WO2019041846A1 - 背光模组、其控制方法及显示装置、其驱动方法 - Google Patents

背光模组、其控制方法及显示装置、其驱动方法 Download PDF

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Publication number
WO2019041846A1
WO2019041846A1 PCT/CN2018/084492 CN2018084492W WO2019041846A1 WO 2019041846 A1 WO2019041846 A1 WO 2019041846A1 CN 2018084492 W CN2018084492 W CN 2018084492W WO 2019041846 A1 WO2019041846 A1 WO 2019041846A1
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WO
WIPO (PCT)
Prior art keywords
light
control circuit
light emitting
current control
backlight
Prior art date
Application number
PCT/CN2018/084492
Other languages
English (en)
French (fr)
Inventor
陆政华
何宗泽
孟智明
李硕
杨建光
冯志鹏
张亮
陈宇轩
龙凤
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP18830356.4A priority Critical patent/EP3493194A4/en
Priority to US16/318,212 priority patent/US11341926B2/en
Publication of WO2019041846A1 publication Critical patent/WO2019041846A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/024—Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0283—Arrangement of drivers for different directions of scanning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight module, a control method thereof, a display device, and a driving method thereof.
  • LCD Liquid Crystal Display
  • LCD TV mobile phone
  • PDA personal digital assistant
  • digital camera computer screen Or a laptop screen, etc.
  • the working mode of the liquid crystal display panel is passive illumination. Therefore, it is necessary to provide a backlight module on the light incident side of the liquid crystal display panel.
  • the driving mode of the backlight module is a driving mode in which the entire backlight is simultaneously turned on and simultaneously turned off.
  • the backlight In the process of image display, the backlight is in a normally open state, and the consumption of power is large, which is not conducive to energy conservation.
  • the backlight is divided into a plurality of light emitting regions, each of the light emitting regions includes a plurality of light emitting devices; and the light emitting devices in each of the light emitting regions are independent of each other;
  • the backlight control circuit includes a plurality of current control circuits in one-to-one correspondence with each of the light-emitting regions, and a backlight adjustment circuit connected to each of the current control circuits;
  • the backlight adjustment circuit is configured to be configured according to a display area scanning direction of the display panel determines an operation sequence of the current control circuit;
  • the current control circuit is configured to correspond to an area corresponding to the light emitting device in the display area according to a working order determined by the backlight adjustment circuit When scanned, the light emitting device is controlled to emit light.
  • each of the light emitting regions is divided into a plurality of light emitting sub-regions arranged in a column direction and extending along a row direction, each of the Each of the illuminating sub-regions includes at least one illuminating device, each of the illuminating sub-regions corresponding to at least one row of pixels in the display panel;
  • the backlight adjustment circuit is further configured to determine a scanning order of each of the illuminating sub-regions in the illuminating region according to a scanning direction of a display area of the display panel;
  • the current control circuit is specifically configured to control the light emitting device in the light emitting sub-region to emit light when the row pixels corresponding to the light emitting sub-region are scanned according to a scanning order of the light emitting sub-regions.
  • each of the illuminating sub-regions includes a plurality of illuminating groups arranged in a row direction, and each of the illuminating groups includes one or a plurality of series The light emitting device;
  • the current control circuit is specifically configured to control the light emitting device in the light emitting group to emit light when a pixel corresponding to the light emitting group is scanned.
  • the current control circuit is specifically configured to control the illumination group according to a grayscale value of a pixel corresponding to the illumination group. Working current.
  • the backlight adjustment circuit is further configured to determine a brightness value corresponding to the light-emitting group according to image data to be displayed in each frame;
  • the current control circuit is specifically configured to generate an operating current for controlling the illumination of the illumination group according to the brightness value corresponding to the illumination group determined by the backlight adjustment circuit.
  • the backlight adjustment circuit is connected to each of the current control circuits through a serial peripheral interface;
  • serial peripheral interface includes an input end and a plurality of output ends
  • the input end is connected to the backlight adjustment circuit, and the plurality of output ends are respectively connected to the current control circuit via a bus.
  • the bus includes: a clock signal line, a data signal line, and a boundary distinguishing signal line;
  • the clock signal line is configured to transmit a clock signal
  • the data signal line is configured to transmit a brightness value corresponding to the light emitting area
  • the boundary distinguishing signal line is configured to transmit a control signal that controls an operating state of the current control circuit.
  • the backlight is divided into 2*2 of the light emitting regions, and each of the light emitting regions is divided into five light emitting regions. a sub-region, each of the illuminating sub-regions comprising six of the illuminating groups.
  • an embodiment of the present disclosure further provides a display device, including a display panel and a backlight module, and the backlight module is the backlight module provided by the embodiment of the present disclosure.
  • an embodiment of the present disclosure further provides a control method of the foregoing backlight module, including:
  • the backlight adjustment circuit determines the working sequence of the current control circuit according to the scanning direction of the display area of the display panel
  • the current control circuit controls the light emitting device to emit light when a region corresponding to the light emitting device is scanned in the display area.
  • the method when the light emitting region is divided into a plurality of light emitting sub-regions, the method further includes: the backlight adjusting circuit according to the display panel a scanning area of the display area determines a scanning order of each of the illuminating sub-areas in the illuminating area;
  • the current control circuit controls the light emitting device to emit light, and specifically includes: when the row pixels corresponding to the light emitting sub-area are scanned, the current control circuit controls The light emitting device in the illuminating subregion emits light.
  • the illuminating sub-region includes a plurality of illuminating groups
  • the row pixels corresponding to the illuminating sub-region are scanned
  • the current control circuit controls the light emitting device to emit light in the illuminating sub-region, and specifically includes:
  • the current control circuit controls the light emitting device within the light emitting group to emit light when a pixel corresponding to the light emitting group is scanned.
  • the current control circuit controls the light emitting device to emit light in the light-emitting group, and specifically includes:
  • the current control circuit controls an operating current of the lighting group according to a grayscale value of a pixel corresponding to the lighting group.
  • the current control circuit controls the operation of the illumination group according to a grayscale value of a pixel corresponding to the illumination group.
  • Current including:
  • the backlight adjustment circuit determines, according to image data to be displayed for each frame, a brightness value corresponding to the light-emitting group
  • the current control circuit generates an operating current for controlling the illumination of the illumination group according to the brightness value corresponding to the illumination group determined by the backlight adjustment circuit.
  • the scanning direction of the display area of the display panel is progressive scan from top to bottom;
  • the backlight adjustment circuit determines that the working sequence of the current control circuit works in order from top to bottom, and determines that the scanning order of each of the illuminating sub-regions in the illuminating region is sequentially scanned from top to bottom;
  • the display area of the display panel scans from the upper and lower ends to the middle of the line scan; the backlight adjustment circuit determines that the current control circuit works in order from the upper and lower ends to the middle. And determining that the scanning order of each of the illuminating sub-regions in the illuminating region in the upper half is sequentially scanning from top to bottom, and the scanning order of each of the illuminating sub-regions in the illuminating region in the lower half is from Scan down to the top.
  • an embodiment of the present disclosure further provides a driving method of a display device, including:
  • the backlight module is displayed and driven by the control method of the backlight module of the present disclosure.
  • FIG. 1 is a schematic structural diagram of a backlight module of a display panel according to some embodiments of the present disclosure
  • FIG. 2 is a schematic structural diagram of a backlight module of a display panel according to some embodiments of the present disclosure
  • FIG. 3 is a schematic structural diagram of a backlight module of a display panel according to some embodiments of the present disclosure
  • FIG. 4 is a schematic structural diagram of illuminating sub-area division in a backlight module of a display panel according to some embodiments of the present disclosure
  • FIG. 5 is a schematic structural diagram of a light-emitting group division in a backlight module of a display panel according to some embodiments of the present disclosure
  • FIG. 6 is a schematic structural diagram of a display device according to some embodiments of the present disclosure.
  • FIG. 7 is a timing diagram of data transmission by a backlight adjustment circuit to a current control circuit according to some embodiments of the present disclosure
  • FIG. 8 is a schematic structural diagram of two light emitting regions according to some embodiments of the present disclosure.
  • FIG. 9 is a timing diagram of two current control circuits for controlling two light emitting regions according to some embodiments of the present disclosure.
  • a backlight module includes:
  • the backlight 1 is divided into a plurality of light emitting regions, each of the light emitting regions includes a plurality of light emitting devices; and the light emitting devices in each of the light emitting regions are independent of each other;
  • the backlight control circuit 7 includes a plurality of current control circuits 2 corresponding to the respective light-emitting areas, and a backlight adjustment circuit 3 connected to each of the current control circuits 2;
  • the backlight adjustment circuit 3 is configured to determine the operation sequence of the current control circuit 2 according to the display area scanning direction of the display panel;
  • the current control circuit 2 is configured to control the light emitting device to emit light when the area corresponding to the light emitting device is scanned in the display area according to the operation sequence determined by the backlight adjustment circuit 2.
  • the backlight module provided by the embodiment of the present disclosure divides the light-emitting areas of the backlight 1 so that the light-emitting devices in the light-emitting areas are independent of each other, that is, there is no electrical connection between the light-emitting devices in the light-emitting areas. relationship.
  • Each of the light-emitting regions is provided with a current control circuit 2 for driving the light-emitting region thereof.
  • Each of the light-emitting regions of the backlight module 1 is disposed in one-to-one correspondence with the current control circuit 2, that is, one current control circuit 2 independently controls one light-emitting region.
  • the method effectively alleviates the problem that only one current control circuit 2 is provided in the related art, and the backlight module is controlled by a current control circuit 2, causing the current control circuit 2 to deal with the problem that the data amount is too large.
  • the current control circuit 2 can control the light-emitting device in the light-emitting area to emit light, and the light-emitting area corresponding to the area where the scanning is not performed in the display panel does not emit light, thereby greatly reducing the light-emitting area.
  • the illumination time of each of the light-emitting devices in the backlight 1 saves a large amount of electric energy.
  • crosstalk between the left and right eyes can be reduced in 3D display.
  • the backlight 1 includes a plurality of light emitting regions, that is, the backlight may include a plurality of light emitting regions of m rows ⁇ n columns, where m is an integer greater than or equal to 2, and n is a positive integer. Also, m is generally an even number, and n is generally an integer greater than or equal to 2.
  • FIG. 3 is an example in which four light-emitting regions are respectively a first light-emitting region 1a, a second light-emitting region 1b, a third light-emitting region 1c, and a fourth light-emitting region 1d;
  • the area-to-one corresponding current control circuit 2 includes: a first current control circuit 2a that controls the first light-emitting area 1a, a second current control circuit 2b that controls the second light-emitting area 1b, and a third current control that controls the third light-emitting area 1c.
  • the circuit 2c, and a fourth current control circuit 2d that controls the fourth light-emitting region 1d.
  • the number and arrangement of the light-emitting areas included in the backlight 1 may be determined according to actual needs, and the above is only one embodiment, which is not limited herein.
  • the current control circuit 2 may be configured to control corresponding only when an area corresponding to the light-emitting area controlled by the display panel and the current control circuit 2 is scanned.
  • the light emitting device in the light emitting region emits light.
  • a period of time after the area of the display panel corresponding to the light-emitting area is scanned the light emitted by the light-emitting device in the light-emitting area may have an appropriate delay.
  • the delay time can be set according to parameters such as the size of the display panel and the time of the human eye to distinguish the time.
  • each of the light-emitting regions may be divided into a plurality of light-emitting sub-regions 11 arranged in the column direction and extending along the row direction, and each of the light-emitting regions
  • Each of the sub-regions 11 includes at least one light emitting device, and each of the light-emitting sub-regions 11 corresponds to at least one row of pixels in the display panel;
  • the backlight adjustment circuit 3 is further configured to determine a scanning order of each of the illuminating sub-regions 11 in the illuminating region according to a scanning direction of the display area of the display panel;
  • the current control circuit 2 is specifically configured to control the light-emitting devices in the light-emitting sub-region 11 to emit light when the row pixels corresponding to the light-emitting sub-region 11 are scanned according to the scanning order of the light-emitting sub-regions 11.
  • each of the light-emitting regions is further divided, that is, each of the light-emitting regions is further refined, and when each of the light-emitting regions is divided into a plurality of light-emitting sub-regions 11 arranged in the column direction, the light-emitting sub-regions 11 may be When the corresponding row of pixels is scanned, the light-emitting devices in each of the light-emitting sub-regions 11 emit light, and the light-emitting devices in the light-emitting sub-region 11 corresponding to the row pixels that are not scanned do not emit light, thereby further reducing the display panel. When displayed, the illumination time of each of the light-emitting devices in the backlight 1 saves the consumption of the power by the backlight 1.
  • a period of time after the area of the display panel corresponding to the light-emitting sub-area 11 is scanned may be The light emitted from the light-emitting device in the illuminating sub-region 11 is also subjected to an appropriate delay, wherein the delay time can be set according to parameters such as the size of the display panel and the resolution time of the human eye.
  • each of the illuminating sub-regions 11 may include a plurality of illuminating groups 12 arranged in a row direction, and each of the illuminating groups 12 includes one or a series of a plurality of light emitting devices; each light group 12 corresponds to one or more pixels in the display panel;
  • the current control circuit 2 is specifically configured to control the light-emitting devices within the light-emitting group 12 to emit light when the pixels corresponding to the light-emitting group 12 are scanned.
  • each of the illuminating sub-regions 11 is divided into a plurality of illuminating groups 12 by subdividing each illuminating sub-region 11 by a current control circuit 2
  • Each of the illumination groups 12 is time-divisionally driven, that is, when the pixels corresponding to the illumination groups 12 are scanned, the current control circuit 2 controls the illumination devices in the illumination group 12 to emit light, and when the pixels corresponding to the illumination groups 12 are not scanned, The light-emitting devices in each of the light-emitting groups 12 do not emit light.
  • This driving method greatly reduces the lighting time of each of the light-emitting devices in the backlight 1, thereby achieving the purpose of saving energy.
  • a period of time after the area of the display panel corresponding to the light-emitting group 12 is scanned may be The light emitted by the light-emitting device in the light-emitting group 12 also has an appropriate delay, wherein the delay time can be set according to parameters such as the size of the display panel and the resolution time of the human eye.
  • the current control circuit 2 is specifically configured to control the operating current of the light-emitting group 12 according to the grayscale value of the pixel corresponding to the light-emitting group 12. In this way, the brightness of the corresponding light-emitting group 12 can be adjusted according to the gray scale required for display, thereby improving the display contrast.
  • the backlight adjustment circuit 3 is further configured to determine a brightness value corresponding to the light group 12 according to image data to be displayed in each frame;
  • the current control circuit 2 is specifically configured to generate an operating current that controls the illumination of the illumination group 12 according to the brightness value corresponding to the illumination group 12 determined by the backlight adjustment circuit 3.
  • the backlight adjustment circuit 3 calculates the luminance value corresponding to each illumination, 12 according to the gray value of the image to be displayed corresponding to each illumination group 12, and the current control circuit 2
  • the brightness value corresponding to the light-emitting group 12 determined by the backlight adjusting circuit 3 generates a current for controlling the light-emitting group to emit light.
  • the current control circuit 2 controls each light-emitting group 12 corresponding to the scanned pixel to emit a corresponding brightness value.
  • the light can increase the contrast between the areas of the image, making the picture display more clear and realistic.
  • the backlight adjustment circuit 3 can be connected to the current control circuit 2 through the serial peripheral interface 6;
  • the serial peripheral interface 6 generally includes an input end and a plurality of output ends
  • the input terminal is connected to the backlight adjustment circuit 3, and the plurality of output terminals are respectively connected to the current control circuit 2 via the bus 8.
  • the bus 8 specifically includes: a clock signal line, a data signal line, and a boundary distinguishing signal line;
  • the clock signal line is configured to transmit a clock signal
  • the data signal line is configured to transmit a brightness value corresponding to the light emitting area
  • the boundary distinguishing signal line is configured to transmit a control signal that controls the operating state of the current control circuit 2.
  • an embodiment of the present disclosure further provides a control method of the foregoing backlight module, the method comprising:
  • the backlight adjustment circuit determines the working order of the current control circuit according to the scanning direction of the display area of the display panel
  • the current control circuit controls the light emitting device to emit light when the area corresponding to the light emitting device is scanned in the display area.
  • the method when the light emitting region is divided into the plurality of light emitting sub-regions, the method further includes: the backlight adjusting circuit determining the light emitting region according to the scanning direction of the display region of the display panel Scanning order of each illuminating sub-area;
  • the current control circuit controls the light emitting device to emit light, and specifically includes: when the row pixels corresponding to the light emitting sub-area are scanned, the current control circuit controls the light emitting device in the light emitting sub-area to emit light.
  • the current control circuit controls the illuminating sub-region
  • the illuminating device within the illuminating device specifically includes:
  • the current control circuit controls the illumination of the illumination device within the illumination group.
  • the current control circuit controls the illumination of the light-emitting device in the light-emitting group, and specifically includes:
  • the current control circuit controls the operating current of the lighting group according to the grayscale value of the pixel corresponding to the lighting group.
  • the current control circuit controls the operating current of the light-emitting group according to the gray-scale value of the pixel corresponding to the light-emitting group, and specifically includes:
  • the backlight adjustment circuit determines the brightness value corresponding to the light-emitting group according to the image data to be displayed in each frame;
  • the current control circuit generates an operating current for controlling the illumination of the illumination group according to the brightness value corresponding to the illumination group determined by the backlight adjustment circuit.
  • the scanning direction of the display area of the display panel is progressive scan from top to bottom; and the backlight adjustment circuit determines the current control circuit.
  • the working sequence is to work sequentially from top to bottom, and the scanning order of each illuminating sub-area in the illuminating area is determined to be sequentially scanned from top to bottom;
  • the display area of the display panel scans from the upper and lower ends to the middle of the line scan; the backlight adjustment circuit determines that the current control circuit works in order from the upper and lower ends to the middle, and is determined to be in the upper half.
  • the scanning order of each of the illuminating sub-regions in the illuminating region is sequentially scanned from top to bottom, and the scanning order of the illuminating sub-regions in the illuminating region in the lower half is sequentially scanned from bottom to top.
  • the progressive scan from the upper and lower ends to the middle is as follows: first scan the first row, then scan the last row, then scan the second row, then sweep the second row, and scan in this order to avoid neighbors.
  • Crosstalk occurs in two lines.
  • the scanning mode of the backlight module is set according to the scanning mode of the display area of the display panel.
  • the backlight 1 includes four light-emitting regions, each of which includes five light-emitting sub-regions arranged in a row direction, and each of the light-emitting sub-regions includes six light-emitting groups as an example, and the backlight module and the control method thereof are performed. Specific explanation:
  • the display panel 5 can be divided into four display areas, which are a first display area 5a, a second display area 5b, a third display area 5c, and a fourth display area 5d, respectively, and each display area is processed according to image data.
  • the image data sent by the control circuit 4 performs progressive display of the sub-areas, that is, the first display area 5a, the second display area 5b, the third display area 5c, and the fourth display area 5d are sequentially displayed, and each display area is progressive.
  • the backlight adjusting circuit 3 determines the brightness value to be emitted by each of the light-emitting groups 12 in each backlight 1 based on the gray value of the image to be displayed for each frame transmitted by the image data processing control circuit 4.
  • the backlight adjustment circuit 3 transmits the calculated luminance values of the respective light-emitting areas of the backlight 1 to the current control circuit 2 corresponding to each of the light-emitting areas via the serial peripheral interface 6 and the bus 8.
  • the current control circuit 2 includes a first current control circuit 2a, a second current control circuit 2b, a third current control circuit 2c, and a fourth current control circuit 2d.
  • the control is performed by using the low level as the active signal.
  • the effective signal can also be a high level signal, which is not limited herein.
  • each current control circuit 2 includes 32 bytes. Since the corresponding light-emitting area of each current control circuit 2 includes 30 light-emitting groups 12, each current control circuit 2 includes at least 30 output pins. Each output pin is correspondingly connected to one illumination group 12, wherein the luminance value of each illumination group 12 corresponds to 1 byte, and includes 1 device identification identifier byte before 30 illumination group bytes, and 30 illuminations are performed. The group byte is followed by a check byte to verify the correctness of the data transfer.
  • one current control circuit 2 corresponds to one light-emitting area.
  • the first current control circuit 2a controls the first light-emitting area 1a
  • the second current control circuit 2b controls the second.
  • the third current control circuit 2c controls the third light-emitting region 1c
  • the fourth current control circuit 2g controls the fourth light-emitting region 1d.
  • each light-emitting area of the backlight 1 is also in the form of progressive scanning in order to match the display of each display area in the display panel.
  • a current control circuit 2a and a second current control circuit 2b respectively control the first light-emitting area 1a and the second light-emitting area 1b as an example.
  • each light-emitting area includes five rows of light-emitting sub-areas 11, each of which The illuminating sub-region 11 comprises six illuminating groups 12, i.e. each illuminating region comprises 30 illuminating groups 12, each illuminating group 12 comprising one or more illuminating devices connected in series.
  • L1, L2, L3, L4, and L5 are sequentially input signals, and the light-emitting sub-areas located at L1, L2, L3, L4, and L5 are illuminated line by line.
  • each of the light-emitting regions is sequentially illuminated by the light-emitting sub-region 11; when the light-emitting regions where L1, L2, L3, L4, and L5 are located are illuminated line by line, the next light-emitting region starts to emit light row by row, that is, Signals are sequentially input to R1, R2, R3, R4, and R5, so that the illuminating sub-regions located at R1, R2, R3, R4, and R5 emit light line by line.
  • each of the light-emitting areas in the backlight 1 is illuminated one by one.
  • the video source is a 2D signal
  • the video source signal is a 3D signal
  • the pixels in the fourth display area 5d are scanned from bottom to top, and therefore, the first light-emitting area 1a and the second light-emitting area 1a are scanned line by line from top to bottom, the third light-emitting area 1c and the fourth light-emitting area 1d scans from bottom to top, this scanning method can reduce crosstalk between left and right eyes while reducing energy consumption, making the image display more realistic.
  • each of the illuminating sub-regions 11 corresponds to a plurality of rows of pixels of the display panel, and the illuminating sub-region 11 is turned off only after all the corresponding plurality of rows of pixels have been scanned, so as to avoid frequent illuminating sub-regions 11 when the pixels are progressively scanned.
  • Switching operation The time taken for the full-screen refresh of the backlight 1 is far less than the time taken to refresh one frame of pixels.
  • the backlight 1 includes four light-emitting areas, each of which includes the 32 bytes, and each byte includes 8 bits.
  • the time taken for the full-screen refresh of the backlight 1 is much smaller than the time taken to refresh one frame of pixels, that is, the refresh capability of the backlight 1 is greater than the refresh capability of each frame of the image. Therefore, the backlight 1 does not appear when the pixel is refreshed. If it is not turned on, it effectively ensures the normal display of the image.
  • each of the light-emitting regions includes five rows of light-emitting sub-regions, and one frame includes 1920*1080 pixels as an example.
  • Each row plus blank pixels has a total of 1125 pixels, and each row of the light-emitting sub-regions 11 is turned on.
  • an embodiment of the present disclosure further provides a display device, including a display panel and a backlight module, and the backlight module is any one of the above backlight modules.
  • the display device may be any liquid crystal display device having a power saving requirement such as a liquid crystal display panel or a large outdoor advertising panel.
  • the implementation of the display device can be referred to the embodiment of the backlight module, and the repeated description is omitted.
  • an embodiment of the present disclosure further provides a driving method of a display device.
  • the principle of solving the problem is similar to the control method of the foregoing backlight module.
  • the driving method refer to the above control method. The embodiments are not repeated here.
  • the driving method of the display device specifically includes:
  • the backlight module is displayed and driven by the control method of the backlight module of the present disclosure.
  • the backlight module, the control method thereof, the display device and the driving method thereof are provided by dividing a light source region of a backlight and configuring a current control circuit for driving each of the light emitting regions to emit light.
  • Each light-emitting area in the module is arranged in one-to-one correspondence with the current control circuit, that is, a current control circuit independently controls one light-emitting area, and the setting mode effectively alleviates only one current control circuit in the related art, and passes through a current control circuit. Controlling the backlight module causes the current control circuit to handle the problem of excessive data volume.
  • the current control circuit can control the light-emitting device in the light-emitting area to emit light, and the light-emitting area corresponding to the area where the scanning is not performed in the display panel does not emit light, thereby greatly reducing the backlight.
  • the illumination time of each of the light-emitting devices in the source thereby saving a large amount of electrical energy.
  • crosstalk between the left and right eyes can be reduced in 3D display.

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Abstract

一种背光模组、其控制方法及显示装置、其驱动方法，通过对背光源(1)进行发光区域的划分，并对每个发光区域配置驱动其发光的电流控制电路(2)，背光模组中的各发光区域与电流控制电路(2)一一对应设置，缓解了相关技术中只通过一个电流控制电路控制背光模组导致电流控制电路处理数据量过大的问题。在发光区域对应的显示区的区域被扫描时，电流控制电路(2)可以控制发光区域内的发光器件发光，而显示面板中没有进行扫描的区域对应的发光区域不进行发光，减少了背光源中每个发光器件的发光时间，节省电能。通过对发光区域的分时驱动配合显示面板的扫描模式，可以在3D显示时减少左右眼之间的串扰。

Description

背光模组、其控制方法及显示装置、其驱动方法
相关申请的交叉引用
本公开要求在2017年08月31日提交中国专利局、申请号为201710776031.X、发明名称为“一种背光模组、其控制方法及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组、其控制方法及显示装置、其驱动方法。
背景技术
液晶显示面板(LCD，Liquid Crystal Display)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用，如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。
液晶显示面板的工作模式为被动发光，因此，需要在液晶显示面板的入光侧设置背光模组。目前，背光模组的驱动方式为整个背光源同时打开和同时关闭的驱动模式。在进行图像显示的过程中，背光源处于常开的状态，对电量的消耗较大，不利于节约能源。尤其是在大尺寸液晶图像显示系统中，为了满足显示的要求，需要配备大尺寸的背光模组，导致消耗电量更大。
发明内容
本公开实施例提供的一种背光模组，包括：
背光源，所述背光源分为多个发光区域，每个所述发光区域包括多个发光器件；各所述发光区域中的发光器件相互独立；
背光控制电路，所述背光控制电路包括与各所述发光区域一一对应的多个电流控制电路，以及与各所述电流控制电路均连接的背光调节电路；所述 背光调节电路被配置为根据显示面板的显示区扫描方向确定所述电流控制电路的工作顺序；所述电流控制电路被配置为根据所述背光调节电路确定的工作顺序，在所述显示区中与所述发光器件对应的区域被扫描时，控制所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，在各所述发光区域分为在列方向排列且沿着行方向延伸的多个发光子区域，各所述发光子区域均包括至少一个发光器件，每一所述发光子区域对应于所述显示面板中至少一行像素；
所述背光调节电路还被配置为根据显示面板的显示区扫描方向确定所述发光区域中各所述发光子区域的扫描顺序；
所述电流控制电路被具体配置为根据所述发光子区域的扫描顺序，在所述发光子区域对应的行像素被扫描时，控制所述发光子区域内的所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，各所述发光子区域包括在行方向排列的多个发光组，各所述发光组包括一个或串联的多个所述发光器件；
所述电流控制电路被具体配置为当所述发光组对应的像素被扫描时，控制所述发光组内的所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述电流控制电路被具体配置为根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述背光调节电路还被配置为根据每一帧待显示图像数据，确定所述发光组对应的亮度值；
所述电流控制电路具体被配置为根据所述背光调节电路确定的所述发光组对应的亮度值，生成控制所述发光组发光的工作电流。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所 述背光调节电路通过串行外设接口与各所述电流控制电路连接；
其中，所述串行外设接口包括一个输入端和多个输出端；
所述输入端与所述背光调节电路连接，多个所述输出端分别通过总线与所述电流控制电路连接。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述总线包括：时钟信号线、数据信号线和边界区分信号线；
所述时钟信号线被配置为传输时钟信号；
所述数据信号线被配置为传输所述发光区域对应的亮度值；
所述边界区分信号线被配置为传输控制所述电流控制电路工作状态的控制信号。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述背光源分为2*2个所述发光区域，每个所述发光区域分为5个所述发光子区域，每个所述发光子区域包括6个所述发光组。
另一方面，本公开实施例还提供了一种显示装置，包括显示面板和背光模组，所述背光模组为本公开实施例提供的上述背光模组。
另一方面，本公开实施例还提供了一种上述背光模组的控制方法，包括：
背光调节电路根据显示面板的显示区扫描方向确定所述电流控制电路的工作顺序；
在所述显示区中发光器件对应的区域被扫描时，所述电流控制电路控制所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组的控制方法中，当所述发光区域分为多个发光子区域时，还包括：所述背光调节电路根据显示面板的显示区扫描方向确定所述发光区域中各所述发光子区域的扫描顺序；
在所述显示区中发光器件对应的区域被扫描时，所述电流控制电路控制所述发光器件发光，具体包括：当所述发光子区域对应的行像素被扫描时，所述电流控制电路控制所述发光子区域内的所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组的控制方法中，当所述发光子区域包括多个发光组时，当所述发光子区域对应的行像素被扫描时，所述电流控制电路控制所述发光子区域内的所述发光器件发光，具体包括：
当所述发光组对应的像素被扫描时，所述电流控制电路控制所述发光组内的所述发光器件发光。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组的控制方法中，所述电流控制电路控制所述发光组内的所述发光器件发光，具体包括：
所述电流控制电路根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组的控制方法中，所述电流控制电路根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流，具体包括：
所述背光调节电路根据每一帧待显示图像数据，确定所述发光组对应的亮度值；
所述电流控制电路根据所述背光调节电路确定的所述发光组对应的亮度值，生成控制所述发光组发光的工作电流。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组的控制方法中，在2D显示模式下，所述显示面板的显示区扫描方向为从上到下逐行扫描；所述背光调节电路确定所述电流控制电路的工作顺序为从上到下顺序工作，且确定所述发光区域中各所述发光子区域的扫描顺序为从上到下顺序扫描；
在3D显示模式下，所述显示面板的显示区扫描方向为从上下两端到中间逐行扫描；所述背光调节电路确定所述电流控制电路的工作顺序为从上下两端到中间顺序工作，且确定位于上半部的所述发光区域中各所述发光子区域的扫描顺序为从上到下顺序扫描，位于下半部的所述发光区域中各所述发光 子区域的扫描顺序为从下到上顺序扫描。
另一方面，本公开实施例还提供了一种显示装置的驱动方法，包括：
根据设定的显示区扫描方向对显示面板进行显示驱动；
采用本公开上述背光模组的控制方法对背光模组进行显示驱动。
附图说明
图1为本公开一些实施例提供的显示面板的背光模组的结构示意图；
图2为本公开一些实施例提供的显示面板的背光模组的结构示意图；
图3为本公开一些实施例提供的显示面板的背光模组的结构示意图；
图4为本公开一些实施例提供的显示面板的背光模组中发光子区域划分的结构示意图；
图5为本公开一些实施例提供的显示面板的背光模组中发光组划分的结构示意图；
图6为本公开一些实施例提供的显示装置的结构示意图；
图7为本公开一些实施例提供的背光调节电路向电流控制电路进行数据传输的时序图；
图8为本公开一些实施例提供的两个发光区域的结构划分示意图；
图9为本公开一些实施例提供的两个电流控制电路对两个发光区域进行控制的时序图。
具体实施方式
为了使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开作进一步地详细描述，显然，所描述的实施例仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本公开保护的范围。
下面结合附图，对本公开实施例提供的背光模组、其控制方法及显示装置的具体实施方式进行详细地说明。
本公开实施例提供的一种背光模组，如图1所示，包括：
背光源1，背光源1分为多个发光区域，每个发光区域包括多个发光器件；各发光区域中的发光器件相互独立；
背光控制电路7，如图2和图3所示，背光控制电路7包括与各发光区域一一对应的多个电流控制电路2，以及与各电流控制电路2均连接的背光调节电路3；
背光调节电路3被配置为根据显示面板的显示区扫描方向确定电流控制电路2的工作顺序；
电流控制电路2被配置为根据背光调节电路2确定的工作顺序，在显示区中与发光器件对应的区域被扫描时，控制发光器件发光。
具体地，本公开实施例提供的上述背光模组，通过对背光源1进行发光区域的划分，使各发光区域中的发光器件相互独立，即各发光区域中的发光器件之间不存在电连接关系。并对每个发光区域配置驱动其发光的电流控制电路2，背光模组1中的各发光区域与电流控制电路2一一对应设置，即一个电流控制电路2独立控制一个发光区域，该种设置方式有效的缓解了相关技术中只设置一个电流控制电路2，通过一个电流控制电路2控制背光模组，导致电流控制电路2处理数据量过大的问题。并且，在发光区域对应的显示区的区域被扫描时，电流控制电路2可以控制发光区域内的发光器件发光，而显示面板中没有进行扫描的区域对应的发光区域不进行发光，从而大大减少了背光源1中每个发光器件的发光时间，从而节省了大量的电能。并且，通过对发光区域的分时驱动配合显示面板的扫描模式，可以在3D显示时减少左右眼之间的串扰。
需要说明的是，背光源1包括多个发光区域是指背光源可以包括m行×n列多个发光区域，其中，m为大于等于2的整数，n为正整数。并且，m一般为偶数，n一般为大于或等于2的整数。
具体地，图3是以4个发光区域为例进行说明的，4个发光区域分别为第一发光区域1a、第二发光区域1b、第三发光区域1c和第四发光区域1d；与 各发光区域一一对应的电流控制电路2包括：控制第一发光区域1a的第一电流控制电路2a，控制第二发光区域1b的第二电流控制电路2b，控制第三发光区域1c的第三电流控制电路2c，以及控制第四发光区域1d的第四电流控制电路2d。
具体地，背光源1中包括的发光区域的个数和排布方式可以根据实际需要而定，上述仅是一种实施方式，在此不作限定。
需要说明的是，在本公开实施例提供的上述背光模组中，电流控制电路2可以被配置为仅在显示面板与电流控制电路2所控制的发光区域对应的区域被扫描时，控制对应的发光区域内的发光器件发光。并且，为了保证显示面板所显示的图像的均匀性，在该发光区域对应的显示面板的区域被扫描之后的一段时间，可以使该发光区域内的发光器件发的光还会有一个适当的延迟，其中，延迟的时间可以根据显示面板的尺寸和人眼视觉分辨时间等参数进行设定。
可选地，在本公开实施例提供的上述背光模组中，如图4所示，可以将各发光区域分为在列方向排列且沿着行方向延伸的多个发光子区域11，各发光子区域11均包括至少一个发光器件，且每一发光子区域11对应于显示面板中的至少一行像素；
背光调节电路3还被配置为根据显示面板的显示区扫描方向确定发光区域中各发光子区域11的扫描顺序；
电流控制电路2被具体配置为根据发光子区域11的扫描顺序，在发光子区域11对应的行像素被扫描时，控制发光子区域11内的发光器件发光。
具体地，将每个发光区域再进行划分，即将每个发光区域再进行细化，使各发光区域分为在列方向排布的多个发光子区域11时，可以在与各发光子区域11对应的行像素被扫描时，各发光子区域11内的发光器件才进行发光，而没有被扫描的行像素对应的发光子区域11内的发光器件不发光，从而进一步的减少了在显示面板进行显示时，背光源1中各发光器件的发光时间，节约了背光源1对电能的消耗。
需要说明的是，在本公开实施例提供的上述背光模组中，为了保证显示面板所显示的图像的均匀性，在该发光子区域11对应的显示面板的区域被扫描之后的一段时间，可以使该发光子区域11内的发光器件发的光还会有一个适当的延迟，其中，延迟的时间可以根据显示面板的尺寸和人眼视觉分辨时间等参数进行设定。
可选地，在本公开实施例提供的上述背光模组中，如图5所示，各发光子区域11可以包括在行方向排列的多个发光组12，各发光组12包括一个或串联的多个发光器件；每一发光组12对应于显示面板中的一个或多个像素；
电流控制电路2被具体配置为当发光组12对应的像素被扫描时，控制发光组12内的发光器件发光。
具体地，在本公开实施例提供的上述背光模组中，通过将每个发光子区域11再进行细分，将每个发光子区域11划分为多个发光组12，通过电流控制电路2对每个发光组12进行分时驱动，即当各发光组12对应的像素被扫描时，电流控制电路2控制发光组12内的发光器件发光，而各发光组12对应的像素未被扫描时，各发光组12中的发光器件不发光。这种驱动方式使背光源1中的每个发光器件的点亮时间得到了大大的缩减，从而达到了节约能源的目的。
需要说明的是，在本公开实施例提供的上述背光模组中，为了保证显示面板所显示的图像的均匀性，在该发光组12对应的显示面板的区域被扫描之后的一段时间，可以使该发光组12内的发光器件发的光还会有一个适当的延迟，其中，延迟的时间可以根据显示面板的尺寸和人眼视觉分辨时间等参数进行设定。
可选地，在本公开实施例提供的上述背光模组中，电流控制电路2被具体配置为根据发光组12对应的像素的灰阶值，控制发光组12的工作电流。这样可以根据显示所需的灰阶，调节对应发光组12的亮度，从而提高显示对比度。
可选地，在本公开实施例提供的上述背光模组中，背光调节电路3还被 配置为根据每一帧待显示图像数据，确定发光组12对应的亮度值；
电流控制电路2具体被配置为根据背光调节电路3确定的发光组12对应的亮度值，生成控制发光组12发光的工作电流。
具体地，为了增加显示画面的对比度，背光调节电路3根据与各发光组12对应像素待显示的图像的灰度值，计算出各发光,12对应的应发出的亮度值，电流控制电路2将背光调节电路3确定的发光组12对应的亮度值，生成控制发光组发光的电流，在对应的像素进行扫描时，电流控制电,2控制与该扫描像素对应的各发光组12发出对应亮度值的光，这样可以增加图像个区域之间的对比度，使画面显示更加清晰逼真。
可选地，在本公开实施例提供的上述背光模组中，如图6所示，背光调节电路3可以通过串行外设接口6与电流控制电路2连接；
其中，串行外设接口6一般包括一个输入端和多个输出端；
输入端与背光调节电路3连接，多个输出端分别通过总线8与电流控制电路2连接。
可选地，在本公开实施例提供的上述背光模组中，总线8具体包括：时钟信号线、数据信号线和边界区分信号线；
时钟信号线被配置为传输时钟信号；
数据信号线被配置为传输发光区域所对应的亮度值；
边界区分信号线被配置为传输控制电流控制电路2工作状态的控制信号。
基于同一发明构思，本公开实施例还提供了一种上述背光模组的控制方法，该方法包括：
背光调节电路根据显示面板的显示区扫描方向确定电流控制电路的工作顺序；
在显示区中发光器件对应的区域被扫描时，电流控制电路控制发光器件发光。
可选地，在本公开实施例提供的上述背光模组的控制方法中，当发光区域分为多个发光子区域时，还包括：背光调节电路根据显示面板的显示区扫 描方向确定发光区域中各发光子区域的扫描顺序；
在显示区中发光器件对应的区域被扫描时，电流控制电路控制发光器件发光，具体包括：当发光子区域对应的行像素被扫描时，电流控制电路控制发光子区域内的发光器件发光。
可选地，在本公开实施例提供的上述背光模组的控制方法中，当发光子区域包括多个发光组时，当发光子区域对应的行像素被扫描时，电流控制电路控制发光子区域内的发光器件发光，具体包括：
当发光组对应的像素被扫描时，电流控制电路控制发光组内的发光器件发光。
可选地，在本公开实施例提供的上述背光模组的控制方法中，电流控制电路控制发光组内的发光器件发光，具体包括：
电流控制电路根据发光组对应的像素的灰阶值，控制发光组的工作电流。
可选地，在本公开实施例提供的上述背光模组的控制方法中，电流控制电路根据发光组对应的像素的灰阶值，控制发光组的工作电流，具体包括：
背光调节电路根据每一帧待显示图像数据，确定发光组对应的亮度值；
电流控制电路根据背光调节电路确定的发光组对应的亮度值，生成控制发光组发光的工作电流。
可选地，在本公开实施例提供的上述背光模组的控制方法中，在2D显示模式下，显示面板的显示区扫描方向为从上到下逐行扫描；背光调节电路确定电流控制电路的工作顺序为从上到下顺序工作，且确定发光区域中各发光子区域的扫描顺序为从上到下顺序扫描；
在3D显示模式下，显示面板的显示区扫描方向为从上下两端到中间逐行扫描；背光调节电路确定电流控制电路的工作顺序为从上下两端到中间顺序工作，且确定位于上半部的发光区域中各发光子区域的扫描顺序为从上到下顺序扫描，位于下半部的发光区域中各发光子区域的扫描顺序为从下到上顺序扫描。
具体地，上下两端到中间逐行扫描具体为：先扫第一行，再扫最后一行， 然后再扫第二行，再扫倒数第二行，以这样的顺序进行扫描，以避免相邻两行发生串扰。
具体地，在3D显示模式和2D显示模式下，背光模组的扫描方式是依据显示面板的显示区的扫描方式进行设置。
下面以背光源1包括4个发光区域，每个发光区域包括呈行方向排列的5个发光子区域，每个发光子区域包括6个发光组为例，对上述背光模组及其控制方法进行具体阐述：
如图6所示，显示面板5可以分为四个显示区域，分别为第一显示区域5a、第二显示区域5b、第三显示区域5c和第四显示区域5d，各显示区域根据图像数据处理控制电路4发送的图像数据进行分区域的逐行显示，即第一显示区域5a、第二显示区域5b、第三显示区域5c和第四显示区域5d依次进行显示，每个显示区域内逐行进行像素的扫描；背光调节电路3根据图像数据处理控制电路4发送的每一帧待显示图像的灰度值确定各背光源1中的各发光组12应发出的亮度值。
背光调节电路3通过串行外设接口6和总线8将计算出的背光源1各发光区域的亮度值传输给与各发光区域对应的电流控制电路2。电流控制电路2包括第一电流控制电路2a、第二电流控制电路2b、第三电流控制电路2c和第四电流控制电路2d。
背光调节电路3通过串行外设接口6向各电流控制电路发送数据的时序，如图7所示，当向第一电流控制电路2a输入的控制信号CSI为低电平信号时，将与第一电流控制电路2a对应的数据发送给第一电流控制电路2a；当向第二电流控制电路2b输入的控制信号CSII为低电平信号时，将与第二电流控制电路2b对应的数据发送给第二电流控制电路2b；当向第三电流控制电路2c输入的控制信号CSIII为低电平信号时，将与第三电流控制电路2c对应的数据发送给第三电流控制电路2c；当向第四电流控制电路2d输入的控制信号CSIV为低电平信号时，将与第四电流控制电路2d对应的数据发送给第四电流控制电路2d。上述以低电平为有效信号进行控制为例，当然，有效信号也可为高 电平信号，在此不作限定。
具体地，每个电流控制电路2接收的数据包括32个字节，由于每个电流控制电路2对应的发光区域包括30个发光组12，每个电流控制电路2至少包括30个输出引脚，每个输出引脚对应连接一个发光组12，其中，每个发光组12的亮度值对应1个字节，在30个发光组字节之前包括1个设备识别标识的字节，在30个发光组字节之后包括1个校验字节，用来验证数据传输的正确性。
在电流控制电路2对发光区域进行控制时，一个电流控制电路2对应一个发光区域，如图6所示，第一电流控制电路2a控制第一发光区域1a，第二电流控制电路2b控制第二发光区域1b，第三电流控制电路2c控制第三发光区域1c，第四电流控制电路2g控制第四发光区域1d。该种设置方式可以减少单个电流控制电路的数据处理量，从而降低了对单个电流控制电路处理能力的要求。
由于在进行图像显示时各显示区域内的像素是逐行进行扫描的，因此，为配合显示面板中各显示区域的显示，背光源1的每个发光区域也采用逐行扫描的形式，以第一电流控制电路2a和第二电流控制电路2b分别控制第一发光区域1a和第二发光区域1b为例进行说明，如图8所示，每个发光区域包括5行发光子区域11，每个发光子区域11包括6个发光组12，即每个发光区域包括30个发光组12，每个发光组12包括1个或者多个串联的发光器件。对每个发光区域进行控制的具体时序如图9所示，L1、L2、L3、L4和L5是依次进行信号输入，使位于L1、L2、L3、L4和L5的发光子区域逐行进行发光，即每个发光区域内是以发光子区域11为单位逐次进行发光；L1、L2、L3、L4和L5所在的发光区域逐行进行发光完毕时，下一个发光区域开始进行逐行发光，即依次向R1、R2、R3、R4和R5输入信号，使位于R1、R2、R3、R4和R5的发光子区域逐行进行发光。
在背光源1中每个发光区域进行逐个发光，在视屏源为2D信号的情况下，由于在2D显示模式下，图像显示时各显示区域内的像素是从上到下逐行进行 扫描的，因此，在每个发光区域内，每个发光子区域11从上到下进行逐行扫描。当视屏源信号为3D信号时，由于在3D显示模式下，图像显示时，第一显示区域5a和第二显示区域5b内的像素是从上到下逐行进行扫描的，第三显示区域5c和第四显示区域5d内的像素是从下到上进行扫描的，因此，第一发光区域1a和第二发光区域1a从上到下逐行进行扫描，第三发光区域1c和第四发光区域1d从下到上逐行扫描，这种扫描方式能够在降低能耗的同时，降低左右眼之间的串扰，使图像显示更加的逼真。
通常每个发光子区域11对应显示面板的多行像素，只有在对应的多行像素全部扫描完毕后，该发光子区域11才关闭，以避免在像素进行逐行扫描时，发光子区域11频繁的进行开关操作。其中，背光源1全屏刷新所用的时间远远小于刷新一帧像素所用的时间，例如，背光源1包括4个发光区域，每个发光区域包含该32个字节，每个字节包括8bit，并且具有4MHZ的刷新屏率，则整个背光源1刷新一次的时间为：1/4000000*32*8*4＝0.256ms，而刷新一帧图像所需要的时间为1/60＝16.67ms，由此可见背光源1全屏刷新所用的时间远远小于刷新一帧像素所用的时间，即背光源1所具有的刷新能力大于每一帧图像的刷新能力.因此，不会出现像素刷新时背光源1没有打开的情况，有效的保证了图像的正常显示。
并且，以每个发光区域包含5行发光子区域，一帧包含1920*1080个像素为例，每一行加上空白像素一共是1125个像素，则各发光区域中的每行发光子区域11开启时间为：1/60/1125*1080/5＝0.0032s，以满足发光子区域11对应的显示区域的像素已经扫描完后才将该发光子区域关闭，保证了显示质量。
基于同一发明构思，本公开实施例还提供了一种显示装置，包括显示面板和背光模组，该背光模组为上述任一种背光模组。该显示装置可以为：液晶显示面板、大型户外广告宣传面板等任何有节能需要的液晶显示装置。由于该显示装置解决问题的原理与前述一种背光模组相似，该显示装置的实施可以参见上述背光模组的实施例，重复之处不再赘述。
基于同一发明构思，本公开实施例还提供了一种显示装置的驱动方法，由于该驱动方法解决问题的原理与前述一种背光模组的控制方法相似，该驱动方法的实施可以参见上述控制方法的实施例，重复之处不再赘述。
具体地，本公开实施例提供的一种显示装置的驱动方法，具体包括：
根据设定的显示区扫描方向对显示面板进行显示驱动；
采用本公开上述背光模组的控制方法对背光模组进行显示驱动。
本公开实施例提供的上述一种背光模组、其控制方法及显示装置、其驱动方法，通过对背光源进行发光区域的划分，并对每个发光区域配置驱动其发光的电流控制电路，背光模组中的各发光区域与电流控制电路一一对应设置，即一个电流控制电路独立控制一个发光区域，该种设置方式有效的缓解了相关技术中只设置一个电流控制电路，通过一个电流控制电路控制背光模组，导致电流控制电路处理数据量过大的问题。并且，在发光区域对应的显示区的区域被扫描时，电流控制电路可以控制发光区域内的发光器件发光，而显示面板中没有进行扫描的区域对应的发光区域不进行发光，从而大大减少了背光源中每个发光器件的发光时间，从而节省了大量的电能。并且，通过对发光区域的分时驱动配合显示面板的扫描模式，可以在3D显示时减少左右眼之间的串扰。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (16)

  1. 一种背光模组，其中，包括：
    背光源，所述背光源分为多个发光区域，每个所述发光区域包括多个发光器件；各所述发光区域中的发光器件相互独立；
    背光控制电路，所述背光控制电路包括与各所述发光区域一一对应的多个电流控制电路，以及与各所述电流控制电路均连接的背光调节电路；所述背光调节电路被配置为根据显示面板的显示区扫描方向确定所述电流控制电路的工作顺序；所述电流控制电路被配置为根据所述背光调节电路确定的工作顺序，在所述显示区中与所述发光器件对应的区域被扫描时，控制所述发光器件发光。
  2. 如权利要求1所述的背光模组，其中，在各所述发光区域分为在列方向排列且沿着行方向延伸的多个发光子区域，各所述发光子区域均包括至少一个发光器件，每一所述发光子区域对应于所述显示面板中至少一行像素；
    所述背光调节电路还被配置为根据显示面板的显示区扫描方向确定所述发光区域中各所述发光子区域的扫描顺序；
    所述电流控制电路被具体配置为根据所述发光子区域的扫描顺序，在所述发光子区域对应的行像素被扫描时，控制所述发光子区域内的所述发光器件发光。
  3. 如权利要求2所述的背光模组，其中，各所述发光子区域包括在行方向排列的多个发光组，各所述发光组包括一个或串联的多个所述发光器件；
    所述电流控制电路被具体配置为当所述发光组对应的像素被扫描时，控制所述发光组内的所述发光器件发光。
  4. 如权利要求3所述的背光模组，其中，所述电流控制电路被具体配置为根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流。
  5. 如权利要求4所述的背光模组，其中，所述背光调节电路还被配置为根据每一帧待显示图像数据，确定所述发光组对应的亮度值；
    所述电流控制电路具体被配置为根据所述背光调节电路确定的所述发光组对应的亮度值，生成控制所述发光组发光的工作电流。
  6. 如权利要求1所述的背光模组，其中，所述背光调节电路通过串行外设接口与各所述电流控制电路连接；
    其中，所述串行外设接口包括一个输入端和多个输出端；
    所述输入端与所述背光调节电路连接，多个所述输出端分别通过总线与所述电流控制电路连接。
  7. 如权利要求6所述的背光模组，其中，所述总线包括：时钟信号线、数据信号线和边界区分信号线；
    所述时钟信号线被配置为传输时钟信号；
    所述数据信号线被配置为传输所述发光区域对应的亮度值；
    所述边界区分信号线被配置为传输控制所述电流控制电路工作状态的控制信号。
  8. 如权利要求3-7任一项所述的背光模组，其中，所述背光源分为2*2个所述发光区域，每个所述发光区域分为5个所述发光子区域，每个所述发光子区域包括6个所述发光组。
  9. 一种显示装置，其中，包括显示面板和背光模组，所述背光模组为如权利要求1-8任一项所述的背光模组。
  10. 一种如权利要求1-8任一项所述的背光模组的控制方法，其中，包括：
    背光调节电路根据显示面板的显示区扫描方向确定所述电流控制电路的工作顺序；
    在所述显示区中发光器件对应的区域被扫描时，所述电流控制电路控制所述发光器件发光。
  11. 如权利要求10所述的背光模组的控制方法，其中，当所述发光区域分为多个发光子区域时，还包括：所述背光调节电路根据显示面板的显示区扫描方向确定所述发光区域中各所述发光子区域的扫描顺序；
    在所述显示区中发光器件对应的区域被扫描时，所述电流控制电路控制 所述发光器件发光，具体包括：当所述发光子区域对应的行像素被扫描时，所述电流控制电路控制所述发光子区域内的所述发光器件发光。
  12. 如权利要求11所述的背光模组的控制方法，其中，当所述发光子区域包括多个发光组时，当所述发光子区域对应的行像素被扫描时，所述电流控制电路控制所述发光子区域内的所述发光器件发光，具体包括：
    当所述发光组对应的像素被扫描时，所述电流控制电路控制所述发光组内的所述发光器件发光。
  13. 如权利要求12所述的背光模组的控制方法，其中，所述电流控制电路控制所述发光组内的所述发光器件发光，具体包括：
    所述电流控制电路根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流。
  14. 如权利要求13所述的背光模组的控制方法，其中，所述电流控制电路根据所述发光组对应的像素的灰阶值，控制所述发光组的工作电流，具体包括：
    所述背光调节电路根据每一帧待显示图像数据，确定所述发光组对应的亮度值；
    所述电流控制电路根据所述背光调节电路确定的所述发光组对应的亮度值，生成控制所述发光组发光的工作电流。
  15. 如权利要求11-14任一项所述的背光模组的控制方法，其中，在2D显示模式下，所述显示面板的显示区扫描方向为从上到下逐行扫描；所述背光调节电路确定所述电流控制电路的工作顺序为从上到下顺序工作，且确定所述发光区域中各所述发光子区域的扫描顺序为从上到下顺序扫描；
    在3D显示模式下，所述显示面板的显示区扫描方向为从上下两端到中间逐行扫描；所述背光调节电路确定所述电流控制电路的工作顺序为从上下两端到中间顺序工作，且确定位于上半部的所述发光区域中各所述发光子区域的扫描顺序为从上到下顺序扫描，位于下半部的所述发光区域中各所述发光子区域的扫描顺序为从下到上顺序扫描。
  16. 一种显示装置的驱动方法，其中，包括：
    根据设定的显示区扫描方向对显示面板进行显示驱动；
    采用如权利要求10-15任一项所述的背光模组的控制方法对背光模组进行显示驱动。
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