WO2016197459A1 - 液晶面板及其驱动方法 - Google Patents

液晶面板及其驱动方法 Download PDF

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Publication number
WO2016197459A1
WO2016197459A1 PCT/CN2015/088026 CN2015088026W WO2016197459A1 WO 2016197459 A1 WO2016197459 A1 WO 2016197459A1 CN 2015088026 W CN2015088026 W CN 2015088026W WO 2016197459 A1 WO2016197459 A1 WO 2016197459A1
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sub
pixel unit
pixel
pair
liquid crystal
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PCT/CN2015/088026
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English (en)
French (fr)
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陈黎暄
康志聪
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深圳市华星光电技术有限公司
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Priority to US14/779,654 priority Critical patent/US20170154587A1/en
Publication of WO2016197459A1 publication Critical patent/WO2016197459A1/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
    • G09G3/36—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
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active 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
    • G09G3/36—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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction

Definitions

  • the present invention generally relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal panel and a driving method thereof.
  • a liquid crystal display or LCD (Liquid Crystal Display) is a flat, ultra-thin display device composed of a certain number of color or black-and-white pixels placed in front of a light source or a reflector.
  • LCD monitors have low power consumption and are characterized by high image quality, small size, and light weight. Therefore, they are favored by everyone and become the mainstream of displays.
  • Liquid crystal displays have been widely used in various electronic products, such as computer devices with display screens, mobile phones, or digital photo frames, and the wide viewing angle technology is one of the development priorities of current liquid crystal displays. However, when the viewing angle of the side view or the squint is too large, a wide-angle liquid crystal display often undergoes a color shift phenomenon.
  • each pixel unit (pixel) is divided into a main pixel area (Sub pixel) and a sub-pixel area (Sub pixel) having unequal areas, and a main pixel area in the same pixel unit and The sub-pixel regions are connected to different data lines and the same gate line.
  • 2D1G technology means that in the liquid crystal panel, each pixel unit (pixel) is divided into a main pixel area (Sub pixel) and a sub-pixel area (Sub pixel) having unequal areas, and a main pixel area in the same pixel unit and The sub-pixel regions are connected to different data lines and the same gate line.
  • the number of data lines of the input data signal is twice as large as the original, which greatly reduces the aperture ratio of the liquid crystal panel and affects the transmittance. , reducing the display quality of the liquid crystal panel.
  • an object of the present invention is to provide a liquid crystal panel and a driving method thereof, which can simulate the display of a 2D1G panel in a conventional RGB three-pixel liquid crystal panel by changing the driving method of the liquid crystal panel to overcome the color generated when the side view or the squint is generated.
  • the problem of partiality in addition, overcomes the problem of unevenly changing the fine image due to excessive brightness difference caused by simply dividing all blue sub-pixel units for higher gray level value/lower gray level value driving. .
  • a driving method of a liquid crystal panel includes: providing a liquid crystal panel including a matrix of pixel units of M rows ⁇ N columns, wherein M and N are greater than 1 a positive integer, wherein each pixel unit is composed of a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit in sequence, such that the liquid crystal panel includes a matrix of sub-pixel units of M rows ⁇ 3N columns, wherein In the sub-pixel unit matrix, the (m, 3n-2)th sub-pixel unit indicates a red sub-pixel unit, and the (m, 3n-1)th sub-pixel unit indicates a green sub-pixel unit, and the (m, 3n) sub-pixel unit Indicates a blue sub-pixel unit, m ⁇ [1, 2, 3, ..., M], n ⁇ [1, 2, 3, ..., N]; for the sub-pixel unit matrix, performs at least one of the following division operations Dividing operation: dividing a part of the following division operations Dividing operation: dividing a part
  • the first blue sub-pixel unit and the second blue sub-pixel unit in the pair of blue sub-pixel units may be adjacent sub-pixel units in the same column of blue sub-pixel units or may have a fixed interval
  • the adjacent sub-pixel unit; or the first red sub-pixel unit and the second red sub-pixel unit in the red sub-pixel unit pair may be adjacent sub-pixel units in the same column of red sub-pixel units or may have a fixed interval
  • the adjacent sub-pixel unit; or the first green sub-pixel unit and the second green sub-pixel unit in the pair of green sub-pixel units may be adjacent sub-pixel units in the same column of green sub-pixel units or may have There are fixed intervals of non-adjacent sub-pixel units.
  • the (i, j) sub-pixel unit and the (i, j) +3) may not be provided with respective higher gray scale values at the same time, and the (i, j)th sub-pixel unit and the (i, j+3) sub-pixel unit may not be provided with respective lower grays. Order value.
  • the (p, q)th sub-pixel unit and the (p,q+1)th sub-pixel unit may not be provided with respective higher grayscale values
  • the (p, q)th sub-pixel unit and the (p, q+1)th sub-pixel unit may not be provided with respective lower grayscale values.
  • the (p, q)th sub-pixel unit, the (p, q+1)th sub-pixel unit, and the (p, q+2) sub-pixel unit may not At the same time, respective higher grayscale values are provided, and the (p, q)th sub-pixel unit, the (p, q+1)th sub-pixel unit, and the (p, q+2) sub-pixel unit may be simultaneously provided. Their respective lower grayscale values.
  • the higher grayscale value BH and the lower grayscale value BL provided to each blue sub-pixel unit pair can be obtained by the following steps:
  • a higher grayscale value BH provided to the first blue subpixel unit of each blue subpixel unit pair and a second gray subpixel unit provided to each of the blue subpixel unit pairs The low gray level value BL satisfies the following relationship:
  • ⁇ 1 Lv ⁇ B+Lv ⁇ B-Lv ⁇ (BH)-Lv ⁇ (BL);
  • ⁇ 2 Lv ⁇ B+Lv ⁇ B-Lv ⁇ (BH)-Lv ⁇ (BL);
  • step S105 For each blue sub-pixel unit pair, according to step S104, a combination of a corresponding grayscale value BH and BL is obtained, and a display lookup table of the liquid crystal panel with respect to the blue sub-pixel unit is re-defined.
  • the higher grayscale value GH and the lower grayscale value GL provided to each green sub-pixel unit pair can be obtained by the following steps:
  • a higher grayscale value GH provided to the first green sub-pixel unit in each of the green sub-pixel unit pairs and a lower grayscale value provided to the second green sub-pixel unit in each of the green sub-pixel unit pairs GL satisfies the following relationship:
  • ⁇ 1 Lv ⁇ G+Lv ⁇ G-Lv ⁇ (GH)-Lv ⁇ (GL);
  • ⁇ 2 Lv ⁇ G+Lv ⁇ G-Lv ⁇ (GH)-Lv ⁇ (GL);
  • step S204 For each green sub-pixel unit pair, according to step S204, a combination of a corresponding grayscale value GH and GL is obtained, and a display lookup table of the liquid crystal panel with respect to the green sub-pixel unit is reformulated.
  • the combination of the higher grayscale value RH and the lower grayscale value RL provided to each pair of red sub-pixel units can be obtained by the following steps:
  • a higher grayscale value GH provided to the first red sub-pixel unit of each red sub-pixel unit pair and a lower grayscale value provided to the second red sub-pixel unit of each red sub-pixel unit pair RL satisfies the following relationship:
  • ⁇ 1 Lv ⁇ R-Lv ⁇ R-Lv ⁇ (RH)-Lv ⁇ (RL);
  • ⁇ 2 Lv ⁇ R-Lv ⁇ R-Lv ⁇ (RH)-Lv ⁇ (RL);
  • step S305 For each red sub-pixel unit pair, according to step S304, a combination of a corresponding grayscale value RH and RL is obtained, and a display lookup table of the liquid crystal panel with respect to the red sub-pixel unit is re-defined.
  • the front view angle ⁇ may be 0°, and the squint angle ⁇ may be 30 to 80°.
  • a liquid crystal panel including a gate controller, a source controller, and a pixel unit, wherein the gate controller supplies a scan signal to the pixel unit through a plurality of scan lines, and the source controller passes A plurality of data lines supply data signals to the pixel unit, wherein the driving method of the liquid crystal panel employs any of the driving methods described above.
  • the display of the 2D1G panel can be simulated by changing the driving method thereof in the conventional RGB three-pixel liquid crystal panel, and the side view or the squint can be reduced.
  • the resulting color shift does not reduce the aperture ratio of the liquid crystal panel.
  • it overcomes the difference in brightness caused by simply dividing all blue sub-pixel units for higher gray level values/lower gray level values. The problem that the fine image caused by the large size does not change smoothly, and the display quality of the liquid crystal panel is ensured.
  • FIG. 1 shows a schematic structural view of a liquid crystal panel according to an exemplary embodiment of the present invention
  • FIG. 2 is a schematic structural view of a pixel unit in a liquid crystal panel according to an exemplary embodiment of the present invention
  • FIG. 3 illustrates a flowchart of a driving method of a liquid crystal panel according to an exemplary embodiment of the present invention
  • FIG. 4 illustrates a schematic diagram of a sub-pixel unit matrix in a liquid crystal panel according to an exemplary embodiment of the present invention
  • FIG. 5 illustrates an example of an arrangement of pairs of blue sub-pixel units according to an exemplary embodiment of the present invention
  • FIG. 6 illustrates a flow chart of steps of providing a higher grayscale BH and a lower grayscale value BL to a pair of blue sub-pixel units, in accordance with an exemplary embodiment of the present invention
  • FIG. 7 illustrates an actual brightness profile of a front view angle and a squint angle of a blue sub-pixel in a liquid crystal panel, according to an exemplary embodiment of the present invention
  • FIG. 8 illustrates an example for explaining a rule of providing a higher grayscale value and a lower grayscale value to a sub-pixel unit, according to an exemplary embodiment of the present invention
  • FIG. 9 illustrates an example for explaining a rule of providing a higher grayscale value and a lower grayscale value to a sub-pixel unit according to another exemplary embodiment of the present invention.
  • FIG. 10 illustrates an example for explaining a rule of providing a higher grayscale value and a lower grayscale value to a sub-pixel unit, according to still another exemplary embodiment of the present invention.
  • FIG. 1 shows a schematic structural view of a liquid crystal panel according to an exemplary embodiment of the present invention.
  • the liquid crystal panel mainly includes a display area 1 having a plurality of pixel units a, b, a gate controller 2, and a source controller 3, wherein the gate controller 2 passes the plurality of scanning lines to the pixels.
  • the cells a, b provide scan signals, and the source controller 3 supplies data signals to the pixel cells a, b through a plurality of data lines.
  • FIG. 2 illustrates a schematic diagram of a pixel unit in a liquid crystal panel according to an exemplary embodiment of the present invention.
  • each pixel unit a includes a red sub-pixel unit Ra, a green sub-pixel unit Ga, and a blue sub-pixel unit Ba.
  • the purpose of this embodiment is to simulate the display of the 2D1G panel in the RGB three-pixel liquid crystal panel as above by changing the driving method of the liquid crystal panel, thereby achieving the problem of reducing the color shift generated when the side view or the squint is reduced.
  • FIG. 3 illustrates a flow chart of a driving method of a liquid crystal panel according to an exemplary embodiment of the present invention.
  • a liquid crystal panel is provided, wherein the liquid crystal panel includes pixel units of M rows ⁇ N columns, wherein M and N are positive integers greater than 1, wherein each pixel unit is sequentially replaced by a red sub-pixel.
  • the unit, the green sub-pixel unit, and the blue sub-pixel unit are configured such that the liquid crystal panel includes a matrix of sub-pixel units of M rows ⁇ 3N columns.
  • FIG. 4 illustrates a schematic diagram of a matrix of sub-pixel units in a liquid crystal panel, according to an exemplary embodiment of the present invention. Referring to FIG.
  • the (m, 3n-2)th sub-pixel unit indicates a red sub-pixel unit R
  • the (m, 3n-1)th sub-pixel unit indicates a green sub-pixel unit G
  • the (m, 3n) sub-pixel unit indicates the blue sub-pixel unit B, m ⁇ [1, 2, 3, ..., M], n ⁇ [1, 2, 3, ..., N].
  • step S200 for the sub-pixel unit matrix, at least one of the following division operations is performed: dividing a portion of the blue sub-pixel unit into a pair of blue sub-pixel units composed of a pair of blue sub-pixel units, the portion The red sub-pixel unit is divided into a pair of red sub-pixel units composed of a pair of red sub-pixel units, and the partial green sub-pixel unit is divided into pairs of green sub-pixel units composed of a pair of green sub-pixel units; or, for the sub-pixel unit a matrix, dividing all blue sub-pixel units into pairs of blue sub-pixel units composed of a pair of blue sub-pixel units, and performing at least one of the following division operations: dividing a portion of the red sub-pixel units into a pair A red sub-pixel unit pair composed of red sub-pixel units divides a portion of the green sub-pixel unit into a pair of green sub-pixel units composed of a pair of green sub-pixel units.
  • a driving pattern formed by a portion of the sub-pixel units in the at least one sub-pixel unit may be acquired, or all the blue sub-pixel units and at least one other sub-
  • the driving pattern formed by the partial sub-pixel units in the pixel unit can compensate for the imaging defects caused by simply dividing all the blue sub-pixel units for higher gray scale value/lower gray scale value driving.
  • composition of the pair of blue sub-pixel units will be described in detail with reference to FIG. 5 using a blue sub-pixel unit as an example.
  • (A) in FIG. 5 illustrates an example of an arrangement of pairs of blue sub-pixel units according to an exemplary embodiment of the present invention.
  • the first blue sub-pixel unit 1 and the second blue sub-pixel unit 2 in the blue sub-pixel unit pair indicated by the broken line may be the same column of blue sub-pixels.
  • (B) in FIG. 5 illustrates an example of another arrangement of blue sub-pixel unit pairs according to an exemplary embodiment of the present invention.
  • the first blue sub-pixel unit 3 and the second blue sub-pixel unit 4 in the blue sub-pixel unit pair indicated by the broken line may be the same column of blue sub-pixels.
  • the first red sub-pixel unit and the second red sub-pixel unit in the red sub-pixel unit pair may be adjacent sub-pixel units in the same column of red sub-pixel units or non-phases with fixed intervals
  • the neighboring sub-pixel unit; or the first green sub-pixel unit and the second green sub-pixel unit in the pair of green sub-pixel units may be adjacent sub-pixel units in the same column of green sub-pixel units or non-adjacent with fixed intervals Sub-pixel unit.
  • step S300 a higher grayscale value is provided to the first subpixel unit in the pair of subpixel units, and a lower grayscale value is provided to the second subpixel unit in the pair of subpixel units.
  • a higher grayscale value BH may be provided to the first blue sub-pixel unit of each blue sub-pixel unit pair, to the second blue sub-pixel unit of each of the blue sub-pixel unit pairs.
  • a lower grayscale value BL wherein the combination of the higher grayscale value BH and the lower grayscale value BL causes the luminance curve of the blue sub-pixel unit at a squint angle to approach a predetermined gamma curve; to each red sub Providing a higher grayscale value RH to the first red subpixel unit of the pixel unit pair, and providing a lower grayscale value RL to the second red subpixel unit of each pair of red subpixel units; wherein, the higher grayscale value a combination of RH and a lower grayscale value RL such that a luminance curve of the red sub-pixel unit at a squint angle approaches the predetermined gamma curve; providing a comparison to the first green sub-pixel unit of each green sub-pixel unit pair a high gray scale value GH, providing a lower gray scale value GL to the second green sub-pixel unit of each green sub-pixel unit pair; wherein the combination of the higher gray scale value GH and the lower gray scale value GL makes green Sub-pixel unit in
  • the Gamma curve (ie, the Gamma ( ⁇ ) curve) can be determined according to the needs of the actual liquid crystal panel, and the value of ⁇ can be 1.8 to 2.4.
  • the luminance curve of the blue sub-pixel unit at the squint angle indicates a continuous curve formed by the average value of the display luminance of all the pairs of blue sub-pixels at different values of ⁇ .
  • the front view angle ⁇ is 0°
  • the squint angle ⁇ ranges from 30 to 80°.
  • the blue sub-pixel is taken as an example to specifically provide a higher gray to the blue sub-pixel unit pair. Detailed steps of the order BH and the lower gray level value BL.
  • FIG. 6 illustrates a flow chart of steps of providing a higher gray level BH and a lower gray level value BL to a pair of blue sub-pixel units, in accordance with an exemplary embodiment of the present invention.
  • step S101 a relationship curve B 0 - Lv ⁇ B 0 of the actual luminance and gray scale value of the blue sub-pixel unit of the liquid crystal panel under the front view angle ⁇ is acquired;
  • step S102 a relationship curve B 0 - Lv ⁇ B 0 of the actual brightness of the blue sub-pixel unit of the liquid crystal panel at a squint angle ⁇ and a gray scale value is acquired;
  • step S103 according to the formula: Calculating the relationship between the theoretical brightness and the gray level value of the blue sub-pixel unit of the liquid crystal panel under the front view angle ⁇ and the squint angle ⁇ , respectively, B-Lv ⁇ B and B-Lv ⁇ B;
  • step S104 providing a higher grayscale value BH provided to the first blue sub-pixel unit of each of the blue sub-pixel unit pairs and providing a second gray sub-pixel unit to each of the blue sub-pixel unit pairs
  • the lower grayscale value BL satisfies the following relationship:
  • ⁇ 1 Lv ⁇ B+Lv ⁇ B-Lv ⁇ (BH)-Lv ⁇ (BL);
  • ⁇ 2 Lv ⁇ B+Lv ⁇ B-Lv ⁇ (BH)-Lv ⁇ (BL);
  • step S105 for each blue sub-pixel unit pair, according to step S104, a combination of corresponding gray scale values BH and BL is obtained, and the display of the liquid crystal panel with respect to the blue sub-pixel unit is reformulated. Lookup table.
  • each blue sub-pixel unit pair is provided with a higher gray-scale value BH and The specific process of the lower grayscale value BL is described in detail.
  • FIG. 7 is a graph showing actual brightness curves of a front view angle and a squint angle of a blue sub-pixel in a liquid crystal panel, as shown in FIG. 7, according to an exemplary embodiment of the present invention.
  • the gray scale of the liquid crystal panel includes 256 gray scale values, ranging from 0 to 255.
  • a higher grayscale value B1H provided to the first blue sub-pixel unit 1 of each of the blue sub-pixel unit pairs and a second blue sub-pixel unit 2 to each of the blue sub-pixel unit pairs
  • the lower grayscale value B2L provided satisfies the following relationship to satisfy the following relationship:
  • ⁇ 2 Lv60R-Lv60R-Lv60(B1H)-Lv60(B2L);
  • Lv0B and Lv60B are obtained from the theoretical brightness curves B-Lv0B and B-Lv60B.
  • Lv0(B1H) and Lv0(B2L) are found from the actual brightness curve B 0 -Lv0B 0 , from the actual brightness curve.
  • B 0 -Lv60B 0 finds Lv60 (B1H) and Lv60 (B2L), so that the value of y in the above relation is minimized, and the corresponding grayscale values B1H and B2L are obtained.
  • the (i, j) sub-pixel unit and The (i, j+3) sub-pixel units are not simultaneously provided with respective higher gray scale values, and the (i, j)th sub-pixel unit is provided different from the (i, j+3) sub-pixel unit Their respective lower grayscale values. That is to say, for a sub-pixel unit of the same color, the sub-pixel unit among adjacent pixels is not simultaneously provided with a higher grayscale value or a lower grayscale value.
  • the rule of FIG. 8 is satisfied.
  • the (p, q) sub-pixel unit and the (p) , q+1) sub-pixel units are not provided with respective higher gray scale values, and the (p, q)th sub-pixel unit is provided differently from the (p, q+1)th sub-pixel unit.
  • Low grayscale value That is, in the case where the higher grayscale value and the lower grayscale value are provided only for the two color sub-pixel units in the liquid crystal panel, the sub-pixel units of the two colors adjacent in position are not simultaneously provided. Higher grayscale values or lower grayscale values.
  • the rule shown in FIG. 8 is satisfied.
  • the (p, q) sub-pixel unit, the (p, q +1) the sub-pixel unit is supplied with a higher gray scale value than the (p, q+2) sub-pixel unit, and the (p, q)th sub-pixel unit, (p, q+1)
  • the sub-pixel unit is provided with a respective lower gray scale value when it is not the same as the (p, q+2) sub-pixel unit. That is, in the case of providing higher grayscale values and lower grayscale values for the three color sub-pixel units in the liquid crystal panel, the three sub-pixel units adjacent in position are not simultaneously provided with a higher grayscale Value or lower grayscale value.
  • the display of the 2D1G panel can be simulated by changing the driving method thereof in the conventional RGB three-pixel liquid crystal panel, and the color shift generated in the side view or the squint can be reduced.
  • the display of the 2D1G panel can be simulated by changing the driving method thereof in the conventional RGB three-pixel liquid crystal panel, and the color shift generated in the side view or the squint can be reduced.
  • the aperture ratio of the smaller liquid crystal panel without reducing the aperture ratio of the smaller liquid crystal panel, in addition, The problem of the smooth change of the fine image due to the excessive difference in brightness caused by the high gray scale value/lower gray scale value driving is simply divided, and the display of the liquid crystal panel is ensured. quality.

Abstract

提供了一种液晶面板及其驱动方法。该方法包括：提供一液晶面板（S100），该液晶面板包括M行×N列的像素单元矩阵，其中，每个像素单元依次由红色子像素单元、绿色子像素单元和蓝色子像素单元组成，使得该液晶面板包括M行×3N列的子像素单元矩阵，针对子像素单元矩阵，执行划分操作（S200），并向每个颜色子像素单元对中的第一子像素单元提供较高灰阶值BH，向每个颜色像素单元对中的第二蓝色子像素单元提供较低灰阶值BL（S300），使得每个颜色子像素单元在斜视角度下的亮度曲线趋近于预定Gamma曲线。根据该液晶面板及其驱动方法，能够降低在侧看或斜视液晶面板时产生的色偏。

Description

液晶面板及其驱动方法 技术领域
本发明总体说来涉及液晶显示器技术领域,尤其涉及一种液晶面板及其驱动方法。
背景技术
液晶显示器，或称LCD(Liquid Crystal Display)，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射板前方。液晶显示器功耗很低，并且具有高画质、体积小、重量轻的特点，因此倍受大家青睐，成为显示器的主流。液晶显示器已广泛使用于各种电子产品中，例如，具显示屏幕的计算机设备、行动电话、或数字相框等，而广视角技术为目前液晶显示器的发展重点之一。然而，当侧看或斜视的视角过大时，广视角液晶显示器常会发生色偏(color shift)现象。
对于广视角液晶显示器发生色偏现象的问题，目前业界中出现了一种采用2D1G技术进行改善的解决方案。所谓2D1G技术，就是指在液晶面板中，将每一像素单元(pixel)分为面积不等的主像素区域(Main pixel)和次像素区域(Sub pixel),同一像素单元中的主像素区域和次像素区域连接到不同的数据线(Data line)和相同扫描线(Gate line)。通过对主像素区域和次像素区域输入不同的数据信号(不同的灰阶值)，产生不同的显示亮度和斜视亮度，达到降低侧看或斜视时产生的色偏问题。但是，对于每一个像素单元，划分为主像素区域和次像素区域之后，其输入数据信号的数据线的数量为原来的两倍，这会大大减小了液晶面板的开口率，影响穿透率，降低了液晶面板的显示质量。
发明内容
有鉴于此，本发明目的是提供一种液晶面板及其驱动方法，通过改变液晶面板的驱动方法，在传统的RGB三像素液晶面板中模拟2D1G面板的显示，以克服侧看或斜视时产生色偏的问题，此外，还克服了单纯划分出全部蓝色子像素单元进行较高灰阶值/较低灰阶值驱动带来的由于亮度差异过大而导致的精细图像出现不平滑变化的问题。
根据本发明示例性实施例的一方面，提供一种液晶面板的驱动方法，包括：提供一液晶面板，所述液晶面板包括M行×N列的像素单元矩阵，其中，M、N为大于1的正整数，其中，每个像素单元依次由红色子像素单元、绿色子像素单元和蓝色子像素单元组成，使得所述液晶面板包括M行×3N列的子像素单元矩阵，其中，在所述子像素单元矩阵中，第(m，3n-2)子像素单元指示红色子像素单元，第(m，3n-1)子像素单元指示绿色子像素单元，第(m，3n)子像素单元指示蓝色子像素单元，m∈[1,2,3,…,M]，n∈[1,2,3,…,N]；针对子像素单元矩阵，执行以下划分操作中的至少一种划分操作：将部分蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对、将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对；或者，针对子像素单元矩阵，将全部蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对，并执行以下划分操作中的至少一种：将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对，其中，向每个蓝色子像素单元对中的第一蓝色子像素单元提供较高灰阶值BH，向每个蓝色子像素单元对中的第二蓝色子像素单元提供较低灰阶值BL；其中，较高灰阶值BH与较低灰阶值BL的组合，使得蓝色子像素单元在斜视角度下的亮度曲线趋近于预定Gamma曲线；向每个红色子像素单元对中的第一红色子像素单元提供较高灰阶值RH，向每个红色子像素单元对中的第二红色子像素单元提供较低灰阶值RL；其中，较高灰阶值RH与较低灰阶值RL的组合，使得红色子像素单元在斜视角度下的亮度曲线趋近于所述预定Gamma曲线；向每个绿色子像素单元对中的第一绿色子像素单元提供较高灰阶值GH，向每个绿色子像素单元对中的第二绿色子像素单元提供较低灰阶值GL；其中，较高灰阶值GH与较低灰阶值GL的组合，使得绿色子像素单元在斜视角度下的亮度曲线趋近于所述预定Gamma曲线。
可选地，蓝色子像素单元对中的第一蓝色子像素单元与第二蓝色子像素单元可以为同一列蓝色子像素单元中的相邻子像素单元或可具有固定间隔的非相邻子像素单元；或者，红色子像素单元对中的第一红色子像素单元与第二红色子像素单元可以为同一列红色子像素单元中的相邻子像素单元或可具有固定间隔的非相邻子像素单元；或者，绿色子像素单元对中的第一绿色子像素单元与第二绿色子像素单元可以为同一列绿色子像素单元中的相邻子像素单元或可具 有固定间隔的非相邻子像素单元。
可选地，对于i∈[1,2,3,…,M]，j∈[1,2,3,…,3N-3]，第(i，j)子像素单元与第(i，j+3)子像素单元可不同时被提供各自的较高灰阶值，并且，第(i，j)子像素单元与第(i，j+3)子像素单元可不同时被提供各自的较低灰阶值。
可选地，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对之中的两种子像素单元对的液晶面板，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-1]，第(p，q)子像素单元与第(p，q+1)子像素单元可不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元与第(p，q+1)子像素单元可不同时被提供各自的较低灰阶值。
可选地，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对这三种子像素单元对的液晶面板，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-2]，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元可不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元可不同时被提供各自的较低灰阶值。
可选地，向每个蓝色子像素单元对提供的较高灰阶值BH和较低灰阶值BL可通过以下步骤来获得：
S101、获取所述液晶面板的蓝色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线B0-LvαB0；
S102、获取所述液晶面板的蓝色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线B0-LvβB0；
S103、根据公式：
Figure PCTCN2015088026-appb-000001
分别计算所述液晶面板的蓝色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线B-LvαB和B-LvβB；
S104、向每个蓝色子像素单元对中的第一蓝色子像素单元提供的较高灰阶值BH与向每个蓝色子像素单元对中的第二蓝色子像素单元提供的较低灰阶值BL满足以下关系式：
Δ1＝LvαB+LvαB-Lvα(BH)-Lvα(BL)；
Δ2＝LvβB+LvβB-Lvβ(BH)-Lvβ(BL)；
y1＝Δ12+Δ22；
其中，y1取最小值，LvαB和LvβB的取值从关系曲线B-LvαB和B-LvβB查找取得，Lvα(BH)和Lvα(BL)的取值从关系曲线B0-LvαB0查找取得，Lvβ(BH)和Lvβ(BL)的取值从关系曲线B0-LvβB0查找取得；
S105、对于每个蓝色子像素单元对，根据步骤S104，都获得相应的一个灰阶值BH与BL的组合，重新制定该液晶面板关于蓝色子像素单元的显示查找表。
可选地，向每个绿色子像素单元对提供的较高灰阶值GH和较低灰阶值GL可通过以下步骤来获得：
S201、获取所述液晶面板的绿色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线G0-LvαG0；
S202、获取所述液晶面板的绿色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线G0-LvβG0；
S203、根据公式：
Figure PCTCN2015088026-appb-000002
分别计取所述液晶面板的绿色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线G-LvαG和G-LvβG；
S204、向每个绿色子像素单元对中的第一绿色子像素单元提供的较高灰阶值GH与向每个绿色子像素单元对中的第二绿色子像素单元提供的较低灰阶值GL满足以下关系式：
Δ1＝LvαG+LvαG-Lvα(GH)-Lvα(GL)；
Δ2＝LvβG+LvβG-Lvβ(GH)-Lvβ(GL)；
y2＝Δ12+Δ22；
其中，y2取最小值，LvαG和LvβG的取值从关系曲线G-LvαG和G-LvβG查找取得，Lvα(GH)和Lvα(GL)的取值从关系曲线G0-LvαG0查找取得，Lvβ(GH)和Lvβ(GL)的取值从关系曲线G0-LvβG0查找取得；
S205、对于每个绿色子像素单元对，根据步骤S204，都获得相应的一个灰阶值GH与GL的组合，重新制定该液晶面板关于绿色子像素单元的显示查找表。
可选地，向每个红色子像素单元对提供的较高灰阶值RH和较低灰阶值RL组合可通过以下步骤来获得：
S301、获取所述液晶面板的红色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线R0-LvαR0；
S302、获取所述液晶面板的红色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线R0-LvβR0；
S303、根据公式：
Figure PCTCN2015088026-appb-000003
分别计算所述液晶面板的红色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线R-LvαR和R-LvβR；
S304、向每个红色子像素单元对中的第一红色子像素单元提供的较高灰阶值GH与向每个红色子像素单元对中的第二红色子像素单元提供的较低灰阶值RL满足以下关系式：
Δ1＝LvαR-LvαR-Lvα(RH)-Lvα(RL)；
Δ2＝LvβR-LvβR-Lvβ(RH)-Lvβ(RL)；
y3＝Δ12+Δ22；
其中，y3取最小值，LvαR和LvβR的取值从关系曲线R-LvαR和R-LvβR查找取得，Lvα(RH)和Lvα(RL)的取值从关系曲线R0-LvαR0查找取得，Lvβ(RH)和Lvβ(RL)的取值从关系曲线R0-LvβR0查找取得；
S305、对于每个红色子像素单元对，根据步骤S304，都获得相应的一个灰阶值RH与RL的组合，重新制定该液晶面板关于红色子像素单元的显示查找表。
可选地，所述正视角度α可以为0°，所述斜视角度β可以为30～80°。
本发明的另一方面是提供一种液晶面板，包括栅控制器、源控制器以及像素单元，所述栅控制器通过多条扫描线向所述像素单元提供扫描信号，所述源控制器通过多条数据线向所述像素单元提供数据信号，其特征在于，所述液晶面板的驱动方法采用以上所述的任一驱动方法。
有益效果：
根据本发明提供的液晶面板及其驱动方法，可以在传统的RGB三像素液晶面板中通过改变其驱动方法模拟2D1G面板的显示，能够降低在侧看或斜视时 产生的色偏，同时又不减较小液晶面板的开口率，此外，还克服了单纯划分出全部蓝色子像素单元进行较高灰阶值/较低灰阶值驱动带来的由于亮度差异过大而导致的精细图像出现不平滑变化的问题，保障了液晶面板的显示品质。
附图说明
通过下面结合附图进行的详细描述，本发明示例性实施例的上述和其它目的、特点和优点将会变得更加清楚，其中：
图1示出根据本发明示例性实施例的液晶面板的结构示意图；
图2示出根据本发明示例性实施例的液晶面板中的像素单元的结构示意图；
图3示出根据本发明示例性实施例的液晶面板的驱动方法的流程图；
图4示出根据本发明示例性实施例的液晶面板中的子像素单元矩阵的示意图；
图5示出根据本发明示例性实施例的蓝色子像素单元对的排列方式的示例；
图6示出根据本发明示例性实施例的向蓝色子像素单元对提供较高灰阶BH和较低灰阶值BL的步骤的流程图；
图7示出根据本发明示例性实施例的液晶面板中蓝色子像素的正视角度和斜视角度的实际亮度曲线图；
图8示出用于解释根据本发明示例性实施例的向子像素单元提供较高灰阶值和较低灰阶值的规则的示例；
图9示出用于解释根据另一本发明示例性实施例的向子像素单元提供较高灰阶值和较低灰阶值的规则的示例；
图10示出用于解释根据本发明又一示例性实施例的向子像素单元提供较高灰阶值和较低灰阶值的规则的示例。
具体实施方式
现将详细参照本发明的示例性实施例，所述实施例的示例在附图中示出，其中，相同的标号始终指的是相同的部件。以下将通过参照附图来说明所述实施例，以便解释本发明。
图1示出根据本发明示例性实施例的液晶面板的结构示意图。如图1所示，液晶面板主要包括具有多个像素单元a、b的显示区域1、栅控制器2和源控制器3，其中，所述栅控制器2通过多条扫描线向所述像素单元a、b提供扫描信号，所述源控制器3通过多条数据线向所述像素单元a、b提供数据信号。
图2示出根据本发明示例性实施例的液晶面板中的像素单元的示意图。参照图2，每一像素单元a包括红色子像素单元Ra、绿色子像素单元Ga以及蓝色子像素单元Ba。
本实施例的目的是通过改变液晶面板的驱动方法，在如上的RGB三像素液晶面板中模拟2D1G面板的显示，达到降低侧看或斜视时产生的色偏问题。
为此，本发明采用了如下的技术方案：
图3示出根据本发明示例性实施例的液晶面板的驱动方法的流程图。参照图3，在步骤S100，提供一液晶面板，所述液晶面板包括M行×N列的像素单元，其中，M、N为大于1的正整数，其中，每个像素单元依次由红色子像素单元、绿色子像素单元和蓝色子像素单元组成，使得所述液晶面板包括M行×3N列的子像素单元矩阵。图4示出根据本发明示例性实施例的液晶面板中的子像素单元矩阵的示意图。参照图4，在所述子像素单元矩阵中，第(m，3n-2)子像素单元指示红色子像素单元R，第(m，3n-1)子像素单元指示绿色子像素单元G，第(m，3n)子像素单元指示蓝色子像素单元B，m∈[1,2,3,…,M]，n∈[1,2,3,…,N]。
在步骤S200，针对子像素单元矩阵，执行以下划分操作中的至少一种划分操作：将部分蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对，将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对；或者，针对子像素单元矩阵，将全部蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对，并执行以下划分操作中的至少一种：将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对。
可以看出，根据上述划分方式，可获取至少一种子像素单元中的部分子像素单元构成的驱动图案，或者，可获取全部蓝色子像素单元与至少一种其他子 像素单元中的部分子像素单元构成的驱动图案，从而能够弥补单纯划分出全部蓝色子像素单元进行较高灰阶值/较低灰阶值驱动带来的成像缺陷。
下面，将结合图5以蓝色子像素单元为例来详细说明蓝色子像素单元对的组成。
具体说来，图5中的(A)示出根据本发明示例性实施例的蓝色子像素单元对的排列方式的示例。具体说来，参照图5中的(A)，虚线所示的蓝色子像素单元对中的第一蓝色子像素单元1与第二蓝色子像素单元2可以为同一列蓝色子像素单元中的相邻子像素单元。图5中的(B)示出根据本发明示例性实施例的蓝色子像素单元对的另一种排列方式的示例。具体说来，参照图5中的(B)，虚线所示的蓝色子像素单元对中的第一蓝色子像素单元3与第二蓝色子像素单元4可以为同一列蓝色子像素单元中的具有固定间隔的非相邻子像素单元，这里，图5中的(B)所示的固定间隔为1个蓝色子像素单元，但是应理解，所述固定间隔可以是任意个蓝色子像素单元，在这里不做任何限制。
此外，基于同样的划分规则，红色子像素单元对中的第一红色子像素单元与第二红色子像素单元可以为同一列红色子像素单元中的相邻子像素单元或具有固定间隔的非相邻子像素单元；或者，绿色子像素单元对中的第一绿色子像素单元与第二绿色子像素单元可以为同一列绿色子像素单元中的相邻子像素单元或具有固定间隔的非相邻子像素单元。
再次参照图3，在步骤S300，向子像素单元对中的第一子像素单元提供较高灰阶值，向子像素单元对中的第二子像素单元提供较低灰阶值。
这里，可针对划分出的每一种颜色的子像素单元对进行较高灰阶值和较低灰阶值的分配。具体说来，可向每个蓝色子像素单元对中的第一蓝色子像素单元提供较高灰阶值BH，向每个蓝色子像素单元对中的第二蓝色子像素单元提供较低灰阶值BL；其中，较高灰阶值BH与较低灰阶值BL的组合，使得蓝色子像素单元在斜视角度下的亮度曲线趋近于预定Gamma曲线；向每个红色子像素单元对中的第一红色子像素单元提供较高灰阶值RH，向每个红色子像素单元对中的第二红色子像素单元提供较低灰阶值RL；其中，较高灰阶值RH与较低灰阶值RL的组合，使得红色子像素单元在斜视角度下的亮度曲线趋近于所述预定Gamma曲线；向每个绿色子像素单元对中的第一绿色子像素单元提供较高灰阶值GH，向每个绿色子像素单元对中的第二绿色子像素单元提供较低灰阶值GL；其中，较高灰阶值GH与较低灰阶值GL的组合，使得绿色子像素单元在斜视角 度下的亮度曲线趋近于所述预定Gamma曲线。
这里，Gamma曲线(即，Gamma(γ)曲线)可根据实际液晶面板的需要确定，γ的取值可以为1.8～2.4。以蓝色子像素单元为例，所述蓝色子像素单元在斜视角度下的亮度曲线指示由所有蓝色子像素对的显示亮度平均值在不同的γ取值下所形成的连续曲线。
其中，所述正视角度α为0°，所述斜视角度β的范围是30～80°，下面，结合图6以蓝色子像素为例来具体说明向蓝色子像素单元对提供较高灰阶BH和较低灰阶值BL的详细步骤。
图6示出根据本发明示例性实施例的向蓝色子像素单元对提供较高灰阶BH和较低灰阶值BL的步骤的流程图。
参照图6，在步骤S101，获取所述液晶面板的蓝色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线B0-LvαB0；
在步骤S102，获取所述液晶面板的蓝色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线B0-LvβB0；
在步骤S103，根据公式：
Figure PCTCN2015088026-appb-000004
分别计算所述液晶面板的蓝色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线B-LvαB和B-LvβB；
在步骤S104，向每个蓝色子像素单元对中的第一蓝色子像素单元提供的较高灰阶值BH与向每个蓝色子像素单元对中的第二蓝色子像素单元提供的较低灰阶值BL满足以下关系式：
Δ1＝LvαB+LvαB-Lvα(BH)-Lvα(BL)；
Δ2＝LvβB+LvβB-Lvβ(BH)-Lvβ(BL)；
y1＝Δ12+Δ22；
其中，y1取最小值，LvαB和LvβB的取值从关系曲线B-LvαB和B-LvβB查找取得，Lvα(BH)和Lvα(BL)的取值从关系曲线B0-LvαB0查找取得，Lvβ(BH)和Lvβ(BL)的取值从关系曲线B0-LvβB0查找取得；
在步骤S105，对于每个蓝色子像素单元对，根据步骤S104，都获得相应的一个灰阶值BH与BL的组合，重新制定该液晶面板关于蓝色子像素单元的显示 查找表。
下面以预定的Gamma(γ)曲线中γ＝2.2，正视角度α＝0°，斜视角度β＝60°为具体的例子，对向每个蓝色子像素单元对提供较高灰阶值BH和较低灰阶值BL的具体过程进行详细说明。
首先，分别获取所述液晶面板的蓝色子像素单元在正视角度α＝0°下的实际亮度与灰阶值的关系曲线B0-Lv0B0和在斜视角度β＝60°下的实际亮度与灰阶值的关系曲线B0-Lv60B0。图7示出根据本发明示例性实施例的液晶面板中蓝色子像素的正视角度和斜视角度的实际亮度曲线图，如图7所示的关系曲线图。其中该液晶面板的灰阶包括256个灰阶值，从0～255。
然后，根据公式：
Figure PCTCN2015088026-appb-000005
分别计算获取液晶面板的蓝色子像素单元在正视角度α＝0°和斜视角度β＝60°下的理论亮度与灰阶值的关系曲线B-Lv0B和B-Lv60B。其中，在前述公式中，正视角度α＝0°时Lv(255)取前述曲线B0-Lv0B0中B0＝255对应的亮度值，在斜视角度β＝60°时Lv(255)取前述曲线B0-Lv60B0中B0＝255对应的亮度值。
进一步地，向每个蓝色子像素单元对中的第一蓝色子像素单元1提供的较高灰阶值B1H与向每个蓝色子像素单元对中的第二蓝色子像素单元2提供的较低灰阶值B2L满足以下关系式满足以下关系式：
Δ1＝Lv0B-Lv0B-Lv0(B1H)-Lv0(B2L)；
Δ2＝Lv60R-Lv60R-Lv60(B1H)-Lv60(B2L)；
y1＝Δ12+Δ22；
其中，从理论亮度曲线B-Lv0B和B-Lv60B查找取得Lv0B和Lv60B的取值，此时，从实际亮度曲线B0-Lv0B0查找出Lv0(B1H)和Lv0(B2L)，从实际亮度曲线B0-Lv60B0查找Lv60(B1H)和Lv60(B2L)，使得上述关系式中y的取值最小，得到相应的灰阶值B1H与B2L。
最后，根据前述的计算方式都获得相应的一个B1H与B2L的组合，重新制定该液晶面板关于蓝色子像素单元的显示查找表。在驱动液晶面板时，若显示一幅画面时，从该显示查找表中确定向第一像素单元1中的蓝色子像素B1提供灰阶值B1H，向所述第二像素单元2中的蓝色子像素B2提供灰阶值B2L。
此外，可基于同样的方式向红色或绿色子像素对提供相应的较高灰阶值和 较低灰阶值，在此将不再赘述。
作为优选方式，在向各个子像素单元对分配较高灰阶值和较低灰阶值时，可考虑同种颜色的子像素单元或位置上彼此邻近的子像素单元之间的影响，通过形成特定的驱动图案来保证液晶面板的成像质量。
以下，将结合图8-图11来具体说明针对图4示出的液晶面板如何向各个子像素单元提供较高灰阶值和较低灰阶值的示例性规则。
如图8所示，作为示例，对于i∈[1,2,3,…,M]，j∈[1,2,3,…,3N-3]，第(i，j)子像素单元与第(i，j+3)子像素单元不同时被提供各自的较高灰阶值，并且，第(i，j)子像素单元与第(i，j+3)子像素单元不同时被提供各自的较低灰阶值。也就是说，对于同一种颜色的子像素单元而言，相邻像素之中的该子像素单元不会同时被提供较高灰阶值或较低灰阶值。
作为示例，如图9所示，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对之中的两种子像素单元对的液晶面板，在满足图8所示规则的情况下，进一步地，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-1]，第(p，q)子像素单元与第(p，q+1)子像素单元不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元与第(p，q+1)子像素单元不同时被提供各自的较低灰阶值。也就是说，在仅针对液晶面板中的两种颜色子像素单元提供较高灰阶值和较低灰阶值的情况下，位置上相邻的两种颜色的子像素单元不会同时被提供较高灰阶值或较低灰阶值。
作为示例，如图10所示，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对这三种子像素单元对的液晶面板，在满足图8所示规则的情况下，进一步地，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-2]，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元不同时被提供各自的较低灰阶值。也就是说，在针对液晶面板中的三种颜色子像素单元提供较高灰阶值和较低灰阶值的情况下，位置上相邻的三种子像素单元不会同时被提供较高灰阶值或较低灰阶值。
在根据本发明示例性实施例的液晶面板及其驱动方法中，可以在传统的RGB三像素液晶面板中通过改变其驱动方法模拟2D1G面板的显示，能够降低在侧看或斜视时产生的色偏，同时又不减较小液晶面板的开口率，此外，还克 服了单纯划分出全部蓝色子像素单元进行较高灰阶值/较低灰阶值驱动带来的由于亮度差异过大而导致的精细图像出现不平滑变化的问题，保障了液晶面板的显示品质。
显然，本发明的保护范围并不局限于上诉的具体实施方式，本领域的技术人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (10)

  1. 一种液晶面板的驱动方法，包括：
    提供一液晶面板，所述液晶面板包括M行×N列的像素单元矩阵，其中，M、N为大于1的正整数，其中，每个像素单元依次由红色子像素单元、绿色子像素单元和蓝色子像素单元组成，使得所述液晶面板包括M行×3N列的子像素单元矩阵，其中，在所述子像素单元矩阵中，第(m，3n-2)子像素单元指示红色子像素单元，第(m，3n-1)子像素单元指示绿色子像素单元，第(m，3n)子像素单元指示蓝色子像素单元，m∈[1,2,3,…,M]，n∈[1,2,3,…,N]；
    针对子像素单元矩阵，执行以下划分操作中的至少一种划分操作：将部分蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对、将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对；或者，针对子像素单元矩阵，将全部蓝色子像素单元划分为由一对蓝色子像素单元组成的蓝色子像素单元对，并执行以下划分操作中的至少一种：将部分红色子像素单元划分为由一对红色子像素单元组成的红色子像素单元对、将部分绿色子像素单元划分为由一对绿色子像素单元组成的绿色子像素单元对，
    其中，向每个蓝色子像素单元对中的第一蓝色子像素单元提供较高灰阶值BH，向每个蓝色子像素单元对中的第二蓝色子像素单元提供较低灰阶值BL；其中，较高灰阶值BH与较低灰阶值BL的组合，使得蓝色子像素单元在斜视角度下的亮度曲线趋近于预定Gamma曲线；向每个红色子像素单元对中的第一红色子像素单元提供较高灰阶值RH，向每个红色子像素单元对中的第二红色子像素单元提供较低灰阶值RL；其中，较高灰阶值RH与较低灰阶值RL的组合，使得红色子像素单元在斜视角度下的亮度曲线趋近于所述预定Gamma曲线；向每个绿色子像素单元对中的第一绿色子像素单元提供较高灰阶值GH，向每个绿色子像素单元对中的第二绿色子像素单元提供较低灰阶值GL；其中，较高灰阶值GH与较低灰阶值GL的组合，使得绿色子像素单元在斜视角度下的亮度曲线趋近于所述预定Gamma曲线。
  2. 如权利要求1所述的方法，其中，蓝色子像素单元对中的第一蓝色子像素单元与第二蓝色子像素单元为同一列蓝色子像素单元中的相邻子像素单元或具有固定间隔的非相邻子像素单元；或者，红色子像素单元对中的第一红色子 像素单元与第二红色子像素单元为同一列红色子像素单元中的相邻子像素单元或具有固定间隔的非相邻子像素单元；或者，绿色子像素单元对中的第一绿色子像素单元与第二绿色子像素单元为同一列绿色子像素单元中的相邻子像素单元或具有固定间隔的非相邻子像素单元。
  3. 如权利要求2所述的方法，其中，对于i∈[1,2,3,…,M]，j∈[1,2,3,…,3N-3]，第(i，j)子像素单元与第(i，j+3)子像素单元不同时被提供各自的较高灰阶值，并且，第(i，j)子像素单元与第(i，j+3)子像素单元不同时被提供各自的较低灰阶值。
  4. 如权利要求3所述的方法，其中，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对之中的两种子像素单元对的液晶面板，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-1]，第(p，q)子像素单元与第(p，q+1)子像素单元不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元与第(p，q+1)子像素单元不同时被提供各自的较低灰阶值。
  5. 如权利要求3所述的方法，其中，针对划分出蓝色子像素单元对、红色子像素单元对和绿色子像素单元对这三种子像素单元对的液晶面板，对于p∈[1,2,3,…,M]，q∈[1,2,3,…,3N-2]，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元不同时被提供各自的较高灰阶值，并且，第(p，q)子像素单元、第(p，q+1)子像素单元与第(p，q+2)子像素单元不同时被提供各自的较低灰阶值。
  6. 如权利要求1所述的方法，其中，向每个蓝色子像素单元对提供的较高灰阶值BH和较低灰阶值BL通过以下步骤来获得：
    S101、获取所述液晶面板的蓝色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线B0-LvαB0；
    S102、获取所述液晶面板的蓝色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线B0-LvβB0；
    S103、根据公式：
    Figure PCTCN2015088026-appb-100001
    分别计算所述液晶面板的蓝色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线B-LvαB和B-LvβB；
    S104、向每个蓝色子像素单元对中的第一蓝色子像素单元提供的较高灰阶 值BH与向每个蓝色子像素单元对中的第二蓝色子像素单元提供的较低灰阶值BL满足以下关系式：
    Δ1＝LvαB+LvαB-Lvα(BH)-Lvα(BL)；
    Δ2＝LvβB+LvβB-Lvβ(BH)-Lvβ(BL)；
    y1＝Δ12+Δ22；
    其中，y1取最小值，LvαB和LvβB的取值从关系曲线B-LvαB和B-LvβB查找取得，Lvα(BH)和Lvα(BL)的取值从关系曲线B0-LvαB0查找取得，Lvβ(BH)和Lvβ(BL)的取值从关系曲线B0-LvβB0查找取得；
    S105、对于每个蓝色子像素单元对，根据步骤S104，都获得相应的一个灰阶值BH与BL的组合，重新制定该液晶面板关于蓝色子像素单元的显示查找表。
  7. 如权利要求1所述的方法，其中，向每个绿色子像素单元对提供的较高灰阶值GH和较低灰阶值GL通过以下步骤来获得：
    S201、获取所述液晶面板的绿色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线G0-LvαG0；
    S202、获取所述液晶面板的绿色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线G0-LvβG0；
    S203、根据公式：
    Figure PCTCN2015088026-appb-100002
    分别计取所述液晶面板的绿色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线G-LvαG和G-LvβG；
    S204、向每个绿色子像素单元对中的第一绿色子像素单元提供的较高灰阶值GH与向每个绿色子像素单元对中的第二绿色子像素单元提供的较低灰阶值GL满足以下关系式：
    Δ1＝LvαG+LvαG-Lvα(GH)-Lvα(GL)；
    Δ2＝LvβG+LvβG-Lvβ(GH)-Lvβ(GL)；
    y2＝Δ12+Δ22；
    其中，y2取最小值，LvαG和LvβG的取值从关系曲线G-LvαG和G-LvβG查找取得，Lvα(GH)和Lvα(GL)的取值从关系曲线G0-LvαG0查找取得，Lvβ(GH)和Lvβ(GL)的取值从关系曲线G0-LvβG0查找取得；
    S205、对于每个绿色子像素单元对，根据步骤S204，都获得相应的一个灰阶值GH与GL的组合，重新制定该液晶面板关于绿色子像素单元的显示查找表。
  8. 根据权利要求1所述的方法，其中，向每个红色子像素单元对提供的较高灰阶值RH和较低灰阶值RL组合通过以下步骤来获得：
    S301、获取所述液晶面板的红色子像素单元在正视角度α下的实际亮度与灰阶值的关系曲线R0-LvαR0；
    S302、获取所述液晶面板的红色子像素单元在斜视角度β下的实际亮度与灰阶值的关系曲线R0-LvβR0；
    S303、根据公式：
    Figure PCTCN2015088026-appb-100003
    分别计算所述液晶面板的红色子像素单元在正视角度α和斜视角度β下的理论亮度与灰阶值的关系曲线R-LvαR和R-LvβR；
    S304、向每个红色子像素单元对中的第一红色子像素单元提供的较高灰阶值GH与向每个红色子像素单元对中的第二红色子像素单元提供的较低灰阶值RL满足以下关系式：
    Δ1＝LvαR-LvαR-Lvα(RH)-Lvα(RL)；
    Δ2＝LvβR-LvβR-Lvβ(RH)-Lvβ(RL)；
    y3＝Δ12+Δ22；
    其中，y3取最小值，LvαR和LvβR的取值从关系曲线R-LvαR和R-LvβR查找取得，Lvα(RH)和Lvα(RL)的取值从关系曲线R0-LvαR0查找取得，Lvβ(RH)和Lvβ(RL)的取值从关系曲线R0-LvβR0查找取得；
    S305、对于每个红色子像素单元对，根据步骤S304，都获得相应的一个灰阶值RH与RL的组合，重新制定该液晶面板关于红色子像素单元的显示查找表。
  9. 根据权利要求6所述的方法，其中，所述正视角度α为0°，所述斜视角度β为30～80°。
  10. 一种液晶面板，包括栅控制器、源控制器以及像素单元，所述栅控制器通过多条扫描线向所述像素单元提供扫描信号，所述源控制器通过多条数据线向所述像素单元提供数据信号，其特征在于，所述液晶面板的驱动方法采用 如权利要求1所述的驱动方法。
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