WO2019227953A1 - 驱动有机发光显示装置的方法、驱动控制器及显示装置 - Google Patents

驱动有机发光显示装置的方法、驱动控制器及显示装置 Download PDF

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Publication number
WO2019227953A1
WO2019227953A1 PCT/CN2019/072548 CN2019072548W WO2019227953A1 WO 2019227953 A1 WO2019227953 A1 WO 2019227953A1 CN 2019072548 W CN2019072548 W CN 2019072548W WO 2019227953 A1 WO2019227953 A1 WO 2019227953A1
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Prior art keywords
display device
organic light
detection
compensation
emitting display
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PCT/CN2019/072548
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English (en)
French (fr)
Inventor
杨飞
孟松
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京东方科技集团股份有限公司
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Priority to US16/481,796 priority Critical patent/US11341914B2/en
Publication of WO2019227953A1 publication Critical patent/WO2019227953A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/026—Arrangements or methods related to booting a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/027—Arrangements or methods related to powering off a display

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a method for driving an organic light emitting display device, a driving controller, and a display device.
  • the present disclosure provides a method for driving an organic light emitting display device, a driving controller, and a display device.
  • a method for driving an organic light emitting display device includes a plurality of pixel units, and each pixel unit includes a pixel driving circuit and a light emitting element coupled to the pixel driving circuit. Including drive transistor.
  • the method includes:
  • the startup phase of the organic light emitting display device determine whether it is necessary to perform a startup detection on the display compensation parameters of the organic light emitting display device;
  • the display compensation parameters of the organic light-emitting display device are turned on and tested to obtain new compensation parameter values.
  • the display compensation parameter includes at least one of an electrical compensation parameter and an optical compensation parameter.
  • the electrical compensation parameter includes a threshold voltage and / or mobility of a driving transistor of each pixel unit, and / or a threshold voltage of a light emitting element of each pixel unit.
  • the optical compensation parameters include a brightness lookup table and a brightness fitting parameter for each pixel unit.
  • the display compensation parameter of the organic light emitting display device when the display compensation parameter of the organic light emitting display device is powered on and detected, the display compensation parameter further includes an environmental compensation parameter, and the environmental compensation parameter includes an ambient light parameter, a user's viewing distance, and the current brightness of the organic light emitting display device. At least one.
  • judging whether the display compensation parameter of the organic light emitting display device needs to be turned on and detected includes: judging whether it is based on at least one of a standstill time after turning off, a temperature difference value between turning on and the last turning off, and a cumulative display time of the stage Perform a power-on test.
  • the shutdown operation further includes: acquiring and storing at least one of an ambient temperature, a panel temperature, and a circuit board temperature at the time of shutdown.
  • the booting operation further includes: acquiring at least one of an ambient temperature at the time of booting, a panel temperature of the organic light emitting display device, and a circuit board temperature of the organic light emitting display device; The corresponding difference between at least one of the circuit board temperature and at least one of the ambient temperature, the panel temperature, and the circuit board temperature at the time of the last shutdown.
  • determining whether to perform shutdown detection on the organic light emitting display device includes: determining whether to perform shutdown detection according to at least one of the cumulative display time and the single display time of the stage.
  • the shutdown operation further comprises: leaving the organic light emitting display device on a black screen for a period of time before performing the shutdown detection on the organic light emitting display device. For example, depending on the running time, let it stand still for 30 seconds to 10 minutes with a black screen.
  • the foregoing method further includes: performing real-time compensation detection on the organic light-emitting display device during the display operation stage, and performing compensation display on the display data based on the display compensation parameters detected in real time.
  • the foregoing method further includes: using the stored display compensation parameter to perform a startup compensation display when the display compensation parameter of the organic light emitting display device is not required to be powered on and detected.
  • a driving controller for an organic light emitting display device includes a plurality of pixel units, and each pixel unit includes a pixel driving circuit and a light emitting element coupled to the pixel driving circuit.
  • the pixel driving circuit includes a driving transistor, and the organic light emitting display device further includes a compensation detection circuit for detecting a display compensation parameter.
  • the drive controller includes:
  • a first detection and judging circuit configured to determine whether the display compensation parameters of the organic light-emitting display device need to be started-up and detected during the startup operation phase of the organic light-emitting display device;
  • a second detection and judging circuit configured to determine whether the organic light emitting display device needs to be shut down and detected during the shutdown operation phase of the organic light emitting display device;
  • a compensation detection control circuit configured to control the compensation detection circuit to perform a startup detection or a shutdown detection to obtain a new compensation parameter value according to a judgment result of the first detection judgment circuit or the second detection judgment circuit;
  • the compensation driving circuit is used to perform display compensation during startup according to the existing display compensation parameters or new compensation parameter values;
  • Memory access circuit for accessing external memory.
  • the driving controller further includes an external detection data acquisition circuit for acquiring external environment detection data.
  • the drive controller is integrated in a timing controller.
  • the first detection and judgment circuit is configured to determine whether to perform the startup detection based on at least one of a standstill time for shutdown, a temperature difference value during startup and shutdown, and a cumulative display time of the stage.
  • the second detection and judgment circuit is configured to determine whether to perform a shutdown detection based on at least one of the cumulative display time of the stage and the single display time.
  • the compensation driving circuit is further configured to perform real-time compensation detection on the organic light-emitting display device during the display operation stage, and perform compensation display on the display data based on the display compensation parameters detected in real time.
  • a display device includes a plurality of pixel units. Each pixel unit includes a pixel driving circuit and a light emitting element coupled to the pixel driving circuit.
  • the pixel driving circuit includes a driving transistor.
  • the display device has a compensation detection circuit.
  • the display device further includes: any one of the foregoing drive controllers; and a memory for storing data related to display compensation.
  • the display device further includes a temperature sensor for acquiring at least one of an ambient temperature, a panel temperature of the organic light emitting display device, and a circuit board temperature of the organic light emitting display device.
  • FIG. 1A illustrates an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 1B illustrates an exemplary driving circuit of a pixel unit
  • FIG. 1C shows a driving circuit with a detection module as an example
  • FIG. 2 illustrates a flowchart of a method of driving an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 3 illustrates a startup detection flowchart of an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 4 illustrates a shutdown detection flowchart of an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 5 illustrates a driving controller for an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 6 illustrates an organic light emitting display device according to an exemplary embodiment of the present disclosure
  • FIG. 7 illustrates a data update method according to an exemplary embodiment of the present disclosure.
  • the characteristics of the driving TFT will be greatly different when it is left for a long time, when it is operated for a long time, or when the temperature is greatly different.
  • the threshold voltage parameter of the driving TFT will drift forward (become larger) after long-term operation; the threshold voltage parameter of the driving TFT will drift (become negative) after long-term operation.
  • the phenomenon of long-term driving and long-term standing due to changes in the characteristics of the driving TFT during startup, uneven brightness, darkening, and afterimages will affect the image quality.
  • the mobility ⁇ parameter of the driving TFT becomes larger; when the temperature decreases, the mobility ⁇ parameter of the driving TFT becomes smaller.
  • the characteristics of the driving TFT change greatly, which may cause uneven brightness and darkness of the screen of the OLED display device, and reduce the quality of the screen.
  • the inventor has found that, although the compensation detection scheme during startup and shutdown can improve the display quality, there is a problem that the detection time affects the user experience. For example, the compensation detection operation at the time of turning on may take 2 seconds or more, and the sensing operation at the time of turning off may perform 30 seconds or more. Sometimes this can cause unpleasant waits for users.
  • the inventors also found that power-on and power-off detection are not necessary in all cases. For example, when the user uses the frequency frequently but does not use it for a long time each time, the display compensation parameter may not change much.
  • the inventor of the present application proposes a solution to selectively perform compensation detection during the startup and shutdown phases, thereby improving the display quality and improving the user experience.
  • the technical solutions of the embodiments of the present disclosure are described in detail below.
  • FIG. 1A illustrates an organic light emitting display device according to an exemplary embodiment of the present disclosure.
  • the organic light emitting display device 100 includes a timing controller 110, a data driver 120, a control and scan driver 130, and a pixel array 140.
  • the pixel array 140 has a plurality of pixel units 150.
  • Each pixel unit 150 includes a driving circuit and a light emitting element (not shown) coupled to the driving circuit.
  • Each driving circuit includes a driving transistor.
  • the plurality of pixel units 150 are connected to the scan lines S1 to Sn, the data lines D1 to Dm, the light emission control lines E1 to En, the first power source ELVDD, and the second power source ELVSS, respectively.
  • the control and scan driver 130 is used to sequentially supply scanning signals to the scanning lines S1 to Sn and to provide lighting control signals to the lighting control lines E1 to En.
  • the data driver 120 is used to provide data signals to the data lines D1 to Dm.
  • a scanning signal When a scanning signal is sequentially supplied to a scanning line, a row of pixel units connected to the scanning line is selected. Accordingly, the selected pixel unit receives a data signal (data voltage) from the data line.
  • the data voltage controls the current flowing from the power source ELVDD to the OLED, thereby controlling the OLED to generate light having a corresponding brightness, and thereby displaying an image.
  • the light emitting duration of the pixel unit is controlled by a light emitting control signal.
  • the data driver 120 and the control and scan driver 130 are controlled by the timing controller 110.
  • the timing controller 110 may provide a data drive control signal to the data driver 120 and a scan drive control signal and a light emission drive control signal to the control and scan driver 130.
  • the organic light emitting display device 100 further includes a compensation detection circuit (not shown) that detects a display compensation parameter.
  • the driving circuit may include a detection circuit for detecting a threshold voltage and / or mobility of the driving transistor, as is well known to those skilled in the art.
  • FIG. 1A It is easy to understand that the display device shown and described in FIG. 1A is merely exemplary and is not intended to limit the present disclosure.
  • FIG. 1B illustrates an exemplary driving circuit of a pixel unit.
  • a driving circuit for a pixel unit includes a driving transistor T1, a switching transistor T2, and a capacitor C1.
  • the data line Dm is electrically connected to the input terminal of the switching transistor T2
  • the scanning line Sn is electrically connected to the control terminal of the switching transistor T2
  • the output terminal of the switching transistor is electrically connected to the control terminal of the driving transistor T1.
  • the first power source VDD is electrically connected to the input terminal of the driving transistor
  • the light-emitting element OLED is electrically connected between the output terminal of the driving transistor T1 and the second power source VSS.
  • the current flowing through the driving transistor T1 can be determined by the following formula:
  • V th is the threshold voltage of the driving transistor T1
  • V gs is the voltage difference across the capacitor C1
  • ⁇ is the mobility of the driving transistor T1.
  • the threshold voltage and mobility of different driving transistors will have certain differences, resulting in current differences and brightness differences in OLED display devices.
  • the threshold voltage and mobility of the driving transistor during the use of the OLED will also drift and change, resulting in differences in display brightness between different parts.
  • the threshold voltage and / or brightness of different parts of the light-emitting element may also differ, which affects the user's perception experience.
  • compensation methods can be divided into internal compensation and external compensation.
  • Internal compensation refers to a method of compensating a sub-circuit constructed by a thin film transistor inside a pixel.
  • External compensation refers to the method of detecting electrical or optical compensation parameters through a detection circuit or device and then performing compensation.
  • FIG. 1C shows a driving circuit having a detection module as an example.
  • the driving circuit is basically the same as the circuit shown in FIG. 1B, but a detection transistor T3 is added.
  • the detection transistor T3 is used to control the on and off between the sensing line SL and the S terminal of the driving transistor T1.
  • the first terminal, the second terminal, and the control terminal can be electrically coupled to the first node driving transistor T1.
  • the S terminal, the sensing line SL, and the control line GL2 are turned on and off under the control of a control signal from the control line GL2 to detect compensation parameters such as a threshold voltage and / or mobility of the driving transistor.
  • optical compensation parameters such as a brightness lookup table and a brightness fitting parameter.
  • the optical compensation parameters may include a brightness lookup table, which reflects the correspondence between the ideal brightness and the converted brightness.
  • Optical compensation parameters include, but are not limited to, a brightness lookup table and fitting parameters.
  • the compensation display can be performed as follows.
  • the first conversion brightness corresponding to the first display data is acquired through a brightness lookup table. Then, according to the first converted brightness and brightness fitting parameters, the second display data is obtained:
  • L2 represents the second display data
  • L1 represents the first converted brightness
  • k1 and k2 represent brightness fitting parameters.
  • the third display data is obtained:
  • L3 represents the third display data
  • V th is the threshold voltage of the driving transistor
  • ⁇ is the mobility of the driving transistor.
  • FIG. 2 illustrates a flowchart of a method of driving an organic light emitting display device according to an exemplary embodiment of the present disclosure.
  • the compensation detection is selectively performed during the startup and shutdown phases. The method shown in FIG. 2 is described in detail below.
  • S210 it is determined whether the display compensation parameter of the organic light-emitting display device needs to be started-up and detected during the startup operation phase of the organic light-emitting display device. If the judgment result is yes, go to S220; otherwise, go to S240.
  • power-on detection is not necessary in all cases. For example, when the user uses the frequency frequently but does not use it for a long time each time, the display compensation parameter may not change much, and it is not necessary to perform the power-on detection each time.
  • whether to perform the power-on detection may be determined according to at least one of a power-down rest time, a temperature difference value at power-on and power-off, and a cumulative display time of a stage.
  • the shutdown inactivity time is greater than a threshold (for example, 12 hours).
  • the shutdown idle time is the time that has elapsed since the last shutdown. If the judgment result is yes, the power-on detection is performed; if the judgment result is no, the power-on detection is not performed or other judgments are performed.
  • a threshold for example, 10 degrees Celsius
  • the cumulative display time of the stage is greater than a threshold (for example, 120 hours).
  • the cumulative display time of the stage is the cumulative display running time since the last power-on test or shutdown test. If the judgment result is yes, the power-on detection is performed; if the judgment result is no, the power-on detection is not performed or other judgments are performed. If the threshold is set to zero, it means that if no shutdown detection was performed during the last shutdown, the startup detection is performed.
  • At least one of an ambient temperature at startup, a panel temperature of the organic light-emitting display device, and a circuit board temperature of the organic light-emitting display device may be obtained, and then the detected ambient temperature, panel temperature, and circuit at startup Corresponding difference values between at least one of the board temperature and at least one of the ambient temperature, the panel temperature, and the circuit board temperature at the time of the last shutdown are used to determine whether to perform a startup detection on the display compensation parameter.
  • the ambient temperature at startup can be obtained, and the temperature can be compared with the ambient temperature obtained at the last shutdown, and whether the startup detection is performed according to the obtained difference value (for example, the startup is performed when the difference value is greater than a threshold, such as 5 degrees Celsius). Detection).
  • the panel temperature and / or circuit board temperature at the time of power-on can be obtained, and this temperature can be compared with the panel temperature / circuit board temperature obtained at the last power-off, and the difference value obtained can be used to determine whether to perform the power-on detection (for example, at The difference value is greater than the threshold, such as power-on detection at 10 degrees Celsius).
  • the display compensation parameter may include at least one of an electrical compensation parameter and an optical compensation parameter, but the solution of the embodiment of the present disclosure is not limited thereto. Those skilled in the art can add or use other display compensation parameters as needed.
  • the electrical compensation parameter may include a threshold voltage and / or mobility of a driving transistor of each pixel unit, and / or a threshold voltage of a light emitting element of each pixel unit.
  • the optical compensation parameters include a brightness lookup table and a brightness fitting parameter for each pixel unit.
  • the display compensation parameter may further include an environmental compensation parameter.
  • the environmental compensation parameter may include at least one of an ambient light parameter, a user viewing distance, and a current brightness of the organic light emitting display device.
  • the startup compensation display is performed based on the new compensation parameter value.
  • the startup display data is compensated and displayed with the new compensation parameter value.
  • the stored display compensation parameters are used to perform the startup compensation display.
  • the start-up display data is compensated and displayed according to the display compensation parameters read from the memory.
  • the normal operation display phase is performed.
  • the organic light emitting display device may be subjected to real-time compensation detection, and the display data may be compensated and displayed based on the display compensation parameters detected in real time.
  • S260 it is determined whether or not the shutdown is performed. If the determination result is yes, go to S270; if not, go to S250.
  • shutdown detection is not necessary in all cases. For example, when the user's use time is short, etc., the display compensation parameter may not change much, and it is not necessary to perform shutdown detection every time.
  • whether to perform the shutdown detection may be determined according to at least one of the cumulative display time of the stage and the single display time.
  • a threshold for example, 120 hours. If the judgment result is YES, shutdown detection is performed; if the judgment result is NO, shutdown detection or other judgments are not performed.
  • the single display time is greater than a threshold (for example, 2 hours).
  • the single display time is the elapsed time from the start of the operation to the shutdown. If the judgment result is YES, shutdown detection is performed; if the judgment result is NO, shutdown detection or other judgments are not performed.
  • shutdown detection is performed on the organic light emitting display device to obtain updated compensation parameter values.
  • the display compensation parameter may include at least one of an electrical compensation parameter and an optical compensation parameter.
  • the electrical compensation parameter may include a threshold voltage and / or mobility of a driving transistor of each pixel unit, and / or a threshold voltage of a light emitting element of each pixel unit.
  • the optical compensation parameters include a brightness lookup table and a brightness fitting parameter for each pixel unit.
  • the solution of the embodiment of the present disclosure is not limited thereto. Those skilled in the art can add or use other display compensation parameters as needed.
  • the updated compensation parameter value is stored. According to the embodiment, after the updated compensation parameter is obtained through the shutdown detection, the updated compensation parameter value is stored in the memory for use at the next startup operation.
  • the organic light emitting display device before the organic light emitting display device is turned off, the organic light emitting display device is allowed to stand in a black screen for a period of time to reduce the temperature of the display panel.
  • the stage cumulative display time is cleared.
  • At least one of an ambient temperature, a panel temperature, and a circuit board temperature at the time of shutdown may also be acquired and stored for use at the next startup.
  • FIG. 3 illustrates a startup detection flowchart of an organic light emitting display device according to an exemplary embodiment of the present disclosure. It is easy to understand that this is only an example for explaining the technical idea of the present disclosure, and the technical solution according to the embodiment of the present disclosure is not limited thereto.
  • S310 it is determined whether the shutdown inactivity time is greater than a first threshold T1. If it is greater than T1, go to S350 for power-on detection; if it is less than T1, go to S320 for next level judgment.
  • the temperature data stored in the memory at the time of the last shutdown and the temperature data from the temperature sensor at the time of the startup are compared. If the temperature difference is greater than the set value Ts, go to S350 for power-on detection; if the temperature difference is less than the set value Ts, go to S330 for next level judgment.
  • the cumulative display time is greater than the threshold value Ta. If the cumulative display time is greater than Ta, go to S350 for power-on detection; if the cumulative display time is not greater than Ta, go to S340 for normal power-on display, without power-on detection of display compensation parameters.
  • the threshold value Ta is set to 0, if the cumulative display time is greater than the threshold value Ta, it means that no shutdown detection was performed during the last shutdown, and a power-on detection is required; if the cumulative display time is equal to the threshold value Ta, it means that the shutdown was performed during the last shutdown Detection, normal boot display.
  • FIG. 4 illustrates a shutdown detection flowchart of an organic light emitting display device according to an exemplary embodiment of the present disclosure. It is easy to understand that this is only an example for explaining the technical idea of the present disclosure, and the technical solution according to the embodiment of the present disclosure is not limited thereto.
  • the display device is normally displayed and operated.
  • S412 it is determined whether a shutdown signal is received. If not received, go to S405 to continue displaying. If a shutdown signal is received, go to S445.
  • S415 it is determined whether the cumulative display time is greater than or equal to T3. If yes, go to S420. If not, it means that the accumulated display time is less than T2, and then go to S422.
  • S420 it is determined whether the cumulative display time is equal to a predetermined value T5.
  • the predetermined value T5 may be equal to T3 or a value larger than T3. If the judgment result is yes, go to S430; otherwise, go to S412.
  • S422 it is determined whether a shutdown signal is received. If no shutdown signal is received, go to S405 to continue displaying. If a shutdown signal is received, go to S425.
  • S425 it is determined whether the single display time is greater than a predetermined value T4. If yes, go to S445; otherwise, go to S470.
  • S432 it is determined whether a shutdown signal is received. If no shutdown signal is received, go to S435; otherwise, go to S440.
  • the predetermined value T5 is updated to increase by a predetermined value T7, and then it goes to S420.
  • T5 is reset and restored to the initial predetermined value.
  • a shutdown detection command is sent in preparation for entering shutdown detection.
  • the display device is left for a period of time with a black screen, so that the temperature of the panel, the circuit board and the like is reduced.
  • compensation parameter detection is performed.
  • temperature detection can be performed to obtain temperature data.
  • the memory is updated.
  • FIG. 5 illustrates a driving controller for an organic light emitting display device according to an exemplary embodiment of the present disclosure, which can implement the aforementioned driving method.
  • the organic light emitting display device may be the device described with reference to FIG. 1A or other organic light emitting display devices.
  • the organic light emitting display device includes a plurality of pixel units, and each pixel unit includes a pixel driving circuit and a light emitting element coupled to the pixel driving circuit.
  • the pixel driving circuit includes a driving transistor.
  • the organic light emitting display device further includes a compensation detection circuit for detecting a display compensation parameter, such as a detection module or other detection circuits described with reference to FIG. 1C.
  • the driving controller 500 includes a first detection judgment circuit 505, a second detection judgment circuit 510, a compensation detection control circuit 515, a compensation drive circuit 520, and a memory access circuit 525.
  • the first detection and judging circuit 505 is configured to determine whether the display compensation parameter of the organic light-emitting display device needs to be started-up and detected during the startup operation phase of the organic light-emitting display device.
  • the first detection determination circuit 505 may be configured to determine whether to perform the startup detection based on at least one of a shutdown stand-by time, a temperature difference value during startup and shutdown, and a stage cumulative display time.
  • the display compensation parameter may include at least one of an electrical compensation parameter and an optical compensation parameter, but the solution of the embodiment of the present disclosure is not limited thereto. Those skilled in the art can add or use other display compensation parameters as needed.
  • the electrical compensation parameter may include a threshold voltage and / or mobility of a driving transistor of each pixel unit, and / or a threshold voltage of a light emitting element of each pixel unit.
  • the optical compensation parameters include a brightness lookup table and a brightness fitting parameter for each pixel unit. When the display compensation parameter of the organic light emitting display device is turned on and tested, the display compensation parameter may further include an environmental compensation parameter.
  • the environmental compensation parameter may include at least one of an ambient light parameter, a user viewing distance, and a current brightness of the organic light emitting display device. It is easy to understand that those skilled in the art may also use other or future useful display compensation parameters as needed, and the present disclosure has no limitation on this.
  • the driving controller 500 may receive a user control signal CTRL, and the user control signal CTRL includes data such as a power off / on time difference, a power off command, and the like.
  • the first detection judging circuit 505 can obtain the shutdown inactivity time according to the user control signal CTRL, and determine whether to perform a startup detection on the display compensation parameter according to the user control signal CTRL.
  • the driving controller 500 may further include an external detection data acquisition circuit 530 for acquiring external environment detection data.
  • the external detection data acquisition circuit 530 may receive external sensing data (ESD: external sense data) from an external sensor, such as temperature data such as ambient temperature, panel temperature of the organic light emitting display device, and circuit board temperature of the organic light emitting display device.
  • ESD external sense data
  • the first detection and judgment circuit 505 may compare the temperature data obtained through the external detection data acquisition circuit 530 at the time of power-on with the temperature of the last power-off time stored in the memory through the memory access circuit 525 to obtain a temperature difference value, and judge based on this Whether to check the display compensation parameters.
  • the first detection and judgment circuit 505 may obtain the accumulated display time of the stage stored in the memory through the memory access circuit 525, and determine whether to perform the power-on detection on the display compensation parameter according to this.
  • the second detection and judgment circuit 510 is configured to determine whether the organic light emitting display device needs to be shut down and detected during the shutdown operation stage of the organic light emitting display device.
  • the second detection determination circuit 510 may be configured to determine whether to perform a shutdown detection according to at least one of the cumulative display time of the stage and the single display time.
  • the compensation detection control circuit 515 is configured to control the compensation detection circuit to perform a startup detection or a shutdown detection according to a judgment result of the first detection judgment circuit or the second detection judgment circuit to obtain a new compensation parameter value.
  • the compensation detection control circuit 515 may receive ISD data from an internal sensor (ISD, internal data refers to data sensed from inside a display panel / pixel according to an electrical / optical compensation program). For example, the compensation detection control circuit 515 may receive a compensation parameter such as a threshold voltage and / or mobility from the detection driving transistor by controlling the driving circuit having the detection module shown in FIG. 1C. The compensation detection control circuit 515 can also obtain environmental compensation parameters and the like through internal or external sensors, which is not limited in this disclosure.
  • the compensation driving circuit 520 is configured to perform startup display compensation according to an existing display compensation parameter or a new compensation parameter value during a startup operation phase. For example, using the aforementioned compensation formula:
  • the compensation driving circuit 520 may be further configured to perform real-time compensation detection on the organic light-emitting display device during the display operation phase, and perform compensation display on the display data based on the display compensation parameters detected in real time. This is known and well-known to those skilled in the art, and will not be described again.
  • the memory access circuit 525 is used to access an external memory.
  • the external memory can display any compensation-related data and other data such as compensation parameters, temperature data, and cumulative display time of the stage.
  • the driving controller 500 may be integrated in a timing controller of the display device as a part of the timing controller.
  • FIG. 6 illustrates an organic light emitting display device (OLED) according to an exemplary embodiment of the present disclosure, which may include a drive controller and a memory according to an embodiment of the present disclosure as described above.
  • the drive controller can be integrated in the timing controller.
  • the memory is used to store data related to display compensation. It is easy to understand that this is only an example for explaining the technical idea of the present disclosure, and the technical solution according to the embodiment of the present disclosure is not limited thereto. Details are described below.
  • the organic light emitting display device 600 includes an external sensor 610, a timing controller 620, a source driver 630, a display panel 640, a memory 650, and a gate driver 660.
  • the display panel 640 has a plurality of pixel units 670.
  • Each pixel unit 670 may include a pixel driving circuit and a light emitting element coupled to the pixel driving circuit.
  • the pixel driving circuit includes a driving transistor.
  • the timing controller 620 reads data stored in the memory 650, and receives externally input RGB data, a timing control signal TC (Timing Control), and a user control signal CTRL.
  • the timing controller 620 receives, for example, ISD (Internal Sensing Data) data output through a source driver (ISD refers to data from an internal sensor, such as a compensation parameter detected from inside a pixel according to a compensation program).
  • ISD Internal Sensing Data
  • the timing controller 620 also receives an ESD (External Sensing Data) signal from the external sensor 610.
  • the external sensor 610 can detect data such as ambient temperature, panel temperature, and PCB temperature, and can also sense data such as ambient light, user viewing distance, and current brightness of the Panel.
  • the external sensor 610 may include, for example, a temperature sensor for acquiring at least one of an ambient temperature, a panel temperature of the organic light emitting display device, and a circuit board temperature of the organic light emitting display device.
  • the memory 650 stores compensation parameters, such as threshold voltage Vth of different driving TFTs, mobility, threshold voltage Voled of different OLED devices, and / or optical compensation parameters of different OLED devices.
  • the memory 650 also stores time parameters such as the single display time and the cumulative display time of the display device, temperature data at a certain point in time, and time-segment storage parameters by region.
  • the source driver receives 630 received data Data and source number control signal SCS, and generates corresponding data voltages to output to the display panel through the data line DL.
  • the gate driver 660 receives the gate control signal GCS and generates a corresponding gate signal to be output to the display panel through the gate line GL.
  • the source driver 630 senses the electrical / optical characteristics of the pixels through the sensing line SL, and generates corresponding detection data to output to the timing controller 620.
  • the timing controller 620 uses the obtained compensation parameters to generate a compensated data Data signal and a source control signal SCS (Source Control Signal) during the OLED startup operation phase, the normal display phase, and the shutdown operation phase, and outputs them to the source driver 630.
  • the timing controller 620 generates a gate control signal GCS (Gate Control Signal) and outputs it to the gate driver 660.
  • the user control signal CTRL includes data such as the off / on time difference, the off command, and the like.
  • the timing controller 620 receives the CTRL signal transmitted externally, the ESD signal transmitted by the external sensor 610, and reads the data in the memory 650. Then, it is judged whether to perform the power-on detection. If so, the compensation parameters are being detected, and the startup compensation display is performed based on the new compensation parameter values. If not, the power-on compensation display is performed according to the compensation parameters in the memory 650.
  • the timing controller 620 performs compensation display on the display data based on the display compensation parameters detected in real time. For example, the timing controller 620 detects and compensates the threshold voltage / mobility or / and the OLED threshold voltage / brightness compensation parameters of all the driving TFTs in real time. If no shutdown signal is received, real-time detection and compensation display can be performed all the time.
  • the timing controller 620 judges whether to perform shutdown detection according to an externally transmitted CTRL signal, an ESD signal transmitted by an external sensor, an ISD signal transmitted by a source driver, and a single run time. If yes, check some or all of the compensation parameters, then update the memory, and then shut down. If not, go directly to the shutdown operation.
  • FIG. 7 illustrates a data update method according to an exemplary embodiment of the present disclosure.
  • this embodiment uses two memory areas for data update.
  • the first updated first storage area such as storage area B, is read.
  • shutdown detection is performed.
  • the second storage area such as storage area A
  • the second storage area is updated. In this way, when an accident such as a power failure occurs during the update process, the data in the storage area B can be read at the next startup without affecting the startup and display.
  • sensing judgment is performed during startup and shutdown, and compensation parameters are sensed only when needed, shortening startup and shutdown times, and improving user experience.
  • compensation detection is performed after the black screen is left for a period of time during shutdown, which can improve data reliability and availability.
  • modules may be distributed in the device according to the description of the embodiment, or may be correspondingly located in one or more devices different from this embodiment.
  • the modules in the above embodiments may be combined into one module, or further divided into multiple sub-modules.

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Abstract

一种驱动有机发光显示装置的方法、驱动控制器及显示装置。驱动有机发光显示装置的方法包括：在有机发光显示装置开机运行阶段，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测。在需要对有机发光显示装置的显示补偿参数进行开机检测时，对有机发光显示装置的显示补偿参数进行开机检测，得到新的补偿参数值，基于新的补偿参数值进行开机补偿显示。在有机发光显示装置关机运行阶段，判断是否需要对有机发光显示装置进行关机检测。在需要对有机发光显示装置的显示补偿参数进行关机检测时，对有机发光显示装置进行关机检测，得到更新的补偿参数值；存储更新的补偿参数值。

Description

驱动有机发光显示装置的方法、驱动控制器及显示装置
交叉引用
本申请要求于2018年5月31日提交的申请号为201810549367.7、发明名称为“驱动有机发光显示装置的方法、驱动控制器及显示装置”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，具体而言，涉及驱动有机发光显示装置的方法、驱动控制器及显示装置。
背景技术
随着技术的不断进步，用户在对产品的价格和实用性有更高关注的同时，对产品的感观质量也有苛刻的需求。在显示领域，特别是有机发光显示器(OLED)领域，提高画面显示质量一直是技术人员努力的方向。在OLED显示装置中，驱动TFT的特性会发生改变，这会影响显示质量。
发明内容
本公开提供了驱动有机发光显示装置的方法、驱动控制器及显示装置。
根据本公开的一方面，提供一种驱动有机发光显示装置的方法，有机发光显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与像素驱动电路耦接的发光元件，像素驱动电路包括驱动晶体管。该方法包括：
在有机发光显示装置开机运行阶段，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测；
在需要对有机发光显示装置的显示补偿参数进行开机检测时，进行如下开机操作：
对有机发光显示装置的显示补偿参数进行开机检测，得到新的补偿参数值，
基于新的补偿参数值进行开机补偿显示；
在有机发光显示装置关机运行阶段，判断是否需要对有机发光显示装置进行关机检测；
在需要对有机发光显示装置的显示补偿参数进行关机检测时，进行如下关机操作：
对有机发光显示装置进行关机检测，得到更新的补偿参数值；
存储更新的补偿参数值。
根据一些实施例，显示补偿参数包括电学补偿参数、光学补偿参数中的至少一种。
根据一些实施例，电学补偿参数包括每个像素单元的驱动晶体管的阈值电压和/或迁移率，和/或每个像素单元的发光元件的阈值电压。
根据一些实施例，光学补偿参数包括用于每个像素单元的亮度查找表和亮度拟合参数。
根据一些实施例，在对有机发光显示装置的显示补偿参数进行开机检测时，显示补偿参数还包括环境补偿参数，环境补偿参数包括环境光参数、用户观看距离和有机发光显示装置的当前亮度中的至少一种。
根据一些实施例，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测包括：根据关机静置时间、开机和上次关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
根据一些实施例，关机操作还包括：获取并存储关机时的环境温度、面板温度、电路板温度中的至少一种。
根据一些实施例，开机操作还包括：获取开机时环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种；获取所检测的开机时的环境温度、面板温度、电路板温度中的至少一种与上次关机时的环境温度、面板温度、电路板温度中的至少一种的相应差异值。
根据一些实施例，判断是否需要对有机发光显示装置进行关机检测包括：根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
根据一些实施例，关机操作还包括：在对有机发光显示装置进行关机检测之前，使有机发光显示装置以黑画面静置一段时间。例如，根据开机运行时间，以黑画面静置30秒至10分钟。
根据一些实施例，前述方法还包括：在显示运行阶段，对有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。
根据一些实施例，前述方法还包括：在不需要对有机发光显示装置的显示补偿参数进行开机检测时，利用已存储的显示补偿参数进行开机补偿显示。
根据本公开的另一方面，提供一种用于有机发光显示装置的驱动控制器，有机发光显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与像素驱动电路耦接的发光元件，像素驱动电路包括驱动晶体管，有机发光显示装置还包括用于检测显示补偿参数的补偿检测电路。该驱动控制器包括：
第一检测判断电路，用于在有机发光显示装置开机运行阶段，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测；
第二检测判断电路，用于在有机发光显示装置关机运行阶段，判断是否需要对有机发光显示装置进行关机检测；
补偿检测控制电路，用于根据第一检测判断电路或第二检测判断电路的判断结果控制补偿检测电路进行开机检测或关机检测以得到新的补偿参数值；
补偿驱动电路，用于在开机运行阶段根据已有的显示补偿参数或新的补偿参数值进行开机显示补偿；
存储器访问电路，用于访问外部存储器。
根据一些实施例，驱动控制器还包括：外部检测数据获取电路，用于获取外部环境检测数据。
根据一些实施例，驱动控制器集成在时序控制器中。
根据一些实施例，第一检测判断电路配置为：根据关机静置时间、开机和关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
根据一些实施例，第二检测判断电路配置为：根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
根据一些实施例，补偿驱动电路还用于：在显示运行阶段，对有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。
根据本公开的再一方面，提供一种显示装置。该显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与像素驱动电路耦接的发光元件，像素驱动电路包括驱动晶体管，该显示装置具有补偿检测电路。该显示装置还包括：前述任一驱动控制器；以及存储器，用于存储与显示补偿相关的数据。
根据一些实施例，显示装置还包括：温度传感器，用于获取环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种。
附图说明
包括附图以提供对本公开的进一步理解，附图并入本申请并组成本申请的一部分，附图示出了本公开的实施例，并与描述一起用于解释本公开的原理。显而易见地，以下附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：
图1A示出根据本公开示例性实施例的有机发光显示装置；
图1B示出像素单元的示例性驱动电路；
图1C作为示例示出具有检测模块的驱动电路；
图2示出根据本公开示例性实施例的驱动有机发光显示装置的方法流程图；
图3示出根据本公开示例性实施例的有机发光显示装置的开机检测流程图；
图4示出根据本公开示例性实施例的有机发光显示装置的关机检测流程图；
图5示出根据本公开示例性实施例用于有机发光显示装置的驱动控制器；
图6示出根据本公开示例性实施例的有机发光显示装置；
图7示出根据本公开示例性实施例的数据更新方法。
具体实施方式
现现在将参考附图更全面地描述示例实施例。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的实施例；相反，提供这些实施例使得本公开将全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
此外，所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开的技术方案而没有特定细节中的一个或更多，或者可以采用其它的方法、组元、材料、装置、步骤等。在其它情况下，不详细示出或描述公知结构、方法、装置、实现、材料或者操作以避免模糊本公开的各方面。
附图中所示的方框图不一定必须与物理上独立的实体相对应。即，可以采用软件形式来实现这些功能实体，或在一个或多个硬件模块或集成电路中实现这些功能实体，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
附图中所示的流程图仅是示例性说明，不是必须包括所有的步骤。例如，有的步骤还可以分解，而有的步骤可以合并或部分合并，因此实际执行的顺序有可能根据实际情况改变。
在OLED显示装置中，长时间放置、长时间运行或温度相差较大时，驱动TFT的特性都会相差较大。例如，长时间运行后驱动TFT的阈值电压参数会正向漂移(变大)；长时间放置后驱动TFT的阈值电压参数会负向漂移(变小)。对于长时间驱动后又长时间放置的现象，在开机时由于驱动TFT的特性变化，会出现亮暗不均、残像等影响画质的现象。另外，温度升高，驱动TFT的迁移率μ参数会变大；温度降低，驱动TFT的迁移率μ参数会变小。在关机和开机温差变化较大时，驱动TFT的特性变化较大会造成OLED显示装置画面亮暗不均，画面质量降低。
发明人发现，对于开机和关机时进行补偿检测的方案，虽然能够提高显示质量，但是却存在检测时间影响用户体验的问题。例如，开机时的补偿检测操作可能耗时2秒或者更多，而关机时的感测操作可能执行30秒或更多。有些时候，这对用户而言会带来不愉快的等待。
另外，发明人还发现，开机和关机检测并不是在所有情况下都是必须的。例如，在用户使用频率较高、但每次并不超长使用时，显示补偿参数变化可能并不大。
因此，本申请发明人提出一种方案，通过在开机和关机阶段选择性地进行补偿检测，从而在改善显示质量的同时，可以提高用户体验。下面对本公开实施例的技术方案进行详细描述。
图1A示出根据本公开示例性实施例的有机发光显示装置。
如图1A所示，有机发光显示装置100包括时序控制器110、数据驱动器120、控制与扫描驱动器130、像素阵列140。像素阵列140具有多个像素单元150，每个像素单元150包括驱动电路及与驱动电路耦接的发光元件(未示出)。每个驱动电路包括驱动晶体管。多个像素单元150分别连接到扫描线S1至Sn、数据线D1至Dm、发光控制线E1至En、第一电源ELVDD及第二电源ELVSS。
控制与扫描驱动器130用于向扫描线S1至Sn依次提供扫描信号以及向发光控制线E1至En提供发光控制信号。数据驱动器120用于向数据线D1至Dm提供数据信号。
当扫描信号依次提供给扫描线时，与扫描线相连的像素单元行被选中。相应地，被选中的像素单元接收来自数据线的数据信号(数据电压)。数据电压控制从电源ELVDD流向OLED的电流，从而控制OLED产生具有相应亮度的光，并因此显示图像。像素单元的发光时长由发光控制信号控制。
数据驱动器120、控制与扫描驱动器130通过时序控制器110控制。时序控制器110可向数据驱动器120提供数据驱动控制信号，向控制与扫描驱动器130提供扫描驱动控制信号和发光驱动控制信号。
有机发光显示装置100还包括检测显示补偿参数的补偿检测电路(未示出)。例如，驱动电路可包括检测电路，用于检测驱动晶体管的阈值电压和/或迁移率，如本领域技术人员所熟知的。
易于理解，图1A所示出和描述的显示装置仅是示例性的，而不是用于限制本公开。
图1B示出像素单元的示例性驱动电路。
参照图1B，如本领域技术人员所熟知的，用于像素单元的驱动电路包括驱动晶体管T1、开关晶体管T2及电容C1。数据线Dm电连接到开关晶体管T2的输入端，扫描线Sn电连接到开关晶体管T2的控制端，开关晶体管的输出端电连接到驱动晶体管T1的控制端。第一电源VDD电连接到驱动晶体管的输入端，发光元件OLED电连接在驱动晶体管T1的输出端与第二电源VSS之间。流过驱动晶体管T1的电流可由下式确定：
I＝μ(V gs-V th) 2
其中，V th为驱动晶体管T1的阈值电压，V gs为电容C1两端的电压差，μ为驱动晶体管T1的迁移率。
由于制造工艺的局限性，不同的驱动晶体管的阈值电压以及迁移率会存在一定差异，导致OLED显示器件的电流差异和亮度差异。另外，OLED使用过程中驱动晶体管的阈值电压和迁移率还会产生飘移和变化，导致不同部分之间显示亮度的差异。
此外，由于使用条件不同或长时间使用后的老化等原因，不同部分的发光元件的 阈值电压和/或亮度也会产生差异，影响用户的感观体验。
因此，已经提出各种方案，通过检测电学或光学补偿参数，对驱动晶体管的阈值电压和/或迁移率、和/或发光元件的电学/光学性能进行补偿。
如本领域技术人员所熟知的，补偿方法可以分为内部补偿和外部补偿。内部补偿是指在像素内部利用薄膜晶体管构建的子电路进行补偿的方法。外部补偿是指通过检测电路或设备检测电学或光学补偿参数，然后进行补偿的方法。
图1C作为示例示出具有检测模块的驱动电路。
如图1C所示，该驱动电路与图1B所示电路基本相同，但是增加了检测晶体管T3。检测晶体管T3用于控制感测线SL与驱动晶体管T1的S端之间的导通和关断，其第一端、第二端和控制端可以分别电耦接至第一节点驱动晶体管T1的S端、感测线SL和控制线GL2，从而在经由来自控制线GL2的控制信号的控制下导通和关断，以检测驱动晶体管的阈值电压和/或迁移率等补偿参数。这些是本领域技术人员所熟知的，在此不做详细讨论。
除了驱动晶体管的阈值电压和/或迁移率等电学补偿参数外，有时还需要检测光学补偿参数，例如亮度查找表和亮度拟合参数。光学补偿参数可以包括亮度查找表，亮度查找表反映的是理想亮度与转换亮度之间的对应关系。光学补偿参数包括但不局限于亮度查找表和拟合参数。
作为示例，在获得补偿参数后，可以通过如下方式进行补偿显示。
当需要显示第一显示数据时，通过亮度查找表获取与第一显示数据对应的第一转换亮度。然后，根据第一转换亮度和亮度拟合参数，得到第二显示数据：
L2＝k1*L1+k2
L2表示所述第二显示数据，L1表示所述第一转换亮度，k1和k2表示亮度拟合参数。
然后，根据电学补偿参数和第二显示数据，得到第三显示数据：
L3＝μ*L2+V th
L3表示第三显示数据，V th为驱动晶体管的阈值电压，μ为驱动晶体管的迁移率。
此外，使用环境不同也会对用户的感观体验造成影响。因此，有时也需对环境补偿参数进行检测以用于补偿显示，例如对环境光参数、用户观看距离、有机发光显示装置的当前亮度等进行检测以用于补偿显示，此处不再赘述。
图2示出根据本公开示例性实施例的驱动有机发光显示装置的方法流程图。在图2所示的方法中，在开机和关机阶段选择性地进行补偿检测。下面对图2所示的方法进行详细说明。
参见图2，在S210，在有机发光显示装置开机运行阶段，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测。如果判断结果为是，则转到S220；否则，转到S240。
如前所述，根据本公开实施例，开机检测并不是在所有情况下都是必须的。例如，在用户使用频率较高、但每次并不超长使用时，显示补偿参数变化可能并不大，这时可以不必每次进行开机检测。
根据一些实施例，可根据关机静置时间、开机和关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
例如，可以判断关机静置时间是否大于阈值(例如，12小时)。关机静置时间是上次关机之后至本次开机所经过的时间。如果判断结果为是，则进行开机检测；如果判断结果为否，则不进行开机检测或者进行其他判断。
又例如，可以判断开机和上次关机时的温度差异值是否大于阈值(例如10摄氏度)。如果判断结果为是，则进行开机检测；如果判断结果为否，则不进行开机检测或者进行其他判断。
再例如，可以判断阶段累计显示时间是否大于阈值(例如，120小时)。阶段累计显示时间是上次开机检测或关机检测之后累计显示运行的时间。如果判断结果为是，则进行开机检测；如果判断结果为否，则不进行开机检测或者进行其他判断。如果阈值设为零，则表示如果上次关机时没有进行关机检测，就进行开机检测。
根据示例实施例，可获取开机时环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种，并进而获取所检测的开机时的环境温度、面板温度、电路板温度中的至少一种与上次关机时的环境温度、面板温度、电路板温度中的至少一种的相应差异值，以用于判断是否对显示补偿参数进行开机检测。例如，可获取开机时的环境温度，并将该温度与上次关机时获取的环境温度比较，根据得到的差异值判断是否进行开机检测(例如，在差异值大于阈值，如5摄氏度时进行开机检测)。同理，可获取开机时的面板温度和/或电路板温度，并将该温度与上次关机时获取的面板温度/电路板温度比较，根据得到的差异值判断是否进行开机检测(例如，在差异值大于阈值，如10摄氏度时进行开机检测)。
在S220，在需要对有机发光显示装置的显示补偿参数进行开机检测时，对有机发光显示装置的显示补偿参数进行开机检测，得到新的补偿参数值。
显示补偿参数可包括电学补偿参数、光学补偿参数中的至少一种，但本公开实施例的方案不限于此。本领域技术人员可以根据需要增加或使用其他的显示补偿参数。
电学补偿参数可包括每个像素单元的驱动晶体管的阈值电压和/或迁移率，和/或每个像素单元的发光元件的阈值电压。光学补偿参数包括用于每个像素单元的亮度查找表和亮度拟合参数。
在对有机发光显示装置的显示补偿参数进行开机检测时，显示补偿参数还可包括环境补偿参数。环境补偿参数可包括环境光参数、用户观看距离和有机发光显示装置的当前亮度中的至少一种。
这些补偿参数对本领域技术人员是熟知的，这里不做详细讨论以避免偏离本公开 实施例的实质方面。易于理解，本领域技术人员也可能根据需要，使用其他或未来发现的有用的显示补偿参数，本公开对此没有限制。
在S230，基于新的补偿参数值进行开机补偿显示。根据实施例，在获得新的补偿参数值之后，以新的补偿参数值对开机显示数据进行补偿显示。
在S240，在不需要对有机发光显示装置的显示补偿参数进行开机检测时，利用已存储的显示补偿参数进行开机补偿显示。例如，根据从存储器读出的显示补偿参数对开机显示数据进行补偿显示。
在S250，进行正常运行显示阶段。在显示运行阶段，可以例如对有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。
在S260，判断是否进行关机。如果判断结果为是，则转到S270；如果为否，则转到S250。
在S270，在有机发光显示装置关机运行阶段，判断是否需要对有机发光显示装置进行关机检测。如果判断结果为是，则转到S275；否则，转到S290。
如前所述，根据本公开实施例，关机检测并不是在所有情况下都是必须的。例如，在用户使用时间很短等情况下，显示补偿参数变化可能并不大，这时可以不必每次进行关机检测。
根据一些实施例，可根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
例如，可以判断阶段累计显示时间是否大于阈值(例如，120小时)。如果判断结果为是，则进行关机检测；如果判断结果为否，则不进行关机检测或者进行其他判断。
又例如，可以判断单次显示时间是否大于阈值(例如，2小时)。单次显示时间是本次开机运行之后至本次关机所经过的时间。如果判断结果为是，则进行关机检测；如果判断结果为否，则不进行关机检测或者进行其他判断。
在S275，对有机发光显示装置进行关机检测，得到更新的补偿参数值。
如前所述，显示补偿参数可包括电学补偿参数、光学补偿参数中的至少一种。电学补偿参数可包括每个像素单元的驱动晶体管的阈值电压和/或迁移率，和/或每个像素单元的发光元件的阈值电压。光学补偿参数包括用于每个像素单元的亮度查找表和亮度拟合参数。但本公开实施例的方案不限于此。本领域技术人员可以根据需要增加或使用其他的显示补偿参数。
在S280，存储更新的补偿参数值。根据实施例，通过关机检测得到更新的补偿参数后，将更新的补偿参数值存储到存储器中，以用于下次开机运行时使用。
根据一些实施例，在对有机发光显示装置进行关机检测之前，使有机发光显示装置以黑画面静置一段时间，以使显示面板的温度下降。
根据一些实施例，在关机检测之后，使阶段累计显示时间清零。
根据一些实施例，在关机运行阶段，还可获取并存储关机时的环境温度、面板温度、电路板温度中的至少一种，以用于下次开机时使用。
在S290，执行正常关机操作。
图3示出根据本公开示例性实施例的有机发光显示装置的开机检测流程图。易于理解，这仅是为了说明本公开技术构思的一个示例，根据本公开实施例的技术方案不限于此。
如图3所示，在S310，判断关机静置时间是否大于第一阈值T1。如果大于T1，则转到S350进行开机检测；若小于T1，则转到S320进行下一级判断。
在S320，将存储器中保存的上次关机时的温度数据和开机时来自温度感测器的温度数据做比较。如果温度差异大于设定值Ts，则转到S350进行开机检测；若温度差异小于设定值Ts，则转到S330进行下一级判断。
在S330，判断累计显示时间是否大于阈值Ta。若累计显示时间大于Ta，则转到S350进行开机检测；若累计显示时间不大于Ta，则转到S340进行正常开机显示，不进行显示补偿参数的开机检测。在阈值Ta设置为0时，如果累计显示时间大于阈值Ta，则表示上次关机时没有进行关机检测，需要进行开机检测；如果累计显示时间等于阈值Ta，则表示在上次关机时已进行关机检测，可进行正常开机显示。
图4示出根据本公开示例性实施例的有机发光显示装置的关机检测流程图。易于理解，这仅是为了说明本公开技术构思的一个示例，根据本公开实施例的技术方案不限于此。
如图4所示，在S405，显示装置正常显示运行。
在S410，判断累计显示时间(指阶段累计显示时间)是否大于等于预定值T2且小于预定值T3。若是，则转到S412。若否，则转到S415。
在S412，判断是否接收到关机信号。若没有接收到则转到S405继续显示。若接收到关机信号，则转到S445。
在S415，判断累计显示时间是否大于等于T3。若是，则转到S420。若否，表明累计显示时间小于T2，则转到S422。
在S420，判断累计显示时间是否等于预定值T5。预定值T5可以等于T3或一个比T3更大的值。若判断结果为是，在转到S430；否则，转到S412。
在S422，判断是否收到关机信号。若没有接收到关机信号，则转到S405继续显示。若接收到关机信号，则转到S425。
在S425，判断单次显示时间是否大于预定值T4。若是，则转到S445；否则，转到S470。
在S430，由于累计显示时间等于T5，请求客户关机。
在S432，判断是否收到关机信号。若没有接收到关机信号，转到S435；否则，转到S440。
在S435，更新预定值T5为增加一预定值T7，然后转到S420。
在S440，T5复位，恢复为初始预定值。
在S445，发送关机检测命令，准备进入关机检测。
在S450，在检测补偿参数之前，显示装置以黑画面静置一段时间，使面板、电路板等温度降下来。
在S455，进行补偿参数检测。另外，也可进行温度检测，获取温度数据。
在S460，更新存储器。
在S465，累计显示时间清零。
在S470，进行正常关机操作。
图5示出根据本公开示例性实施例用于有机发光显示装置的驱动控制器，可实现前述的驱动方法。
有机发光显示装置可以是参照图1A所描述的装置或其他有机发光显示装置。有机发光显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与像素驱动电路耦接的发光元件。像素驱动电路包括驱动晶体管。
有机发光显示装置还包括用于检测显示补偿参数的补偿检测电路，例如参照图1C所描述的检测模块或其他检测电路。
如图5所示，根据本公开示例实施例的驱动控制器500包括第一检测判断电路505、第二检测判断电路510、补偿检测控制电路515、补偿驱动电路520以及存储器访问电路525。
第一检测判断电路505用于在有机发光显示装置开机运行阶段，判断是否需要对有机发光显示装置的显示补偿参数进行开机检测。例如，第一检测判断电路505可配置为根据关机静置时间、开机和关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
如前所述，显示补偿参数可包括电学补偿参数、光学补偿参数中的至少一种，但本公开实施例的方案不限于此。本领域技术人员可以根据需要增加或使用其他的显示补偿参数。电学补偿参数可包括每个像素单元的驱动晶体管的阈值电压和/或迁移率，和/或每个像素单元的发光元件的阈值电压。光学补偿参数包括用于每个像素单元的亮度查找表和亮度拟合参数。在对有机发光显示装置的显示补偿参数进行开机检测时，显示补偿参数还可包括环境补偿参数。环境补偿参数可包括环境光参数、用户观看距离和有机发光显示装置的当前亮度中的至少一种。易于理解，本领域技术人员也可能根据需要，使用其他或未来发现的有用的显示补偿参数，本公开对此没有限制。
根据一些实施例，驱动控制器500可接收用户控制信号CTRL，用户控制信号CTRL包括关机/开机时间差、关机命令等数据。第一检测判断电路505可根据用户控制信号CTRL获取关机静置时间，并据此判断是否对显示补偿参数进行开机检测。
根据一些实施例，驱动控制器500还可包括外部检测数据获取电路530，用于获 取外部环境检测数据。外部检测数据获取电路530可接收来自外部感测器的外部感测数据(ESD：external sense data)，例如环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度等温度数据。
第一检测判断电路505可利用开机时通过外部检测数据获取电路530得到的温度数据与通过存储器访问电路525获取存储器中保存的上次关机时的温度进行比较以得到温度差异值，并据此判断是否对显示补偿参数进行开机检测。
根据一些实施例，第一检测判断电路505可通过存储器访问电路525获取取存储器中保存的阶段累计显示时间，并据此判断是否对显示补偿参数进行开机检测。
第二检测判断电路510用于在有机发光显示装置关机运行阶段，判断是否需要对有机发光显示装置进行关机检测。例如，第二检测判断电路510可配置为根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
补偿检测控制电路515用于根据第一检测判断电路或第二检测判断电路的判断结果控制补偿检测电路进行开机检测或关机检测以得到新的补偿参数值。
补偿检测控制电路515可接收来自内部感测器的ISD数据(ISD，internal sense data指根据电学/光学补偿程序，从显示面板/像素内部感测到的数据)。例如，补偿检测控制电路515可通过控制图1C所示的具有检测模块的驱动电路，接收来自检测驱动晶体管的阈值电压和/或迁移率等补偿参数。补偿检测控制电路515还可通过内部或外部感测器获取环境补偿参数等，本公开对此没有限制。
补偿驱动电路520用于在开机运行阶段根据已有的显示补偿参数或新的补偿参数值进行开机显示补偿。例如，通过前面提到的补偿公式：
L3＝μ*L2+V th
但本公开对具体补偿方式和过程没有限制。
根据一些实施例，补偿驱动电路520还可用于在显示运行阶段，对有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。这是本领域技术人员所了解和熟知的，不再赘述。
存储器访问电路525用于访问外部存储器。如前所述，外部存储器可显示补偿参数、温度数据、阶段累计显示时间等任何与显示补偿相关的数据和其他数据。
根据一些实施例，驱动控制器500可集成在显示装置的时序控制器中，作为时序控制器的一部分。
图6示出根据本公开示例性实施例的有机发光显示装置(OLED)，其中可包括如前所述根据本公开实施例的驱动控制器以及存储器。该驱动控制器可集成在时序控制器中。存储器用于存储与显示补偿相关的数据。易于理解，这仅是为了说明本公开技术构思的一个示例，根据本公开实施例的技术方案不限于此。下面进行详细说明。
参照图6，有机发光显示装置600包括外部感测器610、时序控制器620、源极驱动器630、显示面板640、存储器650以及栅极驱动器660。
显示面板640具有多个像素单元670。每个像素单元670可包括像素驱动电路及与像素驱动电路耦接的发光元件。像素驱动电路包括驱动晶体管。
时序控制器620读取存储器650中存储的数据，并接收外部输入的RGB数据、时序控制信号TC(Timing Control)以及用户控制信号CTRL。另外，时序控制器620接收通过例如源极驱动器输出的ISD(Internal Sense Data)数据(ISD指来自内部感测器的数据，例如根据补偿程序从像素内部检测到的补偿参数)。时序控制器620还接收来自外部感测器610的ESD(External Sense Data)信号。外部感测器610可检测环境温度、面板(Panel)温度、PCB温度等数据，还可感测环境光、用户观看距离、Panel当前亮度等数据。外部感测器610可包括例如温度传感器，用于获取环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种。
存储器650存储补偿参数，例如不同驱动TFT的阈值电压Vth、迁移率、不同OLED器件的阈值电压Voled、和/或不同OLED器件的光学补偿参数等。存储器650还存储显示装置的单次显示时间及阶段累计显示时间等时间参数、某时间点的温度数据、以及分区域分时存储参数等。
源极驱动器接630收数据Data和源极号控制信号SCS，产生相应的数据电压通过数据线DL输出给显示面板。栅极驱动器660接收栅极控制信号GCS，产生相应的栅极信号通过栅极线GL输出给显示面板。通过源极驱动器630和栅极驱动器660的控制，源极驱动器630通过感测线SL感测像素的电学/光学特性，并产生相应的检测数据输出至时序控制器620。
利用获得的补偿参数，在OLED开机运行阶段、正常显示阶段、关机运行阶段，时序控制器620产生经过补偿的数据Data信号和源极控制信号SCS(Source Control Signal)并输出至源极驱动器630。另外，时序控制器620产生栅极控制信号GCS(Gate Control Signal)并输出至栅极驱动器660。用户控制信号CTRL包括关机/开机时间差、关机命令等数据。
例如，在开机运行阶段，时序控制器620接收外部传输的CTRL信号、外部感测器610传输的ESD信号并读取存储器650中的数据。然后，判断是否进行开机检测。若是，则在检测补偿参数，并基于新的补偿参数值进行开机补偿显示。若否，则根据存储器650中的补偿参数进行开机补偿显示。
例如，在正常显示运行过程中，时序控制器620基于实时检测的显示补偿参数对显示数据进行补偿显示。例如，时序控制器620实时检测并补偿所有驱动TFT的阈值电压/迁移率或/和OLED阈值电压/亮度补偿参数等。若没有接收到关机信号，可一直进行实时检测和补偿显示。
例如，在关机运行阶段，时序控制器620根据外部传输的CTRL信号、外部感测器传输的ESD信号、源极驱动器传输的ISD信号和单次运行时间，判断是否进行关 机检测。若是，则检测部分或全部补偿参数，然后更新存储器，然后关机。若否，则直接进入关机操作。
图7示出根据本公开示例性实施例的数据更新方法。
为了避免在更新存储器时进行由于断电等动作而造成的存储数据错误现象，本实施例采用两个存储器区域进行数据更新。
参见图7，在S710，开机。
在S720，读取上次更新的第一存储区域，例如存储区域B。
在S730，正常显示时，实时检测并进行补偿显示。
在S740，进行关机检测。
在S750，检测完毕后，更新第二存储区域，例如存储区域A。这样，当更新过程中发生断电等意外时，下次开机时可读取存储区域B的数据，不会影响开机及显示。
在S760，完成关机。
通过以上的详细描述，本领域的技术人员易于理解，根据本申请实施例的系统和方法具有以下优点中的一个或多个。
根据本公开一些实施例，在开机和关机时进行感测判断，需要时才感测补偿参数，缩短开机和关机时间，可改善用户体验。
根据本公开一些实施例，根据关机静置时间、开机和关机时的温度差异值、和/或阶段累计显示时间等判断是否进行开机感测，提高补偿精准性。
根据本公开一些实施例，关机时黑画面静置一段时间后进行补偿检测，可提高数据可靠性和可用性。
本领域技术人员可以理解，附图只是示例实施例的示意图，附图中的模块或流程并不一定是实施本公开所必须的，因此不能用于限制本公开的保护范围。
本领域技术人员可以理解上述各模块可以按照实施例的描述分布于装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。
以上具体地示出和描述了本公开的示例性实施例。应该理解，本公开不限于所公开的实施例，相反，本公开意图涵盖包含在所附权利要求的精神和范围内的各种修改和等效布置。
已经针对附图给出了对本公开的特定示例性实施例的前面的描述。这些示例性实施例并不意图是穷举性的或者将本公开局限于所公开的精确形式，并且明显的是，在以上教导的启示下，本领域普通技术人员能够做出许多修改和变化。因此，本公开的范围并不意图局限于前述的实施例，而是意图由权利要求和它们的等同物所限定。

Claims (20)

  1. 一种驱动有机发光显示装置的方法，所述有机发光显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与所述像素驱动电路耦接的发光元件，所述像素驱动电路包括驱动晶体管，所述方法包括：
    在所述有机发光显示装置开机运行阶段，判断是否需要对所述有机发光显示装置的显示补偿参数进行开机检测；
    在需要对所述有机发光显示装置的显示补偿参数进行开机检测时，进行如下开机操作：
    对所述有机发光显示装置的显示补偿参数进行开机检测，得到新的补偿参数值，基于所述新的补偿参数值进行开机补偿显示；
    在所述有机发光显示装置关机运行阶段，判断是否需要对所述有机发光显示装置进行关机检测；
    在需要对所述有机发光显示装置的显示补偿参数进行关机检测时，进行如下关机操作：
    对所述有机发光显示装置进行关机检测，得到更新的补偿参数值；
    存储所述更新的补偿参数值。
  2. 根据权利要求1所述的方法，其中，所述显示补偿参数包括电学补偿参数、光学补偿参数中的至少一种。
  3. 根据权利要求2所述的方法，其中，所述电学补偿参数包括每个像素单元的所述驱动晶体管的阈值电压和/或迁移率，和/或每个像素单元的所述发光元件的阈值电压。
  4. 根据权利要求2或3所述的方法，其中，所述光学补偿参数包括用于每个像素单元的亮度查找表和亮度拟合参数。
  5. 根据权利要求2至4中任意一项所述的方法，其中，在对所述有机发光显示装置的显示补偿参数进行开机检测时，所述显示补偿参数还包括环境补偿参数，所述环境补偿参数包括环境光参数、用户观看距离和所述有机发光显示装置的当前亮度中的至少一种。
  6. 根据权利要求1至5中任意一项所述的方法，其中，所述判断是否需要对所述有机发光显示装置的显示补偿参数进行开机检测包括：
    根据关机静置时间、开机和上次关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
  7. 根据权利要求6所述的方法，其中，所述关机操作还包括：
    获取并存储关机时的环境温度、面板温度、电路板温度中的至少一种。
  8. 根据权利要求7所述的方法，其中，所述开机操作还包括：
    获取开机时环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种；
    获取所检测的开机时的所述环境温度、所述面板温度、所述电路板温度中的至少一种与上次关机时的所述环境温度、所述面板温度、所述电路板温度中的至少一种的相应差异值。
  9. 根据权利要求1至8中任意一项所述的方法，其中，所述判断是否需要对所述有机发光显示装置进行关机检测包括：
    根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
  10. 根据权利要求1至9中任意一项所述的方法，其中，所述关机操作还包括：
    在对所述有机发光显示装置进行关机检测之前，使所述有机发光显示装置以黑画面静置一段时间。
  11. 根据权利要求1至10中任意一项所述的方法，还包括：
    在显示运行阶段，对所述有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。
  12. 根据权利要求1至11中任意一项所述的方法，还包括：
    在不需要对所述有机发光显示装置的显示补偿参数进行开机检测时，利用已存储的显示补偿参数进行开机补偿显示。
  13. 一种用于有机发光显示装置的驱动控制器，所述有机发光显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与所述像素驱动电路耦接的发光元件，所述像素驱动电路包括驱动晶体管，所述有机发光显示装置还包括用于检测显示补偿参数的补偿检测电路，所述驱动控制器包括：
    第一检测判断电路，用于在所述有机发光显示装置开机运行阶段，判断是否需要对所述有机发光显示装置的显示补偿参数进行开机检测；
    第二检测判断电路，用于在所述有机发光显示装置关机运行阶段，判断是否需要对所述有机发光显示装置进行关机检测；
    补偿检测控制电路，用于根据所述第一检测判断电路或所述第二检测判断电路的判断结果控制所述补偿检测电路进行开机检测或关机检测以得到新的补偿参数值；
    补偿驱动电路，用于在开机运行阶段根据已有的显示补偿参数或所述新的补偿参数值进行开机显示补偿；
    存储器访问电路，用于访问外部存储器。
  14. 根据权利要求13所述的驱动控制器，还包括：
    外部检测数据获取电路，用于获取外部环境检测数据。
  15. 根据权利要求13至14中任意一项所述的驱动控制器，其中，所述驱动控制器集成在时序控制器中。
  16. 根据权利要求13至15中任意一项所述的驱动控制器，其中，所述第一检测判断电路配置为：根据关机静置时间、开机和关机时的温度差异值、以及阶段累计显示时间中的至少一个判断是否进行开机检测。
  17. 根据权利要求13至16中任意一项所述的驱动控制器，其中，所述第二检测判断电路配置为：根据阶段累计显示时间、单次显示时间中的至少一个判断是否进行关机检测。
  18. 根据权利要求13至17中任意一项所述的驱动控制器，其中，所述补偿驱动电路还用于：在显示运行阶段，对所述有机发光显示装置进行实时补偿检测，并基于实时检测的显示补偿参数对显示数据进行补偿显示。
  19. 一种显示装置，所述显示装置包括多个像素单元，每个像素单元包括像素驱动电路及与所述像素驱动电路耦接的发光元件，所述像素驱动电路包括驱动晶体管，所述显示装置具有补偿检测电路，所述显示装置还包括：
    如权利要求13至18中任一项所述的驱动控制器；及
    存储器，用于存储与显示补偿相关的数据。
  20. 根据权利要求19所述的有机发光显示装置，还包括：
    温度传感器，用于获取环境温度、有机发光显示装置的面板温度、有机发光显示装置的电路板温度中的至少一种。
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