EP1638070A3 - Verfahren und Schaltungsanordnung zur Alterungskompensation einer organischen Leuchtdiode - Google Patents

Verfahren und Schaltungsanordnung zur Alterungskompensation einer organischen Leuchtdiode Download PDF

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Publication number
EP1638070A3
EP1638070A3 EP05020442A EP05020442A EP1638070A3 EP 1638070 A3 EP1638070 A3 EP 1638070A3 EP 05020442 A EP05020442 A EP 05020442A EP 05020442 A EP05020442 A EP 05020442A EP 1638070 A3 EP1638070 A3 EP 1638070A3
Authority
EP
European Patent Office
Prior art keywords
emitting diode
current
light emitting
value pair
voltage value
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.)
Granted
Application number
EP05020442A
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English (en)
French (fr)
Other versions
EP1638070A2 (de
EP1638070B1 (de
Inventor
Oliver Schneider
Jan Birnstock
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.)
NovaLED GmbH
Original Assignee
NovaLED GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NovaLED GmbH filed Critical NovaLED GmbH
Publication of EP1638070A2 publication Critical patent/EP1638070A2/de
Publication of EP1638070A3 publication Critical patent/EP1638070A3/de
Application granted granted Critical
Publication of EP1638070B1 publication Critical patent/EP1638070B1/de
Ceased 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
    • 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
    • G09G2320/029—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

Landscapes

  • 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)
  • Electroluminescent Light Sources (AREA)

Abstract

Der Erfindung bezieht sich auf ein Verfahren und eine Schaltungsanordnung zur Alterungskompensation einer organischen Lichtemitterdiode (OLED), die aus einer Versorgungsspannung gespeist und über einen in einem Sättigungsbetrieb betriebenen Treibertransistor geschaltet wird, mittels einer Ansteuerung der Lichtemitterdiode. Das Verfahren umfaßt die folgenden Schritte: Speichern zumindest eines Soll-Strom-Spannungs-Wertepaares einer Soll-Strom-Spannungs-Kennlinie der Lichtemitterdiode; Überführen des Treibertransistors während eines Messzyklus aus dem Sättigungsbetrieb in einen Linearbetrieb; Messen eines Stromwertes für den Strom durch die Lichtemitterdiode mittels einer Strommessschaltung in dem Messzyklus; Ermitteln mindestens eines aktuellen Strom-Spannungs-Wertepaares einer aktuellen Strom-Spannungs-Kennlinie der Lichtemitterdiode mittels des gemessenen Stromwertes; Vergleichen des mindestens einen aktuellen Strom-Spannungs-Wertepaares der Lichtemitterdiode mit dem Soll-Strom-Spannungs-Wertepaar der Lichtemitterdiode und Erzeugen von Ansteuerparametern für die Ansteuerung der Lichtemitterdiode in Abhängigkeit vom Ergebnis des Vergleichs.
EP05020442A 2004-09-20 2005-09-20 Verfahren und Schaltungsanordnung zur Alterungskompensation einer organischen Leuchtdiode Ceased EP1638070B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004045871A DE102004045871B4 (de) 2004-09-20 2004-09-20 Verfahren und Schaltungsanordnung zur Alterungskompensation von organischen Lichtemitterdioden

Publications (3)

Publication Number Publication Date
EP1638070A2 EP1638070A2 (de) 2006-03-22
EP1638070A3 true EP1638070A3 (de) 2006-10-18
EP1638070B1 EP1638070B1 (de) 2008-08-20

Family

ID=35539261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05020442A Ceased EP1638070B1 (de) 2004-09-20 2005-09-20 Verfahren und Schaltungsanordnung zur Alterungskompensation einer organischen Leuchtdiode

Country Status (3)

Country Link
US (1) US7656370B2 (de)
EP (1) EP1638070B1 (de)
DE (1) DE102004045871B4 (de)

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Also Published As

Publication number Publication date
DE102004045871B4 (de) 2006-11-23
DE102004045871A1 (de) 2006-04-06
EP1638070A2 (de) 2006-03-22
EP1638070B1 (de) 2008-08-20
US7656370B2 (en) 2010-02-02
US20060214888A1 (en) 2006-09-28

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