WO2023201983A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2023201983A1
WO2023201983A1 PCT/CN2022/119923 CN2022119923W WO2023201983A1 WO 2023201983 A1 WO2023201983 A1 WO 2023201983A1 CN 2022119923 W CN2022119923 W CN 2022119923W WO 2023201983 A1 WO2023201983 A1 WO 2023201983A1
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WIPO (PCT)
Prior art keywords
sub
pixel
data line
light
voltage
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PCT/CN2022/119923
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English (en)
French (fr)
Inventor
常红燕
李伟
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惠科股份有限公司
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Priority to KR1020237031496A priority Critical patent/KR20230150314A/ko
Publication of WO2023201983A1 publication Critical patent/WO2023201983A1/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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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]
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • 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
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display technology, and in particular to a backlight module and a display device.
  • the display device includes a backlight module and a display panel.
  • the display panel includes multiple scan lines, multiple data lines, multiple sub-pixels, and multiple switch circuits corresponding to the multiple sub-pixels.
  • the backlight module is used to provide light sources for multiple sub-pixels on the display panel.
  • the scan line control switch circuit is turned on.
  • the data line writes data voltage into the corresponding sub-pixel through the switch circuit, charges the sub-pixel, and causes the corresponding sub-pixel to emit light.
  • multiple scan lines output scan signals one by one to control multiple sub-pixels to emit light row by row.
  • the polarity of the data voltage output by each data line remains unchanged relative to the common voltage.
  • One purpose of the embodiments of the present application is to provide a backlight module and a display device that can solve the problem of uneven brightness of display panels in related technologies.
  • a backlight module for use in a display device.
  • the display device includes a display panel.
  • the display panel includes a plurality of sub-pixels and M data lines. Each data line in the M data lines is Each line is connected to at least two sub-pixels among the plurality of sub-pixels, and the M is an integer greater than 3;
  • the backlight module includes a plurality of light-emitting devices and a controller, and the plurality of light-emitting devices correspond to the plurality of sub-pixels one by one, so that the plurality of light-emitting devices provide light sources for the plurality of sub-pixels one by one.
  • the controller is used to control the luminous brightness of each light-emitting device in the plurality of light-emitting devices;
  • the controller is used to control the first luminous brightness to be greater than the second luminous brightness when the target gray level of the j+1th sub-pixel connected to the i-th data line among the M data lines remains unchanged;
  • the first The luminous brightness is the luminous brightness of the light-emitting device corresponding to the j+1th sub-pixel connected to the i-th data line when the j-th sub-pixel connected to the i-th data line does not emit light;
  • the second luminous brightness is When the j-th sub-pixel connected to the i-th data line emits light, the luminous brightness of the light-emitting device corresponding to the j+1-th sub-pixel connected to the i-th data line, where i is an integer greater than 1 and less than M , the j is a positive integer.
  • the backlight module further includes a plurality of driving circuits, the plurality of driving circuits correspond to the plurality of light-emitting devices, and the first input terminal of each driving circuit in the plurality of driving circuits is Both are connected to the output end of the power supply, and the output end of each drive circuit in the plurality of drive circuits is connected to the corresponding light-emitting device;
  • the controller is connected to the second input end of each drive circuit in the plurality of drive circuits, and the controller is used to control the drive current output by each drive circuit to the corresponding light-emitting device to control the multiple drive circuits.
  • the luminous brightness of each of the light-emitting devices is connected to the second input end of each drive circuit in the plurality of drive circuits, and the controller is used to control the drive current output by each drive circuit to the corresponding light-emitting device to control the multiple drive circuits.
  • the luminous brightness of each of the light-emitting devices is connected to the second input end of each drive circuit in the plurality of drive circuits, and the controller is used to control the drive current output by each drive circuit to the corresponding light-emitting device to control the multiple drive circuits.
  • each of the plurality of driving circuits includes a first transistor, a second transistor and a capacitor;
  • the input terminal of the first transistor is connected to the output terminal of the power supply, the output terminal of the first transistor is connected to the light-emitting device corresponding to the driving circuit, and the control terminal of the first transistor is connected to the second transistor.
  • the first plate of the capacitor is connected to the input end of the first transistor, and the second plate of the capacitor is connected to the control end of the first transistor;
  • the input terminal of the second transistor is connected to the controller, and the controller controls the driving current output by each driving circuit to the corresponding light-emitting device by controlling the voltage output to the input terminal of the second transistor.
  • the controller stores a first corresponding relationship, which is a corresponding relationship between the target gray level and the first voltage; the controller is configured to: connect the i-th data line When the j-th sub-pixel does not emit light, the corresponding first voltage is obtained from the first correspondence relationship according to the target gray level of the j+1-th sub-pixel connected to the i-th data line, and the corresponding first voltage is obtained according to the first The voltage is input to the input end of the second transistor of the driving circuit corresponding to the j+1th sub-pixel connected to the i-th data line;
  • the controller stores a second corresponding relationship, the second corresponding relationship is the corresponding relationship between the target gray level and the second voltage, and any target gray level corresponds to the first voltage in the first corresponding relationship. is greater than the corresponding second voltage in the second correspondence relationship; the controller is configured to: when the j-th sub-pixel connected to the i-th data line emits light, according to the j-th sub-pixel connected to the i-th data line The target gray level of the +1 sub-pixel obtains the corresponding second voltage from the second correspondence relationship, and supplies the driving circuit corresponding to the j+1-th sub-pixel connected to the i-th data line according to the second voltage. input voltage to the input terminal of the second transistor.
  • the target gray level when the target gray level is greater than or equal to 0 and less than or equal to 8, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.15 volts; the target gray level When the target gray level is greater than 8 and less than or equal to 20, the difference between the first voltage and the second voltage increases by 0.02 volts for every increase of 1 gray level; when the target gray level is greater than 20 and less than or equal to 220, every time Increasing 1 gray level, the difference between the first voltage and the second voltage increases by 0.01 volt; when the target gray level is greater than 220 and less than or equal to 225, for each additional gray level, the first voltage and The difference between the second voltage increases by 0.02 volts; when the target gray level is greater than 225 and less than or equal to 238, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.03 volts ; When the target gray level is greater than 238 and less than or equal to 244, for every additional gray level, the difference between the first voltage and the
  • the controller controls the third luminous brightness to be equal to the first luminous brightness;
  • the third luminous brightness is the luminous brightness of the light-emitting device corresponding to the p-th sub-pixel connected to the first data line; wherein, the p is a positive integer, and the color of the p-th sub-pixel connected to the first data line is the same as the j+1-th sub-pixel connected to the i-th data line.
  • the controller controls the fourth luminous brightness to be equal to the first luminous brightness;
  • the fourth luminous brightness is the luminous brightness of the light-emitting device corresponding to the p-th sub-pixel connected to the M-th data line; wherein, the p is a positive integer, and the color of the p-th sub-pixel connected to the M-th data line is the same as the j+1-th sub-pixel connected to the i-th data line.
  • each of the plurality of light-emitting devices is one of a sub-millimeter light-emitting diode and a micro-light-emitting diode.
  • a display device including a display panel and a backlight module as described in any one of the first aspects;
  • the display panel includes a plurality of sub-pixels and M data lines, each of the M data lines is connected to at least two sub-pixels of the plurality of sub-pixels, and M is an integer greater than 3.
  • the plurality of sub-pixels are arranged in N rows and M-1 columns, and j is a positive integer less than or equal to N-1;
  • the 1st data line among the M data lines is connected to the 1st sub-pixel in the odd-numbered row, and the M-th data line among the M data lines is connected to the M-1th sub-pixel in the even-numbered row.
  • the i-th data line is connected to the i-th sub-pixel in the odd-numbered row and the i-1-th sub-pixel in the even-numbered row.
  • the backlight module includes multiple light-emitting devices and a controller.
  • the multiple light-emitting devices provide light sources for multiple sub-pixels one by one.
  • the controller is used to control the luminance of each light-emitting device.
  • the controller controls the first luminous brightness to be greater than the second luminous brightness.
  • the first luminescence brightness is the luminescence brightness of the light-emitting device corresponding to the j+1th sub-pixel connected to the i-th data line when the j-th sub-pixel connected to the i-th data line does not emit light.
  • the second luminous brightness is the luminous brightness of the light-emitting device corresponding to the j+1th sub-pixel connected to the i-th data line when the j-th sub-pixel connected to the i-th data line emits light. That is to say, for multiple sub-pixels connected to the i-th data line, if the data line does not need to charge one of the sub-pixels, then when the next sub-pixel emits light, the controller will increase the power of the light-emitting device corresponding to the next sub-pixel.
  • the luminous brightness can be adjusted to achieve the target gray level of the next sub-pixel, thus improving the brightness uniformity of the display panel.
  • Figure 1 is a schematic structural diagram of a display panel provided in Embodiment 1 of the present application.
  • Figure 2 is a schematic structural diagram of a display device from a first perspective according to Embodiment 1 of the present application;
  • FIG. 3 is a schematic structural diagram of a display device from a second perspective according to Embodiment 1 of the present application;
  • Figure 4 is a schematic circuit structure diagram of a backlight module provided in Embodiment 2 of the present application.
  • Figure 5 is a circuit structure diagram of a driving circuit provided in Embodiment 2 of the present application.
  • FIG. 6 is a schematic structural diagram of a display device provided in Embodiment 5 of the present application.
  • Backlight modules are used in display devices.
  • the display device also includes a display panel.
  • the display panel includes multiple sub-pixels, multiple switch circuits, multiple scan lines and multiple data lines. Among them, the number of switch circuits is equal to the number of sub-pixels. Multiple switch circuits are connected to multiple sub-pixels in one-to-one correspondence.
  • Each switching circuit has an input terminal, an output terminal, and a control terminal. The control end of the switching circuit is used to control conduction and disconnection between the input end and the output end of the switching circuit.
  • each switch circuit in the plurality of switch circuits is connected to a data line
  • the control end of each switch circuit is connected to a scan line
  • the output end of each switch circuit is connected to the corresponding sub-pixel.
  • all switch circuits connected to the scan line are turned on.
  • the switch circuit is turned on, the data voltage in the data line can be output to the sub-pixel connected to the switch circuit through the switch circuit.
  • each sub-pixel may include a pixel electrode, and may also include a color resistor located on the pixel electrode.
  • the pixel electrode is used to form a voltage difference with the common electrode.
  • FIG. 1 is a schematic structural diagram of a display panel 10 provided by this application.
  • the display panel 10 includes 36 sub-pixels 110 , 36 switching circuits 120 , 4 scanning lines 140 and 10 data lines 130 .
  • 36 sub-pixels 110 are arranged in 4 rows and 9 columns, and the 36 sub-pixels 110 include 12 R (Red, red) sub-pixels, 12 G (Green, green) sub-pixels and 12 B (Blue, blue) sub-pixel.
  • the switch circuits 120 correspond to the sub-pixels 110 one-to-one, and the output terminal of each switch circuit 120 is connected to the corresponding sub-pixel 110.
  • the ten data lines 130 are respectively called S1, S2...S10.
  • the four scan lines 140 are called G1, G2, G3 and G4 respectively.
  • Each data line 130 extends along the column direction, and each scan line 140 extends along the row direction.
  • the control terminals of the switch circuits 120 corresponding to the sub-pixels 110 located in the first row are connected to G1, and the control terminals of the switch circuits 120 corresponding to the sub-pixels 110 located in the second row are connected to G2...
  • S1 is located in the odd row (th
  • the input end of the switch circuit 120 corresponding to the first sub-pixel 110 in rows 1 and 3 is connected, and S10 is connected to the switch circuit 120 corresponding to the 9th sub-pixel 110 in the even rows (rows 2 and 4). Input connection.
  • Si that is, the i-th data line 130 from left to right on the paper, i is an integer greater than 1 and less than 10, such as i equals 2, 3, 4 or 9) is located at an odd number.
  • the input end of the switch circuit 120 corresponding to the i-th sub-pixel 110 in the row is connected to the input end of the switch circuit 120 corresponding to the i-1 th sub-pixel 110 located in the even-numbered row.
  • G1, G2, G3 and G4 sequentially output scanning signals.
  • G1 outputs a scanning signal
  • all switch circuits 120 corresponding to the sub-pixels 110 located in the first row are turned on.
  • S1 to S9 output data voltages to charge all sub-pixels 110 located in the first row, thereby causing all sub-pixels 110 located in the first row to emit light.
  • G2 outputs a scanning signal
  • all switch circuits 120 corresponding to the sub-pixels 110 located in the second row are turned on.
  • S2 to S10 output data voltages, which can charge all sub-pixels 110 located in the second row, thereby causing all sub-pixels 110 located in the second row to emit light...
  • the data voltage output by S1 can be equal to 7V
  • the data output by S2 can be equal to 7V
  • the voltage can be constant equal to -7V
  • the data voltage output by S3 can be constant equal to 7V
  • the data voltage output by S10 can be constant equal to -7V.
  • the data voltage output by S1 can be equal to -7V
  • the data voltage output by S2 can be equal to 7V
  • the data voltage output by S3 can be equal to -7V
  • the data voltage output by S10 can be equal to 7V .
  • some sub-pixels 110 in the display panel 10 do not emit light, that is, the data line 130 does not need to charge some sub-pixels 110 .
  • the display panel 10 is used to display a blue-green picture, all R sub-pixels in the display panel 10 do not emit light.
  • S3 when G1 outputs the scanning signal, S3 needs to output the data voltage (such as 7V) to the third sub-pixel 110 located in the first row, that is, the B sub-pixel .
  • S3 When G2 outputs the scanning signal, S3 needs to output the data voltage (eg, 7V) to the second sub-pixel 110 located in the second row, that is, the G sub-pixel. That is to say, when G1 and G2 output scanning signals in sequence, the voltage in S3 is always 7V. In other words, during this process, the data voltage written in the second sub-pixel 110 located in the second row does not need to rise from 0 to 7V.
  • S5 does not need to output the data voltage to the fourth sub-pixel 110 located in the second row, that is, the R sub-pixel. At this time, the voltage in S5 is 0.
  • S5 When G3 outputs the scanning signal, S5 needs to output the data voltage (eg, 7V) to the fifth sub-pixel 110 located in the third row, that is, the G sub-pixel.
  • the voltage in S5 needs to climb from 0 to 7V.
  • the data voltage written by the fifth sub-pixel 110 located in the third row needs to rise from 0 to 7V.
  • the charge amount of the fifth sub-pixel 110 located in the third row must be lower than that of the second sub-pixel 110 located in the second row of the same color.
  • the second sub-pixel 110 located in the third row connected to S2 the fifth sub-pixel 110 located in the third row connected to S5, and the fifth sub-pixel 110 located in the third row connected to S8
  • the charging amounts of the 8th sub-pixel 110 are all lower than the charging amounts of the G sub-pixels connected to S3, S6 and S9.
  • the 3rd sub-pixel 110 located in the 2nd row connected to S4 the 3rd sub-pixel 110 located in the 4th row connected to S4
  • the 6th sub-pixel 110 located in the 2nd row connected to S7 the 4th sub-pixel 110 connected to S7 located in the 4th row.
  • the charging amount of the sixth sub-pixel 110 of the row is lower than that of the three sub-pixels 110 connected by S3 and located in the third row and the three sub-pixels 110 connected by S6 and located in the third row.
  • FIG. 2 is a schematic structural diagram of a display device 30 provided in Embodiment 1 of the present application from a first perspective (data lines are not shown in the figure);
  • FIG. 3 is a second view of a display device 30 provided in Embodiment 1 of the present application. Structural diagram of the viewing angle (data lines and other scan lines except G1 are not shown in the figure). Among them, the first perspective and the second perspective are two different perspectives.
  • the display device 30 includes a backlight module 20 and the above-mentioned display panel 10 .
  • the backlight module 20 includes a plurality of light-emitting devices 210 and a controller 220 (not shown in the figure).
  • the number of light-emitting devices 210 is equal to the number of sub-pixels 110 in the display panel 10 .
  • the plurality of light-emitting devices 210 correspond to the plurality of sub-pixels 110 on a one-to-one basis, so that each light-emitting device 210 provides a light source for and only one sub-pixel 110 .
  • the controller 220 may be connected to a plurality of light-emitting devices 210 to control the lighting brightness of each light-emitting device 210 . Among them, for the j+1-th sub-pixel 110 connected to the i-th data line 130 among the M data lines 130 whose target gray level remains unchanged, the controller 220 controls the first luminous brightness to be greater than the second luminous brightness.
  • the first luminescence brightness is the luminescence brightness of the light-emitting device 210 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • the second luminous brightness is the luminous brightness of the light-emitting device 210 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 when the j-th sub-pixel 110 connected to the i-th data line 130 emits light.
  • M is equal to 10. In some other not-shown embodiments, M may be any integer greater than 2, such as M equal to 10, 13 or 7, etc. In some specific embodiments, M is equal to 5761. i is an integer greater than 1 and less than M, and j is a positive integer.
  • the display device 30 when the display device 30 is working, an electric field is formed between the pixel electrode and the common electrode in the sub-pixel 110 of the display panel 10, and the liquid crystal rotates under the action of the electric field, so that the light emitted by the light-emitting device 210 can pass through the corresponding of sub-pixels 110.
  • the M data lines 130 when the i-th data line 130 does not need to charge the j-th sub-pixel 110 and needs to charge the j+1-th sub-pixel 110 (that is, the j-th data line 130 connected to the i-th data line 130 does not need to charge the j-th sub-pixel 110).
  • the charging amount of the j+1-th sub-pixel 110 will not reach the charging amount required for emitting light, that is, the pixel If the voltage of the electrode cannot reach the voltage required for light emission, the rotation angle of the liquid crystal will be small, resulting in the j+1th sub-pixel 110 emitting dark light.
  • the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light
  • increasing the luminous brightness of the light-emitting device 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 can improve the j-th sub-pixel 110 connected to the i-th data line 130.
  • the luminous brightness of the j+1th sub-pixel 110 connected to the i-th data line 130 makes the actual gray level of the j+1-th sub-pixel 110 connected to the i-th data line 130 reach the target gray level, thereby improving the display panel 10 Brightness uniformity.
  • the target gray level is used to represent the target brightness of the sub-pixel 110
  • the actual gray level is used to represent the actual brightness of the sub-pixel 110.
  • the following describes how the controller 220 controls the luminous brightness of the light-emitting device 210 .
  • FIG. 4 is a schematic circuit structure diagram of a backlight module 20 provided in Embodiment 2 of the present application. As shown in FIG. 4 , the backlight module 20 further includes a plurality of driving circuits 230 .
  • the number of driving circuits 230 is the same as the number of light-emitting devices 210 .
  • the plurality of driving circuits 230 correspond to the plurality of light-emitting devices 210 one-to-one, so that each driving circuit 230 is used and only used to drive one light-emitting device 210 to emit light.
  • Each of the plurality of driving circuits 230 has a first input terminal b, a second input terminal e, and an output terminal d.
  • the first input terminal b of each driving circuit 230 is connected to the output terminal a of the power supply 32
  • the output terminal d of each driving circuit 230 is connected to the corresponding light-emitting device 210 .
  • each driving circuit 230 is connected to the controller 220 .
  • the controller 220 when the controller 220 is working, it can control each light-emitting device 210 by controlling the driving current output by each driving circuit 230 to the corresponding light-emitting device 210 .
  • luminous brightness Generally, the greater the driving current output by the driving circuit 230 to the corresponding light-emitting device 210, the higher the brightness of the corresponding light-emitting device 210.
  • the working process of the controller 220 can also be described as: for the j+1th sub-pixel 110 connected to the i-th data line 130 whose target gray level remains unchanged, the controller 220
  • the driving circuit 230 corresponding to the light-emitting device 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 is controlled to output a driving current greater than the i-th data
  • the driving current output by the driving circuit 230 corresponding to the light-emitting device 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 is output.
  • the output of the driving circuit 230 corresponding to the light-emitting device 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 is increased. of driving current.
  • the luminous brightness of the j+1th sub-pixel 110 connected to the i-th data line 130 can be increased, so that the actual gray level of the j+1-th sub-pixel 110 connected to the i-th data line 130 reaches the target gray level, and then The brightness uniformity of the display panel 10 is improved.
  • FIG. 5 is a circuit structure diagram of a driving circuit 230 provided in Embodiment 2 of the present application.
  • the driving circuit 230 may include a first transistor TFT1 , a second transistor TFT2 and a capacitor C. Both the first transistor TFT1 and the second transistor TFT2 here may be thin film transistors (TFT).
  • the input terminal of the first transistor TFT1 is connected to the output terminal a of the power supply 32 . That is to say, the input terminal of the first transistor TFT1 is the first input terminal b of the driving circuit 230 .
  • the output terminal of the first transistor TFT1 is connected to the light emitting device 210 corresponding to the driving circuit 230 .
  • the output terminal of the first transistor TFT1 is the output terminal d of the driving circuit 230 .
  • the control terminal of the first transistor TFT1 is connected to the output terminal of the second transistor TFT2.
  • the capacitor C is connected between the control terminal and the output terminal of the first transistor TFT1.
  • the first plate of the capacitor C is connected to the input terminal of the first transistor TFT1
  • the second plate of the capacitor C is connected to the control terminal of the first transistor TFT1.
  • the input terminal of the second transistor TFT2 is connected to the controller 220 . That is to say, the input terminal of the second transistor TFT2 is the second input terminal e of the driving circuit 230 .
  • the control terminal of the second transistor TFT2 is used to input the SCAN1 signal.
  • the light emitting device 210 is one of a sub-millimeter light emitting diode (miniLED) and a micro light emitting diode (microLED).
  • miniLED refers to light-emitting diodes with a size between 100 microns and 200 microns
  • microLED refers to light-emitting diodes with a size below 100 microns.
  • the anode of the light-emitting device 210 may be connected to the output terminal of the first transistor TFT1, and the cathode of the light-emitting device 210 may be connected to the common ground terminal VSS.
  • the working process is described: in the first time period, the control terminal of the second transistor TFT2 inputs the SCAN1 signal, causing the second transistor TFT2 to turn on. At the same time, the controller 220 outputs a voltage. The voltage output by the controller 220 can be written into the capacitor C, thereby being stored by the capacitor C. In the second time period after the first time period, the control terminal of the second transistor TFT2 no longer inputs the SCAN1 signal, and the second transistor TFT2 is turned off. At this time, the capacitor C discharges to the control terminal of the first transistor TFT1, causing the first transistor TFT1 to turn on.
  • the first transistor TFT1 When the first transistor TFT1 is turned on, a path is formed between the output terminal a of the power supply 32 , the first transistor TFT1 , the light-emitting device 210 and the common ground terminal, so that current flows through the light-emitting device 210 and the light-emitting device 210 emits light.
  • the luminance of the light-emitting device 210 depends on the output current of the first transistor TFT1
  • the output current of the first transistor TFT1 depends on the voltage of the capacitor C, that is, it depends on the voltage output to the capacitor C by the controller 220.
  • the controller 220 when the controller 220 is working, by controlling the voltage output to the input end of the second transistor TFT2 of each driving circuit 230, the size of the driving current output by each driving circuit 230 to the corresponding light-emitting device 210 can be controlled, thereby controlling The luminance of each light-emitting device 210.
  • the controller 220 stores the first corresponding relationship.
  • the first corresponding relationship is the corresponding relationship between the target gray level and the first voltage.
  • the first correspondence relationship can be as shown in Table 1 below:
  • the first correspondence relationship applies to the case where the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light. That is to say, when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the controller 220 changes from the first corresponding to the target grayscale of the j+1-th sub-pixel 110 connected to the i-th data line 130.
  • the corresponding first voltage is obtained from the relationship, and a voltage is input to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 according to the first voltage.
  • i when all R sub-pixels do not emit light, i may be equal to 5 and j may be equal to 2. That is to say, the second sub-pixel 110 connected to the fifth data line 130 (that is, the fourth sub-pixel 110 located in the second row connected to S5) does not emit light.
  • the controller 220 controls the target gray value of the third sub-pixel 110 connected to S5 according to the target gray value of the third sub-pixel 110 connected to S5. The stage obtains the corresponding first voltage from the first correspondence relationship.
  • the controller 220 can output a voltage of V16 volts to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S5.
  • i can also be equal to 8 and j can be equal to 2. That is to say, the second sub-pixel 110 connected to the eighth data line 130 (that is, the seventh sub-pixel 110 located in the second row connected to S8) does not emit light.
  • the controller 220 determines the target gray value of the third sub-pixel 110 connected to S8.
  • the stage obtains the corresponding first voltage from the first correspondence relationship. For example, when the target gray level of the third sub-pixel 110 connected to S8 is 007, the first voltage obtained by the controller 220 is V7 volts. At this time, the controller 220 can output a voltage of V7 volts to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S8.
  • the controller 220 also stores a second corresponding relationship.
  • the second corresponding relationship is the corresponding relationship between the target gray level and the second voltage.
  • the second correspondence relationship can be shown in Table 2 below:
  • the second correspondence relationship applies to the case where the j-th sub-pixel 110 connected to the i-th data line 130 emits light. That is to say, when the j-th sub-pixel 110 connected to the i-th data line 130 emits light, the controller 220 determines the second corresponding relationship based on the target grayscale of the j+1-th sub-pixel 110 connected to the i-th data line 130. The corresponding second voltage is obtained from , and the voltage is input to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 according to the second voltage.
  • i can be equal to 5 and j can be equal to 2" as an example, that is to say, the second sub-pixel 110 connected to the fifth data line 130 (that is, the fourth sub-pixel 110 located in the second row connected to S5) emits light.
  • the controller 220 controls the target gray value of the third sub-pixel 110 connected to S5 according to the target gray value of the third sub-pixel 110 connected to S5. The step obtains the corresponding second voltage from the second correspondence relationship.
  • the controller 220 can output a voltage of V16-1.51 volts to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S5.
  • the control The voltage output by the transistor 220 to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S5 increases by 1.51 volts. In this way, when the charging capacity of the third sub-pixel 110 connected by S5 is insufficient, it can be ensured that the actual gray level of the sub-pixel 110 reaches the target gray level, thereby improving the brightness uniformity of the display panel 10 .
  • the controller 220 determines the target gray value of the third sub-pixel 110 connected to S8.
  • the step obtains the corresponding second voltage from the second correspondence relationship. For example, when the target gray level of the third sub-pixel 110 connected to S8 is 007, the second voltage obtained by the controller 220 is V7-1.2 volts.
  • the controller 220 can output a voltage of V7-1.2 volts to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S8. It can be seen from this that for the third sub-pixel 110 connected by S8 with the target gray level of 007, compared with the situation when the second sub-pixel 110 connected by S8 emits light, when the second sub-pixel 110 connected by S8 does not emit light, the control The voltage output by the transistor 220 to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third sub-pixel 110 connected to S8 increases by 1.2 volts. In this way, when the charging capacity of the third sub-pixel 110 connected by S8 is insufficient, it can be ensured that the actual gray level of the sub-pixel 110 reaches the target gray level, thereby improving the brightness uniformity of the display panel 10 .
  • the target gray level when the target gray level is greater than or equal to 0 and less than or equal to 8, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.15 Volt.
  • the target gray level is greater than 8 and less than or equal to 20, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.02 volts.
  • the target gray level is greater than 20 and less than or equal to 220, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.01 volt.
  • the target gray level is greater than 220 and less than or equal to 225, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.02 volts.
  • the target gray level is greater than 225 and less than or equal to 238, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.03 volts.
  • the target gray level is greater than 238 and less than or equal to 244, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.04 volts.
  • the target gray level is greater than 244 and less than or equal to 247, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.05 volts.
  • the target gray level is greater than 247 and less than or equal to 255, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.06 volts.
  • the controller 220 may have a first corresponding relationship and a second corresponding relationship respectively for R sub-pixels, G sub-pixels and B sub-pixels.
  • the controller 220 obtains the corresponding first voltage from the first relationship corresponding to the R subpixel.
  • the controller 220 obtains the corresponding second voltage from the second relationship corresponding to the R sub-pixel. If the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the j+1-th sub-pixel 110 connected to the i-th data line 130 emits light, and the j+1-th sub-pixel 110 connected to the i-th data line 130 emits light.
  • the controller 220 obtains the corresponding first voltage from the first relationship corresponding to the G sub-pixel. If the j-th sub-pixel 110 connected to the i-th data line 130 emits light, the j+1-th sub-pixel 110 connected to the i-th data line 130 emits light, and the j+1-th sub-pixel 110 connected to the i-th data line 130 is G sub-pixel, the controller 220 obtains the corresponding second voltage from the second relationship corresponding to the G sub-pixel.
  • the controller 220 obtains the corresponding first voltage from the first relationship corresponding to the B sub-pixel.
  • the controller 220 obtains the corresponding second voltage from the second relationship corresponding to the B sub-pixel.
  • the controller 220 obtains it from the first relationship corresponding first voltage. If the j-th sub-pixel 110 connected to the i-th data line 130 emits light, and the j+1-th sub-pixel 110 connected to the i-th data line 130 emits light, the controller 220 obtains the corresponding second voltage from the second relationship. In this specific embodiment, the color of each sub-pixel 110 is no longer distinguished.
  • the driving circuit 230 also has a variable resistor.
  • the controller 220 is connected to the variable resistor in each drive circuit 230 .
  • the controller 220 can control the resistance of the variable resistor in each drive circuit 230, so that each drive circuit 230 outputs a drive current to the corresponding light-emitting device 210, thereby controlling the light emission of each light-emitting device 210. brightness.
  • the controller 220 can control the resistance of the variable resistor in the driving circuit 230 corresponding to the light-emitting device 210 to decrease; conversely, when it is necessary to decrease the brightness of a certain light-emitting device 210 When the lighting brightness reaches 210, the controller 220 can control the resistance of the variable resistor in the driving circuit 230 corresponding to the light-emitting device 210 to increase. No longer.
  • the The luminous brightness of the light-emitting device 210 corresponding to the j+1th sub-pixel 110 connected to the i data line 130 achieves the purpose of improving the brightness uniformity of the display panel 10 .
  • i is an integer greater than 1 and less than M.
  • j is a positive integer.
  • the first data line 130 (i.e., S1 ) is connected to the input end of the switch circuit 120 corresponding to the first sub-pixel 110 located in the odd row (row 1 and row 3).
  • the display panel 10 displays a frame of image, if all the sub-pixels 110 connected to S1 are emitting light, then: before G1 outputs the scanning signal, the voltage in S1 is 0; when G1 outputs the scanning signal, S1 needs to output data.
  • the 1st subpixel of row 3 is 110.
  • the voltage in S1 needs to climb from 0 to 7V.
  • the display panel 10 displays a frame of image, if the p-th sub-pixel 110 connected to S1 emits light, the data voltage written in the p-th sub-pixel 110 connected to S1 needs to rise from 0 to 7V. In this case, the charge level of the p-th sub-pixel 110 connected to S1 is insufficient, which may cause the sub-pixel 110 to emit dark light.
  • p can be any positive integer.
  • the controller 220 works: if the target gray level of the p-th sub-pixel 110 connected to S1 is equal to the target gray level of the j+1-th sub-pixel 110 connected to Si, then the controller 220 controls the third luminous brightness to be equal to the A luminous brightness.
  • the third luminous brightness is the luminous brightness of the light-emitting device 210 corresponding to the p-th sub-pixel 110 connected to S1.
  • the controller 220 controls the light-emitting device corresponding to the p-th sub-pixel 110 connected to S1
  • the luminous brightness of 210 is equal to the luminous brightness of the light-emitting device 210 corresponding to the j+1th sub-pixel 110 connected to Si when the j-th sub-pixel 110 connected to Si does not emit light.
  • the p-th sub-pixel 110 connected to the first data line 130 has the same color as the j+1-th sub-pixel 110 connected to the i-th data line 130.
  • the controller 220 controls the light-emitting device 210 corresponding to the first sub-pixel 110 connected in S1 (the first sub-pixel 110 located in the first row) to be equal to the brightness of the light-emitting device 210 when the first sub-pixel 110 connected in S5 does not emit light.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the second sub-pixel 110 connected to S1 (the first sub-pixel 110 located in the third row) to be equal to the brightness of the light-emitting device 210 when the first sub-pixel 110 connected to S5 does not emit light.
  • Embodiment 1 is further developed based on Embodiment 1. That is to say, for the above example, when the first sub-pixel 110 connected by S5 does not emit light, the controller 220 controls the light-emitting device 210 corresponding to the second sub-pixel 110 connected by S5 to have a higher lighting brightness than the first sub-pixel connected by S5. The light-emitting brightness of the light-emitting device 210 corresponding to the second sub-pixel 110 connected to S5 when 110 emits light.
  • the controller 220 controls the lighting brightness of the light-emitting device 210 corresponding to the first sub-pixel 110 and the second sub-pixel 110 connected by S1 to be equal to the second sub-pixel connected by S5 when the first sub-pixel 110 connected by S5 does not emit light.
  • 110 corresponds to the luminous brightness of the light-emitting device 210.
  • the M-th data line 130 (i.e., S10 ) is connected to the input of the corresponding switch circuit 120 with the M-1-th sub-pixel 110 located in the even rows (row 2 and row 4). end connection. It can be seen that when the display panel 10 displays a frame of image, if all the sub-pixels 110 connected to S10 are emitting light, then: before G2 outputs the scanning signal, the voltage in S10 is 0; when G2 outputs the scanning signal, S10 needs to output data.
  • the voltage in S10 needs to climb from 0 to 7V.
  • the display panel 10 displays a frame of image
  • the p-th sub-pixel 110 connected to S10 emits light
  • the data voltage written in the p-th sub-pixel 110 connected to S10 needs to rise from 0 to 7V.
  • the charge level of the p-th sub-pixel 110 connected to S10 is insufficient, which may cause the sub-pixel 110 to emit dark light.
  • p can be any positive integer.
  • the controller 220 works: if the target gray level of the p-th sub-pixel 110 connected to the M-th data line 130 is equal to the target gray level of the j+1-th sub-pixel 110 connected to the i-th data line 130, then The controller 220 controls the fourth lighting brightness to be equal to the first lighting brightness.
  • the fourth luminous brightness is the luminous brightness of the light-emitting device 210 corresponding to the p-th sub-pixel 110 connected to the M-th data line 130.
  • the controller 220 controls the M-th sub-pixel 110 connected to the i-th data line 130.
  • the luminous brightness of the light-emitting device 210 corresponding to the p-th sub-pixel 110 connected to the data line 130 is equal to the j+1-th sub-pixel 110 connected to the i-th data line 130 when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • the color of the p-th sub-pixel 110 connected to the M-th data line 130 is the same as the j+1-th sub-pixel 110 connected to the i-th data line 130.
  • the controller 220 controls the light-emitting device 210 corresponding to the first sub-pixel 110 connected to S10 (the 9th sub-pixel 110 located in the second row) to equal the brightness of the light-emitting device 210 when the first sub-pixel 110 connected to S7 does not emit light.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the second sub-pixel 110 connected to S10 (the 9th sub-pixel 110 located in the 4th row) to be equal to that of the first sub-pixel 110 connected to S7 when the first sub-pixel 110 connected to S7 does not emit light.
  • this embodiment is further developed based on Embodiment 1. That is to say, for the above example, when the first sub-pixel 110 connected by S7 does not emit light, the controller 220 controls the light-emitting device 210 corresponding to the second sub-pixel 110 connected by S7 to have a higher lighting brightness than the first sub-pixel connected by S7. The light-emitting brightness of the light-emitting device 210 corresponding to the second sub-pixel 110 connected to S7 when 110 emits light.
  • the controller 220 controls the lighting brightness of the light-emitting device 210 corresponding to the first sub-pixel 110 and the second sub-pixel 110 connected to S10 to be equal to the second sub-pixel connected to S7 when the first sub-pixel 110 connected to S7 does not emit light.
  • 110 corresponds to the luminous brightness of the light-emitting device 210.
  • the first data line 130 and the M-th data line 130 are increased in size.
  • the luminous brightness of the light-emitting device 210 corresponding to the connected sub-pixel 110 achieves the purpose of further improving the brightness uniformity of the display panel 10 .
  • the working principle of the backlight module 20 will be further explained below for the case where the first sub-pixel 110 connected to the i-th data line 130 emits dark light.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the voltage in Si is 0. Therefore, if G1 outputs a scanning signal and the first sub-pixel 110 connected to Si emits light, Si needs to output a data voltage (eg, 7V) to the first sub-pixel 110 connected to Si. In other words, when G1 outputs the scanning signal, the voltage in Si needs to climb from 0 to 7V. In this case, the charging capacity of the first sub-pixel 110 connected to Si may be insufficient, which may cause the sub-pixel 110 to emit dark light.
  • a data voltage eg, 7V
  • the controller 220 works: if the target gray level of the first sub-pixel 110 connected to Si is equal to the target gray level of the j+1 sub-pixel 110 connected to Si, then the controller 220 controls the first sub-pixel 110 connected to Si.
  • the light-emitting brightness of the light-emitting device 210 corresponding to the pixel 110 is equal to the light-emitting brightness of the light-emitting device 210 corresponding to the j+1-th sub-pixel 110 connected to Si when the j-th sub-pixel 110 connected to Si does not emit light.
  • the color of the first sub-pixel 110 connected to Si is the same as the j+1-th sub-pixel 110 connected to the i-th data line 130.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the first sub-pixel 110 of the S3 connection (that is, the third sub-pixel 110 located in the first row) to be equal to the S3 connection when the second sub-pixel 110 of the S3 connection does not emit light.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the first sub-pixel 110 of the S6 connection (that is, the third sub-pixel 110 located in the first row) to be equal to the S6 connection when the second sub-pixel 110 of the S6 connection does not emit light.
  • the light-emitting device 210 corresponding to the first sub-pixel 110 connected to the i-th data line 130 is increased.
  • the luminous brightness achieves the purpose of further improving the brightness uniformity of the display panel 10 .
  • An embodiment of the present application also provides a display device 30, including a display panel 10 and the backlight module 20 as in any of the above embodiments.
  • FIG. 6 is a schematic structural diagram of a display device provided in Embodiment 5 of the present application.
  • the display panel 10 includes a plurality of sub-pixels 110 and a plurality of data lines 130 .
  • Each data line 130 of the plurality of data lines 130 is connected to at least two sub-pixels 110 of the plurality of sub-pixels 110 .
  • the backlight module 20 includes a plurality of light-emitting devices 210 and a controller 220.
  • the multiple light-emitting devices 210 correspond to the multiple sub-pixels 110 one by one, so that the multiple light-emitting devices 210 provide light sources for the multiple sub-pixels 110 one by one.
  • the controller 220 uses To control the light emitting brightness of each light emitting device 210 among the plurality of light emitting devices 210 . For the j+1-th sub-pixel 110 connected to the i-th data line 130 among the M data lines 130 whose target gray level remains unchanged, the controller 220 does not emit light when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • i is an integer greater than 1 and less than M
  • j is a positive integer.
  • the backlight module 20 further includes a plurality of driving circuits 230 , and the plurality of driving circuits 230 correspond to the plurality of light-emitting devices 210 in one-to-one correspondence.
  • the first input terminal b of each driving circuit 230 in the plurality of driving circuits 230 is connected to the output terminal a of the power supply 32 , and the output terminal d of each driving circuit 230 in the plurality of driving circuits 230 is connected to the corresponding light-emitting device 210 connect.
  • the controller 220 is connected to the second input terminal e of each driving circuit 230 in the plurality of driving circuits 230.
  • the controller 220 controls the driving current output to the corresponding light emitting device 210 by each driving circuit 230 in the plurality of driving circuits 230. To control the light-emitting brightness of each light-emitting device 210 among the plurality of light-emitting devices 210 .
  • each of the plurality of driving circuits 230 includes a first transistor TFT1, a second transistor TFT2, and a capacitor C.
  • the input terminal of the first transistor TFT1 is connected to the output terminal a of the power supply 32
  • the output terminal of the first transistor TFT1 is connected to the light-emitting device 210 corresponding to the driving circuit 230
  • the control terminal of the first transistor TFT1 is connected to the output terminal of the second transistor TFT2 .
  • the first plate of the capacitor C is connected to the input terminal of the first transistor TFT1, and the second plate of the capacitor C is connected to the control terminal of the first transistor TFT1.
  • the input terminal of the second transistor TFT2 is connected to the controller 220.
  • the controller 220 controls the driving of each driving circuit 230 of the plurality of driving circuits 230 to output to the corresponding light emitting device 210 by controlling the voltage output to the input terminal of the second transistor TFT2. current.
  • the controller 220 stores a first correspondence relationship, and the first correspondence relationship is a correspondence relationship between the target gray level and the first voltage.
  • the controller 220 is configured to: when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the target gray level of the j+1-th sub-pixel 110 connected to the i-th data line 130 is obtained from the first corresponding relationship. The corresponding first voltage is obtained, and the voltage is input to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 according to the first voltage.
  • the controller 220 stores a second corresponding relationship.
  • the second corresponding relationship is the corresponding relationship between the target gray level and the second voltage, and the first voltage corresponding to any target gray level in the first corresponding relationship is greater than the corresponding first voltage in the second corresponding relationship.
  • the controller 220 is configured to: when the j-th sub-pixel 110 connected to the i-th data line 130 emits light, obtain the target grayscale of the j+1-th sub-pixel 110 connected to the i-th data line 130 from the second corresponding relationship.
  • the corresponding second voltage is input to the input end of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th sub-pixel 110 connected to the i-th data line 130 according to the second voltage.
  • the difference between the first voltage and the second voltage increases by 0.15 volts for each additional gray level.
  • the target gray level is greater than 8 and less than or equal to 20
  • the difference between the first voltage and the second voltage increases by 0.02 volts.
  • the target gray level is greater than 20 and less than or equal to 220
  • the difference between the first voltage and the second voltage increases by 0.01 volt.
  • the target gray level is greater than 220 and less than or equal to 225, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.02 volts.
  • the target gray level is greater than 225 and less than or equal to 238, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.03 volts.
  • the target gray level is greater than 238 and less than or equal to 244, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.04 volts.
  • the target gray level is greater than 244 and less than or equal to 247, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.05 volts.
  • the target gray level is greater than 247 and less than or equal to 255, for every additional gray level, the difference between the first voltage and the second voltage increases by 0.06 volts.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the p-th sub-pixel 110 connected to the first data line 130 to be equal to the i-th data line when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • the j+1th sub-pixel 110 is the same.
  • the controller 220 controls the light-emitting brightness of the light-emitting device 210 corresponding to the p-th sub-pixel 110 connected to the M-th data line 130 to be equal to the i-th data line when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • the j+1th sub-pixel 110 is the same.
  • each of the plurality of light-emitting devices 210 is one of a sub-millimeter light-emitting diode or a micro-light-emitting diode.
  • the backlight module 20 includes multiple light-emitting devices 210 and a controller 220.
  • the multiple light-emitting devices 210 provide light sources for the multiple sub-pixels 110 one by one.
  • the controller 220 is used to control the light emission of each light-emitting device 210. brightness.
  • the controller 220 does not emit light when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light.
  • the light emitting brightness of the light emitting device 210 corresponding to the j+1th sub-pixel 110 that is to say, for the multiple sub-pixels 110 connected to the i-th data line 130, if the data line 130 does not need to charge one of the sub-pixels 110, then when the next sub-pixel 110 emits light, the controller 220 will increase the charging voltage of the next sub-pixel 110.
  • the luminous brightness of the light-emitting device 210 corresponding to the pixel 110 enables the actual gray level of the next sub-pixel 110 to reach the target gray level, thereby improving the brightness uniformity of the display device 30 .
  • the sub-pixel 110 connected to the first data line 130 and the M-th data line 130 has a low luminous brightness
  • the sub-pixel 110 connected to the first data line 130 and the M-th data line 130 is enlarged.
  • the corresponding luminous brightness of the light-emitting device 210 achieves the purpose of further improving the brightness uniformity of the display device 30 .

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Abstract

本申请公开了一种背光模组及显示装置，属于显示技术领域。所述背光模组(20)包括多个发光器件(210)和控制器(220)。多个发光器件(210)一一为多个子像素(110)提供光源。控制器(220)用于控制每个发光器件(210)的发光亮度。背光模组(20)工作时，对于第i条数据线(130)连接的多个子像素(110)，若该数据线(130)不需要对其中一个子像素(110)充电，那么在下一个子像素(110)发光时，控制器(220)会提高下一子像素(110)对应的发光器件(210)的发光亮度。如此，可以每一子像素(110)的实际灰阶均达到其目标灰阶，进而提升显示面板(10)的亮度均一性。

Description

背光模组及显示装置
本申请要求于2022年04月19日在中华人民共和国国家知识产权局专利局提交的、申请号为202210410608.6、申请名称为“背光模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，特别涉及一种背光模组及显示装置。
背景技术
显示装置包括背光模组和显示面板。显示面板包括多条扫描线、多条数据线、多个子像素，以及与多个子像素一一对应的多个开关电路。背光模组用于为显示面板上的多个子像素提供光源。显示面板工作时，扫描线控制开关电路导通。数据线通过开关电路向对应的子像素中写入数据电压，对子像素进行充电，使对应的子像素发光。
相关技术中，显示装置在显示一帧图像的过程中，从第一条扫描线开始，多条扫描线逐条输出扫描信号，以控制多个子像素逐行发光。在此过程中，每一数据线输出的数据电压相对公共电压的极性保持不变。
然而，对于同一条数据线连接的多个子像素，若该数据线不需要对其中一个子像素充电，那么该数据线在对下一个子像素进行充电时，数据线中的电压就需要重新从零开始上升，这会导致下一子像素的充电量达不到发光所需的充电量，从而导致显示面板发光亮度不均。
技术问题
本申请实施例的目的之一在于：提供一种背光模组及显示装置，可以解决相关技术中显示面板发光亮度不均的问题。
技术解决方案
第一方面，提供了一种背光模组，应用于显示装置，所述显示装置包括显示面板，所述显示面板包括多个子像素和M条数据线，所述M条数据线中的每条数据线均与所述多个子像素中的至少两个子像素连接，所述M为大于3的整数；
所述背光模组包括多个发光器件和控制器，所述多个发光器件与所述多个子像素一一对应，以使所述多个发光器件一一为所述多个子像素提供光源，所述控制器用于控制所述多个发光器件中的每个发光器件的发光亮度；
所述控制器用于在所述M条数据线中的第i条数据线连接的第j+1个子像素的目标灰阶不变时，控制第一发光亮度大于第二发光亮度；所述第一发光亮度为所述第i条数据线连接的第j个子像素不发光时，所述第i条数据线连接的第j+1个子像素对应的发光器件的发光亮度；所述第二发光亮度为所述第i条数据线连接的第j个子像素发光时，所述第i条数据线连接的第j+1个子像素对应的发光器件的发光亮度，所述i为大于1且小于M的整数，所述j为正整数。
可选地，所述背光模组还包括多个驱动电路，所述多个驱动电路与所述多个发光器件一一对应，所述多个驱动电路中的每个驱动电路的第一输入端均与电源的输出端连接，所述多个驱动电路中的每个驱动电路的输出端与对应的发光器件连接；
所述控制器与所述多个驱动电路中的每个驱动电路的第二输入端连接，所述控制器用于控制所述每个驱动电路输出至对应发光器件的驱动电流，以控制所述多个发光器件中的每个发光器件的发光亮度。
可选地，所述多个驱动电路中的每个驱动电路均包括第一晶体管、第二晶体管和电容；
所述第一晶体管的输入端与所述电源的输出端连接，所述第一晶体管的输出端与所述驱动电路对应 的发光器件连接，所述第一晶体管的控制端与所述第二晶体管的输出端连接；
所述电容的第一极板与所述第一晶体管的输入端连接，所述电容的第二极板与所述第一晶体管的控制端连接；
所述第二晶体管的输入端与所述控制器连接，所述控制器通过控制输出至所述第二晶体管的输入端的电压来控制所述每个驱动电路输出至对应发光器件的驱动电流。
可选地，所述控制器存储有第一对应关系，所述第一对应关系为目标灰阶与第一电压之间的对应关系；所述控制器用于：在所述第i条数据线连接的第j个子像素不发光时，根据所述第i条数据线连接的第j+1个子像素的目标灰阶从所述第一对应关系中获取对应的第一电压，并根据所述第一电压向所述第i条数据线连接的第j+1个子像素对应的驱动电路的第二晶体管的输入端输入电压；
所述控制器存储有第二对应关系，所述第二对应关系为目标灰阶与第二电压之间的对应关系，且任一目标灰阶在所述第一对应关系中对应的第一电压大于在所述第二对应关系中对应的第二电压；所述控制器用于：在所述第i条数据线连接的第j个子像素发光时，根据所述第i条数据线连接的第j+1个子像素的目标灰阶从所述第二对应关系中获取对应的第二电压，并根据所述第二电压向所述第i条数据线连接的第j+1个子像素对应的驱动电路的第二晶体管的输入端输入电压。
可选地，所述目标灰阶大于或等于0，且小于或等于8时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.15伏；所述目标灰阶大于8，且小于或等于20时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.02伏；所述目标灰阶大于20，且小于或等于220时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.01伏；所述目标灰阶大于220，且小于或等于225时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.02伏；所述目标灰阶大于225，且小于或等于238时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.03伏；所述目标灰阶大于238，且小于或等于244时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.04伏；所述目标灰阶大于244，且小于或等于247时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.05伏；所述目标灰阶大于247，且小于或等于255时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.06伏。
可选地，若所述M条数据线中的第1条数据线连接的第p个子像素的目标灰阶等于所述第i条数据线连接的第j+1个子像素的目标灰阶，则所述控制器控制第三发光亮度等于所述第一发光亮度；所述第三发光亮度为所述第1条数据线连接的第p个子像素对应的发光器件的发光亮度；其中，所述p为正整数，所述第1条数据线连接的第p个子像素的颜色与所述第i条数据线连接的第j+1个子像素相同。
可选地，若所述M条数据线中的第M条数据线连接的第p个子像素的目标灰阶等于所述第i条数据线连接的第j+1个子像素的目标灰阶，则所述控制器控制第四发光亮度等于所述第一发光亮度；所述第四发光亮度为所述第M条数据线连接的第p个子像素对应的发光器件的发光亮度；其中，所述p为正整数，所述第M条数据线连接的第p个子像素的颜色与所述第i条数据线连接的第j+1个子像素相同。
可选地，所述多个发光器件中的每个发光器件均为次毫米发光二极管、微发光二极管中的一个。
第二方面，提供了一种显示装置，包括显示面板和如第一方面任意一项所述的背光模组；
所述显示面板包括多个子像素和M条数据线，所述M条数据线中的每条数据线均与所述多个子像素中的至少两个子像素连接，所述M为大于3的整数。
可选地，所述多个子像素呈N行M-1列排布，所述j为小于或等于N-1的正整数；
所述M条数据线中的第1条数据线与奇数行的第1个子像素连接，所述M条数据线中的第M条数据线与偶数行的第M-1个子像素连接，所述第i条数据线与奇数行的第i个子像素及偶数行的第i-1个子像素连接。
可以理解的是，上述第二方面的有益效果可以参见上述第一方面中的相关描述，在此不再赘述。
有益效果
在本申请中，背光模组包括多个发光器件和控制器，多个发光器件一一为多个子像素提供光源，控制器用于控制每个发光器件的发光亮度。背光模组工作时，对于目标灰阶不变的第i条数据线连接的第j+1个子像素，控制器控制第一发光亮度大于第二发光亮度。其中，第一发光亮度为第i条数据线连接的第j个子像素不发光时，第i条数据线连接的第j+1个子像素对应的发光器件的发光亮度。第二发光亮度为第i条数据线连接的第j个子像素发光时，第i条数据线连接的第j+1个子像素对应的发光器件的发光亮度。也就是说，对于第i条数据线连接的多个子像素，若该数据线不需要对其中一个子像素充电，那么在下一个子像素发光时，控制器会提高下一子像素对应的发光器件的发光亮度，从而使下一子像素的实际灰阶达到目标灰阶，进而提升显示面板的亮度均一性。
附图说明
为了更清楚地说明本申请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申请的一些实施例，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是本申请实施例一提供的一种显示面板的结构示意图；
图2是本申请实施例一提供的一种显示装置的第一视角的结构示意图；
图3是本申请实施例一提供的一种显示装置的第二视角的结构示意图；
图4是本申请实施例二提供的一种背光模组的电路结构示意图；
图5是本申请实施例二提供的一种驱动电路的电路结构图；
图6是本申请实施例五提供的一种显示装置的结构示意图。
其中，各附图标号所代表的含义分别为：
10、显示面板；
110、子像素；
120、开关电路；
130、数据线；
140、扫描线；
20、背光模组；
210、发光器件；
220、控制器；
230、驱动电路；
30、显示装置；
32、电源。
本申请的实施方式
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。
应当理解的是，本申请提及的“多个”是指两个或两个以上。在本申请的描述中，除非另有说明，“/”表示或的意思，比如，A/B可以表示A或B；本文中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，比如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，为了便于清楚描述本申请的技术方案，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数 量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
下面结合显示面板的结构，对本申请实施例提供的背光模组的工作原理进行详细地解释说明：
背光模组应用于显示装置。除背光模组外，显示装置还包括显示面板。显示面板包括多个子像素、多个开关电路、多条扫描线和多条数据线。其中，开关电路的个数与子像素的个数相等。多个开关电路与多个子像素一一对应连接。每个开关电路均具有输入端、输出端和控制端。开关电路的控制端用于控制开关电路的输入端和输出端之间的导通与断开。多个开关电路中的每个开关电路的输入端均与一条数据线连接，每个开关电路的控制端均与一条扫描线连接，每个开关电路的输出端均与对应的子像素连接。如此，当扫描线输出扫描信号时，与该扫描线连接的所有开关电路导通。开关电路导通时，数据线中的数据电压可以通过开关电路输出至该开关电路所连接的子像素。一般地，每个子像素可以包括像素电极，还可以包括位于像素电极上的色阻。像素电极用于与公共电极形成电压差。像素电极与公共电极之间具有液晶，当像素电极与公共电极之间具有电压差时，像素电极与公共电极之间形成电场，液晶在该电场的作用下旋转，从而使背光源发出的光线可以穿过子像素，达到发光显示目的。一般地，公共电极的电压是固定的，数据线中的数据电压用于输出至像素电极。连接至同一数据线的多个开关电路所连接的扫描线不同，从而使每个子像素可以单独输入数据电压。
图1是本申请提供的一种显示面板10的结构示意图。如图1所示，显示面板10包括36个子像素110、36个开关电路120、4条扫描线140和10条数据线130。其中，36个子像素110呈4行9列排列，且36个子像素110包括12个R(Red，红色)子像素、12个G(Green，绿色)子像素和12个B(Blue，蓝色)子像素。开关电路120与子像素110一一对应，每个开关电路120的输出端与对应的子像素110连接。为便于描述，将10条数据线130分别称为S1、S2……S10。4条扫描线140分别称为G1、G2、G3和G4。每条数据线130沿列方向延伸，每条扫描线140沿行方向延伸。位于第一行的子像素110对应的开关电路120的控制端均与G1连接，位于第二行的子像素110对应的开关电路120的控制端均与G2连接……S1与位于奇数行(第1行和第3行)的第一个子像素110对应的开关电路120的输入端连接，S10与位于偶数行(第2行和第4行)的第9个子像素110对应的开关电路120的输入端连接。在S1和S10之间，Si(即沿纸面从左向右方向的第i条数据线130，i为大于1且小于10的整数，如i等于2、3、4或9)与位于奇数行的第i个子像素110对应的开关电路120的输入端及位于偶数行的第i-1个子像素110对应的开关电路120的输入端连接。
显示面板10显示一帧图像时，G1、G2、G3和G4依次输出扫描信号。G1输出扫描信号时，位于第一行的子像素110对应的开关电路120全部导通。此时，S1至S9输出数据电压，即可对位于第一行的所有子像素110充电，从而使位于第一行的所有子像素110发光。G2输出扫描信号时，位于第二行的子像素110对应的开关电路120全部导通。此时，S2至S10输出数据电压，即可对位于第二行的所有子像素110充电，从而使位于第二行的所有子像素110发光……G4输出扫描信号时，位于第四行的子像素110对应的开关电路120全部导通。此时，S2至S10输出数据电压，即可对位于第四行的所有子像素110充电，从而使位于第四行的所有子像素110发光。在显示一帧图像的过程中，每一数据线130输出的数据电压相对公共电压的极性保持不变。而在显示下一帧图像的过程中，每一数据线130输出的数据电压相对公共电压的极性可以发生变化。以公共电压为0V、显示面板10用于显示纯色图像(每一子像素110的灰阶相同)为例，在显示第一帧图像时，S1输出的数据电压可以恒等于7V，S2输出的数据电压可以恒等于-7V，S3输出的数据电压可以恒等于7V……S10输出的数据电压可以恒等于-7V。在显示第二帧图像时，S1输出的数据电压可以恒等于-7V，S2输出的数据电压可以恒等于7V，S3输出的数据电压可以恒等于-7V……S10输出的数据电压可以恒等于7V。
然而，在一些特定的应用环境中，显示面板10中的部分子像素110是不发光的，即数据线130不需要对部分子像素110充电。例如，在显示面板10用于显示蓝绿画面时，显示面板10中所有的R子像素均不发光。以S3连接的4个子像素110和S5连接的4个子像素110为例，G1输出扫描信号时，S3需要输出数据电压(如7V)至位于第1行的第3个子像素110，即B子像素。在G2输出扫描信号时，S3需要输出数据电压(如7V)至位于第2行的第2个子像素110，即G子像素。也就是说，在G1和G2依次输出扫描信号时，S3内的电压始终为7V。换句话说，在此过程中，位于第2行的第2个子像素110所写入的数据电压不需要从0攀升至7V。G2输出扫描信号时，S5不需要输出数据电压至位于第2行的第4个子像素110，即R子像素，此时S5内的电压为0。在G3输出扫描信号时，S5需要输出数据电压(如7V)至位于第3行的第5个子像素110，即G子像素。也就是说，在G3输出扫描信号的过程中，S5内的电压需要从0攀升至7V。换句话说，在此过程中，位于第3行的第5个子像素110所写入的数据电压需要从0攀升至7V。这种情况下，位于第3行的第5个子像素110的充电量必然低于同颜色的位于第2行的第2个子像素110。同样的原理拓展至整个显示面板10，可以得出：S2连接的位于第3行的第2个子像素110、S5连接的位于第3行的第5个子像素110和S8连接的位于第3行的第8个子像素110的充电量都低于S3、S6和S9连接的G子像素的充电量。且，S4连接的位于第2行的第3个子像素110、S4连接的位于第4行的第3个子像素110、S7连接的位于第2行的第6个子像素110和S7连接的位于第4行的第6个子像素110的充电量都低于S3连接的位于第3行的3个子像素110和S6连接的位于第3行的3个子像素110的充电量。一般地，对于背光亮度相同的两个同颜色的子像素110，子像素110的充电量越高，则该子像素110的发光亮度越高。
图2是本申请实施例一提供的一种显示装置30的第一视角的结构示意图(图中未示出数据线)；图3是本申请实施例一提供的一种显示装置30的第二视角的结构示意图(图中未示出数据线和除G1外的其他扫描线)。其中，第一视角和第二视角为两个不同的视角。如图2和图3所示，显示装置30包括背光模组20和如上述的显示面板10。背光模组20包括多个发光器件210和控制器220(图中未示出)。发光器件210的个数与显示面板10中子像素110的个数相等。多个发光器件210与多个子像素110一一对应，从而使每个发光器件210为且仅为一个子像素110提供光源。控制器220可以与多个发光器件210连接，以控制每个发光器件210的发光亮度。其中，对于目标灰阶不变的M条数据线130中的第i条数据线130连接的第j+1个子像素110，控制器220控制第一发光亮度大于第二发光亮度。其中，第一发光亮度为第i条数据线130连接的第j个子像素110不发光时，第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度。第二发光亮度为第i条数据线130连接的第j个子像素110发光时，第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度。也就是说，对于第i条数据线130，若第i条数据线130不需要向某一子像素110充电，那么在第i条数据线130对下一子像素110充电时，控制器220会提高下一子像素110对应的发光器件210的亮度。这里的第i条数据线130连接的第j个子像素110和第j+1个子像素110是依沿纸面从上向下的顺序而言的。可以理解的是，在图1所示的实施例中，M等于10。在其他一些未示出的实施例中，M可以是任意一个大于2的整数，如M等于10、13或7等。在一些具体的实施例中，M等于5761。i为大于1且小于M的整数，j为正整数。
具体来说，显示装置30工作时，显示面板10的子像素110中的像素电极与公共电极之间形成电场，液晶在该电场的作用下旋转，从而使发光器件210发出的光线可以穿过对应的子像素110。而在M条数据线130中，当第i条数据线130不需要对第j个子像素110充电，且需要对第j+1个子像素110充电时(即第i条数据线130连接的第j个子像素110不发光，且第i条数据线130连接的第j+1个子像素110发光时)，第j+1个子像素110的充电量就会达不到发光所需的充电量，即像素电极的电压达不到 发光所需的电压，会导致液晶旋转角度偏小，从而导致第j+1个子像素110发光亮度较暗。基于此，在第i条数据线130连接的第j个子像素110不发光时，提高第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度，即可提升第i条数据线130连接的第j+1个子像素110的发光亮度，从而使第i条数据线130连接的第j+1个子像素110的实际灰阶达到目标灰阶，进而提升显示面板10的亮度均一性。其中，目标灰阶用于表征子像素110的目标亮度，实际灰阶用于表征子像素110的实际亮度。
下面对控制器220控制发光器件210的发光亮度的实现方式予以说明。
实施例二：
图4是本申请实施例二提供的一种背光模组20的电路结构示意图。如图4所示，背光模组20还包括多个驱动电路230。
具体来说，驱动电路230的个数与发光器件210的个数相同。多个驱动电路230与多个发光器件210一一对应，以使每个驱动电路230用于且仅用于驱动一个发光器件210发光。多个驱动电路230中，每个驱动电路230均具有第一输入端b、第二输入端e和输出端d。其中，每个驱动电路230的第一输入端b与电源32的输出端a连接，每个驱动电路230的输出端d与对应的发光器件210连接。每个驱动电路230的第二输入端e都与控制器220连接，如此，控制器220工作时，可以通过控制每个驱动电路230输出至对应发光器件210的驱动电流来控制每个发光器件210的发光亮度。一般地，驱动电路230输出至对应发光器件210的驱动电流越大，则对应发光器件210的亮度越高。因此，在这一实施例中，控制器220的工作过程也可以描述为：对于目标灰阶不变的第i条数据线130连接的第j+1个子像素110，控制器220在第i条数据线130连接的第j个子像素110不发光时，控制第i条数据线130连接的第j+1个子像素110对应的发光器件210所对应的驱动电路230输出的驱动电流大于第i条数据线130连接的第j个子像素110发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210所对应的驱动电路230输出的驱动电流。也就是说，在第i条数据线130连接的第j个子像素110不发光时，提高第i条数据线130连接的第j+1个子像素110对应的发光器件210所对应的驱动电路230输出的驱动电流。如此，可以提升第i条数据线130连接的第j+1个子像素110的发光亮度，从而使第i条数据线130连接的第j+1个子像素110的实际灰阶达到目标灰阶，进而提升显示面板10的亮度均一性。
图5是本申请实施例二提供的一种驱动电路230的电路结构图。如图5所示，驱动电路230可以包括第一晶体管TFT1、第二晶体管TFT2和电容C。这里的第一晶体管TFT1和第二晶体管TFT2均可以是薄膜晶体管(thin film transistor，TFT)。其中，第一晶体管TFT1的输入端与电源32的输出端a连接。也就是说，第一晶体管TFT1的输入端即为驱动电路230的第一输入端b。第一晶体管TFT1的输出端与驱动电路230对应的发光器件210连接。也就是说，第一晶体管TFT1的输出端即为驱动电路230的输出端d。第一晶体管TFT1的控制端与第二晶体管TFT2的输出端连接。电容C连接于第一晶体管TFT1的控制端与输出端之间。换句话说，电容C的第一极板与第一晶体管TFT1的输入端连接，电容C的第二极板与第一晶体管TFT1的控制端连接。第二晶体管TFT2的输入端与控制器220连接。也就是说，第二晶体管TFT2的输入端即为驱动电路230的第二输入端e。第二晶体管TFT2的控制端用于输入SCAN1信号。在一些具体的实施例中，发光器件210为次毫米发光二极管(miniLED)、微发光二极管(microLED)的一种。其中，miniLED是指尺寸在100微米至200微米之间的发光二极管，microLED则是指尺寸在100微米以下的发光二极管。发光器件210的阳极可以与第一晶体管TFT1的输出端连接，发光器件210的阴极可以与公共接地端VSS连接。
以一个发光器件210对应的驱动电路230为例，对其工作过程进行描述：在第一时间段，第二晶 体管TFT2的控制端输入SCAN1信号，使第二晶体管TFT2导通。同时，控制器220输出电压。控制器220输出的电压可以写入电容C内，从而被电容C存储。在第一时间段之后的第二时间段，第二晶体管TFT2的控制端不再输入SCAN1信号，第二晶体管TFT2关断。此时，电容C向第一晶体管TFT1的控制端放电，使第一晶体管TFT1导通。第一晶体管TFT1导通时，电源32的输出端a、第一晶体管TFT1、发光器件210与公共接地端之间形成通路，从而使发光器件210内有电流流过，发光器件210发光。其中，发光器件210的发光亮度取决于第一晶体管TFT1的输出电流，而第一晶体管TFT1的输出电流则取决于电容C的电压，即取决于控制器220输出至电容C的电压。如此，控制器220工作时，通过控制输出至每个驱动电路230的第二晶体管TFT2的输入端的电压大小，即可控制每个驱动电路230输出至对应发光器件210的驱动电流的大小，进而控制每个发光器件210的发光亮度。
在一个具体的实施例中，控制器220存储有第一对应关系。第一对应关系为目标灰阶与第一电压之间的对应关系。例如，第一对应关系可以如下表1所示：
表1
目标灰阶 000 001 002 003 004 005 006 007
第一电压(V) V0 V1 V2 V3 V4 V5 V6 V7
目标灰阶 008 009 010 011 012 013 014 015
第一电压(V) V8 V9 V10 V11 V12 V13 V14 V15
目标灰阶 016 017 018 …… 252 253 254 255
第一电压(V) V16 V17 V18 …… V252 V253 V254 V255
第一对应关系应用于第i条数据线130连接的第j个子像素110不发光的情况。也就是说，在第i条数据线130连接的第j个子像素110不发光时，控制器220根据第i条数据线130连接的第j+1个子像素110的目标灰阶，从第一对应关系中获取对应的第一电压，并根据第一电压向第i条数据线130连接的第j+1个子像素110对应的驱动电路230的第二晶体管TFT2的输入端输入电压。
以图1所示的显示面板10为例，当所有的R子像素不发光时，i可以等于5，j可以等于2。也就是说，第5条数据线130连接的第2个子像素110(即S5连接的位于第2行的第4个子像素110)不发光。这种情况下，在G3输出扫描信号，S5连接的第3个子像素110(即位于第3行的第5个子像素110)发光时，控制器220根据S5连接的第3个子像素110的目标灰阶从第一对应关系中获取对应的第一电压。例如，当S5连接的第3个子像素110的目标灰阶为016时，控制器220获取到的第一电压为V16伏。此时，控制器220可以输出电压大小为V16伏的电压至S5连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端。
当所有的R子像素不发光时，i也可以等于8，j等于2。也就是说，第8条数据线130连接的第2个子像素110(即S8连接的位于第2行的第7个子像素110)不发光。这种情况下，在G3输出扫描信号，S8连接的第3个子像素110(即位于第3行的第8个子像素110)发光时，控制器220根据S8连接的第3个子像素110的目标灰阶从第一对应关系中获取对应的第一电压。例如，当S8连接的第3个子像素110的目标灰阶为007时，控制器220获取到的第一电压为V7伏。此时，控制器220可以输出电压大小为V7伏的电压至S8连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端。
控制器220内还存储有第二对应关系。第二对应关系为目标灰阶与第二电压之间的对应关系。例如，第二对应关系可以如下表2所示：
表2
目标灰阶 000 001 002 003 004 005
第二电压(V) V0-0.15 V1-0.3 V2-0.45 V3-0.6 V4-0.75 V5-0.9
目标灰阶 006 007 008 009 010 011
第二电压(V) V6-1.05 V7-1.2 V8-1.35 V9-1.37 V10-1.39 V11-1.41
目标灰阶 012 013 014 015 016 ……
第二电压(V) V12-1.43 V13-1.45 V14-1.47 V15-1.49 V16-1.51 ……
第二对应关系应用于第i条数据线130连接的第j个子像素110发光的情况。也就是说，在第i条数据线130连接的第j个子像素110发光时，控制器220根据第i条数据线130连接的第j+1个子像素110的目标灰阶，从第二对应关系中获取对应的第二电压，并根据第二电压向第i条数据线130连接的第j+1个子像素110对应的驱动电路230的第二晶体管TFT2的输入端输入电压。
依旧以“i可以等于5，j可以等于2”为例，也就是说，第5条数据线130连接的第2个子像素110(即S5连接的位于第2行的第4个子像素110)发光。这种情况下，在G3输出扫描信号，S5连接的第3个子像素110(即位于第3行的第5个子像素110)发光时，控制器220根据S5连接的第3个子像素110的目标灰阶从第二对应关系中获取对应的第二电压。例如，当S5连接的第3个子像素110的目标灰阶为016时，控制器220获取到的第二电压为V16-1.51伏。此时，控制器220可以输出电压大小为V16-1.51伏的电压至S5连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端。由此可以看出，对于目标灰阶为016的S5连接的第3个子像素110，相比于S5连接的第2个子像素110发光的情况，S5连接的第2个子像素110不发光时，控制器220输出至S5连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端的电压增大了1.51伏。如此，可以在S5连接的第3个子像素110的充电量不足的情况下，保证该子像素110的实际灰阶达到目标灰阶，从而提升显示面板10的亮度均一性。
同样以“i也可以等于8，j等于2”为例，也就是说，第8条数据线130连接的第2个子像素110(即S8连接的位于第2行的第7个子像素110)发光。这种情况下，在G3输出扫描信号，S8连接的第3个子像素110(即位于第3行的第8个子像素110)发光时，控制器220根据S8连接的第3个子像素110的目标灰阶从第二对应关系中获取对应的第二电压。例如，当S8连接的第3个子像素110的目标灰阶为007时，控制器220获取到的第二电压为V7-1.2伏。此时，控制器220可以输出电压大小为V7-1.2伏的电压至S8连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端。由此可以看出，对于目标灰阶为007的S8连接的第3个子像素110，相比于S8连接的第2个子像素110发光的情况，S8连接的第2个子像素110不发光时，控制器220输出至S8连接的第3个子像素110对应的驱动电路230的第二晶体管TFT2的输入端的电压增大了1.2伏。如此，可以在S8连接的第3个子像素110的充电量不足的情况下，保证该子像素110的实际灰阶达到目标灰阶，从而提升显示面板10的亮度均一性。
在一些具体的实施例中，如上表1及表2所示，目标灰阶大于或等于0，且小于或等于8时，每增加1灰阶，第一电压与第二电压的差值增加0.15伏。目标灰阶大于8，且小于或等于20时，每增加1灰阶，第一电压与第二电压的差值增加0.02伏。目标灰阶大于20，且小于或等于220时，每增加1灰阶，第一电压与第二电压的差值增加0.01伏。目标灰阶大于220，且小于或等于225时，每增加1灰阶，第一电压与第二电压的差值增加0.02伏。目标灰阶大于225，且小于或等于238时，每增加1灰阶，第一电压与第二电压的差值增加0.03伏。目标灰阶大于238，且小于或等于244时，每增加1灰阶，第一电压与第二电压的差值增加0.04伏。目标灰阶大于244，且小于或等于247时，每增加1灰阶，第一电压与第二电压的差值增加0.05伏。目标灰阶大于247，且小于或等于255时，每增加1灰阶，第一电压 与第二电压的差值增加0.06伏。
在一些具体的实施例中，控制器220内可以针对R子像素、G子像素和B子像素分别设有第一对应关系和第二对应关系。这种情况下，若第i条数据线130连接的第j个子像素110不发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为R子像素，则控制器220从R子像素对应的第一关系中获取对应的第一电压。若第i条数据线130连接的第j个子像素110发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为R子像素，则控制器220从R子像素对应的第二关系中获取对应的第二电压。若第i条数据线130连接的第j个子像素110不发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为G子像素，则控制器220从G子像素对应的第一关系中获取对应的第一电压。若第i条数据线130连接的第j个子像素110发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为G子像素，则控制器220从G子像素对应的第二关系中获取对应的第二电压。若第i条数据线130连接的第j个子像素110不发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为B子像素，则控制器220从B子像素对应的第一关系中获取对应的第一电压。若第i条数据线130连接的第j个子像素110发光，第i条数据线130连接的第j+1个子像素110发光，且第i条数据线130连接的第j+1个子像素110为B子像素，则控制器220从B子像素对应的第二关系中获取对应的第二电压。
在另一些具体的实施例中，控制器220内也可以仅设有一个第一对应关系和一个第二对应关系。这种情况下，若第i条数据线130连接的第j个子像素110不发光，且第i条数据线130连接的第j+1个子像素110发光，则控制器220从第一关系中获取对应的第一电压。若第i条数据线130连接的第j个子像素110发光，且第i条数据线130连接的第j+1个子像素110发光，则控制器220从第二关系中获取对应的第二电压。在这一具体的实施例中，不再区分每一子像素110的颜色。
在其他一些未示出的实施例中，与图5所示的实施例并列的，驱动电路230中还具有可变电阻。控制器220与每个驱动电路230中的可变电阻连接。控制器220工作时，可以控制每个驱动电路230中的可变电阻的阻值大小，从而每个驱动电路230输出至对应发光器件210的驱动电流的大小，进而控制每个发光器件210的发光亮度。例如，当需要增大某一发光器件210的发光亮度时，控制器220可以控制该发光器件210对应的驱动电路230中可变电阻的阻值减小；反之，当需要减小某一发光器件210的发光亮度时，控制器220可以控制该发光器件210对应的驱动电路230中可变电阻的阻值增大。不再赘述。
在上述实施例中，已经针对第i条数据线130连接的第j个子像素110不发光时、第i条数据线130连接的第j+1个子像素110充电量不足的情况，增大了第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度，达到了提升显示面板10的亮度均一性的目的。其中，i为大于1且小于M的整数。j为正整数。
下面针对第1条数据线130和第M条数据线130连接的子像素110发光亮度较暗的情况，对背光模组20的工作原理进行进一步地解释说明。
实施例三：
针对第1条数据线130：
依旧参见图1所示的显示面板10，第1条数据线130(即S1)与位于奇数行(第1行和第3行)的第一个子像素110对应的开关电路120的输入端连接。由此可见，显示面板10显示一帧图像时，若S1连接的所有子像素110均发光，则：G1输出扫描信号之前，S1中的电压为0；在G1输出扫描信号 时，S1需要输出数据电压(如7V)至位于第1行的第1个子像素110；在G2输出扫描信号时，S1不需要输出数据电压；在G3输出扫描信号时，S1需要输出数据电压(如7V)至位于第3行的第1个子像素110。也就是说，在G1和G3输出扫描信号的过程中，S1内的电压需要从0攀升至7V。换句话说，显示面板10显示一帧图像时，若与S1连接的第p个子像素110发光，则与S1连接的第p个子像素110所写入的数据电压均需要从0攀升至7V。这种情况下，与S1连接的第p个子像素110的充电量不足，可能会导致子像素110发光亮度偏暗。其中，p可以为任意一个正整数。
基于上述情况，控制器220工作时：若S1连接的第p个子像素110的目标灰阶等于Si连接的第j+1个子像素110的目标灰阶，则控制器220控制第三发光亮度等于第一发光亮度。其中，第三发光亮度为S1连接的第p个子像素110对应的发光器件210的发光亮度。也就是说，若S1连接的第p个子像素110的目标灰阶等于Si连接的第j+1个子像素110的目标灰阶，则控制器220控制S1连接的第p个子像素110对应的发光器件210的发光亮度等于Si连接的第j个子像素110不发光时Si连接的第j+1个子像素110对应的发光器件210的发光亮度。其中，第1条数据线130连接的第p个子像素110的颜色与第i条数据线130连接的第j+1个子像素110相同。
举例来说，以图1所示的显示面板10为例，假设其中所有的子像素110均发光，且每一子像素110的目标灰阶均相等，即显示面板10显示纯色图像。此时：控制器220控制S1连接的第1个子像素110(位于第1行的第1个子像素110)对应的发光器件210的发光亮度等于S5连接的第1个子像素110不发光时S5连接的第2个子像素110对应的发光器件210的发光亮度。同样的，控制器220控制S1连接的第2个子像素110(位于第3行的第1个子像素110)对应的发光器件210的发光亮度等于S5连接的第1个子像素110不发光时S5连接的第2个子像素110对应的发光器件210的发光亮度。
需要注意的是，这一实施例在实施例一的基础上进一步拓展得到的。也就是说，对于上述举例，控制器220在S5连接的第1个子像素110不发光时，控制S5连接的第2个子像素110对应的发光器件210的发光亮度高于S5连接的第1个子像素110发光时S5连接的第2个子像素110对应的发光器件210的发光亮度。在此基础上，控制器220控制S1连接的第1个子像素110和第2个子像素110对应的发光器件210的发光亮度等于S5连接的第1个子像素110不发光时S5连接的第2个子像素110对应的发光器件210的发光亮度。
针对第M条数据线130：
依旧参见图1所示的显示面板10，第M条数据线130(即S10)与位于偶数行(第2行和第4行)的第M-1个子像素110连接对应的开关电路120的输入端连接。由此可见，显示面板10显示一帧图像时，若S10连接的所有子像素110均发光，则：G2输出扫描信号之前，S10中的电压为0；在G2输出扫描信号时，S10需要输出数据电压(如7V)至位于第2行的第9个子像素110；在G3输出扫描信号时，S10不需要输出数据电压；在G4输出扫描信号时，S10需要输出数据电压(如7V)至位于第4行的第9个子像素110。也就是说，在G2和G4输出扫描信号的过程中，S10内的电压需要从0攀升至7V。换句话说，显示面板10显示一帧图像时，若与S10连接的第p个子像素110发光，则与S10连接的第p个子像素110所写入的数据电压均需要从0攀升至7V。这种情况下，与S10连接的第p个子像素110的充电量不足，可能会导致子像素110发光亮度偏暗。其中，p可以为任意一个正整数。
基于上述情况，控制器220工作时：若第M条数据线130连接的第p个子像素110的目标灰阶等于第i条数据线130连接的第j+1个子像素110的目标灰阶，则控制器220控制第四发光亮度等于第一发光亮度。其中，第四发光亮度为第M条数据线130连接的第p个子像素110对应的发光器件210的发光亮度。也就是说，若M条数据线130连接的第p个子像素110的目标灰阶等于第i条数据线130连接的第j+1个子像素110的目标灰阶，则控制器220控制第M条数据线130连接的第p个子像素110对 应的发光器件210的发光亮度等于第i条数据线130连接的第j个子像素110不发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度。其中，第M条数据线130连接的第p个子像素110的颜色与第i条数据线130连接的第j+1个子像素110相同。
举例来说，以图1所示的显示面板10为例，假设其中所有的子像素110均发光，且每一子像素110的目标灰阶均相等，即显示面板10显示纯色图像。此时：控制器220控制S10连接的第1个子像素110(位于第2行的第9个子像素110)对应的发光器件210的发光亮度等于S7连接的第1个子像素110不发光时S7连接的第2个子像素110对应的发光器件210的发光亮度。同样的，控制器220控制S10连接的第2个子像素110(位于第4行的第9个子像素110)对应的发光器件210的发光亮度等于S7连接的第1个子像素110不发光时S7连接的第2个子像素110对应的发光器件210的发光亮度。
同样的，这一实施例是在实施例一的基础上进一步拓展得到的。也就是说，对于上述举例，控制器220在S7连接的第1个子像素110不发光时，控制S7连接的第2个子像素110对应的发光器件210的发光亮度高于S7连接的第1个子像素110发光时S7连接的第2个子像素110对应的发光器件210的发光亮度。在此基础上，控制器220控制S10连接的第1个子像素110和第2个子像素110对应的发光器件210的发光亮度等于S7连接的第1个子像素110不发光时S7连接的第2个子像素110对应的发光器件210的发光亮度。
在这一实施例中，还针对第1条数据线130和第M条数据线130连接的子像素110发光亮度较暗的情况，增大了第1条数据线130和第M条数据线130连接的子像素110对应的发光器件210的发光亮度，达到了进一步提升显示面板10的亮度均一性的目的。
下面针对第i条数据线130连接的第1个子像素110发光亮度较暗的情况，对背光模组20的工作原理进行进一步地解释说明。
实施例四：
依旧参见图1所示的显示面板10，G1输出扫描信号之前，Si中的电压为0。因此，若G1输出扫描信号、且Si连接的第一个子像素110发光时，Si需要输出数据电压(如7V)至Si所连接的第1个子像素110。也就是说，在G1输出扫描信号时，Si内的电压需要从0攀升至7V。这种情况下，与Si连接的第1个子像素110的充电量不足，可能会导致子像素110发光亮度偏暗。
基于上述情况，控制器220工作时：若Si连接的第1个子像素110的目标灰阶等于Si连接的第j+1个子像素110的目标灰阶，则控制器220控制Si连接的第1个子像素110对应的发光器件210的发光亮度等于Si连接的第j个子像素110不发光时Si连接的第j+1个子像素110对应的发光器件210的发光亮度。其中，Si连接的第1个子像素110的颜色与第i条数据线130连接的第j+1个子像素110相同。
举例来说，以图1所示的显示面板10为例，假设其中所有的子像素110均发光，且每一子像素110的目标灰阶均相等，即显示面板10显示纯色图像。此时：控制器220控制S3连接的第1个子像素110(即位于第1行的第3个子像素110)对应的发光器件210的发光亮度等于S3连接的第2个子像素110不发光时S3连接的第3个子像素110对应的发光器件210的发光亮度。同样的，控制器220控制S6连接的第1个子像素110(即位于第1行的第3个子像素110)对应的发光器件210的发光亮度等于S6连接的第2个子像素110不发光时S6连接的第3个子像素110对应的发光器件210的发光亮度。
在这一实施例中，还针对第i条数据线130连接的第1个子像素110发光亮度较暗的情况，增大了第i条数据线130连接的第1个子像素110对应的发光器件210的发光亮度，达到了进一步提升显示面板10的亮度均一性的目的。
实施例五：
本申请实施例还提供一种显示装置30，包括显示面板10和如上述任意一个实施例中的背光模组20。
具体来说，图6是本申请实施例五提供的一种显示装置的结构示意图。如图6所示，显示面板10包括多个子像素110和多条数据线130，多条数据线130中的每条数据线130均与多个子像素110中的至少两个子像素110连接。
背光模组20包括多个发光器件210和控制器220，多个发光器件210与多个子像素110一一对应，以使多个发光器件210一一为多个子像素110提供光源，控制器220用于控制多个发光器件210中的每个发光器件210的发光亮度。对于目标灰阶不变的M条数据线130中的第i条数据线130连接的第j+1个子像素110，控制器220在第i条数据线130连接的第j个子像素110不发光时，控制第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度高于第i条数据线130连接的第j个子像素110发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度，i为大于1且小于M的整数，j为正整数。
在一些实施例中，背光模组20还包括多个驱动电路230，多个驱动电路230与多个发光器件210一一对应。多个驱动电路230中的每个驱动电路230的第一输入端b均与电源32的输出端a连接，多个驱动电路230中的每个驱动电路230的输出端d与对应的发光器件210连接。控制器220与多个驱动电路230中的每个驱动电路230的第二输入端e连接，控制器220通过控制多个驱动电路230中的每个驱动电路230输出至对应发光器件210的驱动电流来控制多个发光器件210中的每个发光器件210的发光亮度。
在一些实施例中，多个驱动电路230中的每个驱动电路230均包括第一晶体管TFT1、第二晶体管TFT2和电容C。第一晶体管TFT1的输入端与电源32的输出端a连接，第一晶体管TFT1的输出端与驱动电路230对应的发光器件210连接，第一晶体管TFT1的控制端与第二晶体管TFT2的输出端连接。电容C的第一极板与第一晶体管TFT1的输入端连接，电容C的第二极板与第一晶体管TFT1的控制端连接。第二晶体管TFT2的输入端与控制器220连接，控制器220通过控制输出至第二晶体管TFT2的输入端的电压来控制多个驱动电路230中的每个驱动电路230输出至对应发光器件210的驱动电流。
在一些实施例中，控制器220存储有第一对应关系，第一对应关系为目标灰阶与第一电压之间的对应关系。控制器220用于：在第i条数据线130连接的第j个子像素110不发光时，根据第i条数据线130连接的第j+1个子像素110的目标灰阶从第一对应关系中获取对应的第一电压，并根据第一电压向第i条数据线130连接的第j+1个子像素110对应的驱动电路230的第二晶体管TFT2的输入端输入电压。控制器220存储有第二对应关系，第二对应关系为目标灰阶与第二电压之间的对应关系，且任一目标灰阶在第一对应关系中对应的第一电压大于在第二对应关系中对应的第二电压。控制器220用于：在第i条数据线130连接的第j个子像素110发光时，根据第i条数据线130连接的第j+1个子像素110的目标灰阶从第二对应关系中获取对应的第二电压，并根据第二电压向第i条数据线130连接的第j+1个子像素110对应的驱动电路230的第二晶体管TFT2的输入端输入电压。
在一些实施例中，目标灰阶大于或等于0，且小于或等于8时，每增加1灰阶，第一电压与第二电压的差值增加0.15伏。目标灰阶大于8，且小于或等于20时，每增加1灰阶，第一电压与第二电压的差值增加0.02伏。目标灰阶大于20，且小于或等于220时，每增加1灰阶，第一电压与第二电压的差值增加0.01伏。目标灰阶大于220，且小于或等于225时，每增加1灰阶，第一电压与第二电压的差值增加0.02伏。目标灰阶大于225，且小于或等于238时，每增加1灰阶，第一电压与第二电压的差值增加0.03伏。目标灰阶大于238，且小于或等于244时，每增加1灰阶，第一电压与第二电压的差值增 加0.04伏。目标灰阶大于244，且小于或等于247时，每增加1灰阶，第一电压与第二电压的差值增加0.05伏。目标灰阶大于247，且小于或等于255时，每增加1灰阶，第一电压与第二电压的差值增加0.06伏。
在一些实施例中，若M条数据线130中的第1条数据线130连接的第p个子像素110的目标灰阶等于第i条数据线130连接的第j+1个子像素110的目标灰阶，则控制器220控制第1条数据线130连接的第p个子像素110对应的发光器件210的发光亮度等于第i条数据线130连接的第j个子像素110不发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度，其中，p为正整数，第1条数据线130连接的第p个子像素110的颜色与第i条数据线130连接的第j+1个子像素110相同。
在一些实施例中，若M条数据线130中的第M条数据线130连接的第p个子像素110的目标灰阶等于第i条数据线130连接的第j+1个子像素110的目标灰阶，则控制器220控制第M条数据线130连接的第p个子像素110对应的发光器件210的发光亮度等于第i条数据线130连接的第j个子像素110不发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度，其中，p为正整数，第M条数据线130连接的第p个子像素110的颜色与第i条数据线130连接的第j+1个子像素110相同。
在一些实施例中，多个发光器件210中的每个发光器件210均为次毫米发光二极管、微发光二极管中的一个。
在本申请实施例中，背光模组20包括多个发光器件210和控制器220，多个发光器件210一一为多个子像素110提供光源，控制器220用于控制每个发光器件210的发光亮度。背光模组20工作时，对于目标灰阶不变的第i条数据线130连接的第j+1个子像素110，控制器220在第i条数据线130连接的第j个子像素110不发光时，控制第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度高于第i条数据线130连接的第j个子像素110发光时第i条数据线130连接的第j+1个子像素110对应的发光器件210的发光亮度。也就是说，对于第i条数据线130连接的多个子像素110，若该数据线130不需要对其中一个子像素110充电，那么在下一个子像素110发光时，控制器220会提高下一子像素110对应的发光器件210的发光亮度，从而使下一子像素110的实际灰阶达到目标灰阶，进而提升显示装置30的亮度均一性。
同时，还针对第1条数据线130和第M条数据线130连接的子像素110发光亮度较暗的情况，增大了第1条数据线130和第M条数据线130连接的子像素110对应的发光器件210的发光亮度，达到了进一步提升显示装置30的亮度均一性的目的。
以上所述实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围，均应包含在本申请的保护范围之内。

Claims (16)

  1. 一种背光模组，应用于显示装置(30)，所述显示装置(30)包括显示面板(10)，所述显示面板(10)包括多个子像素(110)和M条数据线(130)，所述M条数据线(130)中的每条数据线(130)均与所述多个子像素(110)中的至少两个子像素(110)连接，所述M为大于3的整数；其中，
    所述背光模组(20)包括多个发光器件(210)和控制器(220)，所述多个发光器件(210)与所述多个子像素(110)一一对应，以使所述多个发光器件(210)一一为所述多个子像素(110)提供光源，所述控制器(220)用于控制所述多个发光器件(210)中的每个发光器件(210)的发光亮度；
    所述控制器(220)用于在所述M条数据线(130)中的第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶不变时，控制第一发光亮度大于第二发光亮度；所述第一发光亮度为所述第i条数据线(130)连接的第j个子像素(110)不发光时，所述第i条数据线(130)连接的第j+1个子像素(110)对应的发光器件(210)的发光亮度；所述第二发光亮度为所述第i条数据线(130)连接的第j个子像素(110)发光时，所述第i条数据线(130)连接的第j+1个子像素(110)对应的发光器件(210)的发光亮度，所述i为大于1且小于M的整数，所述j为正整数。
  2. 如权利要求1所述的背光模组，其中，所述背光模组(20)还包括多个驱动电路(230)，所述多个驱动电路(230)与所述多个发光器件(210)一一对应，所述多个驱动电路(230)中的每个驱动电路(230)的第一输入端均与电源(32)的输出端连接，所述多个驱动电路(230)中的每个驱动电路(230)的输出端与对应的发光器件(210)连接；
    所述控制器(220)与所述多个驱动电路(230)中的每个驱动电路(230)的第二输入端连接，所述控制器(220)用于控制所述每个驱动电路(230)输出至对应发光器件(210)的驱动电流，以控制所述多个发光器件(210)中的每个发光器件(210)的发光亮度。
  3. 如权利要求2所述的背光模组，其中，所述多个驱动电路(230)中的每个驱动电路(230)均包括可变电阻；
    所述可变电阻与所述控制器(220)连接，所述控制器(220)通过控制所述每个驱动电路(230)中的可变电阻的阻值大小来控制所述每个驱动电路(230)输出至对应发光器件(210)的驱动电流。
  4. 如权利要求2所述的背光模组，其中，所述多个驱动电路(230)中的每个驱动电路(230)均包括第一晶体管、第二晶体管和电容；
    所述第一晶体管的输入端与所述电源(32)的输出端连接，所述第一晶体管的输出端与所述驱动电路(230)对应的发光器件(210)连接，所述第一晶体管的控制端与所述第二晶体管的输出端连接；
    所述电容的第一极板与所述第一晶体管的输入端连接，所述电容的第二极板与所述第一晶体管的控制端连接；
    所述第二晶体管的输入端与所述控制器(220)连接，所述控制器(220)通过控制输出至所述第二晶体管的输入端的电压来控制所述每个驱动电路(230)输出至对应发光器件(210)的驱动电流。
  5. 如权利要求4所述的背光模组，其中，所述控制器(220)存储有第一对应关系，所述第一对应关系为目标灰阶与第一电压之间的对应关系；所述控制器(220)用于：在所述第i条数据线(130)连接的第j个子像素(110)不发光时，根据所述第i条数据线(130)连接的第j+1个子像素(110)的目 标灰阶从所述第一对应关系中获取对应的第一电压，并根据所述第一电压向所述第i条数据线(130)连接的第j+1个子像素(110)对应的驱动电路(230)的第二晶体管的输入端输入电压；
    所述控制器(220)存储有第二对应关系，所述第二对应关系为目标灰阶与第二电压之间的对应关系，且任一目标灰阶在所述第一对应关系中对应的第一电压大于在所述第二对应关系中对应的第二电压；所述控制器(220)用于：在所述第i条数据线(130)连接的第j个子像素(110)发光时，根据所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶从所述第二对应关系中获取对应的第二电压，并根据所述第二电压向所述第i条数据线(130)连接的第j+1个子像素(110)对应的驱动电路(230)的第二晶体管的输入端输入电压。
  6. 如权利要求5所述的背光模组，其中，任意一个目标灰阶在所述第一对应关系中对应的第一电压大于在所述第二对应关系中对应的第二电压。
  7. 如权利要求6所述的背光模组，其中，所述目标灰阶大于或等于0，且小于或等于8时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.15伏；所述目标灰阶大于8，且小于或等于20时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.02伏；所述目标灰阶大于20，且小于或等于220时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.01伏；所述目标灰阶大于220，且小于或等于225时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.02伏；所述目标灰阶大于225，且小于或等于238时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.03伏；所述目标灰阶大于238，且小于或等于244时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.04伏；所述目标灰阶大于244，且小于或等于247时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.05伏；所述目标灰阶大于247，且小于或等于255时，每增加1灰阶，所述第一电压与所述第二电压的差值增加0.06伏。
  8. 如权利要求1所述的背光模组，其中，所述多个子像素(110)包括R子像素(110)、G子像素(110)和B子像素(110)；
    当所述第i条数据线(130)连接的第j+1个子像素(110)为所述R子像素(110)、所述G子像素(110)、所述B子像素(110)中的一个时，对应的第二发光亮度不等于所述第i条数据线(130)连接的第j+1个子像素(110)为所述R子像素(110)、所述G子像素(110)、所述B子像素(110)中的另一个时对应的第二发光亮度。
  9. 如权利要求8所述的背光模组，其中，所述背光模组(20)还包括多个驱动电路(230)，所述多个驱动电路(230)与所述多个发光器件(210)一一对应；
    所述多个驱动电路(230)中的每个驱动电路(230)均包括第一晶体管、第二晶体管和电容；
    所述第一晶体管的输入端与电源(32)的输出端连接，所述第一晶体管的输出端与所述驱动电路(230)对应的发光器件(210)连接，所述第一晶体管的控制端与所述第二晶体管的输出端连接；
    所述电容的第一极板与所述第一晶体管的输入端连接，所述电容的第二极板与所述第一晶体管的控制端连接；
    所述第二晶体管的输入端与所述控制器(220)连接，所述控制器(220)通过控制输出至所述第二晶体管的输入端的电压来控制所述每个驱动电路(230)输出至对应发光器件(210)的驱动电流。
  10. 如权利要求9所述的背光模组，其中，对于所述R子像素(110)、所述G子像素(110)和所述B子像素(110)所述控制器(220)分别存储有第一对应关系，所述第一对应关系为目标灰阶与第一电压之间的对应关系；所述控制器(220)用于：在所述第i条数据线(130)连接的第j个子像素(110)不发光时，根据所述第i条数据线(130)连接的第j+1个子像素(110)的颜色获取所述第i条数据线(130)连接的第j+1个子像素(110)对应的第一对应关系，再根据所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶从所述第i条数据线(130)连接的第j+1个子像素(110)对应的第一对应关系中获取对应的第一电压，并根据所述第一电压向所述第i条数据线(130)连接的第j+1个子像素(110)对应的驱动电路(230)的第二晶体管的输入端输入电压；
    对于所述R子像素(110)、所述G子像素(110)和所述B子像素(110)所述控制器(220)分别存储有第二对应关系，所述第二对应关系为目标灰阶与第二电压之间的对应关系，且任一目标灰阶在所述第一对应关系中对应的第一电压大于在所述第二对应关系中对应的第二电压；所述控制器(220)用于：在所述第i条数据线(130)连接的第j个子像素(110)发光时，根据所述第i条数据线(130)连接的第j+1个子像素(110)的颜色获取所述第i条数据线(130)连接的第j+1个子像素(110)对应的第二对应关系，再根据所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶从所述第i条数据线(130)连接的第j+1个子像素(110)对应的第二对应关系中获取对应的第二电压，并根据所述第二电压向所述第i条数据线(130)连接的第j+1个子像素(110)对应的驱动电路(230)的第二晶体管的输入端输入电压。
  11. 如权利要求1所述的背光模组，其中，若所述M条数据线(130)中的第1条数据线(130)连接的第p个子像素(110)的目标灰阶等于所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶，则所述控制器(220)控制第三发光亮度等于所述第一发光亮度；所述第三发光亮度为所述第1条数据线(130)连接的第p个子像素(110)对应的发光器件(210)的发光亮度；其中，所述p为正整数，所述第1条数据线(130)连接的第p个子像素(110)的颜色与所述第i条数据线(130)连接的第j+1个子像素(110)相同。
  12. 如权利要求1所述的背光模组，其中，若所述M条数据线(130)中的第M条数据线(130)连接的第p个子像素(110)的目标灰阶等于所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶，则所述控制器(220)控制第四发光亮度等于所述第一发光亮度；所述第四发光亮度为所述第M条数据线(130)连接的第p个子像素(110)对应的发光器件(210)的发光亮度；其中，所述p为正整数，所述第M条数据线(130)连接的第p个子像素(110)的颜色与所述第i条数据线(130)连接的第j+1个子像素(110)相同。
  13. 如权利要求1至12任意一项所述的背光模组，其中，若所述M条数据线(130)中的第i条数据线(130)连接的第一个子像素(110)的目标灰阶等于所述第i条数据线(130)连接的第j+1个子像素(110)的目标灰阶，则所述控制器(220)控制所述第i条数据线(130)连接的第一个子像素(110)的发光亮度等于所述第一发光亮度；其中，所述第i条数据线(130)连接的第一个子像素(110)的颜色与所述第i条数据线(130)连接的第j+1个子像素(110)相同。
  14. 如权利要求1至12任意一项所述的背光模组，其中，所述多个发光器件(210)中的每个发光器件(210)均为次毫米发光二极管、微发光二极管中的一个。
  15. 一种显示装置，其中，包括显示面板(10)和如权利要求1至14任意一项所述的背光模组(20)；
    所述显示面板(10)包括多个子像素(110)和M条数据线(130)，所述M条数据线(130)中的每条数据线(130)均与所述多个子像素(110)中的至少两个子像素(110)连接，所述M为大于3的整数。
  16. 如权利要求15所述的显示装置，其中，所述多个子像素(110)呈N行M-1列排布，所述j为小于或等于N-1的正整数；
    所述M条数据线(130)中的第1条数据线(130)与奇数行的第1个子像素(110)连接，所述M条数据线(130)中的第M条数据线(130)与偶数行的第M-1个子像素(110)连接，所述第i条数据线(130)与奇数行的第i个子像素(110)及偶数行的第i-1个子像素(110)连接。
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