Backlight module and display device

Abstract

The present disclosure discloses a backlight module and a display device, and relates to the display technical field. The backlight module (20) includes a plurality of light emitting elements (210) and a controller (220). The plurality of light emitting elements (210) provide light sources for a plurality of sub-pixels (110) in a one-to-one correspondence. The controller (220) controls the luminance of each light emitting element (210). When the backlight module (20) is in operation, for a plurality of sub-pixels (110) connected to an i-th data line (130), if the data line (130) does not need to charge one of the sub-pixels (110), the controller (220) enhances the luminance of the light emitting element (210) corresponding to the next sub-pixel (110) when the next sub-pixel (110) emits light. In this way, the actual gray scale of each sub-pixel (110) can reach the target gray scale, and the luminance uniformity of the display panel (10) is improved.

Description

[Technical Field]

[0001] This disclosure claims priority to a Chinese patent application bearing application number 202210410608.6 and entitled "Backlight module and display device," filed with the State Intellectual Property Office of the People's Republic of China on April 19, 2022, the entire contents of which are incorporated herein by reference. The present disclosure relates to the field of display technology, and in particular to a backlight module and a display device. [Background technology]

[0002] The display device includes a backlight module and a display panel. The display panel includes a plurality of scan lines, a plurality of data lines, a plurality of sub-pixels, and a plurality of switch circuits corresponding to the sub-pixels one-to-one. The backlight module is used to provide light sources for the sub-pixels in the display panel. When the display panel operates, the scan line control switch circuit is turned on. The data lines write data voltages to the corresponding sub-pixels through the switch circuits, charging the sub-pixels and causing the corresponding sub-pixels to emit light.

[0003] In the related art, when a display device displays a frame of image, a plurality of scanning lines output scanning signals one by one starting from the first scanning line to control a plurality of sub-pixels to emit light, and during this process, the polarity of the data voltage output from each data line relative to the common voltage remains unchanged.

[0004] However, if there are multiple subpixels connected to the same data line and that data line does not need to charge one of the subpixels, when that data line charges the next subpixel, the voltage on the data line must rise again from zero, which means that the amount of charge in the next subpixel cannot reach the amount of charge required for light emission, resulting in uneven light emission brightness from the display panel. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the embodiments of the present disclosure is to provide a backlight module and a display device that can solve the problem of uneven luminance of a display panel in the related art. [Means for solving the problem]

[0006] A first aspect provides a backlight module for use in a display device including a display panel including a plurality of sub-pixels and M data lines (M is an integer greater than 3) each connected to at least two of the plurality of sub-pixels, the backlight module includes a plurality of light emitting elements each corresponding to one of the plurality of sub-pixels to provide a light source for the sub-pixel; and a controller for controlling the light emission brightness of each of the plurality of light emitting elements, the controller controls the first light-emitting luminance to be greater than the second light-emitting luminance when a target gray scale of a j+1-th (j is a positive integer) sub-pixel connected to an i-th (i is an integer greater than 1 and less than M) data line among the M data lines is unchanged; the first emission luminance is the emission luminance of a light-emitting element corresponding to a j+1-th 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 emission luminance is the emission luminance of a light-emitting element 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.

[0007] The backlight module further includes a plurality of driving circuits corresponding to the plurality of light emitting elements one by one, and each of the plurality of driving circuits has a first input terminal connected to an output terminal of a power source and an output terminal connected to a corresponding light emitting element; The controller may be connected to the second input terminal of each of the plurality of driving circuits, and may control the driving current output by each of the driving circuits to a corresponding light-emitting element, thereby controlling the light-emitting brightness of each of the plurality of light-emitting elements.

[0008] each of the plurality of drive circuits includes a first transistor, a second transistor, and a capacitor; the first transistor has an input terminal connected to the output terminal of the power supply, an output terminal connected to a light emitting element corresponding to the driving circuit, and a control terminal connected to the output terminal of the second transistor; The capacitor has a first electrode connected to the input terminal of the first transistor and a second electrode connected to the control terminal of the first transistor; the second transistor has an input terminal connected to the controller; The controller may control a voltage output to an input terminal of the second transistor, thereby controlling a driving current output from each of the driving circuits to a corresponding light emitting element.

[0009] a first correspondence relationship between a target gray scale and a first voltage is stored in the controller; the controller, when the jth sub-pixel connected to the ith data line does not emit light, obtains a corresponding first voltage from the first correspondence relationship according to a target gray scale of the j+1th sub-pixel connected to the ith data line, and inputs a voltage to an input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the ith data line according to the first voltage; a second correspondence relationship between a target gray scale and a second voltage is stored in the controller, and a first voltage corresponding to any target gray scale in the first correspondence relationship is greater than a second voltage corresponding to any target gray scale in the second correspondence relationship; When the jth sub-pixel connected to the i-th data line emits light, the controller may obtain a corresponding second voltage from the second correspondence relationship based on a target gray scale of the j+1th sub-pixel connected to the i-th data line, and input a voltage to the input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the i-th data line based on the second voltage.

[0010] When the target gray scale is greater than or equal to 0 and less than or equal to 8, the difference value between the first voltage and the second voltage increases by 0.15 volts for each gray scale increase; If the target gray scale is greater than 8 and is equal to or less than 20, the difference value between the first voltage and the second voltage increases by 0.02 volts for each gray scale increase; If the target gray scale is greater than 20 and is equal to or less than 220, the difference value between the first voltage and the second voltage increases by 0.01 volts for each gray scale increase; If the target grayscale is greater than 220 but less than or equal to 225, the difference between the first voltage and the second voltage increases by 0.02 volts for each grayscale increase; If the target gray scale is greater than 225 and is equal to or less than 238, the difference value between the first voltage and the second voltage increases by 0.03 volts for each gray scale increase; If the target grayscale is greater than 238 but less than or equal to 244, the difference value between the first voltage and the second voltage increases by 0.04 volts for each grayscale increase; If the target gray scale is greater than 244 but less than or equal to 247, the difference value between the first voltage and the second voltage increases by 0.05 volts for each gray scale increase; If the target grayscale is greater than 247 and less than or equal to 255, the difference value between the first voltage and the second voltage may increase by 0.06 volts for each increase of one grayscale.

[0011] the controller controls the third light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of a p-th sub-pixel connected to a first data line among the M data lines is equal to a target gray scale of a j+1-th sub-pixel connected to the i-th data line; the third light-emitting luminance is the light-emitting luminance of a light-emitting element corresponding to a p-th sub-pixel (p is a positive integer) connected to the first data line; The color of the p-th sub-pixel connected to the first data line may be the same as the color of the j+1-th sub-pixel connected to the i-th data line.

[0012] the controller controls the fourth light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of a p-th sub-pixel connected to an M-th data line among the M data lines is equal to a target gray scale of a j+1-th sub-pixel connected to the i-th data line; the fourth light emission luminance is the light emission luminance of a light emitting element corresponding to a pth sub-pixel (p is a positive integer) connected to the Mth data line; The color of the p-th sub-pixel connected to the M-th data line may be the same as the color of the j+1-th sub-pixel connected to the i-th data line.

[0013] Each of the plurality of light-emitting elements may be one of a submillimeter light-emitting diode and a micro light-emitting diode.

[0014] A second aspect provides a display device comprising a display panel and a backlight module according to any one of the first aspects, The display panel includes a plurality of sub-pixels and M (M is an integer greater than 3) data lines, each connected to at least two of the plurality of sub-pixels.

[0015] The plurality of sub-pixels are arranged in N rows and M-1 columns, and j is a positive integer equal to or less than N-1. The first data line of the M data lines may be connected to the first subpixel in an odd-numbered row, the Mth data line of the M data lines may be connected to the (M-1)th subpixel in an even-numbered row, and the i-th data line may be connected to the i-th subpixel in an odd-numbered row and the i-1-th subpixel in an even-numbered row.

[0016] The effects of the second aspect can be understood by referring to the description related to the first aspect, and will not be described in detail here. [Effects of the Invention]

[0017] In the present disclosure, a backlight module includes a plurality of light-emitting elements that provide light sources for a plurality of subpixels in a one-to-one correspondence, and a controller that controls the emission brightness of each light-emitting element. When the backlight module is in operation, the controller controls the j+1-th subpixel connected to the i-th data line, whose target grayscale remains unchanged, so that a first emission brightness is greater than a second emission brightness. The first emission brightness is the emission brightness of the light-emitting element corresponding to the j+1-th subpixel connected to the i-th data line when the j-th subpixel connected to the i-th data line does not emit light. The second emission brightness is the emission brightness of the light-emitting element corresponding to the j+1-th subpixel connected to the i-th data line when the j-th subpixel connected to the i-th data line emits light. That is, for the plurality of subpixels connected to the i-th data line, when the data line does not need to charge one of the subpixels, the controller increases the emission brightness of the light-emitting element corresponding to the next subpixel when the next subpixel emits light, thereby allowing the actual grayscale of the next subpixel to reach the target grayscale and improving the brightness uniformity of the display panel. [Brief explanation of the drawings]

[0018] In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following briefly introduces drawings necessary for describing the embodiments. Needless to say, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without creative work. [Figure 1] 1 is a structural schematic diagram of a display panel according to a first embodiment of the present disclosure. [Figure 2] 1 is a structural schematic diagram of a first viewing angle of a display device according to a first embodiment of the present disclosure. [Figure 3] FIG. 4 is a structural schematic diagram of a second viewing angle of the display device according to the first embodiment of the present disclosure. [Figure 4] FIG. 10 is a schematic diagram of a circuit structure of a backlight module according to a second embodiment of the present disclosure. [Figure 5]FIG. 10 is a circuit diagram of a drive circuit according to a second embodiment of the present disclosure. [Figure 6] FIG. 10 is a structural schematic diagram of a display device according to Example 5 of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE INVENTION In order to make the objectives, technical solutions and technical effects of the present disclosure clearer, the embodiments of the present disclosure will be described in more detail below in conjunction with the drawings.

[0020] In this disclosure, "plurality" means two or more than two. In this disclosure, " / " means "or" unless otherwise specified, for example, A / B can mean A or B. In this disclosure, "and / or" merely describes the relationship between related objects and means that three types of relationships may exist. For example, A and / or B can mean three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, to facilitate clear explanation of the technical solutions of the present disclosure, terms such as "first" and "second" are used to distinguish between identical or similar items that have essentially the same functions and actions. It will be understood by those skilled in the art that terms such as "first" and "second" do not limit the number or execution order, nor do they necessarily limit different items.

[0021] Hereinafter, the working principle of the backlight module according to the embodiment of the present disclosure will be described in detail in relation to the structure of the display panel.

[0022] The backlight module is used in a display device. The display device further includes a display panel in addition to the backlight module. The display panel includes a plurality of subpixels, a plurality of switch circuits, a plurality of scan lines, and a plurality of data lines. The number of switch circuits is equal to the number of subpixels. The plurality of switching circuits are connected to the plurality of subpixels in a one-to-one correspondence. Each switching circuit has an input terminal, an output terminal, and a control terminal. The control terminal of the switch circuit controls the on / off state between the input terminal and the output terminal of the switch circuit. Each of the plurality of switch circuits has an input terminal connected to one data line, a control terminal connected to one scan line, and an output terminal connected to a corresponding subpixel. In this way, when a scan line outputs a scan signal, all switch circuits connected to the scan line are turned on. When a switch circuit is turned on, the data voltage on the data line can be output to the subpixel connected to the switch circuit via the switch circuit. Each subpixel generally may include a pixel electrode and may further include a color resist located on the pixel electrode. The pixel electrode is used to generate a voltage difference with a common electrode. The liquid crystal is disposed between the pixel electrode and the common electrode. When a voltage difference exists between the pixel electrode and the common electrode, an electric field is formed between the pixel electrode and the common electrode. The electric field rotates the liquid crystal, allowing light emitted from the backlight to pass through the sub-pixels, thereby achieving the purpose of luminescence display. Generally, the voltage of the common electrode is constant, and the data voltage on the data line is used to output to the pixel electrode. By connecting multiple switch circuits connected to the same data line to different scanning lines, data voltages can be input individually for each sub-pixel.

[0023] FIG. 1 is a schematic structural diagram of a display panel 10 according to the present disclosure. As shown in FIG. 1, the display panel 10 includes 36 subpixels 110, 36 switch circuits 120, four scan lines 140, and 10 data lines 130. The 36 subpixels 110 are arranged in 4 rows and 9 columns, including 12 R (Red) subpixels, 12 G (Green) subpixels, and 12 B (Blue) subpixels. The switch circuits 120 correspond one-to-one to the subpixels 110, and the output terminal of each switch circuit 120 is connected to the corresponding subpixel 110. For ease of explanation, the 10 data lines 130 are referred to as S1, S2, S10, and S10, respectively. The four scan lines 140 are referred to as G1, G2, G3, and G4, respectively. Each data line 130 extends in the column direction, and each scan line 140 extends in the row direction. The control terminals of the switch circuits 120 corresponding to the subpixels 110 located in the first row are all connected to G1, the control terminals of the switch circuits 120 corresponding to the subpixels 110 located in the second row are all connected to G2, ... S1 is connected to the input terminal of the switch circuit 120 corresponding to the first subpixel 110 located in the odd-numbered rows (the first and third rows), and S10 is connected to the input terminal of the switch circuit 120 corresponding to the ninth subpixel 110 located in the even-numbered rows (the second and fourth rows). Between S1 and S10, S (i.e., the ith data line 130 along the left-to-right direction on the paper, where i is an integer greater than 1 and less than 10, for example, 2, 3, 4, or 9) is connected to the input terminal of the switch circuit 120 corresponding to the ith subpixel 110 located in the odd-numbered row and the input terminal of the switch circuit 120 corresponding to the (i-1)th subpixel 110 located in the even-numbered row.

[0024] When the display panel 10 displays one frame of an image, G1, G2, G3, and G4 output scan signals in sequence. When G1 outputs a scan signal, all switch circuits 120 corresponding to the subpixels 110 located in the first row are turned on. At this time, S1 to S9 output data voltages, charging all of the subpixels 110 located in the first row, causing all of the subpixels 110 located in the first row to emit light. When G2 outputs a scan signal, all switch circuits 120 corresponding to the subpixels 110 located in the second row are turned on. At this time, S2 to S10 output data voltages, charging all of the subpixels 110 located in the second row, causing all of the subpixels 110 located in the second row to emit light. ...When G4 outputs a scan signal, all switch circuits 120 corresponding to the subpixels 110 located in the fourth row are turned on. At this time, S2 to S10 output data voltages, charging all of the subpixels 110 located in the fourth row, causing all of the subpixels 110 located in the fourth row to emit light. In the process of displaying one frame of image, the data voltages output by each data line 130 are invariant with respect to the polarity of the common voltage. In the process of displaying the next frame of image, the data voltages output by each data line 130 may be variable with respect to the polarity of the common voltage. For example, when the common voltage is 0V and the display panel 10 displays a monochrome image (each subpixel 110 has the same gray scale), in the process of displaying the first frame of image, the data voltage output by S1 may be equal to 7V, the data voltage output by S2 may be equal to −7V, the data voltage output by S3 may be equal to 7V, and the data voltage output by S10 may be equal to −7V. In the process of displaying the second frame of image, the data voltage output by S1 may be equal to −7V, the data voltage output by S2 may be equal to 7V, the data voltage output by S3 may be equal to −7V, and the data voltage output by S10 may be equal to 7V.

[0025] However, in some specific application environments, some subpixels 110 in the display panel 10 do not emit light, i.e., the data lines 130 do not need to charge some subpixels 110. For example, when the display panel 10 displays a blue-green screen, none of the R subpixels in the display panel 10 emit light. Taking four subpixels 110 connected to S3 and four subpixels 110 connected to S5 as an example, when G1 outputs a scan signal, S3 needs to output a data voltage (e.g., 7V) to the third subpixel 110 located in the first row, i.e., the B subpixel. When G2 outputs a scan signal, S3 needs to output a data voltage (e.g., 7V) to the second subpixel 110 located in the second row, i.e., the G subpixel. That is, when G1 and G2 output scan signals in sequence, the voltage in S3 is always 7V. In other words, during this process, the data voltage written to the second subpixel 110 located in the second row does not need to increase from 0 to 7V. When G2 outputs a scan signal, S5 does not need to output a data voltage to the fourth subpixel 110 located in the second row, i.e., the R subpixel, and the voltage within S5 is 0. When G3 outputs a scan signal, S5 needs to output a data voltage (e.g., 7V) to the fifth subpixel 110 located in the third row, i.e., the G subpixel. That is, during the process of G3 outputting the scan signal, the voltage within S5 needs to increase from 0 to 7V. In other words, during this process, the data voltage written to the fifth subpixel 110 located in the third row needs to increase from 0 to 7V. In this case, the charge amount of the fifth subpixel 110 located in the third row will necessarily be lower than that of the second subpixel 110 located in the second row, which has the same color. The same principle applies to the entire display panel 10, so it can be seen that the charge amounts of 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 eighth sub-pixel 110 located in the third row connected to S8 are all lower than the charge amounts of the G sub-pixels connected to S3, S6, and S9.Furthermore, the charge amounts of the third subpixel 110 located in the second row and connected to S4, the third subpixel 110 located in the fourth row and connected to S4, the sixth subpixel 110 located in the second row and connected to S7, and the sixth subpixel 110 located in the fourth row and connected to S7 are all lower than the charge amounts of the third subpixel 110 located in the third row and connected to S3 and the third subpixel 110 located in the third row and connected to S6. For two subpixels 110 of the same color with the same backlight luminance, the higher the charge amount of a subpixel 110, the higher the emission luminance of that subpixel 110.

[0026] FIG. 2 is a structural schematic diagram of a display device 30 according to a first embodiment of the present disclosure at a first viewing angle (data lines are not shown), and FIG. 3 is a structural schematic diagram of a display device 30 according to a first embodiment of the present disclosure at a second viewing angle (data lines and scan lines other than G1 are not shown). The first viewing angle and the second viewing angle are two different viewing angles. As shown in FIGS. 2 and 3 , the display device 30 includes a backlight module 20 and the display panel 10 described above. The backlight module 20 includes a plurality of light-emitting elements 210 and a controller 220 (not shown). The number of the light-emitting elements 210 is equal to the number of sub-pixels 110 in the display panel 10. The plurality of light-emitting elements 210 correspond one-to-one to the plurality of sub-pixels 110, so that each light-emitting element 210 provides light for only one sub-pixel 110. The controller 220 is connected to the plurality of light-emitting elements 210 and can control the light emission brightness of each light-emitting element 210. Here, the controller 220 controls the first emission luminance to be greater than the second emission luminance for the j+1-th sub-pixel 110 connected to the ith data line 130 among the M data lines 130 for which the target grayscale remains unchanged. Here, the first emission luminance is the emission luminance of the light-emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the ith data line 130 when the j-th sub-pixel 110 connected to the ith data line 130 does not emit light. The second emission luminance is the emission luminance of the light-emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the ith data line 130 when the j-th sub-pixel 110 connected to the ith data line 130 emits light. In other words, when the ith data line 130 does not need to charge a certain sub-pixel 110 on the ith data line 130, the controller 220 increases the luminance of the light-emitting element 210 corresponding to the next sub-pixel 110 when the ith data line 130 charges the next sub-pixel 110. Here, the jth subpixel 110 and the j+1th subpixel 110 connected to the ith data line 130 are ordered from top to bottom on the page. In the embodiment shown in FIG. 1 , M is equal to 10. In some other not-shown embodiments, M may be any integer greater than 2, for example, M is equal to 10, 13, or 7. 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.

[0027] Specifically, when the display device 30 is in operation, an electric field is formed between the pixel electrode and the common electrode in each sub-pixel 110 of the display panel 10, and the electric field rotates the liquid crystal, allowing light emitted by the light-emitting element 210 to pass through the corresponding sub-pixel 110. When the i-th data line 130 of the M data lines 130 does not need to charge the j-th sub-pixel 110 but needs to charge the j+1-th sub-pixel 110 (i.e., when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light but the j+1-th sub-pixel 110 connected to the i-th data line 130 emits light), the charge amount of the j+1-th sub-pixel 110 does not reach the charge amount required for light emission, i.e., the voltage of the pixel electrode does not reach the voltage required for light emission, and the rotation angle of the liquid crystal becomes smaller, resulting in a lower emission brightness of the j+1-th sub-pixel 110. Based on this, when the jth sub-pixel 110 connected to the ith data line 130 does not emit light, the emission luminance of the light-emitting element 210 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 can be improved to improve the emission luminance of the j+1th sub-pixel 110 connected to the ith data line 130, thereby making the actual gray scale of the j+1th sub-pixel 110 connected to the ith data line 130 reach the target gray scale, and further improving the luminance uniformity of the display panel 10. Here, the target gray scale represents the target luminance of the sub-pixel 110, and the actual gray scale represents the actual luminance of the sub-pixel 110.

[0028] An embodiment in which the controller 220 controls the light emitting brightness of the light emitting element 210 will now be described.

[0029] Example 2 4 is a schematic diagram of a circuit structure of a backlight module 20 according to a second embodiment of the present disclosure. As shown in FIG.

[0030] Specifically, the number of driving circuits 230 is the same as the number of light-emitting elements 210. The driving circuits 230 correspond one-to-one to the light-emitting elements 210, so that each driving circuit 230 is used to drive only one light-emitting element 210 to emit light. Each of the 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 source 32, and the output terminal d is connected to the corresponding light-emitting element 210. The second input terminal e of each driving circuit 230 is connected to the controller 220. In this way, when the controller 220 operates, it can control the driving current output by each driving circuit 230 to the corresponding light-emitting element 210, thereby controlling the light-emitting brightness of each light-emitting element 210. Generally, the larger the driving current output by the driving circuit 230 to the corresponding light-emitting element 210, the higher the brightness of the corresponding light-emitting element 210. Therefore, in this embodiment, the operation process of the controller 220 may be as follows: The controller 220 controls the driving current output by the driving circuit 230 corresponding to the light-emitting element 210 corresponding 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, so that the driving current is larger than the driving current output by the driving circuit 230 corresponding to the light-emitting element 210 corresponding 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 emits light, for the j+1-th sub-pixel 110 connected to the i-th data line 130 whose target gray scale is unchanged. In other words, when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the controller 220 increases the driving current output by the driving circuit 230 corresponding to the light-emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130. In this way, the emission brightness of the j+1-th sub-pixel 110 connected to the i-th data line 130 can be improved, so that the actual gray scale of the j+1-th sub-pixel 110 connected to the i-th data line 130 reaches the target gray scale, and further improves the brightness uniformity of the display panel 10.

[0031] FIG. 5 is a circuit diagram of a driving circuit 230 according to a second embodiment of the present disclosure. As shown in FIG. 5, the driving circuit 230 may include a first transistor TFT1, a second transistor TFT2, and a capacitor C. Here, the first transistor TFT1 and the second transistor TFT2 may both be thin film transistors (TFTs). The input terminal of the first transistor TFT1 is connected to the output terminal a of the power source 32. That is, 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 element 210 corresponding to the driving circuit 230. That is, 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. That is, the first electrode of the capacitor C is connected to the input terminal of the first transistor TFT1, and the second electrode 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, 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 receives the SCAN1 signal. In some specific embodiments, the light-emitting element 210 is either a submillimeter light-emitting diode (miniLED) or a micro light-emitting diode (microLED). Here, miniLED refers to a light-emitting diode with a size between 100 microns and 200 microns, and microLED refers to a light-emitting diode with a size of 100 microns or less. The light-emitting element 210 may have an anode connected to the output terminal of the first transistor TFT1 and a cathode connected to a common ground terminal VSS.

[0032] The operation process will be described using the driving circuit 230 corresponding to one light-emitting element 210 as an example. During a first period, a SCAN1 signal is input to the control end of the second transistor TFT2, turning the second transistor TFT2 on. At the same time, the controller 220 outputs a voltage. The voltage output by the controller 220 is written into the capacitor C and stored by the capacitor C. During a second period after the first period, the SCAN1 signal is no longer input to the control end of the second transistor TFT2, turning the second transistor TFT2 off. At this time, the capacitor C discharges to the control end of the first transistor TFT1, turning the first transistor TFT1 on. When the first transistor TFT1 is turned on, a path is formed by the output end a of the power source 32, the first transistor TFT1, the light-emitting element 210, and the common ground, causing a current to flow through the light-emitting element 210, causing the light-emitting element 210 to emit light. Here, the light emission brightness of the light emitting element 210 depends on the output current of the first transistor TFT1, and the output current of the first transistor TFT1 depends on the voltage of the capacitor C, i.e., the voltage output by the controller 220 to the capacitor C. In this way, when the controller 220 operates, it controls the magnitude of the voltage output to the input terminal of the second transistor TFT2 of each drive circuit 230, thereby controlling the magnitude of the drive current output by each drive circuit 230 to the corresponding light emitting element 210, and further controlling the light emission brightness of each light emitting element 210.

[0033] In a specific embodiment, a first correspondence relationship is stored in the controller 220. The first correspondence relationship is a correspondence relationship between the target gray scale and the first voltage. For example, the first correspondence relationship is shown in Table 1 below.

[0034] [Table 1]

[0035] The first correspondence relationship is applied when the jth subpixel 110 connected to the ith data line 130 does not emit light. That is, when the jth subpixel 110 connected to the ith data line 130 does not emit light, the controller 220 obtains a corresponding first voltage from the first correspondence relationship based on the target gray scale of the j+1th subpixel 110 connected to the ith data line 130, and inputs a voltage to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th subpixel 110 connected to the ith data line 130 based on the first voltage.

[0036] Taking the display panel 10 shown in FIG. 1 as an example, when all R subpixels are not emitting light, i may be equal to 5 and j may be equal to 2. That is, the second subpixel 110 connected to the fifth data line 130 (i.e., the fourth subpixel 110 connected to S5 and located in the second row) is not emitting light. In this case, when G3 outputs a scan signal to cause the third subpixel 110 connected to S5 (i.e., the fifth subpixel 110 connected to the third row) to emit light, the controller 220 obtains a corresponding first voltage from the first correspondence relationship based on the target grayscale of the third subpixel 110 connected to S5. For example, when the target grayscale of the third subpixel 110 connected to S5 is 016, the first voltage obtained by the controller 220 is V16 volts. In this case, the controller 220 may output a voltage of V16 volts to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third subpixel 110 connected to S5.

[0037] When all R subpixels are not emitting light, i may be equal to 8 and j may be equal to 2. That is, the second subpixel 110 connected to the eighth data line 130 (i.e., the seventh subpixel 110 connected to S8 and located in the second row) is not emitting light. In this case, when G3 outputs a scan signal to cause the third subpixel 110 connected to S8 (i.e., the eighth subpixel 110 connected to the third row) to emit light, the controller 220 obtains a corresponding first voltage from the first correspondence relationship based on the target grayscale of the third subpixel 110 connected to S8. For example, when the target grayscale of the third subpixel 110 connected to S8 is 007, the first voltage obtained by the controller 220 is V7 volts. In this case, the controller 220 may output a voltage of V7 volts to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third subpixel 110 connected to S8.

[0038] A second correspondence relationship is further stored in the controller 220. The second correspondence relationship is a correspondence relationship between the target gray scale and the second voltage. For example, the second correspondence relationship is shown in Table 2 below.

[0039] [Table 2]

[0040] The second correspondence relationship is applied when the jth subpixel 110 connected to the ith data line 130 emits light. That is, when the jth subpixel 110 connected to the ith data line 130 emits light, the controller 220 obtains a corresponding second voltage from the second correspondence relationship based on the target gray scale of the j+1th subpixel 110 connected to the ith data line 130, and inputs a voltage to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th subpixel 110 connected to the ith data line 130 based on the second voltage.

[0041] Taking the case where "i may be equal to 5 and j may be equal to 2" as an example, that is, the second subpixel 110 connected to the fifth data line 130 (i.e., the fourth subpixel 110 connected to S5 and located in the second row) emits light. At this time, when G3 outputs a scan signal to cause the third subpixel 110 connected to S5 (i.e., the fifth subpixel 110 connected to the third row) to emit light, the controller 220 obtains a corresponding second voltage from the second correspondence relationship based on the target grayscale of the third subpixel 110 connected to S5. For example, when the target grayscale of the third subpixel 110 connected to S5 is 016, the second voltage obtained by the controller 220 is V16-1.51 volts. At this time, the controller 220 can output a voltage having a magnitude of V16-1.51 volts to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third subpixel 110 connected to S5. Therefore, for the third sub-pixel 110 connected to S5, whose target gray scale is 016, when the second sub-pixel 110 connected to S5 does not emit light, the voltage output by the controller 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 compared to when the second sub-pixel 110 connected to S5 emits light. In this way, when the charge amount of the third sub-pixel 110 connected to S5 is insufficient, it is ensured that the actual gray scale of the sub-pixel 110 reaches the target gray scale, and the brightness uniformity of the display panel 10 can be improved.

[0042] Similarly, taking the case where "i may be equal to 8 and j is equal to 2" as an example, that is, the second subpixel 110 connected to the eighth data line 130 (i.e., the seventh subpixel 110 connected to S8 and located in the second row) emits light. At this time, when G3 outputs a scan signal to cause the third subpixel 110 connected to S8 (i.e., the eighth subpixel 110 connected to the third row) to emit light, the controller 220 obtains a corresponding second voltage from the second correspondence relationship based on the target grayscale of the third subpixel 110 connected to S8. For example, when the target grayscale of the third subpixel 110 connected to S8 is 007, the second voltage obtained by the controller 220 is V7-1.2 volts. At this time, the controller 220 can output a voltage having a magnitude of V7-1.2 volts to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the third subpixel 110 connected to S8. Therefore, for the third sub-pixel 110 connected to S8 whose target gray scale is 007, when the second sub-pixel 110 connected to S8 does not emit light, the voltage output by the controller 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 compared to when the second sub-pixel 110 connected to S8 emits light. In this way, when the charge amount of the third sub-pixel 110 connected to S8 is insufficient, it is ensured that the actual gray scale of the sub-pixel 110 reaches the target gray scale, and the brightness uniformity of the display panel 10 can be improved.

[0043] In some specific embodiments, as shown in Tables 1 and 2 above, when the target grayscale is between 0 and 8, the difference between the first and second voltages increases by 0.15 volts for each grayscale increase. When the target grayscale is between 8 and 20, the difference between the first and second voltages increases by 0.02 volts for each grayscale increase. When the target grayscale is between 20 and 220, the difference between the first and second voltages increases by 0.01 volts for each grayscale increase. When the target grayscale is between 220 and 225, the difference between the first and second voltages increases by 0.02 volts for each grayscale increase. When the target grayscale is between 225 and 238, the difference between the first and second voltages increases by 0.03 volts for each grayscale increase. When the target grayscale is between 238 and 244, the difference between the first and second voltages increases by 0.04 volts for each grayscale increase. If the target grayscale is greater than 244 but less than or equal to 247, the difference between the first and second voltages increases by 0.05 volts for each grayscale increase. If the target grayscale is greater than 247 but less than or equal to 255, the difference between the first and second voltages increases by 0.06 volts for each grayscale increase.

[0044] In some specific embodiments, the controller 220 may be provided with a first corresponding relationship and a second corresponding relationship for the R subpixel, the G subpixel, and the B subpixel, respectively. In this case, when the jth subpixel 110 connected to the ith data line 130 does not emit light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is an R subpixel, the controller 220 obtains a corresponding first voltage from the first relationship corresponding to the R subpixel. When the jth subpixel 110 connected to the ith data line 130 emits light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is an R subpixel, the controller 220 obtains a corresponding second voltage from the second relationship corresponding to the R subpixel. When the jth subpixel 110 connected to the ith data line 130 does not emit light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is a G subpixel, the controller 220 obtains a corresponding first voltage from the first relationship corresponding to the G subpixel. When the jth subpixel 110 connected to the ith data line 130 emits light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is a G subpixel, the controller 220 obtains a corresponding second voltage from the second relationship corresponding to the G subpixel. When the jth subpixel 110 connected to the ith data line 130 does not emit light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is a B subpixel, the controller 220 obtains a corresponding first voltage from the first relationship corresponding to the B subpixel. When the jth subpixel 110 connected to the ith data line 130 emits light, the j+1th subpixel 110 connected to the ith data line 130 emits light, and the j+1th subpixel 110 connected to the ith data line 130 is a B subpixel, the controller 220 obtains a corresponding second voltage from the second relationship corresponding to the B subpixel.

[0045] In some other specific embodiments, the controller 220 may have only one first corresponding relationship and one second corresponding relationship. In this case, the controller 220 obtains a corresponding first voltage from the first relationship when the jth sub-pixel 110 connected to the ith data line 130 does not emit light and the j+1th sub-pixel 110 connected to the ith data line 130 emits light. The controller 220 obtains a corresponding second voltage from the second relationship when the jth sub-pixel 110 connected to the ith data line 130 emits light and the j+1th sub-pixel 110 connected to the ith data line 130 emits light. In this specific embodiment, the colors of the sub-pixels 110 are not distinguished.

[0046] In some other embodiments not shown, the drive circuit 230 further includes a variable resistor, in parallel with the embodiment shown in FIG. 5 . The controller 220 is connected to the variable resistor in each drive circuit 230. When the controller 220 operates, it controls the resistance value of the variable resistor in each drive circuit 230 to control the magnitude of the drive current output by each drive circuit 230 to the corresponding light-emitting element 210, and further controls the light-emitting brightness of each light-emitting element 210. For example, if the light-emitting brightness of a certain light-emitting element 210 needs to be increased, the controller 220 may control the variable resistor in the drive circuit 230 corresponding to that light-emitting element 210 to decrease its resistance value. Conversely, if the light-emitting brightness of a certain light-emitting element 210 needs to be decreased, the controller 220 may control the variable resistor in the drive circuit 230 corresponding to that light-emitting element 210 to increase its resistance value. This will not be described further here.

[0047] In the above embodiment, when the jth sub-pixel 110 connected to the ith data line 130 does not emit light and the charge amount of the j+1th sub-pixel 110 connected to the ith data line 130 is insufficient, the emission brightness of the light-emitting element 210 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 is increased, thereby achieving the purpose of improving the brightness uniformity of the display panel 10. Here, i is an integer greater than 1 and less than M, and j is a positive integer.

[0048] The operation principle of the backlight module 20 will be further described below in the case where the emission luminance of the sub-pixels 110 connected to the first data line 130 and the Mth data line 130 is low.

[0049] Example 3 Regarding the first data line 130 Referring to the display panel 10 shown in FIG. 1 , a first data line 130 (i.e., S1) is connected to an input terminal of a switch circuit 120 corresponding to a first subpixel 110 located in an odd-numbered row (the first and third rows). When the display panel 10 displays a frame of image, if all of the subpixels 110 connected to S1 emit light, the voltage at S1 is 0 before G1 outputs a scan signal. When G1 outputs a scan signal, S1 needs to output a data voltage (e.g., 7V) to the first subpixel 110 located in the first row. When G2 outputs a scan signal, S1 does not need to output a data voltage. When G3 outputs a scan signal, S1 needs to output a data voltage (e.g., 7V) to the first subpixel 110 located in the third row. In other words, during the process of G1 and G3 outputting scan signals, the voltage at S1 needs to rise from 0 to 7V. In other words, when the display panel 10 displays one frame of an image, if the p-th sub-pixel 110 connected to S1 emits light, the data voltage written to the p-th sub-pixel 110 connected to S1 must all increase from 0 to 7 V. In this case, the p-th sub-pixel 110 connected to S1 may be insufficiently charged, which may result in a dim emission of light from the sub-pixel 110. p may be any positive integer.

[0050] When the controller 220 operates based on the above-described conditions, if the target grayscale of the pth subpixel 110 connected to S1 is equal to the target grayscale of the j+1th subpixel 110 connected to S1, the controller 220 controls the third emission luminance to be equal to the first emission luminance. Here, the third emission luminance is the emission luminance of the light-emitting element 210 corresponding to the pth subpixel 110 connected to S1. That is, if the target grayscale of the pth subpixel 110 connected to S1 is equal to the target grayscale of the j+1th subpixel 110 connected to S1, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the pth subpixel 110 connected to S1 to be equal to the emission luminance of the light-emitting element 210 corresponding to the j+1th subpixel 110 connected to S1 when the jth subpixel 110 connected to S1 does not emit light. Here, the color of the pth subpixel 110 connected to the first data line 130 is the same as that of the j+1th subpixel 110 connected to the i-th data line 130.

[0051] 1 as an example, assume that all subpixels 110 emit light and that the target grayscales of the subpixels 110 are the same, i.e., the display panel 10 displays a monochrome image. In this case, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first subpixel 110 connected to S1 (the first subpixel 110 located in the first row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S5 when the first subpixel 110 connected to S5 does not emit light. Similarly, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S1 (the first subpixel 110 located in the third row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S5 when the first subpixel 110 connected to S5 does not emit light.

[0052] Note that this example is obtained by further expanding on Example 1. That is, in the example described above, the controller 220 controls so that, when the first subpixel 110 connected to S5 does not emit light, the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S5 is higher than the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S5 when the first subpixel 110 connected to S5 emits light. Furthermore, the controller 220 controls so that the emission luminance of the light-emitting element 210 corresponding to the first and second subpixels 110 connected to S1 is equal to the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S5 when the first subpixel 110 connected to S5 does not emit light.

[0053] Regarding the Mth data line 130 Referring to the display panel 10 shown in FIG. 1 , the Mth data line 130 (i.e., S10) is connected to the input terminal of the switch circuit 120 corresponding to the (M-1)th subpixel 110 located in the even-numbered rows (the second and fourth rows). When the display panel 10 displays one frame of an image, if all of the subpixels 110 connected to S10 emit light, the voltage at S10 is 0 before G2 outputs a scan signal. When G2 outputs a scan signal, S10 needs to output a data voltage (e.g., 7V) to the 9th subpixel 110 located in the second row. When G3 outputs a scan signal, S10 does not need to output a data voltage. When G4 outputs a scan signal, S10 needs to output a data voltage (e.g., 7V) to the 9th subpixel 110 located in the fourth row. That is, during the process in which G2 and G4 output scan signals, the voltage at S10 needs to rise from 0 to 7V. In other words, when the display panel 10 displays one frame of an image, if the p-th sub-pixel 110 connected to S10 emits light, the data voltage written to the p-th sub-pixel 110 connected to S10 must increase from 0 to 7 V. In this case, the p-th sub-pixel 110 connected to S10 may be insufficiently charged, which may result in a dim emission of light from the sub-pixel 110. p may be any positive integer.

[0054] Based on the above-described situation, when the controller 220 operates, if the target grayscale of the pth sub-pixel 110 connected to the Mth data line 130 is equal to the target grayscale of the j+1th sub-pixel 110 connected to the ith data line 130, the controller 220 controls the fourth emission luminance to be equal to the first emission luminance. Here, the fourth emission luminance is the emission luminance of the light-emitting element 210 corresponding to the pth sub-pixel 110 connected to the Mth data line 130. That is, if the target grayscale of the pth sub-pixel 110 connected to M data lines 130 is equal to the target grayscale of the j+1th sub-pixel 110 connected to the ith data line 130, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the pth sub-pixel 110 connected to the Mth data line 130 to be equal to the emission luminance of the light-emitting element 210 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 when the jth sub-pixel 110 connected to the ith data line 130 does not emit light. Here, the color of the p-th sub-pixel 110 connected to the M-th data line 130 is the same as that of the j+1-th sub-pixel 110 connected to the i-th data line 130 .

[0055] 1 as an example, assume that all subpixels 110 emit light and that the target grayscales of the subpixels 110 are the same, i.e., the display panel 10 displays a monochrome image. In this case, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first subpixel 110 connected to S10 (the ninth subpixel 110 located in the second row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S7 when the first subpixel 110 connected to S7 does not emit light. Similarly, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S10 (the ninth subpixel 110 located in the fourth row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the second subpixel 110 connected to S7 when the first subpixel 110 connected to S7 does not emit light.

[0056] Similarly, this example is obtained by further expanding on Example 1. That is, in the above example, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the second sub-pixel 110 connected to S7 so that, when the first sub-pixel 110 connected to S7 does not emit light, the emission luminance of the light-emitting element 210 corresponding to the second sub-pixel 110 connected to S7 is higher than the emission luminance of the light-emitting element 210 corresponding to the second sub-pixel 110 connected to S7 so that the first sub-pixel 110 connected to S7 emits light. Furthermore, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first and second sub-pixels 110 connected to S10 so that the emission luminance of the light-emitting element 210 corresponding to the second sub-pixel 110 connected to S7 is equal to the emission luminance of the light-emitting element 210 corresponding to the second sub-pixel 110 connected to S7 when the first sub-pixel 110 connected to S7 does not emit light.

[0057] This embodiment further achieves the purpose of increasing the emission brightness of the light-emitting element 210 corresponding to the sub-pixels 110 connected to the first data line 130 and the Mth data line 130 when the emission brightness of the sub-pixels 110 connected to the first data line 130 and the Mth data line 130 is relatively low, thereby further improving the brightness uniformity of the display panel 10.

[0058] The operation principle of the backlight module 20 will be further described below in the case where the light emission luminance of the first sub-pixel 110 connected to the ith data line 130 is low.

[0059] Example 4 Referring to the display panel 10 shown in FIG. 1, before G1 outputs a scan signal, the voltage at Si is 0. Therefore, when G1 outputs a scan signal and the first sub-pixel 110 connected to Si emits light, Si needs to output a data voltage (e.g., 7V) to the first sub-pixel 110 connected to Si. That is, when G1 outputs a scan signal, the voltage within Si needs to increase from 0 to 7V. In this case, the first sub-pixel 110 connected to Si may be insufficiently charged, which may result in a dim emission brightness of the sub-pixel 110.

[0060] Based on the above situation, when the controller 220 operates, if the target grayscale of the first subpixel 110 connected to Si is equal to the target grayscale of the j+1th subpixel 110 connected to Si, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first subpixel 110 connected to Si to be equal to the emission luminance of the light-emitting element 210 corresponding to the j+1th subpixel 110 connected to Si when the jth subpixel 110 connected to Si does not emit light. Here, the color of the first subpixel 110 connected to Si is the same as that of the j+1th subpixel 110 connected to the ith data line 130.

[0061] 1 as an example, assume that all subpixels 110 emit light and that the target grayscales of the subpixels 110 are the same, i.e., the display panel 10 displays a monochrome image. In this case, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first subpixel 110 connected to S3 (i.e., the third subpixel 110 located in the first row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the third subpixel 110 connected to S3 when the second subpixel 110 connected to S3 does not emit light. Similarly, the controller 220 controls the emission luminance of the light-emitting element 210 corresponding to the first subpixel 110 connected to S6 (i.e., the third subpixel 110 located in the first row) to be equal to the emission luminance of the light-emitting element 210 corresponding to the third subpixel 110 connected to S6 when the second subpixel 110 connected to S6 does not emit light.

[0062] In this embodiment, when the emission brightness of the first sub-pixel 110 connected to the i-th data line 130 is low, the emission brightness of the light-emitting element 210 corresponding to the first sub-pixel 110 connected to the i-th data line 130 is increased, thereby achieving the purpose of further improving the brightness uniformity of the display panel 10.

[0063] Example 5 An embodiment of the present disclosure further provides a display device 30, including a display panel 10 and a backlight module 20 according to any one of the above embodiments.

[0064] 6 is a structural schematic diagram of a display device according to Example 5 of the present disclosure. As shown in FIG. 6, the display panel 10 includes a plurality of sub-pixels 110 and a plurality of data lines 130, and each of the plurality of data lines 130 is connected to at least two of the plurality of sub-pixels 110.

[0065] The backlight module 20 includes a plurality of light-emitting elements 210 and a controller 220. The plurality of light-emitting elements 210 correspond one-to-one to the plurality of sub-pixels 110, thereby providing light sources for the plurality of sub-pixels 110 one-to-one. The controller 220 controls the emission brightness of each of the plurality of light-emitting elements 210. For the j+1-th sub-pixel 110 connected to the i-th data line 130 among M data lines 130 whose target grayscale is unchanged, when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the controller 220 controls the emission brightness of the light-emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 to be higher than the emission brightness of the light-emitting element 210 corresponding 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 emits light, where i is an integer greater than 1 and less than M, and j is a positive integer.

[0066] In some embodiments, the backlight module 20 further includes a plurality of driving circuits 230, each of which corresponds one-to-one to the plurality of light-emitting elements 210. Each of the plurality of driving circuits 230 has a first input terminal b connected to the output terminal a of the power source 32 and an output terminal d connected to the corresponding light-emitting element 210. The controller 220 is connected to the second input terminal e of each of the plurality of driving circuits 230, and controls the driving current output from each of the plurality of driving circuits 230 to the light-emitting element 210, thereby controlling the light-emitting brightness of each of the driving circuits 230 for the plurality of light-emitting elements 210.

[0067] In some embodiments, each of the plurality of driving circuits 230 includes a first transistor TFT1, a second transistor TFT2, and a capacitor C. The first transistor TFT1 has an input terminal connected to the output terminal a of the power source 32, an output terminal connected to the light-emitting element 210 corresponding to the driving circuit 230, and a control terminal connected to the output terminal of the second transistor TFT2. The capacitor C has a first electrode connected to the input terminal of the first transistor TFT1 and a second electrode connected to the control terminal of the first transistor TFT1. The second transistor TFT2 has an input terminal connected to the controller 220, and the controller 220 controls the voltage output to the input terminal of the second transistor TFT2, thereby controlling the driving current output by each of the plurality of driving circuits 230 to the corresponding light-emitting element 210.

[0068] In some embodiments, the controller 220 stores a first correspondence relationship between a target grayscale and a first voltage. When the jth subpixel 110 connected to the ith data line 130 does not emit light, the controller 220 obtains a corresponding first voltage from the first correspondence relationship based on the target grayscale of the j+1th subpixel 110 connected to the ith data line 130, and inputs a voltage to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th subpixel 110 connected to the ith data line 130 based on the first voltage. The controller 220 stores a second correspondence relationship between a target grayscale and a second voltage, and for any target grayscale, the corresponding first voltage in the first correspondence relationship is greater than the corresponding second voltage in the second correspondence relationship. When the jth sub-pixel 110 connected to the ith data line 130 emits light, the controller 220 obtains a corresponding second voltage from the second correspondence relationship based on the target gray scale of the j+1th sub-pixel 110 connected to the ith data line 130, and inputs a voltage to the input terminal of the second transistor TFT2 of the driving circuit 230 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 based on the second voltage.

[0069] In some embodiments, when the target grayscale is between 0 and 8, the difference between the first and second voltages increases by 0.15 volts for each grayscale increase. When the target grayscale is between 8 and 20, the difference between the first and second voltages increases by 0.02 volts for each grayscale increase. When the target grayscale is between 20 and 220, the difference between the first and second voltages increases by 0.01 volts for each grayscale increase. When the target grayscale is between 220 and 225, the difference between the first and second voltages increases by 0.02 volts for each grayscale increase. When the target grayscale is between 225 and 238, the difference between the first and second voltages increases by 0.03 volts for each grayscale increase. When the target grayscale is between 238 and 244, the difference between the first and second voltages increases by 0.04 volts for each grayscale increase. If the target grayscale is greater than 244 but less than or equal to 247, the difference between the first and second voltages increases by 0.05 volts for each grayscale increase. If the target grayscale is greater than 247 but less than or equal to 255, the difference between the first and second voltages increases by 0.06 volts for each grayscale increase.

[0070] In some embodiments, the controller 220 controls the light emission brightness of the light-emitting element 210 corresponding to the pth sub-pixel 110 connected to the first data line 130 so that, when the target grayscale of the pth sub-pixel 110 connected to the first data line 130 among the M data lines 130 is equal to the target grayscale of the j+1th sub-pixel 110 connected to the ith data line 130, the light emission brightness of the light-emitting element 210 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 is equal to the light emission brightness of the light-emitting element 210 corresponding to the j+1th sub-pixel 110 connected to the ith data line 130 when the jth sub-pixel 110 connected to the ith data line 130 does not emit light, where p is a positive integer, and the color of the pth sub-pixel 110 connected to the first data line 130 is the same as the j+1th sub-pixel 110 connected to the ith data line 130.

[0071] In some embodiments, the controller 220 controls the light emission brightness of the light-emitting element 210 corresponding to the p-th sub-pixel 110 connected to the M-th data line 130 so that, when the target grayscale of the p-th sub-pixel 110 connected to the M-th data line 130 is equal to the target grayscale of the j+1-th sub-pixel 110 connected to the i-th data line 130, the light emission brightness of the light-emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 is equal to the light emission brightness of the light-emitting element 210 corresponding 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, where p is a positive integer, and the color of the p-th sub-pixel 110 connected to the M-th data line 130 is the same as the color of the j+1-th sub-pixel 110 connected to the i-th data line 130.

[0072] In some embodiments, each light emitting element 210 of the plurality of light emitting elements 210 is one of a submillimeter light emitting diode and a micro light emitting diode.

[0073] In an embodiment of the present disclosure, the backlight module 20 includes a plurality of light emitting elements 210 and a controller 220. The plurality of light emitting elements 210 provide light sources for the plurality of sub-pixels 110 in a one-to-one correspondence, and the controller 220 controls the light emission brightness of each light emitting element 210. When the backlight module 20 operates, the controller 220 controls the light emission brightness of the light emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 such that, for the j+1-th sub-pixel 110 connected to the i-th data line 130 whose target grayscale remains unchanged, when the j-th sub-pixel 110 connected to the i-th data line 130 does not emit light, the light emission brightness of the light emitting element 210 corresponding to the j+1-th sub-pixel 110 connected to the i-th data line 130 is higher than the light emission brightness of the light emitting element 210 corresponding 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 emits light. That is, for the plurality of sub-pixels 110 connected to the ith data line 130, if the data line 130 does not need to charge one of the sub-pixels 110, when the next sub-pixel 110 emits light, the controller 220 will increase the light emission brightness of the light-emitting element 210 corresponding to the next sub-pixel 110, so that the actual gray scale of the next sub-pixel 110 can reach the target gray scale, and the brightness uniformity of the display device 30 can be improved.

[0074] In addition, in the case where the emission brightness of the sub-pixels 110 connected to the first data line 130 and the Mth data line 130 is low, the emission brightness of the light-emitting element 210 corresponding to the sub-pixels 110 connected to the first data line 130 and the Mth data line 130 is increased, thereby achieving the purpose of further improving the brightness uniformity of the display device 30.

[0075] The above embodiments are only for illustrating the technical solutions of the present disclosure, and are not intended to limit the same. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified or some technical features therein may be replaced with equivalents, and such modifications or replacements should be within the scope of protection of the present disclosure without departing from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of the embodiments of the present disclosure. (Other possible items) (Item 1) A backlight module for use in a display device (30) including a display panel (10) including a plurality of sub-pixels (110) and M (M is an integer greater than 3) data lines (130), each of the M data lines (130) being connected to at least two of the plurality of sub-pixels (110), The backlight module (20) includes a plurality of light emitting elements (210) that correspond one-to-one to the plurality of sub-pixels (110) to provide light sources for the plurality of sub-pixels (110), and a controller (220) that controls the light emission brightness of each of the plurality of light emitting elements (210), the controller 220 controls the first light-emitting luminance to be greater than the second light-emitting luminance when a target gray scale of the j+1 (j is a positive integer) sub-pixel 110 connected to the i (i is an integer greater than 1 and less than M) data line 130 among the M data lines 130 is unchanged; the first light-emitting luminance is the light-emitting luminance of the light-emitting element (210) corresponding 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 second light-emitting luminance is the light-emitting luminance of the light-emitting element (210) corresponding 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) emits light; Backlight module. (Item 2) The backlight module (20) further includes a plurality of driving circuits (230) corresponding to the plurality of light-emitting elements (210) one-to-one, and each of the plurality of driving circuits (230) has a first input terminal connected to an output terminal of a power source (32) and an output terminal connected to a corresponding light-emitting element (210); the controller (220) is connected to the second input terminal of each of the plurality of driving circuits (230), and controls the driving current output from each of the driving circuits (230) to the corresponding light-emitting element (210), thereby controlling the light-emitting brightness of each of the plurality of light-emitting elements (210); Item 1. The backlight module according to item 1. (Item 3) Each of the plurality of drive circuits (230) further includes a variable resistor connected to the controller (220); The controller (220) controls the magnitude of the resistance value of the variable resistor in each of the drive circuits (230), thereby controlling the magnitude of the drive current output by each of the drive circuits (230) to the corresponding light-emitting element (210). Item 2. The backlight module according to item 2. (Item 4) Each of the plurality of drive circuits (230) includes a first transistor, a second transistor, and a capacitor; The first transistor has an input terminal connected to the output terminal of the power supply (32), an output terminal connected to the light emitting element (210) corresponding to each of the driving circuits (230), and a control terminal connected to the output terminal of the second transistor; The capacitor has a first electrode connected to the input terminal of the first transistor and a second electrode connected to the control terminal of the first transistor; The second transistor has an input terminal connected to the controller (220), The controller (220) controls the voltage output to the input terminal of the second transistor, thereby controlling the driving current output from each driving circuit (230) to the corresponding light emitting element (210). Item 2. The backlight module according to item 2. (Item 5) The controller (220) stores a first correspondence relationship between a target gray scale and a first voltage; When the jth sub-pixel (110) connected to the ith data line (130) does not emit light, the controller (220) obtains a corresponding first voltage from the first correspondence relationship based on a target gray scale of the j+1th sub-pixel (110) connected to the ith data line (130), and inputs a voltage to an input terminal of a second transistor of the driving circuit (230) corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the first voltage; The controller (220) stores a second correspondence relationship between a target gray scale and a second voltage, and for any target gray scale, a corresponding first voltage in the first correspondence relationship is greater than a corresponding second voltage in the second correspondence relationship; When the jth sub-pixel (110) connected to the ith data line (130) emits light, the controller (220) obtains a corresponding second voltage from the second correspondence relationship based on a target gray scale of the j+1th sub-pixel (110) connected to the ith data line (130), and inputs a voltage to an input terminal of a second transistor of the driving circuit (230) corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the second voltage; Item 4. The backlight module according to item 4. (Item 6) In any one of the target gray scales, the corresponding first voltage in the first correspondence relationship is greater than the corresponding second voltage in the second correspondence relationship. Item 5. The backlight module according to item 5. (Item 7) When the target gray scale is greater than or equal to 0 and less than or equal to 8, the difference value between the first voltage and the second voltage increases by 0.15 volts for each gray scale increase; If the target gray scale is greater than 8 and is equal to or less than 20, the difference value between the first voltage and the second voltage increases by 0.02 volts for each gray scale increase; If the target gray scale is greater than 20 and is equal to or less than 220, the difference value between the first voltage and the second voltage increases by 0.01 volts for each gray scale increase; If the target grayscale is greater than 220 but less than or equal to 225, the difference between the first voltage and the second voltage increases by 0.02 volts for each grayscale increase; If the target grayscale is greater than 225 but less than or equal to 238, the difference value between the first voltage and the second voltage increases by 0.03 volts for each grayscale increase; If the target gray scale is greater than 238 but less than or equal to 244, the difference value between the first voltage and the second voltage increases by 0.04 volts for each gray scale increase; If the target grayscale is greater than 244 but less than or equal to 247, the difference between the first voltage and the second voltage increases by 0.05 volts for each grayscale increase; If the target grayscale is greater than 247 and less than or equal to 255, the difference between the first voltage and the second voltage increases by 0.06 volts for each grayscale increase. Item 7. The backlight module according to item 6. (Item 8) The plurality of sub-pixels (110) include an R sub-pixel (110), a G sub-pixel (110), and a B sub-pixel (110), The second light-emitting luminance corresponding to the case where the j+1-th sub-pixel (110) connected to the i-th data line (130) is one of the R sub-pixel (110), the G sub-pixel (110), and the B sub-pixel (110) is not equal to the second light-emitting luminance corresponding to the case where the j+1-th sub-pixel (110) connected to the i-th data line (130) is another one of the R sub-pixel (110), the G sub-pixel (110), and the B sub-pixel (110). Item 1. The backlight module according to item 1. (Item 9) The backlight module (20) further includes a plurality of driving circuits (230) corresponding to the plurality of light emitting elements (210) one-to-one; Each of the plurality of drive circuits (230) includes a first transistor, a second transistor, and a capacitor; The first transistor has an input terminal connected to the output terminal of the power source 32, an output terminal connected to the light emitting element 210 corresponding to each of the driving circuits 230, and a control terminal connected to the output terminal of the second transistor; The capacitor has a first electrode connected to the input terminal of the first transistor and a second electrode connected to the control terminal of the first transistor; The second transistor has an input terminal connected to the controller (220), The controller (220) controls the voltage output to the input terminal of the second transistor, thereby controlling the driving current output from each driving circuit (230) to the corresponding light emitting element (210). Item 9. The backlight module according to item 8. (Item 10) The controller (220) stores a first correspondence relationship between a target gray scale and a first voltage for each of the R sub-pixel (110), the G sub-pixel (110), and the B sub-pixel (110); When the jth sub-pixel (110) connected to the ith data line (130) does not emit light, the controller (220) obtains a first correspondence relationship corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the color of the j+1th sub-pixel (110) connected to the ith data line (130); obtains a corresponding first voltage from the first correspondence relationship corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on a target gray scale of the j+1th sub-pixel (110) connected to the ith data line (130); and inputs a voltage to an input terminal of a second transistor of the driving circuit (230) corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the first voltage; The controller (220) stores a second correspondence relationship between a target grayscale and a second voltage for each of the R subpixel (110), the G subpixel (110), and the B subpixel (110), and the first voltage corresponding to any of the target grayscales in the first correspondence relationship is greater than the second voltage corresponding to any of the target grayscales in the second correspondence relationship; When the jth sub-pixel (110) connected to the ith data line (130) emits light, the controller (220) obtains a second correspondence relationship corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the color of the j+1th sub-pixel (110) connected to the ith data line (130), obtains a corresponding second voltage from the second correspondence relationship corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on a target gray scale of the j+1th sub-pixel (110) connected to the ith data line (130), and inputs a voltage to the input terminal of the second transistor of the driving circuit (230) corresponding to the j+1th sub-pixel (110) connected to the ith data line (130) based on the second voltage. Item 10. The backlight module according to item 9. (Item 11) the controller (220) controls the third light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of the p-th sub-pixel (110) connected to a first data line (130) among the M data lines (130) is equal to a target gray scale of the j+1-th sub-pixel (110) connected to the i-th data line (130); the third light-emitting luminance is the light-emitting luminance of the light-emitting element (210) corresponding to the pth (p is a positive integer) sub-pixel (110) connected to the first data line (130); The color of the p-th sub-pixel (110) connected to the first data line (130) is the same as the color of the j+1-th sub-pixel (110) connected to the i-th data line (130). Item 1. The backlight module according to item 1. (Item 12) the controller (220) controls the fourth light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of the p-th sub-pixel (110) connected to the M-th data line (130) among the M data lines (130) is equal to a target gray scale of the j+1-th sub-pixel (110) connected to the i-th data line (130); the fourth light-emitting luminance is the light-emitting luminance of the light-emitting element (210) corresponding to the pth (p is a positive integer) sub-pixel (110) connected to the Mth data line (130); The color of the p-th sub-pixel (110) connected to the M-th data line (130) is the same as the color of the j+1-th sub-pixel (110) connected to the i-th data line (130). Item 1. The backlight module according to item 1. (Item 13) the controller (220) controls the emission brightness of the first sub-pixel (110) connected to the i-th data line (130) to be equal to the first emission brightness when the target gray scale of the first sub-pixel (110) connected to the i-th data line (130) among the M data lines (130) is equal to the target gray scale of the j+1-th sub-pixel (110) connected to the i-th data line (130); The color of the first sub-pixel (110) connected to the i-th data line (130) is the same as the color of the j+1-th sub-pixel (110) connected to the i-th data line (130). 13. The backlight module according to any one of items 1 to 12. (Item 14) Each of the plurality of light-emitting elements (210) is a submillimeter light-emitting diode or a micro light-emitting diode. 13. The backlight module according to any one of items 1 to 12. (Item 15) A display device including a display panel (10) and the backlight module (20) according to any one of items 1 to 14, The display panel (10) includes a plurality of sub-pixels (110) and M (M is an integer greater than 3) data lines (130), each of the M data lines (130) being connected to at least two sub-pixels (110) of the plurality of sub-pixels (110); Display device. (Item 16) The plurality of sub-pixels (110) are arranged in N rows and M-1 columns, and j is a positive integer equal to or less than N-1; The first data line (130) of the M data lines (130) is connected to the first sub-pixel (110) in the odd-numbered row, the Mth data line (130) of the M data lines (130) is connected to the (M-1)th sub-pixel (110) in the even-numbered row, and the i-th data line (130) is connected to the i-th sub-pixel (110) in the odd-numbered row and the i-1-th sub-pixel (110) in the even-numbered row. Item 16. The display device according to item 15. [Explanation of symbols]

[0076] 10 Display panel 110 subpixels 120 Switch Circuit 130 data line 140 scan lines 20 Backlight Module 210 Light-emitting element 220 Controller 230 Drive Circuit 30 Display device 32 Power supply

Claims

1. A backlight module for use in a display device including a display panel including a plurality of sub-pixels, M (M is an integer greater than 3) data lines, and a plurality of scanning lines, wherein each of the M data lines is connected to at least two of the plurality of sub-pixels, and when the display device displays an image of one frame, the plurality of scanning lines output scanning signals one by one starting from a first scanning line to control the plurality of sub-pixels to emit light, and during the output and control process, the polarity of the data voltage output from each data line with respect to a common voltage does not change, the backlight module includes a plurality of light emitting elements each corresponding to one of the plurality of sub-pixels to provide a light source for the sub-pixel; and a controller for controlling the light emission brightness of each of the plurality of light emitting elements, the controller controls the first emission luminance to be greater than the second emission luminance when a target gray scale of a j+1-th sub-pixel connected to an i-th data line (i is an integer greater than 1 and less than M) among the M data lines when the j-th sub-pixel connected to the i-th data line does not emit light and a target gray scale of a j+1-th sub-pixel connected to the i-th data line when the j-th sub-pixel connected to the i-th data line emits light are unchanged; the first emission luminance is the emission luminance of a light-emitting element 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 light emission luminance is the light emission luminance of a light emitting element 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; Backlight module.

2. The backlight module further includes a plurality of driving circuits corresponding to the plurality of light emitting elements one by one, and each of the plurality of driving circuits has a first input terminal connected to an output terminal of a power source and an output terminal connected to a corresponding light emitting element; The controller is connected to the second input terminal of each of the plurality of driving circuits, and controls the driving current output from each of the driving circuits to the corresponding light emitting element, thereby controlling the light emitting brightness of each of the plurality of light emitting elements. The backlight module according to claim 1 .

3. each of the plurality of drive circuits further includes a variable resistor connected to the controller; the controller controls the magnitude of the resistance value of the variable resistor in each of the drive circuits, thereby controlling the magnitude of the drive current output by each of the drive circuits to the corresponding light-emitting element. The backlight module according to claim 2 .

4. each of the plurality of drive circuits includes a first transistor, a second transistor, and a capacitor; the first transistor has an input terminal connected to the output terminal of the power supply, an output terminal connected to the light emitting element corresponding to each of the driving circuits, and a control terminal connected to the output terminal of the second transistor; The capacitor has a first electrode connected to the input terminal of the first transistor and a second electrode connected to the control terminal of the first transistor; the second transistor has an input terminal connected to the controller; the controller controls the voltage output to the input terminal of the second transistor, thereby controlling the driving current output from each of the driving circuits to the corresponding light emitting element; The backlight module according to claim 2 .

5. The controller stores a first correspondence relationship between a target gray scale and a first voltage; the controller, when the jth sub-pixel connected to the ith data line does not emit light, obtains a corresponding first voltage from the first correspondence relationship based on a target gray scale of the j+1th sub-pixel connected to the ith data line, and inputs a voltage to an input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the ith data line based on the first voltage; a second correspondence relationship between a target gray scale and a second voltage is stored in the controller, and a first voltage corresponding to any target gray scale in the first correspondence relationship is greater than a second voltage corresponding to any target gray scale in the second correspondence relationship; When the jth sub-pixel connected to the ith data line emits light, the controller obtains a corresponding second voltage from the second correspondence relationship based on a target gray scale of the j+1th sub-pixel connected to the ith data line, and inputs a voltage to an input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the ith data line based on the second voltage. The backlight module according to claim 4 .

6. In any one of the target gray scales, the corresponding first voltage in the first correspondence relationship is greater than the corresponding second voltage in the second correspondence relationship. The backlight module according to claim 5 .

7. When the target gray scale is greater than or equal to 0 and less than or equal to 8, the difference value between the first voltage and the second voltage increases by 0.15 volts for each gray scale increase; If the target gray scale is greater than 8 but less than or equal to 20, the difference value between the first voltage and the second voltage increases by 0.02 volts for each gray scale increase; If the target gray scale is greater than 20 and is equal to or less than 220, the difference value between the first voltage and the second voltage increases by 0.01 volts for each gray scale increase; If the target gray scale is greater than 220 but less than or equal to 225, the difference between the first voltage and the second voltage increases by 0.02 volts for each gray scale increase; If the target gray scale is greater than 225 and equal to or less than 238, the difference value between the first voltage and the second voltage increases by 0.03 volts for each gray scale increase; If the target gray scale is greater than 238 but less than or equal to 244, the difference between the first voltage and the second voltage increases by 0.04 volts for each gray scale increase; If the target gray scale is greater than 244 but less than or equal to 247, the difference between the first voltage and the second voltage increases by 0.05 volts for each gray scale increase; If the target grayscale is greater than 247 and less than or equal to 255, the difference between the first voltage and the second voltage increases by 0.06 volts for each grayscale increase. The backlight module according to claim 6 .

8. the plurality of sub-pixels include an R sub-pixel, a G sub-pixel, and a B sub-pixel; A second light-emitting luminance corresponding to a case where the j+1-th subpixel connected to the i-th data line is one of the R subpixel, the G subpixel, and the B subpixel is not equal to a second light-emitting luminance corresponding to a case where the j+1-th subpixel connected to the i-th data line is another one of the R subpixel, the G subpixel, and the B subpixel. The backlight module according to claim 1 .

9. The backlight module further includes a plurality of driving circuits, each of which corresponds to one of the plurality of light emitting elements; each of the plurality of drive circuits includes a first transistor, a second transistor, and a capacitor; The first transistor has an input terminal connected to an output terminal of a power supply, an output terminal connected to a light emitting element corresponding to each of the driving circuits, and a control terminal connected to the output terminal of the second transistor; The capacitor has a first electrode connected to the input terminal of the first transistor and a second electrode connected to the control terminal of the first transistor; the second transistor has an input terminal connected to the controller; the controller controls the voltage output to the input terminal of the second transistor, thereby controlling the driving current output from each of the driving circuits to the corresponding light emitting element; The backlight module according to claim 8 .

10. the controller stores a first correspondence relationship between a target gray scale and a first voltage for each of the R subpixel, the G subpixel, and the B subpixel; When the jth sub-pixel connected to the ith data line does not emit light, the controller obtains a first correspondence relationship corresponding to the j+1th sub-pixel connected to the ith data line according to a color of the j+1th sub-pixel connected to the ith data line; obtains a corresponding first voltage from the first correspondence relationship corresponding to the j+1th sub-pixel connected to the ith data line according to a target gray scale of the j+1th sub-pixel connected to the ith data line; and inputs a voltage to an input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the ith data line according to the first voltage; the controller stores second correspondence relationships between target grayscales and second voltages for the R subpixel, the G subpixel, and the B subpixel, respectively, and for any target grayscale, a corresponding first voltage in the first correspondence relationship is greater than a corresponding second voltage in the second correspondence relationship; When the jth sub-pixel connected to the i-th data line emits light, the controller obtains a second correspondence relationship corresponding to the j+1th sub-pixel connected to the i-th data line based on a color of the j+1th sub-pixel connected to the i-th data line, obtains a corresponding second voltage from the second correspondence relationship corresponding to the j+1th sub-pixel connected to the i-th data line based on a target gray scale of the j+1th sub-pixel connected to the i-th data line, and inputs a voltage to an input terminal of a second transistor of a driving circuit corresponding to the j+1th sub-pixel connected to the i-th data line based on the second voltage. The backlight module according to claim 9 .

11. the controller controls the third light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of a p-th sub-pixel connected to a first data line among the M data lines is equal to a target gray scale of a j+1-th sub-pixel connected to the i-th data line; the third light-emitting luminance is the light-emitting luminance of a light-emitting element corresponding to a p-th sub-pixel (p is a positive integer) connected to the first data line; a color of the p-th sub-pixel connected to the first data line is the same as a color of the j+1-th sub-pixel connected to the i-th data line; The backlight module according to claim 1 .

12. the controller controls the fourth light-emitting luminance to be equal to the first light-emitting luminance when a target gray scale of a p-th sub-pixel connected to an M-th data line among the M data lines is equal to a target gray scale of a j+1-th sub-pixel connected to the i-th data line; the fourth light emission luminance is the light emission luminance of a light emitting element corresponding to a pth sub-pixel (p is a positive integer) connected to the Mth data line; the color of the p-th sub-pixel connected to the M-th data line is the same as the color of the j+1-th sub-pixel connected to the i-th data line; The backlight module according to claim 1 .

13. the controller controls the emission luminance of the first sub-pixel connected to the i-th data line to be equal to the first emission luminance when a target gray scale of the first sub-pixel connected to the i-th data line among the M data lines is equal to a target gray scale of the j+1-th sub-pixel connected to the i-th data line; a color of the first sub-pixel connected to the i-th data line is the same as a color of the j+1-th sub-pixel connected to the i-th data line; The backlight module according to claim 1 .

14. Each of the plurality of light-emitting elements is one of a submillimeter light-emitting diode and a micro light-emitting diode. The backlight module according to claim 1 .

15. A display device comprising a display panel and the backlight module according to any one of claims 1 to 14, the display panel includes a plurality of sub-pixels, M (M is an integer greater than 3) data lines, and a plurality of scanning lines, each of which is connected to at least two of the plurality of sub-pixels; when the display device displays an image of one frame, the plurality of scanning lines output scanning signals one by one starting from a first scanning line to control the plurality of sub-pixels to emit light; and during the output and control process, the polarity of the data voltage output from each data line with respect to a common voltage does not change. Display device.

16. The plurality of sub-pixels are arranged in N rows and M-1 columns, and j is a positive integer equal to or less than N-1. a first data line of the M data lines is connected to a first subpixel in an odd-numbered row, an M-th data line of the M data lines is connected to an (M-1)-th subpixel in an even-numbered row, and the i-th data line is connected to an i-th subpixel in an odd-numbered row and an i-1-th subpixel in an even-numbered row; The display device according to claim 15.

Images