WO2020056893A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2020056893A1
WO2020056893A1 PCT/CN2018/115291 CN2018115291W WO2020056893A1 WO 2020056893 A1 WO2020056893 A1 WO 2020056893A1 CN 2018115291 W CN2018115291 W CN 2018115291W WO 2020056893 A1 WO2020056893 A1 WO 2020056893A1
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Prior art keywords
sub
brightness
backlight
signal
driving voltage
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PCT/CN2018/115291
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English (en)
French (fr)
Inventor
康志聪
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US17/043,093 priority Critical patent/US11205393B2/en
Publication of WO2020056893A1 publication Critical patent/WO2020056893A1/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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2025—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having all the same time duration
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—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 using liquid crystals
    • G09G3/3607—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 using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display, and in particular, to a display device and a driving method thereof.
  • VA vertical alignment
  • IPS In-Plane Switching, IPS
  • An improved solution is to display each frame of image through two sub-frames before and after (for example, a 60Hz image is displayed by two 120Hz sub-frames in front and back), and the pixel driving voltage of one sub-frame is high, and the other
  • the pixel driving voltage of one subframe is a low voltage (high and low only indicate the relative difference between the pixel driving voltages of two subframes).
  • a display device and a driving method thereof are provided.
  • a driving method for a display device includes: dividing a red, green, and blue three-color backlight source of the display device into a plurality of regions, and pixels of the display device are divided into blocks corresponding to the regions of the backlight source one-to-one; Independently control the light intensity of each color light source in each area; obtain the input signal of each frame of image to be displayed, and the high voltage signal and low voltage signal of the driving voltage of each sub-pixel of the display device; according to the high voltage The signal and the low-voltage signal display each frame of the image through two sub-frames before and after, and each sub-frame drives the adjacent two sub-pixels in each of the blocks with a high voltage and a low voltage, and each sub-pixel is in two sub-frames.
  • the driving voltage in is one high and one low; according to the average driving voltage of each color sub-pixel in each said region, the size of the backlight brightness compensation signal corresponding to each sub-frame of each color light source in each said region is determined. , The higher the average driving voltage is, the smaller the backlight brightness compensation signal is, and the lower the average driving voltage is, the larger the backlight brightness compensation signal is, in order to alleviate each Said region luminance difference of the two sub-frame; and the brightness of each color light source compensation signal to adjust the backlight luminance of each zone.
  • a display device includes: a display panel; a backlight circuit including a backlight source and a partition control unit; the backlight source is a red, green, and blue three-color backlight source; and the partition control unit is configured to divide the backlight source into a plurality of backlight sources.
  • Areas each of which includes three light sources of red, green, and blue light sources, the zone control unit is also used to independently control the brightness of each light source in each area, and the pixels in the display panel are divided A block corresponding to the area of the backlight circuit one by one; and a driving circuit including: an input circuit for acquiring an input signal of each frame of image to be displayed, and acquiring a high voltage of a driving voltage of each sub-pixel of the display device Signals and low voltage signals; a frame display circuit is configured to display each frame of image through two sub-frames before and after according to the high-voltage signal and low-voltage signal, and each sub-frame is adjacent to two within each of the blocks.
  • the driving voltage of each sub-pixel is one high and one low, and the driving voltage of each sub-pixel in two sub-frames is one high and one low;
  • the backlight compensation determining circuit is configured to The average driving voltage of each color sub-pixel within the region, determine the size of the backlight brightness compensation signal corresponding to two sub-frames of each color light source in each said area, the higher the average driving voltage, the smaller the backlight brightness compensation signal, The lower the average driving voltage is, the larger the backlight brightness compensation signal is to alleviate the brightness difference of each of the regions in the two subframes; and a backlight brightness adjustment circuit is configured to adjust each of the areas according to the backlight brightness compensation signal. The brightness of each area of each color light source.
  • a display device wherein the display device is a liquid crystal display and includes:
  • the backlight circuit includes a backlight source and a partition control unit.
  • the backlight source is a red, green, and blue three-color backlight source.
  • the partition control unit is configured to divide the backlight source into multiple regions, and each of the regions includes red.
  • the light source, the green light source, and the blue light source are three types of light sources; the zone control unit is further configured to independently control the light output brightness of each area; the pixels in the display panel are divided into blocks corresponding to the areas of the backlight circuit on a one-to-one basis; and
  • An input circuit for acquiring an input signal of each frame of image to be displayed, and acquiring a high voltage signal and a low voltage signal of a driving voltage of each sub-pixel of the display device;
  • a frame display circuit is configured to display each frame image through two sub-frames before and after according to the high-voltage signal and the low-voltage signal, and the driving voltage of each sub-frame to two adjacent sub-pixels in each of the blocks is One high and one low, the driving voltage of each sub-pixel in two subframes is one high and one low;
  • a reference backlight brightness circuit configured to obtain a reference backlight brightness signal corresponding to each frame of image
  • Backlight compensation determining circuit configured to count the average driving voltage of all target color sub-pixels in each of the regions in one sub-frame, the average driving voltage in another sub-frame, and the average driving voltage of high-voltage signals And the average driving voltage of the low-voltage signal, and calculate the size of the backlight brightness compensation signal corresponding to two sub-frames of each color light source in each of the areas according to the following formula:
  • a M_R * R M_ave_H + A M_R * R M_ave_L A M_R1 * R M_ave1 + A M_R2 * R M_ave2 ;
  • a M_R1 * R M_ave1 A M_R2 * R M_ave2 ;
  • M represents the serial number of the area
  • a M_R represents the brightness value of the reference backlight brightness signal of the red light source
  • a M_R1 represents the backlight brightness of the red light source in the area M corresponding to the first subframe of the two subframes.
  • the brightness value of the compensation signal represents the brightness value of the backlight brightness compensation signal of the red light source corresponding to the second subframe in the two subframes in the region M
  • R M_ave1 represents the red subframe in the first subframe in the region M.
  • R M_ave2 represents the average value of the driving voltage of the pixel of the second subframe in the red sub-region M
  • R M_ave_H represents the red sub-pixel corresponding to the high voltage signal in the subframe area M
  • R M_ave_L represents the average value of the driving voltage of the red sub-pixels in the region M of the subframe corresponding to the low-voltage signal
  • a M_G * G M_ave_H + A M_G * G M_ave_L A M_G1 * G M_ave1 + A M_G2 * G M_ave2 ;
  • a M_G1 * G M_ave1 A M_G2 * G M_ave2 ;
  • M represents the serial number of the area
  • a M_G represents the brightness value of the reference backlight brightness signal of the green light source
  • a M_G1 represents the backlight brightness of the green light source in the area M corresponding to the first subframe of the two subframes.
  • a M_G2 represents the brightness value of the backlight brightness compensation signal corresponding to the green light source of the second subframe in the region M of the two subframes
  • G M_ave1 represents the green subframe of the first subframe in the region M the average value of the driving voltage of the pixel
  • G M_ave2 represents the average of the green sub-pixel driving voltage of the second subframe in the region of the M
  • G M_ave_L represents the average value of the driving voltage of the green sub-pixels in the region M of the subframe corresponding to the low-voltage signal;
  • a M_B * B M_ave_H + A M_B * B M_ave_L A M_B1 * B M_ave1 + A M_B2 * B M_ave2 ;
  • a M_B1 * B M_ave1 A M_B2 * B M_ave2 ;
  • M is the sequence number area
  • a M_B represents the luminance value of the reference signal
  • a M_B1 represents two subframes corresponding to the first subframe of the blue light source region M
  • a M_B2 represents the brightness value of the backlight brightness compensation signal of the blue light source corresponding to the second subframe in the two subframes in the region M
  • B M_ave1 represents the first subframe in the region M.
  • B M_ave2 represents the average value of the driving voltage of the blue sub-pixels in the region M in the second sub-frame
  • B M_ave_H represents the sub-frame corresponding to the high-voltage signal in the region M.
  • An average value of the driving voltage of the blue sub-pixels within the range, and B M_ave_L represents an average value of the driving voltage of the blue sub-pixels in the region M in the subframe corresponding to the low-voltage signal;
  • the backlight brightness adjustment circuit is configured to adjust the light output brightness of each color light source in each area according to the backlight brightness compensation signal.
  • the above display device and its driving method display each frame image through two sub-frames before and after, each frame image is driven by a high-low voltage signal, and the high-low driving voltages of the first frame image and the second frame image are reversed. , And generate a backlight brightness adjustment signal for the next picture according to the average driving voltage of the target color sub-pixels in each area, in order to alleviate the difference in brightness of the same pixel in two sub-frames, thereby reducing the driving voltage fluctuations caused by the two sub-frames. Flicker.
  • the partition control unit divides the backlight circuit into a plurality of regions that can independently control the brightness of the light.
  • the pixels of different blocks on the display panel can be individually compensated for backlight brightness, which is better than a backlight circuit that uses a uniform backlight brightness. Anti-flicker effect.
  • the pixels of the liquid crystal display do not need to be further divided into primary and secondary sub-pixels, which can greatly reduce the process complexity of the display panel, and greatly improve the transmittance and analysis of the liquid crystal display panel Degree, reducing the cost of backlight design.
  • FIG. 1 is a flowchart of a driving method of a display device according to an embodiment
  • FIG. 2 is a schematic diagram of a backlight circuit of a liquid crystal display suitable for a driving method of a display device in an embodiment
  • FIG. 3 is a schematic diagram of driving the display device in FIG. 2;
  • FIG. 4 is a partially enlarged view of FIG. 3;
  • FIG. 5 is another partial enlarged view of FIG. 3;
  • FIG. 6 is a schematic diagram of performing a spatial low-pass smoothing filtering process on a backlight brightness compensation value in an embodiment
  • FIG. 7 is a structural block diagram of a driving circuit in an embodiment.
  • the display device to which the display device driving method of the present application is applicable may be a liquid crystal display such as TN (Twisted Nematic), VA (Vertical Alignment), OCB (Optically Compensated Curved Alignment), but is not limited thereto.
  • the backlight of the liquid crystal display can use direct or side backlight, and the backlight source is a three-color RGB (red, green and blue) backlight source. This driving method is also applicable to the case where the liquid crystal display is a curved screen.
  • FIG. 2 is a schematic diagram of a backlight circuit of a display device according to an embodiment.
  • the backlight circuit 100 includes a backlight source and a zone control unit.
  • the light of the backlight source causes the backlight circuit 100 to appear in a matrix arrangement under the control of the zone control unit.
  • FIG. 1 is a flowchart of a driving method of a display device according to an embodiment, including the following steps:
  • the liquid crystal display obtains an input signal of each frame image to be displayed from an external device, such as a graphics processing unit (GPU).
  • the liquid crystal display also obtains a reference backlight brightness according to the input signal (for controlling the light output brightness of the backlight source, which can be represented by a reference backlight brightness signal), and the brightness is the backlight brightness of the backlight source without backlight compensation.
  • an exemplary technique is to display each frame image through two sub-frames before and after, that is, to divide a frame image into two frames in time sequence, and record them as the first frame and the second frame, respectively.
  • An image corresponding to the input signal is displayed to the user through the first frame and the second frame to compensate each other.
  • the driving voltage of each pixel on the first frame is greater than the driving voltage of the corresponding sub-pixel on the second frame. That is, the first frame is driven with a high driving voltage, and the second frame is driven with a lower driving voltage than the first frame.
  • the driving voltage of each sub-pixel of the first frame and the second frame can be obtained by using a lookup table (LUT, Look Up Table). Specifically, the look-up table is stored in a frame buffer in the liquid crystal display in advance.
  • the lookup table is a correspondence table between the voltage of the input signal and the driving voltage of each sub-pixel of the first frame and the second frame corresponding to the input signal.
  • the color gray value of each R / G / B input signal 0 to 255 corresponds to 256 pairs of high and low voltage signals, and a total of 3 * 256 pairs of high voltage signals R TH / G TH / B TH With low voltage signal R TL / G TL / B TL . Therefore, according to the color gray value of each sub-pixel in the input signal, a high voltage signal and a low voltage signal corresponding to the driving voltage can be found.
  • S120 Display each frame of image through two sub-frames before and after according to the high-voltage signal and the low-voltage signal.
  • each frame of the image is also divided into two frames of images, which are respectively recorded as the first and second subframes.
  • the driving voltage of two adjacent sub-pixels in each block on each subframe is one. High-low, and the driving voltage of each sub-pixel in two sub-frames is high-low. That is, the driving voltage of each sub-pixel of the first sub-frame is inverted to form the driving voltage of each sub-pixel of the second sub-frame.
  • the driving voltage of each sub-pixel in the first sub-frame and the second sub-frame can be obtained by using a look-up table (LUT, Look UP Table). Therefore, according to the color gray value of each sub-pixel in the input signal, a high-voltage signal and a low-voltage signal corresponding to the driving voltage can be found, so that the high-voltage signal is used to drive the corresponding sub-pixel in the first sub-frame, and the low-voltage is used.
  • the signal drives the corresponding sub-pixel in the second sub-frame, or the low-voltage signal drives the corresponding sub-pixel in the second sub-frame, and the high-voltage signal drives the corresponding sub-pixel in the second sub-frame.
  • Adjacent two sub-pixels are driven by a high-low driving voltage driving method. As shown in FIG. 3, the pixels on the display panel are enlarged in FIG. 3.
  • FIG. 4 is a partially enlarged view of the first subframe in FIG. 3
  • FIG. 5 is a partially enlarged view of the second subframe in FIG. 3.
  • the driving voltage of any two adjacent sub-pixels in each block is one high and one low.
  • S130 Determine the size of the backlight brightness compensation signal of the two sub-frames according to the average driving voltage of each color sub-pixel in each area.
  • the two backlight brightness compensation signals of each color backlight source in each area 10 are each used to adjust the backlight brightness of a sub-frame to reduce the viewing angle deviation of the picture.
  • the average driving voltage of the red, green, and blue sub-pixels in each region in one region 10 is obtained. The higher the average driving voltage of each color sub-pixel in an area 10 of each sub-frame, the smaller the backlight brightness compensation signal of the sub-frame in order to alleviate the difference in brightness between the two sub-frames of each area 10.
  • S140 Adjust the light output brightness of each color light source in each area according to the backlight brightness compensation signal.
  • the driving method of the above display device displays each frame image through two sub-frames before and after, each frame image is driven by a high-low voltage signal, and the high-low driving voltages of the first frame image and the second frame image are reversed. And according to the average driving voltage of each color sub-pixel in each area, the backlight brightness adjustment signal of the next picture is generated to alleviate the brightness difference of the same pixel in the two sub-frames, thereby reducing the driving voltage fluctuations caused by the two sub-frames. Flicker.
  • the partition control unit divides the backlight circuit into a plurality of regions that can independently control the brightness of the light.
  • the pixels of different blocks on the display panel can be individually compensated for backlight brightness, which is better than a backlight circuit that uses a uniform backlight brightness. Anti-flicker effect.
  • the pixels of the liquid crystal display do not need to be further divided into primary and secondary sub-pixels, which can greatly reduce the process complexity of the display panel, and greatly improve the transmittance and analysis of the liquid crystal display panel Degree, reducing the cost of backlight design.
  • step S140 is to perform backlight brightness compensation on the next frame image, that is, the backlight brightness of the currently displayed frame image is calculated based on the previous frame image. Since the two adjacent frames are generally the same, it is reasonable to compensate the backlight brightness based on the previous frame.
  • step S130 is implemented in the following manner:
  • Constraints of the calculation is: The A M_P1, after the brightness A M_P2 adjustment region M, region M luminance of two sub-frames convergence; and region M of two subframes luminance and the obtained according to A M_P and P M_ave_H
  • the sum of the brightness of the sub-frame (ie, the first frame described in step S110) and the brightness of the sub-frame (ie, the second frame described in step S110) obtained according to A M_P and PM_ave_L tend to be consistent.
  • the target color sub-pixels are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel, that is, the red sub-pixel, the green sub-pixel, and the blue sub-pixel need to be obtained for the above parameters. Specifically, it is calculated according to the following formula:
  • a M_R * R M_ave_H + A M_R * R M_ave_L A M_R1 * R M_ave1 + A M_R2 * R M_ave2 ;
  • a M_R1 * R M_ave1 A M_R2 * R M_ave2 ;
  • M is the number field 10
  • a M_R represents a luminance value of the red light source reference backlight luminance signal
  • a M_R1 represents two subframes corresponding to the first sub-frame luminance value of the backlight luminance of the red light source compensation signal in the region M
  • a M_R2 represents the brightness value of the backlight brightness compensation signal of the red light source in the region M corresponding to the second subframe of the two subframes
  • R M_ave1 represents the average value of the driving voltage of the red sub-pixels in the region M of the first subframe.
  • R M_ave2 represents the average driving voltage of the red sub-pixels in the region M in the second subframe
  • R M_ave_H represents the average driving voltage of the red sub-pixels in the region M in the subframe corresponding to the high-voltage signal
  • R M_ave_L Represents the average value of the driving voltage of the red sub-pixels in the region M of the sub-frame corresponding to the low-voltage signal.
  • a M_G * G M_ave_H + A M_G * G M_ave_L A M_G1 * G M_ave1 + A M_G2 * G M_ave2 ;
  • a M_G1 * G M_ave1 A M_G2 * G M_ave2 ;
  • M is the number field 10
  • a M_G represents a luminance value of the green light source of the backlight reference luminance signal
  • a M_G1 represents a luminance value of the backlight brightness corresponding to the green light of the compensation signal region M of the two subframes in the first subframe
  • a M_G2 represents the brightness value of the backlight brightness compensation signal of the green light source corresponding to the second subframe in the two subframes in the region M
  • G M_ave1 represents the average driving voltage of the green sub-pixels in the region M of the first subframe.
  • G M_ave2 represents the average driving voltage of the green sub-pixels in the region M in the second subframe
  • G M_ave_H represents the average driving voltage of the green sub-pixels in the region M in the subframe corresponding to the high-voltage signal
  • G M_ave_L The average value of the driving voltages of the green sub-pixels in the region M in the subframe corresponding to the low-voltage signal.
  • a M_B * B M_ave_H + A M_B * B M_ave_L A M_B1 * B M_ave1 + A M_B2 * B M_ave2 ;
  • a M_B1 * B M_ave1 A M_B2 * B M_ave2 ;
  • M represents the serial number of area 10
  • a M_B represents the brightness value of the reference backlight brightness signal of the blue light source
  • a M_B1 represents the backlight brightness compensation signal of the blue light source corresponding to the first subframe of the two subframes in area M.
  • a M_B2 represents the brightness value of the backlight brightness compensation signal of the blue light source corresponding to the second subframe of the two subframes in the region M
  • B M_ave1 represents the driving of the blue sub-pixels of the first subframe in the region M the average of the voltage
  • B M_ave2 represents the average of pixels in the second driving voltage of the blue sub-frame in the sub-region M
  • B M_ave_H represents a high voltage signal corresponding to the M sub-frame in the region of the blue sub-pixel driving voltage
  • B M_ave_L represents the average value of the driving voltage of the blue sub-pixels in the region M of the subframe corresponding to the low-voltage signal.
  • the driving voltage of the sub-pixel matches the input signal (that is, the grayscale value of the corresponding color), so that the average value of the driving voltage can be used as an evaluation parameter of the viewing angle brightness of the sub-pixel of the color.
  • the backlight circuit since the backlight circuit includes a plurality of regions 10 that can independently control the brightness of the light, pixels of different blocks on the display panel are individually compensated for the brightness of the backlight. Therefore, the brightness of the lights of the regions 10 may be different from each other, but adjacent The difference in the brightness of the light output between regions may cause the naked eye to perceive the phenomenon of uneven brightness.
  • a step of adjusting the backlight brightness compensation signal of each area 10 is also included to alleviate the difference in the light output brightness of the adjacent area.
  • the adjustment is implemented by a spatial low-pass smoothing filtering process. After the spatial low-pass smoothing filtering process, the backlight brightness compensation values of each area 10 are not greatly different, which can avoid the phenomenon of uneven brightness and flicker due to the large difference in light brightness in adjacent areas.
  • the backlight brightness compensation value g (x, y) w1 * f (x -1, y-1) + w2 * f (x-1, y) + w3 * f (x-1, y + 1) + w4 * f (x, y-1) + w5 * f (x, y ) + w6 * f (x, y + 1) + w7 * f (x + 1, y-1) + w8 * f (x + 1, y) + w9 * f (x + 1, y + 1).
  • the present application also provides a display device including a display panel, a backlight circuit, and a driving circuit.
  • the display device may be a TN (Twisted Nematic), VA (Vertical Alignment), OCB (Optically Compensated Curved Alignment) type liquid crystal display, but is not limited thereto.
  • the backlight of the liquid crystal display can use direct or side backlight, and the backlight source is an RGB three-color light source.
  • the display device can also be a liquid crystal display with a curved screen.
  • the backlight circuit includes a backlight source and a zone control unit.
  • the backlight source is a RGB three-color backlight source.
  • the partition control unit is used to divide the backlight source into multiple areas. Each area includes three light sources: red light source, green light source, and blue light source. Each light source in each area is independently controlled. Output brightness.
  • the pixels in the display panel are divided into blocks corresponding to the areas of the backlight circuit on a one-to-one basis.
  • the driving circuit is used to execute the driving method of the above display device. The method can be implemented in cooperation with software stored in the memory of the driving circuit, that is, through the cooperation of software and hardware, and can also be implemented using pure hardware circuits known in the art.
  • the driving circuit includes an input circuit 22, a frame display circuit 24, a backlight compensation determination circuit 26, and a backlight brightness adjustment circuit 28.
  • the input circuit 22 is configured to obtain an input signal of each frame image to be displayed, and obtain a high voltage signal and a low voltage signal of a driving voltage of each sub-pixel of the display device.
  • the frame display circuit 24 is used to display each frame of image through two sub-frames before and after according to the high-voltage signal and the low-voltage signal, and the driving voltage of each sub-frame to two adjacent sub-pixels in each block is one high and one low The driving voltage of each sub-pixel in two sub-frames is one high and one low.
  • the backlight compensation determining circuit 26 is configured to count the driving voltage average value P M_ave1 of all target color sub-pixels in each region 10 in the first sub-frame (P represents the target color sub-pixel, and M represents the serial number of the area 10 in the backlight circuit 100 ), the average value of the driving voltage in the second sub-frame P M_ave2, the average value of the driving voltage of the high voltage signal P M_ave_H frame image and the average value of the driving voltage of the low voltage signal P M_ave_L, according to P M_ave1, P M_ave2, P M_ave_H, P M_ave_L reference backlight brightness, and calculates the backlight luminance signal a M_P compensation signal a M_P1 first subframe and the backlight brightness compensation signals a M_P2 second subframe.
  • Constraints of the calculation is: The A M_P1, after the brightness A M_P2 adjustment region M, region M luminance of two sub-frames convergence; and region M of two subframes luminance and the obtained according to A M_P and P M_ave_H
  • the sum of the brightness of the sub-frame (ie, the first frame described in step S110) and the brightness of the sub-frame (ie, the second frame described in step S110) obtained according to A M_P and PM_ave_L tend to be consistent.
  • the target color sub-pixels are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel, that is, the red sub-pixel, the green sub-pixel, and the blue sub-pixel need to be obtained for the above parameters. Specifically, it is calculated according to the following formula:
  • a M_R * R M_ave_H + A M_R * R M_ave_L A M_R1 * R M_ave1 + A M_R2 * R M_ave2 ;
  • a M_R1 * R M_ave1 A M_R2 * R M_ave2 ;
  • M is the number field 10
  • a M_R represents a luminance value of the red light source reference backlight luminance signal
  • a M_R1 represents two subframes corresponding to the first sub-frame luminance value of the backlight luminance of the red light source compensation signal in the region M
  • a M_R2 represents the brightness value of the backlight brightness compensation signal of the red light source in the region M corresponding to the second subframe of the two subframes
  • R M_ave1 represents the average value of the driving voltage of the red sub-pixels in the region M of the first subframe.
  • R M_ave2 represents the average driving voltage of the red sub-pixels in the region M in the second subframe
  • R M_ave_H represents the average driving voltage of the red sub-pixels in the region M in the subframe corresponding to the high-voltage signal
  • R M_ave_L Represents the average value of the driving voltage of the red sub-pixels in the region M of the sub-frame corresponding to the low-voltage signal.
  • a M_G * G M_ave_H + A M_G * G M_ave_L A M_G1 * G M_ave1 + A M_G2 * G M_ave2 ;
  • a M_G1 * G M_ave1 A M_G2 * G M_ave2 ;
  • M is the number field 10
  • a M_G represents a luminance value of the green light source of the backlight reference luminance signal
  • a M_G1 represents a luminance value of the backlight brightness corresponding to the green light of the compensation signal region M of the two subframes in the first subframe
  • a M_G2 represents the brightness value of the backlight brightness compensation signal of the green light source corresponding to the second subframe in the two subframes in the region M
  • G M_ave1 represents the average driving voltage of the green sub-pixels in the region M of the first subframe.
  • G M_ave2 represents the average driving voltage of the green sub-pixels in the region M in the second subframe
  • G M_ave_H represents the average driving voltage of the green sub-pixels in the region M in the subframe corresponding to the high-voltage signal
  • G M_ave_L The average value of the driving voltages of the green sub-pixels in the region M in the subframe corresponding to the low-voltage signal.
  • a M_B * B M_ave_H + A M_B * B M_ave_L A M_B1 * B M_ave1 + A M_B2 * B M_ave2 ;
  • a M_B1 * B M_ave1 A M_B2 * B M_ave2 ;
  • M represents the serial number of area 10
  • a M_B represents the brightness value of the reference backlight brightness signal of the blue light source
  • a M_B1 represents the backlight brightness compensation signal of the blue light source corresponding to the first subframe of the two subframes in area M.
  • a M_B2 represents the brightness value of the backlight brightness compensation signal of the blue light source corresponding to the second subframe of the two subframes in the region M
  • B M_ave1 represents the driving of the blue sub-pixels of the first subframe in the region M the average of the voltage
  • B M_ave2 represents the average of pixels in the second driving voltage of the blue sub-frame in the sub-region M
  • B M_ave_H represents a high voltage signal corresponding to the M sub-frame in the region of the blue sub-pixel driving voltage
  • B M_ave_L represents the average value of the driving voltage of the blue sub-pixels in the region M of the subframe corresponding to the low-voltage signal.
  • the backlight brightness adjustment circuit 28 is used to adjust the light output brightness of each area according to the backlight brightness compensation signal.
  • the present application also provides a display device including a display panel, a backlight circuit, and a driving chip.
  • the display device may be a TN, VA, OCB or other type of liquid crystal display, but is not limited thereto.
  • the backlight of the liquid crystal display can use direct or side backlight, and the backlight source is an RGB three-color light source.
  • the display device can also be a liquid crystal display with a curved screen.
  • the backlight circuit includes a backlight source and a zone control unit.
  • the backlight source is a RGB three-color backlight source.
  • the partition control unit is used to divide the backlight source into multiple areas. Each area includes three light sources: red light source, green light source, and blue light source. Each light source in each area is independently controlled. Output brightness.
  • the pixels in the display panel are divided into blocks corresponding to the areas of the backlight circuit on a one-to-one basis.
  • the driving chip is used to execute the driving method of the display device, and the method can be implemented by cooperating with software stored in a memory of the driving chip, that is, by cooperating with software and hardware.

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Abstract

一种显示装置，其驱动电路用于：将每帧图像通过两个子帧进行显示；根据所有颜色子像素的平均驱动电压，确定分别对应两个子帧的背光补偿信号大小，以调整光源的出光亮度。

Description

显示装置及其驱动方法 技术领域
本申请涉及显示领域，特别是涉及一种显示装置及其驱动方法。
背景技术
示例性地，大尺寸显示装置多采用负型垂直排列(Vertical Alignment,VA)液晶或者(In-Plane Switching,IPS)平面转换液晶技术。VA型液晶驱动在大视角下亮度随驱动电压快速饱和，从而导致视角色偏较为严重，进而影响画质品质。
一种改善的方案是将每帧图像通过前后两个子帧进行显示(例如60Hz的图像通过一前一后两个120Hz的子帧进行显示)，且一个子帧的像素驱动电压为高电压，另一个子帧的像素驱动电压为低电压(高、低仅表示两个子帧的像素驱动电压的相对差异)。
然而，这种方案在高、低电压相差较大时，人眼能够较明显地感觉到两个子帧的亮度差异导致的闪烁。
申请内容
根据本申请的各实施例，提供一种显示装置及其驱动方法。
一种显示装置的驱动方法，包括：将显示装置的红绿蓝三色背光源划分为多个区域，显示装置的像素被划分为与背光源的区域一一对应的区块；通过分区控制单元独立控制每个区域的每种颜色光源的出光亮度；获取需要显示的每帧图像的输入信号，及所述显示装置各子像素的驱动电压的高电压信号和低电压信号；根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小，所述平均驱动电压越高则背光亮度补偿信号越小、所述平均驱动电压越低则背光亮度补偿信号越大，以缓解每个所述区域在所述两个子帧中的亮度差异；以及根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
一种显示装置，包括：显示面板；背光电路，包括背光源和分区控制单元，所述背光源是红绿蓝三色背光源，所述分区控制单元用于将所述背光源划分为多个区域，每个所述区域均包括红光源、绿光源及蓝光源三种光源，所述分区控制单元还用于独立控制每个区域每种光源的出光亮度，所述显示面板中的像素被划分为与背光电路的区域一一对应的区块；及驱动电路，包括：输入电路，用于获取需要显示的每帧图像的输入信号，并获取所述显示装置各子像素的驱动电压的高电压信号和低电压信号；分帧显示电路，用于根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；背光补偿确定电路，用于根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小，所述平均驱动电压越高则背光亮度补偿信号越小、所述平均驱动电压越低则背光亮度补偿信号越大，以缓解每个所述区域在所述两个子帧中的亮度差异；及背光亮度调整电路，用于根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
一种显示装置，所述显示装置为液晶显示器，包括：
显示面板；
背光电路，包括背光源和分区控制单元，所述背光源是红绿蓝三色背光源，所述分区控制单元用于将所述背光源划分为多个区域，每个所述区域均包括红光源、绿光源及蓝光源三种光源，所述分区控制单元还用于独立控制每个区域的出光亮度，所述显示面板中的像素被划分为与背光电路的区域一一对应的区块；及
驱动电路，包括：
输入电路，用于获取需要显示的每帧图像的输入信号，并获取所述显示装置各子像素的驱动电压的高电压信号和低电压信号；
分帧显示电路，用于根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；
基准背光亮度电路，用于获取所述每帧图像对应的基准背光亮度信号；
背光补偿确定电路，用于统计每个所述区域的所有目标颜色子像素 在一个子帧中的驱动电压平均值、在另一个子帧中的驱动电压平均值、高电压信号的驱动电压平均值以及低电压信号的驱动电压平均值，并根据如下公式计算每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小：
对于红色子像素：
A M_R＊R M_ave_H+A M_R＊R M_ave_L＝A M_R1＊R M_ave1+A M_R2＊R M_ave2；
A M_R1＊R M_ave1＝A M_R2＊R M_ave2；
其中，M表示所述区域的序号，A M_R表示红色光源的所述基准背光亮度信号的亮度值，A M_R1表示对应两个子帧中的第一子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，A M_R2表示对应两个子帧中的第二子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，R M_ave1表示第一子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave2表示第二子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_H表示所述高电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_L表示所述低电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值；
对于绿色子像素：
A M_G＊G M_ave_H+A M_G＊G M_ave_L＝A M_G1＊G M_ave1+A M_G2＊G M_ave2；
A M_G1＊G M_ave1＝A M_G2＊G M_ave2；
其中，M表示所述区域的序号，A M_G表示绿色光源的所述基准背光亮度信号的亮度值，A M_G1表示对应两个子帧中的第一子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，A M_G2表示对应两个子帧中的第二子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，G M_ave1表示第一子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave2表示第二子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_H表示所述高电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_L表示所述低电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值；
对于蓝色子像素：
A M_B＊B M_ave_H+A M_B＊B M_ave_L＝A M_B1＊B M_ave1+A M_B2＊B M_ave2；
A M_B1＊B M_ave1＝A M_B2＊B M_ave2；
其中，M表示所述区域的序号，A M_B表示蓝色光源的所述基准背光亮度信号的亮度值，A M_B1表示对应两个子帧中的第一子帧在区域M的蓝色光源的所述背光亮度补偿信号的亮度值，A M_B2表示对应两个子帧中的第二子帧在 区域M的蓝色光源的所述背光亮度补偿信号的亮度值，B M_ave1表示第一子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave2表示第二子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_H表示所述高电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_L表示所述低电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值；及
背光亮度调整电路，用于根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
上述显示装置及其驱动方法，将每帧图像通过前后两个子帧进行显示，每一帧图像均采用高低相间的电压信号进行驱动，且第一帧图像和第二帧图像的高低驱动电压反转，并根据每个区域内目标颜色子像素的平均驱动电压生成下一幅画面的背光亮度调节信号，以缓解两个子帧中同一像素的亮度差异，从而减少两个子帧的驱动电压涨落造成的闪烁现象。分区控制单元将背光电路划分为多个可独立控制出光亮度的区域，相应地可以对显示面板上不同区块的像素进行单独的背光亮度补偿，比起采用统一背光亮度的背光电路，具有更好的防闪烁效果。并且，采用上述显示装置的驱动方法，液晶显示器的像素不需要再分为主要和次要子像素，从而可以大大降低显示面板的工艺复杂度，且大大提升了液晶显示面板的穿透率和解析度，减少了背光设计的成本。
附图说明
图1为一实施例中的显示装置的驱动方法的流程图；
图2是一实施例中适用于显示装置的驱动方法的液晶显示器的背光电路的示意图；
图3为图2中的显示装置进行驱动的示意图；
图4为图3的局部放大图；
图5为图3的另一局部放大图；
图6是一实施例中对背光亮度补偿值进行空间低通平滑滤波处理的示意图；
图7是一实施例中驱动电路的结构框图。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。 附图中给出了本申请的首选实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请的公开内容更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“竖直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的。
本申请的显示装置的驱动方法适用的显示装置可以为TN(扭曲向列)、VA(垂直配向)、OCB(光学补偿弯曲排列)等类型的液晶显示器，但并不限于此。该液晶显示器的背光可以运用直下或侧边背光，背光源为RGB(红绿蓝)三色背光源。该驱动方法同样适用于液晶显示器为曲面屏的情形。
图2是一实施例中显示装置的背光电路的示意图，该背光电路100包括背光源和分区控制单元，背光源的光线在分区控制单元的控制下使得背光电路100呈现出多个呈矩阵式排列的区域10(在本实施例中为9*8＝72个)，每个区域10由分区控制单元独立控制每种颜色光源的出光亮度，出射的光线通过液晶显示器的显示面板后进入人眼。我们根据每个区域10的出射光线将会照射至显示面板上的哪些像素，将显示面板划分为一个个区块，每个区块与背光电路的区域10一一对应。例如在图2所示实施例中，就是将显示面板划分为72个区块。
图1是一实施例中的显示装置的驱动方法的流程图，包括下列步骤：
S110，获取需要显示的每帧图像的输入信号及各子像素的驱动电压的高电压信号和低电压信号。
液晶显示器从外界的设备——例如图形处理器(GPU)——获取需要显示的每帧图像的输入信号。液晶显示器还会根据该输入信号得到一个基准背光亮度(用于控制背光源的出光亮度，可以用一个基准背光亮度信号来表示)，该亮度为不进行背光补偿时的背光源的背光亮度。如背景技术所述，一种示例性的技术是将每帧图像通过前后两个子帧进行显示，也即将一帧图像在时序上分割为两帧图像，分别记为第一帧和第二帧，通过第一帧和第二帧相互补偿向用户显示出与输入信号对应的图像。第一帧上的每一个像素的驱动电压均大于第二帧上对应子像素的驱动电压。也即，第一帧采用高驱动电压进行驱动，而第二帧采用低于第一帧的低驱动电压进行驱动。第一帧和第二帧 的每一子像素的驱动电压可以利用查找表(LUT，Look UP Table)查找获取。具体地，液晶显示器内会预先将查找表存储在帧缓存(frame buffer)里面。查找表为输入信号的电压和与该输入信号对应的第一帧、第二帧的每一子像素的驱动电压的对应关系表。以8bit的驱动电压信号为例，每一R/G/B输入信号的颜色灰度值0～255对应有256对高低电压信号，共有3*256对高电压信号R TH/G TH/B TH与低电压信号R TL/G TL/B TL。因此，根据输入信号中每一子像素的颜色灰度值可以查找对应驱动电压的高电压信号和低电压信号。
S120，根据高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示。
本实施例中显示装置的驱动方法虽然也是将每帧图像通过前后两个子帧进行显示，但并不是采用步骤S110所述的驱动电压一高一低的两帧的方式进行显示。本实施例中，每一帧图像同样分割为两帧图像，分别记为第一子帧和第二子帧，每一子帧上每个区块内的相邻两个子像素的驱动电压为一高一低，且每个子像素在两个子帧中的驱动电压为一高一低。也即，第一子帧的各子像素的驱动电压反转形成第二子帧的各子像素的驱动电压。同步骤S110一样，第一子帧和第二子帧中的每一子像素的驱动电压可以利用查找表(LUT，Look UP Table)查找获取。因此，根据输入信号中每一子像素的颜色灰度值可以查找对应驱动电压的高电压信号和低电压信号，从而用该高电压信号驱动第一子帧中对应的子像素、用该低电压信号驱动第二子帧中对应的子像素，或者用该低电压信号驱动第二子帧中对应的子像素、用该高电压信号驱动第二子帧中对应的子像素。相邻两个子像素采用高低驱动电压相间的驱动方式进行驱动，如图3所示，图3中对显示面板上的像素进行了放大。其中，图4为图3中第一子帧的局部放大图，图5为图3中第二子帧的局部放大图。在图3所示实施例中，每个区块内的任意两个相邻子像素的驱动电压为一高一低。
S130，根据每个区域内每种颜色子像素的平均驱动电压，确定两个子帧的背光亮度补偿信号的大小。
每个区域10的每种颜色背光源的两个背光亮度补偿信号各用于对一个子帧进行背光亮度调节，以降低画面的视角色偏。对于包括RGB三种颜色的像素，分别求出每个子帧中红色、绿色、蓝色子像素在一个区域10内的平均驱动电压。每个子帧在一个区域10内每种颜色子像素的平均驱动电压越高，则该子帧的背光亮度补偿信号越小，以缓解每个区域10在两个子帧中的亮度 差异。
S140，根据背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
上述显示装置的驱动方法，将每帧图像通过前后两个子帧进行显示，每一帧图像均采用高低相间的电压信号进行驱动，且第一帧图像和第二帧图像的高低驱动电压反转，并根据每个区域内每种颜色子像素的平均驱动电压生成下一幅画面的背光亮度调节信号，以缓解两个子帧中同一像素的亮度差异，从而减少两个子帧的驱动电压涨落造成的闪烁现象。分区控制单元将背光电路划分为多个可独立控制出光亮度的区域，相应地可以对显示面板上不同区块的像素进行单独的背光亮度补偿，比起采用统一背光亮度的背光电路，具有更好的防闪烁效果。并且，采用上述显示装置的驱动方法，液晶显示器的像素不需要再分为主要和次要子像素，从而可以大大降低显示面板的工艺复杂度，且大大提升了液晶显示面板的穿透率和解析度，减少了背光设计的成本。
在一个实施例中，步骤S140是对下一帧图像进行背光亮度补偿，即当前显示的帧图像的背光亮度是根据前一帧图像计算出来的。由于相邻两帧图像一般是基本相同的，因此当前帧根据前一帧图像进行背光亮度补偿也是合理的。
在一个实施例中，步骤S130通过以下方式实现：
统计每个区域10的所有目标颜色子像素在第一子帧中的驱动电压平均值P M_ave1(P表示目标颜色子像素，M表示区域10在背光电路100中的序号)、在第二子帧中的驱动电压平均值P M_ave2、该帧图像的高电压信号的驱动电压平均值P M_ave_H以及低电压信号的驱动电压平均值P M_ave_L，并根据P M_ave1、P M_ave2、P M_ave_H、P M_ave_L以及基准背光亮度信号A M_P计算第一子帧的背光亮度补偿信号A M_P1和第二子帧的背光亮度补偿信号A M_P2。该计算的约束条件是：根据A M_P1、A M_P2调整区域M的出光亮度后，区域M两个子帧的亮度趋于一致；且区域M两个子帧的亮度之和与根据A M_P和P M_ave_H得到的子帧(即步骤S110所述的第一帧)亮度、根据A M_P和P M_ave_L得到的子帧(即步骤S110所述的第二帧)亮度之和趋于一致。在本实施例中，目标颜色子像素分别为红色子像素、绿色子像素及蓝色子像素，即需要分别对红色子像素、绿色子像素及蓝色子像素进行上述参数的求取。具体地，是根据如下公式计算：
对于红色子像素：
A M_R＊R M_ave_H+A M_R＊R M_ave_L＝A M_R1＊R M_ave1+A M_R2＊R M_ave2；
A M_R1＊R M_ave1＝A M_R2＊R M_ave2；
其中，M表示区域10的序号，A M_R表示红色光源的基准背光亮度信号的亮度值，A M_R1表示对应两个子帧中的第一子帧在区域M的红色光源的背光亮度补偿信号的亮度值，A M_R2表示对应两个子帧中的第二子帧在区域M的红色光源的背光亮度补偿信号的亮度值，R M_ave1表示第一子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave2表示第二子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_H表示高电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_L表示低电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值。
对于绿色子像素：
A M_G＊G M_ave_H+A M_G＊G M_ave_L＝A M_G1＊G M_ave1+A M_G2＊G M_ave2；
A M_G1＊G M_ave1＝A M_G2＊G M_ave2；
其中，M表示区域10的序号，A M_G表示绿色光源的基准背光亮度信号的亮度值，A M_G1表示对应两个子帧中的第一子帧在区域M的绿色光源的背光亮度补偿信号的亮度值，A M_G2表示对应两个子帧中的第二子帧在区域M的绿色光源的背光亮度补偿信号的亮度值，G M_ave1表示第一子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave2表示第二子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_H表示高电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_L表示低电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值。
对于蓝色子像素：
A M_B＊B M_ave_H+A M_B＊B M_ave_L＝A M_B1＊B M_ave1+A M_B2＊B M_ave2；
A M_B1＊B M_ave1＝A M_B2＊B M_ave2；
其中，M表示区域10的序号，A M_B表示蓝色光源的基准背光亮度信号的亮度值，A M_B1表示对应两个子帧中的第一子帧在区域M的蓝色光源的背光亮度补偿信号的亮度值，A M_B2表示对应两个子帧中的第二子帧在区域M的蓝色光源的背光亮度补偿信号的亮度值，B M_ave1表示第一子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave2表示第二子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_H表示高电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_L表示低电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值。
在本实施例中，由于子像素的驱动电压与输入信号(也即对应颜色的灰阶值)匹配，从而使得驱动电压的平均值能作为该颜色子像素的视角亮度的评价参数。
可以理解的，由于背光电路包括多个可独立控制出光亮度的区域10，对显示面板上不同区块的像素进行单独的背光亮度补偿，因此区域10相互间的出光亮度会有差异，而相邻区域间的出光亮度差异使得肉眼可能会察觉到亮度不均匀的现象。为了解决或减轻此缺陷，在一实施例中，步骤S140之前还包括对各区域10的背光亮度补偿信号进行调整，以缓和相邻区域的出光亮度差异的步骤。进一步地，在一个实施例中，该调整是通过空间低通平滑滤波处理实现。经过空间低通平滑滤波处理后，各个区域10的背光亮度补偿值不至于差异甚大，能够避免相邻的区域因出光亮度差异大造成亮度不均与闪烁的现象。
空间低通平滑滤波处理等价于考量背光电路每个区域周围的其他区域的出光亮度，然后据此对该区域的背光亮度补偿值进行调整。可以理解的，由于一帧图像的两个子帧各对应一个背光亮度补偿信号，因此需要对这两个背光亮度补偿信号分别进行空间低通平滑滤波处理(两个信号处理的原理是一样的)。以图6所示9*7＝63个区域的背光电路200为例，对第一子帧对应的背光亮度补偿信号的空间低通平滑滤波处理进行说明：假设图中标示有f(x,y)的区域在步骤S130中计算出的背光亮度补偿值为f(x,y)，其中x、y分别表示横、纵坐标，由于每个区域包括RGB三色光源，f(x,y)与三色光源的背光亮度补偿信号A M_R1、A M_G1、A M_B1相关，进行空间低通平滑滤波处理时是对三种颜色分别进行处理(即以f(x,y)＝A M_R1，f(x,y)＝A M_G1，f(x,y)＝A M_B1分别进行计算)。由于与该区域相邻的区域一共有8个(已在图6中标出)，则该区域通过空间低通平滑滤波处理后得到的背光亮度补偿值g(x,y)＝w1*f(x-1,y-1)+w2*f(x-1,y)+w3*f(x-1,y+1)+w4*f(x,y-1)+w5*f(x,y)+w6*f(x,y+1)+w7*f(x+1,y-1)+w8*f(x+1,y)+w9*f(x+1,y+1)。其中w1～w9为各区域的权重，其具体取值可以由本领域技术人员通过实验和经验自行设计。一般地，w1+w2+…+w9＝1。可以理解的，对于位于背光电路200四个角的区域，相邻区域有3个；对于位于背光电路200边上的区域，相邻区域有5个。可以理解的，对于分别对应两个子帧的背光亮度补偿信号P M_ave1和P M_ave2，需要分别进行空间低通平滑滤波处理。
本申请还提供一种显示装置，包括显示面板、背光电路及驱动电路。该 显示装置可以为TN(扭曲向列)、VA(垂直配向)、OCB(光学补偿弯曲排列)等类型的液晶显示器，但并不限于此。该液晶显示器的背光可以运用直下或侧边背光，背光源为RGB三色光源该显示装置还可以为曲面屏的液晶显示器。
在一个实施例中，背光电路包括背光源和分区控制单元。背光源是RGB三色背光源，分区控制单元用于将背光源划分为多个区域，每个区域均包括红光源、绿光源及蓝光源三种光源，并独立控制每个区域每种光源的出光亮度。显示面板中的像素被划分为与背光电路的区域一一对应的区块。驱动电路用于执行上述显示装置的驱动方法，该方法可以配合存储于驱动电路中的存储器的软件实现，即通过软硬件的配合工作实现，也可以采用本领域习知的纯硬件电路实现。
参见图7，在该实施例中，驱动电路包括输入电路22、分帧显示电路24、背光补偿确定电路26及背光亮度调整电路28。输入电路22用于获取需要显示的每帧图像的输入信号，并获取显示装置各子像素的驱动电压的高电压信号和低电压信号。分帧显示电路24用于根据高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低。背光补偿确定电路26用于统计每个区域10的所有目标颜色子像素在第一子帧中的驱动电压平均值P M_ave1(P表示目标颜色子像素，M表示区域10在背光电路100中的序号)、在第二子帧中的驱动电压平均值P M_ave2、该帧图像的高电压信号的驱动电压平均值P M_ave_H以及低电压信号的驱动电压平均值P M_ave_L，并根据P M_ave1、P M_ave2、P M_ave_H、P M_ave_L以及基准背光亮度信号A M_P计算第一子帧的背光亮度补偿信号A M_P1和第二子帧的背光亮度补偿信号A M_P2。该计算的约束条件是：根据A M_P1、A M_P2调整区域M的出光亮度后，区域M两个子帧的亮度趋于一致；且区域M两个子帧的亮度之和与根据A M_P和P M_ave_H得到的子帧(即步骤S110所述的第一帧)亮度、根据A M_P和P M_ave_L得到的子帧(即步骤S110所述的第二帧)亮度之和趋于一致。在本实施例中，目标颜色子像素分别为红色子像素、绿色子像素及蓝色子像素，即需要分别对红色子像素、绿色子像素及蓝色子像素进行上述参数的求取。具体地，是根据如下公式计算：
对于红色子像素：
A M_R＊R M_ave_H+A M_R＊R M_ave_L＝A M_R1＊R M_ave1+A M_R2＊R M_ave2；
A M_R1＊R M_ave1＝A M_R2＊R M_ave2；
其中，M表示区域10的序号，A M_R表示红色光源的基准背光亮度信号的亮度值，A M_R1表示对应两个子帧中的第一子帧在区域M的红色光源的背光亮度补偿信号的亮度值，A M_R2表示对应两个子帧中的第二子帧在区域M的红色光源的背光亮度补偿信号的亮度值，R M_ave1表示第一子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave2表示第二子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_H表示高电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_L表示低电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值。
对于绿色子像素：
A M_G＊G M_ave_H+A M_G＊G M_ave_L＝A M_G1＊G M_ave1+A M_G2＊G M_ave2；
A M_G1＊G M_ave1＝A M_G2＊G M_ave2；
其中，M表示区域10的序号，A M_G表示绿色光源的基准背光亮度信号的亮度值，A M_G1表示对应两个子帧中的第一子帧在区域M的绿色光源的背光亮度补偿信号的亮度值，A M_G2表示对应两个子帧中的第二子帧在区域M的绿色光源的背光亮度补偿信号的亮度值，G M_ave1表示第一子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave2表示第二子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_H表示高电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_L表示低电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值。
对于蓝色子像素：
A M_B＊B M_ave_H+A M_B＊B M_ave_L＝A M_B1＊B M_ave1+A M_B2＊B M_ave2；
A M_B1＊B M_ave1＝A M_B2＊B M_ave2；
其中，M表示区域10的序号，A M_B表示蓝色光源的基准背光亮度信号的亮度值，A M_B1表示对应两个子帧中的第一子帧在区域M的蓝色光源的背光亮度补偿信号的亮度值，A M_B2表示对应两个子帧中的第二子帧在区域M的蓝色光源的背光亮度补偿信号的亮度值，B M_ave1表示第一子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave2表示第二子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_H表示高电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_L表示低电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值。背光亮度调整电路28用于根据背光亮度补偿信号调整每个区域的出光亮度。
本申请还提供一种显示装置，包括显示面板、背光电路及驱动芯片。该显示装置可以为TN、VA、OCB等类型的液晶显示器，但并不限于此。该液晶显示器的背光可以运用直下或侧边背光，背光源为RGB三色光源该显示装置还可以为曲面屏的液晶显示器。
在一个实施例中，背光电路包括背光源和分区控制单元。背光源是RGB三色背光源，分区控制单元用于将背光源划分为多个区域，每个区域均包括红光源、绿光源及蓝光源三种光源，并独立控制每个区域每种光源的出光亮度。显示面板中的像素被划分为与背光电路的区域一一对应的区块。驱动芯片用于执行上述显示装置的驱动方法，该方法可以配合存储于驱动芯片中的存储器的软件实现，即通过软硬件的配合工作实现。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种显示装置的驱动方法，包括：
    将显示装置的红绿蓝三色背光源划分为多个区域，显示装置的像素被划分为与背光源的区域一一对应的区块；
    通过分区控制设备独立控制每个区域的每种颜色光源的出光亮度；
    获取需要显示的每帧图像的输入信号，及所述显示装置各子像素的驱动电压的高电压信号和低电压信号；
    根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；
    根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小，所述平均驱动电压越高则背光亮度补偿信号越小、所述平均驱动电压越低则背光亮度补偿信号越大，以缓解每个所述区域在所述两个子帧中的亮度差异；以及
    根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
  2. 根据权利要求1所述的方法，其中，所述方法还包括获取所述每帧图像对应的每种颜色光源的基准背光亮度信号的步骤。
  3. 根据权利要求2所述的方法，其中，所述根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小的步骤包括：
    统计每个所述区域的每种颜色子像素在一个子帧中的驱动电压平均值、在另一个子帧中的驱动电压平均值、高电压信号的驱动电压平均值以及低电压信号的驱动电压平均值，并据此以及所述基准背光亮度信号计算所述背光亮度补偿信号；该计算的约束条件是：根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度后，每个区域所述两个子帧的亮度趋于一致；且每个区域所述两个子帧的亮度之和与根据所述基准背光亮度信号和所述高电压信号得到的子帧亮度、根据所述基准背光亮度信号和所述低电压信号得到的子帧亮度之和趋于一致。
  4. 根据权利要求3所述的方法，其中，所述计算是根据如下公式：
    对于红色子像素：
    A M_R＊R M_ave_H+A M_R＊R M_ave_L＝A M_R1＊R M_ave1+A M_R2＊R M_ave2；
    A M_R1＊R M_ave1＝A M_R2＊R M_ave2；
    其中，M表示所述区域的序号，A M_R表示红色光源的所述基准背光亮度信号的亮度值，A M_R1表示对应两个子帧中的第一子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，A M_R2表示对应两个子帧中的第二子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，R M_ave1表示第一子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave2表示第二子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_H表示所述高电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_L表示所述低电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值；
    对于绿色子像素：
    A M_G＊G M_ave_H+A M_G＊G M_ave_L＝A M_G1＊G M_ave1+A M_G2＊G M_ave2；
    A M_G1＊G M_ave1＝A M_G2＊G M_ave2；
    其中，M表示所述区域的序号，A M_G表示绿色光源的所述基准背光亮度信号的亮度值，A M_G1表示对应两个子帧中的第一子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，A M_G2表示对应两个子帧中的第二子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，G M_ave1表示第一子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave2表示第二子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_H表示所述高电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_L表示所述低电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值；
    对于蓝色子像素：
    A M_B＊B M_ave_H+A M_B＊B M_ave_L＝A M_B1＊B M_ave1+A M_B2＊B M_ave2；
    A M_B1＊B M_ave1＝A M_B2＊B M_ave2；
    其中，M表示所述区域的序号，A M_B表示蓝色光源的所述基准背光亮度信号的亮度值，A M_B1表示对应两个子帧中的第一子帧在区域M的蓝色光源的所述背光亮度补偿信号的亮度值，A M_B2表示对应两个子帧中的第二子帧在区域M的蓝色光源的所述背光亮度补偿信号的亮度值，B M_ave1表示第一子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave2表示第二子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_H表示所述高电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_L表示所述低电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值。
  5. 根据权利要求1所述的方法，其中，所述根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度的步骤，是对下一帧图像进行背光 亮度补偿。
  6. 根据权利要求1所述的方法，其中，所述根据所述背光亮度补偿信号调整每个区域的出光亮度的步骤之前，还包括对各区域的背光亮度补偿信号进行调整，以缓和相邻区域的出光亮度差异的步骤。
  7. 根据权利要求6所述的方法，其中，所述对各区域的背光亮度补偿信号进行调整的步骤，是通过空间低通平滑滤波处理实现。
  8. 一种显示装置，包括：
    显示面板；
    背光电路，包括背光源和分区控制设备，所述背光源是红绿蓝三色背光源，所述分区控制设备设置为将所述背光源划分为多个区域，每个所述区域均包括红光源、绿光源及蓝光源三种光源，所述分区控制设备还设置为独立控制每个区域每种光源的出光亮度，所述显示面板中的像素被划分为与背光电路的区域一一对应的区块；及
    驱动电路，包括：
    输入电路，设置为获取需要显示的每帧图像的输入信号，并获取所述显示装置各子像素的驱动电压的高电压信号和低电压信号；
    分帧显示电路，设置为根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；
    背光补偿确定电路，设置为根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小，所述平均驱动电压越高则背光亮度补偿信号越小、所述平均驱动电压越低则背光亮度补偿信号越大，以缓解每个所述区域在所述两个子帧中的亮度差异；及
    背光亮度调整电路，设置为根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
  9. 根据权利要求8所述的显示装置，其中，所述驱动电路还包括设置为获取所述每帧图像对应的每种颜色光源的基准背光亮度信号的基准背光亮度电路。
  10. 根据权利要求9所述的显示装置，其中，所述背光补偿确定电路包括：
    第一子帧统计电路，设置为统计每个所述区域的每种颜色子像素在所述 两个子帧中的第一子帧中的驱动电压平均值；
    第二子帧统计电路，设置为统计每个所述区域的每种颜色子像素在所述两个子帧中的第二子帧中的驱动电压平均值；
    高电压统计电路，设置为统计每个所述区域的每种颜色子像素的高电压信号的驱动电压平均值；
    低电压统计电路，设置为统计每个所述区域的每种颜色子像素的低电压信号的驱动电压平均值；及
    计算电路，设置为根据所述第一子帧统计电路、第二子帧统计电路、高电压统计电路、低电压统计电路统计出的值及所述基准背光亮度信号计算所述背光亮度补偿信号，且计算的约束条件是：根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度后，每个区域所述两个子帧的亮度趋于一致，且每个区域所述两个子帧的亮度之和与根据所述基准背光亮度信号和所述高电压信号得到的子帧、根据所述基准背光亮度信号和所述低电压信号得到的子帧的亮度之和趋于一致。
  11. 根据权利要求8所述的显示装置，其中，所述驱动电路还包括：
    空间低通平滑滤波器，设置为对各所述区域的背光亮度补偿信号进行调整，以缓和相邻区域的出光亮度。
  12. 根据权利要求11所述的显示装置，其中，所述背光亮度调整电路是根据所述空间低通平滑滤波器调整后的背光亮度补偿信号调整每个区域的出光亮度。
  13. 根据权利要求8所述的显示装置，其中，所述背光亮度调整电路根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度，是对下一帧图像进行背光亮度补偿。
  14. 一种显示装置，包括：
    显示面板；
    背光电路，包括背光源和分区控制设备，所述背光源是红绿蓝三色背光源，所述分区控制设备设置为将所述背光源划分为多个区域，每个所述区域均包括红光源、绿光源及蓝光源三种光源，所述分区控制设备还设置为独立控制每个区域每种光源的出光亮度，所述显示面板中的像素被划分为与背光电路的区域一一对应的区块；及
    驱动芯片，存储有指令，所述指令被所述驱动芯片执行时实现以下步骤：
    获取需要显示的每帧图像的输入信号，并获取所述显示装置各子像素的 驱动电压的高电压信号和低电压信号；
    根据所述高电压信号和低电压信号将每帧图像通过前后两个子帧进行显示，且每个子帧对每个所述区块内相邻两个子像素的驱动电压为一高一低，每个子像素在两个子帧中的驱动电压为一高一低；
    根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小，所述平均驱动电压越高则背光亮度补偿信号越小、所述平均驱动电压越低则背光亮度补偿信号越大，以缓解每个所述区域在所述两个子帧中的亮度差异；
    根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度。
  15. 根据权利要求14所述的显示装置，其中，所述指令被所述驱动芯片执行时还实现步骤：获取所述每帧图像对应的每种颜色光源的基准背光亮度信号。
  16. 根据权利要求15所述的显示装置，其中，所述根据每个所述区域内每种颜色子像素的平均驱动电压，确定每个所述区域的每种颜色光源分别对应两个子帧的背光亮度补偿信号的大小的步骤包括：
    统计每个所述区域的每种颜色子像素在一个子帧中的驱动电压平均值、在另一个子帧中的驱动电压平均值、高电压信号的驱动电压平均值以及低电压信号的驱动电压平均值，并据此以及所述基准背光亮度信号计算所述背光亮度补偿信号；该计算的约束条件是：根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度后，每个区域所述两个子帧的亮度趋于一致；且每个区域所述两个子帧的亮度之和与根据所述基准背光亮度信号和所述高电压信号得到的子帧亮度、根据所述基准背光亮度信号和所述低电压信号得到的子帧亮度之和趋于一致。
  17. 根据权利要求16所述的显示装置，其中，所述计算是根据如下公式：
    对于红色子像素：
    A M_R＊R M_ave_H+A M_R＊R M_ave_L＝A M_R1＊R M_ave1+A M_R2＊R M_ave2；
    A M_R1＊R M_ave1＝A M_R2＊R M_ave2；
    其中，M表示所述区域的序号，A M_R表示红色光源的所述基准背光亮度信号的亮度值，A M_R1表示对应两个子帧中的第一子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，A M_R2表示对应两个子帧中的第二子帧在区域M的红色光源的所述背光亮度补偿信号的亮度值，R M_ave1表示第一子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave2表示第二子帧在区域 M内的红色子像素的驱动电压的平均值，R M_ave_H表示所述高电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值，R M_ave_L表示所述低电压信号对应的子帧在区域M内的红色子像素的驱动电压的平均值；
    对于绿色子像素：
    A M_G＊G M_ave_H+A M_G＊G M_ave_L＝A M_G1＊G M_ave1+A M_G2＊G M_ave2；
    A M_G1＊G M_ave1＝A M_G2＊G M_ave2；
    其中，M表示所述区域的序号，A M_G表示绿色光源的所述基准背光亮度信号的亮度值，A M_G1表示对应两个子帧中的第一子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，A M_G2表示对应两个子帧中的第二子帧在区域M的绿色光源的所述背光亮度补偿信号的亮度值，G M_ave1表示第一子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave2表示第二子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_H表示所述高电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值，G M_ave_L表示所述低电压信号对应的子帧在区域M内的绿色子像素的驱动电压的平均值；
    对于蓝色子像素：
    A M_B＊B M_ave_H+A M_B＊B M_ave_L＝A M_B1＊B M_ave1+A M_B2＊B M_ave2；
    A M_B1＊B M_ave1＝A M_B2＊B M_ave2；
    其中，M表示所述区域的序号，A M_B表示蓝色光源的所述基准背光亮度信号的亮度值，A M_B1表示对应两个子帧中的第一子帧在区域M的蓝色光源的所述背光亮度补偿信号的亮度值，A M_B2表示对应两个子帧中的第二子帧在区域M的蓝色光源的所述背光亮度补偿信号的亮度值，B M_ave1表示第一子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave2表示第二子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_H表示所述高电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值，B M_ave_L表示所述低电压信号对应的子帧在区域M内的蓝色子像素的驱动电压的平均值。
  18. 根据权利要求14所述的显示装置，其中，所述根据所述背光亮度补偿信号调整每个区域的每种颜色光源的出光亮度的步骤，是对下一帧图像进行背光亮度补偿。
  19. 根据权利要求14所述的显示装置，其中，所述根据所述背光亮度补偿信号调整每个区域的出光亮度的步骤之前，还包括对各区域的背光亮度补偿信号进行调整，以缓和相邻区域的出光亮度差异的步骤。
  20. 根据权利要求19所述的显示装置，其中，所述对各区域的背光亮度 补偿信号进行调整的步骤，是通过空间低通平滑滤波处理实现。
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