CA2509201A1 - Oled luminance degradation compensation technique - Google Patents

Oled luminance degradation compensation technique Download PDF

Info

Publication number
CA2509201A1
CA2509201A1 CA002509201A CA2509201A CA2509201A1 CA 2509201 A1 CA2509201 A1 CA 2509201A1 CA 002509201 A CA002509201 A CA 002509201A CA 2509201 A CA2509201 A CA 2509201A CA 2509201 A1 CA2509201 A1 CA 2509201A1
Authority
CA
Canada
Prior art keywords
oled
compensation technique
luminance degradation
degradation compensation
oled luminance
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.)
Abandoned
Application number
CA002509201A
Other languages
French (fr)
Inventor
Nathan Arokia
Chaji G. Reza
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.)
Ignis Innovation Inc
Original Assignee
Ignis Innovation Inc
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 Ignis Innovation Inc filed Critical Ignis Innovation Inc
Priority to CA002509201A priority Critical patent/CA2509201A1/en
Priority to CA002590366A priority patent/CA2590366C/en
Priority to TW094144535A priority patent/TWI402790B/en
Priority to EP11168677.0A priority patent/EP2383720B1/en
Priority to EP13187593.2A priority patent/EP2688058A3/en
Priority to JP2007545796A priority patent/JP5128287B2/en
Priority to EP05819617.1A priority patent/EP1836697B1/en
Priority to PCT/CA2005/001897 priority patent/WO2006063448A1/en
Priority to US11/304,162 priority patent/US7619597B2/en
Priority to CN2005800480205A priority patent/CN101116129B/en
Priority to KR1020077016146A priority patent/KR20070101275A/en
Priority to CA002526782A priority patent/CA2526782C/en
Publication of CA2509201A1 publication Critical patent/CA2509201A1/en
Priority to US12/571,968 priority patent/US8259044B2/en
Priority to JP2012045806A priority patent/JP5822759B2/en
Priority to US13/568,784 priority patent/US8736524B2/en
Priority to US14/157,031 priority patent/US8994625B2/en
Priority to US14/175,493 priority patent/US8816946B2/en
Priority to US14/253,422 priority patent/US9275579B2/en
Priority to US14/261,755 priority patent/US9280933B2/en
Priority to JP2014240307A priority patent/JP6086893B2/en
Priority to US14/643,584 priority patent/US9970964B2/en
Priority to US14/738,393 priority patent/US10012678B2/en
Priority to US14/816,817 priority patent/US10013907B2/en
Priority to US16/005,177 priority patent/US10699624B2/en
Priority to US16/914,533 priority patent/US11270621B2/en
Priority to US17/582,446 priority patent/US20220223094A1/en
Abandoned legal-status Critical Current

Links

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
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements

Abstract

Disclosed is a technique for providing stable brightness for active matrix light emitting displays, in particular, active matrix organic light emitting diode (AMOLED) displays.
The technique includes a driving method to extract the aging of the pixels and to generate luminance.

Description

FIELD OF THE INVENTION
The present invention generally relates to a light emitting display devices, and particularly, to a driving technique for AMOLEDs, to enhance the brightness stability of the OLED
by using circuit compensation.
SUMMARY OF INVENTION
The disclosed technique extracts the time dependent parameters of the pixel.
Then, the programming-voltage is calibrated with the extracted information, resulting in stable pixel brightness over time.
Advantages The pixel circuit provides stable brightness that is independent of pixel aging under prolonged display operation, to e~ciently improve the display operating lifetime.

FIG. 1 (a) shows a pixel circuit. This method is valid with complementary devices (p-type transistors) as well.
The pixel circuit comprises three transistors Tl, T2 and T3, a storage capacitor 10 and an organic light-emitting diode (OLED) 11. The pixel circuit is connected to two select lines (SEL1 and SEL2), a signal line (VDATA), a monitor line (Monitor), a voltage line (VDD), and a common ground.
Transistors T1, T2 and T3 can be amorphous silicon, poly silicon, or organic thin-film transistors (TFT) or standard NMOS or CMOS technology.
The source and drain terminals of the driving transistor T1 are connected to the ground and cathode electrode of the OLED 11, respectively. The gate terminal of T1 is connected to the input signal line (VDATA) through T2 and the drain terminal of T1 is connected to the output signal line through T3.
The source terminal of T2 is connected to the gate of T1 and its drain terminal is connected to the input signal line (VDATA). The drain terminal of T3 is connected to the source terminal of T1 and its source terminal is connected to the output signal line (Monitor).
Transistor T3 is a switch. The gate terminal of T3 is connected to SEL2. The source terminal of T3 is connected to a monitor line (Monitor), and the drain terminal is connected to the cathode terminal of the OLED 11. The cathode electrode of the OLED 11 is connected to the common VDD.
During the driving cycle, the OLED voltage is extracted while SEL2 is high.
Since the OLED voltage has been reported to be correlated with the brightness degradation in the OLED, the programming voltage can be modified by the OLED voltage to provide a constant brightness.
However, a higher operating voltage is required in this case. As reported, the OLED
characteristics improve under negative bias stress. As a result, a negative bias related to the stress history of the pixel, extracted from the OLED voltage, can be applied to the OLED during the time in which the display is not operating.
FIG. 1 (b-d) are the other pixel circuits that are appropriate for this driving scheme.

FIG. 1 is two circuit diagrams of an embodiment of a pixel circuit.

Claims
CA002509201A 2004-12-15 2005-06-08 Oled luminance degradation compensation technique Abandoned CA2509201A1 (en)

Priority Applications (26)

Application Number Priority Date Filing Date Title
CA002509201A CA2509201A1 (en) 2005-06-08 2005-06-08 Oled luminance degradation compensation technique
CA002526782A CA2526782C (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
TW094144535A TWI402790B (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
EP11168677.0A EP2383720B1 (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
EP13187593.2A EP2688058A3 (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
CA002590366A CA2590366C (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
JP2007545796A JP5128287B2 (en) 2004-12-15 2005-12-15 Method and system for performing real-time calibration for display arrays
EP05819617.1A EP1836697B1 (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
PCT/CA2005/001897 WO2006063448A1 (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
US11/304,162 US7619597B2 (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
CN2005800480205A CN101116129B (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
KR1020077016146A KR20070101275A (en) 2004-12-15 2005-12-15 Method and system for programming, calibrating and driving a light emitting device display
US12/571,968 US8259044B2 (en) 2004-12-15 2009-10-01 Method and system for programming, calibrating and driving a light emitting device display
JP2012045806A JP5822759B2 (en) 2004-12-15 2012-03-01 System for display array
US13/568,784 US8736524B2 (en) 2004-12-15 2012-08-07 Method and system for programming, calibrating and driving a light emitting device display
US14/157,031 US8994625B2 (en) 2004-12-15 2014-01-16 Method and system for programming, calibrating and driving a light emitting device display
US14/175,493 US8816946B2 (en) 2004-12-15 2014-02-07 Method and system for programming, calibrating and driving a light emitting device display
US14/253,422 US9275579B2 (en) 2004-12-15 2014-04-15 System and methods for extraction of threshold and mobility parameters in AMOLED displays
US14/261,755 US9280933B2 (en) 2004-12-15 2014-04-25 System and methods for extraction of threshold and mobility parameters in AMOLED displays
JP2014240307A JP6086893B2 (en) 2004-12-15 2014-11-27 Method for extracting circuit parameters
US14/643,584 US9970964B2 (en) 2004-12-15 2015-03-10 Method and system for programming, calibrating and driving a light emitting device display
US14/738,393 US10012678B2 (en) 2004-12-15 2015-06-12 Method and system for programming, calibrating and/or compensating, and driving an LED display
US14/816,817 US10013907B2 (en) 2004-12-15 2015-08-03 Method and system for programming, calibrating and/or compensating, and driving an LED display
US16/005,177 US10699624B2 (en) 2004-12-15 2018-06-11 Method and system for programming, calibrating and/or compensating, and driving an LED display
US16/914,533 US11270621B2 (en) 2004-12-15 2020-06-29 Method and system for programming, calibrating and/or compensating, and driving an LED display
US17/582,446 US20220223094A1 (en) 2004-12-15 2022-01-24 Method and system for programming, calibrating and/or compensating, and driving an led display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002509201A CA2509201A1 (en) 2005-06-08 2005-06-08 Oled luminance degradation compensation technique

Publications (1)

Publication Number Publication Date
CA2509201A1 true CA2509201A1 (en) 2006-12-08

Family

ID=37545633

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002509201A Abandoned CA2509201A1 (en) 2004-12-15 2005-06-08 Oled luminance degradation compensation technique

Country Status (1)

Country Link
CA (1) CA2509201A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107039004A (en) * 2017-06-08 2017-08-11 深圳市华星光电技术有限公司 The aging compensation approach of AMOLED display panels
CN108492783A (en) * 2018-03-29 2018-09-04 深圳市华星光电半导体显示技术有限公司 The pixel-driving circuit of AMOLED display device and the driving method of AMOLED display device
WO2019218719A1 (en) * 2018-05-14 2019-11-21 京东方科技集团股份有限公司 Pixel circuit and driving method therefor, and display device
CN111210787A (en) * 2020-02-12 2020-05-29 京东方科技集团股份有限公司 Pixel driving circuit, display device and pixel driving method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107039004A (en) * 2017-06-08 2017-08-11 深圳市华星光电技术有限公司 The aging compensation approach of AMOLED display panels
CN108492783A (en) * 2018-03-29 2018-09-04 深圳市华星光电半导体显示技术有限公司 The pixel-driving circuit of AMOLED display device and the driving method of AMOLED display device
WO2019218719A1 (en) * 2018-05-14 2019-11-21 京东方科技集团股份有限公司 Pixel circuit and driving method therefor, and display device
US11348517B2 (en) 2018-05-14 2022-05-31 Boe Technology Group Co., Ltd. Pixel circuit, driving method thereof and display device
CN111210787A (en) * 2020-02-12 2020-05-29 京东方科技集团股份有限公司 Pixel driving circuit, display device and pixel driving method
CN111210787B (en) * 2020-02-12 2022-07-29 京东方科技集团股份有限公司 Pixel driving circuit, display device and pixel driving method

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