US20180137812A1 - Method and device for current compensation for an electroluminescent display - Google Patents

Method and device for current compensation for an electroluminescent display Download PDF

Info

Publication number
US20180137812A1
US20180137812A1 US15/811,337 US201715811337A US2018137812A1 US 20180137812 A1 US20180137812 A1 US 20180137812A1 US 201715811337 A US201715811337 A US 201715811337A US 2018137812 A1 US2018137812 A1 US 2018137812A1
Authority
US
United States
Prior art keywords
display
image data
mura
pixel unit
compensation
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
US15/811,337
Inventor
Yi Wei Yan
Chin-Rung Yan
Yen-Jen Lai
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.)
INT Tech Co Ltd
Original Assignee
INT Tech Co Ltd
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
Priority to US201662421435P priority Critical
Application filed by INT Tech Co Ltd filed Critical INT Tech Co Ltd
Priority to US15/811,337 priority patent/US20180137812A1/en
Assigned to INT TECH CO., LTD. reassignment INT TECH CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAI, YEN-JEN, YAN, YI WEI, YAN, CHIN-RUNG
Publication of US20180137812A1 publication Critical patent/US20180137812A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/0203Particular design considerations for integrated circuits
    • H01L27/0207Geometrical layout of the components, e.g. computer aided design; custom LSI, semi-custom LSI, standard cell technique
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • G09G3/3233Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3266Details of drivers for scan electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2092Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1446Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • G09G3/3258Control 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 voltage across the light-emitting element
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3275Details of drivers for data electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3674Details of drivers for scan electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/52Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
    • H01L23/522Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
    • H01L23/528Geometry or layout of the interconnection structure
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/04Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
    • H01L27/08Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind
    • H01L27/085Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
    • H01L27/088Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3206Multi-colour light emission
    • H01L27/3211Multi-colour light emission using RGB sub-pixels
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3241Matrix-type displays
    • H01L27/3244Active matrix displays
    • H01L27/3248Connection of the pixel electrode to the TFT
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; Multistep manufacturing processes therefor
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
    • H01L29/08Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
    • H01L29/0843Source or drain regions of field-effect devices
    • H01L29/0847Source or drain regions of field-effect devices of field-effect transistors with insulated gate
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/41Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
    • H01L29/417Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
    • H01L29/41725Source or drain electrodes for field effect devices
    • H01L29/41733Source or drain electrodes for field effect devices for thin film transistors with insulated gate
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/78Field effect transistors with field effect produced by an insulated gate
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L51/00Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
    • H01L51/50Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof specially adapted for light emission, e.g. organic light emitting diodes [OLED] or polymer light emitting devices [PLED]
    • H01L51/5012Electroluminescent [EL] layer
    • H01L51/5036Multi-colour light emission, e.g. colour tuning, polymer blend, stack of electroluminescent layers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/02Composition of display devices
    • G09G2300/026Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active 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
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active 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
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0819Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0278Details of driving circuits arranged to drive both scan and data electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0204Compensation of DC component across the pixels in flat panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/029Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing
    • G09G2320/045Compensation of drifts in the characteristics of light emitting or modulating elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3241Matrix-type displays
    • H01L27/3244Active matrix displays

Abstract

A method for current compensation in an electroluminescent (EL) display is provided. The method includes measuring an intensity of light of a pixel unit, identifying a pixel unit to be one that needs compensation if the measured intensity exceeds a predetermined threshold, determining the magnitude of a compensation current, and providing an image data corresponding to the magnitude of the compensation current to the identified pixel unit.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application claims priority to U.S. provisional application Ser. No. 62/421,435, filed Nov. 14, 2016, the disclosure of which is hereby incorporated herein by reference.
  • BACKGROUND
  • In an active matrix organic light emitting diode (AMOLED) display, each pixel unit includes a capacitor for storing data so that the pixel unit can be maintained at an illumination state. Such driving mechanism is suitable for the development of large-size, high-resolution displays. As a result, AMOLED has become increasingly important in the research and development of advanced displays such as flexible displays. For an OLED device, its luminescence is determined by the magnitude of current flowing through the OLED device, which in turn is determined by the thresh old voltage Vth of the OLED device. For a display that comprises a plurality of the OLED devices, the magnitude of current may be different from one OLED device to another due to variation in Vth, resulting in a non-uniform luminescence across the pixel units. The threshold variation may result from manufacturing factors or device aging.
  • SUMMARY
  • Embodiments of the present invention provide a method for current compensation in an electroluminescent (EL) display. The method includes measuring an intensity of light of a pixel unit, identifying a pixel unit to be one that needs compensation if the measured intensity exceeds a predetermined threshold, determining the magnitude of a compensation current, and providing an image data corresponding to the magnitude of the compensation current to the identified pixel unit.
  • In an embodiment, the method further includes providing an image data of a predetermined grayscale to a pixel unit under measurement before measuring an intensity of light of the pixel unit.
  • In another embodiment, the operation of identifying a pixel unit further includes comparing the measured intensity with the predetermined grayscale.
  • In yet another embodiment, the operation of determining the magnitude of a compensation current further includes calculating a difference between the measured intensity and the predetermined grayscale, and converting the difference into the magnitude of a compensation current.
  • In still another embodiment, the method further includes determining the location of the identified pixel unit.
  • In yet still another embodiment, wherein the pixel unit is driven by a gate driver integrated circuit (IC) and a source driver IC, the method further includes providing information on the location of the identified pixel unit to the gate driver IC, and providing information on the magnitude of a compensation current to the source driver IC.
  • Some embodiments of the present invention provide a method for current compensation. The method includes obtaining real-time image data on mura of a display of a mobile device, storing the real-time image data on mura in a memory of the mobile device, and determining pixels that need compensation based on the real-time image data on mura.
  • In an embodiment, the operation of obtaining real-time image data on mura of a display of a mobile device includes taking a picture of an image displayed by the display of the mobile device.
  • In another embodiment, the method further includes updating in the memory an original image data on mura with the real-time image data on mura.
  • In yet another embodiment, the original image data on mura is stored in the memory when the mobile device is manufactured.
  • In still another embodiment, the original image data on mora includes a previously stored image data on mura.
  • In yet still another embodiment, the memory includes a flash IC.
  • Embodiments of the present invention also provide an electroluminescent (EL) display. The EL display includes a substrate, an EL device layer over the substrate, and an optical sensor layer over the substrate. The EL device layer includes a number of EL devices. The optical sensor layer includes first sensors arranged in a first direction and second sensors arranged in a second direction. The first sensors and the second sensors intersect one another at intersection points. The optical sensor layer is configured to identify a region of the EL device layer for compensation by detecting impedance at each intersection point from a reference point.
  • In an embodiment, the substrate includes one of a low temperature polysilicon (LTPS) substrate and an indium gallium zinc oxide (IGZO) substrate.
  • In another embodiment, the EL device includes one of an organic light emitting diode (OLED), a micro LED and a quantum dot LED (QLED).
  • In yet another embodiment, the optical sensor layer has a same size as the substrate.
  • In still another embodiment, The EL display according to claim 13, wherein the optical sensor layer 33 is made of a relatively high transparent material.
  • In yet still another embodiment, the EL display further includes a measuring module configured to measure an intensity of light of an EL device. In addition, the EL display includes an analyzing module configured to identify an EL device to be one that needs compensation if the measured intensity exceeds a predetermined threshold. Moreover, the EL display includes a calculating module configured to determine the magnitude of a compensation current for the identified EL device.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
  • FIG. 1 is a flow diagram of a method for current compensation in an electroluminescent (EL) display, in accordance with some embodiments.
  • FIG. 2 is a block diagram of a system comprising a device for current compensation, in accordance with some embodiments.
  • FIG. 3 is a cross-sectional diagram of an EL display, in accordance with some embodiments.
  • FIG. 4 is a schematic diagram showing function of an optical sensor layer in the EL display illustrated in FIG. 3, in accordance with some embodiments.
  • FIGS. 5A and 5B are diagrams showing an optical sensor layer in the EL display illustrated in FIG. 3, in accordance with some embodiments.
  • FIG. 6A is a schematic diagram of a system for obtaining real-time image data on mura, in accordance with some embodiments.
  • FIG. 6B is a schematic block diagram showing a method of updating image data on mura, in accordance with some embodiments.
  • FIG. 7 is a flow diagram of a method for current compensation in an electroluminescent (EL) display, in accordance with some embodiments.
  • DETAILED DESCRIPTION
  • The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
  • Further, it will be understood that when an element is referred to as being “connected to” or “coupled to” another element, it may be directly connected to or coupled to the other element, or intervening elements may be present.
  • FIG. 1 is a flow diagram of a method for current compensation in an electroluminescent (EL) display, in accordance with some embodiments.
  • Referring to FIG. 1, in operation 11, intensity of light of each pixel unit in a display is measured. The display may include an electroluminescent (EL) display, for example, an active matrix organic light emitting diode (AMOLED) display. Moreover, the display may include pixel units, a gate driver integrated circuit (IC) and a source driver IC. The pixel units are arranged in, for example, an N×M matrix. The gate driver IC selects one or more rows of pixel units in the N rows of pixel units, while the source driver provides image data to selected pixel units in the M columns of pixel units. Each of the pixel units includes an EL device. The EL device may include, for example, a current-driven element that may further include an organic light emitting diode (OLED), a micro LED or a quantum dot LED (QLED).
  • The intensity of light of a pixel unit is a function of current that flows through the EL device of the pixel unit. Moreover, the intensity may be different from one pixel unit to another due to variation in the Vth of the EL device. In an embodiment, to measure the intensity, an image data of a predetermined grayscale is provided from the source driver IC to the pixel units.
  • Next, in operation 12, it is determined, based on the measured intensity of light in each pixel unit, whether current distribution across the array of pixel units is uniform. In an embodiment, if the measured intensity of a pixel unit, when compared with the predetermined grayscale, exceeds a predetermined threshold, the pixel unit is identified as one that needs current compensation.
  • If in operation 12 it is determined that the current distribution is uniform, then in operation 13, a state of Mura is updated.
  • In general, a Mura effect means a non-uniform or uneven display surface caused by an imperfect illumination of pixel units. The Mura effect may appear to be brighter or darker, less saturated, poor in contrast or from the general display presentation deviating areas, spots or pixels.
  • Therefore, if in operation 12 the current distribution is not uniform, then in operation 14, the location of a pixel unit that is identified in operation 12 is determined.
  • In operation 15, the magnitude of a compensation current for the pixel unit of interest, i.e., the pixel unit identified in operation 12, is determined. In an embodiment, an offset between the measured intensity and the predetermined grayscale is calculated to determine an amount of compensation. The amount of compensation is then converted into an image data corresponding to the magnitude of the compensation current.
  • In operation 16, information on the magnitude of a compensation current for the pixel unit of interest is provided to a source driver IC. In addition, in operation 17, information on the location of the pixel unit of interest is provided to a gate driver IC.
  • Subsequently, in operation 18, the pixel unit of interest is compensated based on the image data.
  • FIG. 2 is a block diagram of a system 20 comprising a device 21 for current compensation, in accordance with some embodiments.
  • Referring to FIG. 2, the system 20 includes a display 26 as well as the device 21. The display 26, which may be an EL display, includes an array of pixel units 260 and driver ICs 264. The device 21, configured to compensate the display 26 for non-uniform current distribution, includes a controller 210, a measuring module 212, an analyzing module 215, a calculating module 218 and a memory 217.
  • The measuring module 212, under the control of the controller 210, measures intensity of light of the array of pixel units 260. In operation, the controller 210 commands the driver ICs 264 to provide an image data of a predetermined grayscale to the array of pixel units 260 to facilitate measurement by the measuring module 212. A value of the predetermined grayscale may be stored in the memory 217.
  • In response to a measuring result, the analyzing module 215 determines whether a pixel unit needs to be compensated by, for example, comparing a measured intensity with the predetermined grayscale. If such a pixel unit is identified, the location of the identified pixel unit is stored in the memory 217.
  • The calculating module 218, based on a difference between the measured intensity and the predetermined grayscale, determines the amount of compensation and then converts the amount of compensation into an image data corresponding to the magnitude of a compensation current.
  • The controller 210, based on information on the location of the identified pixel unit and the magnitude of compensation current for the identified pixel unit, commands the driver ICs to provide the image data to the pixel units at the location.
  • The device 21 in some embodiment may be merged into the display 26, as will be discussed with reference to FIGS. 3 to 5 below.
  • FIG. 3 is a cross-sectional diagram of an EL display 30, in accordance with some embodiments.
  • Referring to FIG. 3, the EL display 30 includes a substrate 31, an EL device layer 32 and an optical sensor layer 33. The substrate 31 may include a low temperature polysilicon (LTPS) substrate or an indium gallium zinc oxide (IGZO) substrate. The EL device layer 32, disposed between the substrate 31 and the optical sensor layer 33, includes EL devices that may include OLEDs micro LEDs or quantum dot LEDs (QLEDs). The optical sensor layer 33 is configured to detect if non-uniform illumination such as Mura effect occurs in the EL device layer 32 and, if any, determines a region of interest in the EL device layer 32. In an embodiment, the optical sensor 33 is integrated into a touch panel (not shown) of the EL display 30.
  • FIG. 4 is a schematic diagram showing function of the optical sensor layer 33 in the EL display 30 illustrated in FIG. 3, in accordance with some embodiments.
  • Referring to FIG. 4, a region 320 in the EL device layer 32 is detected as a region of non-uniform illumination region (shown in a dashed arrow). To detect a non-uniform illumination region, pixel units in the EL display 30 are provided with a predetermined grayscale value. Sensors in the optical sensor layer 33 detect if there is a region of interest and, if any, report the location of the region of interest and an optical difference in intensity of light to a controller. The region may be as small as a single pixel unit, or as large as the entire array of pixel units. Subsequently, a converter converts the optical difference into an image data. The controller commands driver ICs to adjust the region of interest based on the image data. The method and device for compensation are similar to or same as those described and illustrated with FIGS. 1 and 2, and therefore are not further discussed.
  • FIGS. 5A and 5B are diagrams showing the optical sensor layer 33 in the EL display 30 illustrated in FIG. 3, in accordance with some embodiments.
  • Referring to FIG. 5A, the optical sensor layer 33 includes first sensors 51 and second sensors 52. The first sensors 51 extend in a first direction, while the second sensors 52 extend in a second direction substantially orthogonal to the first direction. As a result, the first sensors 51 and the second sensors 52 intersect one another at intersection points. In an embodiment, the optical sensor layer 33 has substantially the same size as a touch panel of the EL display 30. Moreover, the optical sensor layer 33 is made of a relatively high transparent material to prevent the touch panel from optical loss. The first sensors 51 and the second sensors 52 in the optical sensor layer 33 detect the resistance at each intersection point from a reference point. The reference point may be predetermined by a user of the EL display 30. A linear relationship exists between the resistance of an intersection point and a distance between the intersection point and the reference point. However, for a non-uniform illumination region, such as the region 320 shown in FIG. 5B, no such linear relationship may exist. Accordingly, when the EL device layer 32 emits light, a non-uniform illumination region is detected. The location of the region of interest and an image data corresponding to the amount of optical difference are sent to driver ICs for compensating the region of interest.
  • FIG. 5B thus illustrates a method for obtaining image data on mura by detecting non-uniform illumination regions. In other embodiments, as will be discussed with reference to FIGS. 6A and 6B, image data on mura may be obtained in real time by taking an image displayed by a display device.
  • FIG. 6A is a schematic diagram of a system 60 for obtaining real-time image data on mura, in accordance with some embodiments.
  • Referring to FIG. 6A, the system 60 includes a camera 61 and a mobile device 67. The camera 61, which may include a monocular camera, a digital camera, or a cellphone camera, is configured to obtain image data on mura of the mobile device 67. A commercially available camera may have a resolution of approximately 1.2 mega pixels or higher, which is sufficient to support the system 60. In operation, the mobile device 67 is powered on for the camera 61 to take a picture of an image displayed by the mobile device 67. The system 60 alleviates optical interference from ambient light, and facilitates adjustments in the x, y and z coordinates to ensure the quality of image data on mura.
  • FIG. 6B is a schematic block diagram showing a method of updating image data on mura, in accordance with some embodiments.
  • Referring to FIG. 6B, real-time image data on mura 62 obtained by the camera 61 is sent to the mobile device 67. In the present embodiment, a processor 64 on a main board of the mobile device 67 receives the real-time image on mura 62 and determines non-uniform illumination regions, if any, in the display of the mobile device 67. The real-time image on mura 62 is then stored via a driver IC 66 into a memory 68 such as a flash IC, and may update an original image data on mura 680 in the memory 68. In an embodiment, the original image data on mura 680 refers to one that has been stored in the memory 68 by a manufacturer when the mobile device 67 was made. In another embodiment, the original image data on mum 680 refers to a previously stored real-time image data on mura. The original image data on mura 680, in particular those stored by the manufacturer, may not reflect the current state of mura when the mobile device 67 has been used for a while. As a result, the current state of mura may be significantly different from the state originally stored. With the updated image data on mura, a more precise compensation can be made for pixels in a non-uniform illumination region.
  • FIG. 7 is a flow diagram of a method for current compensation in an electroluminescent (EL) display, in accordance with some embodiments.
  • Referring to FIG. 7, the method is similar to that illustrated in FIG. 1 except, for example, operations 71, 72 and 73. In operation 71, real-time image data on mura of a mobile device is obtained. Next, in operation 72, the real-time image data on mura is stored in a memory of the mobile device and updates an original image data on mura. Subsequently, in operation 73, it is determined if current distribution is uniform. In an embodiment, to determine if current distribution is uniform, the real-time image data on mura is compared against the original image data on mura. Based on a comparison result, it can be determined whether the intensity of light of a pixel unit in an illumination region relative to the real-time image data on mura is changed. Accordingly, the intensity of light of the pixel unit is measured by reference to the comparison result in order to determine if current distribution is uniform.
  • In operation 73, if the current distribution is determined to be uniform, then the operations 71 and 72, when necessary, are repeated. If not uniform, a compensation process based on the operations 14 to 18 previously discussed with reference to FIG. 1 may be performed.
  • The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.

Claims (20)

What is claimed is:
1. A method for current compensation in an electroluminescent (EL) display, the method comprising:
measuring an intensity of light of a pixel unit;
identifying a pixel unit to be one that needs compensation if the measured intensity exceeds a predetermined threshold;
determining the magnitude of a compensation current; and
providing an image data corresponding to the magnitude of the compensation current to the identified pixel unit.
2. The method according to claim 1 further comprising:
providing an image data of a predetermined grayscale to a pixel unit under measurement before measuring an intensity of light of the pixel unit.
3. The method according to claim 2, wherein identifying a pixel unit further comprises:
comparing the measured intensity with the predetermined grayscale.
4. The method according to claim 2, wherein determining the magnitude of a compensation current further comprises:
calculating a difference between the measured intensity and the predetermined grayscale; and
converting the difference into the magnitude of a compensation current.
5. The method according to claim 1 further comprising:
determining the location of the identified pixel unit.
6. The method according to claim 5, wherein the pixel unit is driven by a gate driver integrated circuit (IC) and a source driver IC, further comprising:
providing information on the location of the identified pixel unit to the gate driver IC; and
providing information on the magnitude of a compensation current to the source driver IC.
7. A method for current compensation, the method comprising:
obtaining real-time image data on mura of a display of a mobile device;
storing the real-time image data on mura in a memory of the mobile device; and
determining pixels that need compensation based on the real-time image data on mura.
8. The method according to claim 7, wherein obtaining real-time image data on mura of a display of a mobile device comprises:
taking a picture of an image displayed by the display of the mobile device.
9. The method according to claim 7 further comprising:
updating in the memory an original image data on mura with the real-time image data on mura.
10. The method according to claim 9, wherein the original image data on mura is stored in the memory when the mobile device is manufactured.
11. The method according to claim 9, wherein the original image data on mura includes a previously stored image data on mura.
12. The method according to claim 7, wherein the memory includes a flash IC.
13. An electroluminescent (EL) display, comprising:
a substrate;
an EL device layer over the substrate, the EL device layer including a number of EL devices; and
an optical sensor layer over the substrate, the optical sensor layer including first sensors arranged in a first direction and second sensors arranged in a second direction, the first sensors and the second sensors intersecting one another at intersection points,
wherein the optical sensor layer is configured to identify a region of the EL device layer for compensation by detecting impedance at each intersection point from a reference point.
14. The EL display according to claim 13, wherein the substrate includes one of a low temperature polysilicon (LTPS) substrate and an indium gallium zinc oxide (IGZO) substrate.
15. The EL display according to claim 13, wherein the EL device includes one of an organic light emitting diode (OLED), a micro LED and a quantum dot LED (QLED).
16. The EL display according to claim 13, wherein the optical sensor layer has a same size as the substrate.
17. The EL display according to claim 13, wherein the optical sensor layer 33 is made of a relatively high transparent material.
18. The EL display according to claim 13 further comprising a measuring module configured to measure an intensity of light of an EL device.
18. EL display according to claim 18 further comprising an analyzing module configured to identify an EL device to be one that needs compensation if the measured intensity exceeds a predetermined threshold.
20. The EL display according to claim 19 further comprising a calculating module configured to determine the magnitude of a compensation current for the identified EL device.
US15/811,337 2016-11-14 2017-11-13 Method and device for current compensation for an electroluminescent display Abandoned US20180137812A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US201662421435P true 2016-11-14 2016-11-14
US15/811,337 US20180137812A1 (en) 2016-11-14 2017-11-13 Method and device for current compensation for an electroluminescent display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/811,337 US20180137812A1 (en) 2016-11-14 2017-11-13 Method and device for current compensation for an electroluminescent display

Publications (1)

Publication Number Publication Date
US20180137812A1 true US20180137812A1 (en) 2018-05-17

Family

ID=62108012

Family Applications (7)

Application Number Title Priority Date Filing Date
US15/439,420 Active 2037-11-18 US10431142B2 (en) 2016-11-14 2017-02-22 Pixel circuit and electroluminescent display comprising the pixel circuit
US15/439,547 Active US10535297B2 (en) 2016-11-14 2017-02-22 Display comprising an irregular-shape active area and method of driving the display
US15/439,500 Active 2037-08-15 US10475371B2 (en) 2016-11-14 2017-02-22 Pixel circuit in an electroluminescent display
US15/440,543 Active 2037-06-05 US10210790B2 (en) 2016-11-14 2017-02-23 Pixel units comprising a compensation circuit and electroluminescent display comprising the pixel units
US15/680,751 Active US10600351B2 (en) 2016-11-14 2017-08-18 Semiconductor device having a multi-terminal transistor layout
US15/702,804 Abandoned US20180137807A1 (en) 2016-11-14 2017-09-13 Circuit for voltage compensation in an electroluminescent display
US15/811,337 Abandoned US20180137812A1 (en) 2016-11-14 2017-11-13 Method and device for current compensation for an electroluminescent display

Family Applications Before (6)

Application Number Title Priority Date Filing Date
US15/439,420 Active 2037-11-18 US10431142B2 (en) 2016-11-14 2017-02-22 Pixel circuit and electroluminescent display comprising the pixel circuit
US15/439,547 Active US10535297B2 (en) 2016-11-14 2017-02-22 Display comprising an irregular-shape active area and method of driving the display
US15/439,500 Active 2037-08-15 US10475371B2 (en) 2016-11-14 2017-02-22 Pixel circuit in an electroluminescent display
US15/440,543 Active 2037-06-05 US10210790B2 (en) 2016-11-14 2017-02-23 Pixel units comprising a compensation circuit and electroluminescent display comprising the pixel units
US15/680,751 Active US10600351B2 (en) 2016-11-14 2017-08-18 Semiconductor device having a multi-terminal transistor layout
US15/702,804 Abandoned US20180137807A1 (en) 2016-11-14 2017-09-13 Circuit for voltage compensation in an electroluminescent display

Country Status (3)

Country Link
US (7) US10431142B2 (en)
CN (7) CN108074529A (en)
TW (7) TWI637506B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020076930A1 (en) * 2018-10-11 2020-04-16 Roku, Inc. Post-production de-mura of a television using a mobile device
CN111326124A (en) * 2020-04-03 2020-06-23 Tcl华星光电技术有限公司 Display device driving method and display device

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170039052A (en) * 2015-09-30 2017-04-10 엘지디스플레이 주식회사 Organic Light Emitting Diode Display
US10431142B2 (en) * 2016-11-14 2019-10-01 Int Tech Co., Ltd. Pixel circuit and electroluminescent display comprising the pixel circuit
CN108062932B (en) * 2017-12-20 2020-05-26 北京航空航天大学 Pixel circuit with organic thin film transistor structure
US10423286B1 (en) * 2018-03-09 2019-09-24 Int Tech Co., Ltd. Circuit for fingerprint sensing and electronic device comprising the circuit
CN110867160A (en) * 2018-08-27 2020-03-06 上海和辉光电有限公司 Pixel circuit, driving method thereof and display panel
CN109147673B (en) * 2018-09-19 2020-08-14 京东方科技集团股份有限公司 Pixel circuit, driving method thereof and display device
TWI671727B (en) * 2018-10-05 2019-09-11 友達光電股份有限公司 Display panel
TWI696993B (en) * 2019-05-17 2020-06-21 友達光電股份有限公司 Pixel circuit
CN110534059A (en) * 2019-08-30 2019-12-03 昆山国显光电有限公司 OLED pixel structure and display device
TWI693589B (en) * 2019-09-16 2020-05-11 友達光電股份有限公司 Pixel circuit
CN110782854B (en) * 2019-10-08 2020-09-08 深圳市华星光电半导体显示技术有限公司 Electronic equipment and reading mode identification method thereof
TWI714317B (en) * 2019-10-23 2020-12-21 友達光電股份有限公司 Pixel circuit and display device having the same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030201727A1 (en) * 2002-04-23 2003-10-30 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and production system of the same
US20050041002A1 (en) * 2001-09-07 2005-02-24 Hiroshi Takahara El display panel, its driving method, and el display apparatus
US20070097045A1 (en) * 2005-10-28 2007-05-03 Samsung Electronics Co., Ltd. Display apparatus having LED backlight and brightness adjusting method for the same
US20080036703A1 (en) * 2006-08-11 2008-02-14 Tpo Displays Corp. System and method for reducing mura defects
US20090135211A1 (en) * 2007-11-26 2009-05-28 Tpo Displays Corp. Image displaying system and method for eliminating mura defect
US20110012908A1 (en) * 2009-07-20 2011-01-20 Sharp Laboratories Of America, Inc. System for compensation of differential aging mura of displays
US8743215B1 (en) * 2012-12-13 2014-06-03 Lg Display Co., Ltd. Mura detection apparatus and method of display device
US20160071464A1 (en) * 2014-09-10 2016-03-10 Lg Display Co., Ltd. Organic Light Emitting Display Device
US20160163252A1 (en) * 2014-12-09 2016-06-09 Megachips Corporation Image display device, correction data generation method, and image correction device and method, as well as image correction system

Family Cites Families (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3235540B2 (en) 1997-10-08 2001-12-04 日本電気株式会社 Thin film transistor array for liquid crystal display device and method of manufacturing the same
US5965925A (en) * 1997-10-22 1999-10-12 Artisan Components, Inc. Integrated circuit layout methods and layout structures
US6601224B1 (en) * 1999-08-30 2003-07-29 Intel Corporation Layout to minimize gate orientation related skew effects
KR100767377B1 (en) 2001-09-28 2007-10-17 삼성전자주식회사 Organic electroluminescence display panel and display apparatus using thereof
JP4202012B2 (en) 2001-11-09 2008-12-24 株式会社半導体エネルギー研究所 Light emitting device and current memory circuit
US20050030912A1 (en) * 2002-08-22 2005-02-10 Enikia L.L.C. Use of hybrid (HW/DSP/MCU/SW) architectures for powerline OFDM communication field
GB0220614D0 (en) 2002-09-05 2002-10-16 Koninkl Philips Electronics Nv Electroluminescent display devices
US6971470B2 (en) 2003-07-31 2005-12-06 The Raymond Corporation Control system for material handling vehicle with dual control handles
US7038392B2 (en) * 2003-09-26 2006-05-02 International Business Machines Corporation Active-matrix light emitting display and method for obtaining threshold voltage compensation for same
JP2005250448A (en) 2004-02-05 2005-09-15 Sharp Corp Electronic element, display element, and manufacturing method therefor
US6977470B2 (en) 2004-04-28 2005-12-20 Au Optronics Corp. Current-driven OLED pixel
KR100698681B1 (en) * 2004-06-29 2007-03-23 삼성에스디아이 주식회사 Light emitting display device
US7907137B2 (en) 2005-03-31 2011-03-15 Casio Computer Co., Ltd. Display drive apparatus, display apparatus and drive control method thereof
KR101139527B1 (en) 2005-06-27 2012-05-02 엘지디스플레이 주식회사 Oled
KR100685844B1 (en) * 2005-08-26 2007-02-22 삼성에스디아이 주식회사 Both-sides emitting organic electroluminescence display device and driving method of the same
US7750964B2 (en) * 2005-09-30 2010-07-06 Sony Corporation Method and apparatus for driving a semiconductor device including driving of signal charges within and outside an effective transfer period
JP2007335808A (en) * 2006-06-19 2007-12-27 Matsushita Electric Ind Co Ltd Semiconductor device
KR100821055B1 (en) 2006-12-27 2008-04-08 삼성에스디아이 주식회사 Organic light emitting diodes display device and method of the same
JP4518199B2 (en) 2007-10-23 2010-08-04 エプソンイメージングデバイス株式会社 Electro-optic device
JP5641273B2 (en) 2008-05-11 2014-12-17 Nltテクノロジー株式会社 Non-rectangular pixel array and display device including the array
KR100968401B1 (en) * 2008-10-16 2010-07-07 한국과학기술원 Driving apparatus for display
US20100171569A1 (en) * 2008-11-18 2010-07-08 Ecole Polytechnique Federale De Lausanne (Epfl) Active double or multi gate micro-electro-mechanical device with built-in transistor
KR101535929B1 (en) 2008-12-02 2015-07-10 삼성디스플레이 주식회사 Display substrate, display panel having the display substrate and display apparatus having the display panel
KR100986896B1 (en) * 2008-12-05 2010-10-08 삼성모바일디스플레이주식회사 Organic Light Emitting Display Device and Driving Method Thereof
WO2010100938A1 (en) * 2009-03-06 2010-09-10 パナソニック株式会社 Image display apparatus and driving method therefor
KR101073353B1 (en) * 2009-10-19 2011-10-14 삼성모바일디스플레이주식회사 Pixel and organic light emitting display device using the same
KR101201722B1 (en) 2010-02-23 2012-11-15 삼성디스플레이 주식회사 Organic light emitting display and driving method thereof
KR101073281B1 (en) * 2010-05-10 2011-10-12 삼성모바일디스플레이주식회사 Organic light emitting display device and driving method thereof
US8390078B2 (en) * 2010-06-10 2013-03-05 Taiwan Semiconductor Manufacturing Company, Ltd. Quadrangle MOS transistors
KR101683215B1 (en) * 2010-08-10 2016-12-07 삼성디스플레이 주식회사 Organic Light Emitting Display Device and Driving Method Thereof
TW201218163A (en) 2010-10-22 2012-05-01 Au Optronics Corp Driving circuit for pixels of an active matrix organic light-emitting diode display and method for driving pixels of an active matrix organic light-emitting diode display
TWI415076B (en) 2010-11-11 2013-11-11 Au Optronics Corp Pixel driving circuit of an organic light emitting diode
KR20120065716A (en) * 2010-12-13 2012-06-21 삼성모바일디스플레이주식회사 Display device and driving method thereof
KR101839533B1 (en) * 2010-12-28 2018-03-19 삼성디스플레이 주식회사 Organic light emitting display device, driving method for the same, and method for manufacturing the same
TW201316315A (en) 2011-10-05 2013-04-16 Wintek Corp Light-emitting component driving circuit and related pixel circuit and applications using the same
KR20130046006A (en) * 2011-10-27 2013-05-07 삼성디스플레이 주식회사 Pixel circuit, organic light emitting display device having the same, and method of driving organic light emitting display device
US10026734B2 (en) * 2011-11-15 2018-07-17 X-Fab Semiconductor Foundries Ag MOS device assembly
US9454932B2 (en) 2011-11-24 2016-09-27 Joled Inc. Display device and method of controlling the same
CN103295519B (en) 2012-03-05 2015-11-04 群康科技(深圳)有限公司 Display and driving pixels approach
TWI459352B (en) 2012-06-13 2014-11-01 Innocom Tech Shenzhen Co Ltd Displays
CN102855856B (en) * 2012-08-30 2016-04-13 南京中电熊猫液晶显示科技有限公司 A kind of driving method and liquid crystal display thereof eliminating liquid crystal display Mura
US9076357B2 (en) * 2012-11-16 2015-07-07 Apple Inc. Redundant operation of a backlight unit of a display device under a shorted LED condition
CN103489399B (en) 2012-11-21 2015-09-02 友达光电股份有限公司 El pixel circuit
CN103137069A (en) 2012-11-21 2013-06-05 友达光电股份有限公司 Pixel circuit
KR101360768B1 (en) 2012-11-27 2014-02-10 엘지디스플레이 주식회사 Organic light emitting diode display device and method for driving the same
US9070648B2 (en) 2012-11-27 2015-06-30 Apple Inc. Electronic devices with display-integrated light sensors
KR102005052B1 (en) 2012-12-03 2019-07-31 삼성디스플레이 주식회사 Error Compensation part and Organic Light Emitting Display Device Using the same
KR101411621B1 (en) 2012-12-24 2014-07-02 엘지디스플레이 주식회사 Organic light emitting diode display device and method for driving the same
KR101985501B1 (en) * 2013-01-08 2019-06-04 삼성디스플레이 주식회사 Pixel, diplay device comprising the pixel and driving method of the diplay device
CN103150991A (en) 2013-03-14 2013-06-12 友达光电股份有限公司 Pixel compensation circuit for AMOLED (Active Matrix/Organic Light Emitting Diode) displayer
KR102030632B1 (en) 2013-04-22 2019-10-14 삼성디스플레이 주식회사 Organic Light Emitting Display and Driving Method Thereof
US9437137B2 (en) * 2013-08-12 2016-09-06 Ignis Innovation Inc. Compensation accuracy
CN103474022A (en) * 2013-08-22 2013-12-25 京东方科技集团股份有限公司 Pixel circuit, pixel circuit driving method, array baseplate and display device
CN104518024A (en) * 2013-10-08 2015-04-15 立锜科技股份有限公司 Metal oxide semiconductor component and manufacturing method thereof
TWI498873B (en) 2013-12-04 2015-09-01 Au Optronics Corp Organic light-emitting diode circuit and driving method thereof
US20170018224A1 (en) * 2013-12-10 2017-01-19 Neoview Kolon Co., Ltd. Apparatus and method for compensating for luminance difference of organic light-emitting display device
WO2015168954A1 (en) * 2014-05-09 2015-11-12 深圳市华星光电技术有限公司 Pixel drive circuit and drive method therefor and display panel
CN104008726B (en) * 2014-05-20 2016-05-04 华南理工大学 The image element circuit of active organic electroluminescent display and driving method thereof
TWI515712B (en) 2014-05-28 2016-01-01 友達光電股份有限公司 Pixel driving circuit
CN104036726B (en) * 2014-05-30 2015-10-14 京东方科技集团股份有限公司 Image element circuit and driving method, OLED display panel and device
CN104064139B (en) * 2014-06-05 2016-06-29 上海天马有机发光显示技术有限公司 A kind of organic light-emitting diode pixel compensates circuit, display floater and display device
CN105206222B (en) 2014-06-20 2018-06-19 上海和辉光电有限公司 Oled pixel compensation circuit and oled pixel driving method
CN104091563B (en) * 2014-06-27 2016-03-09 京东方科技集团股份有限公司 Image element circuit and driving method, organic electroluminescence display panel and display device
CN104064148B (en) * 2014-06-30 2017-05-31 上海天马微电子有限公司 A kind of image element circuit, organic EL display panel and display device
CN105280136B (en) * 2014-07-10 2018-11-30 信利半导体有限公司 A kind of AMOLED pixel circuit and its driving method
CN105336292B (en) 2014-07-16 2018-02-23 上海和辉光电有限公司 Oled pixel compensation circuit and oled pixel driving method
US10074310B2 (en) * 2014-10-06 2018-09-11 Joled Inc. Display device and display device control method
TWI533278B (en) 2014-10-31 2016-05-11 友達光電股份有限公司 Pixel structure and driving method thereof
CN104318902B (en) * 2014-11-19 2017-05-31 上海天马有机发光显示技术有限公司 The image element circuit and driving method of OLED, OLED
CN104575377A (en) 2014-12-22 2015-04-29 昆山国显光电有限公司 Pixel circuit and driving method thereof as well as active matrix organic light emitting display
CN104409051A (en) * 2014-12-24 2015-03-11 京东方科技集团股份有限公司 Pixel circuit, organic electroluminescent display panel and display device
KR20160082207A (en) 2014-12-31 2016-07-08 삼성디스플레이 주식회사 Circle display and driving method thereof
KR20160092595A (en) 2015-01-27 2016-08-05 삼성디스플레이 주식회사 Circle display and driving method thereof
CN104575393B (en) * 2015-02-03 2017-02-01 深圳市华星光电技术有限公司 AMOLED (active matrix organic light emitting display) pixel driving circuit and pixel driving method
KR20160101825A (en) 2015-02-17 2016-08-26 삼성디스플레이 주식회사 Stretchable display device and fabricating method of the same
US9997105B2 (en) * 2015-03-26 2018-06-12 Boe Technology Group Co., Ltd. OLED pixel driving circuit and driving method and OLED display apparatus
CN104700778B (en) * 2015-03-27 2017-06-27 深圳市华星光电技术有限公司 AMOLED pixel-driving circuits and image element driving method
KR20170000662A (en) * 2015-06-24 2017-01-03 삼성전자주식회사 pixel circuit, Method for driving the pixel circuit and Organic light emitting display
CN104916257A (en) 2015-07-15 2015-09-16 京东方科技集团股份有限公司 Pixel circuit, drive method thereof, display panel and display device
CN105470264A (en) * 2015-12-08 2016-04-06 上海中航光电子有限公司 Array substrate and display panel
KR20170074618A (en) * 2015-12-22 2017-06-30 엘지디스플레이 주식회사 Sub-pixel of organic light emitting display device and organic light emitting display device including the same
CN105427803B (en) 2016-01-04 2018-01-02 京东方科技集团股份有限公司 Pixel-driving circuit, method, display panel and display device
KR20170118990A (en) * 2016-04-15 2017-10-26 삼성디스플레이 주식회사 Pixel circuit and method of driving the same
CN106205494B (en) * 2016-09-09 2019-05-31 深圳市华星光电技术有限公司 AMOLED pixel-driving circuit and image element driving method
US10431142B2 (en) * 2016-11-14 2019-10-01 Int Tech Co., Ltd. Pixel circuit and electroluminescent display comprising the pixel circuit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050041002A1 (en) * 2001-09-07 2005-02-24 Hiroshi Takahara El display panel, its driving method, and el display apparatus
US20030201727A1 (en) * 2002-04-23 2003-10-30 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and production system of the same
US20070097045A1 (en) * 2005-10-28 2007-05-03 Samsung Electronics Co., Ltd. Display apparatus having LED backlight and brightness adjusting method for the same
US20080036703A1 (en) * 2006-08-11 2008-02-14 Tpo Displays Corp. System and method for reducing mura defects
US20090135211A1 (en) * 2007-11-26 2009-05-28 Tpo Displays Corp. Image displaying system and method for eliminating mura defect
US20110012908A1 (en) * 2009-07-20 2011-01-20 Sharp Laboratories Of America, Inc. System for compensation of differential aging mura of displays
US8743215B1 (en) * 2012-12-13 2014-06-03 Lg Display Co., Ltd. Mura detection apparatus and method of display device
US20160071464A1 (en) * 2014-09-10 2016-03-10 Lg Display Co., Ltd. Organic Light Emitting Display Device
US20160163252A1 (en) * 2014-12-09 2016-06-09 Megachips Corporation Image display device, correction data generation method, and image correction device and method, as well as image correction system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020076930A1 (en) * 2018-10-11 2020-04-16 Roku, Inc. Post-production de-mura of a television using a mobile device
US10638125B1 (en) 2018-10-11 2020-04-28 Roku, Inc. Post-production de-mura of a television using a mobile device
CN111326124A (en) * 2020-04-03 2020-06-23 Tcl华星光电技术有限公司 Display device driving method and display device

Also Published As

Publication number Publication date
US10210790B2 (en) 2019-02-19
CN108074534A (en) 2018-05-25
US20180138276A1 (en) 2018-05-17
CN108074531B (en) 2020-05-22
US20180137816A1 (en) 2018-05-17
TW201818386A (en) 2018-05-16
TW201834247A (en) 2018-09-16
CN108074922B (en) 2020-07-03
US20180137815A1 (en) 2018-05-17
CN108074537A (en) 2018-05-25
TWI627620B (en) 2018-06-21
TW201830370A (en) 2018-08-16
CN108074535A (en) 2018-05-25
TWI652663B (en) 2019-03-01
US10431142B2 (en) 2019-10-01
TW201833893A (en) 2018-09-16
US20180137800A1 (en) 2018-05-17
TW201818379A (en) 2018-05-16
US10475371B2 (en) 2019-11-12
TW201818387A (en) 2018-05-16
US20180137806A1 (en) 2018-05-17
TW201818539A (en) 2018-05-16
TWI677097B (en) 2019-11-11
CN108074534B (en) 2020-07-03
US20180137807A1 (en) 2018-05-17
CN108074531A (en) 2018-05-25
CN108074530A (en) 2018-05-25
TWI637506B (en) 2018-10-01
CN108074530B (en) 2020-06-30
CN108074529A (en) 2018-05-25
CN108074922A (en) 2018-05-25
US10600351B2 (en) 2020-03-24
TWI649735B (en) 2019-02-01
US10535297B2 (en) 2020-01-14
TWI673693B (en) 2019-10-01
TWI637375B (en) 2018-10-01
CN108074537B (en) 2020-03-10

Similar Documents

Publication Publication Date Title
EP3113163B1 (en) Device and method for sensing threshold voltage of driving tft included in organic light emitting display
US10204557B2 (en) Active-matrix organic light emitting diode (AMOLED) display apparatus and brightness compensation method thereof
US10249239B2 (en) Driving circuit of pixel unit and driving method thereof, and display device
EP2782090B1 (en) Pixel circuits for amoled displays
US10380944B2 (en) Structural and low-frequency non-uniformity compensation
US9721507B2 (en) AMOLED pixel driving circuit and pixel driving method with compensation of threshold voltage changes
US9373281B2 (en) Pixel unit circuit, compensating method thereof and display device
JP6111400B2 (en) Video signal processing circuit, video signal processing method, and display device
US9135862B2 (en) Organic light emitting display device and method for operating the same
US9356088B2 (en) Active matrix organic light-emitting diode display substrate and display device
US9269302B2 (en) Voltage compensable OLED display device
US10074306B2 (en) Remote compensation service method, remote compensation service system, OLED display device, and remote compensation server
WO2015180371A1 (en) Display device brightness compensation method, brightness compensation apparatus, and display device
US9224357B2 (en) Apparatus and method for compensating image of display device
US10365690B2 (en) Flexible display device and method for compensating image of flexible display device
US9001010B2 (en) Flexible display device and method of compensating for luminance of the flexible display device
TWI598866B (en) A data processing device for a display device, a data processing method for the display device and the display device
WO2018072299A1 (en) Amoled pixel driving circuit and driving method
KR102007710B1 (en) Display device
US8890778B2 (en) Display device and method for controlling the same
US20160343304A1 (en) Method of compensating amoled power supply voltage drop
TWI362646B (en) Tft array circuit, display panel, method for inspecting the tft array circuit, and method for manufacturing active matrix oled panel
JP3760411B2 (en) Active matrix panel inspection apparatus, inspection method, and active matrix OLED panel manufacturing method
KR102182129B1 (en) Organic light emitting diode display and drving method thereof
WO2018223702A1 (en) Display panel, pixel compensation circuit and compensation method

Legal Events

Date Code Title Description
AS Assignment

Owner name: INT TECH CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAN, YI WEI;YAN, CHIN-RUNG;LAI, YEN-JEN;SIGNING DATES FROM 20160501 TO 20171108;REEL/FRAME:044112/0524

STCB Information on status: application discontinuation

Free format text: FINAL REJECTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION