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WO2018120535A1 - 液晶显示器及其驱动方法 - Google Patents

液晶显示器及其驱动方法 Download PDF

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Publication number
WO2018120535A1
WO2018120535A1 PCT/CN2017/081664 CN2017081664W WO2018120535A1 WO 2018120535 A1 WO2018120535 A1 WO 2018120535A1 CN 2017081664 W CN2017081664 W CN 2017081664W WO 2018120535 A1 WO2018120535 A1 WO 2018120535A1
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Prior art keywords
liquid crystal
row
column
pixel
rectangular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/081664
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English (en)
French (fr)
Inventor
陈猷仁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Original Assignee
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HKC Co Ltd, Chongqing HKC Optoelectronics Technology Co Ltd filed Critical HKC Co Ltd
Priority to US16/314,488 priority Critical patent/US10825409B2/en
Publication of WO2018120535A1 publication Critical patent/WO2018120535A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3644—Control of matrices with row and column drivers using a passive matrix with the matrix divided into sections

Definitions

  • the present disclosure belongs to the field of display technology, and relates to, for example, a liquid crystal display and a driving method thereof.
  • LCDs liquid crystal displays
  • a liquid crystal panel, a backlight module, and a driving module for driving the liquid crystal panel and the backlight module are generally included, wherein the liquid crystal panel includes a color filter (CF) substrate and an array (Array) substrate disposed on the box, and A liquid crystal sandwiched between the two.
  • CF color filter
  • Array array
  • VA vertical aligned
  • each sub-pixel is often divided into a main sub-pixel and a sub sub-pixel, and different pixel voltages are supplied to the main sub-pixel and the sub-pixel.
  • a pixel design often requires the addition of metal traces and Thin Film Transistors (TFTs) to drive the primary and secondary sub-pixels, reducing the aperture ratio, and reducing the transmittance of the liquid crystal panel.
  • TFTs Thin Film Transistors
  • the light transmittance needs to increase the brightness of the light emitted by the backlight module, thereby increasing the cost of the backlight module.
  • the present disclosure provides a liquid crystal display and a driving method thereof that avoid low color shift phenomenon without affecting aperture ratio.
  • a liquid crystal display comprising: a liquid crystal panel and a driving circuit, wherein the liquid crystal panel comprises a plurality of liquid crystal pixels arranged in an array and the liquid crystal panel is arranged to display the same picture in two adjacent frames; the driving circuit Provided to respectively supply pixel voltages to each liquid crystal pixel in two adjacent frames to deflect liquid crystal molecules of each liquid crystal pixel, in each frame of two adjacent frames, each liquid crystal pixel The voltage value of the pixel voltage is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, and the pixel voltages of the same liquid crystal pixel have the same polarity and different voltage values in the previous frame and the subsequent frame.
  • the liquid crystal display further includes a backlight module, wherein the liquid crystal panel is divided into M ⁇ N rectangular panel partitions, and the backlight module is divided into M ⁇ N rectangular backlight partitions, and the i-th row is j
  • the rectangular panel partition of the column corresponds to the rectangular backlight partition of the i-th row and the j-th column, 1 ⁇ i ⁇ M, 1 ⁇ j ⁇ N; and in each frame of the adjacent two frames, in each rectangular panel partition
  • the driving circuit is also arranged to drive all of the rectangular backlight sections to simultaneously emit light.
  • the liquid crystal display further includes a backlight module, wherein the liquid crystal panel is divided into M ⁇ N rectangular panel partitions, and the backlight module is divided into M ⁇ N rectangular backlight partitions, and the i-th row is j
  • the rectangular panel partition of the column corresponds to the rectangular backlight partition of the i-th row and the j-th column, 1 ⁇ i ⁇ M, 1 ⁇ j ⁇ N; in each frame of the adjacent two frames, in the i-th row and the j-th column
  • the driving circuit is further arranged to drive the rectangular backlight partitions of the i-th row and the j-th column to emit light until all of the rectangular backlight sections are driven to emit light.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column and the brightness of the rectangular backlight partition of the i-th row and the j-th column satisfy:
  • L i,j_1 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of the adjacent two frames
  • V i,j_1 represents the i-th row and the j-th column of the previous frame of the adjacent two frames.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition, L i,j_2 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of the adjacent two frames, and V i,j_2 represents the adjacent two frames
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column and the brightness of the rectangular backlight partition of the i-th row and the j-th column satisfy:
  • L i,j represents the brightness of the rectangular backlight partition of the i-th row and the j-th column when the liquid crystal display is set to display the picture in only one frame
  • V i,j represents when the liquid crystal display is set to only The sum of the pixel voltages of all the liquid crystal pixels in all the rectangular panel partitions when the picture is displayed in one frame
  • L i,j_1 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of the adjacent two frames.
  • V i,j_1 represents the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the previous frame of the adjacent two frames
  • L i,j_2 represents the i-th in the subsequent frame of the adjacent two frames.
  • the luminance of the rectangular backlight partition of the jth column, and V i,j_2 represent the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column in the subsequent frame of the adjacent two frames.
  • a driving method of a liquid crystal display comprising a liquid crystal panel and a driving circuit, the liquid crystal panel comprising a plurality of liquid crystal pixels arranged in an array;
  • the driving method of the liquid crystal display includes:
  • the driving circuit supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel to deflect all liquid crystal molecules of each liquid crystal pixel, and the liquid crystal panel is set to be in phase Displaying the same picture in two adjacent frames;
  • the driving circuit supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel to deflect all liquid crystal molecules of each liquid crystal pixel;
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, in the previous frame and the latter one
  • the pixel voltages of the same liquid crystal pixel in the frame have the same polarity and different voltage values.
  • the liquid crystal display further includes a backlight module, the liquid crystal panel is divided into M ⁇ N rectangular panel partitions, and the backlight module is divided into M ⁇ N rectangular backlight partitions, and the i-th row and the j-th column are The rectangular panel partition corresponds to the rectangular backlight partition of the i-th row and the j-th column, 1 ⁇ i ⁇ M, 1 ⁇ j ⁇ N,;
  • the method further includes:
  • the driving circuit drives all the rectangular backlight partitions to simultaneously emit light
  • the driving circuit drives all of the rectangular backlight sections to simultaneously emit light.
  • the liquid crystal display further includes a backlight module, the liquid crystal panel is divided into M ⁇ N rectangular panel partitions, and the backlight module is divided into M ⁇ N rectangular backlight partitions, 1 ⁇ i ⁇ M,1 ⁇ j ⁇ N, the rectangular panel partition of the i-th row and the j-th column corresponds to the rectangular backlight partition of the i-th row and the j-th column;
  • the method further includes:
  • the driving circuit drives the rectangular backlight partition of the i-th row and the j-th column to exit.
  • Light is emitted until all of the rectangular backlight partitions are driven.
  • the driving circuit drives the rectangular backlight partition of the i-th row and the j-th column to exit. Light until all the rectangular backlight partitions are driven to emit light.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column and the brightness of the rectangular backlight partition of the i-th row and the j-th column satisfy:
  • L i,j_1 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of the adjacent two frames
  • V i,j_1 represents the i-th row and the j-th column of the previous frame of the adjacent two frames.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition, L i,j_2 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of the adjacent two frames, and V i,j_2 represents the adjacent two frames
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition of the i-th row and the j-th column and the brightness of the rectangular backlight partition of the i-th row and the j-th column satisfy:
  • L i,j_1 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of the adjacent two frames
  • V i,j_1 represents the i-th row and the j-th column of the previous frame of the adjacent two frames.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel partition, L i,j_2 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of the adjacent two frames, and V i,j_2 represents the adjacent two frames.
  • the brightness of the rectangular backlight partition of the jth column, and V i,j represents the sum of the pixel voltages of all the liquid crystal pixels in all the rectangular panel sections when the liquid crystal display is set to display the picture in only one frame.
  • L i,j_1 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the previous frame of the adjacent two frames
  • V i,j_1 represents the i-th row and the j-th column of the previous frame of the adjacent two frames.
  • L i,j_2 represents the brightness of the rectangular backlight partition of the i-th row and the j-th column in the subsequent frame of the adjacent two frames, and V i,j_2 represents the adjacent two frames.
  • the brightness of the rectangular backlight partition of column j, V i,j represents the sum of the pixel voltages of all liquid crystal pixels in all rectangular panel partitions when the liquid crystal display is set to display the picture in only one frame.
  • the present disclosure also provides a driving method of a liquid crystal display, the liquid crystal display comprising a liquid crystal panel and a driving circuit, the liquid crystal panel comprising a plurality of liquid crystal pixels arranged in an array;
  • the method includes:
  • the driving circuit supplies a first pixel voltage to the first liquid crystal pixel of the liquid crystal panel, and provides a second pixel voltage to the second liquid crystal pixel to make the liquid crystal of the first liquid crystal pixel Molecular deflection, the liquid crystal panel being arranged to display the same picture in two adjacent frames;
  • the driving circuit supplies a second pixel voltage to the first liquid crystal pixel of the liquid crystal panel, and provides a first pixel voltage to the second liquid crystal pixel to make the liquid crystal of the first liquid crystal pixel Molecular deflection
  • the first liquid crystal pixel is any liquid crystal pixel
  • the second liquid crystal pixel is an adjacent liquid crystal pixel of the first liquid crystal pixel
  • the first pixel voltage and the second voltage have the same polarity
  • the first pixel voltage and the second pixel voltage are stored in the driving circuit in the form of a look-up table, and the first pixel voltage and the second pixel voltage are previously based on the input red, green, and blue RGB signals. And the perspective of the need to compensate.
  • the voltage value of the pixel voltage of each liquid crystal pixel and the pixel voltage of the liquid crystal pixel adjacent thereto The voltage values are different.
  • the pixel voltages of the same liquid crystal pixel have the same polarity and different voltage values, so that the liquid crystal panel displays the same picture in two adjacent frames while achieving a low color shift angle.
  • each rectangular backlight partition is equal to the sum of the pixel voltages of all liquid crystal pixels in the corresponding rectangular panel partition, so that each rectangular panel partition is displayed in two adjacent frames. The same brightness, can eliminate flicker.
  • the angle-compensated liquid crystal panel displays twice the brightness of the picture in one frame, so that the brightness of the picture displayed by the liquid crystal panel is the same as the brightness of the picture displayed by the liquid crystal panel without the low color-off angle of view compensation.
  • FIG. 1 is a schematic structural view 1 of a liquid crystal display according to an embodiment
  • FIG. 2 is a second schematic structural view of a liquid crystal display according to an embodiment
  • FIG. 3 is a flow chart of a driving method of the liquid crystal display shown in FIG. 1;
  • FIG. 4 is a first flowchart of a driving method of the liquid crystal display shown in FIG. 2;
  • FIG. 5 is a second flowchart of the driving method of the liquid crystal display shown in FIG.
  • FIG. 1 is a schematic structural view of a liquid crystal display of the present embodiment.
  • the liquid crystal display of the present embodiment includes a liquid crystal panel 10, a driving module (which may also be referred to as a driving circuit) 20, and a backlight module 30.
  • the liquid crystal panel 10 may include a color filter (CF) substrate and an Array substrate provided to the cartridge, and a negatively-shaped vertically oriented (VA) liquid crystal interposed therebetween.
  • the liquid crystal panel 10 can be a liquid crystal panel having a VA display mode.
  • the liquid crystal panel 10 and the backlight module 30 may be disposed facing each other, and the two are combined and fixed by a fixing structure such as an outer frame.
  • the driving module 20 drives the backlight module 30 to emit light for use in the liquid crystal panel 10.
  • FIG. 1 the assembled state of the liquid crystal panel 10 and the backlight module 30 is not shown.
  • the liquid crystal panel 10 includes A ⁇ B liquid crystal pixels (i.e., sub-pixels) P 1,1 , P 1,2 , ..., P A, B , where ⁇ is a multiplication operator.
  • the liquid crystal pixels P a,b (where 1 ⁇ a ⁇ A, 1 ⁇ b ⁇ B, and a and b are integers) may be red liquid crystal pixels, green liquid crystal pixels or blue liquid crystal pixels.
  • at least one red liquid crystal pixel, at least one green liquid crystal pixel, and at least one blue liquid crystal pixel may be included in the liquid crystal pixels P 1,1 , P 1,2 , . . . , P A,B .
  • liquid crystal pixels of the same color are in the column direction (vertical direction in FIG. 1), and red liquid crystal pixels, green liquid crystal pixels, and blue are in the row direction (horizontal direction in FIG. 1).
  • the color liquid crystal pixels are arranged in a group order.
  • each liquid crystal pixel is no longer divided into a primary sub-pixel and a sub-pixel.
  • the technical solution adopted in this embodiment may be: setting the liquid crystal panel 10 to display the same picture in two adjacent frames; and driving the module 20 in two adjacent frames.
  • a pixel voltage is supplied to each of the liquid crystal pixels, respectively, to deflect liquid crystal molecules of each liquid crystal pixel.
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, and is the same in the previous frame and the subsequent frame.
  • the pixel voltage of one liquid crystal pixel has the same polarity and a different voltage value.
  • the frame refresh frequency of the liquid crystal panel 10 is doubled.
  • the frame refresh frequency of the liquid crystal panel 10 is increased from the original 60 Hz to 120 Hz.
  • the driving module 20 supplies a high pixel voltage (or a low pixel voltage) to the liquid crystal pixels P a, b to deflect and drive the liquid crystal molecules of the liquid crystal pixels P a, b .
  • the module 20 provides low to the liquid crystal pixels P (a-1), b , the liquid crystal pixels P a, (b-1) , the liquid crystal pixels P a, (b+1), and the liquid crystal pixels P (a+1), b Pixel voltage (or high pixel voltage).
  • the driving module 20 supplies a low pixel voltage (or a high pixel voltage) to the liquid crystal pixels P a, b to deflect the liquid crystal molecules of the liquid crystal pixels P a, b , and drive the module 20 toward the liquid crystal.
  • Pixels P (a-1), b , liquid crystal pixels P a, (b-1) , liquid crystal pixels P a, (b+1), and liquid crystal pixels P (a+1), b each provide a high pixel voltage (or Low pixel voltage).
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto.
  • Each of the liquid crystal pixels has a different voltage value of the pixel voltage supplied in the adjacent two frames, and the polarity of the pixel voltage is the same, and the liquid crystal panel 10 can display the same picture in the adjacent two frames.
  • the high pixel voltage and the low pixel voltage are determined according to an input RGB (Red, Green, Blue) signal and are compensated according to the need, and may be in the form of a Look-Up-Table (LUT). Recorded in the drive module 10. For example, taking an 8-bit (bit) drive signal as an example, the R signal, the G signal, and the B signal in the input RGB signal respectively correspond to 256 pairs of pixel voltage pairs (high pixel voltage and low pixel voltage are a pair), and a total of 3 * 256 high pixel voltages and 3 * 256 low pixel voltages, where * is the multiplication operator.
  • RGB Red, Green, Blue
  • the voltage values of the pixels of different liquid crystal pixels are respectively supplied to the liquid crystal pixels in the adjacent two frames, and the voltage values of the pixel voltages of each liquid crystal pixel are in each frame of the adjacent two frames.
  • the voltage value of the pixel voltage of the adjacent liquid crystal pixel is different, when the liquid crystal panel 10 displays the same screen in two adjacent frames, low color shift angle compensation can be achieved, that is, when the liquid crystal panel 10 is viewed in a large viewing angle direction, A color shift will occur.
  • the backlight module 30 is optionally divided into brightness regions, and the brightness of each brightness region is dynamically adjusted.
  • the display brightness of each liquid crystal pixel of the liquid crystal panel 10 is made uniform, and the flicker phenomenon is eliminated.
  • FIG. 2 is a schematic structural view of a liquid crystal display of the present embodiment. The differences between the embodiment shown in Fig. 2 and the embodiment shown in Fig. 1 will be described below.
  • the liquid crystal panel 10 is divided into M ⁇ N rectangular panel sections 10 1,1 , 10 1,2 , . 10 M, N , and dividing the backlight module 30 into M ⁇ N rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M,N , wherein the rectangular panel partition 10 i,j and the rectangular backlight partition 30 i, j corresponds, 1 ⁇ i ⁇ M, 1 ⁇ j ⁇ N, and i and j are integers.
  • the number of liquid crystal pixels included in each rectangular panel partition may be the same or different.
  • L i, j_1 denote the previous two frames in adjacent rectangular panel partition 10 i, j of luminance, V i, j_1 showing adjacent panels prior to a rectangular two partitions 10 i, j of all the liquid crystal
  • L i,j_2 represents the brightness of the rectangular backlight partitions 30 i,j in the subsequent frame of the adjacent two frames
  • V i,j_2 represents the rectangular backlight partition 30 i in the subsequent frame of the adjacent two frames , the sum of the pixel voltages of all liquid crystal pixels in j .
  • the product of the light transmittance of the liquid crystal pixel and the backlight brightness is the display brightness of the liquid crystal pixel
  • the product of the pixel voltage of the liquid crystal pixel and the backlight brightness can represent the liquid crystal.
  • the display brightness of the pixel When two adjacent longitudinal rectangular backlight partition 30 i, j and the luminance of the rectangular partition panel 10 i, j are equal for all the pixel voltage and the product of the liquid crystal pixels, the rectangular panel partition 10 i, j adjacent longitudinal The display brightness in both frames is the same, which eliminates flicker.
  • the manner in which the backlight module 30 provides the display light to the liquid crystal panel 10 may include the following two modes.
  • the driving module 20 drives all of the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M, N to simultaneously emit light.
  • the brightness of each rectangular backlight partition may be different or the same, and the brightness of each rectangular backlight partition may be regulated by the driving module 20.
  • the driving module 20 is driven.
  • the rectangular backlight partitions 30 i, j are driven to emit light until all of the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M,N are emitted.
  • the drive module 20 drives each rectangular backlight partition in a time division manner.
  • the brightness of the plurality of rectangular backlight partitions may be different or the same, and the brightness of each rectangular backlight partition may be regulated by the driving module 20.
  • each rectangular panel of the liquid crystal panel 10 is partitioned and displayed in two adjacent frames.
  • the sum of the brightness of the same picture is that the liquid crystal panel that does not perform low color shift viewing angle compensation displays twice the brightness of the picture in one frame. .
  • L i,j represents the brightness of the corresponding rectangular backlight partition when the liquid crystal panel without the low color shift angle compensation is set to display the picture in only one frame
  • V i,j indicates that the low color shift angle is not performed.
  • the compensated liquid crystal panel is set to the sum of the pixel voltages of all the liquid crystal pixels in the corresponding rectangular panel partition when the picture is displayed in only one frame.
  • a liquid crystal panel that does not perform low color shift viewing angle compensation displays a different picture in different frames.
  • FIG. 3 is a flow chart showing a driving method of the liquid crystal display shown in FIG. 1.
  • the driving method of the liquid crystal display of the present embodiment includes the following steps.
  • step 310 in a previous frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • step 320 in a subsequent frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, and is the same in the previous frame and the subsequent frame.
  • the pixel voltages of the liquid crystal pixels have the same polarity and different voltage values.
  • FIG. 4 is a first flowchart of a driving method of the liquid crystal display shown in FIG. 2.
  • the driving method of the liquid crystal display of the present embodiment includes the following steps.
  • step 410 in a previous frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • step 420 after the liquid crystal molecules of the liquid crystal pixels in the rectangular panel sections 10 1,1 , 10 1,2 , . . . , 10 M,N of the liquid crystal panel 10 are deflected in the previous frame of the adjacent two frames
  • the driving module 20 drives all the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M, N to simultaneously emit light.
  • step 430 in a subsequent frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • step 440 the liquid crystal molecules of the liquid crystal pixels in all rectangular panel sections 10 1,1 , 10 1,2 , . . . , 10 M,N of the liquid crystal panel 10 are deflected in the next frame of the adjacent two frames.
  • the drive module 20 drives all of the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M, N to simultaneously emit light.
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, and is the same in the previous frame and the subsequent frame.
  • the pixel voltages of the liquid crystal pixels have the same polarity and different voltage values.
  • FIG. 5 is a second flowchart of the driving method of the liquid crystal display shown in FIG.
  • the driving method of the liquid crystal display of the present embodiment includes the following steps.
  • step 510 in a previous frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • step 520 after the liquid crystal molecules of all the liquid crystal pixels in the rectangular panel section 10 i,j of the liquid crystal panel 10 are deflected in the previous frame of the adjacent two frames, the driving module 20 drives the rectangular backlight partition 30 i,j The light is emitted until all of the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M,N are emitted.
  • step 530 in a subsequent frame of two adjacent frames, the driving module 20 supplies a pixel voltage to each liquid crystal pixel of the liquid crystal panel 10 to deflect all liquid crystal molecules of each liquid crystal pixel.
  • step 540 after the liquid crystal molecules of all the liquid crystal pixels in the rectangular panel section 10 i,j of the liquid crystal panel 10 are deflected in the next frame of the adjacent two frames, the driving module 20 drives the rectangular backlight partition 30 i,j The light is emitted until all of the rectangular backlight partitions 30 1,1 , 30 1,2 , . . . , 30 M,N are emitted.
  • the voltage value of the pixel voltage of each liquid crystal pixel is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, and in the previous frame and the latter one
  • the pixel voltages of the same liquid crystal pixel in the frame have the same polarity and different voltage values.
  • the sum of the pixel voltages of all the liquid crystal pixels in the rectangular panel section 10 i, j and the brightness of the rectangular backlight partition 30 i, j satisfy the above formula. At least one of 1 and 2.
  • each liquid crystal pixel by providing each liquid crystal pixel with a voltage pulse of the same polarity having different voltage values in two adjacent frames, and in each frame of two adjacent frames, the voltage of the pixel voltage of each liquid crystal pixel The value is different from the voltage value of the pixel voltage of the liquid crystal pixel adjacent thereto, so that when the liquid crystal panel displays the same picture in two adjacent frames, low color-off-angle compensation can be achieved, that is, when the liquid crystal panel is viewed in a large viewing angle direction, There is no color shift phenomenon, and the liquid crystal pixels are not divided into primary and secondary pixels and sub-pixels, and it is not necessary to add metal traces and thin film transistors to drive the primary and secondary sub-pixels, and the aperture ratio is not reduced.
  • the brightness of each rectangular backlight partition is equal to the sum of the pixel voltages of all the liquid crystal pixels in the corresponding rectangular panel partition, so that each rectangular panel can be partitioned in two adjacent frames.
  • the display brightness is the same, which can eliminate flicker.
  • the sum of the brightness of the same picture displayed in each of the adjacent two frames of the rectangular panel of the liquid crystal panel is twice the brightness of the picture displayed in a frame without the low color shift angle compensation, so that the liquid crystal
  • the brightness of the screen displayed on the panel is the same as the brightness of the screen displayed on the liquid crystal panel without the low color shift angle compensation.
  • the liquid crystal display and the driving method thereof provided by the present disclosure can eliminate the phenomenon of large-view character deviation.

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Abstract

公开了一种液晶显示器及其驱动方法，其中液晶显示器包括液晶面板（10）和驱动模块（20），液晶面板（10）包括阵列排布的多个液晶像素，液晶显示器被设置为在相邻两帧中显示同一画面；驱动模块（20）用于在相邻两帧中分别向每个液晶像素提供高低不同的同极性像素电压，以使每个液晶像素的液晶分子偏转；其中在相邻两帧的每一帧中，每个液晶像素的像素电压的高低都与其上下左右相邻的液晶像素的像素电压的高低不同。

Description

液晶显示器及其驱动方法 技术领域
本公开属于显示技术领域，例如，涉及一种液晶显示器及其驱动方法。
背景技术
光电技术与半导体技术的演进也带动了平板显示器(Flat Panel Display)的蓬勃发展，而在诸多平板显示器中，液晶显示器(Liquid Crystal Display，LCD)因具有高空间利用效率、低消耗功率、无辐射以及低电磁干扰等诸多优越特性，已被应用于生产生活的多个方面。
在液晶显示器中，通常包括液晶面板、背光模块以及驱动液晶面板和背光模块的驱动模块，其中液晶面板包括对盒设置的彩色滤光片(Color Filter，CF)基板和阵列(Array)基板，以及夹设于二者之间的液晶。在大尺寸液晶面板中，较多采用负型垂直取向(Vertically Aligned，VA)液晶，然而负型VA液晶存在较多的缺陷，尤其是需要呈现较大的视角时，在大视角观看负型VA型液晶的液晶面板时，会出现色偏现象。
为了解决上述缺陷，在采用负型VA型液晶的液晶面板中往往将每个子像素分为主(Main)次像素和子(Sub)次像素，并向主次像素和子次像素提供不同的像素电压。但是，这样的像素设计往往需要再增加金属走线和薄膜晶体管(Thin Film Transistor，TFT)来驱动主次像素和子次像素，降低了开口率，使液晶面板的透光率下降，为了维持原有的透光率，就需要提升背光模块出射的光线亮度，从而提升了背光模块的成本。
发明内容
本公开提供了一种避免低色偏现象又不影响开口率的液晶显示器及其驱动方法。
第一方面，提供了一种液晶显示器，包括：液晶面板和驱动电路，其中，液晶面板包括多个阵列排布的液晶像素且液晶面板被设置为在相邻两帧中显示同一画面；驱动电路设置为在相邻两帧中分别向每个液晶像素提供像素电压，以使每个液晶像素的液晶分子偏转，在相邻两帧的每一帧中，每个液晶像素的 像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，以及在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
可选地，所述液晶显示器还包括背光模块，其中，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；以及在相邻两帧的每一帧中，在每个矩形面板分区中的所有液晶像素的液晶分子偏转之后，所述驱动电路还设置为驱动所有的矩形背光分区同时出射光线。
可选的，所述液晶显示器还包括背光模块，其中，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；在相邻两帧的每一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路还设置为驱动第i行第j列的矩形背光分区出射光线，直至驱动所有的矩形背光分区出射光线。
可选地，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
其中，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
可选地，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
其中，Li，j表示当所述液晶显示器被设置为仅在一帧中显示画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一 帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
第二方面，还提供了一种液晶显示器的驱动方法，所述液晶显示器包括液晶面板和驱动电路，所述液晶面板包括多个阵列排布的液晶像素；
所述液晶显示器的驱动方法包括：
在相邻两帧的前一帧中，所述驱动电路向所述液晶面板的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转，所述液晶面板被设置为在相邻两帧中显示同一画面；以及
在相邻两帧的后一帧中，所述驱动电路向所述液晶面板的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转；
其中，在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，在所述前一帧和所述后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
可选地，所述液晶显示器还包括背光模块，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N，；
所述方法还包括：
在相邻两帧的前一帧中，在每个矩形面板分区中的所有液晶像素的液晶分子偏转之后，所述驱动电路驱动所有的矩形背光分区同时出射光线；以及
在相邻两帧的后一帧中，在每个矩形面板分区中的所有液晶像素的液晶分子偏转之后，所述驱动电路驱动所有的矩形背光分区同时出射光线。
可选地，所述液晶显示器还包括背光模块，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，1≤i≤M，1≤j≤N，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应；
所述方法还包括：
在相邻两帧的前一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路驱动第i行第j列的矩形背光分区出射光线， 直至驱动所有的矩形背光分区出射光线。
在相邻两帧的后一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路驱动第i行第j列的矩形背光分区出射光线，直至驱动所有的矩形背光分区出射光线。
可选地，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
其中，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
可选的，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
其中，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，以及Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和。
第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，和
Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
其中，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度， Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和；Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和。
本公开还提供一种液晶显示器的驱动方法，所述液晶显示器包括液晶面板和驱动电路，所述液晶面板包括多个阵列排布的液晶像素；
所述方法包括：
在相邻两帧的前一帧中，所述驱动电路向所述液晶面板的第一液晶像素提供第一像素电压，向第二液晶像素提供第二像素电压，以使第一液晶像素的液晶分子偏转，所述液晶面板被设置为在相邻两帧中显示同一画面；以及
在相邻两帧的后一帧中，所述驱动电路向所述液晶面板的第一液晶像素提供第二像素电压，向第二液晶像素提供第一像素电压，以使第一液晶像素的液晶分子偏转；
其中，所述第一液晶像素为任一液晶像素，所述第二液晶像素为所述第一液晶像素的相邻液晶像素，所述第一像素电压和所述第二电压的极性相同且电压值不同，所述第一像素电压和所述第二像素电压以查找表的形式存储于驱动电路中，所述第一像素电压和所述第二像素电压预先根据输入的红绿蓝RGB信号以及需要补偿的视角确定。
通过在相邻两帧中分别向每个液晶像素提供像素电压，且在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同，使液晶面板在相邻两帧中显示同一画面的同时，实现低色偏视角补偿，即在大视角方向观看液晶面板时，不会出现色偏现象，而且液晶像素未划分主次像素和子次像素，不需要增加金属走线和薄膜晶体管来驱动主次像素和子次像素，不会减小开口率。在相邻的前后两帧中，使每个矩形背光分区的亮度与对应的矩形面板分区中所有液晶像素的像素电压之和的乘积相等，使每个矩形面板分区在相邻两帧中的显示亮度相同，能够消除闪烁现象。液晶面板的每个矩形面板分区在相邻两帧中显示的同一画面的亮度之和为未做低色偏视 角补偿的液晶面板在一帧中显示所述画面的亮度的两倍，使液晶面板显示的画面的亮度与未做低色偏视角补偿的液晶面板显示的画面的亮度相同。
附图说明
通过结合附图进行的以下描述，使得实施例的特征将变得更加清楚，附图中：
图1是一实施例的液晶显示器的结构示意图一；
图2是一实施例的液晶显示器的结构示意图二；
图3是图1所示的液晶显示器的驱动方法的流程图；
图4是图2所示的液晶显示器的驱动方法的流程图一；以及
图5是图2所示的液晶显示器的驱动方法的流程图二。
具体实施方式
将参照附图来详细描述以下实施例。在不冲突的情况下，以下实施例以及实施例中的特征可以任意相互组合。
图1是本实施例的液晶显示器的结构示意图。
参照图1，本的实施例的液晶显示器包括：液晶面板10、驱动模块(也可称为驱动电路)20和背光模块30。
液晶面板10可以包括对盒设置的彩色滤光片(Color Filter，CF)基板和阵列(Array)基板，以及夹设于二者之间的负型垂直取向(Vertically Aligned，VA)液晶。液晶面板10可以为一具有VA显示模式的液晶面板。
在组装形成液晶显示器的过程中，可以将液晶面板10和背光模块30面对设置，借由外框等固定结构将二者结合固定。驱动模块20驱动背光模块30出射光线，以提供给液晶面板10所用。在图1中，未示出液晶面板10和背光模块30的组装状态。
液晶面板10包括A×B个液晶像素(即子像素)P1，1、P1，2、……、PA，B，其中×为乘法运算符。液晶像素Pa，b(其中1≤a≤A，1≤b≤B，且a和b均为整数)可以是红色液晶像素、绿色液晶像素或蓝色液晶像素。而且液晶像素P1，1、 P1，2、……、PA，B中可以包括至少一个红色液晶像素、至少一个绿色液晶像素和至少一个蓝色液晶像素。作为一种可选方案，在列方向(图1中的竖直方向)上均为同一颜色的液晶像素，在行方向(图1中的水平方向)上以红色液晶像素、绿色液晶像素和蓝色液晶像素为组顺序排列。
在本实施例的液晶面板10中，不再将每个液晶像素分为主次像素和子次像素。为了使大视角观看液晶面板10时不出现色偏现象，本实施例采取的技术方案可以为：将液晶面板10设置为在相邻两帧中显示同一画面；驱动模块20在相邻两帧中分别向每个液晶像素提供像素电压，以使每个液晶像素的液晶分子偏转。其中，在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，以及在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
液晶面板10的帧刷新频率被提高了一倍，例如液晶面板10的帧刷新频率由原来的60Hz提升为120Hz。
参照图1，在相邻两帧的前一帧中，驱动模块20向液晶像素Pa，b提供高像素电压(或低像素电压)，以使液晶像素Pa，b的液晶分子偏转，驱动模块20向液晶像素P(a-1)，b、液晶像素Pa，(b-1)、液晶像素Pa，(b+1)以及液晶像素P(a+1)，b均提供了低像素电压(或高像素电压)。
在相邻两帧的后一帧中，驱动模块20向液晶像素Pa，b提供低像素电压(或高像素电压)，以使液晶像素Pa，b的液晶分子偏转，驱动模块20向液晶像素P(a-1)，b、液晶像素Pa，(b-1)、液晶像素Pa，(b+1)以及液晶像素P(a+1)，b均提供了高像素电压(或低像素电压)。
每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同。每个液晶像素在相邻的前后两帧中被提供的像素电压的电压值不同，以及像素电压的极性相同，液晶面板10在相邻的前后两帧中能够显示同一画面。
所述高像素电压和所述低像素电压为事先已经根据输入的RGB(Red，Green，Blue)信号且按照需要补偿的视角所决定，可以以查找表(Look-Up-Table，LUT)的方式记录在驱动模块10中。例如，以8比特(bit)的驱动信号为例，输入的RGB信号中的R信号、G信号和B信号分别对应256对像素电压对(高像素电压和低像素电压为一对)，共有3*256个高像素电压和3*256个低像素电压，其中，*为乘法运算符。
综上，通过在相邻两帧中分别向每个液晶像素提供电压值不同的同极性像素电压，且在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，使液晶面板10在相邻两帧中显示同一画面时，能够实现低色偏视角补偿，即在大视角方向观看液晶面板10时，不会出现色偏现象。
为了克服相邻两帧中液晶面板10的每个液晶像素显示的亮度不平均而造成的闪烁现象，可选地，对背光模块30进行亮度区域的划分，通过动态调节每个亮度区域的亮度，使液晶面板10的每个液晶像素显示亮度均匀，消除闪烁现象，请参照图2所示的液晶显示器。图2是本实施例的液晶显示器的结构示意图。以下对图2所示的实施例与图1所示的实施例的不同之处进行说明。
参照图2，与图1所示的实施例不同的是，图2中的液晶显示器中，将液晶面板10划分为M×N个矩形面板分区101，1、101，2、……、10M，N，且将背光模块30划分为M×N个矩形背光分区301，1、301，2、……、30M，N，其中矩形面板分区10i，j与矩形背光分区30i，j相对应，1≤i≤M，1≤j≤N，且i和j均为整数。每个矩形面板分区中包括的液晶像素的数量可以相同，也可以不同。
矩形面板分区10i，j中所有液晶像素的像素电压之和与矩形背光分区30i，j的亮度满足下面的式子1。
[式子1]Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2
其中，Li，j_1表示相邻两帧的前一帧中矩形面板分区10i，j的亮度，Vi，j_1表示相邻两帧的前一帧中矩形面板分区10i，j中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中矩形背光分区30i，j的亮度，Vi，j_2表示相邻两帧的后一帧中矩形背光分区30i，j中所有液晶像素的像素电压之和。
由于液晶像素的像素电压与液晶像素的光线穿透率成正比，液晶像素的光线穿透率与背光亮度的乘积即为液晶像素的显示亮度，液晶像素的像素电压与背光亮度的乘积能够表示液晶像素的显示亮度。当相邻的前后两帧中矩形背光分区30i，j的亮度与矩形面板分区10i，j中所有液晶像素的像素电压之和的乘积相等时，矩形面板分区10i，j在相邻前后两帧中的显示亮度就相同，能够消除闪烁现象。
在液晶面板10和背光模块30均被划分区域后，关于背光模块30向液晶面板10提供显示光线的方式可以包括以下两种方式。
背光模块30向液晶面板10提供显示光线的第一种方式中，在相邻两帧的每一帧中，在所有的矩形面板分区101，1、101，2、……、10M，N中的所有液晶像素的液晶分子偏转之后，驱动模块20驱动所有的矩形背光分区301，1、301，2、……、30M，N同时出射光线。每个矩形背光分区的亮度可以不同，也可以相同，每个矩形背光分区的亮度可由驱动模块20调控。
背光模块30向液晶面板10提供显示光线的第二种方式中，在相邻两帧的每一帧中，在矩形面板分区10i，j中的所有液晶像素的液晶分子偏转之后，驱动模块20驱动矩形背光分区30i，j出射光线，直至驱动所有的矩形背光分区301，1、301，2、……、30M，N出射光线。驱动模块20分时驱动每个矩形背光分区。多个矩形背光分区的亮度可以不同，也可以相同，每个矩形背光分区的亮度可由驱动模块20调控。
为了使液晶面板10显示的画面的亮度与未做低色偏视角补偿的液晶面板显示的画面的亮度相同，可选地，使液晶面板10的每个矩形面板分区在相邻两帧中显示的同一画面的亮度之和为未做低色偏视角补偿的液晶面板在一帧中显示所述画面的亮度的两倍。。
矩形面板分区10i，j中所有液晶像素的像素电压之和与矩形背光分区30i，j的亮度满足下面的式子2。
[式子2]Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j
其中，Li，j表示当未做低色偏视角补偿的液晶面板被设置为仅在一帧中显示所述画面时相应矩形背光分区的亮度，Vi，j表示当未做低色偏视角补偿的液晶面板被设置为仅在一帧中显示所述画面时相应矩形面板分区中所有液晶像素的像素电压之和。未做低色偏视角补偿的液晶面板在不同帧中显示的画面不相同。
以下对液晶显示器的驱动方法进行说明。图3是图1所示的液晶显示器的驱动方法的流程图。
参照图1和图3，本实施例的液晶显示器的驱动方法包括以下步骤。
在步骤310中，在相邻两帧的前一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
在步骤320中，在相邻两帧的后一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
其中，在前一帧和后一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，且在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
图4是图2所示的液晶显示器的驱动方法的流程图一。
参照图2和图4，本实施例的液晶显示器的驱动方法包括以下步骤。
在步骤410中，在相邻两帧的前一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
在步骤420中，在相邻两帧的前一帧中，在液晶面板10的矩形面板分区101，1、101，2、……、10M，N中的液晶像素的液晶分子偏转之后，驱动模块20驱动所有的矩形背光分区301，1、301，2、……、30M，N同时出射光线。
在步骤430中，在相邻两帧的后一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
在步骤440中，在相邻两帧的后一帧中，在液晶面板10的所有矩形面板分区101，1、101，2、……、10M，N中的液晶像素的液晶分子偏转之后，驱动模块20驱动所有的矩形背光分区301，1、301，2、……、30M，N同时出射光线。
其中，在前一帧和后一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，且在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
图5是图2所示的液晶显示器的驱动方法的流程图二。
参照图2和图5，本实施例的液晶显示器的驱动方法包括以下步骤。
在步骤510中，在相邻两帧的前一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
在步骤520中，在相邻两帧的前一帧中，在液晶面板10的矩形面板分区10i，j中的所有液晶像素的液晶分子偏转之后，驱动模块20驱动矩形背光分区30i，j出射光线，直至驱动所有的矩形背光分区301，1、301，2、……、30M，N出射光线。
在步骤530中，在相邻两帧的后一帧中，驱动模块20向液晶面板10的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转。
在步骤540中，在相邻两帧的后一帧中，在液晶面板10的矩形面板分区10i，j 中的所有液晶像素的液晶分子偏转之后，驱动模块20驱动矩形背光分区30i，j出射光线，直至驱动所有的矩形背光分区301，1、301，2、……、30M，N出射光线。
其中，在前一帧和后一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，且在所述前一帧和所述后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
此外，可选地，在图4和图5所示的驱动方法中，矩形面板分区10i，j中所有液晶像素的像素电压之和与矩形背光分区30i，j的亮度满足上面的式子1和式子2中的至少一个。
综上所述，通过在相邻两帧中分别向每个液晶像素提供电压值不同的同极性像素电压，且在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，使液晶面板在相邻两帧中显示同一画面的时，能够实现低色偏视角补偿，即在大视角方向观看液晶面板时，不会出现色偏现象，而且液晶像素未划分主次像素和子次像素，不需要增加金属走线和薄膜晶体管来驱动主次像素和子次像素，不会减小开口率。在相邻的前后两帧中，使每个矩形背光分区的亮度与对应的矩形面板分区中所有液晶像素的像素电压之和的乘积相等，可以使每个矩形面板分区在相邻两帧中的显示亮度相同，能够消除闪烁现象。使液晶面板的每个矩形面板分区在相邻两帧中显示的同一画面的亮度之和为未做低色偏视角补偿的液晶面板在一帧中显示所述画面的亮度的两倍，使液晶面板显示的画面的亮度与未做低色偏视角补偿的液晶面板显示的画面的亮度相同。
工业实用性
本公开提供的液晶显示器及其驱动方法，能够消除大视角色偏现象。

Claims (20)

  1. 一种液晶显示器，包括：液晶面板和驱动电路，其中，
    所述液晶面板包括多个阵列排布的液晶像素且所述液晶面板被设置为在相邻两帧中显示同一画面；
    所述驱动电路设置为在相邻两帧中分别向每个液晶像素提供像素电压，以使每个液晶像素的液晶分子偏转；以及
    在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，在前一帧和后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
  2. 根据权利要求1所述的液晶显示器，还包括背光模块，其中，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；以及
    在相邻两帧的每一帧中，在每个矩形面板分区中的所有液晶像素的液晶分子偏转之后，所述驱动电路还设置为驱动所有的矩形背光分区同时出射光线。
  3. 根据权利要求1所述的液晶显示器，其中，还包括背光模块，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；
    在相邻两帧的每一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路还设置为驱动第i行第j列的矩形背光分区出射光线，直至驱动所有的矩形背光分区出射光线。
  4. 根据权利要求2所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  5. 根据权利要求3所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  6. 根据权利要求2所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j表示当所述液晶显示器被设置为仅在一帧中显示画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及 Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  7. 根据权利要求3所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j表示当所述液晶显示器被设置为仅在一帧中显示画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和；Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  8. 根据权利要求4所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，Li，j表示当所述液晶显示器被设置为仅在一帧中显示画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时矩形面板分区中所有液晶像素的像素电压之和。
  9. 根据权利要求5所述的液晶显示器，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，Li，j表示当所述液晶显示器被设置为仅在一帧中显示画面时第i行第j 列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时矩形面板分区中所有液晶像素的像素电压之和。
  10. 根据权利要求1所述的液晶显示器，其中，所述多个液晶像素包括至少一个红色液晶像素、至少一个绿色液晶像素和至少一个蓝色液晶像素。
  11. 一种液晶显示器的驱动方法，其中，所述液晶显示器包括液晶面板和驱动电路，所述液晶面板包括多个阵列排布的液晶像素；
    所述方法包括：
    在相邻两帧的前一帧中，所述驱动电路向所述液晶面板的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转，所述液晶面板被设置为在相邻两帧中显示同一画面；以及
    在相邻两帧的后一帧中，所述驱动电路向所述液晶面板的每个液晶像素提供像素电压，以使每个液晶像素的所有液晶分子偏转；
    其中，在相邻两帧的每一帧中，每个液晶像素的像素电压的电压值与和其相邻的液晶像素的像素电压的电压值不同，在所述前一帧和所述后一帧中同一个液晶像素的像素电压的极性相同且电压值不同。
  12. 根据权利要求11所述的方法，其中，所述液晶显示器还包括背光模块，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；
    所述方法还包括：
    在相邻两帧的前一帧中，在每个矩形面板分区中的所有液晶像素的液晶分子偏转之后，所述驱动电路驱动所有的矩形背光分区同时出射光线；以及
    在相邻两帧的后一帧中，在每个矩形面板分区中的所有液晶像素的液晶分 子偏转之后，所述驱动电路驱动所有的矩形背光分区同时出射光线。
  13. 根据权利要求11所述的方法，其中，所述液晶显示器还包括背光模块，所述液晶面板被划分为M×N个矩形面板分区，所述背光模块被划分为M×N个矩形背光分区，第i行第j列的矩形面板分区与第i行第j列的矩形背光分区相对应，1≤i≤M，1≤j≤N；
    所述方法还包括：
    在相邻两帧的前一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路驱动第i行第j列的矩形背光分区出射光线，直至驱动所有的矩形背光分区出射光线；以及
    在相邻两帧的后一帧中，在第i行第j列的矩形面板分区中的每个液晶像素的液晶分子偏转之后，所述驱动电路驱动第i行第j列的矩形背光分区出射光线，直至驱动所有的矩形背光分区出射光线。
  14. 根据权利要求12所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  15. 根据权利要求12所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，以及Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和。
  16. 根据权利要求12所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，和
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和；Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和。
  17. 根据权利要求13所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，以及Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和。
  18. 根据权利要求13所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，以及Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时所有矩形面板分区中所有液晶像素的像素电压之和。
  19. 根据权利要求13所述的方法，其中，第i行第j列的矩形面板分区中所有液晶像素的像素电压之和与第i行第j列的矩形背光分区的亮度满足：
    Li，j_1*Vi，j_1＝Li，j_2*Vi，j_2，以及
    Li，j_1*Vi，j_1+Li，j_2*Vi，j_2＝2*Li，j*Vi，j，
    其中，*为乘法运算符，Li，j_1表示相邻两帧的前一帧中第i行第j列的矩形背光分区的亮度，Vi，j_1表示相邻两帧的前一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j_2表示相邻两帧的后一帧中第i行第j列的矩 形背光分区的亮度，Vi，j_2表示相邻两帧的后一帧中第i行第j列的矩形面板分区中所有液晶像素的像素电压之和，Li，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时第i行第j列的矩形背光分区的亮度，以及Vi，j表示当所述液晶显示器被设置为仅在一帧中显示所述画面时矩形面板分区中所有液晶像素的像素电压之和。
  20. 一种液晶显示器的驱动方法，其中，所述液晶显示器包括液晶面板和驱动电路，所述液晶面板包括多个阵列排布的液晶像素；
    所述方法包括：
    在相邻两帧的前一帧中，所述驱动电路向所述液晶面板的第一液晶像素提供第一像素电压，向第二液晶像素提供第二像素电压，以使第一液晶像素的液晶分子偏转，所述液晶面板被设置为在相邻两帧中显示同一画面；以及
    在相邻两帧的后一帧中，所述驱动电路向所述液晶面板的第一液晶像素提供第二像素电压，向第二液晶像素提供第一像素电压，以使第一液晶像素的液晶分子偏转；
    其中，所述第一液晶像素为任一液晶像素，所述第二液晶像素为所述第一液晶像素的相邻液晶像素，所述第一像素电压和所述第二电压的极性相同且电压值不同，所述第一像素电压和所述第二像素电压以查找表的形式存储于驱动电路中，所述第一像素电压和所述第二像素电压预先根据输入的红绿蓝RGB信号以及需要补偿的视角确定。
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