WO2020155975A1 - 显示面板及其发光控制电路、驱动方法、显示装置 - Google Patents

显示面板及其发光控制电路、驱动方法、显示装置 Download PDF

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Publication number
WO2020155975A1
WO2020155975A1 PCT/CN2019/128878 CN2019128878W WO2020155975A1 WO 2020155975 A1 WO2020155975 A1 WO 2020155975A1 CN 2019128878 W CN2019128878 W CN 2019128878W WO 2020155975 A1 WO2020155975 A1 WO 2020155975A1
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Prior art keywords
sub
pixel
circuit
light
emission control
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PCT/CN2019/128878
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English (en)
French (fr)
Inventor
刘利宾
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京东方科技集团股份有限公司
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Priority to US16/772,851 priority Critical patent/US11217147B2/en
Publication of WO2020155975A1 publication Critical patent/WO2020155975A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes

Definitions

  • the embodiments of the present disclosure relate to a display panel and its light emission control circuit, driving method, and display device.
  • the display panel includes a plurality of pixels arranged in an array, each pixel may include a plurality of sub-pixels of different colors, and each sub-pixel includes a pixel circuit and a light-emitting unit.
  • a light emission control circuit is usually provided on the display panel, and the light emission control circuit is connected to the light emission control end of the pixel circuit in each sub-pixel.
  • the light emitting control circuit can output a light emitting control signal to the light emitting control terminal of the pixel circuit, and the pixel circuit can output a driving current to the light emitting unit under the control of the light emitting control signal to drive the light emitting unit to emit light of predetermined brightness.
  • the larger the duty cycle of the light-emitting control signal the longer the time period for the pixel circuit to drive the light-emitting unit to emit light, and the higher the brightness of the light-emitting unit.
  • a display panel is generally provided with multiple light-emitting control circuits, each light-emitting control circuit is connected to the pixel circuit of each sub-pixel in a row of sub-pixels, and the multiple light-emitting control circuits can drive multiple rows of sub-pixels to emit light row by row. . Since the luminous efficiency of the light-emitting units in the sub-pixels of different colors is different, when displaying the same brightness, the light-emitting unit with lower luminous efficiency requires a larger driving current, and the light-emitting unit with higher luminous efficiency requires a higher driving current. small.
  • At least one embodiment of the present disclosure provides a light emission control circuit of a display panel, wherein the display panel includes a plurality of rows of sub-pixels, and each row of sub-pixels in the plurality of rows of sub-pixels includes at least a first color sub-pixel and A second color sub-pixel, each of the first color sub-pixel and the second color sub-pixel includes a pixel circuit and a light emitting unit;
  • the light emission control circuit includes a plurality of light emission control circuit groups, the plurality of light emission control circuit groups correspond to the multiple rows of sub-pixels one-to-one, and each of the plurality of light emission control circuit groups includes at least A first light emission control sub-circuit and a second light emission control sub-circuit; and
  • the first light-emitting control sub-circuit and the second light-emitting control sub-circuit are respectively connected to the pixel circuit of the first color sub-pixel and the pixel circuit of the second color sub-pixel in a row of sub-pixels, and respectively provide a first light-emitting control signal And a second light emitting control signal, the first light emitting control signal and the second light emitting control signal are respectively configured to drive the pixel circuit to output a driving current to the light emitting unit.
  • the duty ratios of the first lighting control signal and the second lighting control signal are different.
  • the first color subpixel is a blue subpixel
  • the second color subpixel is a green subpixel
  • the first lighting control signal and the second lighting control signal are pulse width modulation PWM signals; and the duty cycle of the first lighting control signal is greater than that of the second lighting control signal. The duty cycle of the signal.
  • the duty cycle of the first lighting control signal is two-thirds; and the duty cycle of the second lighting control signal is one-third.
  • each row of sub-pixels of the multiple rows of sub-pixels further includes a red sub-pixel, and the pixel circuit of the red sub-pixel is connected to the first light-emitting control sub-circuit or the second light-emitting control Sub-circuit connection.
  • each row of subpixels in the plurality of rows of subpixels further includes a red subpixel
  • each of the plurality of emission control circuit groups further includes a third emission control circuit group.
  • a control sub-circuit, and the red sub-pixel is connected to the third light-emitting control sub-circuit.
  • At least one embodiment of the present disclosure provides a display panel including: a plurality of sub-pixels arranged in an array and the aforementioned light-emitting control circuit; the light-emitting control circuit is respectively connected to the pixel circuit of each sub-pixel in each row of sub-pixels.
  • the display panel further includes a source drive circuit; the source drive circuit is respectively connected to the pixel circuit of each sub-pixel in each column of sub-pixels, and is configured to provide The circuit provides a data signal, and the pixel circuit is used to adjust the size of the driving current output to the light-emitting unit according to the data signal.
  • At least one embodiment of the present disclosure provides a method for driving a display panel, which is suitable for the above-mentioned display panel, and the method includes:
  • a light emission control signal is output to a pixel circuit in at least one color sub-pixel connected to the light emission control sub circuit.
  • the data signal is configured to control the size of the driving current output by the pixel circuit; and the light emission control signal is configured to control the light emission duration of the light emitting unit in the sub-pixel.
  • the duty cycle of the emission control signal output by any two of the emission control sub-circuits in each emission control circuit group in the plurality of emission control circuit groups is different, and the emission The duty cycle of the control signal is negatively related to the luminous efficiency of the light-emitting unit.
  • the voltage of the compensated data signal output by the source driver circuit to the pixel circuit of the first color sub-pixel is less than the voltage of the data signal before compensation, and the voltage of the data signal before the compensation is lower than the voltage of the data signal before the compensation.
  • the voltage of the compensated data signal output by the circuit is greater than the voltage of the data signal before compensation.
  • the duty cycle of the first emission control signal output by the first emission control sub-circuit to the pixel circuit of the first color sub-pixel is greater than a first threshold
  • the second emission control The duty cycle of the second light-emitting control signal output by the sub-circuit to the pixel circuit of the second color sub-pixel is less than a second threshold
  • the first threshold is greater than or equal to the second threshold
  • At least one embodiment of the present disclosure also provides a display device including the above-mentioned display panel.
  • FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure
  • Fig. 2 is a schematic structural diagram of a sub-pixel according to an embodiment of the present disclosure
  • Fig. 3 is a schematic structural diagram of a light emitting control circuit according to an embodiment of the present disclosure
  • Fig. 4 is a schematic structural diagram of a light emitting control circuit according to another embodiment of the present disclosure.
  • FIG. 5 is a timing diagram of light emission control signals output by a light emission control sub-circuit according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a light emitting control circuit according to another embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a light emission control circuit according to still another embodiment of the present disclosure.
  • FIG. 8 is a timing diagram of light-emitting control signals output by the light-emitting control sub-circuit shown in FIG. 7;
  • FIG. 9 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
  • FIG. 10 is a flowchart of a driving method of a display panel according to an embodiment of the present disclosure.
  • At least one embodiment of the present disclosure provides a light emission control circuit of a display panel, wherein the display panel includes a plurality of rows of sub-pixels, and each row of sub-pixels in the plurality of rows of sub-pixels includes at least a first color sub-pixel and The second color sub-pixel, the first color sub-pixel and the second color sub-pixel each include a pixel circuit and a light-emitting unit; the light-emitting control circuit includes a plurality of light-emitting control circuit groups, and the plurality of light-emitting control circuit groups In one-to-one correspondence with the multiple rows of sub-pixels, each of the multiple light-emitting control circuit groups includes at least a first light-emitting control sub-circuit and a second light-emitting control sub-circuit; the first light-emitting control sub-circuit The circuit and the second light-emitting control sub-circuit are respectively connected to the pixel circuit of the first color sub-pixel and the pixel circuit of the second color sub
  • Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
  • the display panel may include a plurality of sub-pixels 01, a light emission control circuit 02, a source driving circuit 03 and a gate driving circuit 04 arranged in an array.
  • the plurality of sub-pixels 01 are located in the display area of the display panel, and the light emission control circuit 02, the source drive circuit 03, and the gate drive circuit 04 are all located in the peripheral area around the display area.
  • the light emission control circuit 02 can also be referred to as an emission (EM) circuit.
  • the source driving circuit 03 may be an integrated circuit (IC).
  • the gate driving circuit 04 may be a gate driver on array (GOA) circuit.
  • the side surface of the display panel can also be provided with a chip on film (COF).
  • COF is a type of light emitting control circuit 02, source drive circuit 03, and gate drive circuit 04 fixed on a flexible circuit board.
  • the die soft film packaging technology is a technology that uses a soft additional circuit board as a carrier for the packaged chip to join the chip and the flexible substrate circuit.
  • FIG. 2 is a schematic structural diagram of a sub-pixel according to an embodiment of the present disclosure.
  • each sub-pixel 01 may include a pixel circuit 011 and a light-emitting unit 012, and the light-emitting unit 012 may be an organic light-emitting diode. OLED).
  • the light emission control circuit 02 can be connected to the light emission control terminal EM of the pixel circuit of each sub pixel in each row of sub pixels, and is configured to provide the light emission control signal to the light emission control terminal EM.
  • the gate driving circuit 04 may be connected to the gate signal terminal G of the pixel circuit of each sub-pixel in each row of sub-pixels, and is configured to provide a gate driving signal to the gate signal terminal G.
  • the source driving circuit 03 may be connected to the data signal terminal D of the pixel circuit of each sub-pixel in each column of sub-pixels, and is configured to provide the data signal terminal D with a data signal.
  • the pixel circuit of each sub-pixel may also be connected to the power signal terminal VDD.
  • Each pixel circuit 011 can store the data voltage of the data signal under the driving of the gate driving signal.
  • each pixel circuit 011 can output a driving current to the light-emitting unit 012 under the power supply of the power signal terminal VDD when the received light-emitting control signal is at an effective level.
  • the magnitude of the driving current is equal to the magnitude of the stored data voltage. Positive correlation.
  • the multiple sub-pixels 01 in the display panel generally include: red sub-pixels, green sub-pixels, and blue sub-pixels.
  • the luminous efficiency of the light-emitting unit in the blue sub-pixel is low, and the luminous efficiency of the light-emitting unit in the green sub-pixel is Higher, the luminous efficiency of the light-emitting unit in the red sub-pixel is greater than the light-emitting efficiency of the light-emitting unit in the blue sub-pixel, but less than the luminous efficiency of the light-emitting unit in the green sub-pixel.
  • the driving current I B output by the pixel circuit to the light-emitting unit in the blue sub-pixel is relatively large, and the pixel circuit in the green sub-pixel output to the light-emitting unit.
  • the driving current I G is small.
  • the driving current I R output by the pixel circuit in the red sub-pixel to the light-emitting unit is greater than the driving current I B output by the pixel circuit in the blue sub-pixel to the light-emitting unit, and less than the pixel circuit in the green sub-pixel.
  • the drive current I G output by the unit is I G ⁇ I R ⁇ I B.
  • the driving method in the related art will cause the life span of the blue sub-pixel to decrease.
  • the luminous efficiency of the light-emitting unit in the green sub-pixel is relatively high, when the same brightness is displayed, the required driving current is relatively small. Therefore, when displaying a lower brightness, the required driving current will be further reduced, so that the voltage of the data signal that the source driver circuit needs to output to the pixel circuit of the green sub-pixel is also small, which may exceed the source.
  • the adjustment range of the voltage of the data signal output by the driving circuit makes it impossible to provide the required voltage for the pixel circuit.
  • the driving current output by the pixel circuit in the green sub-pixel to the light-emitting unit is small, the threshold voltage drift of the driving transistor in the pixel circuit has a greater impact on the driving current, resulting in a large deviation in the brightness of the light-emitting unit. Affect the brightness uniformity of the display panel. Since the human eye is most sensitive to the light emitted by the green sub-pixel, when the brightness of the light-emitting unit in the green sub-pixel varies, the brightness uniformity of the display panel observed by the human eye is worse (mura).
  • FIG. 3 is a schematic structural diagram of a light-emitting control circuit provided by an embodiment of the present disclosure, which can solve the problems of a shorter life of a light-emitting unit with lower luminous efficiency and a larger brightness deviation of a light-emitting unit with higher luminous efficiency in the related art.
  • the light emission control circuit can be applied to the display panel shown in FIG. 1.
  • the display panel may include multiple rows of sub-pixels, and each row of sub-pixels may include multiple sub-pixels of different colors.
  • different filling patterns are used to represent sub-pixels of different colors.
  • each row of sub-pixels may include a first color sub-pixel 01a and a second color sub-pixel 01b.
  • each sub-pixel may include a pixel circuit 011 and a light emitting unit 012.
  • the light emission control circuit 02 may include: a plurality of light emission control circuit groups 021, each of the light emission control circuit groups 021 corresponds to a row of sub-pixels, and each light emission control circuit group 021 It may include at least two light emission control sub-circuits. Each light-emission control sub-circuit can be connected to the light-emission control signal terminal of the pixel circuit in the sub-pixel of at least one color in a row of sub-pixels and provide a light-emission control signal configured to drive the pixel circuit to output to the light-emitting unit Drive current.
  • At least two light-emitting control sub-circuits in each light-emitting control circuit group 02 can be connected to the same row of sub-pixels, and the colors of the sub-pixels connected to any two light-emitting control sub-circuits are different.
  • each emission control circuit group 021 may include two emission control sub-circuits 0211 and 0212.
  • each row of sub-pixels includes two-color sub-pixels: first color sub-pixels 01a and the second color sub-pixel 01b
  • the light-emission control sub-circuit 0211 in the light-emission control circuit group 021 can be connected to the first color sub-pixel 01a
  • the light-emission control sub-circuit 0212 in the light-emission control circuit group 021 can be connected to the first color sub-pixel 01a.
  • the two-color sub-pixel 01b is connected.
  • each row of sub-pixels includes three-color sub-pixels, that is, in addition to the first color sub-pixel 01a and the second color sub-pixel 01b shown in FIG.
  • the third color sub-pixel 01c, the light-emission control sub-circuit 0211 in the light-emission control circuit group 021 may be connected to the first color sub-pixel 01a and the third color sub-pixel 01c in a row of sub-pixels, the light-emission control circuit group 021
  • the light emission control sub-circuit 0212 in can be connected to the second color sub-pixel 01b in a row of sub-pixels.
  • At least two light-emission control sub-circuits in the light-emission control circuit group 021 emit light-emission control signals with different duty cycles.
  • the emission control sub-circuit 0211 and the emission control sub-circuit 0212 are respectively connected to sub-pixels of different colors.
  • the emission control sub-circuit 0211 is connected to the first color sub-pixel 01a
  • the emission control sub-circuit 0212 is connected to the second color sub-pixel 01b.
  • the light-emission control sub-circuit 0211 outputs to the first color sub-pixel 01a with a large
  • the light emission control signal of the duty cycle increases the light emission duration of the first color sub-pixel 01a.
  • the light-emission control sub-circuit 0212 outputs a signal with a small duty cycle to the second color sub-pixel 01b
  • the light emission control signal reduces the light emission duration of the second color sub-pixel 01b. Compared with not reducing the light-emitting duration of the second color sub-pixel 01b, in order to achieve the same light-emitting brightness, it is necessary to increase the driving current provided to the second color sub-pixel 01b.
  • the driving current output to the light-emitting unit of the second color sub-pixel 01b can be increased to reduce the pixel
  • the influence of the threshold voltage drift of the driving transistor in the circuit on the driving current ensures the brightness uniformity of the display panel and improves the image quality of the display panel.
  • the light emission control circuit provided by the embodiment of the present disclosure includes a plurality of light emission control circuit groups 021, the plurality of light emission control circuit groups 021 correspond to a row of sub-pixels, and each light emission control circuit group 021 may include at least two light emission control sub-circuits At least two light-emitting control sub-circuits included in each light-emitting control circuit group 02 can be connected to the same row of sub-pixels, and the colors of the sub-pixels connected to any two light-emitting control sub-circuits are different.
  • the duty cycle of the light-emitting control signal output by the light-emitting control sub-circuit to the pixel circuits in different color sub-pixels can be adjusted, that is, the light-emitting unit in each sub-pixel can be adjusted for one frame.
  • the duration of light emission during image display Further, the voltage of the data signal output by the source driving circuit to the pixel circuit in each sub-pixel can be adjusted according to the duty ratio of the light-emitting control signal, that is, the driving current output by the pixel circuit in each sub-pixel to the light-emitting unit can be adjusted. the size of.
  • the light-emission control sub-circuit can output light with a relatively large duty cycle to the sub-pixel of this color.
  • the control signal is to increase the light-emitting duration of the light-emitting unit in the sub-pixel of the color during the display of one frame of image, and then the source drive circuit can be adjusted according to the duty cycle to output to the pixel circuit in the sub-pixel of the color
  • the voltage of the data signal in the sub-pixel of the color reduces the driving current output by the pixel circuit to the light-emitting unit in the sub-pixel of the color, thereby increasing the life of the sub-pixel of the color.
  • the light-emission control sub-circuit can be made to output a light-emission control signal with a small duty ratio to the sub-pixel of this color, that is, to reduce the The light-emitting time length of the light-emitting unit in the color sub-pixel during the display of one frame of image, and then the voltage of the data signal output by the source driver circuit to the pixel circuit in the color sub-pixel can be increased according to the duty ratio to ensure The voltage does not exceed the adjustment range of the voltage of the data signal output by the source driving circuit.
  • the driving current output from the pixel circuit in the sub-pixel of the color to the light-emitting unit also increases, and the pixel circuit
  • the threshold voltage drift of the driving transistor has less influence on the driving current, and the brightness deviation of the light-emitting unit is small, which ensures the brightness uniformity of the display panel and improves the image quality of the display panel.
  • the embodiments of the present disclosure provide a lighting control circuit.
  • the lighting control circuit includes a plurality of lighting control circuit groups, and each lighting control circuit group includes at least two lighting control sub-circuits.
  • the duty cycle of the light-emitting control signal sent by the control sub-circuit is different.
  • the at least two light-emitting control circuits may be connected to the sub-pixels in the same row, and the colors of the sub-pixels connected to any two light-emitting control sub-circuits are different.
  • the light-emission control sub-circuits to provide different color sub-pixels with different duty cycle light-emission control signals, adjust the light-emitting duration of the light-emitting unit in the different color sub-pixels during one frame of image display, so as to achieve the same display
  • the voltage of the data signal output by the source driving circuit to the sub-pixels of different colors is adjusted to provide a smaller driving current for the light-emitting unit with low luminous efficiency of the sub-pixel, and extend its life.
  • the light-emitting unit with high luminous efficiency provides a larger driving current, which reduces the influence of threshold voltage drift on the brightness of the light-emitting unit with higher luminous efficiency when displaying low brightness.
  • the first color sub-pixel 01a may be a blue sub-pixel
  • the second color sub-pixel may be a green sub-pixel 01b.
  • the first emission control sub-circuit 0211 can be connected to the emission control signal terminal of the pixel circuit of the blue sub-pixel 01a in a row of sub-pixels
  • the second emission control The sub-circuit 0212 may be connected to the light-emitting control signal terminal of the pixel circuit of the green sub-pixel 01b in a row of sub-pixels.
  • the light emission control signal output by each light emission control sub-circuit may be a pulse width modulation (PWM) signal
  • the duty cycle of the light emission control signal output by the first light emission control sub-circuit 0211 may be greater than The duty cycle of the light emission control signal output by the second light emission control sub-circuit 0212.
  • the duty cycle refers to the ratio of the duration of the effective level to the period of the light emission control signal in one cycle of the light emission control signal.
  • the high level is taken as an effective level as an example for description
  • the duty cycle refers to the ratio of the duration of the high level to the period of the light emitting control signal.
  • the effective level in the light-emission control signal sent by the light-emission control sub-circuit, can also be a low level.
  • the duty cycle refers to the duration of the low level and the period of the light-emission control signal. The ratio of the duration.
  • the light-emitting duration of the light-emitting unit during the display of one frame of image is positively correlated with the duty cycle of the light-emitting control signal, that is, the greater the duty cycle of the light-emitting control signal, the longer the light-emitting duration of the light-emitting unit during the display of one frame of image Longer, the smaller the duty cycle of the light-emitting control signal, the shorter the light-emitting duration of the light-emitting unit during the display of one frame of image.
  • FIG. 5 is a timing diagram of light emission control signals output by a light emission control sub-circuit provided by an embodiment of the present disclosure.
  • the emission control signal output by the first emission control sub-circuit 0211 is EM1
  • the emission control signal output by the second emission control sub-circuit 0212 is EM2.
  • the low level is the effective level, that is, when the light-emitting control signal received by the pixel circuit is low, the pixel circuit can drive the light-emitting unit to emit light.
  • the frequency of the first control signal EM1 and the second control signal EM2 may be the same, and the duty cycle of the first control signal EM1 may be greater than the duty cycle of the second control signal EM2, that is, and
  • the light-emitting duration of the light-emitting unit in the sub-pixel connected to the first light-emitting control sub-circuit 0211 during the display of one frame of image may be greater than that of the light-emitting unit in the sub-pixel connected to the second light-emitting control sub-circuit 0212 to display one frame of image The lighting duration during the process.
  • the driving current output by the pixel circuit to the light-emitting unit can be compared with the light-emitting unit in the process of displaying a frame of image. Time length is negatively correlated.
  • the longer the light-emitting time of the light-emitting unit during the display of one frame of image the smaller the driving current output by the pixel circuit to the light-emitting unit; the light-emitting unit is in the process of displaying one frame of image
  • the shorter the light-emitting time the greater the driving current output from the pixel circuit to the light-emitting unit.
  • the first light-emitting control sub-circuit 0211 can output a light-emitting control signal with a larger duty cycle for the blue sub-pixel 01a, thereby increasing the blue sub-pixel 01a The luminous duration during the display of a frame of image.
  • the driving current output to the light-emitting unit of the blue sub-pixel 01a can be reduced, while ensuring the The brightness is the target brightness, so that the life span of the blue sub-pixel 01a can be increased.
  • the second light-emitting control sub-circuit 0212 can output a light-emitting control signal with a small duty ratio for the green sub-pixel 01b, thereby reducing The light-emitting duration during the display of the frame image.
  • the driving current output to the light-emitting unit of the green sub-pixel 01b can be increased while ensuring the brightness of the green sub-pixel 01b as the target Brightness, thereby reducing the influence of the threshold voltage drift of the driving transistor in the pixel circuit of the green sub-pixel 01b on the driving current, and reducing the brightness deviation of the light-emitting unit in the green sub-pixel 01b.
  • the voltage of the data signal output by the source drive circuit to the pixel circuit in the green sub-pixel 01b can also be appropriately increased to ensure the In the case that the voltage does not exceed the adjustment range of the voltage of the data signal output by the source drive circuit, the requirement for the adjustment accuracy of the data signal output by the source drive circuit is reduced.
  • the light-emitting control circuit can balance the relationship between the life of the blue sub-pixel and the brightness deviation of the light-emitting unit in the green sub-pixel, that is, not only can the life of the blue sub-pixel be increased, but also The brightness deviation of the light-emitting unit of the green sub-pixel can be reduced.
  • the duration of each cycle of the light-emitting control signal may be a quarter of the total duration of the image display process of one frame. That is, during the display of one frame of image, the light-emitting control signal can be repeated for four cycles.
  • each row of sub-pixels may further include a red sub-pixel 01c, and the light-emitting control signal terminal of the pixel circuit of the red sub-pixel 01c in a row of sub-pixels may be connected to the first light-emitting control sub-circuit 0211. That is, the red sub-pixel 01c and the blue sub-pixel 01a can be connected to the same light-emission control sub-circuit, that is, the first light-emission control sub-circuit 0211, and the green sub-pixel 01b and the second light-emission control sub-circuit 0212 are connected.
  • the duty ratios of the light emission control signals received by the red sub-pixel 01c and the blue sub-pixel 01a in each row of sub-pixels are the same, that is, the light-emitting units in the red sub-pixel 01c and the blue sub-pixel 01a are one frame
  • the duration of light emission during the display of the image is the same.
  • the light-emission control signal terminal of the pixel circuit of the red sub-pixel 01c in a row of sub-pixels may be connected to the second light-emission control sub-circuit 0212. That is, the red sub-pixel 01c and the green sub-pixel 01b can be connected to the same light-emission control sub-circuit, that is, the second light-emission control sub-circuit 0212, and the blue sub-pixel 01a is connected to the first light-emission control sub-circuit 0211.
  • the duty ratios of the light emission control signals received by the red sub-pixel 01c and the green sub-pixel 01b in each row of sub-pixels are the same, that is, the red sub-pixel 01c and the green sub-pixel 01b are in the process of displaying one frame of image
  • the lighting time is the same.
  • each light emission control circuit group 02 may further include a third light emission control sub-circuit 0213, and each row of sub-pixels may further include a red sub-pixel 01c.
  • the third light-emitting control sub-circuit 0213 may be connected to the light-emitting control signal terminal of the pixel circuit of the red sub-pixel 01c in a row of sub-pixels. That is, the red sub-pixel 01c, the green sub-pixel 01b, and the blue sub-pixel 01a can be connected to different light-emitting control sub-circuits, so that the red sub-pixel 01c, the green sub-pixel 01b, and the blue sub-pixel 01a receive The duty cycle of the lighting control signal is different.
  • FIG. 8 respectively shows the first emission control signal EM1 issued by the first emission control sub-circuit 0211, the second emission control signal EM2 issued by the second emission control sub-circuit 0212, and the third emission control sub-circuit 0213.
  • Waveform diagram of the third light emission control signal EM3 Since the luminous efficiency of the red sub-pixel 01c is greater than the luminous efficiency of the blue sub-pixel 01a and less than the luminous efficiency of the green sub-pixel 01b, the third emission control sub-circuit 0213 is the third emission control signal EM3 output by the red sub-pixel 01c.
  • the duty cycle is smaller than the duty cycle of the first emission control signal EM1 output by the first emission control sub-circuit 0211 for the blue sub-pixel 01a, and greater than the duty cycle of the second emission control signal EM1 output by the second emission control sub-circuit 0212 for the green sub-pixel 01b
  • the duty cycle of the emission control signal EM2. Therefore, the light-emitting time length of the light-emitting unit in the red sub-pixel 01c during the display of one frame of image is less than the light-emitting time length of the light-emitting unit in the blue sub-pixel 01a during the display of one frame of image, but is greater than that of the green sub-pixel 01b The light-emitting time of the light-emitting unit in one frame of image display.
  • the duty ratio of the first emission control signal EM1 output by the first emission control sub-circuit 0211 may be two-thirds.
  • the duty cycle of the second emission control signal EM2 output by the second emission control sub-circuit 0212 may be one third.
  • the duty cycle of the third emission control signal EM3 output by the third emission control sub-circuit 0213 may be one half.
  • each light-emitting control circuit group may be arranged on the same side of the display panel, or may be separately Set on both sides of the display panel.
  • the first light emission control sub-circuit 0211 and the second light emission control sub-circuit 0212 included in the light emission control circuit group 021 are both arranged on the left side of the display panel.
  • the first light-emitting control sub-circuit 0211 and the second light-emitting control sub-circuit 0212 included in the light-emitting control circuit group 021 are respectively arranged on the left and right sides of the display panel.
  • the first emission control sub-circuit 0211 included in the emission control circuit group 021 is arranged on the left side of the display panel, and the second emission control sub-circuit 0212 and the third emission control sub-circuit are both arranged on the display panel. To the right.
  • the embodiments of the present disclosure provide a lighting control circuit.
  • the lighting control circuit includes a plurality of lighting control circuit groups, and each lighting control circuit group includes at least two lighting control sub-circuits.
  • the at least two light-emitting control circuits may be connected to the sub-pixels in the same row, and the colors of the sub-pixels connected to any two light-emitting control sub-circuits are different. Therefore, different light emission control sub-circuits can provide different color sub-pixels with light-emission control signals with different duty ratios, so as to realize the adjustment of the light-emitting duration of the light-emitting units in the different color sub-pixels during one frame of image display.
  • the voltage of the data signal provided by the source driving circuit to the sub-pixels of different colors can be appropriately adjusted under the premise of the same brightness, which improves the life of the light-emitting unit with lower luminous efficiency and reduces the threshold voltage drift.
  • FIG. 9 is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure.
  • the display panel may include a plurality of sub-pixels 01 arranged in an array and the light emission control circuit shown in any one of FIGS. 3, 4, 6 and 7.
  • the light emission control circuit may be respectively connected to the light emission control signal terminal of the pixel circuit of each sub pixel 01 in each row of sub pixels.
  • the light emission control circuit can be used to drive multiple rows of sub-pixels in the display panel to emit light row by row.
  • the light emission control circuit may include N groups of light emission control circuit groups.
  • the display panel may further include a source driving circuit 03.
  • the source driving circuit 03 can be respectively connected to the data signal end of the pixel circuit of each sub-pixel 01 in each column of sub-pixels, and is used to provide a data signal for the pixel circuit of each column of sub-pixels, and the pixel circuit is configured according to the data signal. Adjust the size of the drive current output to the light-emitting unit.
  • the embodiments of the present disclosure provide a display panel, which may include a plurality of sub-pixels arranged in an array and a light emission control circuit.
  • the light emission control circuit can be respectively connected to the light emission control signal terminal of the pixel circuit of each sub pixel in each row of sub pixels.
  • the light-emitting control circuit can provide light-emission control signals with different duty cycles for sub-pixels of different colors, and adjust the light-emitting duration of the light-emitting units in the sub-pixels of different colors during one frame of image display, so that the brightness is unchanged.
  • FIG. 10 is a flowchart of a method for driving a display panel provided by an embodiment of the present disclosure. The method may be applied to the display panel shown in FIG. 1 or FIG. 9. As can be seen with reference to Figure 10, the method may include:
  • a light emission control signal is output to a pixel circuit in at least one color sub-pixel connected to the light emission control sub circuit.
  • the compensated data signal may be configured to control the magnitude of the driving current output by the pixel circuit in the first color sub-pixel and the second color sub-pixel in each column of sub-pixels, and the driving current The magnitude of is positively correlated with the magnitude of the voltage of the compensated data signal.
  • the voltage of the compensated data signal output by the source driving circuit to the pixel circuit in the first color sub-pixel is less than the voltage of the data signal before compensation, and it outputs to the pixel circuit in the second color sub-pixel
  • the voltage of the compensated data signal is greater than the voltage of the data signal before compensation.
  • the first-color sub-pixel may be a sub-pixel with low light-emitting efficiency of the light-emitting unit
  • the second-color sub-pixel may be a sub-pixel with high light-emitting efficiency of the light-emitting unit.
  • the first color sub-pixel may be a blue sub-pixel
  • the second color sub-pixel may be a green sub-pixel
  • the source driver circuit outputs the data signal before compensation to the pixel circuit in the blue sub-pixel.
  • the voltage is 10V (V), and the voltage of the compensated data signal can be 8V.
  • the voltage of the data signal before compensation output by the source driving circuit to the pixel circuit in the green sub-pixel is 9V, and the voltage of the data signal after compensation may be 11V. That is, the driving current of the light-emitting unit of the blue sub-pixel is smaller than the driving current before compensation.
  • the driving current of the light-emitting unit of the green sub-pixel is greater than the driving current before compensation.
  • the source driving circuit is The voltage of the compensated data signal output by the pixel circuit in the sub-pixel may also be lower than the voltage of the data signal before compensation.
  • the source driving circuit transfers the sub-pixels of the color
  • the voltage of the compensated data signal output by the pixel circuit may also be greater than the voltage of the data signal before compensation.
  • the display panel further includes sub-pixels of the third color, and the sub-pixels of the third color are connected to the light-emitting control sub-circuit, the light-emitting control sub-circuits connected to the first color sub-pixel and the second color sub-pixel are connected
  • the light-emitting control sub-circuits are all different, so the source driver circuit may not need to compensate the data signal of the pixel circuit in the sub-pixel of the color.
  • the source driving circuit can also compensate the data signal of the pixel circuit in the color sub-pixel according to the duty ratio of the light-emitting control signal output by the light-emitting control sub-circuit to the sub-pixel of the color.
  • the pixel circuit when the received light-emitting control signal is at an effective level, the pixel circuit can drive the light-emitting unit to emit light. Therefore, the light-emitting control signal can be used to control the light-emitting unit in the sub-pixel during a frame of image display.
  • the luminous duration when the received light-emitting control signal is at an effective level, the pixel circuit can drive the light-emitting unit to emit light. Therefore, the light-emitting control signal can be used to control the light-emitting unit in the sub-pixel during a frame of image display. The luminous duration.
  • the light emitting control circuit in the display panel may include multiple light emitting control circuit groups.
  • the duty cycle of the light emission control signal output by any two light emission control sub-circuits is different, and the duty cycle of the light emission control signal is the same as that of the light emitting unit of the sub pixel connected to the light emission control sub circuit. Efficiency is negatively correlated.
  • the lower the light-emitting efficiency of the light-emitting unit the larger the duty cycle of the light-emitting control signal emitted by the light-emitting control sub-circuit connected to the sub-pixel containing the light-emitting unit, the higher the light-emitting efficiency of the light-emitting unit, and the The smaller the duty cycle of the light-emission control signal issued by the light-emission control sub-circuit connected to the sub-pixel of the light-emitting unit.
  • the duty cycle of the light-emitting control signal output by the light-emitting control sub-circuit to the pixel circuit in the first color sub-pixel is greater than the first threshold.
  • the duty ratio of the luminescence control signal output by the luminescence control sub-circuit to the pixel circuit in the second color sub-pixel is smaller than the second threshold.
  • the first threshold is greater than or equal to the second threshold.
  • the duty cycle of the emission control signal output by the emission control sub-circuit to the pixel circuit in the first color sub-pixel may be two-thirds.
  • the duty cycle of the emission control signal output by the emission control sub-circuit to the pixel circuit in the second color sub-pixel may be one third.
  • the first color subpixel may be a blue subpixel
  • the second color subpixel may be a green subpixel. It is assumed that the blue sub-pixel and the red sub-pixel are connected to the first light-emitting sub-circuit, and the green sub-pixel is connected to the second light-emitting control sub-circuit. Therefore, the duty ratio of the light emission control signal output through the first light emission control sub-circuit can be larger, and the duty ratio of the light emission control signal output through the second light emission sub-circuit can be smaller.
  • the duty ratio of the light emission control signal output by the first light emission control sub-circuit connected to the blue sub-pixel is greater than the duty ratio of the light emission control signal output by the second light emission control sub-circuit connected to the green sub-pixel. Therefore, the light-emitting duration of the light-emitting unit in the blue sub-pixel during the display of one frame of image is longer than the light-emitting duration of the light-emitting unit in the green sub-pixel during the display of one frame of image.
  • the light-emitting unit in the blue sub-pixel may have a light-emitting period of 24 milliseconds during a frame of image display
  • the light-emitting unit in the green sub-pixel may have a light-emitting period of 12 milliseconds during a frame of image display.
  • the source driver circuit is used to transfer the pixel circuit of the first color sub-pixel and the second color sub-pixel in each column of sub-pixels.
  • the voltage of the compensated data signal output by the source driver circuit to the pixel circuit in the blue sub-pixel may be less than the voltage of the data signal before compensation, so that the blue sub-pixel
  • the driving current output by the pixel circuit in the pixel to the light-emitting unit is reduced, thereby increasing the life span of the blue sub-pixel.
  • the source driving circuit is used to transfer the pixel circuit of the first color sub-pixel and the second color sub-pixel in each column of sub-pixels.
  • the voltage of the compensated data signal output by the source driver circuit to the pixel circuit in the green sub-pixel may be greater than the voltage of the data signal before compensation.
  • the voltage adjustment range of the data signal output by the source driver circuit to the pixel circuit in the green sub-pixel can be increased, and the voltage output by the source driver circuit to the pixel circuit in the green sub-pixel can be prevented from exceeding the data signal.
  • the voltage adjustment range ensures that the pixel circuit can provide the required voltage.
  • increasing the voltage of the data signal output by the source driving circuit to the pixel circuit in the green sub-pixel will increase the driving current output by the pixel circuit in the green sub-pixel to the light-emitting unit. Big. Therefore, the threshold voltage drift of the driving transistor in the pixel circuit of the green sub-pixel has less influence on the driving current, and the brightness deviation of the light-emitting unit in the green sub-pixel can be reduced.
  • each light-emission control sub-circuit in each light-emission control circuit group to the pixel of at least one color sub-pixel connected to the light-emission control sub-circuit.
  • the circuit outputs a light emission control signal, and outputs a compensated data signal to the pixel circuit of the first color sub-pixel and the pixel circuit of the second color sub-pixel in each column of sub-pixels through the source drive circuit.
  • the embodiments of the present disclosure provide a method for driving a display panel.
  • the source drive circuit can output the compensated data signal to the pixel circuit of the first color sub-pixel and the pixel circuit of the second color sub-pixel in each column of sub-pixels.
  • the light-emitting control signal is output to the pixel circuit in the at least one color sub-pixel connected to the light-emitting control sub-circuit.
  • different color sub-pixels are provided with different duty cycle light-emitting control signals through different light-emitting control sub-circuits, and the light-emitting duration of the light-emitting units in different color sub-pixels during one frame of image display can be adjusted, so that the brightness can be adjusted.
  • adjust the voltage of the data signal output by the source driving circuit for the sub-pixels of different colors improve the life of the light-emitting unit with lower luminous efficiency, and reduce the higher luminous efficiency caused by the threshold voltage drift The brightness deviation of the light-emitting unit.
  • the driving current of the light-emitting unit with higher luminous efficiency is increased, the voltage of the data signal output by the source driving circuit for the pixel circuit connected to the light-emitting unit is increased, thereby ensuring the voltage required by the pixel circuit Will not exceed the adjustment range of the voltage of the data signal.
  • the embodiment of the present disclosure also provides a display device, which may include: the display panel shown in FIG. 1 or FIG. 9.
  • the display device can be: LCD panel, electronic paper, OLED panel, AMOLED panel, mobile phone, tablet computer, TV, monitor, notebook computer, digital photo frame, navigator and other products or components with display function.
  • the embodiment of the present disclosure also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on a computer, the computer executes the display panel provided by the above method embodiment Drive method.
  • the program can be stored in a computer-readable storage medium.
  • the storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

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Abstract

一种显示面板的发光控制电路，显示装置和驱动方法。其中，显示面板包括多行子像素(01)，每行子像素(01)包括至少第一颜色子像素（01a）和第二颜色子像素（01b），第一颜色子像素（01a）和第二颜色子像素（01b）均包括像素电路(011)和发光单元(012)；发光控制电路(02)包括与多行子像素(01)一一对应的多个发光控制电路组(021)，每个发光控制电路组(021)至少包括第一发光控制子电路（0211）和第二发光控制子电路（0212）；第一发光控制子电路（0211）和第二发光控制子电路（0212）分别与一行子像素（01）中的第一颜色子像素（01a）的像素电路和第二颜色子像素（01b）的像素电路连接并分别提供第一发光控制信号（EM1）和第二发光控制信号(EM2)，第一发光控制信号(EM1)和第二发光控制信号(EM2)分别配置为驱动像素电路向发光单元输出驱动电流。

Description

显示面板及其发光控制电路、驱动方法、显示装置
本公开要求于2019年1月30日提交的申请号为201910091078.1、公开名称为“显示面板及其发光控制电路、驱动方法、显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开的实施例涉及一种显示面板及其发光控制电路、驱动方法、显示装置。
背景技术
显示面板包括阵列排布的多个像素，每个像素可以包括多个不同颜色的子像素，每个子像素包括像素电路以及发光单元。显示面板上通常还设置有发光控制电路，该发光控制电路与每个子像素中的像素电路的发光控制端连接。该发光控制电路可以向像素电路的发光控制端输出发光控制信号，像素电路可以在该发光控制信号的控制下向发光单元输出驱动电流，以驱动发光单元发出预定亮度的光。其中，该发光控制信号的占空比越大，像素电路驱动发光单元发光的时长越长，发光单元的亮度越高。
相关技术中，显示面板中一般设置有多个发光控制电路，每个发光控制电路与一行子像素中的每个子像素的像素电路连接，该多个发光控制电路可以驱动多行子像素逐行发光。由于不同颜色的子像素中的发光单元的发光效率不同，在显示同样的亮度时，发光效率较低的发光单元所需的驱动电流较大，发光效率较高的发光单元所需的驱动电流较小。
但是，对于发光效率较低的发光单元，由于其所需的驱动电流较大，因此其寿命相对于其他发光单元会较短。而对于发光效率较高的发光单元，在显示较低的亮度时，由于其所需的驱动电流较小，因此，该发光单元所连接的像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响较大，导致该发光单元的亮度偏差较大。
发明内容
本公开的至少一个实施例提供了一种显示面板的发光控制电路，其中，所述显示面板包括多行子像素，所述多行子像素中的每行子像素包括至少第一颜色子像素和第二颜色子像素，所述第一颜色子像素和所述第二颜色子像素均包括像素电路和发光单元；
所述发光控制电路包括多个发光控制电路组，所述多个发光控制电路组与所述多行子像素一一对应，多个发光控制电路组中的每个所述发光控制电路组至少包括第一发光控制子电路和第二发光控制子电路；以及
所述第一发光控制子电路和所述第二发光控制子电路分别与一行子像素中的第一颜色子像素的像素电路和第二颜色子像素的像素电路连接并分别提供第一发光控制信号和第二发光控制信号，第一发光控制信号和第二发光控制信号分别配置为驱动所述像素电路向所述发光单元输出驱动电流。
在本公开的一些实施例中，所述第一发光控制信号和所述第二发光控制信号的占空比不同。
在本公开的一些实施例中，第一颜色子像素为蓝色子像素，第二颜色子像素为绿色子像素。
在本公开的一些实施例中，所述第一发光控制信号和所述第二发光控制信号为脉冲宽度调制PWM信号；以及所述第一发光控制信号的占空比大于所述第二发光控制信号的占空比。
在本公开的一些实施例中，所述第一发光控制信号的占空比为三分之二；以及所述第二发光控制信号的占空比为三分之一。
在本公开的一些实施例中，所述多行子像素的每行子像素还包括红色子像素，所述红色子像素的像素电路与所述第一发光控制子电路或所述第二发光控制子电路连接。
在本公开的一些实施例中，所述多行子像素中的每行子像素还包括红色子像素，所述多个发光控制电路组中的每个所述发光控制电路组还包括第三发光控制子电路，所述红色子像素与所述第三发光控制子电路连接。
本公开的至少一个实施例提供了一种显示面板，包括：阵列排布的多个子像素以及上述发光控制电路；所述发光控制电路分别与每行子像素中每个子像素的像素电路连接。
在本公开的一些实施例中，所述显示面板还包括源极驱动电路；所述源极 驱动电路分别与每一列子像素中每个子像素的像素电路连接，配置为向每一列子像素的像素电路提供数据信号，所述像素电路用于根据所述数据信号调节输出至所述发光单元的驱动电流的大小。
本公开的至少一个实施例提供了一种显示面板的驱动方法，适用于上述显示面板，所述方法包括：
通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号；以及
通过每组发光控制电路组中的每个发光控制子电路，向该发光控制子电路所连接的至少一种颜色的子像素中的像素电路输出发光控制信号。
在本公开的一些实施例中，所述数据信号配置为控制所述像素电路输出的驱动电流的大小；以及所述发光控制信号配置为控制所述子像素中的发光单元的发光时长。
在本公开的一些实施例中，所述多个发光控制电路组中的每个发光控制电路组中的任意两个所述发光控制子电路输出的发光控制信号的占空比不同，所述发光控制信号的占空比与所述发光单元的发光效率负相关。
在本公开的一些实施例中，所述源极驱动电路向第一颜色子像素的像素电路输出的补偿后的数据信号的电压小于补偿前的数据信号的电压，向第二颜色子像素的像素电路输出的补偿后的数据信号的电压大于补偿前的数据信号的电压。
在本公开的一些实施例中，所述第一发光控制子电路向所述第一颜色子像素的像素电路输出的第一发光控制信号的占空比大于第一阈值，所述第二发光控制子电路向所述第二颜色子像素的像素电路输出的第二发光控制信号的占空比小于第二阈值，所述第一阈值大于或等于所述第二阈值。
本公开的至少一个实施例还提供了一种显示装置，包括上述显示面板。
附图说明
为了更清楚地说明本公开实施例中的技术方案，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是根据本公开的一个实施例的显示面板的结构示意图；
图2是根据本公开的一个实施例的子像素的结构示意图；
图3是根据本公开的一个实施例的发光控制电路的结构示意图；
图4是根据本公开的另一个实施例的发光控制电路的结构示意图；
图5是根据本公开的一个实施例的发光控制子电路输出的发光控制信号的时序图；
图6是根据本公开的又一个实施例的发光控制电路的结构示意图；
图7是根据本公开的再一个实施例的发光控制电路的结构示意图；
图8是图7所示的发光控制子电路输出的发光控制信号的时序图；
图9是根据本公开的一个实施例的显示面板的结构示意图；
图10是根据本公开的一个实施例的显示面板的驱动方法的流程图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本公开的至少一个实施例提供了一种显示面板的发光控制电路，其中，所述显示面板包括多行子像素，所述多行子像素中的每行子像素包括至少第一颜色子像素和第二颜色子像素，所述第一颜色子像素和所述第二颜色子像素均包括像素电路和发光单元；所述发光控制电路包括多个发光控制电路组，所述多个发光控制电路组与所述多行子像素一一对应，多个发光控制电路组中的每个所述发光控制电路组至少包括第一发光控制子电路和第二发光控制子电路；所述第一发光控制子电路和所述第二发光控制子电路分别与一行子像素中的第一颜色子像素的像素电路和第二颜色子像素的像素电路连接并分别提供第一发光控制信号和第二发光控制信号，第一发光控制信号和第二发光控制信号分别配置为驱动所述像素电路向所述发光单元输出驱动电流。
图1是根据本公开的一个实施例的显示面板的结构示意图。参考图1可以看出，该显示面板可以包括阵列排布的多个子像素01、发光控制电路02、源极驱动电路03以及栅极驱动电路04。该多个子像素01位于显示面板的显示区域内，发光控制电路02、源极驱动电路03以及栅极驱动电路04均位于显示区域周边的***区域。该发光控制电路02也可以称为发射(emission，EM)电路。源极驱动电路03可以为集成电路(integrated circuit，IC)。栅极驱动电路04可以为阵列基板行驱动(gate driver on array，GOA)电路。该显示面板上的侧面 还可以设置有覆晶薄膜(chip on film，COF)，该COF是一种将发光控制电路02、源极驱动电路03以及栅极驱动电路04固定于柔性线路板上的晶粒软膜封装技术，是运用软质附加电路板作为封装芯片的载体将芯片与软性基板电路接合的技术。
图2是本公开的一个实施例的子像素的结构示意图，参考图2，每个子像素01可以包括像素电路011以及发光单元012，该发光单元012可以为有机发光二极管(organic light-emitting diode，OLED)。
结合图1和图2可以看出，发光控制电路02可以与每行子像素中的每个子像素的像素电路的发光控制端EM连接，配置为发光控制端EM提供发光控制信号。栅极驱动电路04可以与每行子像素中的每个子像素的像素电路的栅极信号端G连接，配置为该栅极信号端G提供栅极驱动信号。源极驱动电路03可以与每列子像素中的每个子像素的像素电路的数据信号端D连接，配置为该数据信号端D提供数据信号。该显示面板中，每个子像素的像素电路还可以与电源信号端VDD连接。
每个像素电路011可以在栅极驱动信号的驱动下，存储数据信号的数据电压。并且，每个像素电路011可以在接收到的发光控制信号为有效电平时，在电源信号端VDD的电能供应下，向发光单元012输出驱动电流，该驱动电流的大小与存储的数据电压的大小正相关。
显示面板中的多个子像素01一般包括：红色子像素、绿色子像素和蓝色子像素，其中，蓝色子像素中的发光单元的发光效率较低，绿色子像素中其发光单元的发光效率较高，红色子像素中的发光单元的发光效率，大于蓝色子像素中的发光单元的发光效率，而小于绿色子像素中其发光单元的发光效率。
因此，相关技术中，为了确保显示亮度的均一性，在显示相同亮度时，蓝色子像素中像素电路向发光单元输出的驱动电流I B较大，绿色子像素中像素电路向发光单元输出的驱动电流I G较小，红色子像素中像素电路向发光单元输出的驱动电流I R，大于蓝色子像素中像素电路向发光单元输出的驱动电流I B，小于绿色子像素中像素电路向发光单元输出的驱动电流I G，即I G<I R<I B。
由于发光单元的寿命与驱动电流负相关，即驱动电流越大，寿命越短，驱动电流越小，寿命越长。因此相关技术中的驱动方法会导致蓝色子像素的寿命降低。此外，由于绿色子像素中的发光单元的发光效率较高，在显示相同亮度时，其所需的驱动电流较小。因此在显示较低的亮度时，其所需的驱动电流会 进一步减小，从而源极驱动电路需要向该绿色子像素的像素电路输出的数据信号的电压也较小，可能会超出该源极驱动电路输出的数据信号的电压的调节范围，导致无法为该像素电路提供所需的电压。并且，当该绿色子像素中的像素电路向发光单元输出的驱动电流较小时，像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响较大，导致该发光单元的亮度偏差较大，影响显示面板的亮度均一性。又由于人眼对绿色子像素发出的光最敏感，因此当该绿色子像素中发光单元的亮度出现偏差时，人眼所观察到的显示面板的亮度均一性更差(mura)。
图3是本公开实施例提供的一种发光控制电路的结构示意图，可以解决相关技术中发光效率较低的发光单元的寿命较短以及发光效率较高的发光单元的亮度偏差较大的问题。该发光控制电路可以应用于图1所示的显示面板中。参考图3可以看出，该显示面板可以包括多行子像素，每行子像素可以包括多个不同颜色的子像素，图3中用不同的填充图案表示不同颜色的子像素。例如，图3所示的结构中，每行子像素可以包括第一颜色子像素01a和第二颜色子像素01b。参考图2，每个子像素可以包括像素电路011和发光单元012。
参考图3，该发光控制电路02可以包括：多个发光控制电路组021，所述多个发光控制电路组021中的每个发光控制电路组对应于一行子像素，每个发光控制电路组021可以包括至少两个发光控制子电路。每个发光控制子电路可以与一行子像素中的至少一种颜色的子像素中的像素电路的发光控制信号端连接并提供发光控制信号，该发光控制信号配置为驱动该像素电路向发光单元输出驱动电流。
每个发光控制电路组02中的至少两个发光控制子电路可以与同一行子像素连接，且任意两个发光控制子电路所连接的子像素的颜色不同。
例如，如图3所示，每个发光控制电路组021可以包括两个发光控制子电路0211和0212，在该显示面板中，每行子像素包括两种颜色的子像素：第一颜色子像素01a和第二颜色子像素01b，所述发光控制电路组021中的发光控制子电路0211可以与第一颜色子像素01a连接，所述发光控制电路组021中的发光控制子电路0212可以与第二颜色子像素01b连接。
例如，如图4所示，在该显示面板中，每行子像素包括三种颜色的子像素，即，除了图3所示的第一颜色子像素01a和第二颜色子像素01b外还包括第三颜色子像素01c，所述发光控制电路组021中的发光控制子电路0211可以与一 行子像素中的第一颜色子像素01a和第三颜色子像素01c连接，所述发光控制电路组021中的发光控制子电路0212可以与一行子像素中的第二颜色子像素01b连接。
在本公开的一个实施例中，所述发光控制电路组021中的至少两个发光控制子电路发出具有不同占空比的发光控制信号。发光控制子电路0211和发光控制子电路0212分别连接至不同颜色的子像素，例如，发光控制子电路0211连接至第一颜色子像素01a，发光控制子电路0212连接至第二颜色子像素01b。如果第一颜色子像素01a的发光单元的发光效率较低(例如，第一颜色为蓝色)，在一帧图像的显示过程中，发光控制子电路0211向第一颜色子像素01a输出具有大占空比的发光控制信号，增大第一颜色子像素01a的发光时长。与不增大第一颜色子像素01a的发光时长相比，为实现相同的发光亮度，需减小提供给第一颜色子像素01a的驱动电流，进而，可以延长第一颜色子像素01a的寿命。如果第二颜色子像素01b的发光效率较高(例如，第二颜色为绿色)，在一帧图像的显示过程中，发光控制子电路0212向第二颜色子像素01b输出具有小占空比的发光控制信号，减小第二颜色子像素01b的发光时长。与不减小第二颜色子像素01b的发光时长相比，为实现相同的发光亮度，需增大提供给第二颜色子像素01b的驱动电流。这样，在第二颜色子像素01b显示低亮度时，相对于不减小第二颜色子像素01b的发光时长，可以增大向第二颜色子像素01b的发光单元输出的驱动电流，减小像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响，确保了该显示面板的亮度均一性，提高了该显示面板的画质。
由于本公开实施例提供的发光控制电路包括多个发光控制电路组021，所述多个发光控制电路组021对应于一行子像素，每个发光控制电路组021可以包括至少两个发光控制子电路，每组发光控制电路组02包括的至少两个发光控制子电路可以与同一行子像素连接，且任意两个发光控制子电路所连接的子像素的颜色不同。因此可以根据各个子像素中发光单元的发光效率，调节发光控制子电路向不同颜色子像素中的像素电路输出的发光控制信号的占空比，也即是调节每个子像素中发光单元在一帧图像显示过程中的发光时长。进一步的，可以根据该发光控制信号的占空比调节源极驱动电路向每个子像素中的像素电路输出的数据信号的电压，也即，调节每个子像素中像素电路向发光单元输出的驱动电流的大小。
在本公开的实施例中，对于发光单元的发光效率较低的某种颜色的子像素 (例如蓝色子像素)，可以使发光控制子电路向该颜色的子像素输出占空比较大的发光控制信号，也即是增加该颜色的子像素中的发光单元在一帧图像显示过程中的发光时长，进而可以根据该占空比调节源极驱动电路向该颜色的子像素中的像素电路输出的数据信号的电压，使该颜色的子像素中像素电路向发光单元输出的驱动电流减小，进而提高该颜色的子像素的寿命。
对于发光单元的发光效率较高的某种颜色的子像素(例如绿色子像素)，可以使发光控制子电路向该颜色的子像素输出占空比较小的发光控制信号，也即是减小该颜色的子像素中的发光单元在一帧图像显示过程中的发光时长，进而可以根据该占空比增大源极驱动电路向该颜色的子像素中的像素电路输出的数据信号的电压，确保该电压不会超出该源极驱动电路输出的数据信号的电压的调节范围。并且，由于源极驱动电路向该颜色的子像素中的像素电路输出的数据信号的电压增大，因此该颜色的子像素中像素电路向发光单元输出的驱动电流也会增大，像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响较小，该发光单元的亮度偏差较小，确保了该显示面板的亮度均一性，提高了该显示面板的画质。
综上所述，本公开实施例提供了一种发光控制电路，该发光控制电路包括多个发光控制电路组，每个发光控制电路组包括至少两个发光控制子电路，所述至少两个发光控制子电路所所发出的发光控制信号的占空比不同。该至少两个发光控制电路可以与同一行的子像素连接，且任意两个发光控制子电路连接的子像素的颜色不同。因此，通过不同的发光控制子电路为不同颜色的子像素提供不同占空比的发光控制信号，调节不同颜色的子像素中发光单元在一帧图像显示过程中的发光时长，从而在实现相同显示亮度的情况下，调整源极驱动电路向不同颜色的子像素输出的数据信号的电压的大小，为子像素的发光效率低的发光单元提供较小的驱动电流，延长其寿命，为子像素的发光效率高的发光单元提供较大的驱动电流，减小在显示低亮度时阈值电压漂移对发光效率较高的发光单元的亮度的影响。
可选的，在本公开实施例中，显示面板中的每行子像素中第一颜色子像素01a可以为蓝色子像素，第二颜色子像素可以为绿色子像素01b。
每个发光控制电路组02包括的至少两个发光控制子电路中，第一发光控制子电路0211可以与一行子像素中蓝色子像素01a的像素电路的发光控制信号端连接，第二发光控制子电路0212可以与一行子像素中绿色子像素01b的像素电 路的发光控制信号端连接。
可选的，每个发光控制子电路输出的发光控制信号可以均为脉冲宽度调制(pulse width modulation，PWM)信号，并且该第一发光控制子电路0211输出的发光控制信号的占空比可以大于该第二发光控制子电路0212输出的发光控制信号的占空比。所述占空比，指的是在发光控制信号的一个周期内，有效电平的持续时长与发光控制信号的周期的时长的比值。在本公开中，以高电平为有效电平为例进行说明，占空比指的是高电平持续时间与发光控制信号的周期的时长的比值。当然，在实施本公开时，在发光控制子电路发出的发光控制信号中，有效电平也可以是低电平，此时，占空比指的是低电平持续时间与发光控制信号的周期的时长的比值。发光单元在一帧图像显示过程中的发光时长与发光控制信号的占空比正相关，也即是，发光控制信号的占空比越大，发光单元在一帧图像显示过程中的发光时长越长，发光控制信号的占空比越小，发光单元在一帧图像显示过程中的发光时长越短。
图5是本公开实施例提供的一种发光控制子电路输出的发光控制信号的时序图。其中，第一发光控制子电路0211输出的发光控制信号为EM1，第二发光控制子电路0212输出的发光控制信号为EM2。在图5所示的时序图中，低电平为有效电平，也即是，在像素电路接收到的发光控制信号为低电平时，该像素电路可以驱动发光单元发光。
如图5所示，该第一控制信号EM1和第二控制信号EM2的频率可以相同，且第一控制信号EM1的占空比可以大于第二控制信号EM2的占空比，也即是，与该第一发光控制子电路0211连接的子像素中的发光单元在一帧图像显示过程中的发光时长，可以大于与第二发光控制子电路0212连接的子像素中的发光单元在一帧图像显示过程中的发光时长。
在本公开实施例中，假设各子像素中的发光单元所需显示的亮度均为目标亮度，则像素电路向发光单元输出的驱动电流，可以与该发光单元在一帧图像显示过程中的发光时长负相关。也即是，发光单元显示的亮度不变时，发光单元在一帧图像显示过程中的发光时长越长，像素电路向发光单元输出的驱动电流可以越小；发光单元在一帧图像显示过程中的发光时长越短，像素电路向发光单元输出的驱动电流可以越大。
由于蓝色子像素01a中的发光单元的发光效率较低，因此第一发光控制子电路0211可以为该蓝色子像素01a输出占空比较大的发光控制信号，从而增加 该蓝色子像素01a在一帧图像显示过程中的发光时长。在增大该蓝色子像素01a在一帧图像显示过程中的发光时长的情况下，可以减小向该蓝色子像素01a的发光单元输出的驱动电流，同时保证该蓝色子像素01a的亮度为目标亮度，从而，可以提高该蓝色子像素01a的寿命。
由于绿色子像素01b中的发光单元的发光效率较高，因此第二发光控制子电路0212可以为该绿色子像素01b输出占空比较小的发光控制信号，从而减小该绿色子像素01b在一帧图像显示过程中的发光时长。在减小该绿色子像素01b在一帧图像显示过程中的发光时长的情况下，可以增大向该绿色子像素01b的发光单元输出的驱动电流并同时保证该绿色子像素01b的亮度为目标亮度，从而减小该绿色子像素01b的像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响，减小该绿色子像素01b中的发光单元的亮度偏差。同时，由于增大了向该绿色子像素01b的发光单元输出的驱动电流，其源极驱动电路向该绿色子像素01b中的像素电路输出的数据信号的电压也可以适当增大，在确保该电压不会超出该源极驱动电路输出的数据信号的电压的调节范围的情况下，降低了对源极驱动电路输出的数据信号的调节精度的要求。
如上所述，本公开实施例提供的发光控制电路可以平衡蓝色子像素的寿命和绿色子像素中的发光单元的亮度偏差的关系，也即是，不但可以提高蓝色子像素的寿命，还可以减小绿色子像素的发光单元的亮度偏差。
可选的，参考图5可以看出，发光控制信号的每个周期的时长可以为一帧图像显示过程的总时长的四分之一。也即是，一帧图像显示过程中，发光控制信号可以重复进行四个周期。
如图4所示，每行子像素还可以包括红色子像素01c，一行子像素中红色子像素01c的像素电路的发光控制信号端可以与第一发光控制子电路0211连接。也即是，红色子像素01c和蓝色子像素01a可以与同一个发光控制子电路，即第一发光控制子电路0211连接，而绿色子像素01b与第二发光控制子电路0212连接。此时，每一行子像素中的红色子像素01c和蓝色子像素01a接收到的发光控制信号的占空比相同，即该红色子像素01c和蓝色子像素01a中的发光单元在一帧图像的显示过程中的发光时长相同。
可选的，如图6所示，一行子像素中红色子像素01c的像素电路的发光控制信号端可以与第二发光控制子电路0212连接。也即是，红色子像素01c和绿色子像素01b可以与同一个发光控制子电路，即第二发光控制子电路0212连接， 而蓝色子像素01a与第一发光控制子电路0211连接。此时，每一行子像素中的红色子像素01c和绿色子像素01b接收到的发光控制信号的占空比相同，即该红色子像素01c和绿色子像素01b在一帧图像的显示过程中的发光时长相同。
可选的，参考图7，每个发光控制电路组02还可以包括第三发光控制子电路0213，每行子像素还可以包括红色子像素01c。该第三发光控制子电路0213可以与一行子像素中红色子像素01c的像素电路的发光控制信号端连接。也即是，红色子像素01c、绿色子像素01b以及蓝色子像素01a可以分别与不同的发光控制子电路连接，从而使该红色子像素01c、绿色子像素01b和蓝色子像素01a接收到的发光控制信号的占空比不同。
参考图8，图8分别示出了第一发光控制子电路0211发出的第一发光控制信号EM1、第二发光控制子电路0212发出的第二发光控制信号EM2以及第三发光控制子电路0213发出的第三发光控制信号EM3的波形图。由于红色子像素01c的发光效率大于蓝色子像素01a的发光效率，而小于绿色子像素01b的发光效率，因此第三发光控制子电路0213为该红色子像素01c输出的第三发光控制信号EM3的占空比，小于第一发光控制子电路0211为蓝色子像素01a输出的第一发光控制信号EM1的占空比，而大于第二发光控制子电路0212为绿色子像素01b输出的第二发光控制信号EM2的占空比。从而使该红色子像素01c中的发光单元在一帧图像的显示过程中的发光时长，小于蓝色子像素01a中的发光单元在一帧图像显示过程中的发光时长，而大于绿色子像素01b中的发光单元在一帧图像显示过程中的发光时长。
示例的，该第一发光控制子电路0211输出的第一发光控制信号EM1的占空比可以为三分之二。该第二发光控制子电路0212输出的第二发光控制信号EM2的占空比可以为三分之一。该第三发光控制子电路0213输出的第三发光控制信号EM3的占空比可以为二分之一。
需要说明的是，参考图3、图4、图6和图7可以看出，每个发光控制电路组包括的所述至少两个发光控制子电路可以设置在显示面板的同一侧，也可以分别设置在显示面板的两侧。例如，在图3所示的结构中，发光控制电路组021包括的第一发光控制子电路0211和第二发光控制子电路0212均设置在显示面板的左侧。在图4和图6所示的结构中，发光控制电路组021包括的第一发光控制子电路0211和第二发光控制子电路0212分别设置在显示面板的左右两侧。在图7所示的结构中，发光控制电路组021包括的第一发光控制子电路0211设 置在显示面板的左侧，第二发光控制子电路0212和第三发光控制子电路均设置在显示面板的右侧。
综上所述，本公开实施例提供了一种发光控制电路，该发光控制电路包括多个发光控制电路组，每个发光控制电路组包括至少两个发光控制子电路。该至少两个发光控制电路可以与同一行的子像素连接，且任意两个发光控制子电路连接的子像素的颜色不同。因此，可以通过不同的发光控制子电路为不同颜色的子像素提供不同占空比的发光控制信号，实现对不同颜色的子像素中发光单元在一帧图像显示过程中的发光时长的调节。从而可以在亮度不变的前提下，适当调整源极驱动电路提供给不同颜色的子像素的数据信号的电压的大小，提高了发光效率较低的发光单元的寿命，以及减小阈值电压漂移导致的发光效率较高的发光单元的亮度偏差，并且由于增大了该发光效率较高的发光单元的驱动电流，进而增大了源极驱动电路为该发光单元所连接的像素电路输出的数据信号的电压，确保该像素电路所需的电压不会超出数据信号的电压的调节范围。
图9是本公开实施例提供的一种显示面板的结构示意图。参考图1和图9可以看出，该显示面板可以包括：多个阵列排布的子像素01以及图3、图4、图6和图7任一所示的发光控制电路。该发光控制电路可以分别与每行子像素中每个子像素01的像素电路的发光控制信号端连接。该发光控制电路可以用于驱动显示面板中的多行子像素逐行发光。
示例的，假设该显示面板包括N行M列子像素，则该发光控制电路可以包括N组发光控制电路组。
参考图1和图9还可以看出，该显示面板还可以包括：源极驱动电路03。该源极驱动电路03可以分别与每一列子像素中每个子像素01的像素电路的数据信号端连接，用于为每一列子像素的像素电路提供数据信号，该像素电路配置为根据该数据信号调节输出至该发光单元的驱动电流的大小。
综上所述，本公开实施例提供了一种显示面板，该显示面板可以包括多个阵列排布的子像素以及发光控制电路。该发光控制电路可以分别与每行子像素中每个子像素的像素电路的发光控制信号端连接。该发光控制电路可以为不同颜色的子像素提供不同占空比的发光控制信号，对不同颜色的子像素中发光单元在一帧图像显示过程中的发光时长进行调节，从而在亮度不变的前提下，适当调整源极驱动电路为不同颜色的子像素输出的数据信号的电压的大小，提高 了发光效率较低的发光单元的寿命，以及减小发光效率较高的发光单元的亮度在阈值电压漂移影响下所产生的偏差，并且由于增大了该发光效率较高的发光单元的驱动电流，进而增大了源极驱动电路为该发光单元所连接的像素电路输出的数据信号的电压，确保该像素电路所需的电压不会超出数据信号的电压的调节范围。
图10是本公开实施例提供的一种显示面板的驱动方法的流程图，该方法可以应用于如图1或图9所示的显示面板。参考图10可以看出，该方法可以包括：
通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号；以及
通过每组发光控制电路组中的每个发光控制子电路，向该发光控制子电路所连接的至少一种颜色的子像素中的像素电路输出发光控制信号。
在所述驱动方法中，该补偿后的数据信号可以配置为控制该每一列子像素中的第一颜色子像素和第二颜色子像素中的像素电路输出的驱动电流的大小，并且该驱动电流的大小与该补偿后的数据信号的电压的大小正相关。
在本公开实施例中，源极驱动电路向第一颜色子像素中的像素电路输出的补偿后的数据信号的电压小于补偿前的数据信号的电压，向第二颜色子像素中的像素电路输出的补偿后的数据信号的电压大于补偿前的数据信号的电压。其中，该第一颜色子像素可以为发光单元的发光效率较低的子像素，第二颜色子像素可以为发光单元的发光效率较高的子像素。
示例的，该第一颜色子像素可以为蓝色子像素，第二颜色子像素可以为绿色子像素，则该源极驱动电路向蓝色子像素中的像素电路输出的补偿前的数据信号的电压为10V(伏)，补偿后的数据信号的电压可以为8V。该源极驱动电路向绿色子像素中的像素电路输出的补偿前的数据信号的电压为9V，补偿后的数据信号的电压可以为11V。也即是，该蓝色子像素的发光单元的驱动电流小于补偿前的驱动电流。该绿色子像素的发光单元的驱动电流大于补偿前的驱动电流。
需要说明的是，若显示面板中还包括第三颜色的子像素，且该第三颜色的子像素与第一颜色子像素连接至同一个发光控制子电路，则源极驱动电路向该颜色的子像素中的像素电路输出的补偿后的数据信号的电压，也可以小于补偿前的数据信号的电压。
或者，若显示面板中还包括第三颜色的子像素，且该第三颜色的子像素与 第二颜色子像素连接至同一个发光控制子电路，则源极驱动电路向该颜色的子像素中的像素电路输出的补偿后的数据信号的电压，也可以大于补偿前的数据信号的电压。
又或者，若显示面板中还包括第三颜色的子像素，且该第三颜色的子像素连接的发光控制子电路，与第一颜色子像素连接的发光控制子电路以及第二颜色子像素连接的发光控制子电路均不同，则源极驱动电路可以无需对该颜色的子像素中的像素电路的数据信号进行补偿。当然，源极驱动电路也可以根据发光控制子电路向该颜色的子像素输出的发光控制信号的占空比，对该颜色的子像素中的像素电路的数据信号进行相应的补偿。
在所述驱动方法中，在接收到的发光控制信号为有效电平时，像素电路可以驱动发光单元发光，因此该发光控制信号可以用于控制该子像素中的发光单元在一帧图像显示过程中的发光时长。
参考图3、图4、图6和图7可以看出，该显示面板中的发光控制电路可以包括多个发光控制电路组。在每个发光控制电路组中，任意两个发光控制子电路输出的发光控制信号的占空比不同，该发光控制信号的占空比与该发光控制子电路连接的子像素的发光单元的发光效率负相关。也即是，发光单元的发光效率越低，与包含该发光单元的子像素连接的发光控制子电路所发出的发光控制信号的占空比越大，发光单元的发光效率越高，与包含该发光单元的子像素连接的发光控制子电路所发出的发光控制信号的占空比越小。
示例的，对于发光效率较低的第一颜色子像素，发光控制子电路向该第一颜色子像素中的像素电路输出的发光控制信号的占空比大于第一阈值。对于发光效率较高的第二颜色子像素，发光控制子电路向第二颜色子像素中的像素电路输出的发光控制信号的占空比小于第二阈值。其中，第一阈值大于或等于第二阈值。
假设第一阈值为五分之三，则发光控制子电路向第一颜色子像素中的像素电路输出的发光控制信号的占空比可以为三分之二。假设第二阈值为第二阈值为五分之二，则发光控制子电路向第二颜色子像素中的像素电路输出的发光控制信号的占空比可以为三分之一。
可选的，在本公开实施例中，该第一颜色子像素可以为蓝色子像素，第二颜色子像素可以为绿色子像素。假设蓝色子像素和红色子像素与第一发光子电路连接，绿色子像素与第二发光控制子电路连接。因此，通过第一发光控制子 电路输出的发光控制信号的占空比可以较大，通过第二发光子电路输出的发光控制信号的占空比可以较小。
由于连接蓝色子像素的第一发光控制子电路输出的发光控制信号的占空比，大于连接绿色子像素的第二发光控制子电路输出的发光控制信号的占空比。因此，该蓝色子像素中的发光单元在一帧图像显示过程中的发光时长大于绿色子像素中的发光单元在一帧图像显示过程中的发光时长。例如，该蓝色子像素中的发光单元在一帧图像显示过程中的发光时长可以为24毫秒，绿色子像素中的发光单元在一帧图像显示过程中的发光时长可以为12毫秒。
对于蓝色子像素，由于其发光单元在一帧图像显示过程中的发光时长较长，因此在通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号时，通过源极驱动电路向该蓝色子像素中的像素电路输出的补偿后的数据信号的电压可以小于补偿前的数据信号的电压，使得该蓝色子像素中像素电路向发光单元输出的驱动电流减小，从而提高该蓝色子像素的寿命。
而对于绿色子像素，由于其发光单元在一帧图像显示过程中的发光时长较短，因此在通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号时，通过源极驱动电路向该绿色子像素中的像素电路输出的补偿后的数据信号的电压，可以大于补偿前的数据信号的电压。由此，可以增大该源极驱动电路向绿色子像素中的像素电路输出的数据信号的电压的调节范围，避免该源极驱动电路向该绿色子像素中的像素电路输出的电压超出数据信号的电压的调节范围，确保可以为该像素电路提供所需的电压。并且，在显示较低的亮度时，增大源极驱动电路向该绿色子像素中的像素电路输出的数据信号的电压，则该绿色子像素中像素电路向发光单元输出的驱动电流也会增大。因此，该绿色子像素的像素电路中的驱动晶体管的阈值电压漂移对该驱动电流的影响较小，可以减小该绿色子像素中的发光单元的亮度偏差。
当然，上述驱动方法还可以以相反的顺序进行，例如，通过每组发光控制电路组中的每个发光控制子电路，向该发光控制子电路所连接的至少一种颜色的子像素中的像素电路输出发光控制信号，并通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号。
综上所述，本公开实施例提供了一种显示面板的驱动方法。该方法可以通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号。并通过每组发光控制电路中的每个发光控制子电路，向该发光控制子电路所连接的至少一种颜色的子像素中的像素电路输出发光控制信号。从而通过不同的发光控制子电路向不同颜色的子像素提供不同占空比的发光控制信号，对不同颜色的子像素中发光单元在一帧图像显示过程中的发光时长进行调节，从而可以在亮度不变的前提下，调整源极驱动电路为不同颜色的子像素输出的数据信号的电压的大小，提高发光效率较低的发光单元的寿命，以及减小阈值电压漂移导致的发光效率较高的发光单元的亮度偏差。而且，由于增大了该发光效率较高的发光单元的驱动电流，进而增大了源极驱动电路为该发光单元所连接的像素电路输出的数据信号的电压，确保该像素电路所需的电压不会超出数据信号的电压的调节范围。
本公开实施例还提供了一种显示装置，该显示装置可以包括：图1或图9所示的显示面板。该显示装置可以为：液晶面板、电子纸、OLED面板、AMOLED面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该计算机可读存储介质在计算机上运行时，使得计算机执行上述方法实施例提供的显示面板的驱动方法。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的较佳实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种显示面板的发光控制电路，其中，所述显示面板包括多行子像素，所述多行子像素中的每行子像素包括至少第一颜色子像素和第二颜色子像素，所述第一颜色子像素和所述第二颜色子像素均包括像素电路和发光单元；
    所述发光控制电路包括多个发光控制电路组，所述多个发光控制电路组与所述多行子像素一一对应，多个发光控制电路组中的每个所述发光控制电路组至少包括第一发光控制子电路和第二发光控制子电路；以及
    所述第一发光控制子电路和所述第二发光控制子电路分别与一行子像素中的第一颜色子像素的像素电路和第二颜色子像素的像素电路连接并分别提供第一发光控制信号和第二发光控制信号，第一发光控制信号和第二发光控制信号分别配置为驱动所述像素电路向所述发光单元输出驱动电流。
  2. 根据权利要求1所述的发光控制电路，其中，所述第一发光控制信号和所述第二发光控制信号的占空比不同。
  3. 根据权利要求1或2所述的发光控制电路，其中，第一颜色子像素为蓝色子像素，第二颜色子像素为绿色子像素。
  4. 根据权利要求1至3中任何一项所述的发光控制电路，其中，所述第一发光控制信号和所述第二发光控制信号为脉冲宽度调制PWM信号；以及
    所述第一发光控制信号的占空比大于所述第二发光控制信号的占空比。
  5. 根据权利要求4所述的发光控制电路，其中，
    所述第一发光控制信号的占空比为三分之二；以及
    所述第二发光控制信号的占空比为三分之一。
  6. 根据权利要求1至4中任何一项所述的发光控制电路，其中，所述多行子像素的每行子像素还包括红色子像素，所述红色子像素的像素电路与所述第一发光控制子电路或所述第二发光控制子电路连接。
  7. 根据权利要求1至5中任何一项所述的发光控制电路，其中，所述多行子像素中的每行子像素还包括红色子像素，所述多个发光控制电路组中的每个所述发光控制电路组还包括第三发光控制子电路，所述红色子像素与所述第三发光控制子电路连接。
  8. 一种显示面板，包括：阵列排布的多个子像素以及如权利要求1至6任一所述的发光控制电路；
    所述发光控制电路分别与每行子像素中每个子像素的像素电路连接。
  9. 根据权利要求8所述的显示面板，其还包括：源极驱动电路；
    所述源极驱动电路分别与每一列子像素中每个子像素的像素电路连接，配置为向每一列子像素的像素电路提供数据信号，所述像素电路用于根据所述数据信号调节输出至所述发光单元的驱动电流的大小。
  10. 一种显示面板的驱动方法，适用于于如权利要求8所述的显示面板，所述方法包括：
    通过源极驱动电路向每一列子像素中第一颜色子像素的像素电路和第二颜色子像素的像素电路输出补偿后的数据信号；以及
    通过每组发光控制电路组中的每个发光控制子电路，向该发光控制子电路所连接的至少一种颜色的子像素中的像素电路输出发光控制信号。
  11. 根据权利要求10所述的驱动方法，其中，
    所述数据信号配置为控制所述像素电路输出的驱动电流的大小；以及
    所述发光控制信号配置为控制所述子像素中的发光单元的发光时长。
  12. 根据权利要求10或11所述的驱动方法，其中，所述多个发光控制电路组中的每个发光控制电路组中的任意两个所述发光控制子电路输出的发光控制信号的占空比不同，所述发光控制信号的占空比与所述发光单元的发光效率负相关。
  13. 根据权利要求10至12中任何一项所述的驱动方法，其中，所述源极驱动电路向第一颜色子像素的像素电路输出的补偿后的数据信号的电压小于补偿前的数据信号的电压，向第二颜色子像素的像素电路输出的补偿后的数据信号的电压大于补偿前的数据信号的电压。
  14. 根据权利要求10至13中任何一项所述的驱动方法，其中，所述第一发光控制子电路向所述第一颜色子像素的像素电路输出的第一发光控制信号的占空比大于第一阈值，所述第二发光控制子电路向所述第二颜色子像素的像素电路输出的第二发光控制信号的占空比小于第二阈值，所述第一阈值大于或等于所述第二阈值。
  15. 一种显示装置，其包括：根据权利要求8或9所述的显示面板。
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