CA2694086A1 - Stable fast programing scheme for displays - Google Patents

Stable fast programing scheme for displays Download PDF

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Publication number
CA2694086A1
CA2694086A1 CA2694086A CA2694086A CA2694086A1 CA 2694086 A1 CA2694086 A1 CA 2694086A1 CA 2694086 A CA2694086 A CA 2694086A CA 2694086 A CA2694086 A CA 2694086A CA 2694086 A1 CA2694086 A1 CA 2694086A1
Authority
CA
Canada
Prior art keywords
displays
programing
scheme
calibration
stable fast
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
CA2694086A
Other languages
French (fr)
Inventor
Reza Chaji
Arokia Nathan
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 CA2694086A priority Critical patent/CA2694086A1/en
Priority to US12/944,477 priority patent/US8497828B2/en
Priority to US12/944,491 priority patent/US8633873B2/en
Priority to US12/944,488 priority patent/US8283967B2/en
Priority to EP20120174465 priority patent/EP2509062A1/en
Priority to CN201080056457.4A priority patent/CN102656621B/en
Priority to EP20120174463 priority patent/EP2506242A3/en
Priority to JP2012538429A priority patent/JP2013511061A/en
Priority to EP10829593.2A priority patent/EP2499633A4/en
Priority to PCT/IB2010/002898 priority patent/WO2011058428A1/en
Publication of CA2694086A1 publication Critical patent/CA2694086A1/en
Priority to US14/132,840 priority patent/US9030506B2/en
Priority to US14/699,752 priority patent/US9818376B2/en
Priority to JP2016072396A priority patent/JP6488254B2/en
Priority to US15/783,802 priority patent/US10685627B2/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
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than 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
    • 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
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • 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
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)

Abstract

Disclosed is a technique to improve the display uniformity.

Description

SUMMARY OF INVENTION

The disclosed techniques provide a faster calibration of reference current sources and also reduce the noise effect by improving the dynamic range.

ADVANTAGES
It can help improve the display uniformity and lifetime despite instability and non-uniformity of individual devices.

This technique can be applied to any type of displays including active matrix organic light emitting diode (AMOLED) displays. It can also be adapted for any thin film transistor backplane technology including, but not limited to, amorphous silicon, poly-Si, nano/micro-Si, metal oxide, and organic semiconductors, nanowire/nanotube and nanocomposite channel layers, and crystalline semiconductors. .

In previously introduced voltage-programming current-biasing technique, two levels of calibration take in place. The first level is the calibration of current sources with a reference current. The second level is calibration of the display with the current sources. Figure 1 shows an embodiment of a technique to improve the calibration speed. Here, two rows of calibration current sources are used. While one row of current sources is being used to calibrate the panel, the other row of current sources is being calibrated with a reference current. As a result, the entire frame can be used to calibrate the current sources with external current. This enables the use of voltage-programming current-biasing technique in higher resolutions, high frame rate displays including 120-Hz or higher and full HD
(1920x1080) or other resolution displays, as well as 3D displays, including flat-panel holographic displays. One can use more than two rows for calibration current sources.

The trend in improving OLED efficiency results in reduction of required current. Thus, backplane technologies with high mobility will have limited input dynamic range and so noise and cross talk will cause significant error in the pixel data. To improve this, a damping technique is developed that can damp the input signal and the programming noise with the same rate. Figure 2 shows a pixel embodiment adapting this technique. Here, the storage capacitor is divided into two smaller capacitors.
Since C52 is beneath the Vdd line, it will help to improve the aperture ratio as well. Here, the final voltage at node A will be as following //

VA= VB+ (VP-Vref Vn)(CSL (CS1+C52) where VB is the calibration voltage created by Ibias, Vp the programming voltage, Võ the programming noise and cross talk.

Figure 3 shows another embodiment that adapted the damping capacitor.

Claims
CA2694086A 2009-11-12 2010-02-17 Stable fast programing scheme for displays Abandoned CA2694086A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
CA2694086A CA2694086A1 (en) 2010-02-17 2010-02-17 Stable fast programing scheme for displays
US12/944,477 US8497828B2 (en) 2009-11-12 2010-11-11 Sharing switch TFTS in pixel circuits
US12/944,491 US8633873B2 (en) 2009-11-12 2010-11-11 Stable fast programming scheme for displays
US12/944,488 US8283967B2 (en) 2009-11-12 2010-11-11 Stable current source for system integration to display substrate
JP2012538429A JP2013511061A (en) 2009-11-12 2010-11-12 Efficient programming and fast calibration for light-emitting displays and their stable current sources and sinks
CN201080056457.4A CN102656621B (en) 2009-11-12 2010-11-12 For effective programming of active display and quickly calibrated scheme and the constant current source/heavy for active display
EP20120174463 EP2506242A3 (en) 2009-11-12 2010-11-12 Efficient programming and fast calibration schemes for light-emitting displays and stable current source/sinks for the same
EP20120174465 EP2509062A1 (en) 2009-11-12 2010-11-12 Efficient programming and fast calibration schemes for light-emitting displays and stable current source/sinks for the same
EP10829593.2A EP2499633A4 (en) 2009-11-12 2010-11-12 Efficient programming and fast calibration schemes for light-emitting displays and stable current source/sinks for the same
PCT/IB2010/002898 WO2011058428A1 (en) 2009-11-12 2010-11-12 Efficient programming and fast calibration schemes for light-emitting displays and stable current source/sinks for the same
US14/132,840 US9030506B2 (en) 2009-11-12 2013-12-18 Stable fast programming scheme for displays
US14/699,752 US9818376B2 (en) 2009-11-12 2015-04-29 Stable fast programming scheme for displays
JP2016072396A JP6488254B2 (en) 2009-11-12 2016-03-31 Efficient programming and fast calibration for light-emitting displays and their stable current sources and sinks
US15/783,802 US10685627B2 (en) 2009-11-12 2017-10-13 Stable fast programming scheme for displays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2694086A CA2694086A1 (en) 2010-02-17 2010-02-17 Stable fast programing scheme for displays

Publications (1)

Publication Number Publication Date
CA2694086A1 true CA2694086A1 (en) 2011-08-17

Family

ID=44483702

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2694086A Abandoned CA2694086A1 (en) 2009-11-12 2010-02-17 Stable fast programing scheme for displays

Country Status (1)

Country Link
CA (1) CA2694086A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336832A1 (en) * 2016-12-19 2018-06-20 LG Display Co., Ltd. Display device and method for calibrating the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336832A1 (en) * 2016-12-19 2018-06-20 LG Display Co., Ltd. Display device and method for calibrating the same
US10249248B2 (en) 2016-12-19 2019-04-02 Lg Display Co., Ltd. Display device

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