WO2022047922A1 - mini LED背光模组的驱动方法 - Google Patents

mini LED背光模组的驱动方法 Download PDF

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Publication number
WO2022047922A1
WO2022047922A1 PCT/CN2020/123161 CN2020123161W WO2022047922A1 WO 2022047922 A1 WO2022047922 A1 WO 2022047922A1 CN 2020123161 W CN2020123161 W CN 2020123161W WO 2022047922 A1 WO2022047922 A1 WO 2022047922A1
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Prior art keywords
partition
subfield
time
backlight module
led backlight
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PCT/CN2020/123161
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English (en)
French (fr)
Inventor
陈小龙
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Tcl华星光电技术有限公司
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Priority to US17/054,739 priority Critical patent/US11694642B2/en
Publication of WO2022047922A1 publication Critical patent/WO2022047922A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0204Compensation of DC component across the pixels in flat panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/064Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12Test circuits or failure detection circuits included in a display system, as permanent part thereof

Definitions

  • the present application relates to the field of display technology, and in particular, to a method for driving a mini LED backlight module.
  • LCD Liquid Crystal Display, liquid crystal display
  • HDR High-Dynamic Range, high dynamic range image
  • the traditional mini LED backlight adopts the static drive or PM (Passive Matrix, passive matrix) drive scheme to realize the backlight Local Dimming. Since each partition needs to be controlled by a separate data line, the number of partitions is generally less than 2000. The number of required driving ICs (integrated circuits, integrated circuits) is too large, resulting in high product cost.
  • PM Passive Matrix, passive matrix
  • the mini LED backlight driving method based on AM has become a solution to effectively reduce the number of LED driver chips to reduce costs.
  • SMT Surface Mounted Technology, surface mount technology
  • mini LED backlight to reduce the cost
  • the size of the single backlight panel is also getting larger and larger, which makes the resistance and capacitance loading (RC Loading) of the data line at the far and near ends inconsistent.
  • RC Loading resistance and capacitance loading
  • the RC Loading at the near end of the data line is relatively Small
  • the RC Loading at the far end of the data line is large, and with the effects of resistance voltage drop (IR drop), the brightness of the mini LED backlight board will be different at the far and near ends of the data line.
  • IR drop resistance voltage drop
  • the part near the near end of the data line is brighter, and the part near the far end of the data line is darker, which leads to the display problem of uneven brightness and darkness of the mini LED backlight board, which seriously affects the quality of the backlight.
  • the embodiment of the present application provides a driving method for a mini LED backlight module, so as to solve the technical problem of uneven brightness and darkness of the mini LED backlight panel due to inconsistent RC Loading of data lines at the far and near ends in the existing mini LED backlight module.
  • the application provides a driving method for a mini LED backlight module, comprising the following steps:
  • Step S100 Divide the mini LED backlight module into M partitions in turn along the first direction, wherein the mini LED backlight module includes a control unit and a data line connected to the control unit, and the first direction In the direction in which the data line extends from an end close to the control unit to an end far away from the control unit, the M partitions include a first partition, a second partition ... the Mth partition arranged in sequence along the first direction -1 partition, Mth partition;
  • Step S200 Divide the period of each frame of the mini LED backlight module into an adjustment subfield and N display subfields, and drive the mini LED backlight module to emit light, wherein, in the adjustment time of the adjustment subfield Inside, the data line outputs a low potential to the part of the mini LED backlight module located in the first partition, and the data line outputs a high voltage to the part of the mini LED backlight module located in the Mth partition potential; according to the brightness value of the first partition and the brightness value of the Mth partition, adjust the size of the adjustment subfield to obtain the brightness difference between the first partition and the Mth partition within the first brightness threshold range The adjustment time T of the adjustment subfield corresponding to the inner time is adjusted ;
  • Step S300 Divide the adjustment subfield corresponding to each partition into a bright subfield and a dark subfield, wherein, within the time of the bright subfield corresponding to any one of the partitions, the data lines The part of the mini LED backlight module located in the partition outputs a high potential, and within the time of the dark subfield corresponding to any of the partitions, the data line is located in the mini LED backlight module in the Some parts in the partition output low potential;
  • the mini LED backlight module is driven to emit light in different gray-scale modes, and in each gray-scale mode, according to the brightness value of each of the sub-areas, the bright subfield or the The size of the dark subfield, to obtain the time of the bright subfield and the dark subfield corresponding to when the luminance difference between each of the sub-regions and the first sub-region is within the range of the second luminance threshold in the grayscale mode the time of the venue;
  • Step S400 Drive the mini LED backlight module to emit light according to the time of the bright subfield and the time of the dark subfield corresponding to each of the partitions under different grayscale modes.
  • the size of the adjustment subfield is adjusted according to the brightness value of the first partition and the brightness value of the Mth partition to obtain Adjusting the adjustment time T of the adjustment subfield corresponding to when the difference in brightness between the first partition and the Mth partition is within the first brightness threshold range, includes:
  • the regulator When the brightness difference between the first partition and the Mth partition is outside the range of the first brightness threshold and the brightness value of the first partition is greater than the brightness value of the Mth partition, the regulator is increased.
  • the adjustment time of the field; or when the luminance difference between the first subarea and the Mth subarea is outside the first luminance threshold range and the luminance value of the first subarea is smaller than the luminance value of the Mth subarea reduce the adjustment time of the adjustment sub-field; drive the mini LED backlight module to emit light, wherein, during the adjustment time of the adjustment sub-field after the increase or decrease, the data line is used for the mini LED backlight module.
  • a part of the group located in the first partition outputs a low potential, and the data line outputs a high potential to a part of the mini LED backlight module located in the Mth partition; or
  • the adjustment time T of the adjustment subfield corresponding to the process of driving the mini LED backlight module this time is obtained.
  • each time driving the mini LED backlight module to emit light includes: calculating the time of each of the display subfields:
  • T 1 (1/f-T tone )/(2 N -1)
  • T1 is the time of the first display subfield
  • Tn is the time of the nth display subfield
  • 2 ⁇ n ⁇ N is the display frequency of the mini LED backlight module.
  • the time of each increase is T adjustment ;
  • the time of each reduction is T adjustment
  • T increase T decrease .
  • the adjustment subfield corresponding to each of the partitions is divided into a bright subfield and a dark subfield:
  • the time of the bright subfield corresponding to the first partition is 0, and the time of the bright subfield corresponding to the Mth partition is equal to the time of the adjustment subfield.
  • the time of the bright subfield corresponding to the sub-area that is close to the control unit is shorter than the time of the bright sub-field that is far away from the control unit The time of the transom field corresponding to the partition.
  • the step S300 in each of the gray-scale modes, according to the brightness value of each of the sub-regions, the corresponding parts of each of the sub-regions are adjusted respectively.
  • the size of the bright subfield or the dark subfield to obtain the brightness difference of the bright subfield corresponding to the brightness difference between the sub-region and the first sub-region in the second brightness threshold range in the grayscale mode time and the time of the dark subfield, including:
  • the mini LED backlight module Drive the mini LED backlight module to emit light in the Lth grayscale mode, wherein the grayscale value corresponding to the Lth grayscale mode is L, 0 ⁇ L ⁇ 2N - 1, and the mini LED backlight module
  • the number of the grayscale modes of the group is 2N ;
  • the size of the bright subfield or the dark subfield corresponding to each of the subregions is adjusted according to the brightness value of each of the subregions, so as to obtain the The time of the bright subfield and the time of the dark subfield corresponding to the luminance difference between the sub-area and the first sub-area are within the range of the second luminance threshold.
  • step S300 driving the mini LED backlight module to emit light in different grayscale modes, including:
  • the gray-scale value in the gray-scale mode used in the next time is subtracted from the gray-scale value in the gray-scale mode used in the previous time.
  • the grayscale value is the adjustment step grayscale S.
  • the bright subfield or the dark subfield corresponding to each of the sub-regions is adjusted according to the brightness value of each of the sub-regions.
  • the size of the subfield in order to obtain the time of the bright subfield and the dark subfield corresponding to the luminance difference between the partition and the first partition in the Lth grayscale mode when the luminance difference is within the second luminance threshold range Field time, including:
  • the luminance difference between the first sub-area and the m-th sub-area is outside the second luminance threshold range and the luminance value of the first sub-area is greater than the m-th sub-area
  • the time of the bright subfield corresponding to the mth partition is increased or the time of the dark subfield corresponding to the mth partition is decreased; or when the first partition and the
  • the brightness difference value of the m partition is outside the range of the second brightness threshold and the brightness value of the first partition is smaller than the brightness value of the m th partition, the brightness of the bright subfield corresponding to the m th partition is decreased. time or increase the time of the dark subfield corresponding to the mth partition; according to the adjusted time of the bright subfield corresponding to the mth partition and the dark subfield corresponding to the mth partition field time, driving the mini
  • the LED backlight module emits light in the Lth gray scale mode
  • the initial value of the partition number m is set to 2;
  • the partition number of the partition adjusted in the second time is larger than the partition number of the partition adjusted in the previous time.
  • the present application divides the mini LED backlight module into a plurality of partitions along the extending direction of the data line, and divides the adjustment subfield in the period of each frame of the mini LED backlight module, according to different gray levels
  • the order mode adjust the size of the bright subfield or the dark subfield in the adjustment subfields corresponding to different partitions, so that the brightness displayed by each partition is within a set brightness threshold range, so as to realize the display brightness of the mini LED backlight module. homogenization.
  • FIG. 1 is a schematic structural diagram of the area division of a mini LED backlight module in an embodiment of the application
  • FIG. 2 is a schematic block diagram of a process flow of a method for driving a mini LED backlight module according to an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a logical structure of a method for driving a mini LED backlight module in an embodiment of the present application.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present application, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the present application provides a method for driving a mini LED backlight module, as shown in Figures 1 to 3, comprising the following steps:
  • Step S100 Divide the mini LED backlight module into M partitions in turn along the first direction 100, wherein the mini LED backlight module includes a control unit and a data line 10 connected to the control unit, the first A direction 100 is a direction in which the data line 10 extends from an end close to the control unit to an end far from the control unit, and the M partitions include a first partition, a second partition and a second partition arranged in sequence along the first direction 100 .
  • the second partition ...the M-1th partition, the Mth partition;
  • the first direction 100 is the direction away from the control unit. Specifically, the further the mini LED in the mini LED backlight module is farther away from the control unit, the corresponding required data line 10 The longer the length is, the larger the RC Loading is, and the brightness of the mini LED backlight module at the far and near ends of the data cable 10 will be different.
  • the mini LED backlight module is divided in sequence along the first direction 100 is M partitions, and the M partitions include the first partition, the second partition, the M-1th partition, and the Mth partition arranged in sequence along the first direction 100.
  • the closest distance to the control unit is The first partition, that is, the data line 10 connected between the mini LED in the first partition and the control unit is the shortest, on the contrary, the Mth partition is the farthest away from the control unit, and the The data line 10 connected between the mini LED in the M partition and the control unit is the longest. Therefore, the mini LED backlight module is divided into M partitions in turn along the first direction 100, which is convenient for each partition. control separately.
  • Step S200 Divide the period of each frame of the mini LED backlight module into an adjustment subfield and N display subfields, and drive the mini LED backlight module to emit light, wherein, in the adjustment time of the adjustment subfield Inside, the data line 10 outputs a low potential to the part of the mini LED backlight module located in the first partition, and the data line 10 outputs a low potential to the part of the mini LED backlight module located in the Mth partition Output a high potential; according to the brightness value of the first partition and the brightness value of the Mth partition, adjust the size of the adjustment subfield to obtain the brightness difference between the first partition and the Mth partition at the first brightness The adjustment time T of the corresponding adjustment subfield when within the threshold range is adjusted ;
  • Step S300 Divide the adjustment subfield corresponding to each partition into a bright subfield and a dark subfield, wherein, during the time of the bright subfield corresponding to any one of the partitions, the data lines 10 are connected to all the subfields.
  • the part of the mini LED backlight module located in the partition outputs a high potential, and within the time of the dark subfield corresponding to any of the partitions, the data line 10 is located in the mini LED backlight module in the Parts in the partition output a low potential;
  • the mini LED backlight module is driven to emit light in different gray-scale modes, and in each gray-scale mode, according to the brightness value of each of the sub-areas, the bright subfield or the The size of the dark subfield, to obtain the time of the bright subfield and the dark subfield corresponding to when the luminance difference between each of the sub-regions and the first sub-region is within the range of the second luminance threshold in the grayscale mode the time of the venue;
  • Step S400 Drive the mini LED backlight module to emit light according to the time of the bright subfield and the time of the dark subfield corresponding to each of the partitions under different grayscale modes.
  • the mini LED backlight driving method based on AM has become a solution to effectively reduce the number of LED driver chips to reduce costs.
  • AM Active Matrix
  • the size of the single backlight panel is also getting larger and larger, which makes the resistance-capacitive loading (RC Loading) of the data line 10 (data line) at the far and near ends inconsistent.
  • the data The RC Loading at the near end of the line 10 is smaller, and the RC Loading at the far end of the data line 10 is larger, and with the effects of resistance voltage drop (IR drop), the brightness of the mini LED backlight panel at the far and near ends of the data line 10 will be different.
  • the part near the near end of the data line 10 is brighter, and the part near the far end of the data line 10 is darker, which leads to the display problem of uneven brightness and darkness of the mini LED backlight panel, which seriously affects the backlight performance. quality.
  • the mini LED backlight module by dividing the mini LED backlight module into a plurality of partitions along the extending direction of the data line 10, and dividing the adjustment subfield in the period of each frame of the mini LED backlight module, according to different gray scale modes. In some cases, adjust the size of the bright subfield or the dark subfield in the adjustment subfields corresponding to different partitions, so that the brightness displayed by each partition is within a set brightness threshold range, so as to realize the uniformity of the display brightness of the mini LED backlight module. .
  • step S200 the period of each frame of the mini LED backlight module is divided into an adjustment subfield and N display subfields, and the adjustment subfield is used to adjust the mini LED backlight module.
  • the brightness and darkness of each frame displayed in the group are determined, and, in step S300, the adjustment subfield is divided into a bright subfield and a dark subfield.
  • the data line 10 A high potential is output during the period of the bright subfield, and a low potential is output during the period of the dark subfield, so that the regulators corresponding to the different partitions can be adjusted under the conditions of different gray scale modes.
  • the size of the bright subfield or the dark subfield in the field realizes the uniformity of the display brightness of the mini LED backlight module.
  • the specific structure is 1G1D
  • the frequency is 240Hz
  • N 6 bits
  • the mini LED backlight module of (bit) is taken as an example.
  • the period of each frame of the group is divided into an adjustment subfield and 6 display subfields.
  • the specific number of the gray-scale modes is 26 .
  • the size of the adjustment subfield is adjusted according to the luminance value of the first partition and the brightness value of the Mth partition to obtain Adjusting the adjustment time T of the adjustment subfield corresponding to when the difference in brightness between the first partition and the Mth partition is within the first brightness threshold range, includes:
  • the regulator When the brightness difference between the first partition and the Mth partition is outside the range of the first brightness threshold and the brightness value of the first partition is greater than the brightness value of the Mth partition, the regulator is increased.
  • the adjustment time of the field; or when the luminance difference between the first subarea and the Mth subarea is outside the first luminance threshold range and the luminance value of the first subarea is smaller than the luminance value of the Mth subarea reduce the adjustment time of the adjustment sub-field; drive the mini LED backlight module to emit light, wherein, during the adjustment time of the adjustment sub-field after the increase or decrease, the data line 10 is opposite to the mini LED backlight.
  • the part of the module located in the first partition outputs a low potential, and the data line 10 outputs a high potential to the part of the mini LED backlight module located in the Mth partition; or
  • the adjustment time T of the adjustment subfield corresponding to the process of driving the mini LED backlight module this time is obtained.
  • the data line 10 is adjusted to the mini LED within the adjustment time of the adjustment subfield.
  • the part of the LED backlight module located in the first partition outputs a low potential
  • the data line 10 outputs a high potential to the part of the mini LED backlight module located in the Mth partition, maximizing the reduction
  • the difference between the first partition and the Mth partition, and then adjusting the size of the adjustment subfield is more convenient to make the brightness difference between the first partition and the Mth partition within the first brightness threshold range , so that the adjustment time T of the adjustment subfield corresponding to the brightness difference between the first partition and the Mth partition is within the first brightness threshold range can be obtained conveniently and faster.
  • the mini LED backlight module is then re-driven to emit light with the adjusted adjustment time of the adjustment subfield.
  • the data line 10 outputs a low potential to the part of the mini LED backlight module located in the first sub-area, and the data line 10 outputs a low potential to the part of the mini LED backlight module located in the first sub-area.
  • the part in the Mth subarea outputs a high potential; until the luminance difference between the first subarea and the Mth subarea is within the first luminance threshold range.
  • each time before driving the mini LED backlight module to emit light includes: calculating the time of each of the display subfields:
  • T 1 (1/f-T tone )/(2 N -1)
  • T1 is the time of the first display subfield
  • Tn is the time of the nth display subfield
  • 2 ⁇ n ⁇ N is the display frequency of the mini LED backlight module.
  • the time of each increase is T adjustment ;
  • the time of each reduction is T adjustment
  • T increase T decrease .
  • the T increase and the T decrease may be equal or unequal.
  • the T increase and the T decrease are set equal, which is convenient for unification.
  • the difference between the T adjustment increase and the T adjustment decrease is too large.
  • the T adjustment increase and T adjustment can be specifically set according to specific conditions.
  • the adjustment subfield corresponding to each partition is divided into a bright subfield and a dark subfield:
  • the time of the bright subfield corresponding to the first partition is 0, and the time of the bright subfield corresponding to the Mth partition is equal to the time of the adjustment subfield.
  • the time of the adjustment subfield corresponding to any partition is equal to the sum of the time of the bright subfield and the time of the dark subfield, and the time of the bright subfield corresponding to the first partition is The time is set to 0, that is, the adjustment subfield corresponding to the first partition is all divided into the dark subfield, and the time of the bright subfield corresponding to the Mth partition is the same as the adjustment subfield. That is, the time of the dark subfield corresponding to the Mth subfield is 0, and the adjustment subfield corresponding to the Mth subfield is all divided into the bright subfield.
  • the time of the transom field corresponding to one of the partitions close to the control unit is shorter than the time of the bright subfield corresponding to the partition farther away from the control unit.
  • Leonon field time It can be understood that the closer to the control unit, the shorter the data line 10 connected between the mini LED in the partition and the control unit, the smaller the corresponding impact of RC Loading, therefore, whether it is the first time.
  • the adjustment subfield is divided into a bright subfield and a dark subfield, or when the bright subfield corresponding to each of the subregions is finally calculated, connecting the subregion with the shorter length of the data line 10, corresponding to the divided subregion.
  • the time of the brighton field is smaller.
  • the bright subfield corresponding to each of the sub-regions is adjusted according to the luminance value of each of the sub-regions. or the size of the dark subfield, to obtain the time and the corresponding time of the bright subfield when the luminance difference between each of the sub-regions and the first sub-region is within the range of the second luminance threshold in the grayscale mode.
  • Describe the time of the dark subfield including:
  • the mini LED backlight module Drive the mini LED backlight module to emit light in the Lth grayscale mode, wherein the grayscale value corresponding to the Lth grayscale mode is L, 0 ⁇ L ⁇ 2N - 1, and the mini LED backlight module
  • the number of the grayscale modes of the group is 2N ;
  • the size of the bright subfield or the dark subfield corresponding to each of the subregions is adjusted according to the brightness value of each of the subregions, so as to obtain the The time of the bright subfield and the time of the dark subfield corresponding to the luminance difference between the sub-area and the first sub-area are within the range of the second luminance threshold.
  • the number of the grayscale modes of the mini LED backlight module is 2 to 6
  • the grayscale value corresponding to the Lth grayscale mode is L, 0 ⁇ L ⁇ 2 N -1
  • the specific gray scale value L includes 0, 1...2 6 -2, 2 6 -1;
  • it is necessary to obtain each of the partitions and the first the time of the bright subfield and the time of the dark subfield corresponding to when the luminance difference value of the partition is within the range of the second luminance threshold, wherein, when the grayscale value is L 0, at this time, the The mini LED backlight module is in an all-black mode, so it is not necessary to calculate the time of the bright subfield and the time of the dark subfield corresponding to each of the partitions.
  • step S300 driving the mini LED backlight module to emit light in different grayscale modes, including:
  • the gray-scale value in the gray-scale mode used in the next time is subtracted from the gray-scale value in the gray-scale mode used in the previous time.
  • the grayscale value is the adjustment step grayscale S.
  • the initial value of the grayscale value L is set to 1, and each time the time of the bright subfield and the time of the dark subfield corresponding to each of the partitions in the grayscale mode are obtained, Then enter the next gray-scale mode, wherein, in the process of driving the mini LED backlight module to emit light in two adjacent gray-scale modes, the gray-scale value in the gray-scale mode adopted in the latter time decreases.
  • the grayscale value in the grayscale mode used last time is the adjustment step grayscale S; it is worth noting that a grayscale determination step is also included.
  • the size of the bright subfield or the dark subfield corresponding to each of the subregions is adjusted according to the brightness value of each of the subregions, so as to obtain the In the L gray scale mode, the time of the bright subfield and the time of the dark subfield corresponding to the difference between the brightness of each partition and the first partition are within the range of the second brightness threshold, including:
  • the luminance difference between the first sub-area and the m-th sub-area is outside the second luminance threshold range and the luminance value of the first sub-area is greater than the m-th sub-area
  • the luminance value is , the time of the bright subfield corresponding to the mth partition is increased or the time of the dark subfield corresponding to the mth partition is decreased; or when the first partition and the
  • the brightness difference value of the m partition is outside the range of the second brightness threshold and the brightness value of the first partition is smaller than the brightness value of the m th partition, the brightness of the bright subfield corresponding to the m th partition is decreased.
  • the mini LED backlight mode is re-driven.
  • the partition number of the partition adjusted in the second time is larger than the partition number of the partition adjusted in the previous time.
  • the initial value of the partition number m is set to 2, after each acquisition of the time of the bright subfield and the time of the dark subfield corresponding to the mth partition in the Lth grayscale mode, Then, obtain the time of the bright subfield and the dark subfield corresponding to the next partition. Specifically, adjust the bright subfield or the dark subfield corresponding to the different partitions twice adjacently. In the process of the size of the field, the partition number of the partition adjusted in the later time is 1 larger than the partition number of the partition adjusted in the previous time; it is worth noting that a partition determination step is also included.
  • the acquisition of each partition and the The time of the bright subfield and the time of the dark subfield corresponding to the luminance difference value of the first partition is within the range of the second luminance threshold.
  • the present application divides the mini LED backlight module into a plurality of partitions along the extending direction of the data line 10, and divides the adjustment subfield in the period of each frame of the mini LED backlight module, according to different gray levels
  • the mode adjust the size of the bright subfield or the dark subfield in the adjustment subfields corresponding to different partitions, so that the brightness displayed by each partition is within a set brightness threshold range, so as to realize the display brightness of the mini LED backlight module. homogenize.

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Abstract

一种mini LED背光模组的驱动方法,包括将mini LED背光模组沿数据线(10)延伸的方向划分为多个分区,并在mini LED背光模组每一帧的周期中划分出调节子场,根据不同灰阶模式的情况,调节不同分区对应的调节子场中亮子场或暗子场的大小,使得各分区显示的亮度在一设定的亮度阈值范围内。

Description

mini LED背光模组的驱动方法 技术领域
本申请涉及显示技术领域,尤其涉及一种mini LED背光模组的驱动方法。
背景技术
随着显示技术的发展,平板显示以其具有清晰度高、图像色彩好、省电、轻薄、便于携带等优点,已被广泛应用于信息显示产品中,具有广阔的市场前景。但随着面板产业驱动技术的日益成熟,机遇与挑战也随之而来,由于LCD(Liquid Crystal Display,液晶显示器)背光的局限性,如功耗大、对比度低等缺点,迫使背光朝着局部可控制(Local dimming)的方向发展,搭配mini LED背光模组能体现更好的对比度和HDR(High-Dynamic Range,高动态范围图像)显示效果。
传统的mini LED背光采用静态驱动或PM(Passive Matrix,被动矩阵式)驱动方案实现的背光Local Dimming,由于每一分区需要单独使用一根数据线(data line)控制,使得分区数量普遍低于2000个分区且所需驱动IC(integrated circuit,集成电路)的数量过多,造成产品成本较高。
技术问题
目前,基于AM(Active Matrix,主动矩阵式)的mini LED背光驱动方法成为一种有效减少LED驱动芯片数量以实现降低成本的方案,但随着SMT(Surface Mounted Technology,表面贴装技术)的发展及mini LED背光降低成本的需求,单背光灯板的尺寸也越来越大,使得数据线(data line)在远近端的电阻电容负载(RC Loading)不一致,具体的,数据线近端RC Loading较小,数据线远端RC Loading较大,且加上电阻压降(IR drop)等效应,导致mini LED背光灯板在数据线的远近端的亮度会有差异,具体到mini LED背光灯板中,靠近数据线近端的部分较亮,靠近数据线远端的部分较暗,从而导致mini LED 背光灯板亮暗不均的显示问题,严重影响背光的品质。
技术解决方案
本申请实施例提供一种mini LED背光模组的驱动方法,以解决现有mini LED背光模组中由于数据线在远近端的RC Loading不一致,导致mini LED背光灯板亮暗不均的技术问题。
为解决上述问题,本申请提供的技术方案如下:
本申请提供一种mini LED背光模组的驱动方法,包括以下步骤:
步骤S100:将所述mini LED背光模组沿第一方向依次划分为M个分区,其中,所述mini LED背光模组包括控制单元和与所述控制单元连接的数据线,所述第一方向为所述数据线由靠近所述控制单元的一端向远离所述控制单元的一端延伸的方向,所述M个分区包括沿所述第一方向依次排列的第一分区、第二分区…第M-1分区、第M分区;
步骤S200:将所述mini LED背光模组每一帧的周期划分为一调节子场和N个显示子场,驱动所述mini LED背光模组发光,其中,在所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的调节时间T
步骤S300:将每一所述分区对应的所述调节子场划分为亮子场和暗子场,其中,在任一所述分区所对应的所述亮子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出高电位,在任一所述分区所对应的所述暗子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出低电位;
驱动所述mini LED背光模组在不同灰阶模式下发光,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差 值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间;及
步骤S400:根据各所述分区在不同所述灰阶模式下所对应的所述亮子场的时间和所述暗子场的时间,驱动所述mini LED背光模组发光。
在本申请所提供mini LED背光模组的驱动方法中,在所述步骤S200中,根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的所述调节时间T ,包括:
当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间;或者当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间;驱动所述mini LED背光模组发光,其中,在增加或减少后的所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;或
当所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中对应的所述调节子场的调节时间T
在本申请所提供mini LED背光模组的驱动方法中,在所述步骤S200中,每一次驱动所述mini LED背光模组发光之前均包括:计算各所述显示子场的时间:
T 1=(1/f-T )/(2 N-1)
T n=2 n-1T 1
其中,T 1为第一显示子场的时间,T n为第n显示子场的时间,2≤n≤N,f为所述mini LED背光模组的显示频率。
在本申请所提供mini LED背光模组的驱动方法中,所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间中,每一 次增加的时间为T 调增
所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间中,每一次减少的时间为T 调减
其中,T 调增=T 调减
在本申请所提供mini LED背光模组的驱动方法中,在所述步骤S300中,将每一所述分区对应的所述调节子场划分为亮子场和暗子场中:
所述第1分区所对应的所述亮子场的时间为0,所述第M分区所对应的所述亮子场的时间与所述调节子场的时间相等。
在本申请所提供mini LED背光模组的驱动方法中,任意两所述分区中,其中一靠近所述控制单元的所述分区所对应的所述亮子场的时间小于另一远离所述控制单元的所述分区所对应的所述亮子场的时间。
在本申请所提供mini LED背光模组的驱动方法中,在所述步骤S300中,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
驱动所述mini LED背光模组在第L灰阶模式下发光,其中,所述第L灰阶模式所对应的灰阶值为L,0≤L≤2 N-1,所述mini LED背光模组的所述灰阶模式的数量为2 N个;
在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间。
在本申请所提供mini LED背光模组的驱动方法中,在所述步骤S300中,驱动所述mini LED背光模组在不同灰阶模式下发光,包括:
设置灰阶值L的初始值为1和调节步距灰阶S;
在相邻两次以不同灰阶模式驱动所述mini LED背光模组发光的过程中,后一次采用的所述灰阶模式中的灰阶值减去前一次采用的所述灰阶模式中的 灰阶值为所述调节步距灰阶S。
在本申请所提供mini LED背光模组的驱动方法中,所述在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值大于所述第m分区的亮度值时,则增加所述第m分区所对应的所述亮子场的时间或减少所述第m分区所对应的所述暗子场的时间;或者当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值小于所述第m分区的亮度值时,则减少所述第m分区所对应的所述亮子场的时间或增加所述第m分区所对应的所述暗子场的时间;根据调整后的所述第m分区所对应的所述亮子场的时间和所述第m分区所对应的所述暗子场的时间,驱动所述mini
LED背光模组在所述第L灰阶模式下发光;或
在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中所述第m分区所对应的所述亮子场的时间T 亮(m,L)和所述暗子场的时间T (m,L),其中,m为分区号,2≤m≤M。
在本申请所提供mini LED背光模组的驱动方法中,在同一所述灰阶模式下,设置分区号m的初始值为2;
在相邻两次调整不同所述分区对应的所述亮子场或所述暗子场的大小的过程中,后一次调整的所述分区的分区号比前一次调整的所述分区的分区号大1。
有益效果
本申请的有益效果为:本申请通过将mini LED背光模组沿数据线延伸的方向划分为多个分区,并在mini LED背光模组每一帧的周期中划分出调节子 场,根据不同灰阶模式的情况,调节不同分区对应的调节子场中亮子场或暗子场的大小,使得各分区显示的亮度在一设定的亮度阈值范围内,从而实现所述mini LED背光模组显示亮度的均匀化。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请一实施例中mini LED背光模组区域划分的结构示意图;
图2为本申请一实施例中mini LED背光模组的驱动方法的流程示意框图;及
图3为本申请一实施例中mini LED背光模组的驱动方法的逻辑结构示意框图。
本发明的实施方式
以下各实施例的说明是参考附加的图示,用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本发明,而非用以限制本发明。在图中,结构相似的单元是用以相同标号表示。
在本申请的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术 特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接或可以相互通讯;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中,除非另有明确的规定和限定,第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触,也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且,第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方,或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开,下文中对特定例子的部件和设置进行描述。当然,它们仅仅为示例,并且目的不在于限制本申请。此外,本申请可以在不同例子中重复参考数字和/或参考字母,这种重复是为了简化和清楚的目的,其本身不指示所讨论各种实施方式和/或设置之间的关系。此外,本申请提供了的各种特定的工艺和材料的例子,但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
现结合具体实施例对本申请的技术方案进行描述。
本申请提供一种mini LED背光模组的驱动方法,如图1至图3所示,包括以下步骤:
步骤S100:将所述mini LED背光模组沿第一方向100依次划分为M个分区,其中,所述mini LED背光模组包括控制单元和与所述控制单元连接的数据线10,所述第一方向100为所述数据线10由靠近所述控制单元的一端向 远离所述控制单元的一端延伸的方向,所述M个分区包括沿所述第一方向100依次排列的第一分区、第二分区…第M-1分区、第M分区;
可以理解的是,所述第一方向100即为远离所述控制单元的方向,具体的,所述mini LED背光模组中的mini LED越远离所述控制单元,则对应所需的数据线10长度越长,导致RC Loading越大,导致所述mini LED背光模组在数据线10的远近端的亮度会有差异,本实施例中,将所述mini LED背光模组沿第一方向100依次划分为M个分区,所述M个分区包括沿所述第一方向100依次排列的第一分区、第二分区…第M-1分区、第M分区,显然,离所述控制单元距离最近的为所述第一分区,也即所述第一分区中的mini LED与所述控制单元之间连接的数据线10最短,反之,所述第M分区离所述控制单元距离最远,所述第M分区中的mini LED与所述控制单元之间连接的数据线10最长,因此,将所述mini LED背光模组沿第一方向100依次划分为M个分区,便于对各所述分区进行分别控制。
步骤S200:将所述mini LED背光模组每一帧的周期划分为一调节子场和N个显示子场,驱动所述mini LED背光模组发光,其中,在所述调节子场的调节时间内,所述数据线10对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线10对所述mini LED背光模组位于所述第M分区内的部分输出高电位;根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的调节时间T
步骤S300:将每一所述分区对应的所述调节子场划分为亮子场和暗子场,其中,在任一所述分区所对应的所述亮子场的时间内,所述数据线10对所述mini LED背光模组位于该所述分区内的部分输出高电位,在任一所述分区所对应的所述暗子场的时间内,所述数据线10对所述mini LED背光模组位于该所述分区内的部分输出低电位;
驱动所述mini LED背光模组在不同灰阶模式下发光,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间; 及
步骤S400:根据各所述分区在不同所述灰阶模式下所对应的所述亮子场的时间和所述暗子场的时间,驱动所述mini LED背光模组发光。
可以理解的是,目前,基于AM(Active Matrix,主动矩阵式)的mini LED背光驱动方法成为一种有效减少LED驱动芯片数量以实现降低成本的方案,但随着SMT(Surface Mounted Technology,表面贴装技术)的发展及mini LED背光降低成本的需求,单背光灯板的尺寸也越来越大,使得数据线10(data line)在远近端的电阻电容负载(RC Loading)不一致,具体的,数据线10近端RC Loading较小,数据线10远端RC Loading较大,且加上电阻压降(IR drop)等效应,导致mini LED背光灯板在数据线10的远近端的亮度会有差异,具体到mini LED背光灯板中,靠近数据线10近端的部分较亮,靠近数据线10远端的部分较暗,从而导致mini LED背光灯板亮暗不均的显示问题,严重影响背光的品质。本实施例中,通过将mini LED背光模组沿数据线10延伸的方向划分为多个分区,并在mini LED背光模组每一帧的周期中划分出调节子场,根据不同灰阶模式的情况,调节不同分区对应的调节子场中亮子场或暗子场的大小,使得各分区显示的亮度在一设定的亮度阈值范围内,从而实现所述mini LED背光模组显示亮度的均匀化。
值得注意的是,在步骤S200中,将所述mini LED背光模组每一帧的周期划分为一调节子场和N个显示子场,所述调节子场用于调节所述mini LED背光模组显示的每一帧画面的亮暗,并且,在步骤S300中,将所述调节子场划分为亮子场和暗子场,具体在所述mini LED背光模组工作时,所述数据线10在所述亮子场的时间段内输出高电位,在所述暗子场的时间段内输出低电位,从而可以在不同灰阶模式的条件下,通过调节不同所述分区对应的所述调节子场中亮子场或暗子场的大小,实现所述mini LED背光模组显示亮度的均匀化,此外,在本申请中如无其它特殊说明,具体以1G1D架构、频率为240Hz,N=6位(bit)的mini LED背光模组为例,本实施例中,将所述mini LED背光模组沿第一方向100依次划分为4个分区,也即M=4,将所述mini LED背光模组每一帧的周期划分为一调节子场和6个显示子场。而驱动所述mini LED背光模组在不同灰阶模式下发光中,具体所述灰阶模式的数量为2 6个。
在一实施例中,如图2至图3所示,在所述步骤S200中,根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的所述调节时间T ,包括:
当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间;或者当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间;驱动所述mini LED背光模组发光,其中,在增加或减少后的所述调节子场的调节时间内,所述数据线10对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线10对所述mini LED背光模组位于所述第M分区内的部分输出高电位;或
当所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中对应的所述调节子场的调节时间T
可以理解的是,在本实施例中,M=4,所述第1分区的亮度值和第M分区的亮度值,也即是所述第1分区的亮度值和所述第4分区的亮度值,具体的,在调节所述调节子场的大小时,在驱动所述mini LED背光模组发光时,通过在所述调节子场的调节时间内,使所述数据线10对所述mini LED背光模组位于所述第1分区内的部分输出低电位,并且使所述数据线10对所述mini LED背光模组位于所述第M分区内的部分输出高电位,最大化的减小所述第1分区与所述第M分区的差异化,再对所述调节子场的大小进行调整,更加便于使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内,从而方便更快的获取所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的调节时间T
值得注意的是,在调整所述调节子场的调节时间后,然后以调整过后的所述调节子场的调节时间重新驱动所述mini LED背光模组发光,其中,在增加或减少后的所述调节子场的调节时间内,所述数据线10对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线10对所述mini LED 背光模组位于所述第M分区内的部分输出高电位;直至所述第1分区与第M分区的亮度差值在第一亮度阈值范围内。
在一实施例中,在所述步骤S200中,每一次驱动所述mini LED背光模组发光之前均包括:计算各所述显示子场的时间:
T 1=(1/f-T )/(2 N-1)
T n=2 n-1T 1
其中,T 1为第一显示子场的时间,T n为第n显示子场的时间,2≤n≤N,f为所述mini LED背光模组的显示频率。
可以理解的是,在本实施例中,f=240Hz,N=6,各所述显示子场之间的关系为:T 6=2T 5=4T 4=8T 3=16T 2=32T 1;在所述步骤S200中,每一次驱动所述mini LED背光模组发光,都需要结合各所述显示子场的时间。
在一实施例中,所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间中,每一次增加的时间为T 调增
所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间中,每一次减少的时间为T 调减
其中,T 调增=T 调减
可以理解的是,在具体调整所述调节子场的调节时间时,T 调增与T 调减可以相等,也可以不相等,本实施例中,T 调增与T 调减设置相等,便于统一对所述调节子场调整的精度,避免T 调增与T 调减之间的差异过大,在具体使用时,可根据具体情况,对所述T 调增和T 调减进行具体设置。
在一实施例中,在所述步骤S300中,将每一所述分区对应的所述调节子场划分为亮子场和暗子场中:
所述第1分区所对应的所述亮子场的时间为0,所述第M分区所对应的所述亮子场的时间与所述调节子场的时间相等。
可以理解的是,任一分区所对应的所述调节子场的时间等于所述亮子场的时间与所述暗子场的时间之和,将所述第1分区所对应的所述亮子场的时间设置为0,也即所述第1分区所对应的所述调节子场全部划分为所述暗子场,而 所述第M分区所对应的所述亮子场的时间与所述调节子场的时间相等,也即所述第M分区所对应的所述暗子场的时间为0,所述第M分区所对应的所述调节子场全部划分为所述亮子场。
在一实施例中,任意两所述分区中,其中一靠近所述控制单元的所述分区所对应的所述亮子场的时间小于另一远离所述控制单元的所述分区所对应的所述亮子场的时间。可以理解的是,越靠近所述控制单元,所述分区中的mini LED与所述控制单元之间连接的数据线10越短,对应所受到的RC Loading的影响越小,因此,无论是初次将所述调节子场划分为亮子场和暗子场,还是最后计算得到各所述分区所对应的亮子场时,连接所述数据线10的长度越短的所述分区,对应划分的所述亮子场的时间越小。
在一实施例中,如图3所示,在所述步骤S300中,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
驱动所述mini LED背光模组在第L灰阶模式下发光,其中,所述第L灰阶模式所对应的灰阶值为L,0≤L≤2 N-1,所述mini LED背光模组的所述灰阶模式的数量为2 N个;
在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间。
可以理解的是,本实施例中,所述mini LED背光模组的所述灰阶模式的数量为2 6个,并且,所述第L灰阶模式所对应的灰阶值为L,0≤L≤2 N-1,具体灰阶值L包括0、1…2 6-2、2 6-1;显然,需要在每一所述灰阶模式下,获取各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,其中,当所述灰阶值为L=0时,此时,所述mini LED背光模组呈全黑模式,因此不用计算各所述分区对应的所述亮子场的时间和所述暗子场的时间。
在一实施例中,如图3所示,在所述步骤S300中,驱动所述mini LED背光模组在不同灰阶模式下发光,包括:
设置灰阶值L的初始值为1和调节步距灰阶S;
在相邻两次以不同灰阶模式驱动所述mini LED背光模组发光的过程中,后一次采用的所述灰阶模式中的灰阶值减去前一次采用的所述灰阶模式中的灰阶值为所述调节步距灰阶S。
可以理解的是,将所述灰阶值L的初始值设为1,每获取一个所述灰阶模式下各所述分区所对应的所述亮子场的时间和所述暗子场的时间,则进入下一所述灰阶模式,其中,在相邻两次以不同灰阶模式驱动所述mini LED背光模组发光的过程中,后一次采用的所述灰阶模式中的灰阶值减去前一次采用的所述灰阶模式中的灰阶值为所述调节步距灰阶S;值得注意的是,还包括一灰阶判定步骤,当本次的所述灰阶模式的灰阶值L为最大值时,本实施例中,也即是所述灰阶值L=2 6-1时,则执行步骤S400。
在一实施例中,所述在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值大于所述第m分区的亮度值时,则增加所述第m分区所对应的所述亮子场的时间或减少所述第m分区所对应的所述暗子场的时间;或者当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值小于所述第m分区的亮度值时,则减少所述第m分区所对应的所述亮子场的时间或增加所述第m分区所对应的所述暗子场的时间;根据调整后的所述第m分区所对应的所述亮子场的时间和所述第m分区所对应的所述暗子场的时间,驱动所述mini LED背光模组在所述第L灰阶模式下发光;或
在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中所述第m分区所对应的所述亮子场的时间T 亮(m,L)和所述暗子场的时间T (m,L),其中,m为分区号,2≤m≤M。
可以理解的是,在每一次调整所述第m分区所对应的所述亮子场的时间或所述第m分区所对应的所述暗子场的时间后,在重新驱动所述mini LED背光模组的过程中,需要根据调整后的所述第m分区所对应的所述亮子场的时间和所述第m分区所对应的所述暗子场的时间,驱动所述mini LED背光模组在所述第L灰阶模式下发光;并且,在本实施例中,在同一所述灰阶模式下,设置分区号m的初始值为2;
在相邻两次调整不同所述分区对应的所述亮子场或所述暗子场的大小的过程中,后一次调整的所述分区的分区号比前一次调整的所述分区的分区号大1。
可以理解的是,将所述分区号m的初始值设置为2,每获取一次在第L灰阶模式下第m分区所对应的所述亮子场的时间和所述暗子场的时间之后,则进行获取下一所述分区所对应的所述亮子场的时间和所述暗子场的时间,具体的,在相邻两次调整不同所述分区对应的所述亮子场或所述暗子场的大小的过程中,后一次调整的所述分区的分区号比前一次调整的所述分区的分区号大1;值得注意的是,还包括一分区判定步骤,当本次的第m分区中的分区号m为最大值时,本实施例中,也即是当所述分区号m=M=4时,则在当前所述灰阶模式下,完成了获取各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间。
综上所述,本申请通过将mini LED背光模组沿数据线10延伸的方向划分为多个分区,并在mini LED背光模组每一帧的周期中划分出调节子场,根据不同灰阶模式的情况,调节不同分区对应的调节子场中亮子场或暗子场的大小,使得各分区显示的亮度在一设定的亮度阈值范围内,从而实现所述mini LED背光模组显示亮度的均匀化。
综上所述,虽然本发明已以优选实施例揭露如上,但上述优选实施例并非用以限制本发明,本领域的普通技术人员,在不脱离本发明的精神和范围内,均可作各种更动与润饰,因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种mini LED背光模组的驱动方法,包括以下步骤:
    步骤S100:将所述mini LED背光模组沿第一方向依次划分为M个分区,其中,所述mini LED背光模组包括控制单元和与所述控制单元连接的数据线,所述第一方向为所述数据线由靠近所述控制单元的一端向远离所述控制单元的一端延伸的方向,所述M个分区包括沿所述第一方向依次排列的第一分区、第二分区…第M-1分区、第M分区;
    步骤S200:将所述mini LED背光模组每一帧的周期划分为一调节子场和N个显示子场,驱动所述mini LED背光模组发光,其中,在所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的调节时间T
    步骤S300:将每一所述分区对应的所述调节子场划分为亮子场和暗子场,其中,在任一所述分区所对应的所述亮子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出高电位,在任一所述分区所对应的所述暗子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出低电位;
    驱动所述mini LED背光模组在不同灰阶模式下发光,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间;及
    步骤S400:根据各所述分区在不同所述灰阶模式下所对应的所述亮子场的时间和所述暗子场的时间,驱动所述mini LED背光模组发光。
  2. 根据权利要求1所述mini LED背光模组的驱动方法,其中,在所述步骤S200中,根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节 子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的所述调节时间T ,包括:
    当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间;或者当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间;驱动所述mini LED背光模组发光,其中,在增加或减少后的所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;或
    当所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中对应的所述调节子场的调节时间T
  3. 根据权利要求2所述mini LED背光模组的驱动方法,其中,在所述步骤S200中,每一次驱动所述mini LED背光模组发光之前均包括:计算各所述显示子场的时间:
    T 1=(1/f-T )/(2 N-1)
    T n=2 n-1T 1
    其中,T 1为第一显示子场的时间,T n为第n显示子场的时间,2≤n≤N,f为所述mini LED背光模组的显示频率。
  4. 根据权利要求2所述mini LED背光模组的驱动方法,其中,所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间中,每一次增加的时间为T 调增
    所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间中,每一次减少的时间为T 调减
    其中,T 调增=T 调减
  5. 根据权利要求1所述mini LED背光模组的驱动方法,其中,在所述步 骤S300中,将每一所述分区对应的所述调节子场划分为亮子场和暗子场中:
    所述第1分区所对应的所述亮子场的时间为0,所述第M分区所对应的所述亮子场的时间与所述调节子场的时间相等。
  6. 根据权利要求5所述mini LED背光模组的驱动方法,其中,任意两所述分区中,其中一靠近所述控制单元的所述分区所对应的所述亮子场的时间小于另一远离所述控制单元的所述分区所对应的所述亮子场的时间。
  7. 根据权利要求5所述mini LED背光模组的驱动方法,其中,在所述步骤S300中,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
    驱动所述mini LED背光模组在第L灰阶模式下发光,其中,所述第L灰阶模式所对应的灰阶值为L,0≤L≤2 N-1,所述mini LED背光模组的所述灰阶模式的数量为2 N个;
    在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间。
  8. 根据权利要求7所述mini LED背光模组的驱动方法,其中,在所述步骤S300中,驱动所述mini LED背光模组在不同灰阶模式下发光,包括:
    设置灰阶值L的初始值为1和调节步距灰阶S;
    在相邻两次以不同灰阶模式驱动所述mini LED背光模组发光的过程中,后一次采用的所述灰阶模式中的灰阶值减去前一次采用的所述灰阶模式中的灰阶值为所述调节步距灰阶S。
  9. 根据权利要求7所述mini LED背光模组的驱动方法,其中,所述在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
    在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值大于所述第m分区的亮度值时,则增加所述第m分区所对应的所述亮子场的时间或减少所述第m分区所对应的所述暗子场的时间;或者当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值小于所述第m分区的亮度值时,则减少所述第m分区所对应的所述亮子场的时间或增加所述第m分区所对应的所述暗子场的时间;根据调整后的所述第m分区所对应的所述亮子场的时间和所述第m分区所对应的所述暗子场的时间,驱动所述mini LED背光模组在所述第L灰阶模式下发光;或
    在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中所述第m分区所对应的所述亮子场的时间T 亮(m,L)和所述暗子场的时间
    T 暗(m,L),其中,m为分区号,2≤m≤M。
  10. 根据权利要求9所述mini LED背光模组的驱动方法,其中,在同一所述灰阶模式下,设置分区号m的初始值为2;
    在相邻两次调整不同所述分区对应的所述亮子场或所述暗子场的大小的过程中,后一次调整的所述分区的分区号比前一次调整的所述分区的分区号大1。
  11. 一种mini LED背光模组的驱动方法,包括以下步骤:
    步骤S100:将所述mini LED背光模组沿第一方向依次划分为M个分区,其中,所述mini LED背光模组包括控制单元和与所述控制单元连接的数据线,所述第一方向为所述数据线由靠近所述控制单元的一端向远离所述控制单元的一端延伸的方向,所述M个分区包括沿所述第一方向依次排列的第一分区、第二分区…第M-1分区、第M分区;
    步骤S200:将所述mini LED背光模组每一帧的周期划分为一调节子场和N个显示子场,驱动所述mini LED背光模组发光,其中,在所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;根据所述第1分区的亮度值和第M分区的亮度值,调整所 述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的调节时间T
    其中,所述根据所述第1分区的亮度值和第M分区的亮度值,调整所述调节子场的大小,以获取使所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时对应的所述调节子场的所述调节时间T ,包括:
    当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间;或者当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间;驱动所述mini LED背光模组发光,其中,在增加或减少后的所述调节子场的调节时间内,所述数据线对所述mini LED背光模组位于所述第1分区内的部分输出低电位,所述数据线对所述mini LED背光模组位于所述第M分区内的部分输出高电位;或
    当所述第1分区与第M分区的亮度差值在第一亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中对应的所述调节子场的调节时间T
    步骤S300:将每一所述分区对应的所述调节子场划分为亮子场和暗子场,其中,在任一所述分区所对应的所述亮子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出高电位,在任一所述分区所对应的所述暗子场的时间内,所述数据线对所述mini LED背光模组位于该所述分区内的部分输出低电位;
    驱动所述mini LED背光模组在不同灰阶模式下发光,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间;
    其中,将每一所述分区对应的所述调节子场划分为亮子场和暗子场中:
    所述第1分区所对应的所述亮子场的时间为0,所述第M分区所对应的所述亮子场的时间与所述调节子场的时间相等;及
    步骤S400:根据各所述分区在不同所述灰阶模式下所对应的所述亮子场 的时间和所述暗子场的时间,驱动所述mini LED背光模组发光。
  12. 根据权利要求11所述mini LED背光模组的驱动方法,其中,在所述步骤S200中,每一次驱动所述mini LED背光模组发光之前均包括:计算各所述显示子场的时间:
    T 1=(1/f-T )/(2 N-1)
    T n=2 n-1T 1
    其中,T 1为第一显示子场的时间,T n为第n显示子场的时间,2≤n≤N,f为所述mini LED背光模组的显示频率。
  13. 根据权利要求11所述mini LED背光模组的驱动方法,其中,所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值大于所述第M分区的亮度值时,增加所述调节子场的调节时间中,每一次增加的时间为T 调增
    所述当所述第1分区与所述第M分区的亮度差值在所述第一亮度阈值范围外且所述第1分区的亮度值小于所述第M分区的亮度值时,减少所述调节子场的调节时间中,每一次减少的时间为T 调减
    其中,T 调增=T 调减
  14. 根据权利要求11所述mini LED背光模组的驱动方法,其中,任意两所述分区中,其中一靠近所述控制单元的所述分区所对应的所述亮子场的时间小于另一远离所述控制单元的所述分区所对应的所述亮子场的时间。
  15. 根据权利要求11所述mini LED背光模组的驱动方法,其中,在所述步骤S300中,在每一所述灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在该灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
    驱动所述mini LED背光模组在第L灰阶模式下发光,其中,所述第L灰阶模式所对应的灰阶值为L,0≤L≤2 N-1,所述mini LED背光模组的所述灰阶模式的数量为2 N个;
    在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所 述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间。
  16. 根据权利要求15所述mini LED背光模组的驱动方法,其中,在所述步骤S300中,驱动所述mini LED背光模组在不同灰阶模式下发光,包括:
    设置灰阶值L的初始值为1和调节步距灰阶S;
    在相邻两次以不同灰阶模式驱动所述mini LED背光模组发光的过程中,后一次采用的所述灰阶模式中的灰阶值减去前一次采用的所述灰阶模式中的灰阶值为所述调节步距灰阶S。
  17. 根据权利要求15所述mini LED背光模组的驱动方法,其中,所述在第L灰阶模式下,根据各所述分区的亮度值,分别调整各所述分区对应的所述亮子场或所述暗子场的大小,以获取在第L灰阶模式下各所述分区与所述第1分区的亮度差值在第二亮度阈值范围内时所对应的所述亮子场的时间和所述暗子场的时间,包括:
    在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值大于所述第m分区的亮度值时,则增加所述第m分区所对应的所述亮子场的时间或减少所述第m分区所对应的所述暗子场的时间;或者当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围外且所述第1分区的亮度值小于所述第m分区的亮度值时,则减少所述第m分区所对应的所述亮子场的时间或增加所述第m分区所对应的所述暗子场的时间;根据调整后的所述第m分区所对应的所述亮子场的时间和所述第m分区所对应的所述暗子场的时间,驱动所述mini LED背光模组在所述第L灰阶模式下发光;或
    在所述第L灰阶模式下,当所述第1分区与所述第m分区的亮度差值在所述第二亮度阈值范围内时,则获取该次驱动所述mini LED背光模组的过程中所述第m分区所对应的所述亮子场的时间T 亮(m,L)和所述暗子场的时间T 暗(m,L),其中,m为分区号,2≤m≤M。
  18. 根据权利要求17所述mini LED背光模组的驱动方法,其中,在同一所述灰阶模式下,设置分区号m的初始值为2;
    在相邻两次调整不同所述分区对应的所述亮子场或所述暗子场的大小的 过程中,后一次调整的所述分区的分区号比前一次调整的所述分区的分区号大1。
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CN112735345B (zh) * 2021-01-08 2022-03-08 Tcl华星光电技术有限公司 背光单元的控制方法、显示面板及显示装置
CN112767887A (zh) * 2021-01-22 2021-05-07 Tcl华星光电技术有限公司 背光控制方法、背光控制系统及存储介质
CN114038393B (zh) * 2021-07-16 2022-10-21 重庆康佳光电技术研究院有限公司 一种像素电路和显示面板
CN114007304B (zh) * 2021-11-25 2024-02-27 上海新相微电子股份有限公司 迷你led的高效驱动方法及装置
CN113851080B (zh) * 2021-11-29 2022-02-18 南京浣轩半导体有限公司 一种Mini-LED驱动方法和显示系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6151000A (en) * 1996-05-13 2000-11-21 Hitachi, Ltd. Display apparatus and display method thereof
EP1365382A1 (en) * 2002-05-22 2003-11-26 Thomson Licensing S.A. Method of driving a plasma display panel
CN102667903A (zh) * 2010-01-15 2012-09-12 爱特梅尔公司 通过帧插入来控制发光二极管背光照明
CN104749847A (zh) * 2015-04-20 2015-07-01 京东方科技集团股份有限公司 一种阵列基板、显示装置及图像显示方法
CN108053800A (zh) * 2018-01-25 2018-05-18 北京集创北方科技股份有限公司 显示装置及其驱动方法
CN109559672A (zh) * 2019-01-07 2019-04-02 成都中电熊猫显示科技有限公司 面板亮度的调整方法、装置及存储介质
CN109920363A (zh) * 2019-04-19 2019-06-21 京东方科技集团股份有限公司 一种亮度补偿方法、亮度补偿装置、显示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100502929B1 (ko) * 2003-08-05 2005-07-21 삼성에스디아이 주식회사 플라즈마 디스플레이 패널의 화상 표시 방법 및 그 장치
JP6694989B2 (ja) * 2018-06-27 2020-05-20 シャープ株式会社 発光装置、表示装置、およびled表示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6151000A (en) * 1996-05-13 2000-11-21 Hitachi, Ltd. Display apparatus and display method thereof
EP1365382A1 (en) * 2002-05-22 2003-11-26 Thomson Licensing S.A. Method of driving a plasma display panel
CN102667903A (zh) * 2010-01-15 2012-09-12 爱特梅尔公司 通过帧插入来控制发光二极管背光照明
CN104749847A (zh) * 2015-04-20 2015-07-01 京东方科技集团股份有限公司 一种阵列基板、显示装置及图像显示方法
CN108053800A (zh) * 2018-01-25 2018-05-18 北京集创北方科技股份有限公司 显示装置及其驱动方法
CN109559672A (zh) * 2019-01-07 2019-04-02 成都中电熊猫显示科技有限公司 面板亮度的调整方法、装置及存储介质
CN109920363A (zh) * 2019-04-19 2019-06-21 京东方科技集团股份有限公司 一种亮度补偿方法、亮度补偿装置、显示装置

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