WO2020140787A1 - 像素补偿方法及装置、存储介质、显示屏 - Google Patents

像素补偿方法及装置、存储介质、显示屏 Download PDF

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Publication number
WO2020140787A1
WO2020140787A1 PCT/CN2019/127488 CN2019127488W WO2020140787A1 WO 2020140787 A1 WO2020140787 A1 WO 2020140787A1 CN 2019127488 W CN2019127488 W CN 2019127488W WO 2020140787 A1 WO2020140787 A1 WO 2020140787A1
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Prior art keywords
sub
pixel
brightness value
theoretical
target gray
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PCT/CN2019/127488
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English (en)
French (fr)
Inventor
朱明毅
林奕呈
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京东方科技集团股份有限公司
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Priority to US16/959,172 priority Critical patent/US11328688B2/en
Publication of WO2020140787A1 publication Critical patent/WO2020140787A1/zh

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    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10Intensity circuits
    • 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
    • G09G3/2007Display of intermediate tones
    • G09G3/2074Display of intermediate tones using sub-pixels
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    • 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
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    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
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    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • GPHYSICS
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    • 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
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    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/141Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light conveying information used for selecting or modulating the light emitting or modulating element
    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a pixel compensation method and device, storage medium, and display screen.
  • OLED Organic Light Emitting Diode
  • the embodiments of the present disclosure provide a pixel compensation method and device, a storage medium, and a display screen.
  • a pixel compensation method is provided, which is applied to a display screen.
  • the display screen includes a plurality of sub-pixels and a plurality of photosensitive units that correspond to the plurality of sub-pixels in one-to-one correspondence.
  • Sub-pixel sensing the method includes:
  • the plurality of sub-pixels are sensed by the plurality of photosensitive units to obtain the actual brightness value of each sub-pixel;
  • the compensation sensing model the theoretical brightness value of each sub-pixel under the first target gray scale is determined, and the compensation sensing model is used to record the correspondence between the target gray scale and theoretical pixel data, the theoretical pixel
  • the data includes a reference luminance value of each sub-pixel, and the theoretical luminance value of each sub-pixel corresponds to the reference luminance value of each sub-pixel one-to-one;
  • the performing pixel compensation on each sub-pixel according to the actual luminance value of each sub-pixel and the theoretical luminance value of each sub-pixel includes:
  • the brightness of each sub-pixel is adjusted to perform pixel compensation for each sub-pixel.
  • the determining the compensation error of each sub-pixel according to the actual brightness value of each sub-pixel and the theoretical brightness value of each sub-pixel includes:
  • the compensation error is determined according to a compensation error formula, and the compensation error formula is as follows:
  • ⁇ E represents the compensation error
  • x represents the theoretical brightness value
  • k is the compensation factor
  • k is a constant greater than 0.
  • the compensation sensing model is used to record a one-to-one correspondence between the target gray scale, theoretical pixel data and theoretical sensing data.
  • the theoretical sensing data includes the theoretical sensing parameter values of each photosensitive unit.
  • the theoretical sensing parameter value of each photosensitive unit is the sensing parameter value when each photosensitive unit senses the corresponding sub-pixel and obtains the corresponding theoretical brightness value,
  • the method further includes:
  • sensing the plurality of sub-pixels by the plurality of photosensitive units to obtain the actual brightness value of each sub-pixel includes:
  • the multiple light-sensing units sense the multiple sub-pixels with corresponding theoretical sensing parameter values to obtain the actual brightness value of each sub-pixel.
  • the display screen has m target gray levels
  • the first target gray level is any gray level among the m target gray levels
  • the m is an integer greater than or equal to 1
  • the The reference brightness value is the theoretical brightness value
  • the method further includes:
  • the multiple sub-pixels are sensed by the multiple photosensitive units to obtain the theoretical brightness value of each sub-pixel under each target gray scale ;
  • the compensation sensing model is generated according to the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • the display screen has m target gray levels
  • the first target gray level is any gray level among the m target gray levels
  • the m is an integer greater than or equal to 1
  • the The reference brightness value is the difference between the theoretical brightness value and the initial brightness value
  • the initial brightness value of each sub-pixel is the brightness value sensed by the corresponding photosensitive unit when the display screen displays a black screen
  • the method further includes:
  • the multiple sub-pixels are sensed by the multiple photosensitive units to obtain the theoretical brightness value of each sub-pixel under each target gray scale ;
  • the compensation sensing model is generated according to the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • the multiple sub-pixels are sensed by the multiple photosensitive units to obtain each sub-pixel under each target gray level
  • the theoretical brightness value including:
  • the multiple sub-pixels are sensed by the multiple photosensitive units to obtain the brightness value of each sub-pixel under each target gray scale;
  • each sub-pixel determines the brightness value of each sub-pixel as the theoretical brightness value of each sub-pixel under each target gray scale
  • the sensing parameter value of the photosensitive unit corresponding to each sub-pixel is adjusted so that each photosensitive unit uses the adjusted sensing parameter value
  • the brightness value obtained by sensing the corresponding sub-pixel is within the preset brightness value range, and the brightness value obtained by sensing the corresponding sub-pixel with the adjusted sensing parameter value of each photosensitive unit is determined as The theoretical brightness value of the sub-pixel at each target gray scale.
  • the sensing parameter values of the photosensitive unit include the illumination time and the integrated capacitance value
  • the adjusting the sensing parameter values of the photosensitive unit corresponding to each sub-pixel includes: according to the priority of the illumination time and the integrated capacitance value To adjust at least one of the illumination time and the integrated capacitance value of the photosensitive unit corresponding to each sub-pixel, the priority of the illumination time is higher than the priority of the integrated capacitance value.
  • the method before determining whether the brightness value of each sub-pixel is within a preset brightness value range, the method further includes:
  • the plurality of sub-pixels are sensed by the plurality of photosensitive units to obtain the initial brightness value of each sub-pixel;
  • the determining whether the brightness value of each sub-pixel is within a preset brightness value range includes: determining whether the corrected brightness value of each sub-pixel is within a preset brightness value range.
  • the reference brightness value is a theoretical brightness value.
  • the method further includes:
  • the reference brightness value of each sub-pixel in the compensation sensing model is updated using the actual brightness value of each sub-pixel.
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value.
  • the method further includes:
  • the plurality of sub-pixels are sensed by the plurality of photosensitive units to obtain the initial brightness value of each sub-pixel;
  • the reference brightness value of each sub-pixel in the compensation sensing model is updated.
  • a pixel compensation device which is applied to a display screen.
  • the display screen includes a plurality of sub-pixels and a plurality of photosensitive units that correspond to the plurality of sub-pixels in one-to-one correspondence.
  • the device includes:
  • a sensing sub-circuit configured to sense the plurality of sub-pixels through the plurality of photosensitive units under the first target gray scale of the display screen to obtain the actual brightness value of each sub-pixel;
  • the first determining sub-circuit is used to determine the theoretical brightness value of each sub-pixel under the first target gray scale according to the compensation sensing model, and the compensation sensing model is used to record the target gray scale and theoretical pixel data
  • the theoretical pixel data includes a reference luminance value of each sub-pixel, and the theoretical luminance value of each sub-pixel corresponds to the reference luminance value of each sub-pixel one-to-one;
  • the compensation sub-circuit is used to perform pixel compensation on each sub-pixel according to the actual brightness value of each sub-pixel and the theoretical brightness value of each sub-pixel.
  • the compensation sub-circuit is used for:
  • the brightness of each sub-pixel is adjusted to perform pixel compensation for each sub-pixel.
  • the compensation sub-circuit is used for:
  • the compensation error is determined according to a compensation error formula, and the compensation error formula is as follows:
  • ⁇ E represents the compensation error
  • x represents the theoretical brightness value
  • k is the compensation factor
  • k is a constant greater than 0.
  • the compensation sensing model is used to record a one-to-one correspondence between the target gray scale, theoretical pixel data and theoretical sensing data.
  • the theoretical sensing data includes the theoretical sensing parameter values of each photosensitive unit.
  • the theoretical sensing parameter value of each photosensitive unit is the sensing parameter value when each photosensitive unit senses the corresponding sub-pixel and obtains the corresponding theoretical brightness value.
  • the device further includes:
  • the second determining sub-circuit is used for sensing a plurality of sub-pixels through a plurality of photosensitive units under the first target gray scale of the display screen, and obtaining the actual brightness value of each sub-pixel from the compensation sensing model Determine the theoretical sensing data corresponding to the first target gray scale;
  • the sensing sub-circuit is used for sensing the plurality of sub-pixels with the corresponding theoretical sensing parameter values under the first target gray scale through the plurality of photosensitive units to obtain the actual value of each sub-pixel Brightness value.
  • the display screen has m target gray levels
  • the first target gray level is any gray level among the m target gray levels
  • the m is an integer greater than or equal to 1
  • the The reference brightness value is the theoretical brightness value
  • the device further includes:
  • the compensation sensing model is generated according to the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • the display screen has m target gray levels
  • the first target gray level is any gray level among the m target gray levels
  • the m is an integer greater than or equal to 1
  • the The reference brightness value is the difference between the theoretical brightness value and the initial brightness value.
  • the initial brightness value of each sub-pixel is the brightness value sensed by the corresponding photosensitive unit when the display screen displays a black screen.
  • the device further includes:
  • the compensation sensing model is generated according to the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • the generating sub-circuit is used to:
  • the multiple sub-pixels are sensed by the multiple photosensitive units to obtain the brightness value of each sub-pixel under each target gray level;
  • each sub-pixel determines the brightness value of each sub-pixel as the theoretical brightness value of each sub-pixel under each target gray scale
  • the sensing parameter value of the photosensitive unit corresponding to each sub-pixel is adjusted so that each photosensitive unit uses the adjusted sensing parameter value
  • the brightness value obtained by sensing the corresponding sub-pixel is within the preset brightness value range, and the brightness value obtained by sensing the corresponding sub-pixel with the adjusted sensing parameter value of each photosensitive unit is determined as The theoretical brightness value of the sub-pixel at each target gray scale.
  • the sensing parameter values of the photosensitive unit include illumination time and integrated capacitance value
  • the generating sub-circuit is used to: adjust the photosensitivity corresponding to each sub-pixel according to the priority of illumination time and integrated capacitance value At least one of the illumination time and the integrated capacitance value of the unit, the priority of the illumination time is higher than the priority of the integrated capacitance value.
  • the device further includes:
  • the plurality of sub-pixels are sensed by the plurality of photosensitive units to obtain each The initial brightness value of each sub-pixel;
  • the first generating sub-circuit or the second generating sub-circuit is used to determine whether the corrected brightness value of each sub-pixel is within a preset brightness value range.
  • the reference brightness value is a theoretical brightness value
  • the device further includes:
  • the first update subcircuit is used to:
  • the reference luminance value of each sub-pixel in the compensation sensing model is updated using the actual luminance value of each sub-pixel.
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value
  • the device further includes:
  • the second update subcircuit is used to:
  • the plurality of sub-pixels are sensed by the plurality of photosensitive units to obtain the initial brightness value of each sub-pixel;
  • the reference brightness value of each sub-pixel in the compensation sensing model is updated.
  • a storage medium in which instructions are stored in the storage medium, and when the instructions run on a processing component, the processing component is caused to execute any one of the first aspect or any optional aspect of the first aspect Pixel compensation method.
  • a pixel compensation device including:
  • a memory for storing executable instructions of the processor
  • the processor is configured to execute the instructions stored in the memory to implement the pixel compensation method described in the first aspect or any optional manner of the first aspect.
  • a display screen comprising: a plurality of sub-pixels, a plurality of photosensitive units in one-to-one correspondence with the plurality of sub-pixels, and the second aspect or any optional manner of the second aspect Pixel compensation device; or,
  • the method includes: a plurality of sub-pixels, a plurality of photosensitive units that correspond to the plurality of sub-pixels in one-to-one correspondence, and the pixel compensation device according to the fourth aspect or any optional manner of the fourth aspect;
  • each photosensitive unit is used to sense the corresponding sub-pixel.
  • FIG. 1 is a front view of a display screen provided by an embodiment of the present disclosure.
  • FIG. 2 is a sensing circuit diagram of a display screen provided by an embodiment of the present disclosure.
  • FIG. 3 is a method flowchart of a pixel compensation method provided by an embodiment of the present disclosure.
  • FIG. 4 is a method flowchart of another pixel compensation method provided by an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a method for generating a compensation sensing model provided by an embodiment of the present disclosure.
  • FIG. 6 is a flowchart of a method for determining a theoretical brightness value of a sub-pixel provided by an embodiment of the present disclosure.
  • FIG. 7 is a flowchart of another method for generating a compensation sensing model provided by an embodiment of the present disclosure.
  • FIG. 8 is a flowchart of a method for performing pixel compensation on a sub-pixel provided by an embodiment of the present disclosure.
  • FIG. 9 is a flowchart of a method for updating a compensation sensing model provided by an embodiment of the present disclosure.
  • FIG. 10 is a flowchart of another method for updating a compensation sensing model provided by an embodiment of the present disclosure.
  • FIG. 11 is a block diagram of a pixel compensation device provided by an embodiment of the present disclosure.
  • FIG. 12 is a block diagram of another pixel compensation device provided by an embodiment of the present disclosure.
  • FIG. 13 is a block diagram of yet another pixel compensation device provided by an embodiment of the present disclosure.
  • FIG. 14 is a block diagram of yet another pixel compensation device provided by an embodiment of the present disclosure.
  • FIG. 15 is a block diagram of yet another pixel compensation device provided by an embodiment of the present disclosure.
  • the pixel compensation method in the related art is usually an optical compensation method.
  • the compensation process is: before the OLED display is shipped from the factory, the OLED display is lit with each feature gray level of multiple feature gray levels, and each feature After lighting the OLED display in gray scale, a charge-coupled device (CCD) is used to take a picture of the OLED display to obtain the characteristic image of the OLED display, and the characteristic image is analyzed to obtain each sub-pixel of the OLED display in the corresponding
  • the brightness value under the characteristic gray scale, the brightness value of each sub-pixel under the corresponding characteristic gray scale is taken as the compensated brightness value of each sub-pixel under the characteristic gray scale, according to each sub-pixel under multiple characteristic gray scales
  • the compensated brightness value models the OLED display screen to obtain the characteristic curve of gray scale and compensated brightness.
  • the OLED display When performing pixel compensation on the OLED display, the OLED display is lit in a certain gray scale, the ideal brightness value corresponding to the gray scale is determined according to the corresponding relationship between the gray scale and the ideal brightness, and then according to the characteristics of the gray scale and the compensated brightness The curve determines the actual gray level corresponding to the compensated brightness value equal to the ideal brightness value, and uses the actual gray level of each sub-pixel to compensate the brightness of the corresponding sub-pixel under the certain gray level.
  • the organic light-emitting layer in the OLED display will gradually age with increasing use time, making the OLED display age, and the uniformity of the displayed image of the OLED display after aging is reduced.
  • the above pixel compensation method can only be used in OLED The pixel compensation is performed before the display leaves the factory, so it cannot compensate for the aging of the pixels of the OLED display, resulting in a low uniformity of the picture displayed on the OLED display.
  • FIG. 1 is a front view of a display screen provided by an embodiment of the present disclosure.
  • the display screen may be an OLED display screen or a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, QLED) display screen.
  • QLED Quantum Dot Light Emitting Diodes
  • the display screen includes a matrix A plurality of pixels 10 arranged in a shape, each pixel 10 includes a plurality of sub-pixels, and the sub-pixel array on the display screen is arranged to form a plurality of pixel columns, and the display screen further includes a plurality of photosensitive units corresponding to the plurality of sub-pixels in one-to-one correspondence , A plurality of data lines 20 corresponding to a plurality of pixel columns in a one-to-one correspondence and a control circuit (not shown in FIG. 1) connected to a plurality of photosensitive cells, the control circuit may be a control integrated circuit (IC), Each photosensitive unit may include a photosensitive element 30 and a processing element (not shown in FIG.
  • each photosensitive element 30 is disposed around the corresponding sub-pixel and the distance from the corresponding sub-pixel is less than a preset distance, each photosensitive The unit is used for sensing the corresponding sub-pixel to obtain the brightness value of the corresponding sub-pixel, and each data line 20 is connected to each sub-pixel in the corresponding plurality of pixel columns.
  • each pixel 10 includes a red sub-pixel 101, a green sub-pixel 102, a blue sub-pixel 103 and a white sub-pixel 104, and each photosensitive element 30 is disposed around the corresponding sub-pixel.
  • the photosensitive element 30 corresponding to the red sub-pixel 101 is disposed above the red sub-pixel 101 as shown in FIG. 1.
  • the positional relationship between the sub-pixels and the photosensitive element 30 shown in FIG. 1 is only a schematic illustration. In practical applications, the photosensitive element 30 can be placed at any position around the corresponding sub-pixel, as long as the photosensitive unit can It is sufficient to accurately sense the corresponding sub-pixels.
  • FIG. 2 is a sensing circuit diagram of the display screen shown in FIG. 1.
  • the photosensitive unit includes a photosensitive element and a processing element.
  • the photosensitive element includes a sensor (Sensor) and a sensor switch (SENSE_SW) connected to the sensor.
  • Sensor Sensor
  • SENSE_SW sensor switch
  • the processing element includes Current integrator, low-pass filter (LPF), integrating capacitor (Cf), correlated double sampling circuit (Correlated Double Sampling, CDS) 1A, CDS2A, CDS1B, CDS2B, first switch INTRST, second switch FA As well as an integrated data selector (multiplexer, MUX) and analog-to-digital converter (Analog-ro-Digital Converter, ADC), the first input terminal of the current integrator is connected to the Sensor through SENSE_SW, and the second input terminal of the current integrator It is connected to the thin film transistor (TFT) of the sub-pixel. The output terminal of the current integrator is connected to one end of the LPF.
  • the other end of the LPF is connected to the first end of the CDS1A, the first end of the CDS2A, and the first end of the CDS1B.
  • the second end of CDS1A, the second end of CDS2A, the second end of CDS1B and the second end of CDS2B are respectively connected to the integrated MUX and ADC, and the two ends of Cf are respectively connected to the current integrator
  • the first input terminal and the output terminal are connected, the first switch INTRST is connected to both ends of Cf, and the second switch FA is connected to both ends of LPF.
  • SENSE_SW is used to control the Sensor to sense the light emitted by the sub-pixel (LIGHT) to obtain a current signal, and transmit the sensed current signal to the current integrator, and then the current integrator, LPF, CDS, MUX, and ADC sequentially The luminance value of the sub-pixel obtained by processing the current signal.
  • LIGHT sub-pixel
  • MUX current integrator
  • ADC ADC sequentially The luminance value of the sub-pixel obtained by processing the current signal.
  • the MUX can select the current signals output by the multiple photosensitive elements so that The current signals output by the multiple photosensitive elements are input to the processing unit in a time-sharing manner, and the processing unit processes the current signals transmitted by each photosensitive element to obtain the brightness value of the corresponding sub-pixel.
  • An embodiment of the present disclosure provides a pixel compensation method, which can be applied to the display screen shown in FIG. 1.
  • the pixel compensation method can be performed by a control IC of the display screen, which can be a timing controller (Timer Control, TCON), please refer to FIG. 3, the pixel compensation method may include the following steps:
  • Step 301 Under the first target gray scale of the display screen, multiple sub-pixels are sensed by multiple photosensitive units to obtain the actual brightness value of each sub-pixel.
  • Step 302 Determine the reference brightness value of each sub-pixel under the first target gray scale according to the compensation sensing model.
  • the compensation sensing model is used to record the corresponding relationship between the target gray scale and the theoretical pixel data.
  • the theoretical pixel data includes the reference luminance value of each sub-pixel.
  • Step 303 Determine the theoretical brightness value of each sub-pixel according to the reference brightness value of each sub-pixel.
  • the theoretical luminance value of each sub-pixel corresponds to the reference luminance value of each sub-pixel one-to-one.
  • Step 304 Perform pixel compensation on each sub-pixel according to the actual luminance value of each sub-pixel and the theoretical luminance value of each sub-pixel.
  • the theoretical brightness value of each sub-pixel under the first target gray scale can be determined according to the compensation sensing model.
  • the theoretical brightness value needs to be calculated according to the reference brightness value, in which case step 303 needs to be performed to obtain the theoretical brightness value.
  • the theoretical brightness value is the reference brightness value, and step 303 may be omitted at this time.
  • the pixel compensation method provided by the embodiment of the present disclosure, because the display screen can sense the sub-pixel through the photosensitive unit to obtain the actual luminance value of the sub-pixel, and determine the theoretical luminance value of the sub-pixel according to the compensation sensing model , And then perform pixel compensation on the sub-pixel according to the theoretical brightness value and the actual brightness value of the sub-pixel, thereby implementing pixel compensation during the use of the display screen, so as to compensate for the aging of the display screen and improve the display screen. Display the uniformity of the picture.
  • FIG. 4 is a flowchart of another pixel compensation method according to an embodiment of the present disclosure.
  • the pixel compensation method may be performed by a control IC of a display screen, and the control IC may be TCON, the pixel compensation method.
  • the following steps can be included:
  • Step 401 Generate a compensation sensing model.
  • the compensation sensing model is used to record the correspondence between the target gray scale and the theoretical pixel data. Further, the compensation sensing model is used to record the one-to-one correspondence between the target gray scale, the theoretical pixel data and the theoretical sensing data.
  • the display screen has m target gray levels, and m is an integer greater than or equal to 1.
  • the m target gray levels are m gray levels selected from a plurality of gray levels of the display screen, for example, a display screen With 256 gray levels of L0 to L255, the m target gray levels may be m target gray levels selected from the 256 gray levels, and the m target gray levels may be gray levels L1, gray levels L3, gray Order L5 and so on. As shown in FIG.
  • the display screen includes a plurality of sub-pixels and a plurality of photosensitive units corresponding to the plurality of sub-pixels, each photosensitive unit is used to sense a corresponding sub-pixel, and the theoretical pixel data includes a reference for each sub-pixel
  • the theoretical sensing data includes the theoretical sensing parameter value of each photosensitive unit
  • the theoretical sensing parameter value of each photosensitive unit is the sensing parameter value when each photosensitive unit senses the corresponding sub-pixel.
  • the reference brightness value may be a theoretical brightness value, or a difference between the theoretical brightness value and the initial brightness value, and the initial brightness value of each sub-pixel is the brightness value sensed by the corresponding photosensitive unit when the display screen displays a black screen. That is, the theoretical brightness value of each sub-pixel corresponds to the reference brightness value of each sub-pixel one-to-one.
  • this step 401 may include any one of the following two implementation manners.
  • step 401 the reference brightness value is the theoretical brightness value.
  • FIG. 5 is a flowchart of a method for generating a compensation sensing model provided by an embodiment of the present disclosure. The method may include the following steps:
  • Sub-step 4011a Under each target gray level of the m target gray levels, multiple sub-pixels are sensed by multiple photosensitive cells to obtain the theoretical brightness value of each sub-pixel under each target gray level.
  • FIG. 6 is a flowchart of a method for obtaining a theoretical brightness value of a sub-pixel by sensing a sub-pixel through a photosensitive unit according to an embodiment of the present disclosure.
  • the method may include the following steps:
  • Sub-step 4011a1 when a black screen is displayed on the display screen, multiple sub-pixels are sensed by multiple photosensitive units to obtain the initial brightness value of each sub-pixel.
  • the gray scale of the display screen can be adjusted to gray scale L0, so that the display screen displays a black screen, and then control multiple photosensitive units to sense multiple sub-pixels, at this time the brightness value sensed by each photosensitive unit It may be the initial brightness value of the corresponding sub-pixel.
  • the photosensitive unit includes a photosensitive element and a processing element, and the photosensitive element includes a sensor and a sensor switch, so controlling the photosensitive unit to sense the corresponding sub-pixel may include: controlling the sensor switch to close to make the sensor work so that the sensor can sense When the brightness signal is measured, the processing element processes the brightness signal to obtain a brightness value.
  • the brightness signal output by the photosensitive element is a current signal used to characterize the brightness value of its corresponding sub-pixel, and the final brightness value of the sub-pixel is processed by the processing element to process the current signal The resulting brightness value.
  • the display screen includes sub-pixel A, sub-pixel B, sub-pixel C, and sub-pixel D.
  • Sub-pixel A corresponds to photosensitive unit A
  • sub-pixel B corresponds to photosensitive unit B
  • sub-pixel C corresponds to photosensitive unit C.
  • the pixel D corresponds to the photosensitive unit D, and the initial brightness value of the sub-pixel A is obtained by sensing the sub-pixel A through the photosensitive unit A, and the initial brightness of the sub-pixel B is obtained through sensing the sub-pixel B through the photosensitive unit B
  • the value is b0
  • the initial brightness value of the sub-pixel C is obtained by sensing the sub-pixel C through the photosensitive unit C
  • the initial brightness value of the sub-pixel D is obtained by sensing the sub-pixel D through the photosensitive unit D, And so on.
  • the photosensitive element outputs a current signal, and there is a dark current in the photosensitive element when there is no light irradiation. Therefore, when the display screen displays a black screen, the processing element of the photosensitive unit can respond to the dark output of the photosensitive element.
  • the current determines the brightness value.
  • the display screen displays a black screen the sub-pixel does not emit light, so the brightness value of the sub-pixel is actually 0.
  • the initial brightness value of the sub-pixel described in the embodiments of the present disclosure actually refers to displaying a black screen on the display screen At this time, the brightness value sensed by the photosensitive unit (that is, the processing element determines the brightness value according to the dark current output by the photosensitive element) is not the brightness value of the sub-pixel.
  • the embodiment of the present disclosure displays the display screen as black
  • the brightness value sensed by the photosensitive unit during the picture is called the initial brightness value of the sub-pixel.
  • Sub-step 4011a2 Determine the brightness correction value of each sub-pixel according to the initial brightness value of each sub-pixel.
  • the brightness correction value of each sub-pixel may be the difference between the initial brightness value of each sub-pixel and the initial brightness value of the reference sub-pixel, or the brightness correction value of each sub-pixel may be the The difference between the initial brightness value of a pixel and the average value of the initial brightness values of all sub-pixels on the display screen is not difficult to understand.
  • the brightness correction value of each sub-pixel can be a positive value, a negative value, or 0.
  • the initial brightness value of the sub-pixel A is a0.
  • the initial brightness value of the sub-pixel is b0, a0 is greater than b0 and the difference between a0 and b0 is t, then the brightness correction value of the sub-pixel A is -t; for another example, the initial brightness value of the sub-pixel B is b0, refer to the sub-pixel
  • the initial brightness value of is b0, because the difference between the initial brightness value of sub-pixel B and the initial brightness value of the reference sub-pixel is 0, so the brightness correction value of sub-pixel B is 0; for example, the initial brightness of sub-pixel C
  • the value is c0, the initial brightness value of the reference sub-pixel is b0, c0 is less than b0, and the difference between c0 and b0 is t, then the brightness correction value of the
  • the embodiment of the present disclosure determines the initial brightness value of each sub-pixel And determine the brightness correction value of each sub-pixel according to the initial brightness value of each sub-pixel, so as to subsequently correct the brightness value of each sub-pixel, so as to eliminate the errors of the photosensitive element, current integrator, and TFT that the photosensitive unit senses The influence of the subpixel brightness value.
  • Sub-step 4011a3 Under each target gray level of the m target gray levels, multiple sub-pixels are sensed by multiple photosensitive units to obtain the brightness value of each sub-pixel under each target gray level.
  • the gray scale of the display screen can be adjusted to the target gray scale, and then multiple photosensitive units are controlled to sense multiple sub-pixels.
  • the brightness value sensed by each photosensitive unit can be under the target gray scale The brightness value of the corresponding sub-pixel.
  • sub-step 4011a1 For the process of controlling the photosensitive unit to sense the corresponding sub-pixel, reference may be made to sub-step 4011a1, which will not be repeated in the embodiments of the present disclosure.
  • the m target gray scales include gray scale L1
  • the gray scale of the display screen can be adjusted to gray scale L1
  • multiple photosensitive units are controlled to sense multiple sub-pixels to obtain the multiple sub-pixels under gray scale L1.
  • the brightness value of each sub-pixel for example, the brightness value of the sub-pixel A in the gray level L1 is a, the brightness value of the sub-pixel B is b, the brightness value of the sub-pixel C is c, and so on.
  • Sub-step 4011a4 according to the brightness correction value of each sub-pixel, correct the brightness value of each sub-pixel under each target gray scale.
  • the brightness value of each sub-pixel under the target gray scale and the brightness correction value of each sub-pixel can be added to correct the brightness value of each sub-pixel under the target gray scale.
  • the brightness correction value of the sub-pixel A is -t, and the brightness value of the sub-pixel A at the gray level L1 is a, then the brightness value of the sub-pixel A at the gray level L1 is corrected according to the brightness correction value of the sub-pixel A
  • the post-luminance value can be at; the luminance correction value of sub-pixel B is 0, and the luminance value of sub-pixel B under gray level L1 is b, then the luminance value of sub-pixel B under gray level L1 is adjusted according to the luminance correction value of sub-pixel B
  • the corrected brightness value can be b; the brightness correction value of the sub-pixel C is +t, and the brightness value of the sub-pixel C under the gray level L1 is c, then the sub-pixel C is adjusted according to the brightness correction value of the sub-pixel C
  • the brightness value of the pixel C is corrected to obtain a corrected brightness value of c+t, and so on.
  • Sub-step 4011a5. Determine whether the corrected brightness value of each sub-pixel is within a preset brightness value range. If the brightness value of each sub-pixel is within the preset brightness value range, sub-step 4011a6 is executed; if the brightness value of each sub-pixel is not within the preset brightness value range, sub-step 4011a7 to sub-step 4011a8 are executed.
  • the preset brightness value range includes the upper limit of the brightness value and the lower limit of the brightness value.
  • the brightness value can be compared with the upper limit of the brightness value and the lower limit of the brightness value, respectively, if the brightness value is less than the brightness If the upper limit of the value is greater than the lower limit of the brightness value, the brightness value is within the preset brightness value range, that is, the corrected brightness value of the sub-pixel is within the preset brightness value range. If the brightness value is greater than the upper limit of the brightness value or less than the lower limit of the brightness value, the brightness value is not within the preset brightness value range, that is, the corrected brightness value of the sub-pixel is not within the preset brightness value range.
  • the brightness value of the sub-pixel A is at, and at can be compared with the upper limit of the brightness value and the lower limit of the brightness value respectively, if at is less than the upper limit of the brightness value and greater than the lower limit of the brightness value, then at is within the preset brightness value Within, that is, the brightness value of sub-pixel A after correction is within the preset brightness value range; if at is greater than the upper limit of the brightness value or less than the lower limit of the brightness value, at is not within the preset brightness value range, that is, after correction
  • the brightness value of the pixel A is not within the preset brightness value range.
  • the process of determining the brightness value of the sub-pixel B and the brightness value of the sub-pixel C after correction is similar to this, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4011a6 Determine the brightness value of each sub-pixel as the theoretical brightness value of each sub-pixel at each target gray level.
  • the brightness value of each sub-pixel in sub-step 4011a6 refers to the brightness value of each sub-pixel after correction in sub-step 4011a4.
  • the brightness value at of the corrected sub-pixel A is determined as the theoretical brightness value of the sub-pixel A at the gray level L1 (target gray level); for another example, the brightness value b of the corrected sub-pixel B is determined to be the sub The theoretical brightness value of the pixel B at the gray level L1; for another example, the brightness value c+t of the corrected sub-pixel C is determined as the theoretical brightness value of the sub-pixel C at the gray level L1.
  • Sub-step 4011a7 Adjust the sensing parameter value of the photosensitive unit corresponding to each sub-pixel, so that the brightness value obtained by each photosensitive unit sensing the corresponding sub-pixel with the adjusted sensing parameter value is within the preset brightness value range .
  • the sensing parameter values of the photosensitive unit include the lighting time and the integrated capacitance value.
  • the lighting time and the integrated capacitance value of each photosensitive unit can be adjusted according to the priority.
  • the priority of the illumination time may be higher than the value of the integrated capacitance, that is, the illumination time of the photosensitive unit is adjusted first, when the illumination time of the photosensitive unit can be adjusted When the brightness value of the corresponding sub-pixel is within the preset brightness value range, the integral capacitance value of the photosensitive unit may not be adjusted; when the illumination time of the photosensitive unit cannot be adjusted, the brightness value of the corresponding sub-pixel cannot be within the preset brightness value range When it is within, the integrated capacitance value of the photosensitive unit can be adjusted so that the brightness value of the corresponding sub-pixel is within the preset brightness value range.
  • the sensing parameter value of the photosensitive unit can be adjusted while the corresponding sub-pixel is sensed by the photosensitive unit with the adjusted sensing parameter value until the re-sensed brightness value is within the preset brightness value range Inside.
  • the illumination time of each photosensitive unit is directly proportional to the brightness of the corresponding sub-pixel, that is, the longer the illumination time of each photosensitive unit, the greater the brightness value it senses for the corresponding sub-pixel;
  • the integrated capacitance value of the photosensitive unit is proportional to the upper limit of the brightness value of the preset brightness value range, and inversely proportional to the lower limit of the preset brightness value range, that is, the larger the integrated capacitance value of each photosensitive unit, the preset The larger the brightness value range.
  • the illumination time of the corresponding photosensitive unit may be shortened according to the priority to reduce the brightness value obtained by the photosensitive unit sensing the sub-pixel, Or increase the integrated capacitance value of the photosensitive unit to increase the upper limit of the brightness value of the preset brightness value range, so that the brightness value obtained by the photosensitive unit sensing the corresponding sub-pixel with the adjusted sensing parameter value is at a preset Within the range of brightness values; when the brightness value of the sub-pixel is less than the lower limit of the brightness value of the preset brightness value range, the illumination time of the corresponding photosensitive unit can be extended according to the priority to increase the value obtained by the photosensitive unit sensing the sub-pixel Brightness value, or reduce the integrated capacitance value of the photosensitive unit to reduce the lower limit of the brightness value of the preset brightness value range, so that the photosensitive unit senses the brightness value of the corresponding sub-pixel with the adjusted sensing parameter value It
  • the above sub-step 4011a1 to sub-step 4011a4 need to be executed to re-correct the brightness value of each sub-pixel under each target gray scale, and the disclosure is implemented
  • the sensing parameter value when adjusting the sensing parameter value, set the priority of the illumination time to be higher than the priority of the integrated capacitance value. In this way, when the illumination value of the sub-pixel can be adjusted within the preset brightness value range by adjusting the illumination time There is no need to adjust the integral capacitance value, which simplifies the sensing and adjustment process, thereby simplifying the pixel compensation process and improving the pixel compensation efficiency.
  • Sub-step 4011a8 Determine the brightness value obtained by sensing the corresponding sub-pixel with the adjusted sensing parameter value of each photosensitive unit as the theoretical brightness value of the sub-pixel under each target gray scale.
  • a1 can be determined as the sub-pixel A in the gray level L1
  • the theoretical brightness value if the photosensitive unit B senses the brightness value of the sub-pixel B with the adjusted sensing parameter value, then b1 can be determined as the theoretical brightness value of the sub-pixel B at the gray level L1; for example, The light-sensing unit C senses the brightness value of the sub-pixel C with the adjusted sensing parameter value, then c1 can be determined as the theoretical brightness value of the sub-pixel C at the gray level L1.
  • Sub-step 4012a Determine the theoretical brightness values of multiple sub-pixels under each target gray scale as the theoretical pixel data corresponding to each target gray scale.
  • the theoretical pixel data corresponding to gray level L1 can be Use Table 1 below to represent:
  • Grayscale L1 Theoretical pixel data a1 b1 c1 ...
  • the embodiment of the present disclosure takes the theoretical pixel data corresponding to the gray level L1 as an example for description.
  • the theoretical pixel data corresponding to other target gray levels can refer to Table 1, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4013a Determine the theoretical sensing data corresponding to each target gray scale.
  • the theoretical sensing data corresponding to each target gray scale includes the theoretical sensing parameter value of each photosensitive unit, and the theoretical sensing parameter value of each photosensitive unit is the corresponding value of each photosensitive unit under each target gray scale.
  • the sensing parameter value of the photosensitive unit may be determined as the theoretical sensing parameter value of the photosensitive unit.
  • the theoretical sensing parameter values of multiple photosensitive cells under gray scale are determined as the theoretical sensing data corresponding to each target gray scale.
  • the sensing parameter value when the photosensitive unit A senses the theoretical brightness value is determined as the photosensitive unit
  • the theoretical sensing parameter value of A, the theoretical sensing parameter value of the photosensitive unit A can be Sa1, and so on, the theoretical sensing parameter values of the photosensitive unit B and the photosensitive unit C under the gray scale L1 can be determined, and then Under the gray level L1, the theoretical sensing parameter values of the photosensitive unit A, the photosensitive unit B, and the photosensitive unit C are determined as the theoretical sensing data corresponding to the gray level L1.
  • the embodiment of the present disclosure uses the theoretical sensing data corresponding to the gray scale L1 as an example for description.
  • the theoretical sensing data corresponding to other target gray scales can refer to Table 2, and the embodiments of the present disclosure will not be repeated here.
  • the theoretical sensing parameter value described in sub-step 4013a is The sensing parameter value corresponding to the brightness value sensed by the photosensitive unit in sub-step 4011a3, when it is determined in sub-step 4011a5 that the corrected sub-pixel brightness value is not within the preset brightness value range, the sub-step 4013a
  • the theoretical sensing parameter value is the adjusted sensing parameter value described in sub-step 4011a7.
  • Sub-step 4014a generating a compensated sensing model based on the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • a one-to-one correspondence between target grayscale, theoretical pixel data and theoretical sensing data can be generated based on the theoretical pixel data corresponding to m target grayscales and the theoretical sensing data corresponding to m target grayscales to obtain a sense of compensation ⁇ Measurement model.
  • the compensation sensing model can be stored for later use, and the compensation sensing model can be stored in the display screen (the display screen can include a storage unit) or any control IC capable of interacting with the display screen In the communication storage device, this embodiment of the present disclosure does not limit this.
  • the compensation sensing model may be represented by the following Table 3:
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value
  • the initial brightness value of each sub-pixel is the brightness value sensed by the corresponding photosensitive unit when the display screen displays a black screen.
  • Sub-step 4011b Under each target gray level of the m target gray levels, multiple sub-pixels are sensed by multiple photosensitive units to obtain the theoretical brightness value of each sub-pixel under each target gray level.
  • Sub-step 4012b Determine the difference between the theoretical luminance value of each sub-pixel under each target gray scale and the initial luminance value of each sub-pixel to obtain the reference luminance value of each sub-pixel under each target gray scale.
  • the difference between the theoretical brightness value of each sub-pixel under each target gray scale and the initial brightness value of each sub-pixel can be obtained, and the difference can be used as the reference brightness value of each sub-pixel under each target gray scale .
  • the initial brightness value of sub-pixel C is c0, gray
  • the determination process of the reference luminance value of each sub-pixel under other target gray scales is similar to this, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4013b Determine the reference luminance values of multiple sub-pixels under each target gray scale as the theoretical pixel data corresponding to each target gray scale.
  • the reference brightness value of sub-pixel A under gray level L1 is ⁇ a1
  • the reference brightness value of sub-pixel B is ⁇ b1
  • the reference brightness value of sub-pixel C is ⁇ c1
  • the theoretical pixel data corresponding to gray level L1 can be Use Table 4 below to represent:
  • Grayscale L1 Theoretical pixel data ⁇ a1 ⁇ b1 ⁇ c1 ...
  • the embodiment of the present disclosure uses theoretical pixel data corresponding to the gray scale L1 as an example for description.
  • the theoretical pixel data corresponding to other target gray scales can refer to Table 4, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4014b Determine the theoretical sensing data corresponding to each target gray scale.
  • the theoretical sensing data corresponding to each target gray scale includes the theoretical sensing parameter value of each photosensitive unit, and the theoretical sensing parameter value of each photosensitive unit is the corresponding sub-pixel of each photosensitive unit at each target gray scale Sensing parameter value at the time of sensing.
  • this sub-step 4014b reference may be made to the implementation process of the above-mentioned sub-step 4013a, and the embodiments of the present disclosure will not repeat them here.
  • a compensation sensing model is generated according to the theoretical pixel data corresponding to the m target gray levels and the theoretical sensing data corresponding to the m target gray levels.
  • the implementation process of this sub-step 4015b can refer to the above sub-step 4014a.
  • the difference is that the theoretical pixel data in the compensation sensing model in this sub-step 4015b includes the reference brightness values of multiple sub-pixels, and the reference brightness values are corresponding The difference between the theoretical luminance value of the sub-pixel and the initial luminance value.
  • the compensation sensing model generated in this sub-step 4015b can be expressed with reference to the following Table 5:
  • the compensation in the compensation model in the first implementation includes the difference between the theoretical brightness value of the sub-pixel and its initial brightness value
  • the compensation in the compensation model in the first implementation includes the theoretical brightness value of the sub-pixel.
  • the amount of data in the compensation sensing model is small, which can effectively reduce the storage space occupied by the compensation sensing model.
  • the size of each data (that is, the theoretical brightness value) in the theoretical pixel data recorded by the compensation sensing model is 16 bits.
  • the second implementation manner In the second implementation manner , The size of each data of the theoretical pixel data (that is, the difference between the theoretical brightness value and the initial brightness value) recorded by the compensation sensing model is 8 bits, then the compensation sensing model generated by the second implementation method is used. The amount of data is half of the amount of data in the compensation sensing model generated by the first implementation manner. Therefore, the second implementation manner can reduce the storage space occupied by the compensation sensing model by half.
  • the theoretical pixel data corresponding to the target gray level and the theoretical sensing data corresponding to the target gray level may be linearly fitted to obtain theoretical pixel data corresponding to the other target gray levels in the m target gray levels The theoretical sensing data corresponding to the gray scale of other targets.
  • Step 402 Determine the theoretical sensing data corresponding to the first target gray scale of the display screen from the compensation sensing model.
  • the first target gray scale is any gray scale among m target gray scales.
  • the m target gray scales refer to m target gray scales in the compensation sensing model.
  • the compensation The sensing model records the one-to-one correspondence between the target gray scale, the theoretical pixel data and the theoretical sensing data. Therefore, the compensation sensing model can be queried according to the first target gray scale to obtain the theoretical sensing corresponding to the first target gray scale data.
  • the first target gray scale is gray scale L1
  • the theoretical sensing data corresponding to the first target gray scale obtained by querying the compensation sensing model according to the first target gray scale may be as shown in Table 2 above.
  • Step 403 Adjust the sensing parameter value of each photosensitive unit according to the theoretical sensing data corresponding to the first target gray scale, so that the sensing parameter value of each photosensitive unit is the theoretical sensing parameter value.
  • the theoretical sensing parameter value of each photosensitive unit can be determined from the theoretical sensing data corresponding to the first target gray scale, and then the sensing parameter value of each photosensitive unit can be adjusted to the theoretical sensing parameter value.
  • the theoretical sensing data corresponding to the gray scale L1 is shown in Table 2.
  • the theoretical sensing parameter value of the photosensitive unit A can be determined from the theoretical sensing data shown in Table 2 and the theory of the photosensitive unit B
  • the sensing parameter value is Sb1
  • the theoretical sensing parameter value of the photosensitive unit C is Sc1
  • the sensing parameter value of the photosensitive unit A is adjusted to Sa1
  • the sensing parameter value of the photosensitive unit B is adjusted to Sb1
  • the photosensitive unit C The sensing parameter value of is adjusted to Sc1, and so on.
  • the sensing parameter value includes the illumination time and the integrated capacitance value.
  • the illumination time and the integrated capacitance value of the photosensitive unit can be adjusted at the same time.
  • Step 404 Under the first target gray scale, multiple sub-pixels are sensed by multiple photosensitive units with corresponding theoretical sensing parameter values to obtain the actual brightness value of each sub-pixel.
  • the gray scale of the display screen can be adjusted to the first target gray scale, and then multiple photosensitive units are controlled to sense multiple sub-pixels.
  • the brightness value sensed by each photosensitive unit can be the target gray
  • the actual brightness value of the corresponding sub-pixel in the order Exemplarily, the actual brightness value of sub-pixel A in gray scale L1 is a1′, the actual brightness value of sub-pixel B is b1′, the actual brightness value of sub-pixel C is c1′, and so on.
  • Step 405 Determine the reference brightness value of each sub-pixel under the first target gray scale according to the compensation sensing model.
  • the theoretical pixel data corresponding to each target gray scale in the compensation sensing model includes the reference brightness value of each sub-pixel under each target gray scale, so the compensation sensing can be queried according to the first target gray scale
  • the model obtains the theoretical pixel data corresponding to the first target gray scale, and then determines the reference luminance value of each sub-pixel under the first target gray scale from the theoretical pixel data corresponding to the first target gray scale.
  • step 405 the reference brightness value determined in step 405 is different.
  • step 405 may include any one of the following two implementations .
  • the first implementation (corresponding to the first implementation in step 401): the reference brightness value is the theoretical brightness value, then the theoretical pixel data corresponding to the first target gray scale determined in step 405 may be as shown in Table 1 above, From the theoretical pixel data shown in Table 1 above, it is determined that the reference luminance value of the sub-pixel A at the gray level L1 is a1, the reference luminance value of the sub-pixel B is b1, the reference luminance value of the sub-pixel C is c1, and so on.
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value, then the theoretical pixel data corresponding to the first target gray scale determined in step 405 As shown in Table 4 above, from the theoretical pixel data shown in Table 4 above, the reference brightness value of sub-pixel A under gray level L1 is determined to be ⁇ a1, the reference brightness value of sub-pixel B is ⁇ b1, and the reference brightness value of sub-pixel C Is ⁇ c1, and so on.
  • Step 406 Determine the theoretical brightness value of each sub-pixel according to the reference brightness value of each sub-pixel.
  • determining the theoretical brightness value of each sub-pixel according to the reference brightness value of each sub-pixel in step 406 may include any one of the following two implementations.
  • the first implementation (corresponding to the first implementation in step 401): the reference brightness value is the theoretical brightness value, then the reference brightness value of each sub-pixel can be directly determined as the theoretical brightness value of each sub-pixel.
  • step 405 it is determined that the reference brightness value of sub-pixel A is a1, the reference brightness value of sub-pixel B is b1, and the reference brightness value of sub-pixel C is c1, then a1 can be determined as the theory of sub-pixel A
  • b1 is determined as the theoretical brightness value of the sub-pixel B
  • c1 is determined as the theoretical brightness value of the sub-pixel C.
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value, then the sum of the reference brightness value and the initial brightness value of each sub-pixel Determine the theoretical brightness value for each sub-pixel. For example, in step 405, it is determined that the reference brightness value of sub-pixel A is ⁇ a1, the reference brightness value of sub-pixel B is ⁇ b1, and the reference brightness value of sub-pixel C is ⁇ c1.
  • the theoretical brightness value of each sub-pixel under the first target gray scale can be determined according to the compensation sensing model.
  • Step 407 Perform pixel compensation for each sub-pixel according to the actual luminance value of each sub-pixel and the theoretical luminance value of each sub-pixel.
  • FIG. 8 is a flowchart of a method for performing pixel compensation on a sub-pixel provided by an embodiment of the present disclosure.
  • the method may include the following steps:
  • Sub-step 4071 according to the actual luminance value of each sub-pixel and the theoretical luminance value of each sub-pixel, determine the compensation error of each sub-pixel.
  • the actual brightness value and the theoretical brightness value of each sub-pixel can be substituted into the compensation error formula to calculate the compensation error of each sub-pixel.
  • Sub-step 4072 Determine whether the compensation error of each sub-pixel is within a preset error range. When the compensation error of the sub-pixel is within the preset error range, sub-step 4073 is performed; when the compensation error of the sub-pixel is not within the preset error range, sub-step 4074 is performed.
  • the range of the preset compensation error may be -3 to +3, and the preset error range may be set according to actual needs, which is not limited in the embodiments of the present disclosure.
  • Sub-step 4073 no pixel compensation is performed on the sub-pixels.
  • pixel compensation may not be performed on the sub-pixel.
  • Sub-step 4074 Adjust the brightness of each sub-pixel to perform pixel compensation for each sub-pixel.
  • the brightness of the sub-pixel may be gradually increased or decreased until the actual brightness value of the sub-pixel is equal to its theoretical brightness value, or, the sub-pixel The compensation error is within the preset error range.
  • the brightness of the sub-pixel can be gradually increased or decreased according to a certain ratio, or the brightness of the sub-pixel can be gradually increased or decreased according to a certain brightness value, and the certain ratio can be 5% (percent), 10% or 20%, etc., the certain brightness value may be 1, 2, 3, or 4, etc.
  • the brightness of the sub-pixel is gradually increased, and when the actual brightness value of the sub-pixel is greater than the theoretical brightness value, the brightness of the sub-pixel is gradually decreased.
  • the sub-pixel A For example, assuming that the compensation error ⁇ Ea of the sub-pixel A is not within the preset error range, and the actual brightness value a1′ of the sub-pixel A is greater than the theoretical brightness value a1, the sub-pixel A’s Brightness, so that the actual brightness value of sub-pixel A is equal to its theoretical brightness value a1, or the compensation error of sub-pixel A is within the preset error range; it is assumed that the compensation error ⁇ Ea of sub-pixel A is not within the preset error range, and If the actual brightness value a1' of the sub-pixel A is less than the theoretical brightness value a1, the brightness of the sub-pixel A can be gradually increased by 10%, so that the actual brightness value of the sub-pixel A is equal to its theoretical brightness value a1, or The compensation error of the sub-pixel A is within a preset error range.
  • the compensation error ⁇ Eb of the sub-pixel B is not within the preset error range, and the actual brightness value b1′ of the sub-pixel B is greater than the theoretical brightness value b1, the brightness of the sub-pixel B may be gradually reduced according to the brightness value 2 , So that the actual brightness value of sub-pixel B is equal to its theoretical brightness value b1, or the compensation error of sub-pixel B is within the preset error range; it is assumed that the compensation error ⁇ Eb of sub-pixel B is not within the preset error range, and the sub If the actual brightness value b1' of the pixel B is smaller than the theoretical brightness value b1, the brightness of the sub-pixel B can be gradually increased according to the brightness value 2, so that the actual brightness value of the sub-pixel B is equal to its theoretical brightness value b1, or the sub-pixel The compensation error of B is within the preset error range.
  • the process of adjusting the brightness of each sub-pixel in this sub-step 4074 can be achieved by adjusting the voltage or current input to the driving circuit of the sub-pixel. For example, when the brightness of a certain sub-pixel needs to be increased, The voltage or current input to the driving circuit of the sub-pixel can be increased; when the brightness of a certain sub-pixel needs to be reduced, the voltage or current input to the driving circuit of the sub-pixel can be reduced.
  • Step 408 Update the reference brightness value in the compensation sensing model.
  • updating the reference brightness value in the compensation sensing model in step 408 may include any one of the following two implementations.
  • the reference brightness value is the theoretical brightness value.
  • FIG. 9 is a flowchart of a method for updating a compensation sensing model according to an embodiment of the present disclosure.
  • the method may include the following steps:
  • Sub-step 4081a Determine the actual brightness value of each sub-pixel after adjusting the brightness.
  • step 407 the actual brightness value of each sub-pixel after brightness adjustment can be determined.
  • the actual brightness value of sub-pixel A after brightness adjustment is a2
  • the actual brightness value of sub-pixel B after brightness adjustment is b2
  • the actual brightness value of sub-pixel C after brightness adjustment is c2, and so on.
  • Sub-step 4082a Update the reference luminance value of each sub-pixel in the compensation sensing model using the actual luminance value of each sub-pixel.
  • the actual brightness value of the sub-pixel may be used to overwrite the reference brightness value of the sub-pixel in the compensation sensing model to update the reference brightness value of the sub-pixel.
  • the reference brightness value of subpixel A is a1
  • the reference brightness value of subpixel B is b1
  • the reference brightness value a1 of the subpixel A in the compensation sensing model can be overwritten with the actual brightness value a2 of the subpixel A after the adjusted brightness determined in substep 4081a, and the subpixel of the adjusted brightness determined in substep 4081a
  • the actual brightness value b2 of B covers the reference brightness value b1 of the sub-pixel B in the compensation sensing model
  • the reference brightness value c2 of the sub-pixel C after the brightness adjustment determined in sub-step 4081a covers the reference of the sub-pixel C in the compensation sensing model Brightness value c1, and so on.
  • the updated compensation sensing model can be expressed using the following table 6:
  • the reference brightness value is the difference between the theoretical brightness value and the initial brightness value.
  • FIG. 10 is another update compensation sense provided by an embodiment of the present disclosure.
  • Sub-step 4081b When a black screen is displayed on the display screen, multiple sub-pixels are sensed by multiple photosensitive units to obtain the initial brightness value of each sub-pixel.
  • this sub-step 4081b reference may be made to the above sub-step 4011a1, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4082b Determine the actual brightness value of each sub-pixel after adjusting the brightness.
  • this sub-step 4082b reference may be made to the above-mentioned sub-step 4081a, which is not repeated in the embodiments of the present disclosure.
  • Sub-step 4083b Determine the difference between the actual brightness value of each sub-pixel and the initial brightness value of each sub-pixel. For the implementation process of this sub-step 4083b, reference may be made to the above-mentioned sub-step 4012b, and the embodiments of the present disclosure will not be repeated here.
  • Sub-step 4084b Using the difference between the actual luminance value of each sub-pixel and the initial luminance value of each sub-pixel, update the reference luminance value of each sub-pixel in the compensation sensing model.
  • the difference between the actual luminance value of the sub-pixel and the initial luminance value can be used to cover the reference luminance value of the sub-pixel in the compensation sensing model to The reference brightness value is updated.
  • the reference brightness value of subpixel A in the compensation sensing model is ⁇ a1
  • the reference brightness value of subpixel B is ⁇ b1
  • the reference brightness value of subpixel C is ⁇ c1.
  • the difference between the actual brightness value of the sub-pixel A and the initial brightness value determined in step 4082b is ⁇ a2
  • the difference between the actual brightness value of the sub-pixel B and the initial brightness value is ⁇ b2
  • the actual brightness value and the initial brightness value of the sub-pixel C The difference is ⁇ c2, and so on.
  • the difference ⁇ a2 between the actual brightness value of the sub-pixel A and the initial brightness value can be overwritten with the reference brightness value ⁇ a1 of the sub-pixel A in the compensation sensing model, and covered by the difference ⁇ b2 between the actual brightness value of the sub-pixel B and the initial brightness value
  • the reference luminance value ⁇ b1 of the sub-pixel A in the compensation sensing model, the difference ⁇ c2 between the actual luminance value of the sub-pixel C and the initial luminance value covers the reference luminance value ⁇ c1 of the sub-pixel C in the compensation sensing model, and so on.
  • the updated compensation sensing model can be expressed using Table 7 below:
  • the embodiment of the present disclosure updates the reference brightness value in the compensation sensing model to make the updated reference brightness value more suitable for the actual display effect, which can improve the accuracy of subsequent pixel compensation for the sub-pixels.
  • the display screen is usually lit line by line.
  • the pixel compensation is provided by the solution provided by the embodiment of the present disclosure, after lighting a row of sub-pixels, the pixel compensation of the row of sub-pixels can be performed. (That is, pixel compensation is performed while the display screen is lit). It is also possible to perform pixel compensation on the display screen after all sub-pixels of the display screen are lit, which is not limited in the embodiments of the present disclosure.
  • it can be compensated regularly or in real time during the operation of the display. Timing compensation can be pixel compensation when the display is turned on or off. The timing compensation is not limited by the illumination time.
  • the non-driving time refers to the blanking time between two consecutive images when the display screen displays the image.
  • the display screen dynamically scans a frame of image through the scan point to display a frame of image. The scanning process starts from the upper left corner of the frame image and advances horizontally, while the scan point also moves down at a slower rate . When the scan point reaches the right edge of the image, the scan point quickly returns to the left, and restarts the second line of pixel scanning below the starting point of the first line of pixels.
  • the timing compensation scheme can effectively adjust the illumination time of the photosensitive unit, so that the photosensitive unit can perform more accurate sensing, and quickly perform pixel compensation on the aging sub-pixels of the display.
  • the real-time compensation scheme can be Pixel compensation for the aging sub-pixels of the display screen in a short time.
  • the real-time compensation scheme since the display screen has been displaying the image, the photosensitive unit has been sensing the corresponding sub-pixel, so before performing pixel compensation, the photosensitive unit can be restored to the initial setting at non-driving time. In order to avoid the data of the multiple compensation process (that is, the brightness value) interfere with each other.
  • the real-time compensation can compensate the sub-pixels when the display screen is uneven for a short period of time during display.
  • the theoretical brightness value of the sub-pixel is obtained according to the generated compensation sensing model, and the display screen compensates the theoretical sensing parameter value recorded in the sensing model through the photosensitive unit.
  • the sub-pixel is sensed to obtain the actual brightness value of the sub-pixel, and then the sub-pixel is compensated according to the theoretical brightness value and the actual brightness value of the sub-pixel, thereby implementing pixel compensation during the use of the display screen, which can be targeted.
  • the aging of the display screen is compensated, and the uniformity of the picture displayed on the display screen is improved.
  • the initial brightness value of the sub-pixel sensed when the black screen is displayed on the display screen corrects the theoretical brightness value of the sub-pixel, which can improve the accuracy of the compensation sensing model
  • the actual brightness value of the sub-pixel can be used to update the reference brightness value of the sub-pixel in the compensation sensing model, so as to improve the accuracy of subsequent compensation of the sub-pixel.
  • An embodiment of the present disclosure provides a pixel compensation device 500, which is applied to a display screen, and the display screen includes a plurality of sub-pixels and a plurality of photosensitive units in one-to-one correspondence with the plurality of sub-pixels, and each photosensitive unit is used for the corresponding sub-pixel
  • FIG. 11 is a block diagram of a pixel compensation device according to an embodiment of the present disclosure.
  • the pixel compensation device 500 includes:
  • the sensing sub-circuit 501 is used for sensing a plurality of sub-pixels through a plurality of photosensitive units under the first target gray scale of the display screen to obtain the actual brightness value of each sub-pixel.
  • the first determining sub-circuit 502 is used to determine the theoretical brightness value of each sub-pixel under the first target gray scale according to the compensation sensing model.
  • the compensation sensing model is used to record the correspondence between the target gray scale and the theoretical pixel data.
  • the theoretical pixel data includes the reference brightness value of each sub-pixel, the theoretical brightness value of each sub-pixel and the reference brightness value of each sub-pixel One to one correspondence.
  • the compensation sub-circuit 503 is used to perform pixel compensation for each sub-pixel according to the actual brightness value of each sub-pixel and the theoretical brightness value of each sub-pixel.
  • the pixel compensation device provided by the embodiment of the present disclosure, because the display screen can sense the sub-pixel through the sensing sub-circuit to obtain the actual brightness value of the sub-pixel, and through the first determining sub-circuit and the second determining sub The circuit obtains the theoretical brightness value of the sub-pixel, and then compensates the sub-pixel through the compensation sub-circuit according to the theoretical brightness value and the actual brightness value of the sub-pixel, thereby realizing pixel compensation during the use of the display screen, so as to target the display The aging of the screen is compensated to improve the uniformity of the picture displayed on the display screen.
  • the above compensation sub-circuit 503 is used to:
  • the compensation error of each sub-pixel is determined.
  • the brightness of each sub-pixel is adjusted to perform pixel compensation for each sub-pixel.
  • the compensation sensing model is used to record the one-to-one correspondence between the target gray scale, theoretical pixel data and theoretical sensing data.
  • the theoretical sensing data includes the theoretical sensing parameter values of each photosensitive unit, and the theoretical sensing parameters of each photosensitive unit The value is the value of the sensing parameter when each photosensitive unit senses the corresponding sub-pixel.
  • FIG. 12 is a block diagram of another pixel compensation device according to an embodiment of the present disclosure.
  • the pixel compensation device 500 further includes:
  • the second determining sub-circuit 504 is used for sensing multiple sub-pixels through multiple photosensitive units under the first target gray scale of the display screen, and determining from the compensation sensing model before obtaining the actual brightness value of each sub-pixel The theoretical sensing data corresponding to the first target gray scale.
  • the adjusting sub-circuit 505 is configured to adjust the sensing parameter value of each photosensitive unit according to the theoretical sensing data corresponding to the first target gray scale, so that the sensing parameter value of each photosensitive unit is the theoretical sensing parameter value.
  • the above-mentioned sensing sub-circuit 501 is used to sense a plurality of sub-pixels with corresponding theoretical sensing parameter values through a plurality of photosensitive units under the first target gray scale to obtain the actual brightness value of each sub-pixel .
  • the display screen has m target gray levels, the first target gray level is any gray level among the m target gray levels, m is an integer greater than or equal to 1, the reference brightness can be the theoretical brightness value or the theoretical brightness value and the initial brightness The difference between the values, the initial brightness value of each sub-pixel is the brightness value sensed by the corresponding photosensitive unit when the display screen displays a black picture.
  • the above pixel compensation device 500 further includes:
  • the first generator sub-circuit 506 is used to:
  • each target gray scale of the m target gray scales Before determining the theoretical sensing data corresponding to the first target gray scale from the compensation sensing model, under each target gray scale of the m target gray scales, multiple sub-pixels are sensed by multiple photosensitive units to obtain The theoretical brightness value of each sub-pixel under each target gray scale.
  • the theoretical brightness value of multiple sub-pixels under each target gray scale is determined as the theoretical pixel data corresponding to each target gray scale.
  • the theoretical sensing data includes the theoretical sensing parameter value of each photosensitive unit, and the theoretical sensing parameter value of each photosensitive unit is the sensing when each photosensitive unit senses the corresponding sub-pixel under each target gray scale The parameter value.
  • a compensation sensing model is generated.
  • FIG. 13 is a block diagram of yet another pixel compensation device according to an embodiment of the present disclosure.
  • the pixel compensation device 500 further includes:
  • the second generator sub-circuit 507 is used to:
  • each target gray scale of the m target gray scales Before determining the theoretical sensing data corresponding to the first target gray scale from the compensation sensing model, under each target gray scale of the m target gray scales, multiple sub-pixels are sensed by multiple photosensitive units to obtain The theoretical brightness value of each sub-pixel under each target gray scale.
  • the difference between the theoretical luminance value of each sub-pixel under each target gray scale and the initial luminance value of each sub-pixel is determined to obtain the reference luminance value of each sub-pixel under each target gray scale.
  • the reference luminance values of multiple sub-pixels under each target gray scale are determined as the theoretical pixel data corresponding to each target gray scale.
  • the theoretical sensing data includes the theoretical sensing parameter value of each photosensitive unit, and the theoretical sensing parameter value of each photosensitive unit is the sensing when each photosensitive unit senses the corresponding sub-pixel under each target gray scale The parameter value.
  • a compensation sensing model is generated.
  • the first generating sub-circuit 506 or the second generating sub-circuit 507 is used to:
  • each target gray scale of the m target gray scales multiple sub-pixels are sensed by multiple photosensitive cells to obtain the brightness value of each sub-pixel under each target gray scale.
  • the brightness value of each sub-pixel is determined as the theoretical brightness value of each sub-pixel at each target gray level.
  • each sub-pixel If the brightness value of each sub-pixel is not within the preset brightness value range, adjust the sensing parameter value of the photosensitive unit corresponding to each sub-pixel, so that each photosensitive unit senses the corresponding sub-pixel with the adjusted sensing parameter value
  • the measured brightness value is within the preset brightness value range, and the brightness value obtained by each photosensitive unit sensing the corresponding sub-pixel with the adjusted sensing parameter value is determined as the sub-pixel under each target gray scale The theoretical brightness value.
  • the sensing parameter values of the photosensitive unit include the illumination time and the integrated capacitance value.
  • the above-mentioned first generation sub-circuit 506 or second generation sub-circuit 507 is used to: adjust each parameter according to the priority of the illumination time and the integrated capacitance value At least one of the illumination time and the integrated capacitance value of the photosensitive unit corresponding to each sub-pixel.
  • the priority of the illumination time may be higher than the priority of the integrated capacitance value.
  • the above pixel compensation device 500 further includes:
  • the syndrome circuit 508 is used to:
  • each sub-pixel Before judging whether the luminance value of each sub-pixel is within a preset luminance value range, and when the display screen displays a black screen, multiple sub-pixels are sensed by multiple photosensitive units to obtain the initial luminance value of each sub-pixel.
  • the luminance correction value of each sub-pixel is determined.
  • the brightness value of each sub-pixel under each target gray scale is corrected.
  • the first generating sub-circuit 506 or the second generating sub-circuit 507 is used to determine whether the corrected brightness value of each sub-pixel is within a preset brightness value range.
  • FIG. 14 is a block diagram of yet another pixel compensation device provided by an embodiment of the present disclosure.
  • the pixel compensation device 500 further includes:
  • the first update sub-circuit 509 is used to:
  • the actual brightness value of each sub-pixel after adjusting the brightness is determined.
  • the actual brightness value of each sub-pixel is used to update the reference brightness value of each sub-pixel in the compensation sensing model.
  • FIG. 15 is a block diagram of yet another pixel compensation device provided by an embodiment of the present disclosure.
  • the pixel compensation device 500 further includes: a second Update sub-circuit 510 for:
  • each sub-pixel After adjusting the brightness of each sub-pixel, when the display screen displays a black screen, multiple sub-pixels are sensed by multiple photosensitive units to obtain the initial brightness value of each sub-pixel.
  • the reference luminance value of each sub-pixel in the compensation sensing model is updated.
  • the above-mentioned sensing sub-circuit 501 may be the sensing circuit shown in FIG. 2, the first determining sub-circuit 502, the compensation sub-circuit 503, the second determining sub-circuit 504, the adjusting sub-circuit 505, the first generator
  • the circuit 506, the second generation sub-circuit 507, the correction sub-circuit 508, the first update sub-circuit 509, and the second update sub-circuit 510 may all be TCON processing circuits.
  • the pixel compensation device provided by the embodiment of the present disclosure generates the compensation sensing model through the first generation sub-circuit or the second generation sub-circuit, and obtains the theory of the sub-pixel through the first determination sub-circuit and the second determination sub-circuit Brightness value, the display screen uses the sensing sub-circuit to compensate the theoretical sensing parameter value recorded in the sensing model to sense the sub-pixel to obtain the actual brightness value of the sub-pixel, and then compensates the sub-pixel through the compensation sub-circuit , To achieve pixel compensation during the use of the display screen, which can compensate for the aging of the display screen, and improve the uniformity of the screen displayed on the display screen.
  • the initial brightness value of the sub-pixel sensed when the black screen is displayed on the display screen by the correcting sub-circuit for the sub-pixel Correcting the theoretical brightness value of, can improve the accuracy of the compensation sensing model, and after the sub-pixel is compensated, the actual brightness value of the sub-pixel can be used to compensate through the first update sub-circuit or the second update sub-circuit
  • the reference luminance value of the sub-pixel in the sensing model is updated to improve the accuracy of subsequent compensation of the sub-pixel.
  • An embodiment of the present disclosure provides a storage medium in which instructions are stored.
  • the processing component is caused to execute the pixel compensation method described in the embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a pixel compensation device, including:
  • a memory for storing executable instructions of the processor.
  • the processor is configured to execute instructions stored in the memory to implement the pixel compensation method described in the embodiments of the present disclosure.
  • the display screen may include: a plurality of sub-pixels, a plurality of photosensitive units in one-to-one correspondence with the plurality of sub-pixels, and the pixel compensation device described in the above embodiment, each photosensitive unit For sensing the corresponding sub-pixel, the positional relationship between each photosensitive unit and the corresponding sub-pixel can refer to FIG. 1 and will not be repeated here.
  • the display screen provided by the embodiment of the present disclosure, because the display screen can sense the sub-pixel through the photosensitive unit to obtain the actual brightness value of the sub-pixel, and determine the theoretical brightness value of the sub-pixel according to the compensation sensing model, Furthermore, the sub-pixel is compensated for pixels according to the theoretical brightness value and the actual brightness value of the sub-pixel, thereby implementing pixel compensation during the use of the display screen, so as to compensate for the aging of the display screen and improve the display of the display screen The uniformity of the picture.

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Abstract

本公开是关于一种像素补偿方法及装置、存储介质、显示屏,属于显示技术领域。该方法包括:在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值;根据补偿感测模型,确定第一目标灰阶下,每个子像素的理论亮度值,补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,理论像素数据包括每个子像素的参考亮度值;根据每个子像素的实际亮度值和每个子像素的理论亮度值,对每个子像素进行像素补偿。本公开实现了对显示屏的像素老化进行补偿,提高了显示屏所显示画面的均匀性。本公开用于对显示屏进行补偿。

Description

像素补偿方法及装置、存储介质、显示屏
本申请要求于2019年01月03日提交的申请号为201910005170.1、发明名称为“像素补偿方法及装置、存储介质、显示屏”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域,特别涉及一种像素补偿方法及装置、存储介质、显示屏。
背景技术
随着显示技术的发展,有机发光二极管(Organic Light Emitting Diode,OLED)显示屏因其所具有的自发光、快速响应和宽视角等特点而越来越多地被应用于高性能显示产品当中。为了保证OLED显示屏的质量,需要对OLED显示屏进行像素补偿,以提高其显示画面的均匀性。
发明内容
本公开实施例提供了一种像素补偿方法及装置、存储介质、显示屏。
第一方面,提供了一种像素补偿方法,应用于显示屏,所述显示屏包括多个子像素和与所述多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,所述方法包括:
在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值;
根据补偿感测模型,确定所述第一目标灰阶下,所述每个子像素的理论亮度值,所述补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,所述理论像素数据包括每个子像素的参考亮度值,所述每个子像素的理论亮度值与所述每个子像素的参考亮度值一一对应;
根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿。
可选的,所述根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿,包括:
根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差;
判断所述每个子像素的补偿误差是否处于预设误差范围内;
若所述每个子像素的补偿误差未处于所述预设误差范围内,则调整所述每个子像素的亮度,以对所述每个子像素进行像素补偿。
可选的,所述根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差,包括:
根据补偿误差公式确定所述补偿误差,所述补偿误差公式如下:
ΔE=k×x'-x,
其中,ΔE表示补偿误差,x'表示实际亮度值,x表示理论亮度值,k为补偿因子,k为大于0的常数。
可选的,所述补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,所述理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为所述每个光敏单元对相应的子像素进行感测并得到对应的理论亮度值时的感测参数值,
在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值之前,所述方法还包括:
从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据;
根据所述第一目标灰阶对应的理论感测数据,调整每个光敏单元的感测参数值,使所述每个光敏单元的感测参数值为理论感测参数值;
所述在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值,包括:
在所述第一目标灰阶下,通过所述多个光敏单元以相应的理论感测参数值对所述多个子像素进行感测,得到每个子像素的实际亮度值。
可选的,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值,
在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,所述方法还包括:
在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
将所述每个目标灰阶下所述多个子像素的理论亮度值,确定为所述每个目标灰阶对应的理论像素数据;
确定所述每个目标灰阶对应的理论感测数据;
根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
可选的,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为所述显示屏显示黑画面时相应的光敏单元感测到的亮度值,
在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,所述方法还包括:
在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
确定所述每个目标灰阶下所述每个子像素的理论亮度值与所述每个子像素的初始亮度值的差值,得到所述每个目标灰阶下所述每个子像素的参考亮度值;
将所述每个目标灰阶下所述多个子像素的参考亮度值确定为所述每个目标灰阶对应的理论像素数据;
确定所述每个目标灰阶对应的理论感测数据;
根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
可选的,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值,包括:
在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的亮度值;
判断所述每个子像素的亮度值是否处于预设亮度值范围内;
若所述每个子像素的亮度值处于预设亮度值范围内,则将所述每个子像素的亮度值确定为所述每个子像素在所述每个目标灰阶下的理论亮度值;
若所述每个子像素的亮度值未处于所述预设亮度值范围内,则调整所述每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于所述预设亮度值范围内,并将每 个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为所述子像素在所述每个目标灰阶下的理论亮度值。
可选的,所述光敏单元的感测参数值包括照光时间和积分电容值,所述调整所述每个子像素对应的光敏单元的感测参数值,包括:按照照光时间和积分电容值的优先级,调整所述每个子像素对应的光敏单元的所述照光时间和所述积分电容值中的至少一个,所述照光时间的优先级高于所述积分电容值的优先级。
可选的,在判断所述每个子像素的亮度值是否处于预设亮度值范围内之前,所述方法还包括:
在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
根据所述每个子像素的初始亮度值,确定所述每个子像素的亮度校正值;
根据每个子像素的亮度校正值,对每个目标灰阶下所述每个子像素的亮度值进行校正;
所述判断所述每个子像素的亮度值是否处于预设亮度值范围内,包括:判断校正后的所述每个子像素的亮度值是否处于预设亮度值范围内。
可选的,所述参考亮度值为理论亮度值,在调整所述每个子像素的亮度之后,所述方法还包括:
确定调整亮度后所述每个子像素的实际亮度值;
采用所述每个子像素的实际亮度值更新所述补偿感测模型中,所述每个子像素的参考亮度值。
可选的,所述参考亮度值为理论亮度值与初始亮度值的差值,在调整所述每个子像素的亮度之后,所述方法还包括:
在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
确定调整亮度后所述每个子像素的实际亮度值;
确定所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值;
采用所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值,更新所述补偿感测模型中,所述每个子像素的参考亮度值。
第二方面,提供了一种像素补偿装置,应用于显示屏,所述显示屏包括多 个子像素和与所述多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,所述装置包括:
感测子电路,用于在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值;
第一确定子电路,用于根据补偿感测模型,确定所述第一目标灰阶下,所述每个子像素的理论亮度值,所述补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,所述理论像素数据包括每个子像素的参考亮度值,所述每个子像素的理论亮度值与所述每个子像素的参考亮度值一一对应;
补偿子电路,用于根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿。
可选的,所述补偿子电路,用于:
根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差;
判断所述每个子像素的补偿误差是否处于预设误差范围内;
若所述每个子像素的补偿误差未处于所述预设误差范围内,则调整所述每个子像素的亮度,以对所述每个子像素进行像素补偿。
可选的,所述补偿子电路,用于:
根据补偿误差公式确定所述补偿误差,所述补偿误差公式如下:
ΔE=k×x'-x,
其中,ΔE表示补偿误差,x'表示实际亮度值,x表示理论亮度值,k为补偿因子,k为大于0的常数。
可选的,所述补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,所述理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为所述每个光敏单元对相应的子像素进行感测并得到对应的理论亮度值时的感测参数值,所述装置还包括:
第二确定子电路,用于在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值之前,从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据;
调整子电路,用于根据所述第一目标灰阶对应的理论感测数据,调整每个光敏单元的感测参数值,使所述每个光敏单元的感测参数值为理论感测参数值;
所述感测子电路,用于在所述第一目标灰阶下,通过所述多个光敏单元以 相应的理论感测参数值对所述多个子像素进行感测,得到每个子像素的实际亮度值。
可选的,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值,所述装置还包括:
生成子电路,用于:
在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
将所述每个目标灰阶下所述多个子像素的理论亮度值,确定为所述每个目标灰阶对应的理论像素数据;
确定所述每个目标灰阶对应的理论感测数据;
根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
可选的,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为所述显示屏显示黑画面时相应的光敏单元感测到的亮度值,所述装置还包括:
生成子电路,用于:
在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
确定所述每个目标灰阶下所述每个子像素的理论亮度值与所述每个子像素的初始亮度值的差值,得到所述每个目标灰阶下所述每个子像素的参考亮度值;
将所述每个目标灰阶下所述多个子像素的参考亮度值确定为所述每个目标灰阶对应的理论像素数据;
确定所述每个目标灰阶对应的理论感测数据;
根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
可选的,所述生成子电路,用于:
在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述 多个子像素进行感测,得到所述每个目标灰阶下每个子像素的亮度值;
判断所述每个子像素的亮度值是否处于预设亮度值范围内;
若所述每个子像素的亮度值处于预设亮度值范围内,则将所述每个子像素的亮度值确定为所述每个子像素在所述每个目标灰阶下的理论亮度值;
若所述每个子像素的亮度值未处于所述预设亮度值范围内,则调整所述每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于所述预设亮度值范围内,并将每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为所述子像素在所述每个目标灰阶下的理论亮度值。
可选的,所述光敏单元的感测参数值包括照光时间和积分电容值,所述生成子电路,用于:按照照光时间和积分电容值的优先级,调整所述每个子像素对应的光敏单元的所述照光时间和所述积分电容值中的至少一个,所述照光时间的优先级高于所述积分电容值的优先级。
可选的,所述装置还包括:
校正子电路,用于:
在判断所述每个子像素的亮度值是否处于预设亮度值范围内之前,且在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
根据所述每个子像素的初始亮度值,确定所述每个子像素的亮度校正值;
根据每个子像素的亮度校正值,对每个目标灰阶下所述每个子像素的亮度值进行校正;
所述第一生成子电路或所述第二生成子电路,用于:判断校正后的所述每个子像素的亮度值是否处于预设亮度值范围内。
可选的,所述参考亮度值为理论亮度值,所述装置还包括:
第一更新子电路,用于:
在调整所述每个子像素的亮度之后,确定调整亮度后所述每个子像素的实际亮度值;
采用所述每个子像素的实际亮度值更新所述补偿感测模型中,所述每个子像素的参考亮度值。
可选的,所述参考亮度值为理论亮度值与初始亮度值的差值,所述装置还包括:
第二更新子电路,用于:
在调整所述每个子像素的亮度之后,在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
确定调整亮度后所述每个子像素的实际亮度值;
确定所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值;
采用所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值,更新所述补偿感测模型中,所述每个子像素的参考亮度值。
第三方面,提供了一种存储介质,所述存储介质中存储有指令,当所述指令在处理组件上运行时,使得所述处理组件执行如第一方面或第一方面的任一可选方式所述的像素补偿方法。
第四方面,提供了一种像素补偿装置,包括:
处理器;
用于存储所述处理器的可执行指令的存储器;
其中,所述处理器被配置为执行所述存储器中存储的指令以实现第一方面或第一方面的任一可选方式所述的像素补偿方法。
第五方面,提供了一种显示屏,包括:多个子像素、与所述多个子像素一一对应的多个光敏单元,以及,第二方面或第二方面的任一可选方式所述的像素补偿装置;或者,
包括:多个子像素、与所述多个子像素一一对应的多个光敏单元,以及,第四方面或第四方面的任一可选方式所述的像素补偿装置;
其中,每个光敏单元用于对相应子像素进行感测。
附图说明
为了更清楚地说明本公开的实施例,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的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的附图。
图1是本公开实施例提供的显示屏的正视图。
图2是本公开实施例提供的一种显示屏的感测电路图。
图3是本公开实施例提供的一种像素补偿方法的方法流程图。
图4是本公开实施例提供的另一种像素补偿方法的方法流程图。
图5是本公开实施例提供的一种生成补偿感测模型的方法流程图。
图6是本公开实施例提供的一种确定子像素的理论亮度值的方法流程图。
图7是本公开实施例提供的另一种生成补偿感测模型的方法流程图。
图8是本公开实施例提供的一种对子像素进行像素补偿的方法流程图。
图9是本公开实施例提供的一种更新补偿感测模型的方法流程图。
图10是本公开实施例提供的另一种更新补偿感测模型的方法流程图。
图11是本公开实施例提供的一种像素补偿装置的框图。
图12是本公开实施例提供的另一种像素补偿装置的框图。
图13是本公开实施例提供的再一种像素补偿装置的框图。
图14是本公开实施例提供的又一种像素补偿装置的框图。
图15是本公开实施例提供的又一种像素补偿装置的框图。
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本公开的实施例,并与说明书一起用于解释本公开的原理。
具体实施方式
为了使本公开的目的、技术方案和优点更加清楚,下面将结合附图对本公开作进一步地详细描述,显然,所描述的实施例仅仅是本公开的一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本公开保护的范围。
相关技术中的像素补偿方法通常为光学补偿方法,其补偿过程是:在OLED显示屏出厂前,以多个特征灰阶中的每个特征灰阶点亮OLED显示屏,并在以每个特征灰阶点亮OLED显示屏后,采用电荷耦合器件(Charge-coupled Device,CCD)对OLED显示屏拍照得到OLED显示屏的特征图像,对特征图像进行分析得到OLED显示屏的每个子像素在相应的特征灰阶下的亮度值,将每个子像素在相应的特征灰阶下的亮度值作为该每个子像素在该特征灰阶下的补偿亮度值,根据每个子像素在多个特征灰阶下的补偿亮度值对OLED显示屏进行建模,得到灰阶与补偿亮度的特性曲线。在对OLED显示屏进行像素补偿时,以某一灰阶点亮OLED显示屏,根据灰阶与理想亮度的对应关系,确定该灰阶对应的理想亮度值,然后根据灰阶与补偿亮度的特性曲线确定与该理想亮度值相等的补偿亮度值对应的实际灰阶,采用每个子像素的实际灰阶对相应的子像素在该 某一灰阶下的亮度进行补偿。
但是,OLED显示屏中的有机发光层会随着使用时间的增加而逐渐老化,使得OLED显示屏老化,老化后的OLED显示屏的所显示画面的均匀性下降,上述像素补偿方法只能在OLED显示屏出厂前进行像素补偿,因此其无法对OLED显示屏的像素老化进行补偿,导致OLED显示屏所显示画面的均匀性较低。
请参考图1,图1为本公开实施例提供的显示屏的正视图,该显示屏可以是OLED显示屏或量子点发光二极管(Quantum Dot Light Emitting Diodes,QLED)显示屏,该显示屏包括矩阵状排布的多个像素10,每个像素10包括多个子像素,显示屏上的子像素阵列排布形成多个像素列,该显示屏还包括与多个子像素一一对应的多个光敏单元、与多个像素列一一对应连接的多根数据线20以及与多个光敏单元连接的控制电路(图1中未示出),该控制电路可以是控制集成电路(integrated circuit,IC),每个光敏单元可以包括光敏元件30和处理元件(图1中未示出),光敏元件30设置在相应的子像素的周围且与相应的子像素之间的距离小于预设距离,每个光敏单元用于对相应的子像素进行感测得到相应的子像素的亮度值,每根数据线20与相应的多个像素列中的每个子像素连接。示例的,如图1所示,每个像素10包括:红色子像素101、绿色子像素102、蓝色子像素103和白色子像素104,每个光敏元件30设置在相应的子像素的周围,例如,红色子像素101对应的光敏元件30设置在如图1所示的红色子像素101的上方。需要说明的是,图1所示的子像素与光敏元件30的位置关系仅仅是一示意性说明,实际应用时,光敏元件30可以设置在相应的子像素周围的任意位置,只要保证光敏单元能够对相应的子像素进行准确感测即可。
请参考图2,图2为图1所示的显示屏的感测电路图,光敏单元包括光敏元件和处理元件,光敏元件包括传感器(Sensor)以及与Sensor连接的传感器开关(SENSE_SW),处理元件包括电流积分器、低通滤波器(Low Pass Filter,LPF)、积分电容(Cf)、相关双取样电路(Correlated Double Sampling,CDS)1A、CDS2A、CDS1B、CDS2B、第一开关INTRST、第二开关FA以及集成设置的数据选择器(multiplexer,MUX)和模数转换器(Analog-ro-Digital Converter,ADC),电流积分器的第一输入端通过SENSE_SW与Sensor连接,电流积分器的第二输入端与子像素的薄膜晶体管(Thin Film Transistor,TFT)连接,电流积分器的输出端与LPF的一端连接,LPF的另一端分别与CDS1A的第一端、CDS2A的第一端、CDS1B的第一端和CDS2B的第一端连接,CDS1A的第二端、 CDS2A的第二端、CDS1B的第二端和CDS2B的第二端分别与集成设置的MUX和ADC连接,Cf的两端分别与电流积分器的第一输入端和输出端连接,第一开关INTRST与Cf的两端连接,第二开关FA与LPF的两端连接。SENSE_SW用于控制Sensor对子像素发出的光线(LIGHT)进行感测得到电流信号,并将感测到的电流信号传输至电流积分器,之后由电流积分器、LPF、CDS、MUX和ADC依次对该电流信号进行处理得到的子像素的亮度值。需要说明的是,图1和图2是以多个子像素与多个光敏单元一一对应,每个光敏单元包括光敏元件和处理元件为例进行说明的,实际应用中,每个光敏单元可以仅包括光敏元件,多个光敏元件可以通过MUX与同一处理单元连接,该处理单元的结构与图2所示的处理元件的结构可以相同,MUX可以对多个光敏元件输出的电流信号进行选择,使多个光敏元件输出的电流信号分时输入至处理单元,处理单元对每个光敏元件传输的电流信号进行处理,以得到相应的子像素的亮度值。
本公开实施例提供了一种像素补偿方法,该方法可以应用于图1所示的显示屏,该像素补偿方法可以由显示屏的控制IC执行,该控制IC可以为时序控制器(Timer Control,TCON),请参考图3,该像素补偿方法可以包括以下步骤:
步骤301、在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值。
步骤302、根据补偿感测模型,确定第一目标灰阶下,每个子像素的参考亮度值。
该补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,理论像素数据包括每个子像素的参考亮度值。
步骤303、根据每个子像素的参考亮度值,确定每个子像素的理论亮度值。
在本公开实施例中,每个子像素的理论亮度值与每个子像素的参考亮度值一一对应。
步骤304、根据每个子像素的实际亮度值和每个子像素的理论亮度值,对每个子像素进行像素补偿。
通过上述步骤302和303,即可实现根据补偿感测模型,确定所述第一目标灰阶下,所述每个子像素的理论亮度值。在一种可能的实施方式中,理论亮度值需要根据参考亮度值计算得到,此时需要执行该步骤303以得到理论亮度值。需要说明的是,在另一种可能的实施方式中,理论亮度值为参考亮度值,此时可以省略步骤303。
综上所述,本公开实施例提供的像素补偿方法,由于显示屏可以通过光敏单元对子像素进行感测得到子像素的实际亮度值,并根据补偿感测模型确定该子像素的理论亮度值,进而根据该子像素的理论亮度值和实际亮度值对该子像素进行像素补偿,实现了在显示屏的使用过程中进行像素补偿,从而可以针对显示屏的老化进行补偿,提高了显示屏所显示画面的均匀性。
请参考图4,图4为本公开实施例提供的另一种像素补偿方法的方法流程图,该像素补偿方法可以由显示屏的控制IC来执行,该控制IC可以为TCON,该像素补偿方法可以包括以下步骤:
步骤401、生成补偿感测模型。
其中,补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,进一步的,补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,在本公开实施例中,显示屏具有m个目标灰阶,m为大于或等于1的整数,该m个目标灰阶是从显示屏的多个灰阶中选择的m个灰阶,例如,显示屏具有L0~L255这256个灰阶,该m个目标灰阶可以是从该256个灰阶中选择的m个目标灰阶,该m个目标灰阶可以为灰阶L1、灰阶L3、灰阶L5等。如图1所示,显示屏包括多个子像素以及与多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,理论像素数据包括每个子像素的参考亮度值,理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为该每个光敏单元对相应的子像素进行感测时的感测参数值。
其中,参考亮度值可以为理论亮度值,或者,理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为显示屏显示黑画面时相应的光敏单元感测到的亮度值。也即是,每个子像素的理论亮度值与每个子像素的参考亮度值一一对应。在本公开实施例中,根据参考亮度值的不同,该步骤401可以包括以下两种实现方式中的任意一种。
该步骤401的第一种实现方式:参考亮度值为理论亮度值。则请参考图5,图5为本公开实施例提供的一种生成补偿感测模型的方法流程图,该方法可以包括以下步骤:
子步骤4011a、在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的理论亮度值。
示例的,请参考图6,图6为本公开实施例提供的一种通过光敏单元对子像素进行感测得到子像素的理论亮度值的方法流程图,该方法可以包括以下步骤:
子步骤4011a1、在显示屏显示黑画面时,通过多个光敏单元对多个子像素进行感测,得到每个子像素的初始亮度值。
可选的,可以将显示屏的灰阶调节至灰阶L0,使显示屏显示黑画面,然后控制多个光敏单元对多个子像素进行感测,此时每个光敏单元感测到的亮度值可以为相应的子像素的初始亮度值。如图2所示,光敏单元包括光敏元件和处理元件,光敏元件包括传感器和传感器开关,因此控制光敏单元对相应的子像素进行感测可以包括:控制传感器开关闭合使传感器工作,从而传感器可以感测到亮度信号,处理元件对该亮度信号进行处理得到亮度值。根据图2所示的感测电路不难理解,光敏元件输出的亮度信号是用于表征其对应的子像素的亮度值的电流信号,子像素最终的亮度值是处理元件对该电流信号进行处理得到的亮度值。
示例的,显示屏包括子像素A、子像素B、子像素C和子像素D等,子像素A与光敏单元A对应,子像素B与光敏单元B对应,子像素C与光敏单元C对应,子像素D与光敏单元D对应,通过光敏单元A对子像素A进行感测得到该子像素A的初始亮度值为a0,通过光敏单元B对子像素B进行感测得到该子像素B的初始亮度值为b0,通过光敏单元C对子像素C进行感测得到该子像素C的初始亮度值为c0,通过光敏单元D对子像素D进行感测得到该子像素D的初始亮度值为d0,以此类推。
需要说明的是,光敏元件输出的是电流信号,且在没有光照射的状态下,光敏元件中存在暗电流,因此在显示屏显示黑画面时,光敏单元的处理元件可以根据光敏元件输出的暗电流确定出亮度值。在显示屏显示黑画面时,子像素是不发光的,因此子像素的亮度值实际上为0,本公开实施例中所述的子像素的初始亮度值实际上是指在显示屏显示黑画面时,光敏单元感测到的亮度值(也即是处理元件根据光敏元件输出的暗电流确定出亮度值),并不是子像素的亮度值,本公开实施例为了便于描述,将显示屏显示黑画面时光敏单元感测到的亮度值称为子像素的初始亮度值。
子步骤4011a2、根据每个子像素的初始亮度值,确定每个子像素的亮度校正值。
在本公开实施例中,每个子像素的亮度校正值可以是该每个子像素的初始 亮度值与参考子像素的初始亮度值的差值,或者,每个子像素的亮度校正值可以是该每个子像素的初始亮度值与显示屏上的所有子像素的初始亮度值的平均值的差值,不难理解,每个子像素的亮度校正值可以是正值、负值或0。
本公开实施例以每个子像素的亮度校正值是该每个子像素的初始亮度值与参考子像素的初始亮度值的差值为例,则示例的,子像素A的初始亮度值为a0,参考子像素的初始亮度值为b0,a0大于b0且a0与b0的差值为t,则子像素A的亮度校正值为-t;再例如,子像素B的初始亮度值为b0,参考子像素的初始亮度值为b0,则由于子像素B的初始亮度值与参考子像素的初始亮度值的差值为0,因此子像素B的亮度校正值为0;又例如,子像素C的初始亮度值为c0,参考子像素的初始亮度值为b0,c0小于b0且c0与b0的差值为t,则子像素C的亮度校正值为+t。其中,参考子像素可以根据实际情况选择,例如,参考子像素为显示屏的多个子像素中初始亮度值最低的子像素,或者初始亮度值最高的子像素,或者任一子像素。
需要说明的是,由于光敏元件、电流积分器以及TFT等都存在误差,所以会导致光敏单元对子像素进行感测得到的亮度值存在误差,本公开实施例通过确定每个子像素的初始亮度值并根据每个子像素的初始亮度值确定每个子像素的亮度校正值,以便于后续对每个子像素的亮度值进行校正,以消除光敏元件、电流积分器以及TFT的误差对光敏单元感测到的子像素的亮度值的影响。
子步骤4011a3、在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的亮度值。
可选的,可以将显示屏的灰阶调整至目标灰阶,然后控制多个光敏单元对多个子像素进行感测,此时每个光敏单元感测到的亮度值可以为该目标灰阶下相应的子像素的亮度值。其中,控制光敏单元对相应的子像素进行感测的过程可以参考子步骤4011a1,本公开实施例在此不再赘述。
示例的,m个目标灰阶包括灰阶L1,可以将显示屏的灰阶调整至灰阶L1,然后控制多个光敏单元对多个子像素进行感测,得到灰阶L1下多个子像素中的每个子像素的亮度值,例如,灰阶L1下子像素A的亮度值为a,子像素B的亮度值为b,子像素C的亮度值为c,以此类推。
子步骤4011a4、根据每个子像素的亮度校正值,对每个目标灰阶下每个子像素的亮度值进行校正。
可选的,可以将目标灰阶下每个子像素的亮度值与该每个子像素的亮度校 正值相加,以对目标灰阶下每个子像素的亮度值进行校正。
示例的,子像素A的亮度校正值为-t,且灰阶L1下子像素A的亮度值为a,则根据子像素A的亮度校正值对灰阶L1下子像素A的亮度值进行校正得到校正后的亮度值可以为a-t;子像素B的亮度校正值为0,且灰阶L1下子像素B的亮度值为b,则根据子像素B的亮度校正值对灰阶L1下子像素B的亮度值进行校正得到校正后的亮度值可以为b;子像素C的亮度校正值为+t,且灰阶L1下子像素C的亮度值为c,则根据子像素C的亮度校正值对灰阶L1下子像素C的亮度值进行校正得到校正后的亮度值可以为c+t,以此类推。
子步骤4011a5、判断校正后的每个子像素的亮度值是否处于预设亮度值范围内。若每个子像素的亮度值处于预设亮度值范围内,则执行子步骤4011a6;若每个子像素的亮度值未处于预设亮度值范围内,则执行子步骤4011a7至子步骤4011a8。
其中,预设亮度值范围包括亮度值上限和亮度值下限,对于校正后的每个子像素的亮度值,可以将该亮度值分别与亮度值上限和亮度值下限进行比较,若该亮度值小于亮度值上限且大于亮度值下限,则该亮度值处于预设亮度值范围内,也即是,校正后的该子像素的亮度值处于预设亮度值范围内。若该亮度值大于亮度值上限或小于亮度值下限,则该亮度值未处于预设亮度值范围内,也即是,校正后的该子像素的亮度值未处于预设亮度值范围内。
示例的,校正后子像素A的亮度值为a-t,可以将a-t分别与亮度值上限和亮度值下限分别进行比较,若a-t小于亮度值上限且大于亮度值下限,则a-t处于预设亮度值范围内,也即是校正后子像素A的亮度值处于预设亮度值范围内;若a-t大于亮度值上限或小于亮度值下限,则a-t未处于预设亮度值范围内,也即是校正后子像素A的亮度值未处于预设亮度值范围内。校正后子像素B的亮度值以及子像素C的亮度值等的判断过程与此类似,本公开实施例在此不再赘述。
子步骤4011a6、将每个子像素的亮度值确定为每个子像素在每个目标灰阶下的理论亮度值。
其中,该子步骤4011a6中每个子像素的亮度值指的是子步骤4011a4中校正后的每个子像素的亮度值。
例如,将校正后子像素A的亮度值a-t确定为该子像素A在灰阶L1(目标灰阶)下的理论亮度值;再例如,将校正后子像素B的亮度值b确定为该子像 素B在灰阶L1下的理论亮度值;又例如,将校正后子像素C的亮度值c+t确定为该子像素C在灰阶L1下的理论亮度值。
子步骤4011a7、调整每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于预设亮度值范围内。
其中,光敏单元的感测参数值包括照光时间和积分电容值,在调整每个子像素对应的光敏单元的感测参数值时,可以按照优先级调整每个光敏单元的照光时间和积分电容值。可选的,在对光敏单元的感测参数值调整时,照光时间的优先级可以高于积分电容值,也即是,先调整光敏单元的照光时间,当通过调整光敏单元的照光时间能够使得相应子像素的亮度值处于预设亮度值范围内时,可以不对光敏单元的积分电容值进行调整;当通过调整光敏单元的照光时间不能够使得相应的子像素的亮度值处于预设亮度值范围内时,可以对该光敏单元的积分电容值进行调整,使相应的子像素的亮度值处于预设亮度值范围内。可选的,可以一边调整光敏单元的感测参数值,一边通过光敏单元以调整后的感测参数值对相应的子像素进行感测,直至重新感测到的亮度值处于预设亮度值范围内。
其中,每个光敏单元的照光时间与相应的子像素的亮度成正比,也即是,每个光敏单元的照光时间越长,其对相应的子像素感测得到的亮度值越大;每个光敏单元的积分电容值与该预设亮度值范围的亮度值上限成正比,与该预设亮度值范围的下限成反比,也即是,每个光敏单元的积分电容值越大,该预设亮度值范围越大。例如,当子像素的亮度值大于预设亮度值范围的亮度值上限时,可以按照优先级缩短相应的光敏单元的照光时间,以减小光敏单元对该子像素进行感测得到的亮度值,或增大光敏单元的积分电容值,以增大该预设亮度值范围的亮度值上限,使光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于预设亮度值范围内;当子像素的亮度值小于预设亮度值范围的亮度值下限时,可以按照优先级延长相应的光敏单元的照光时间,以增大光敏单元对该子像素进行感测得到的亮度值,或减小光敏单元的积分电容值,以减小该预设亮度值范围的亮度值下限,使光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于预设亮度值范围内。
需要说明的是,由于积分电容存在误差,在对积分电容值进行调整之后需要执行上述子步骤4011a1至子步骤4011a4以对每个目标灰阶下每个子像素的亮 度值进行重新校正,本公开实施例在对感测参数值进行调整时,设置照光时间的优先级高于积分电容值的优先级,这样一来,在能够通过调整照光时间使子像素的亮度值处于预设亮度值范围内时,无需对积分电容值进行调整,从而简化了感测以及调整过程,进而简化了像素补偿过程,提高了像素补偿效率。
子步骤4011a8、将每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为该子像素在每个目标灰阶下的理论亮度值。
例如,光敏单元A以调整后的感测参数值对子像素A进行感测得到的亮度值为a1,且a1处于预设亮度值范围内,则可以将a1确定为子像素A在灰阶L1下的理论亮度值。再例如,光敏单元B以调整后的感测参数值对子像素B进行感测得到的亮度值为b1,则可以将b1确定为子像素B在灰阶L1下的理论亮度值;又例如,光敏单元C以调整后的感测参数值对子像素C进行感测得到的亮度值为c1,则可以将c1确定为子像素C在灰阶L1下的理论亮度值。
子步骤4012a、将每个目标灰阶下多个子像素的理论亮度值,确定为每个目标灰阶对应的理论像素数据。
例如,假设灰阶L1下子像素A的理论亮度值为a1,子像素B的理论亮度值为b1,子像素C的理论亮度值为c1,以此类推,则灰阶L1对应的理论像素数据可以采用下表1来表示:
表1
灰阶L1
理论像素数据
a1
b1
c1
...
本公开实施例以灰阶L1对应的理论像素数据为例进行说明,其他目标灰阶对应的理论像素数据可以参考该表1,本公开实施例在此不再赘述。
子步骤4013a、确定每个目标灰阶对应的理论感测数据。
其中,每个目标灰阶对应的理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为每个光敏单元在每个目标灰阶下对相应的子像素进行感测时的感测参数值。可选的,可以将每个目标灰阶下,光敏单元感测到子像素的亮度值为理论亮度值时光敏单元的感测参数值确定为光敏 单元的理论感测参数值,将每个目标灰阶下多个光敏单元的理论感测参数值确定为每个目标灰阶对应的理论感测数据。
示例的,假设光敏单元A在灰阶L1下对子像素A进行感测得到子像素A的理论亮度值,则将光敏单元A感测到该理论亮度值时的感测参数值确定为光敏单元A的理论感测参数值,该光敏单元A的理论感测参数值可以为Sa1,以此类推,可以确定出灰阶L1下光敏单元B以及光敏单元C等的理论感测参数值,然后将灰阶L1下,光敏单元A、光敏单元B和光敏单元C等的理论感测参数值确定为灰阶L1对应的理论感测数据。假设灰阶L1下光敏单元A的理论感测参数值为Sa1,光敏单元B的理论感测参数值为Sb1,光敏单元C的理论感测参数值为Sc1,以此类推,则灰阶L1对应的理论感测数据可以采用下表2来表示:
表2
灰阶L1
理论感测数据
Sa1
Sb1
Sc1
...
本公开实施例以灰阶L1对应的理论感测数据为例进行说明,其他目标灰阶对应的理论感测数据可以参考该表2,本公开实施例在此不再赘述。
需要说明的是,根据上述描述不难理解,当子步骤4011a5中确定出校正后的子像素的亮度值处于预设亮度值范围内时,该子步骤4013a中所述的理论感测参数值为子步骤4011a3中光敏单元感测到的亮度值对应的感测参数值,当子步骤4011a5中确定出校正后的子像素的亮度值未处于预设亮度值范围内时,该子步骤4013a中所述的理论感测参数值为子步骤4011a7中所述的调整后的感测参数值。
子步骤4014a、根据m个目标灰阶对应的理论像素数据和m个目标灰阶对应的理论感测数据,生成补偿感测模型。
可选的,可以根据m个目标灰阶对应的理论像素数据和m个目标灰阶对应的理论感测数据生成目标灰阶、理论像素数据和理论感测数据的一一对应关系,得到补偿感测模型。此外,生成补偿感测模型后,可以对补偿感测模型进行存 储以便于后续使用,可以将补偿感测模型存储在显示屏(显示屏可以包括存储单元)中或者任何能够与显示屏的控制IC通信的存储设备中,本公开实施例对此不做限定。
示例的,在本公开实施例中,补偿感测模型可以采用下表3来表示:
表3
Figure PCTCN2019127488-appb-000001
该步骤401的第二种实现方式:参考亮度值为理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为显示屏显示黑画面时相应的光敏单元感测到的亮度值。则请参考图7,图7是本公开实施例提供的另一种生成补偿感测模型的方法流程图,该方法可以包括以下步骤:
子步骤4011b、在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的理论亮度值。
该子步骤4011b的实现过程可以参考上述子步骤4011a的实现过程,本公开实施例在此不做赘述。
子步骤4012b、确定每个目标灰阶下每个子像素的理论亮度值与每个子像素的初始亮度值的差值,得到每个目标灰阶下每个子像素的参考亮度值。
可以将每个目标灰阶下每个子像素的理论亮度值与该每个子像素的初始亮度值相减得到其差值,并将该差值作为每个目标灰阶下每个子像素的参考亮度值。
示例的,子像素A的初始亮度值为a0,灰阶L1下子像素A的理论亮度值为a1,则灰阶L1下该子像素A的参考亮度值为Δa1=a1-a0;子像素B的初始亮度值为b0,灰阶L1下子像素B的理论亮度值为b1,则灰阶L1下该子像素B的参考亮度值为Δb1=b1-b0;子像素C的初始亮度值为c0,灰阶L1下子像素C的理论亮度值为c1,则灰阶L1下该子像素C的参考亮度值为Δc1=c1-c0,以此类推。其他目标灰阶下各个子像素的参考亮度值的确定过程与此类似,本公开 实施例在此不再赘述。
子步骤4013b、将每个目标灰阶下多个子像素的参考亮度值确定为每个目标灰阶对应的理论像素数据。
例如,灰阶L1下子像素A的参考亮度值为Δa1,子像素B的的参考亮度值为Δb1,子像素C的参考亮度值为Δc1,以此类推,则灰阶L1对应的理论像素数据可以采用下表4来表示:
表4
灰阶L1
理论像素数据
Δa1
Δb1
Δc1
...
本公开实施例以灰阶L1对应的理论像素数据为例进行说明,其他目标灰阶对应的理论像素数据可以参考该表4,本公开实施例在此不再赘述。
子步骤4014b、确定每个目标灰阶对应的理论感测数据。
每个目标灰阶对应的理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为每个光敏单元在每个目标灰阶下对相应的子像素进行感测时的感测参数值。该子步骤4014b的实现过程可以参考上述子步骤4013a的实现过程,本公开实施例在此不做赘述。
子步骤4015b、根据m个目标灰阶对应的理论像素数据和m个目标灰阶对应的理论感测数据,生成补偿感测模型。
该子步骤4015b的实现过程可以参考上述子步骤4014a,不同的是,该子步骤4015b中的补偿感测模型中的理论像素数据包括多个子像素的参考亮度值,且该参考亮度值为相应的子像素的理论亮度值与初始亮度值的差值。示例的,该子步骤4015b中生成的补偿感测模型可以参考下表5来表示:
表5
Figure PCTCN2019127488-appb-000002
Figure PCTCN2019127488-appb-000003
需要说明的是,由于该第二种实现方式中补偿感测模型中的理论像素数据包括子像素的理论亮度值与其初始亮度值的差值,而第一种实现方式中补偿感测模型中的理论像素数据包括子像素的理论亮度值,相比于第一种实现方式,该第二实现方式中,补偿感测模型中的数据量较小,能够有效降低补偿感测模型占用的存储空间。示例的,上述第一种实现方式中,补偿感测模型所记录的理论像素数据中的每个数据(也即是理论亮度值)的大小为16比特(bit),该第二种实现方式中,补偿感测模型所记录的理论像素数据的每个数据(也即是理论亮度值与初始亮度值的差值)的大小为8bit,则采用第二种实现方式生成的补偿感测模型中的数据量为采用第一种实现方式生成的补偿感测模型中的数据量的一半,因此,第二种实现方式能够将补偿感测模型占用的存储空间减小一半。
进一步需要说明的是,实际应用时,在上述生成补偿感测模型的过程中,可以确定m个目标灰阶中的部分目标灰阶对应的理论像素数据和部分目标灰阶对应的理论感测数据,对该部分目标灰阶对应的理论像素数据和该部分目标灰阶对应的理论感测数据进行拟合,得到m个目标灰阶中的其他目标灰阶对应的理论像素数据和其他目标灰阶对应的理论感测数据,以节省生成补偿感测模型的时间。可选的,可以对该部分目标灰阶对应的理论像素数据和该部分目标灰阶对应的理论感测数据进行线性拟合,得到m个目标灰阶中的其他目标灰阶对应的理论像素数据和其他目标灰阶对应的理论感测数据。
步骤402、从补偿感测模型中确定显示屏的第一目标灰阶对应的理论感测数据。
其中,第一目标灰阶为m个目标灰阶中的任一灰阶,该m个目标灰阶指的是补偿感测模型中的m个目标灰阶,根据上述步骤401的描述可知,补偿感测模型中记录的是目标灰阶、理论像素数据和理论感测数据的一一对应关系,因此可以根据第一目标灰阶查询补偿感测模型,得到第一目标灰阶对应的理论感测数据。示例的,第一目标灰阶为灰阶L1,则根据第一目标灰阶查询补偿感测模型得到第一目标灰阶对应的理论感测数据可以如上表2所示。
步骤403、根据第一目标灰阶对应的理论感测数据,调整每个光敏单元的感 测参数值,使每个光敏单元的感测参数值为理论感测参数值。
可以从第一目标灰阶对应的理论感测数据中,确定出每个光敏单元的理论感测参数值,然后将每个光敏单元的感测参数值调整至理论感测参数值。
示例的,灰阶L1对应的理论感测数据如表2所示,则可以从表2所示的理论感测数据中确定出光敏单元A的理论感测参数值为Sa1,光敏单元B的理论感测参数值为Sb1,光敏单元C的理论感测参数值为Sc1,然后将光敏单元A的感测参数值调整至Sa1,将光敏单元B的感测参数值调整至Sb1,将光敏单元C的感测参数值调整至Sc1,以此类推。
需要说明的是,感测参数值包括照光时间和积分电容值,该步骤403中,可以同时对光敏单元的照光时间和积分电容值进行调整。
步骤404、在第一目标灰阶下,通过多个光敏单元以相应的理论感测参数值对多个子像素进行感测,得到每个子像素的实际亮度值。
可选的,可以将显示屏的灰阶调整至第一目标灰阶,然后控制多个光敏单元对多个子像素进行感测,此时每个光敏单元感测到的亮度值可以为该目标灰阶下相应的子像素的实际亮度值。示例的,灰阶L1下子像素A的实际亮度值为a1',子像素B的实际亮度值为b1',子像素C的实际亮度值为c1',以此类推。
步骤405、根据补偿感测模型,确定第一目标灰阶下,每个子像素的参考亮度值。
在本公开实施例中,补偿感测模型中每个目标灰阶对应的理论像素数据包括该每个目标灰阶下每个子像素的参考亮度值,因此可以根据第一目标灰阶查询补偿感测模型,得到第一目标灰阶对应的理论像素数据,然后从第一目标灰阶对应的理论像素数据中确定出第一目标灰阶下,每个子像素的参考亮度值。
针对步骤401中的两种实现方式,该步骤405中确定出的参考亮度值不同。以第一目标灰阶为灰阶L1,且显示屏上的多个子像素包括子像素A、子像素B和子像素C等为例,则该步骤405可以包括以下两种实现方式中的任意一种。
第一种实现方式(与步骤401中的第一种实现方式对应):参考亮度值为理论亮度值,则步骤405中确定的第一目标灰阶对应的理论像素数据可以如上表1所示,从上表1所示的理论像素数据中确定出灰阶L1下子像素A的参考亮度值为a1,子像素B的参考亮度值为b1、子像素C的参考亮度值为c1,以此类推。
第二种实现方式(与步骤401中的第二种实现方式对应):参考亮度值为理论亮度值与初始亮度值的差值,则步骤405中确定的第一目标灰阶对应的理论 像素数据可以如上表4所示,从上表4所示的理论像素数据中确定出灰阶L1下子像素A的参考亮度值为Δa1,子像素B的参考亮度值为Δb1、子像素C的参考亮度值为Δc1,以此类推。
步骤406、根据每个子像素的参考亮度值,确定每个子像素的理论亮度值。
针对步骤401中的两种实现方式,该步骤406中根据每个子像素的参考亮度值确定每个子像素的理论亮度值可以包括以下两种实现方式中的任意一种。
第一种实现方式(与步骤401中的第一种实现方式对应):参考亮度值为理论亮度值,则可以直接将每个子像素的参考亮度值确定为每个子像素的理论亮度值。示例的,在步骤405中确定出子像素A的参考亮度值为a1,子像素B的参考亮度值为b1、子像素C的参考亮度值为c1,则可以将a1确定为子像素A的理论亮度值,将b1确定为子像素B的理论亮度值,将c1确定为子像素C的理论亮度值。
第二种实现方式(与步骤401中的第二种实现方式对应):参考亮度值为理论亮度值与初始亮度值的差值,则可以将每个子像素的参考亮度值与初始亮度值之和确定为每个子像素的理论亮度值。示例的,在步骤405中确定出子像素A的参考亮度值为Δa1,子像素B的参考亮度值为Δb1、子像素C的参考亮度值为Δc1,根据子步骤4011a1可知,子像素A的初始亮度值为a0,子像素B的初始亮度值为b0,子像素C的初始亮度值为c0,则可以将Δa1+a0=a1(具体请参考子步骤4012b)确定为子像素A的理论亮度值,将Δb1+b0=b1(具体请参考子步骤4012b)确定为子像素B的理论亮度值,将Δc1+c0=c1(具体请参考子步骤4012b)确定为子像素C的理论亮度值。
通过上述步骤405和406,即可实现根据补偿感测模型,确定第一目标灰阶下,每个子像素的理论亮度值。
步骤407、根据每个子像素的实际亮度值和每个子像素的理论亮度值,对每个子像素进行像素补偿。
可选的,请参考图8,图8为本公开实施例提供的一种对子像素进行像素补偿的方法流程图,该方法可以包括以下步骤:
子步骤4071、根据每个子像素的实际亮度值和每个子像素的理论亮度值,确定每个子像素的补偿误差。
在本公开实施例中,可以根据补偿误差公式确定补偿误差,补偿误差公式可以为:ΔE=k×x'-x,ΔE表示补偿误差,x'表示实际亮度值,x表示理论亮度 值,k为补偿因子,k为大于0的常数。可以将每个子像素的实际亮度值和理论亮度值代入补偿误差公式计算得到每个子像素的补偿误差。
示例的,子像素A的实际亮度值为a1',理论亮度值为a1,则将a1'和a1代入ΔE=k×x'-x可以得到子像素A的补偿误差为:ΔEa=k×a1'-a1;子像素B的实际亮度值为b1',理论亮度值为b1,则将b1'和b1代入ΔE=k×x'-x可以得到子像素B的补偿误差为:ΔEb=k×b1'-b1;以此类推。
子步骤4072、判断每个子像素的补偿误差是否处于预设误差范围内。当子像素的补偿误差处于预设误差范围内时,执行子步骤4073;当子像素的补偿误差未处于预设误差范围内时,执行子步骤4074。
该子步骤4072的实现过程可以参考上述子步骤4011a5,本公开实施例在此不再赘述。
示例的,该预设补偿误差的范围可以为-3至+3,该预设误差范围可以根据实际需要设置,本公开实施例对此不做限定。
子步骤4073、不对子像素进行像素补偿。
若子步骤4072中确定出子像素的补偿误差处于预设误差范围内,则可以不对该子像素进行像素补偿。
子步骤4074、调整每个子像素的亮度,以对每个子像素进行像素补偿。
可选的,若子像素的补偿误差未处于预设误差范围内,则可以逐渐增大或减小该子像素的亮度,直至该子像素的实际亮度值等于其理论亮度值,或者,该子像素的补偿误差处于预设误差范围内。其中,可以按照一定比例逐渐增大或减小子像素的亮度,或者,按照一定亮度数值逐渐增大或减小子像素的亮度,该一定比例可以是5%(百分之)、10%或20%等,该一定亮度数值可以为1、2、3或4等。其中,当该子像素的实际亮度值小于理论亮度值时,逐渐增大该子像素的亮度,当该子像素的实际亮度值大于理论亮度值时,逐渐减小该子像素的亮度。
示例的,假设子像素A的补偿误差ΔEa未处于预设误差范围内,且子像素A的实际亮度值a1'大于理论亮度值为a1,则可以按照5%的比例逐渐减小子像素A的亮度,以使子像素A的实际亮度值等于其理论亮度值a1,或者使子像素A的补偿误差处于预设误差范围内;假设子像素A的补偿误差ΔEa未处于预设误差范围内,且子像素A的实际亮度值a1'小于理论亮度值为a1,则可以按照10%的比例逐渐增大子像素A的亮度,以使子像素A的实际亮度值等于其理论 亮度值a1,或者使子像素A的补偿误差处于预设误差范围内。
示例的,假设子像素B的补偿误差ΔEb未处于预设误差范围内,且子像素B的实际亮度值b1'大于理论亮度值为b1,则可以按照亮度数值2逐渐减小子像素B的亮度,以使子像素B的实际亮度值等于其理论亮度值b1,或者使子像素B的补偿误差处于预设误差范围内;假设子像素B的补偿误差ΔEb未处于预设误差范围内,且子像素B的实际亮度值b1'小于理论亮度值为b1,则可以按照亮度数值2逐渐增大子像素B的亮度,以使子像素B的实际亮度值等于其理论亮度值b1,或者使子像素B的补偿误差处于预设误差范围内。
需要说明的是,该子步骤4074中调整每个子像素的亮度的过程可以通过调整输入至该子像素的驱动电路的电压或者电流来实现,例如,当需要增大某一子像素的亮度时,可以增大输入至该子像素的驱动电路的电压或者电流;当需要减小某一子像素的亮度时,可以减小输入至该子像素的驱动电路的电压或者电流。
步骤408、更新补偿感测模型中的参考亮度值。
针对步骤401中的两种实现方式,该步骤408中更新补偿感测模型中的参考亮度值可以包括以下两种实现方式中的任意一种。
第一种实现方式(与步骤401中的第一种实现方式对应):参考亮度值为理论亮度值。
请参考图9,图9为本公开实施例提供的一种更新补偿感测模型的方法流程图,该方法可以包括以下步骤:
子步骤4081a、确定调整亮度后每个子像素的实际亮度值。
根据步骤407的描述容易理解,在执行步骤407的过程中,已经可以确定出调整亮度后每个子像素的实际亮度值。示例的,调整亮度后子像素A的实际亮度值为a2,调整亮度后子像素B的实际亮度值为b2,调整亮度后子像素C的实际亮度值为c2,以此类推。
子步骤4082a、采用每个子像素的实际亮度值更新补偿感测模型中,该每个子像素的参考亮度值。
可选的,对于需要更新的子像素的参考亮度值,可以采用该子像素的实际亮度值覆盖补偿感测模型中该子像素的参考亮度值,以对该子像素的参考亮度值进行更新。
示例的,根据子步骤4014a中的表3可知,补偿感测模型中灰阶L1下,子 像素A的参考亮度值为a1,子像素B的参考亮度值为b1,子像素C的参考亮度值为c1,则可以以子步骤4081a中确定的调整亮度后子像素A的实际亮度值a2覆盖补偿感测模型中子像素A的参考亮度值a1,以子步骤4081a中确定的调整亮度后子像素B的实际亮度值b2覆盖补偿感测模型中子像素B的参考亮度值b1,以子步骤4081a中确定的调整亮度后子像素C的实际亮度值c2覆盖补偿感测模型中子像素C的参考亮度值c1,以此类推。假设对补偿感测模型中所有的参考亮度值都进行了更新,则更新后的补偿感测模型可以采用下表6来表示:
表6
Figure PCTCN2019127488-appb-000004
第二种实现方式(与步骤401中的第二种实现方式对应):参考亮度值为理论亮度值与初始亮度值的差值。
当生成的补偿感测模型中记录的每个子像素的参考亮度值为理论亮度值与初始亮度值的差值时,请参考图10,图10为本公开实施例提供的另一种更新补偿感测模型的方法流程图,该方法可以包括以下步骤:
子步骤4081b、在显示屏显示黑画面时,通过多个光敏单元对多个子像素进行感测,得到每个子像素的初始亮度值。该子步骤4081b的实现过程可以参考上述子步骤4011a1,本公开实施例在此不再赘述。
子步骤4082b、确定调整亮度后每个子像素的实际亮度值。该子步骤4082b的实现过程可以参考上述子步骤4081a,本公开实施例在此不再赘述。
子步骤4083b、确定每个子像素的实际亮度值与每个子像素的初始亮度值的差值。该子步骤4083b的实现过程可以参考上述子步骤4012b,本公开实施例在此不再赘述。
子步骤4084b、采用每个子像素的实际亮度值与每个子像素的初始亮度值的差值,更新补偿感测模型中,该每个子像素的参考亮度值。
可选的,对于需要更新的子像素的参考亮度值,可以采用该子像素的实际 亮度值与初始亮度值的差值覆盖补偿感测模型中该子像素的参考亮度值,以对该子像素的参考亮度值进行更新。
示例的,根据子步骤4015b中的表5可知,补偿感测模型中子像素A的参考亮度值为Δa1,子像素B的参考亮度值为Δb1,子像素C的参考亮度值为Δc1,假设子步骤4082b中确定的子像素A的实际亮度值与初始亮度值的差值为Δa2,子像素B的实际亮度值与初始亮度值的差值为Δb2,子像素C的实际亮度值与初始亮度值的差值为Δc2,以此类推。则可以以子像素A的实际亮度值与初始亮度值的差值Δa2覆盖补偿感测模型中子像素A的参考亮度值Δa1,以子像素B的实际亮度值与初始亮度值的差值Δb2覆盖补偿感测模型中子像素A的参考亮度值Δb1,以子像素C的实际亮度值与初始亮度值的差值Δc2覆盖补偿感测模型中子像素C的参考亮度值Δc1,以此类推。假设对补偿感测模型中所有的参考亮度值都进行了更新,则更新后的补偿感测模型可以采用下表7来表示:
表7
Figure PCTCN2019127488-appb-000005
需要说明的是,本公开实施例通过更新补偿感测模型中的参考亮度值,使得更新后的参考亮度值更贴合实际显示效果,这样可以提高后续对子像素进行像素补偿的准确性。
还需要说明的是,实际应用中,显示屏通常是逐行点亮的,本公开实施例提供的方案在进行像素补偿时,可以在点亮一行子像素后,对该一行子像素进行像素补偿(也即是边点亮显示屏边进行像素补偿),也可以在显示屏的所有子像素都点亮后对显示屏进行像素补偿,本公开实施例对此不做限定。此外,在进行像素补偿时,可以定时补偿或者在显示屏工作的过程中实时补偿,定时补偿可以是在显示屏开机或关机时进行像素补偿,该定时补偿不受照光时间的限制,因此,可以快速对子像素进行补偿;实时补偿可以是在子像素的非驱动时 间进行像素补偿,非驱动时间指的是显示屏在显示图像时,连续两帧图像之间的消隐时间。其中,显示屏通过扫描点对一帧图像进行动态扫描来显示一帧图像,扫描的过程是从该帧图像的左上角开始,水平向前行进,同时扫描点也以较慢的速率向下移动。当扫描点到达图像右侧边缘时,扫描点快速返回左侧,重新开始在第一行像素的起点下面进行第二行像素扫描,扫描点扫描完一帧图像后,要从图像的右下角返回到图像的左上角,开始下一帧图像的扫描,从图像的右下角返回到图像的左上角的时间间隔即为连续两帧图像之间的消隐间隔。在定时补偿方案和实时补偿方案中,定时补偿方案可以有效调整光敏单元的照光时间,使光敏单元能够更加准确的进行感测,快速对显示屏的老化子像素进行像素补偿,实时补偿方案可以在短时间内对显示屏的老化子像素进行像素补偿。此外,在实时补偿方案中,由于显示屏一直在显示画面,使得光敏单元一直在对相应的子像素进行感测,所以在进行像素补偿之前,可以先在非驱动时间将光敏单元恢复初始设置,以避免多次补偿过程的数据(也即是亮度值)相互干扰。该实时补偿可以在显示屏显示过程中出现短时间的显示画面不均匀的问题时,对子像素进行补偿。
最后需要说明的是,本公开实施例提供的像素补偿方法步骤的先后顺序可以进行适当调整,步骤也可以根据情况进行相应增减,任何熟悉本技术领域的技术人员在本公开揭露的技术范围内,可轻易想到变化的方法,都应涵盖在本公开的保护范围之内,因此不再赘述。
综上所述,本公开实施例提供的像素补偿方法,根据生成的补偿感测模型得到子像素的理论亮度值,显示屏通过光敏单元以补偿感测模型中记录的理论感测参数值对该子像素进行感测得到该子像素的实际亮度值,进而根据该子像素的理论亮度值和实际亮度值对该子像素进行补偿,实现了在显示屏的使用过程中进行像素补偿,从而可以针对显示屏的老化进行补偿,提高了显示屏所显示画面的均匀性。进一步的,在生成补偿感测模型的过程中,通过显示屏显示黑画面时感测得到的子像素的初始亮度值对该子像素的理论亮度值进行校正,能够提高补偿感测模型的准确性,且在对该子像素进行补偿后,能够采用该子像素的实际亮度值对补偿感测模型中该子像素的参考亮度值进行更新,以提高后续对该子像素进行补偿的准确性。
本公开实施例提供了一种像素补偿装置500,应用于显示屏,该显示屏包括 多个子像素和与多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,则请参考图11,图11为本公开实施例提供的一种像素补偿装置的框图,该像素补偿装置500包括:
感测子电路501,用于在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值。
第一确定子电路502,用于根据补偿感测模型,确定第一目标灰阶下,每个子像素的理论亮度值。该补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,理论像素数据包括每个子像素的参考亮度值,所述每个子像素的理论亮度值与所述每个子像素的参考亮度值一一对应。
补偿子电路503,用于根据每个子像素的实际亮度值和每个子像素的理论亮度值,对每个子像素进行像素补偿。
综上所述,本公开实施例提供的像素补偿装置,由于显示屏可以通过感测子电路对子像素进行感测得到子像素的实际亮度值,并通过第一确定子电路和第二确定子电路得到子像素的理论亮度值,进而通过补偿子电路根据该子像素的理论亮度值和实际亮度值对该子像素进行补偿,实现了在显示屏的使用过程中进行像素补偿,从而可以针对显示屏的老化进行补偿,提高了显示屏所显示画面的均匀性。
可选的,上述补偿子电路503,用于:
根据每个子像素的实际亮度值和每个子像素的理论亮度值,确定每个子像素的补偿误差。
判断每个子像素的补偿误差是否处于预设误差范围内。
若每个子像素的补偿误差未处于预设误差范围内,则调整每个子像素的亮度,以对每个子像素进行像素补偿。
补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为每个光敏单元对相应的子像素进行感测时的感测参数值。
可选的,请参考图12,图12为本公开实施例提供的另一种像素补偿装置的框图,上述像素补偿装置500还包括:
第二确定子电路504,用于在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值之前,从补偿感测模型中确定第一目标灰阶对应的理论感测数据。
调整子电路505,用于根据第一目标灰阶对应的理论感测数据,调整每个光敏单元的感测参数值,使每个光敏单元的感测参数值为理论感测参数值。
可选的,上述感测子电路501,用于在第一目标灰阶下,通过多个光敏单元以相应的理论感测参数值对多个子像素进行感测,得到每个子像素的实际亮度值。
显示屏具有m个目标灰阶,第一目标灰阶为m个目标灰阶中的任一灰阶,m为大于或等于1的整数,参考亮度可以为理论亮度值或者理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为显示屏显示黑画面时相应的光敏单元感测到的亮度值。当参考亮度值为理论亮度值时,如图12所示,上述像素补偿装置500还包括:
第一生成子电路506,用于:
在从补偿感测模型中确定第一目标灰阶对应的理论感测数据之前,在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的理论亮度值。
将每个目标灰阶下多个子像素的理论亮度值,确定为每个目标灰阶对应的理论像素数据。
确定每个目标灰阶对应的理论感测数据。理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为每个光敏单元在每个目标灰阶下对相应的子像素进行感测时的感测参数值。
根据m个目标灰阶对应的理论像素数据和m个目标灰阶对应的理论感测数据,生成补偿感测模型。
当参考亮度值为理论亮度值与初始亮度值的差值时,请参考图13,图13为本公开实施例提供的再一种像素补偿装置的框图,上述像素补偿装置500还包括:
第二生成子电路507,用于:
在从补偿感测模型中确定第一目标灰阶对应的理论感测数据之前,在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的理论亮度值。
确定每个目标灰阶下每个子像素的理论亮度值与每个子像素的初始亮度值的差值,得到每个目标灰阶下每个子像素的参考亮度值。
将每个目标灰阶下多个子像素的参考亮度值确定为每个目标灰阶对应的理 论像素数据。
确定每个目标灰阶对应的理论感测数据。理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为每个光敏单元在每个目标灰阶下对相应的子像素进行感测时的感测参数值。
根据m个目标灰阶对应的理论像素数据和m个目标灰阶对应的理论感测数据,生成补偿感测模型。
可选的,上述第一生成子电路506或第二生成子电路507,用于:
在m个目标灰阶中的每个目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个目标灰阶下每个子像素的亮度值。
判断每个子像素的亮度值是否处于预设亮度值范围内。
若每个子像素的亮度值处于预设亮度值范围内,将每个子像素的亮度值确定为每个子像素在每个目标灰阶下的理论亮度值。
若每个子像素的亮度值未处于预设亮度值范围内,调整每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于预设亮度值范围内,并将每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为子像素在每个目标灰阶下的理论亮度值。
光敏单元的感测参数值包括照光时间和积分电容值,可选的,上述第一生成子电路506或第二生成子电路507,用于:按照照光时间和积分电容值的优先级,调整每个子像素对应的光敏单元的照光时间和积分电容值中的至少一个。示例性的,照光时间的优先级可以高于积分电容值的优先级。
可选的,如图12或图13所示,上述像素补偿装置500还包括:
校正子电路508,用于:
在判断每个子像素的亮度值是否处于预设亮度值范围内之前,且在显示屏显示黑画面时,通过多个光敏单元对多个子像素进行感测,得到每个子像素的初始亮度值。
根据每个子像素的初始亮度值,确定每个子像素的亮度校正值。
根据每个子像素的亮度校正值,对每个目标灰阶下每个子像素的亮度值进行校正。
可选的,上述第一生成子电路506或第二生成子电路507用于:判断校正后的每个子像素的亮度值是否处于预设亮度值范围内。
可选的,当参考亮度值为理论亮度值时,请参考图14,图14为本公开实施例提供的又一种像素补偿装置的框图,上述像素补偿装置500还包括:
第一更新子电路509,用于:
在调整每个子像素的亮度之后,确定调整亮度后每个子像素的实际亮度值。
采用每个子像素的实际亮度值更新补偿感测模型中,每个子像素的参考亮度值。
当参考亮度值为理论亮度值与初始亮度值的差值时,请参考图15,图15为本公开实施例提供的又一种像素补偿装置的框图,上述像素补偿装置500还包括:第二更新子电路510,用于:
在调整每个子像素的亮度之后,在显示屏显示黑画面时,通过多个光敏单元对多个子像素进行感测,得到每个子像素的初始亮度值。
确定调整亮度后每个子像素的实际亮度值。
确定每个子像素的实际亮度值与每个子像素的初始亮度值的差值。
采用每个子像素的实际亮度值与每个子像素的初始亮度值的差值,更新补偿感测模型中,每个子像素的参考亮度值。
需要说明的是,上述感测子电路501可以为图2所示的感测电路,第一确定子电路502、补偿子电路503、第二确定子电路504、调整子电路505、第一生成子电路506、第二生成子电路507、校正子电路508、第一更新子电路509和第二更新子电路510均可以为TCON处理电路。
综上所述,本公开实施例提供的像素补偿装置,通过第一生成子电路或第二生成子电路生成补偿感测模型,通过第一确定子电路和第二确定子电路得到子像素的理论亮度值,显示屏通过感测子电路以补偿感测模型中记录的理论感测参数值对该子像素进行感测得到该子像素的实际亮度值,进而通过补偿子电路对该子像素进行补偿,实现了在显示屏的使用过程中进行像素补偿,从而可以针对显示屏的老化进行补偿,提高了显示屏所显示画面的均匀性。进一步的,在通过第一生成子电路或者第二生成子电路生成补偿感测模型的过程中,通过校正子电路在显示屏显示黑画面时感测得到的子像素的初始亮度值对该子像素的理论亮度值进行校正,能够提高补偿感测模型的准确性,且在对该子像素进行补偿后,能够通过第一更新子电路或者第二更新子电路采用该子像素的实际亮度值对补偿感测模型中该子像素的参考亮度值进行更新,以提高后续对该子像素进行补偿的准确性。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的像素补偿装置的子电路的具体工作过程,可以参考前述方法实施例中的对应过程,本公开实施例在此不再赘述。
本公开实施例提供了一种存储介质,存储介质中存储有指令,当指令在处理组件上运行时,使得处理组件执行本公开实施例所述的像素补偿方法。
本公开实施例提供了一种像素补偿装置,包括:
处理器。
用于存储处理器的可执行指令的存储器。
其中,处理器被配置为执行存储器中存储的指令以实现本公开实施例所述的像素补偿方法。
本公开实施例提供了一种显示屏,该显示屏可以包括:多个子像素、与多个子像素一一对应的多个光敏单元,以及,上述实施例所述的像素补偿装置,每个光敏单元用于对相应的子像素进行感测,每个光敏单元与相应的子像素的位置关系可以参考图1,在此不再赘述。
综上所述,本公开实施例提供的显示屏,由于显示屏可以通过光敏单元对子像素进行感测得到子像素的实际亮度值,并根据补偿感测模型确定该子像素的理论亮度值,进而根据该子像素的理论亮度值和实际亮度值对该子像素进行像素补偿,实现了在显示屏的使用过程中进行像素补偿,从而可以针对显示屏的老化进行补偿,提高了显示屏所显示画面的均匀性。
本领域技术人员在考虑说明书及实践这里公开的发明后,将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本公开的真正范围和精神由权利要求指出。
应当理解的是,本公开并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (25)

  1. 一种像素补偿方法,应用于显示屏,所述显示屏包括多个子像素和与所述多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,所述方法包括:
    在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值;
    根据补偿感测模型,确定所述第一目标灰阶下,所述每个子像素的理论亮度值,所述补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,所述理论像素数据包括每个子像素的参考亮度值,所述每个子像素的理论亮度值与所述每个子像素的参考亮度值一一对应;
    根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿。
  2. 根据权利要求1所述的像素补偿方法,其中,所述根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿,包括:
    根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差;
    判断所述每个子像素的补偿误差是否处于预设误差范围内;
    若所述每个子像素的补偿误差未处于所述预设误差范围内,则调整所述每个子像素的亮度,以对所述每个子像素进行像素补偿。
  3. 根据权利要求2所述的像素补偿方法,其中,所述根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差,包括:
    根据补偿误差公式确定所述补偿误差,所述补偿误差公式如下:
    ΔE=k×x'-x,
    其中,ΔE表示补偿误差,x'表示实际亮度值,x表示理论亮度值,k为补偿因子,k为大于0的常数。
  4. 根据权利要求1至3任一项所述的像素补偿方法,其中,所述补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,所述理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为所述每个光敏单元对相应的子像素进行感测并得到对应的理论亮度值时的感测参数值,
    在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值之前,所述方法还包括:
    从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据;
    根据所述第一目标灰阶对应的理论感测数据,调整每个光敏单元的感测参数值,使所述每个光敏单元的感测参数值为理论感测参数值;
    所述在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值,包括:
    在所述第一目标灰阶下,通过所述多个光敏单元以相应的理论感测参数值对所述多个子像素进行感测,得到每个子像素的实际亮度值。
  5. 根据权利要求4所述的像素补偿方法,其中,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值,
    在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,所述方法还包括:
    在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
    将所述每个目标灰阶下所述多个子像素的理论亮度值,确定为所述每个目标灰阶对应的理论像素数据;
    确定所述每个目标灰阶对应的理论感测数据;
    根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
  6. 根据权利要求4所述的像素补偿方法,其中,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或 等于1的整数,所述参考亮度值为理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为所述显示屏显示黑画面时相应的光敏单元感测到的亮度值,在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,所述方法还包括:
    在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
    确定所述每个目标灰阶下所述每个子像素的理论亮度值与所述每个子像素的初始亮度值的差值,得到所述每个目标灰阶下所述每个子像素的参考亮度值;
    将所述每个目标灰阶下所述多个子像素的参考亮度值确定为所述每个目标灰阶对应的理论像素数据;
    确定所述每个目标灰阶对应的理论感测数据;
    根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
  7. 根据权利要求5或6所述的像素补偿方法,其中,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值,包括:
    在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的亮度值;
    判断所述每个子像素的亮度值是否处于预设亮度值范围内;
    若所述每个子像素的亮度值处于预设亮度值范围内,则将所述每个子像素的亮度值确定为所述每个子像素在所述每个目标灰阶下的理论亮度值;
    若所述每个子像素的亮度值未处于所述预设亮度值范围内,则调整所述每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于所述预设亮度值范围内,并将每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为所述子像素在所述每个目标灰阶下的理论亮度值。
  8. 根据权利要求7所述的像素补偿方法,其中,所述光敏单元的感测参数值包括照光时间和积分电容值,所述调整所述每个子像素对应的光敏单元的感 测参数值,包括:按照照光时间和积分电容值的优先级,调整所述每个子像素对应的光敏单元的所述照光时间和所述积分电容值中的至少一个,所述照光时间的优先级高于所述积分电容值的优先级。
  9. 根据权利要求7或8所述的像素补偿方法,其中,
    在判断所述每个子像素的亮度值是否处于预设亮度值范围内之前,所述方法还包括:
    在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
    根据所述每个子像素的初始亮度值,确定所述每个子像素的亮度校正值;
    根据每个子像素的亮度校正值,对每个目标灰阶下所述每个子像素的亮度值进行校正;
    所述判断所述每个子像素的亮度值是否处于预设亮度值范围内,包括:判断校正后的所述每个子像素的亮度值是否处于预设亮度值范围内。
  10. 根据权利要求2至5任一项所述的像素补偿方法,其中,所述参考亮度值为理论亮度值,在调整所述每个子像素的亮度之后,所述方法还包括:
    确定调整亮度后所述每个子像素的实际亮度值;
    采用所述每个子像素的实际亮度值更新所述补偿感测模型中,所述每个子像素的参考亮度值。
  11. 根据权利要求2至4和权利要求6中的任一项所述的像素补偿方法,其中,所述参考亮度值为理论亮度值与初始亮度值的差值,在调整所述每个子像素的亮度之后,所述方法还包括:
    在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
    确定调整亮度后所述每个子像素的实际亮度值;
    确定所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值;
    采用所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差 值,更新所述补偿感测模型中,所述每个子像素的参考亮度值。
  12. 一种像素补偿装置,应用于显示屏,所述显示屏包括多个子像素和与所述多个子像素一一对应的多个光敏单元,每个光敏单元用于对相应的子像素进行感测,所述装置包括:
    感测子电路,用于在所述显示屏的第一目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的实际亮度值;
    第一确定子电路,用于根据补偿感测模型,确定所述第一目标灰阶下,所述每个子像素的理论亮度值,所述补偿感测模型用于记录目标灰阶和理论像素数据的对应关系,所述理论像素数据包括每个子像素的参考亮度值,所述每个子像素的理论亮度值与所述每个子像素的参考亮度值一一对应;
    补偿子电路,用于根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,对所述每个子像素进行像素补偿。
  13. 根据权利要求12所述的像素补偿装置,其中,所述补偿子电路,用于:
    根据每个子像素的实际亮度值和所述每个子像素的理论亮度值,确定所述每个子像素的补偿误差;
    判断所述每个子像素的补偿误差是否处于预设误差范围内;
    若所述每个子像素的补偿误差未处于所述预设误差范围内,则调整所述每个子像素的亮度,以对所述每个子像素进行像素补偿。
  14. 根据权利要求13所述的像素补偿装置,其中,所述补偿子电路,用于:
    根据补偿误差公式确定所述补偿误差,所述补偿误差公式如下:
    ΔE=k×x'-x,
    其中,ΔE表示补偿误差,x'表示实际亮度值,x表示理论亮度值,k为补偿因子,k为大于0的常数。
  15. 根据权利要求12至14任一项所述的像素补偿装置,其中,所述补偿感测模型用于记录目标灰阶、理论像素数据和理论感测数据的一一对应关系,所述理论感测数据包括每个光敏单元的理论感测参数值,每个光敏单元的理论感测参数值为所述每个光敏单元对相应的子像素进行感测并得到对应的理论亮度值时的感测参数值,所述装置还包括:
    第二确定子电路,用于在显示屏的第一目标灰阶下,通过多个光敏单元对多个子像素进行感测,得到每个子像素的实际亮度值之前,从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据;
    调整子电路,用于根据所述第一目标灰阶对应的理论感测数据,调整每个光敏单元的感测参数值,使所述每个光敏单元的感测参数值为理论感测参数值;
    所述感测子电路,用于在所述第一目标灰阶下,通过所述多个光敏单元以相应的理论感测参数值对所述多个子像素进行感测,得到每个子像素的实际亮度值。
  16. 根据权利要求15所述的像素补偿装置,其中,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值,所述装置还包括:
    生成子电路,用于:
    在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
    将所述每个目标灰阶下所述多个子像素的理论亮度值,确定为所述每个目标灰阶对应的理论像素数据;
    确定所述每个目标灰阶对应的理论感测数据;
    根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
  17. 根据权利要求15所述的像素补偿装置,其中,所述显示屏具有m个目标灰阶,所述第一目标灰阶为所述m个目标灰阶中的任一灰阶,所述m为大于或等于1的整数,所述参考亮度值为理论亮度值与初始亮度值的差值,每个子像素的初始亮度值为所述显示屏显示黑画面时相应的光敏单元感测到的亮度值,所述装置还包括:
    生成子电路,用于:
    在从所述补偿感测模型中确定所述第一目标灰阶对应的理论感测数据之前,在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的理论亮度值;
    确定所述每个目标灰阶下所述每个子像素的理论亮度值与所述每个子像素 的初始亮度值的差值,得到所述每个目标灰阶下所述每个子像素的参考亮度值;
    将所述每个目标灰阶下所述多个子像素的参考亮度值确定为所述每个目标灰阶对应的理论像素数据;
    确定所述每个目标灰阶对应的理论感测数据;
    根据所述m个目标灰阶对应的理论像素数据和所述m个目标灰阶对应的理论感测数据,生成所述补偿感测模型。
  18. 根据权利要求16或17所述的像素补偿装置,其中,所述生成子电路,用于:
    在所述m个目标灰阶中的每个目标灰阶下,通过所述多个光敏单元对所述多个子像素进行感测,得到所述每个目标灰阶下每个子像素的亮度值;
    判断所述每个子像素的亮度值是否处于预设亮度值范围内;
    若所述每个子像素的亮度值处于预设亮度值范围内,则将所述每个子像素的亮度值确定为所述每个子像素在所述每个目标灰阶下的理论亮度值;
    若所述每个子像素的亮度值未处于所述预设亮度值范围内,则调整所述每个子像素对应的光敏单元的感测参数值,使每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值处于所述预设亮度值范围内,并将每个光敏单元以调整后的感测参数值对相应的子像素进行感测得到的亮度值确定为所述子像素在所述每个目标灰阶下的理论亮度值。
  19. 根据权利要求18所述的像素补偿装置,其中,所述光敏单元的感测参数值包括照光时间和积分电容值,所述生成子电路,用于:按照照光时间和积分电容值的优先级,调整所述每个子像素对应的光敏单元的所述照光时间和所述积分电容值中的至少一个,所述照光时间的优先级高于所述积分电容值的优先级。
  20. 根据权利要求18或19所述的像素补偿装置,还包括:
    校正子电路,用于:
    在判断所述每个子像素的亮度值是否处于预设亮度值范围内之前,且在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
    根据所述每个子像素的初始亮度值,确定所述每个子像素的亮度校正值;
    根据每个子像素的亮度校正值,对每个目标灰阶下所述每个子像素的亮度 值进行校正;
    所述生成子电路,用于:判断校正后的所述每个子像素的亮度值是否处于预设亮度值范围内。
  21. 根据权利要求13至16任一项所述的像素补偿装置,其中,所述参考亮度值为理论亮度值,所述装置还包括:
    第一更新子电路,用于:
    在调整所述每个子像素的亮度之后,确定调整亮度后所述每个子像素的实际亮度值;
    采用所述每个子像素的实际亮度值更新所述补偿感测模型中,所述每个子像素的参考亮度值。
  22. 根据权利要求13至15和权利要求17中任一项所述的像素补偿装置,其中,所述参考亮度值为理论亮度值与初始亮度值的差值,所述装置还包括:
    第二更新子电路,用于:
    在调整所述每个子像素的亮度之后,在所述显示屏显示黑画面时,通过所述多个光敏单元对所述多个子像素进行感测,得到每个子像素的初始亮度值;
    确定调整亮度后所述每个子像素的实际亮度值;
    确定所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值;
    采用所述每个子像素的实际亮度值与所述每个子像素的初始亮度值的差值,更新所述补偿感测模型中,所述每个子像素的参考亮度值。
  23. 一种存储介质,其中,所述存储介质中存储有指令,当所述指令在处理组件上运行时,使得所述处理组件执行如权利要求1至11任一所述的像素补偿方法。
  24. 一种像素补偿装置,包括:
    处理器;
    用于存储所述处理器的可执行指令的存储器;
    其中,所述处理器被配置为执行所述存储器中存储的指令以实现权利要求1至11任一所述的像素补偿方法。
  25. 一种显示屏,包括:多个子像素、与所述多个子像素一一对应的多个光敏单元,以及,权利要求12至22中任一项所述的或者权利要求24所述的像素补偿装置,每个光敏单元用于对相应子像素进行感测。
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