemente (1-1, 1-2, ..., 1-n) zugeordnet ist, die so angeordnet sind, dass sie von einem Schaltungsknoten (3) einen Speisestrom mit programmierbarer Stärke (ID1, ID2, ..., IDn) für das zugeordnete Lichtemitterelement (1-1, 1-2, ..., 1-n) entnehmen,
    - einen Stromgenerator (11), der durch Videodaten gesteuert wird, die die gewünschten Helligkeiten (D1, D2, ..., Dn) der Lichtemitterelemente repräsentieren, der so angeordnet ist, dass er dem Schaltungsknoten (3) einen ersten Strom (IDATA) zuführt, wobei die Stärke des ersten Stroms repräsentativ für die gewünschte Helligkeit (D1, D2, ..., Dn) mindestens eines der Lichtemitterelemente (1-1, 1-2, ..., 1-n) ist;
    wobei der Schaltungsknoten (3) einen spezifischen Spannungspegel aufweist, wenn die durch den Stromgenerator (11) zugeführte Stärke von dem Stromknoten (3) durch den ersten Strommodulator (2-1, 2-2, ...,2-n) entnommen wird, der dem mindestens einen Lichtemitterelement (1-1, 1-2, ..., 1-n) zugeordnet ist;
    gekennzeichnet durch
    - einen zweiten Strommodulator (10), der so ausgelegt ist, dass er dem Schaltungsknoten (3) einen zweiten Strom (I10) zuführt;
    - einen Komparator (7) mit einem ersten Eingang, der mit dem Schaltungsknoten (3) verbunden ist, und mit einem zweiten Eingang, der mit einem Referenzanschluss verbunden ist, wobei der Referenzanschluss konstant auf einem spezifischen Spannungspegel gehalten wird, wobei ein Ausgang des Komparators mit einem Steuereingang des zweiten Strommodulators (10) verbunden ist, um den zweiten Strom (I10) des zweiten Strommodulators (10) zu steuern.
  2. Anzeigevorrichtung nach Anspruch 1, bei der der Ausgang des Komparators (7) über einen Schalter (8) mit dem Steuereingang des zweiten Strommodulators (10) verbunden ist und bei der mit dem Steuereingang ein Speicherkondensator (9) verbunden ist, um ihn auf einer konstanten Spannung zu halten, wenn der Schalter (8) geöffnet ist.
  3. Anzeigevorrichtung nach Anspruch 1 oder 2, bei der der Komparator (7) ein Operationsverstärker mit einem invertierenden Eingang, der mit dem Schaltungsknoten (3) verbunden ist, und mit einem nichtinvertierenden Eingang, der mit dem Referenzanschluss verbunden ist, ist.
  4. Anzeigevorrichtung nach einem der vorhergehenden Ansprüche, die ferner einen zweiten Komparator (6) mit Eingängen, die mit dem Schaltungsknoten (3) und mit dem Referenzanschluss verbunden sind, und mit einer Mehrzahl von Schaltern (4-1, 4-2, ..., 4-n) zum wahlweisen Verbinden eines Ausgangs des zweiten Komparators (6) mit einem Steuereingang eines der ersten Strommodulatoren (2-1, 2-2, ..., 2-n) umfasst.
  5. Verfahren zum Betreiben der Anzeigevorrichtung nach Anspruch 1,
    wobei das Verfahren die folgenden Schritte umfasst:
    a) Zuführen eines ersten Stroms (IDATA; ID1, ID2, ..., IDn), der eine gewünschte Helligkeit (D1, D2, ..., Dn) mindestens eines ersten der Lichtemitterelemente repräsentiert, von dem Stromgenerator (11) zu dem Schaltungsknoten (3);
    b) Programmieren des ersten Strommodulators (2-1, 2-2, ..., 2-n), der dem mindestens einen der Lichtemitterelemente (1-1, 1-2, ..., 1-n) zugeordnet ist, um von dem Schaltungsknoten (3) den ersten Strom (ID1, ID2, ..., IDn) zu entnehmen, wodurch der Schaltungsknoten einen spezifischen Spannungspegel erreicht;
    c) Beenden des Zuführens des ersten Stroms (IDATA; ID1, ID2, ..., IDn) von dem Stromgenerator (11);
    d) Steuern der Stärke des zweiten Stroms (I10), der durch den zweiten Strommodulator (10) zugeführt wird, um den spezifischen Spannungspegel bei dem Schaltungsknoten (3) wiederherzustellen.
  6. Verfahren nach Anspruch 5, bei dem die Schritte a) bis d) für mindestens ein zweites der Lichtemitterelemente wiederholt werden und bei dem während des Wiederholens der Schritte a) und b) die Stärke des zweiten Stroms (I10) auf dem im vorhergehenden Schritt d) eingestellten Wert gehalten wird.
  7. Verfahren nach Anspruch 5 oder 6, bei dem die Schritte a) bis d) für das mindestens erste der Lichtemitterelemente (1-1, 1-2, ..., 1-n) wiederholt werden und bei dem zuvor der erste Strommodulator (2-1, 2-2, ..., 2-n), der dem mindestens einen der Lichtemitterelemente (1-1, 1-2, ..., 1-n) zugeordnet ist, so programmiert wird, dass er von dem Schaltungsknoten (3) keinen Strom entnimmt.
EP20070108551 2006-06-01 2007-05-21 Videoanzeigevorrichtung und Betriebsverfahren dafür Expired - Fee Related EP1863005B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070108551 EP1863005B1 (de) 2006-06-01 2007-05-21 Videoanzeigevorrichtung und Betriebsverfahren dafür

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06300542A EP1863001A1 (de) 2006-06-01 2006-06-01 Videoanzeigevorrichtung und Betriebsverfahren dafür
EP20070108551 EP1863005B1 (de) 2006-06-01 2007-05-21 Videoanzeigevorrichtung und Betriebsverfahren dafür

Publications (3)

Publication Number Publication Date
EP1863005A2 EP1863005A2 (de) 2007-12-05
EP1863005A3 EP1863005A3 (de) 2009-03-11
EP1863005B1 true EP1863005B1 (de) 2010-08-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103547019A (zh) * 2012-07-13 2014-01-29 海尔集团公司 一种控制照明灯渐亮的装置及包含所述装置的冰箱

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1064642A1 (de) * 1999-01-21 2001-01-03 Koninklijke Philips Electronics N.V. Organische elektrolumineszierende anzeigevorrichtung
TW550530B (en) * 2000-10-27 2003-09-01 Semiconductor Energy Lab Display device and method of driving the same
DE10254511B4 (de) * 2002-11-22 2008-06-05 Universität Stuttgart Aktiv-Matrix-Ansteuerschaltung
ATE445895T1 (de) * 2003-12-23 2009-10-15 Thomson Licensing Vorrichtung zum anzeigen von bildern auf einer oled aktivmatrix
JP5074769B2 (ja) * 2003-12-31 2012-11-14 トムソン ライセンシング 画像表示装置、及びその駆動方法
EP1622120A1 (de) * 2004-07-29 2006-02-01 Thomson Licensing Anzeigevorrichtung mit aktiver Matrix und Verfahren zur Steuerung einer solchen Vorrichtung

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EP1863005A2 (de) 2007-12-05

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