WO2022033110A1 - Dispositif d'affichage à cristaux liquides et procédé de compensation d'attaque ainsi qu'appareil de compensation d'attaque associés - Google Patents

Dispositif d'affichage à cristaux liquides et procédé de compensation d'attaque ainsi qu'appareil de compensation d'attaque associés Download PDF

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WO2022033110A1
WO2022033110A1 PCT/CN2021/095483 CN2021095483W WO2022033110A1 WO 2022033110 A1 WO2022033110 A1 WO 2022033110A1 CN 2021095483 W CN2021095483 W CN 2021095483W WO 2022033110 A1 WO2022033110 A1 WO 2022033110A1
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compensation
sub
data
image
pixel
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PCT/CN2021/095483
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English (en)
Chinese (zh)
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韩启强
赵博
洪星智
李永超
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合肥奕斯伟集成电路有限公司
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Publication of WO2022033110A1 publication Critical patent/WO2022033110A1/fr

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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
    • G09G3/36—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
    • G09G3/3611—Control of matrices with row and column drivers

Definitions

  • the present disclosure relates to the technical field of liquid crystal display driving, and in particular, to a liquid crystal display, a driving compensation method thereof, and a driving compensation device.
  • the display principle of the liquid crystal display is based on driving the inversion of the liquid crystal with different voltages to achieve different amounts of light transmission.
  • the time for the liquid crystal to flip from one state to another state is not instantaneous, that is, when the liquid crystal flips from the previous state to the current target state, even if the corresponding voltage has been applied, the liquid crystal After a period of time, the optical response can reach the ideal target state, and this time is the response time. If the response time exceeds the time of one frame (for example, at 60Hz, the time of one frame is 16.6ms), the picture will be blurred.
  • the purpose of the present disclosure is to provide a liquid crystal display, a driving compensation method and a driving compensation device, which are used to solve the problem that the response time of the liquid crystal in the liquid crystal display is long, which affects the display quality of the liquid crystal display.
  • a first aspect of the present disclosure provides a driving compensation method for a liquid crystal display, including:
  • a data signal for writing into each sub-pixel included in the liquid crystal display is generated based on the first image compensation data.
  • the step of acquiring image data corresponding to each frame of images to be displayed by the liquid crystal display specifically includes:
  • the response time compensation module receives the image data corresponding to the current frame image and the image data corresponding to the previous frame image obtained by decompression.
  • the image data corresponding to each frame image includes initial grayscale data corresponding to each sub-pixel one-to-one;
  • the step of determining the first image compensation data corresponding to the current frame image specifically includes:
  • the initial grayscale data of the current frame image corresponding to each subpixel and the initial grayscale data of the previous frame image corresponding to each subpixel obtain the current frame image corresponding to each subpixel from the pre-generated first compensation data table the first gray-scale compensation data, generating first image compensation data corresponding to the current frame image according to the first gray-scale compensation data corresponding to each sub-pixel;
  • the abscissa of the index value of the first compensation data table includes the initial grayscale data of the previous frame image corresponding to the sub-pixel, and the ordinate of the index value of the first compensation data table includes the current frame image corresponding to the sub-pixel.
  • Initial grayscale data the first compensation data table stores first grayscale compensation data corresponding to index values one-to-one.
  • the liquid crystal display includes grid lines and data lines arranged crosswise, and a plurality of sub-pixels distributed in an array, the plurality of sub-pixels include a plurality of columns of sub-pixels corresponding to the data lines one-to-one, and the sub-pixels in each column of Each sub-pixel is electrically connected to the corresponding data line;
  • the step of generating a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data includes:
  • the first gray-scale compensation data corresponding to all the adjacent two sub-pixels and from the pre-generated second compensation data table, obtain each adjacent two sub-pixels that are far away from the starting end of the data line
  • the first target subpixel corresponds to the second grayscale compensation data of the current frame image
  • the abscissa of the index value of the second compensation data table includes the first target subpixel that is not corresponding to the first target subpixel in the adjacent two subpixels.
  • Grayscale compensation data, the ordinate of the index value of the second compensation data table includes the first grayscale compensation data corresponding to the first target subpixel in the two adjacent subpixels, and the second compensation data table
  • the second grayscale compensation data corresponding to the index value one-to-one is stored in the ;
  • a data signal for writing into each of the first target sub-pixels is generated.
  • the plurality of sub-pixels include a plurality of rows of sub-pixels corresponding to the gate lines one-to-one, and each sub-pixel in each row of the sub-pixels is electrically connected to the corresponding gate line respectively;
  • the step of generating a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data specifically includes:
  • the compensation parameter corresponding to the second target sub-pixel is obtained from the pre-generated third compensation data table; the abscissa of the index value of the third compensation data table Including the abscissa of the second target sub-pixel, the ordinate of the index value of the third compensation data table includes the ordinate of the second target sub-pixel, and the third compensation data table is stored with the index. Compensation parameters corresponding to one-to-one value;
  • a data signal for writing into the second target subpixel is generated.
  • a second aspect of the present disclosure provides a driving compensation device for a liquid crystal display for implementing the above driving compensation method, the driving compensation device comprising: an acquisition module, a response time compensation module and a driving module ;
  • the acquiring module is used for: acquiring image data corresponding to each frame of images to be displayed by the liquid crystal display;
  • the response time compensation module is used to: determine the first image compensation data corresponding to the current frame image according to the image data of the current frame image to be displayed by the liquid crystal display and the image data of the previous frame image;
  • the driving module is configured to: generate a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data.
  • the obtaining module specifically includes: a receiving module, a compression module, a storage module and a decompression module;
  • the receiving module is used to sequentially receive image data corresponding to each frame of image, and transmit the image data corresponding to each frame of image to the compression module and the response time compensation module respectively;
  • the compression module is used to compress the image data corresponding to each frame of image and save it in the storage module;
  • the decompression module is configured to decompress the image data corresponding to the previous frame of image from the storage module, and transmit it to the response time compensation module.
  • the image data corresponding to each frame image includes initial grayscale data corresponding to each sub-pixel one-to-one;
  • the response time compensation module is specifically used for:
  • the initial grayscale data of the current frame image corresponding to each subpixel and the initial grayscale data of the previous frame image corresponding to each subpixel obtain the current frame image corresponding to each subpixel from the pre-generated first compensation data table the first gray-scale compensation data, generating first image compensation data corresponding to the current frame image according to the first gray-scale compensation data corresponding to each sub-pixel;
  • the abscissa of the index value of the first compensation data table includes the initial grayscale data of the previous frame image corresponding to the sub-pixel, and the ordinate of the index value of the first compensation data table includes the current frame image corresponding to the sub-pixel.
  • Initial grayscale data the first compensation data table stores first grayscale compensation data corresponding to index values one-to-one.
  • the liquid crystal display includes grid lines and data lines arranged crosswise, and a plurality of sub-pixels distributed in an array, the plurality of sub-pixels include a plurality of columns of sub-pixels corresponding to the data lines one-to-one, and the sub-pixels in each column of Each sub-pixel is electrically connected to the corresponding data line;
  • the drive compensation device further includes: an under-charge compensation module;
  • the under-charge compensation module is used for: acquiring the first gray-scale compensation data corresponding to all adjacent two sub-pixels in the same column of sub-pixels;
  • the first gray-scale compensation data corresponding to all the adjacent two sub-pixels and from the pre-generated second compensation data table, obtain each adjacent two sub-pixels that are far away from the starting end of the data line
  • the first target subpixel corresponds to the second grayscale compensation data of the current frame image
  • the abscissa of the index value of the second compensation data table includes the first target subpixel that is not corresponding to the first target subpixel in the adjacent two subpixels.
  • Grayscale compensation data, the ordinate of the index value of the second compensation data table includes the first grayscale compensation data corresponding to the first target subpixel in the two adjacent subpixels, and the second compensation data table
  • the second grayscale compensation data corresponding to the index value one-to-one is stored in the ;
  • the driving module is specifically configured to: generate a data signal for writing into each of the first target sub-pixels based on the second gray-scale compensation data corresponding to each of the first target sub-pixels.
  • the plurality of sub-pixels include a plurality of rows of sub-pixels corresponding to the gate lines one-to-one, and each sub-pixel in each row of the sub-pixels is electrically connected to the corresponding gate line respectively;
  • the under-charge compensation module is further configured to: acquire position data corresponding to the second target sub-pixel in the plurality of sub-pixels;
  • the compensation parameter corresponding to the second target sub-pixel is obtained from the pre-generated third compensation data table; the abscissa of the index value of the third compensation data table Including the abscissa of the second target sub-pixel, the ordinate of the index value of the third compensation data table includes the ordinate of the second target sub-pixel, and the third compensation data table is stored with the index. Compensation parameters corresponding to one-to-one value;
  • the driving module is specifically configured to: based on the first grayscale compensation data, the second grayscale compensation data and the compensation parameter corresponding to the second target subpixel, generate a data for writing to the second target subpixel data signal in .
  • a third aspect of the present disclosure provides a liquid crystal display including the above driving compensation device.
  • the present disclosure it is possible to determine, according to the image data of the image of the previous frame and the image data of the image of the current frame, the corresponding degree of inversion of the liquid crystal when the liquid crystal display is switched from the image of the previous frame to the image of the current frame;
  • the degree of inversion performs adaptive compensation on the image data corresponding to the current frame image; so that after the data signal generated based on the first image compensation data is written into each sub-pixel, the response speed of the liquid crystal can be effectively improved and the response time of the liquid crystal can be shortened. It avoids the phenomenon of blurring when the liquid crystal display screen is displayed.
  • FIG. 1 is a schematic structural diagram of a liquid crystal display according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a first layout of sub-pixels in a display panel according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a second layout of sub-pixels in a display panel according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a third layout of sub-pixels in a display panel according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a fourth layout of sub-pixels in a display panel according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of an image data curve and a liquid crystal response curve before compensation and after compensation provided by an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of modules in a drive compensation device provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of image data corresponding to a current frame image and a previous frame image provided by an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a first compensation data table provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of adjacent sub-pixels along an extension direction of a data line according to an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram of a second compensation data table provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of a row of sub-pixels corresponding to one gate driving module according to an embodiment of the present disclosure
  • FIG. 13 is a schematic diagram of a row of sub-pixels corresponding to two gate driving modules according to an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of a charging curve corresponding to the structures shown in FIGS. 12 and 13 according to an embodiment of the present disclosure
  • 15 is a schematic structural diagram of a third compensation data table
  • 16 is a schematic diagram of bilinear difference upsampling performed on the third compensation data table
  • FIG. 17 is a schematic diagram of triangular difference upsampling performed on the third compensation data table.
  • Embodiments of the present disclosure provide a driving compensation method for a liquid crystal display, including:
  • a data signal for writing into each sub-pixel included in the liquid crystal display is generated based on the first image compensation data.
  • FIG. 1 shows the structure diagram of the entire liquid crystal display.
  • the image data Video Stream
  • the timing control chip 1 T-CON
  • the timing control chip 1 passes through a certain amount of data.
  • Process generate the data required by the gate driver chip 2 (Gate Driver IC) or Gate On Array, and generate the data required by the source driver chip 3 (Source Driver IC), and transfer the processed image data to the Gate driver chip 2 (or Gate On Array, GOA for short) and source driver chip 3.
  • the gate driver chip 2 (or Gate On Array, GOA for short) can generate switching signals according to the received image data, and transmit them to the gate lines in the display panel 4.
  • the source driver chip 3 can generate a voltage signal (ie, a data signal) according to the received image data, and transmit it to the data lines in the display panel 4 .
  • the layout position of the gate driving chip 2 may be located at the positions indicated by marks 5 and 6 .
  • the gate driver chip 2 or GOA can be optionally set in the liquid crystal display panel.
  • the source driver chip 3 can be arranged on the upper side or the lower side of the display panel 4 as shown in FIG. 1 according to actual needs.
  • FIG. 2 shows a schematic layout of gate lines (eg, Gate1 to Gate6 ), data lines (Source1 to Source10 ), and sub-pixels (eg, mark 402 ) inside the display panel 4 .
  • the display panel 4 includes a plurality of sub-pixels distributed in an array. Exemplarily, the number of sub-pixels of a typical full high-definition (FHD) liquid crystal display is 1920*1080*3 or 1920*1080*4, and an ultra-high-definition (UHD) liquid crystal display The number of sub-pixels is 3840*2160*3 or 3840*2160*4.
  • FHD full high-definition
  • UHD ultra-high-definition
  • the liquid crystal display includes a plurality of gate driving chips 2, and each gate driving chip 2 corresponds to a part of the gate lines electrically connected, and is used to generate switching signals in a certain timing sequence and transmit them to the correspondingly connected gate lines, so as to control the corresponding gate lines of the gate lines.
  • the grid lines in the display panel 4 are scanned line by line, and the data lines write data signals into each row of sub-pixels line by line, and control the liquid crystal of each sub-pixel to deflect to a certain extent, so as to control the backlight to pass through the liquid crystal with a certain luminous flux, and pass through the liquid crystal with a certain luminous flux.
  • the display panel 4 After color filtering, the display panel 4 is emitted, so that the display panel 4 finally presents different color levels.
  • the layout of the sub-pixels in the display panel 4 and the connection relationship between the sub-pixels and the gate lines and the data lines are various.
  • the blue sub-pixel B; the specific arrangement of the red sub-pixel R, the green sub-pixel G and the blue sub-pixel B, and the connection relationship between each sub-pixel and the gate line and the data line include as shown in Fig. 3 and Fig. 4 and Figure 5 show the specific way.
  • the liquid crystal display When the liquid crystal display implements the display function, it will display multiple frames of images in sequence, and when the image data corresponding to each frame of images is different, the corresponding inversion states of the control liquid crystal are different.
  • Image data corresponding to each frame of images to be displayed by the liquid crystal display is sequentially acquired, and based on the image data corresponding to each frame of image, the inversion state of the liquid crystal when each frame of image is displayed can be determined.
  • the first inversion state of the liquid crystal when the liquid crystal display is displaying the previous frame image can be determined, and
  • the liquid crystal display displays the current frame image, the liquid crystal is in the second inversion state, and according to the first inversion state and the second inversion state, it can be determined when the liquid crystal display switches from the first frame image to the second frame image , the degree of inversion of the liquid crystal.
  • the image data corresponding to the current frame image is compensated to obtain the first image compensation data corresponding to the current frame image.
  • the abscissa represents time
  • the ordinate represents the drive level (Drive Level)
  • 1003 is the change curve of the original image data corresponding to the sub-pixel before compensation when the current frame image is displayed
  • 1001 is the current frame displayed by the liquid crystal display before compensation Image, the corresponding optical response curve of the liquid crystal.
  • 1004 is the change curve of the first image compensation data corresponding to the positive compensation when the sub-pixel after compensation displays the current frame image
  • 1005 is the compensation data of the first image corresponding to the negative compensation when the sub-pixel after compensation displays the current frame image
  • the change curve of 1002 is the optical response curve of the corresponding liquid crystal when the liquid crystal display displays the current frame image after compensation.
  • the driving compensation method provided by the embodiment of the present disclosure when used to perform driving compensation on the liquid crystal display, during the time from t1 to t2, the voltage value of the forwardly compensated data signal received by the sub-pixel is higher than that of the compensation The voltage value of the previous data signal, so that the optical response of the liquid crystal is accelerated (see 1002), and the liquid crystal display can reach the target brightness in a relatively short time.
  • the voltage value of the negatively compensated data signal received by the sub-pixel is lower than the voltage value of the data signal before compensation, thereby accelerating the optical response of the liquid crystal and entering the next inversion state faster. .
  • the liquid crystal display when the liquid crystal display is driven to display by the driving compensation method provided by the embodiment of the present disclosure, it can be determined according to the image data of the previous frame image and the image data of the current frame image when the liquid crystal display switches from the previous frame image to the current frame image , the degree of inversion corresponding to the liquid crystal; and adaptively compensate the image data corresponding to the current frame image according to the degree of inversion; so that after the data signal generated based on the first image compensation data is written into each sub-pixel, the liquid crystal can be effectively improved.
  • the response speed of the liquid crystal display is shortened, and the response time of the liquid crystal display is shortened, and the blurring phenomenon of the liquid crystal display when the screen is displayed is avoided.
  • the step of acquiring image data corresponding to each frame of images to be displayed by the liquid crystal display specifically includes:
  • the response time compensation module receives the image data corresponding to the current frame image and the image data corresponding to the previous frame image obtained by decompression.
  • the receiving module 101 sequentially receives image data corresponding to each frame of images sent from the front end.
  • the receiving module 101 transmits the image data corresponding to the first frame of image to the compression module 102, and the compression module 102 compresses the image data corresponding to the first frame of image and transmits it to the storage module 104 for storage.
  • the receiving module 101 transmits the image data corresponding to each frame of image to the compression module 102, and the compression module 102 compresses the image data corresponding to each frame of image. After compression, it is transmitted to the storage module 104 for storage; at the same time, the receiving module 101 transmits the image data corresponding to each frame of image to the response time compensation module 105 .
  • the decompression module 103 can decompress and obtain the image data corresponding to the previous frame image from the storage module 104, and decompress the previous frame image.
  • the image data corresponding to the image is transmitted to the response time compensation module 105 .
  • the response time compensation module 105 determines the first image compensation data corresponding to the current frame image according to the image data of the current frame image and the image data of the previous frame image to be displayed by the liquid crystal display.
  • the receiving module 101 , the compression module 102 , the decompression module 103 , the storage module 104 and the response time compensation module 105 may be part of the timing control chip 1 .
  • the response time compensation module 105 obtains the image data of the previous frame of image through the compression and decompression process, which effectively improves the acquisition speed of the image data of the previous frame of image, thereby effectively improving the liquid crystal display.
  • the drive compensation speed of the display is the same as the above embodiment.
  • the image data corresponding to each frame of image includes initial grayscale data corresponding to each sub-pixel one-to-one;
  • the step of determining the first image compensation data corresponding to the current frame image specifically includes:
  • the initial grayscale data of the current frame image corresponding to each subpixel and the initial grayscale data of the previous frame image corresponding to each subpixel obtain the current frame image corresponding to each subpixel from the pre-generated first compensation data table the first gray-scale compensation data, generating first image compensation data corresponding to the current frame image according to the first gray-scale compensation data corresponding to each sub-pixel;
  • the abscissa of the index value of the first compensation data table includes the initial grayscale data of the previous frame image corresponding to the sub-pixel, and the ordinate of the index value of the first compensation data table includes the current frame image corresponding to the sub-pixel.
  • Initial grayscale data the first compensation data table stores the first grayscale compensation data of the current frame image corresponding to the index values one-to-one.
  • 501 represents the image data of the previous frame image, that is, the image data decompressed by the decompression module 103
  • 502 represents the image data of the current frame image, that is, it is directly transmitted by the receiving module 101 to the response time compensation Image data for module 105.
  • FIG. 8 shows the same sub-pixel in the display panel, the corresponding initial grayscale data 601 of the previous frame image, and the corresponding initial grayscale data 602 of the current frame image.
  • the initial grayscale data 602 is compensated, correction and compensation are performed with reference to the initial grayscale data 601 of the previous frame image.
  • FIG. 9 illustrates an N*M first compensation data table.
  • the abscissa of the index value of the first compensation data table includes the initial grayscale data (eg, G1 ⁇ GN)
  • the ordinate of the index value of the first compensation data table includes the initial grayscale data (such as T1-TM) of the current frame image corresponding to the sub-pixel
  • the first compensation data table stores a value equal to the index value.
  • the first gray-scale compensation data L can be the final compensated data, that is, it is not necessary to perform other operations on the first gray-scale compensation data L, and the data signal can be obtained directly based on the first gray-scale compensation data L. .
  • the first grayscale compensation data L may be a difference value that needs to be compensated, that is, the difference value and the initial grayscale data of the current frame image need to be added to obtain final compensated data, and then based on the final compensation value data to get the data signal.
  • G3 in L(G3, T4) at this position 701 represents the initial grayscale data of the previous frame image corresponding to the sub-pixel, for example: G3 takes The value is 50; T4 represents the initial grayscale data of the current frame image corresponding to the sub-pixel, for example: T4 is 80; L represents the first grayscale compensation data of the current frame, for example: L is 90; in this case, L is the final compensated data.
  • the gray-scale data is added, that is, 10+80, and the final compensated data 90 is obtained.
  • the size of the first compensation data table is generally related to the bit depth (Bit-Depth) of the image data. For example, if the bit depth of the image data is 8-bit, the first compensation data table needs a size of 256*256.
  • the first compensation data table can be down-sampled and stored with a certain step size, and when the first compensation data table is to be used, the same step size can be used for further sampling and storage. Upsampling approximately restores the corresponding first grayscale compensation data.
  • the drive compensation method according to the initial grayscale data of the current frame image corresponding to each subpixel, and the initial grayscale data of the previous frame image corresponding to each subpixel, from the pre-generated first compensation data table.
  • the data signal is the data signal after compensation. After the data signal is written into each sub-pixel, it can effectively improve the response speed of the liquid crystal, shorten the response time of the liquid crystal, and avoid the display of the liquid crystal display. The screen appears blurry.
  • the driving circuit of each sub-pixel in the liquid crystal display includes a set of resistors and capacitors, that is, the driving circuit of the entire liquid crystal display is composed of a matrix of resistors and capacitors.
  • the scanning signal will generate a certain delay, which will cause the capacitor to be insufficiently charged within a certain period of time.
  • a column of sub-pixels connected to the same data line has a similar problem, that is, the data signals received by the sub-pixels located far from the source driving chip 3 will be delayed, resulting in insufficient charging.
  • Both of the above two delay methods will cause the liquid crystal display to be insufficiently charged, causing the same signal to show different performances at different positions on the same panel, thereby causing the display quality of the panel to deteriorate. This problem becomes more pronounced as the panel size increases.
  • the liquid crystal display includes grid lines and data lines arranged in a cross, and a plurality of sub-pixels distributed in an array, the plurality of sub-pixels include a plurality of columns of sub-pixels corresponding to the data lines one-to-one, and each column of sub-pixels Each sub-pixel in is electrically connected to the corresponding data line respectively;
  • the step of generating a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data includes:
  • the abscissa of the index value of the second compensation data table includes the first target subpixel that is not corresponding to the first target subpixel in the adjacent two subpixels.
  • Grayscale compensation data the ordinate of the index value of the second compensation data table includes the first grayscale compensation data corresponding to the first target subpixel in the two adjacent subpixels, and the second compensation data table
  • the second grayscale compensation data corresponding to the index value one-to-one is stored in the , and the second grayscale compensation data is the second grayscale compensation data of the first target sub-pixel corresponding to the current frame image.
  • a data signal for writing into each of the first target sub-pixels is generated.
  • the above-mentioned liquid crystal display includes a plurality of gate lines and a plurality of data lines, and the gate lines and the data lines are arranged to cross each other.
  • the liquid crystal display further includes a plurality of sub-pixels distributed in an array, and the plurality of sub-pixels includes a plurality of rows of sub-pixels and a plurality of columns of sub-pixels.
  • the plurality of rows of sub-pixels are in one-to-one correspondence with the plurality of gate lines, so The plurality of columns of sub-pixels are in one-to-one correspondence with the plurality of data lines; the sub-pixels included in each row of sub-pixels are respectively electrically connected to the corresponding gate lines, and the sub-pixels included in each column of sub-pixels are respectively electrically connected to the corresponding data lines. connect.
  • the sub-pixel 403 and the sub-pixel 404 are two adjacent sub-pixels located in the same column.
  • the data line Source1 charges the sub-pixel 403, and when the gate line Gate2 is input
  • the scan signal of is at an active level, the data line Source1 charges the sub-pixel 404 .
  • FIG. 11 illustrates an N*M second compensation data table.
  • the abscissa of the index value of the second compensation data table includes the first sub-pixel that is not corresponding to the first target sub-pixel in the adjacent two sub-pixels.
  • a grayscale compensation data (such as G1-G6)
  • the ordinate of the index value of the second compensation data table includes the first grayscale compensation data corresponding to the first target subpixel in the two adjacent subpixels ( For example, T1 ⁇ TM)
  • the second compensation data table stores the second grayscale compensation data L of the current frame image corresponding to the index values one-to-one.
  • the second grayscale compensation data L can be the final compensated data, that is, it is not necessary to perform other operations on the second grayscale compensation data L, and the data signal can be obtained directly based on the second grayscale compensation data L .
  • the second grayscale compensation data L may be a difference value that needs to be compensated, that is, the difference value needs to be added to the initial grayscale data of the current frame image to obtain final compensated data, and then based on the final compensation value data to get the data signal.
  • T4 represents the first grayscale compensation data corresponding to the subpixel 404 (ie, the first target subpixel)
  • L represents the second grayscale compensation data corresponding to the first target subpixel displaying the current frame image.
  • the second gray-scale compensation data is formed by referring to the first gray-scale compensation data of the sub-pixel 403 , and is the data used when charging the sub-pixel 404 .
  • G2 takes a value of 60; T4 takes a value of 90; L takes a value of 100; in this case, L is the final compensated data.
  • the size of the second compensation data table is generally related to the bit depth (Bit-Depth) of the image data. For example, if the bit depth of the image data is n-bit, the second compensation data table needs a size of 2 n *2 n .
  • the second compensation data table can be down-sampled and stored with a certain step size.
  • the same The step size is up-sampled to approximately restore the corresponding second gray-scale compensation data.
  • the response time compensation module 105 can obtain the first gray-scale compensation data corresponding to each sub-pixel, the first gray-scale compensation data corresponding to each sub-pixel constitutes the first image compensation data corresponding to the current frame image, and the first image The compensation data is transmitted to the undercharge compensation module 106 .
  • the undercharge compensation module 106 obtains, from the pre-generated second compensation data table, according to the first gray-scale compensation data corresponding to all the adjacent two sub-pixels, the distance between the adjacent two sub-pixels is far away from all the adjacent sub-pixels.
  • the first target sub-pixel at the starting end of the data line corresponds to the second grayscale compensation data of the current frame image; that is, the undercharge compensation module 106 can obtain all the first target sub-pixels in the display panel corresponding to the current frame image.
  • the second grayscale compensation data The driving module 107 generates a data signal for writing into each of the first target sub-pixels based on the second gray-scale compensation data corresponding to each of the first target sub-pixels.
  • the second gray-scale compensation data of the first target sub-pixel in each column of sub-pixels is compensated based on the first gray-scale compensation data of the adjacent non-first target sub-pixels. Therefore, the display quality of different positions of the liquid crystal display can be consistent, and the difference existing when the same picture is displayed at different positions can be alleviated.
  • Figure 12 illustrates a gate driver module and a row of sub-pixels it controls.
  • the gate driver module may be located at position 202 on the left as shown in the example, and the gate driver module may be a conventional gate driver chip or GOA design.
  • the actual charging of the sub-pixel 405 and the sub-pixel 406 may be different, and the sub-pixel 406 far from the position 202 may be under-charged.
  • Figure 13 illustrates two gate driving modules and a row of sub-pixels controlled by them.
  • the gate driving modules may be located at the left 202 position and the right 203 position respectively as in the example, and the gate driving module may be a traditional gate driver IC or gate on array. design. Due to the location of the gate driving module, the charging of the sub-pixels 405, 406 and 407 may be different, and the 407 may be under-charged because it is far away from the gate driving module.
  • the abscissa in FIG. 14 represents the position, and the ordinate represents the charging rate.
  • the change curve of the charging rate is shown as curve 1101 .
  • the change curve of the charging rate is as shown in curve 1102.
  • r2 may also be different at the positions of p1 and p4.
  • the curve 1101 may also correspond to the charging performance of each sub-pixel electrically connected to a data line.
  • the plurality of sub-pixels includes a plurality of rows of sub-pixels corresponding to the gate lines one-to-one, and each sub-pixel in each row of the sub-pixels is electrically connected to the corresponding gate line respectively;
  • the step of generating a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data specifically includes:
  • the compensation parameter corresponding to the second target sub-pixel is obtained from the pre-generated third compensation data table; the abscissa of the index value of the third compensation data table Including the abscissa of the second target sub-pixel, the ordinate of the index value of the third compensation data table includes the ordinate of the second target sub-pixel, and the third compensation data table is stored with the index. Compensation parameters corresponding to one-to-one value;
  • a data signal for writing into the second target sub-pixel is generated based on the first gray-scale compensation data, the second gray-scale compensation data and the compensation parameter corresponding to each of the second target sub-pixels.
  • the abscissa of the index value of the third compensation data table includes the abscissa of the second target sub-pixel (eg, sub-pixel 406 ), and the ordinate of the index value of the third compensation data table includes the The ordinate of the second target sub-pixel, the third compensation data table stores compensation parameters one-to-one corresponding to the index value.
  • the specific acquisition method is as follows: according to the first gray-scale compensation data of the second target sub-pixel, and The first gray-scale compensation data of the sub-pixels located in the same column, adjacent to, and closer to the starting end of the data line with the second target sub-pixel are searched and obtained from the second compensation data table.
  • the second gray-scale compensation data corresponding to the target sub-pixel is searched and obtained from the second compensation data table.
  • the first grayscale compensation data of the second target sub-pixel may be obtained from the first compensation data table.
  • the step of generating a data signal for writing into the second target subpixel specifically includes: :
  • the second gray-scale compensation data corresponding to the second target sub-pixel is the difference value to be compensated for 10
  • the first gray-scale compensation data corresponding to the second target sub-pixel is 90
  • the second target sub-pixel corresponds to 90.
  • the compensation parameter corresponding to the sub-pixel is 1.1
  • the third gray-scale compensation data obtained by the second target sub-pixel after undergoing compensation along the grid line direction is 90+10*1.1, that is, the third gray-scale compensation data is 101.1.
  • the step of generating a data signal for writing into the second target subpixel includes: A data signal for writing into the second target sub-pixel is generated based on the third grayscale compensation data.
  • the compensation parameter corresponding to the second target sub-pixel is obtained from the pre-generated third compensation data table; Obtain the second grayscale compensation data corresponding to the second target sub-pixel in the second compensation data table; obtain the third grayscale compensation data according to the first grayscale compensation data, compensation parameters and the second grayscale compensation data level compensation data, and then a data signal written into the second target sub-pixel is obtained according to the third gray level compensation data.
  • the third grayscale compensation data of the second target sub-pixel is based on the second grayscale compensation data of the adjacent sub-pixels located in the same column, and its The position (that is, the distance between it and the initial end of the corresponding grid line) is compensated, so that the display quality of the liquid crystal display at different positions can be consistent, and the difference existing when the same picture is displayed at different positions is alleviated.
  • the second compensation data table and the third compensation data table may also be integrated into one compensation data table.
  • the third compensation data table can also be down-sampled and stored for cost saving, and then the intermediate data can be recovered by up-sampling in real time during actual chip operation.
  • the reference sub-pixel corresponding to the middle sub-pixel can be determined according to which gate line the middle sub-pixel is specifically located and connected to.
  • the first level of compensation is based on the changes of two adjacent frames of image data to compensate all sub-pixels;
  • the second level of compensation Compensation for the first target sub-pixel is based on the difference between the gray-scale data of two adjacent sub-pixels along the extension direction of the data line;
  • the third-level compensation is based on the extension direction of the gate line and the distance from the starting end of the gate line.
  • the second target sub-pixel at a certain distance is compensated; wherein the first level of compensation is compensation in the time domain, and the second and third levels of compensation are compensation in the space domain.
  • the display quality of the liquid crystal display is well improved. It will be sharper and has the effect of deblurring; at the same time, the display quality of different positions of the liquid crystal display tends to be consistent, which greatly reduces the differences in the display of the same picture in different positions.
  • the first compensation data table For the first compensation data table, the second compensation data table and the third compensation data table, the down-sampling storage performed, and the up-sampling recovery performed are as follows.
  • the third compensation data table after down-sampling is shown in FIG. 15 .
  • the parameter i represents the abscissa of the index value
  • the parameter j represents the ordinate of the index value.
  • A represents the initial compensation parameter determined according to the position data of the second target sub-pixel
  • B, C, and D are respectively the compensation parameters near A. According to the above algorithm, the final compensation of the second target sub-pixel is calculated. Compensation parameter G required.
  • the index value with the closest position can be found in the third compensation data table according to the position data of the second target sub-pixel as the index value corresponding to the second target sub-pixel.
  • G A*alpha1+B*beta1+D*theta1
  • H A*alpha2+C*beta2+D*theta2
  • the triangular difference in FIG. 17 includes the upper triangular difference method and the lower triangular difference method.
  • the upper triangular difference method or the lower triangular difference method can be determined according to the actual position of the sub-pixel to be compensated.
  • distance represents the distance function
  • area represents the area function
  • different sub-pixels in the display panel select different up-sampling differences.
  • the sub-pixels located near the diagonal line extending from the upper left corner to the lower right corner of FIG. 15 The pixel adopts the triangular difference value to obtain the corresponding compensation parameter; the sub-pixel far from the diagonal adopts the bilinear difference value to obtain the corresponding compensation parameter.
  • An embodiment of the present disclosure further provides a drive compensation device for a liquid crystal display, which is used to implement the drive compensation method provided by the above embodiments, the drive compensation device includes: an acquisition module, a response time compensation module, and a drive module;
  • the acquiring module is used for: acquiring image data corresponding to each frame of images to be displayed by the liquid crystal display;
  • the response time compensation module is used for: determining the first image compensation data corresponding to the current frame image according to the image data of the current frame image to be displayed by the liquid crystal display and the image data of the previous frame image;
  • the driving module is configured to: generate a data signal for writing into each sub-pixel included in the liquid crystal display based on the first image compensation data.
  • the drive compensation device When the drive compensation device provided by the embodiment of the present disclosure is used to drive the liquid crystal display to display, it can be determined according to the image data of the previous frame image and the image data of the current frame image, when the liquid crystal display switches from the previous frame image to the current frame image, the liquid crystal display corresponding inversion degree; and adaptively compensate the image data corresponding to the current frame image according to the inversion degree; so that after the data signal generated based on the first image compensation data is written into each sub-pixel, the response of the liquid crystal can be effectively improved speed, shorten the response time of the liquid crystal, and avoid the blurring phenomenon of the liquid crystal display when displaying the picture.
  • the obtaining module specifically includes: a receiving module, a compression module, a storage module, and a decompression module;
  • the receiving module is used to sequentially receive image data corresponding to each frame of image, and transmit the image data corresponding to each frame of image to the compression module and the response time compensation module respectively;
  • the compression module is used to compress the image data corresponding to each frame of image and save it in the storage module;
  • the decompression module is configured to decompress the image data corresponding to the previous frame of image from the storage module, and transmit it to the response time compensation module.
  • the image data corresponding to each frame of image includes initial grayscale data corresponding to each sub-pixel one-to-one;
  • the response time compensation module is specifically used for:
  • the initial grayscale data of the current frame image corresponding to each subpixel and the initial grayscale data of the previous frame image corresponding to each subpixel obtain the current frame image corresponding to each subpixel from the pre-generated first compensation data table the first gray-scale compensation data, generating first image compensation data corresponding to the current frame image according to the first gray-scale compensation data corresponding to each sub-pixel;
  • the abscissa of the index value of the first compensation data table includes the initial grayscale data of the previous frame image corresponding to the sub-pixel, and the ordinate of the index value of the first compensation data table includes the current frame image corresponding to the sub-pixel.
  • Initial grayscale data the first compensation data table stores first grayscale compensation data corresponding to index values one-to-one.
  • the liquid crystal display includes grid lines and data lines arranged in a cross, and a plurality of sub-pixels distributed in an array, the plurality of sub-pixels include a plurality of columns of sub-pixels corresponding to the data lines one-to-one, and each column of sub-pixels Each sub-pixel in the device is electrically connected to the corresponding data line respectively;
  • the drive compensation device further includes: an under-charge compensation module;
  • the under-charge compensation module is used for: acquiring the first gray-scale compensation data corresponding to all adjacent two sub-pixels in the same column of sub-pixels;
  • the first gray-scale compensation data corresponding to all the adjacent two sub-pixels and from the pre-generated second compensation data table, obtain each adjacent two sub-pixels that are far away from the starting end of the data line
  • the first target subpixel corresponds to the second grayscale compensation data of the current frame image
  • the abscissa of the index value of the second compensation data table includes the first target subpixel that is not corresponding to the first target subpixel in the adjacent two subpixels.
  • Grayscale compensation data, the ordinate of the index value of the second compensation data table includes the first grayscale compensation data corresponding to the first target subpixel in the two adjacent subpixels, and the second compensation data table
  • the second grayscale compensation data corresponding to the index value one-to-one is stored in the ;
  • the driving module is specifically configured to: generate a data signal for writing into each of the first target sub-pixels based on the second gray-scale compensation data corresponding to each of the first target sub-pixels.
  • the plurality of sub-pixels includes a plurality of rows of sub-pixels corresponding to the gate lines one-to-one, and each sub-pixel in each row of the sub-pixels is electrically connected to the corresponding gate line respectively;
  • the under-charge compensation module is further configured to: acquire position data corresponding to the second target sub-pixel in the plurality of sub-pixels;
  • the compensation parameter corresponding to the second target sub-pixel is obtained from the pre-generated third compensation data table; the abscissa of the index value of the third compensation data table Including the abscissa of the second target sub-pixel, the ordinate of the index value of the third compensation data table includes the ordinate of the second target sub-pixel, and the third compensation data table is stored with the index. Compensation parameters corresponding to one-to-one value;
  • the driving module is specifically configured to: based on the first gray-scale compensation data, the second gray-scale compensation data and the compensation parameters corresponding to the second target sub-pixel, generate a data signal.
  • Embodiments of the present disclosure further provide a liquid crystal display, including the drive compensation device provided by the above embodiments.
  • the sharpness of the moving picture is effectively improved without changing the liquid crystal display structure, and the display consistency of different display areas is improved. sex.
  • liquid crystal display device provided by the embodiments of the present disclosure includes the driving compensation device provided by the above embodiments, higher display quality can be achieved.
  • liquid crystal display can be any product or component with display function, such as a TV, a monitor, a digital photo frame, a mobile phone, and a tablet computer.
  • modules can all be implemented in the form of software calling through processing elements; they can also all be implemented in hardware; some modules can also be implemented in the form of calling software through processing elements, and some modules can be implemented in hardware.
  • the determination module may be a separately established processing element, or may be integrated into a certain chip of the above-mentioned device to be implemented, in addition, it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device may Call and execute the function of the above determined module.
  • the implementation of other modules is similar. In addition, all or part of these modules can be integrated together, and can also be implemented independently.
  • the processing element described here may be an integrated circuit with signal processing capability. In the implementation process, each step of the above-mentioned method or each of the above-mentioned modules can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.
  • each module, unit, sub-unit or sub-module may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuit (ASIC), or, one or Multiple microprocessors (digital signal processors, DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processors
  • FPGA Field Programmable Gate Array
  • the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip

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Abstract

La présente invention concerne un dispositif d'affichage à cristaux liquides, un procédé de compensation d'attaque associé et un appareil de compensation d'attaque associé. Le procédé de compensation d'attaque du dispositif d'affichage à cristaux liquides comprend les étapes consistant à : obtenir des données d'image correspondant à chaque trame d'image que le dispositif d'affichage à cristaux liquides doit afficher ; en fonction des données d'image de la trame d'image actuelle qui sera affichée par le dispositif d'affichage à cristaux liquides et en fonction des données d'image de la trame d'image précédente, déterminer des premières données de compensation d'image correspondant à la trame d'image actuelle ; sur la base des premières données de compensation d'image, générer un signal de données destiné à être écrit dans chaque sous-pixel compris dans le dispositif d'affichage à cristaux liquides.
PCT/CN2021/095483 2020-08-09 2021-05-24 Dispositif d'affichage à cristaux liquides et procédé de compensation d'attaque ainsi qu'appareil de compensation d'attaque associés WO2022033110A1 (fr)

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