Display module, display control method thereof, and display device

Abstract

The application provides a display module, a display control method thereof and a display device. The effective pulse of the backlight control signal corresponding to each backlight partition is overlapped with the effective pulse of the scanning signal transmitted by the scanning line electrically connected with the plurality of sub-pixels corresponding to the backlight partition, and the transition along the second direction of the two backlight partitions adjacent to each other and electrically connected to the same backlight driving module is corresponded, so that the backlight sources included in the two backlight partitions adjacent to each other and electrically connected to the same backlight driving module can be turned on at the moment when the backlight sources included in one backlight partition are turned off, thereby cooperating with the scanning signal received by the plurality of sub-pixels corresponding to each backlight partition, so that the plurality of backlight sources included in each backlight partition can provide backlight for the corresponding plurality of sub-pixels when the corresponding plurality of sub-pixels enter the row scanning charging state, and then the pixel voltage difference corresponding to the plurality of backlight partitions is reduced, and the water wave problem is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display control method and a display device. Background Technology

[0002] Display devices utilize liquid crystal display panels paired with sub-millimeter light-emitting diodes (LEDs) that enable local dimming as backlighting to achieve ultra-high contrast. Liquid crystal display panels are often manufactured using a cost-effective four-stage photomask module process. However, due to process defects such as a-Si tailing (i.e., the metal layers protruding from both ends of the single-crystal silicon layer), when pulse width modulation (PWM) is used for backlight dimming, the display panel exhibits horizontal bright-dark band variations when displaying low grayscale images, resulting in a water ripple effect.

[0003] Specifically, the 4-mask module process suffers from a-Si tailing due to the reduction of one mask. When the backlight uses pulse width modulation to achieve dimming, the backlight has two states: on and off (e.g., Figure 1A As shown). Because a-Si is a semiconductor material (such as... Figures 1B-1C The As layer in a-Si has different electron mobilities in the backlight-on and backlight-off states, resulting in different equivalent liquid crystal capacitances (e.g., the As layer in a-Si). Figures 1B-1C The difference in Cpd (as shown) causes a difference in the voltage of the liquid crystal pixels when the backlight is on and off, resulting in a difference in liquid crystal deflection and causing horizontal bright and dark band variations in the displayed image (i.e., the water ripple problem, such as...). Figure 1D (As shown), it affects the display quality. Summary of the Invention

[0004] This invention provides a display control method and display device that can improve the problem of water ripples on the display.

[0005] This invention provides a display module, including a display panel and a backlight module. The display panel includes multiple sub-pixels, multiple scan lines, and multiple data lines. The multiple sub-pixels are electrically connected to the multiple scan lines and the multiple data lines. Each scan line extends along a first direction, and each data line extends along a second direction. The backlight module has multiple backlight zones, and each backlight zone includes multiple backlight sources. The backlight module includes multiple backlight driving modules, and each backlight driving module includes multiple output channels. Each output channel is configured to output a backlight control signal to the multiple backlight sources of a corresponding backlight zone. The multiple backlight sources included in each backlight zone are configured to provide backlight to multiple rows of sub-pixels according to the corresponding backlight control signal. The effective pulse of the backlight control signal corresponding to each backlight partition overlaps with the effective pulse of the scan signal transmitted by the scan line electrically connected to the plurality of sub-pixels corresponding to the backlight partition; the plurality of backlight partitions include a first sub-region and a second sub-region that are adjacent along the second direction and electrically connected to the same backlight driving module, and the falling edge of the backlight control signal received by the plurality of backlight sources located in the first sub-region corresponds to the rising edge of the backlight control signal received by the plurality of backlight sources located in the second sub-region.

[0006] Optionally, in some embodiments, each of the backlight driving modules includes m output channels. The first to the m / 2th output channels of each backlight driving module are electrically connected to a plurality of backlight partitions adjacent along the first direction, and the (m / 2)+1th to the mth output channels are electrically connected to a plurality of backlight partitions adjacent along the first direction. Wherein, the backlight partitions electrically connected to the first output channel and the backlight partitions electrically connected to the (m / 2)+1th output channel are adjacent along the second direction; m>1.

[0007] Optionally, in some embodiments, the phase difference of the backlight control signals corresponding to two backlight partitions that are adjacent along the first direction and electrically connected to the same backlight driving module is T / m; where T represents the period corresponding to the backlight control signal.

[0008] Optionally, in some embodiments, the phase difference between the backlight control signals corresponding to two backlight partitions that are adjacent along the second direction and electrically connected to the same backlight driving module is T / 2.

[0009] Optionally, in some embodiments, the display module further includes a control module electrically connected to the plurality of backlight driving modules, the control module being configured to control the phase difference between the backlight control signals output by two adjacent output channels of the plurality of backlight driving modules to be T / m.

[0010] Optionally, in some embodiments, the control module includes a register for configuring the phase delay of a plurality of backlight control signals output by each of the backlight driving modules.

[0011] Optionally, in some embodiments, the plurality of backlight driving modules includes a first backlight driving module and a second backlight driving module. The m / 2th output channel of the first backlight driving module is adjacent to the first output channel of the second backlight driving module along the first direction, and the mth output channel of the first backlight driving module is adjacent to the (m / 2)+1th output channel of the second backlight driving module along the first direction.

[0012] Optionally, in some embodiments, the plurality of backlight zones include a second sub-zone and a third sub-zone that are adjacent along the second direction and electrically connected to different backlight driving modules, wherein the falling edge of the backlight control signal received by the plurality of backlight sources located in the second sub-zone corresponds to the rising edge of the backlight control signal received by the plurality of backlight sources located in the third sub-zone.

[0013] Embodiments of the present invention also provide a display control method for a display module, used in any of the above-described display modules. The display control method includes: controlling a plurality of output channels of at least one of the backlight driving modules to output a plurality of backlight control signals to a plurality of backlight zones according to a vertical synchronization signal. Specifically, the effective pulse of the backlight control signal corresponding to each backlight zone overlaps with the effective pulse of the scan signal transmitted by the scan lines electrically connected to the plurality of sub-pixels corresponding to the backlight zone; the falling edge of the backlight control signal received by a plurality of backlight sources located in the first sub-region corresponds to the rising edge of the backlight control signal received by a plurality of backlight sources located in the second sub-region.

[0014] Embodiments of the present invention also provide a display device, the display device comprising any of the above-described display modules.

[0015] This invention provides a display module, a display control method, and a display device. By overlapping the effective pulses of the backlight control signal corresponding to each backlight zone with the effective pulses of the scan signals transmitted through scan lines electrically connected to multiple sub-pixels corresponding to the backlight zone, when multiple sub-pixels receive the corresponding scan signals and enter the line scan charging state, multiple backlight sources included in the backlight zones corresponding to the multiple sub-pixels provide backlight to the multiple sub-pixels according to the corresponding backlight control signals. By making the transition edges of two backlight zones adjacent along a second direction and electrically connected to the same backlight driving module correspond, the backlight sources included in the two backlight zones adjacent along the second direction and electrically connected to the same backlight driving module can turn on the backlight source included in the other backlight zone when the backlight source included in one backlight zone is off. This, in conjunction with the scan signals received by the multiple sub-pixels corresponding to each backlight zone, ensures that the multiple backlight sources included in each backlight zone provide backlight to the corresponding multiple sub-pixels when the corresponding multiple sub-pixels enter the line scan charging state, thereby reducing the pixel voltage difference among the multiple backlight zones and improving the water ripple problem. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A This is a schematic diagram of dimming achieved using a pulse width modulation method according to an embodiment of the present invention;

[0018] Figure 1B This is a schematic diagram of the equivalent liquid crystal capacitance when the backlight is turned on, provided in an embodiment of the present invention.

[0019] Figure 1C This is a schematic diagram of the equivalent liquid crystal capacitance when the backlight is off, provided in an embodiment of the present invention.

[0020] Figure 1D This is a schematic diagram illustrating the display of water ripples provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the display module provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the sub-pixel structure provided in an embodiment of the present invention;

[0023] Figure 4 This is a timing diagram of the backlight control signals corresponding to the first and second sub-regions provided in the embodiments of the present invention;

[0024] Figures 5A-5B This is a schematic diagram of the mapping relationship between backlight partitions and output channels provided in an embodiment of the present invention;

[0025] Figures 6A to 6C This is a timing diagram of the backlight control signal provided in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0028] Specifically, Figures 1B-1C In this context, ITO corresponds to the layer where the electrode is located, Cu corresponds to the layer where the electrode or signal line is located, and n+ corresponds to the doped layer.

[0029] Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention. The present invention provides a display module including a display panel 10 and a backlight module 20.

[0030] Optionally, the display panel 10 includes a passive light-emitting display panel. Optionally, the display panel 10 includes a liquid crystal display panel, etc.

[0031] The display panel 10 includes multiple sub-pixels Spx, multiple scan lines SL, and multiple data lines DL.

[0032] The multiple sub-pixels Spx are electrically connected to the multiple scan lines SL and the multiple data lines DL.

[0033] Figure 3 This is a schematic diagram of the structure of a sub-pixel provided in an embodiment of the present invention. Optionally, at least one of the sub-pixels Spx includes a driving transistor Tdr, a liquid crystal capacitor Cpd, a storage capacitor Cst, a pixel electrode PE, a common electrode CE, and liquid crystal (not shown in the figure).

[0034] The control terminal of the driving transistor Tdr is electrically connected to the corresponding scan line SL, the input terminal of the driving transistor Tdr is electrically connected to the corresponding data line DL, and the output terminal of the driving transistor Tdr is electrically connected to the corresponding pixel electrode PE.

[0035] The liquid crystal capacitor Cpd is formed by the pixel electrode PE, the common electrode CE, and the liquid crystal.

[0036] Optionally, the two electrodes of the storage capacitor Cst can be formed by the pixel electrode PE and the common trace CE1, or by the pixel electrode PE and the corresponding scan line SL.

[0037] Optionally, the display panel 10 includes an array substrate and a color filter substrate disposed opposite to the array substrate. The liquid crystal is disposed between the array substrate and the color filter substrate, the pixel electrode PE is disposed on the array substrate side, and the common electrode CE may be disposed on the color filter substrate side.

[0038] Optionally, in some embodiments, the two electrodes of the storage capacitor Cst are formed by the common trace CE1 and the pixel electrode PE disposed on the array substrate, respectively.

[0039] Optionally, in some embodiments, the two electrodes of the storage capacitor Cst are formed by the scan line SL and the pixel electrode PE disposed on the array substrate, respectively.

[0040] Please continue reading. Figure 2 Each scan line SL extends along a first direction d1, and multiple scan lines SL are arranged along a second direction d2. The multiple scan lines SL are configured to transmit multiple scan signals. The first direction d1 and the second direction d2 are intersecting.

[0041] Each of the data lines DL extends along the second direction d2, and multiple data lines DL are arranged along the first direction d1. The multiple data lines DL are configured to transmit multiple data signals.

[0042] The backlight module 20 has multiple backlight zones BA, and each backlight zone BA includes multiple backlight sources.

[0043] Optionally, the backlight source can be a light-emitting device. Optionally, the backlight source includes sub-millimeter light-emitting diodes, micro light-emitting diodes, etc.

[0044] The backlight module 20 includes multiple backlight driver module ICs, each of which includes multiple output channels. Each output channel is configured to output a backlight control signal to multiple backlight sources of a corresponding backlight partition BA. The multiple backlight sources of each backlight partition BA are configured to provide backlight to multiple rows of sub-pixels Sp according to the corresponding backlight control signal.

[0045] In this configuration, the effective pulse of the backlight control signal corresponding to each backlight partition BA overlaps with the effective pulse of the scan signal transmitted by the scan line SL electrically connected to the plurality of sub-pixels Spx corresponding to the backlight partition BA. The plurality of backlight partitions BA include a first sub-region BA1 and a second sub-region BA2 that are adjacent along the second direction d2 and electrically connected to the same backlight driving module IC. The falling edge of the backlight control signal received by the plurality of backlight sources located in the first sub-region BA1 corresponds to the rising edge of the backlight control signal received by the plurality of backlight sources located in the second sub-region BA2, i.e. Figure 4 This is a timing diagram of the backlight control signals corresponding to the first sub-region and the second sub-region provided in the embodiments of the present invention, wherein BCS1 represents the backlight control signal corresponding to the first sub-region and BCS2 represents the backlight control signal corresponding to the second sub-region.

[0046] By overlapping the effective pulse of the backlight control signal corresponding to each backlight partition BA with the effective pulse of the scan signal transmitted by the scan line SL electrically connected to the plurality of sub-pixels Spx corresponding to the backlight partition BA, when the plurality of sub-pixels Spx receive the corresponding scan signal to perform line scan charging, the plurality of backlight sources included in the backlight partition BA corresponding to the plurality of sub-pixels Spx can provide backlight to the plurality of sub-pixels Spx. By making the first sub-region BA1 and the second sub-region BA2 adjacent along the second direction d2 and electrically connected to the same backlight driving module IC, the falling edge of the backlight control signal received by the multiple backlight sources in the first sub-region BA1 and the rising edge of the backlight control signal received by the multiple backlight sources in the second sub-region BA2, when the multiple backlight sources included in the first sub-region BA1 stop providing backlight to the corresponding sub-pixel Sp according to the corresponding backlight control signal, the multiple backlight sources included in the second sub-region BA2 start providing backlight to the corresponding sub-pixel Sp according to the corresponding backlight control signal. This is in conjunction with the scanning signals received by the multiple sub-pixels Sp corresponding to the first sub-region BA1 and the multiple sub-pixels Sp corresponding to the second sub-region BA2, so that the multiple backlight sources included in the first sub-region BA1 are positioned at the multiple sub-pixels Sp corresponding to the first sub-region BA1. When a pixel (px) enters the line scan charging state, it provides backlight to the corresponding plurality of sub-pixels (Spx). This ensures that the multiple backlight sources included in the second sub-region BA2 provide backlight to the corresponding plurality of sub-pixels (Spx) only when they enter the line scan charging state. This reduces the pixel voltage difference between the multiple sub-pixels (Spx) and improves the problem of large pixel voltage differences causing display ripples, where some backlight zones BA are turned on when their corresponding sub-pixels enter the line scan charging state, while others are turned off.

[0047] Figures 5A-5B This is a schematic diagram illustrating the mapping relationship between backlight zones and output channels provided in an embodiment of the present invention. Figures 6A to 6CThis is a timing diagram of the backlight control signal provided in an embodiment of the present invention. The following explanation, based on the mapping relationship between backlight partitions (BA) and output channels, and the timing of the backlight control signal, uses an example where multiple backlight driver module ICs include a first backlight driver module IC1, each of which includes 32 output channels. The example demonstrates how a first sub-region BA1 and a second sub-region BA2, adjacent along the second direction d2 and electrically connected to the same backlight driver module IC, are electrically connected to two output channels of the first backlight driver module IC1.

[0048] Please continue reading. Figure 5A and Figure 6A The first backlight driving module IC1 outputs 32 backlight control signals (IC1_1 to IC1_32) through its 32 output channels (IC11 to IC132). Since these 32 backlight control signals are identical, the backlight control signals received by the multiple backlight sources within the first sub-region BA1 (e.g., the backlight partition BA corresponding to the multiple backlight sources receiving the backlight control signal IC1_1 output from the first output channel IC11 of the first backlight driving module IC1) are the same as those received by the multiple backlight sources within the second sub-region BA2 (e.g., the multiple backlight sources receiving the backlight control signal IC1_32 output from the 32nd output channel IC132 of the first backlight driving module IC1). The backlight control signals received by the multiple backlight sources included in the backlight zone BA (which is the second sub-zone BA2) are the same. This causes the multiple backlight sources included in the first sub-zone BA1 to provide backlight to the multiple sub-pixels Spp corresponding to the first sub-zone BA1 when they enter the line scan charging state. However, the multiple backlight sources included in the second sub-zone BA2 do not provide backlight to the multiple sub-pixels Spp corresponding to the second sub-zone BA2 when they enter the line scan charging state. This results in a large difference between the pixel voltage of the multiple sub-pixels Spp corresponding to the first sub-zone BA1 and the pixel voltage of the multiple sub-pixels Spp corresponding to the second sub-zone BA2, leading to a water ripple problem on the display.

[0049] Understandable, Figure 5AIn the mapping relationship shown, the first sub-region BA1 can also be a backlight partition BA corresponding to the multiple backlight sources that receive the backlight control signal IC1_2 output by the second output channel IC12 of the first backlight driver module IC1; the second sub-region BA2 can also be a backlight partition BA corresponding to the multiple backlight sources that receive the backlight control signal IC1_31 output by the 31st output channel IC131 of the first backlight driver module IC1. Similarly, the definitions of the first sub-region BA1 and the second sub-region BA2 corresponding to different output channels of the first backlight driver module IC1 can also be obtained. Similarly, the definitions of the first sub-region BA1 and the second sub-region BA2 corresponding to different output channels of other backlight driver module ICs can also be obtained.

[0050] Please continue reading. Figure 4 and Figure 5B The falling edge of the backlight control signal (BCS1) received by the plurality of backlight sources included in the first sub-region BA1 corresponds to the rising edge (BCS2) of the backlight control signal received by the plurality of backlight sources included in the second sub-region BA2. Therefore, the plurality of backlight sources included in the first sub-region BA1 provide backlight to the corresponding plurality of sub-pixels Spx when the plurality of sub-pixels Spx corresponding to the first sub-region BA1 enters the line scan charging state. When the plurality of backlight sources included in the first sub-region BA1 stop providing backlight to the corresponding plurality of sub-pixels Spx, the plurality of backlight sources included in the second sub-region BA2 provide backlight to the corresponding plurality of sub-pixels Spx, and the plurality of backlight sources included in the second sub-region BA2 also provide backlight to the corresponding plurality of sub-pixels Spx when the plurality of sub-pixels Spx corresponding to the second sub-region BA2 enters the line scan charging state. Therefore, the total liquid crystal capacitance Cpd of the multiple sub-pixels Spx corresponding to the first sub-region BA1 and the total liquid crystal capacitance Cpd of the multiple sub-pixels Spx corresponding to the second sub-region BA2 tend to be consistent, and the pixel voltage of the multiple sub-pixels Spx corresponding to the first sub-region BA1 and the pixel voltage of the multiple sub-pixels Spx corresponding to the second sub-region BA2 are relatively small, which can improve the water ripple problem that appears in the display.

[0051] Optionally, the falling edge of the backlight control signal received by the multiple backlight control signals output by each of the backlight driving module ICs can be controlled to correspond to the rising edge of the backlight control signal received by the multiple backlight sources included in the first sub-region BA1, by adjusting the phase difference between them.

[0052] Understandably, the multiple backlight zones BA may include multiple first sub-zones BA1 and second sub-zones BA2 corresponding to the first sub-zones BA1. Accordingly, the falling edge of the backlight control signal received by the multiple first sub-zones BA1 corresponds to the rising edge of the backlight control signal received by the second sub-zones BA2 corresponding to the first sub-zones BA1, which helps to improve the effect of reducing the water ripple problem in the display.

[0053] Alternatively, please continue reading Figure 2 The display module further includes a control module 30, which is electrically connected to a plurality of backlight driving module ICs. The control module 30 is configured to control the phase difference between the backlight control signals output by the output channels of the plurality of backlight driving module ICs, so that the falling edge of the backlight control signal received by the plurality of first sub-regions BA1 corresponds to the rising edge of the backlight control signal received by the second sub-region BA2 corresponding to the first sub-region BA1.

[0054] Optionally, the control module 30 includes a register for configuring the phase delay of a plurality of backlight control signals output by each of the backlight driving module ICs.

[0055] Optionally, the control module 30 includes a timing controller, etc.

[0056] Optionally, to reduce control complexity, the mapping relationship between the backlight partition BA and the output channel can be adjusted, and the phase difference between the multiple backlight control signals output by each of the backlight driver module ICs can be adjusted so that the falling edge of the backlight control signal received by the multiple first sub-region BA1 corresponds to the rising edge of the backlight control signal received by the second sub-region BA2 corresponding to the first sub-region BA1.

[0057] Optionally, each of the backlight driving module ICs includes m output channels. The first to the m / 2th output channels of each of the backlight driving module ICs are electrically connected to a plurality of backlight partitions BA adjacent along the first direction d1, and the (m / 2)+1th to the mth output channels are electrically connected to a plurality of backlight partitions BA adjacent along the first direction d1. Wherein, the backlight partition BA electrically connected to the first output channel and the backlight partition BA electrically connected to the (m / 2)+1th output channel are adjacent along the second direction d2, such that each first sub-region BA1 and the corresponding second sub-region BA2 are spaced apart by the m / 2th backlight partition BA. This allows the control module 30 to set the same configuration for the multiple output channels corresponding to at least one backlight driving module IC, and to maintain a consistent phase difference between the multiple backlight control signals output by the multiple output channels. This ensures that the falling edge of the backlight control signal received by the multiple first sub-regions BA1 corresponds to the rising edge of the backlight control signal received by the second sub-region BA2 corresponding to the first sub-region BA1, while reducing control complexity. Wherein, m > 1.

[0058] For example, the first to the m / 2th output channels of the first backlight driver module IC1 control the first to the m / 2th backlight partitions of the first row, and the (m / 2)+1th to the mth output channels of the first backlight driver module IC1 control the first to the m / 2th backlight partitions of the second row. Taking an example where the first backlight driver module IC1 has 32 output channels, the first to the 16th output channels IC116 of the first backlight driver module IC1 control the first to the 16th backlight partitions of the first row, and the 17th to the 32nd output channels IC132 of the first backlight driver module IC1 control the first to the 16th backlight partitions of the second row. Figure 5B As shown.

[0059] Optionally, in some embodiments, phase control is performed on the backlight control signals output by multiple output channels of the same backlight driver module IC according to the period corresponding to the backlight control signal. For example, the phase difference between the backlight control signals corresponding to two backlight partitions BA that are adjacent along the first direction d1 and electrically connected to the same backlight driver module IC is T / m. Wherein, T represents the period corresponding to the backlight control signal.

[0060] Optionally, in some embodiments, the control module 30 is configured to control the phase difference between the backlight control signals output by two adjacent output channels of the plurality of backlight driving module ICs to be T / m.

[0061] Accordingly, the phase difference between the backlight control signals of the two backlight partitions BA that are adjacent along the second direction d2 and electrically connected to the same backlight driving module IC is T / 2, so that the phase difference between the effective pulse of the backlight control signal received by the plurality of first sub-regions BA1 and the effective pulse of the backlight control signal received by the second sub-region BA2 corresponding to the first sub-region BA1 is T / 2.

[0062] Please continue reading. Figure 5B and Figure 6B Taking the first backlight driver module IC1 having 32 output channels as an example, where the first output channel IC11 to the 16th output channel IC116 of the first backlight driver module IC1 controls the first to the 16th backlight zones of the first row, and the 17th output channel IC117 to the 32nd output channel IC132 of the first backlight driver module IC1 controls the first to the 16th backlight zones of the second row, the following explanation is provided. Specifically, if the backlight zones BA where the multiple backlight sources are located, corresponding to the backlight control signal IC1_1 output by the first output channel IC11 of the first backlight driver module IC1, are designated as the first sub-region BA1, then the backlight zones BA where the multiple backlight sources are located, corresponding to the backlight control signal IC1_17 output by the 17th output channel IC117 of the first backlight driver module IC1, are designated as the second sub-region BA2. If the backlight partition BA corresponding to the backlight control signal IC1_2 output by the second output channel IC12 of the first backlight driver module IC1 is designated as the first sub-region BA1, then the backlight partition BA corresponding to the backlight control signal IC1_18 output by the eighteenth output channel IC118 of the first backlight driver module IC1 is designated as the second sub-region BA2. Similarly, the definitions of different output channels of different backlight driver module ICs corresponding to the first sub-region BA1 and the second sub-region BA2 can also be obtained.

[0063] Specifically, the control module 30 divides the period of the backlight control signal output by the first backlight driver module IC1 into 32 equal parts, such that the rising edge of the backlight control signal IC1_2 output by the second output channel IC12 of the first backlight driver module IC1 is delayed by T / 32 compared to the rising edge of the backlight control signal IC1_1 output by the first output channel IC11 of the first backlight driver module IC1, and the rising edge of the backlight control signal IC1_3 output by the third output channel IC13 of the first backlight driver module IC1 is delayed by T / 32 compared to the rising edge of the backlight control signal IC1_1 output by the first output channel IC11 of the first backlight driver module IC1. The rising edge of signal IC1_1 is delayed by T / 16, and so on. The rising edge of the backlight control signal IC1_17 output by the 17th output channel IC117 of the first backlight driver module IC1 is delayed by T / 2 compared to the rising edge of the backlight control signal IC1_1 output by the 1st output channel IC11 of the first backlight driver module IC1. Similarly, the rising edge of the backlight control signal IC1_32 output by the 32nd output channel IC132 of the first backlight driver module IC1 is delayed by 31T / 32 compared to the rising edge of the backlight control signal IC1_1 output by the 1st output channel IC11 of the first backlight driver module IC1. Accordingly, the minimum duty cycle needs to be greater than T / 32 so that in two adjacent rows of backlight partitions BA controlled by the same backlight driver module IC, the next row of backlight partitions BA and the previous row of backlight partitions BA have a T / 2 delay phase misalignment, so that the total capacitance of the multiple sub-pixels Spx corresponding to each row of backlight partitions BA tends to be consistent, thus improving the water ripple problem.

[0064] Optionally, in some embodiments, the pulse width of the effective pulse of the backlight control signal may not be equal to T / 2, but the pulse width of the effective pulse of the multiple backlight control signals output by each backlight driver module IC is the same. Therefore, phase control can be performed on the backlight control signals output by multiple output channels of the same backlight driver module IC based on the pulse width duration of the effective pulse of the backlight control signal output by the first output channel of the backlight driver module IC. For example, if the phase difference of the backlight control signals corresponding to two backlight partitions BA that are adjacent along the first direction d1 and electrically connected to the same backlight driver module IC is 2W / m, then the phase difference of the backlight control signals corresponding to two backlight partitions BA that are adjacent along the second direction d2 and electrically connected to the same backlight driver module IC is W. Wherein, W represents the pulse width duration of the effective pulse of the backlight control signal output by the first output channel of the backlight driver module IC.

[0065] Optionally, when the pulse width of the effective pulse in the backlight control signal may not be equal to T / 2, the line scanning speed of the sub-pixel Spx can be adjusted to improve the water ripple problem of the display panel 10.

[0066] Optionally, in some embodiments, multiple backlight partitions (BAs) can be arrayed, with adjacent backlight partitions (BAs) having partially connected output channels of different backlight driver module ICs. For example, the multiple backlight driver module ICs may include a first backlight driver module IC1 and a second backlight driver module IC2. The backlight partition (BA) corresponding to the m / 2th output channel of the first backlight driver module IC1 is adjacent to the backlight partition (BA) corresponding to the 1st output channel of the second backlight driver module IC2 along the first direction d1; the backlight partition (BA) corresponding to the mth output channel of the first backlight driver module IC1 is adjacent to the backlight partition (BA) corresponding to the (m / 2)+1th output channel of the second backlight driver module IC2 along the first direction d1.

[0067] Optionally, each of the backlight driver module ICs includes m output channels. The first to the m / 2th output channels of the first backlight driver module IC1 control the first to the m / 2th backlight partitions BA in the x-th row. The (m / 2)+1th to the m-th output channels of the first backlight driver module IC1 control the first to the m / 2th backlight partitions BA in the x+1th row. The first to the m / 2th output channels of the second backlight driver module IC2 control the (m / 2)+1th to the m-th backlight partitions BA in the first row. The (m / 2)+1th to the m-th output channels of the first backlight driver module IC1 control the (m / 2)+1th to the m-th backlight partitions BA in the second row. Where x > 0.

[0068] Please continue reading. Figure 5B Each of the backlight driver module ICs includes 32 output channels. The first output channel IC11 to the 16th output channel IC116 of the first backlight driver module IC1 controls the first to the 16th backlight zones of the first row. The 17th output channel IC117 to the 32nd output channel IC132 of the first backlight driver module IC1 controls the first to the 16th backlight zones of the second row. The first output channel IC21 to the 16th output channel IC216 of the second backlight driver module IC2 controls the 17th to the 32nd backlight zones of the first row. The 17th output channel IC217 to the 32nd output channel IC232 of the second backlight driver module IC2 controls the 17th to the 32nd backlight zones of the second row.

[0069] Optionally, in some embodiments, since the display panel 10 is relatively large, multiple light panels can be used to provide backlighting for the multiple sub-pixels Spx of the display panel 10. Accordingly, each light panel may include at least one backlight zone BA.

[0070] Optionally, the multiple backlight zones BA corresponding to the first backlight driver module IC1 and the multiple backlight zones BA corresponding to the second backlight driver module IC2 may be located on different lamp boards.

[0071] Alternatively, please continue reading Figure 2 , Figure 4 and Figure 5B In some embodiments, the multiple backlight zones BA include a second sub-zone BA2 and a third sub-zone BA3 that are adjacent along the second direction d2 and electrically connected to different backlight driving module ICs. The falling edge of the backlight control signal (i.e., BCS2) received by the multiple backlight sources located in the second sub-zone BA2 corresponds to the rising edge of the backlight control signal (i.e., BCS3) received by the multiple backlight sources located in the third sub-zone BA3, so that the multiple backlight control signals output by each backlight driving module IC are synchronized, reducing control complexity. This also ensures that when the multiple backlight sources included in the second sub-zone BA2 stop providing backlight to the corresponding multiple sub-pixels Spx, the multiple backlight sources included in the third sub-zone BA3 provide backlight to the corresponding multiple sub-pixels Spx. Furthermore, the multiple backlight sources included in the third sub-zone BA3 also provide backlight to the corresponding multiple sub-pixels Spx when the multiple sub-pixels Spx corresponding to the third sub-zone BA3 enter the line scan charging state, improving the water ripple problem that appears on the display. Here, BCS3 is the backlight control signal corresponding to the third sub-zone BA3.

[0072] Please continue reading. Figure 5B and Figure 6C The following example illustrates the backlight module 20, which has 384 backlight zones (BA) and includes 12 backlight driver modules (ICs) (i.e., the first backlight driver module IC1 to the twelfth backlight driver module IC12), with each IC including 32 output channels.

[0073] The first output channel IC11 to the 16th output channel IC116 of the first backlight driver module IC1 controls the first to 16th backlight zones of the first row. The 17th output channel IC117 to the 32nd output channel IC132 of the first backlight driver module IC1 controls the first to 16th backlight zones of the second row. The first output channel IC21 to the 16th output channel IC216 of the second backlight driver module IC2 controls the 17th to 32nd backlight zones of the first row. The 17th output channel IC217 to the 32nd output channel IC232 of the second backlight driver module IC2 controls the 17th to 32nd backlight zones of the second row. The first output channel IC31 to the sixteenth output channel IC316 of the third backlight driver module IC3 controls the first to sixteenth backlight zones of the third row. The seventeenth output channel IC317 to the thirty-second output channel IC332 of the third backlight driver module IC3 controls the first to sixteenth backlight zones of the fourth row. The first output channel IC41 to the sixteenth output channel IC416 of the fourth backlight driver module IC4 controls the seventeenth to thirty-second backlight zones of the third row. The seventeenth output channel IC417 to the thirty-second output channel IC432 of the fourth backlight driver module IC4 controls the seventeenth to thirty-second backlight zones of the fourth row. Similarly, the first to sixteenth output channels of the eleventh backlight driver module IC11, IC111 to IC1116, control the first to sixteenth backlight zones in the eleventh row. The seventeenth to thirty-second output channels of the eleventh backlight driver module IC11, IC1117 to IC1132, control the first to sixteenth backlight zones in the twelfth row. The first to sixteenth output channels of the twelfth backlight driver module IC12, IC121 to IC1216, control the seventeenth to thirty-second backlight zones in the eleventh row. The seventeenth to thirty-second output channels of the twelfth backlight driver module IC12, IC1217 to IC1232, control the seventeenth to thirty-second backlight zones in the twelfth row.

[0074] The falling edge of the backlight control signal received by the multiple backlight sources included in the second sub-region BA2 (e.g., the backlight partition BA where the multiple backlight sources are located, which corresponds to the backlight control signal IC1_17 output by the 17th output channel IC117 of the first backlight driver module IC1 is the second sub-region BA2) corresponds to the rising edge of the backlight control signal received by the multiple backlight sources included in the third sub-region BA3 (e.g., the backlight partition BA where the multiple backlight sources are located, which corresponds to the backlight control signal IC3_1 output by the 1st output channel IC31 of the third backlight driver module IC3 is the third sub-region BA3).

[0075] It is understandable that, referring to the example of the backlight partition BA where the multiple backlight sources are located corresponding to the backlight control signal IC1_17 output by the 17th output channel IC117 of the first backlight driver module IC1 being designated as the second sub-region BA2, and the backlight partition BA where the multiple backlight sources are located corresponding to the backlight control signal IC3_1 output by the 1st output channel IC31 of the third backlight driver module IC3 being designated as the third sub-region BA3, the definitions of the different output channels of different backlight driver module ICs corresponding to the second sub-region BA2 and the third sub-region BA3 can also be obtained.

[0076] Optionally, the first backlight driver module IC1, the third backlight driver module IC3, the fifth backlight driver module IC5, the seventh backlight driver module IC7, the ninth backlight driver module IC9, and the eleventh backlight driver module IC11 control multiple backlight zones BA on the same lamp board, and the second backlight driver module IC2, the fourth backlight driver module IC4, the sixth backlight driver module IC6, the eighth backlight driver module IC8, the tenth backlight driver module IC10, and the twelfth backlight driver module IC12 control multiple backlight zones BA on the same lamp board, wherein the backlight zones BA controlled by the first backlight driver module IC1 and the second backlight driver module IC2 are located on different lamp boards.

[0077] Optionally, the multiple sub-pixels Spx corresponding to each backlight partition BA can be located in different rows.

[0078] Embodiments of the present invention also provide a display control method for a display module, used in any of the aforementioned display modules. The display control method includes: controlling at least one of the backlight driving module IC's multiple output channels to output multiple backlight control signals to multiple backlight zones BA according to a vertical synchronization signal Vsync. Specifically, the effective pulse of the backlight control signal corresponding to each backlight zone BA overlaps with the effective pulse of the scan signal transmitted by the scan line SL electrically connected to the multiple sub-pixels Spx corresponding to the backlight zone BA; the falling edge of the backlight control signal received by the multiple backlight sources located in the first sub-zone BA1 corresponds to the rising edge of the backlight control signal received by the multiple backlight sources located in the second sub-zone BA2, so that when the display panel 10 displays according to the vertical synchronization signal, the multiple backlight sources included in the backlight module 20 are controlled to turn on or off according to the corresponding backlight control signal, in order to coordinate with the row scanning action of the multiple sub-pixels Spx and improve the problem of water ripples appearing on the display. The timing diagram of the vertical synchronization signal Vsync and the multiple backlight control signals can be referred to... Figures 6A to 6C As shown.

[0079] Optionally, the control module 30 can be used to control the backlight module 20 to output multiple backlight control signals to multiple backlight zones BA according to the vertical synchronization signal Vsync.

[0080] Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. An embodiment of the present invention also provides a display device, which includes any of the above-described display modules.

[0081] Optionally, the display device includes a computer, a mobile phone, etc.

[0082] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display module, characterized by include: The display panel includes multiple sub-pixels, multiple scan lines, and multiple data lines. The multiple sub-pixels are electrically connected to the multiple scan lines and the multiple data lines. Each scan line extends along a first direction, and each data line extends along a second direction. A backlight module has multiple backlight zones, each backlight zone including multiple backlight sources. The backlight module includes multiple backlight driving modules, each backlight driving module including multiple output channels. Each output channel is configured to output a backlight control signal to the multiple backlight sources of a corresponding backlight zone. The multiple backlight sources included in each backlight zone are configured to provide backlight to multiple rows of sub-pixels according to the corresponding backlight control signal. The effective pulse of the backlight control signal corresponding to each backlight partition overlaps with the effective pulse of the scan signal transmitted by the scan line electrically connected to the plurality of sub-pixels corresponding to the backlight partition; the plurality of backlight partitions include a first sub-region and a second sub-region that are adjacent along the second direction and electrically connected to the same backlight driving module, and the falling edge of the backlight control signal received by the plurality of backlight sources located in the first sub-region corresponds to the rising edge of the backlight control signal received by the plurality of backlight sources located in the second sub-region.

2. The display module according to claim 1, characterized in that, Each of the backlight driving modules includes m output channels. The first to the second (m / 2)th output channels of each backlight driving module are electrically connected to a plurality of backlight zones adjacent to each other along the first direction. The (m / 2)+1th to the mth output channels are electrically connected to a plurality of backlight zones adjacent to each other along the first direction. Wherein, the backlight partition electrically connected to the first output channel and the backlight partition electrically connected to the (m / 2)+1th output channel are adjacent along the second direction, and m>1.

3. The display module according to claim 2, characterized in that, The phase difference of the backlight control signals corresponding to the two backlight partitions that are adjacent along the first direction and electrically connected to the same backlight driving module is T / m; where T represents the period corresponding to the backlight control signal.

4. The display module according to claim 3, characterized in that, The phase difference between the backlight control signals of the two backlight partitions that are adjacent along the second direction and electrically connected to the same backlight driving module is T / 2.

5. The display module according to claim 3, characterized in that, Also includes: The control module, electrically connected to the plurality of backlight driving modules, is configured to control the phase difference between the backlight control signals output by two adjacent output channels of the plurality of backlight driving modules to be T / m.

6. The display module according to claim 5, characterized in that, The control module includes a register for configuring the phase delay of a plurality of backlight control signals output by each of the backlight driving modules.

7. The display module according to claim 2, characterized in that, The plurality of backlight driving modules include a first backlight driving module and a second backlight driving module; The backlight partition corresponding to the m / 2th output channel of the first backlight driving module is adjacent to the backlight partition corresponding to the first output channel of the second backlight driving module along the first direction; The backlight partition corresponding to the mth output channel of the first backlight driving module is adjacent to the backlight partition corresponding to the (m / 2)+1th output channel of the second backlight driving module along the first direction.

8. The display module according to claim 1, characterized in that, The plurality of backlight zones include a second sub-zone and a third sub-zone that are adjacent along the second direction and electrically connected to different backlight driving modules. The falling edge of the backlight control signal received by the plurality of backlight sources located in the second sub-zone corresponds to the rising edge of the backlight control signal received by the plurality of backlight sources located in the third sub-zone.

9. A display control method for a display module, characterized in that, For a display module as described in any one of claims 1 to 8, the display control method includes: According to the vertical synchronization signal, at least one of the backlight driving modules controls multiple output channels to output multiple backlight control signals to multiple backlight zones; wherein, the effective pulse of the backlight control signal corresponding to each backlight zone overlaps with the effective pulse of the scan signal transmitted by the scan line electrically connected to the multiple sub-pixels corresponding to the backlight zone; the falling edge of the backlight control signal received by the multiple backlight sources located in the first sub-region corresponds to the rising edge of the backlight control signal received by the multiple backlight sources located in the second sub-region.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 8.

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