WO2022032780A1 - 显示面板的视角补偿方法及显示面板 - Google Patents

显示面板的视角补偿方法及显示面板 Download PDF

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Publication number
WO2022032780A1
WO2022032780A1 PCT/CN2020/113991 CN2020113991W WO2022032780A1 WO 2022032780 A1 WO2022032780 A1 WO 2022032780A1 CN 2020113991 W CN2020113991 W CN 2020113991W WO 2022032780 A1 WO2022032780 A1 WO 2022032780A1
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Prior art keywords
type
grayscale
pixel unit
frame
display panel
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PCT/CN2020/113991
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English (en)
French (fr)
Inventor
何振伟
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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Priority to US16/972,701 priority Critical patent/US11721299B2/en
Publication of WO2022032780A1 publication Critical patent/WO2022032780A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment

Definitions

  • the present invention relates to the field of display technology, and in particular, to a viewing angle compensation method of a display panel and a display panel.
  • the resolution of the panel As the resolution of the panel is gradually improved, at present, it can reach 8K (7680x4320) or more.
  • the impact of the improvement of the resolution is that the aperture ratio decreases and the penetration rate of the panel is reduced. Therefore, the original 8-domain (Domain) design of the original viewing angle improvement solution cannot be applied in higher resolution products due to the loss of transmittance. Instead, the 4-domain pixel structure is used, but it also leads to the deterioration of the viewing angle characteristics, which requires viewing angle compensation to improve. Viewing angle characteristics.
  • the negative effect brought by the use of viewing angle compensation is the graininess of the picture.
  • the use of sequential viewing angle compensation can effectively reduce the graininess of the picture. Vertical stripes of light and dark, which can only be observed when the user's head is shaking and looking sideways at the monitor screen, also known as the vertical line), so there will be this defect in application.
  • FIG. 1 is a comparison diagram of a side-view luminance curve and a front-view gamma curve of a display in the prior art
  • FIG. 2 is a schematic diagram of grayscale value changes of some pixels of a display in the prior art before and after viewing angle compensation adjustment.
  • VAC grayscale viewing angle compensation
  • H represents the high grayscale value
  • L represents the low grayscale value
  • the average value of brightness that satisfies the HL grayscale is equal to the brightness value of the 128 grayscale.
  • the horizontal axis of Figure 1 is Gray Level
  • the vertical axis of Figure 1 is Normalized Luminance. 1.
  • the gamma curves of side view and front view are inconsistent, and the greater the difference between the gamma curves of side view (Off-axis) and the front view (On-axis), the worse the side view taste.
  • the vertical bright and dark stripes are especially obvious when viewed from the side.
  • the mechanism analysis of the improvement by the method in Figure 2 is as follows: from time to time, at the same pixel position, switch between the H and L grayscales in sequence, where H represents the high grayscale value , L represent low grayscale values, which can be H, L, H, L... or H, H, L, L, H, H, L, L... .
  • H represents the high grayscale value
  • L represent low grayscale values, which can be H, L, H, L... or H, H, L, L, H, H, L, L... .
  • FIG. 3 is the voltage waveform diagram of four consecutive frames f1, f2, f3, and f4 at the same pixel position in the prior art; as shown in Fig. 3, the positive and negative electrodes are switched synchronously at the same pixel position, which can ensure that the liquid crystal molecules are switched. It will not be polarized, and every time it switches from positive to negative or from negative to positive, its voltage waveform will also change accordingly.
  • FIG. 4 is a schematic diagram of a pixel array of two frames of images switched alternately in the prior art.
  • each square represents a pixel
  • H represents a high grayscale value
  • L represents a low grayscale value
  • + represents a forward voltage
  • - represents the reverse voltage.
  • the grayscale values of L+, L- and H+, H- are consistent, and when the positive and negative voltages of each pixel are switched, the effective voltages are not consistent, so the response time of the liquid crystal is also inconsistent, so the following technology will occur.
  • the present invention provides a viewing angle compensation method for a display panel and a display panel, and an overload driving method, which uses multiple sets of overload driving tables to solve the problem of gray scales between different polarities.
  • the asymmetric reaction time of the liquid crystal during switching brings about the technical problem of uneven brightness of vertical bright and dark stripes.
  • the present invention provides a viewing angle compensation method for a display panel, comprising the steps of: providing a display panel, wherein the display panel includes pixel units arranged in an array, and the pixel units include a first type of pixel unit and a second type of pixel unit, The first type of pixel unit and the second type of pixel unit are arranged adjacently; the step of setting data polarity is to set the data polarities input to the first type of pixel unit and the second type of pixel unit in the same frame to be different, The data polarities of the pixel units in the same position are set to be input in two consecutive frames to be different; the gray-scale value conversion step of each consecutive frame is set, and the gray-scale values of the pixel units in the same position are set to be input in two consecutive frames to be different; in the previous frame The grayscale values of the first type of pixel unit input to the first type of pixel unit are different from those of the first type of pixel unit input in the next frame, and the second type of pixel unit input in the previous frame
  • the overload grayscale value on one side of the first target grayscale set the grayscale values of the first type pixel unit and the second type pixel unit in the third frame to be the second target grayscale, the the first target grayscale; set the grayscale values of the first type of pixel unit and the second type of pixel unit in the fourth frame as the second adjusted grayscale and the first adjusted grayscale; set to the first The sequence of the first frame, the second frame, the third frame and the fourth frame is cycled. When the brightness of the second frame reaches the preset brightness, it switches to the third frame, and when the brightness of the fourth frame reaches the preset brightness Switch to the first frame when setting the brightness.
  • each partition includes the pixel units in even-numbered columns; in two adjacent partitions, the polarity of the data input to the first type of pixel units in the same frame is the same, The polarities of the data input to the second type of pixel unit in the same frame are the same; the grayscale values of the first type of pixel units input to the adjacent two partitions for two consecutive frames are different, and the grayscale values of the first type pixel units input to the adjacent two partitions for two consecutive frames are input.
  • the grayscale values of the second type of pixel units are different.
  • the pixel units of the first type and the pixel units of the second type are arranged adjacent to each other in the same row, and the pixel units of the first type and the pixel units of the second type are arranged in the same column.
  • the adjacent arrangement makes the pixel units arranged in adjacent rows and adjacent columns array different from each other, and the first type of pixel units and the second type of pixel units are arranged alternately with each other.
  • each pixel unit is electrically connected to a data line, a data signal is input to each data line, and the polarity of the data signal input to the data line is the data polarity.
  • the polarities of the data input to the pixel units of the first type and the pixel units of the second type include positive and negative.
  • the polarity of the data input to the first type of pixel unit in the previous frame is opposite to that of the input of the first type of pixel unit in the next frame, and the second type of pixel unit is input in the previous frame.
  • the polarity of the data input to the pixel unit of the second type in the next frame is opposite to that of the pixel unit of the second type.
  • the first-type pixel is input in the next frame.
  • the level value of the unit is the second grayscale range; if the level value of the second type of pixel unit entered in the previous frame is the second grayscale range, then the level of the second type of pixel unit is input in the next frame.
  • the value is the first grayscale range.
  • the grayscale values in the multiple sets of overload drive tables include the first target grayscale, the second target grayscale, the first adjustment grayscale, the second adjusted grayscale.
  • the maximum grayscale values of the first target grayscale, the second target grayscale, the first adjusted grayscale, and the second adjusted grayscale include, but are not limited to, 128 or 255.
  • the present invention also provides a display panel, the manufacturing method of which includes the aforementioned method for compensating the viewing angle of the display panel.
  • the beneficial effect of the present invention is to provide a viewing angle compensation method of a display panel and a display panel, adopting an overload driving method, applying multiple sets of overload driving tables to set in stages, and rapidly increasing or reducing the pixel point by means of overloading.
  • the grayscale value enables the target voltage to quickly reach the required value, and the preset grayscale can be reached in time, thereby improving the brightness trend and avoiding vertical bright and dark stripes.
  • FIG. 1 is a comparison diagram of a side-view luminance curve and a front-view gamma curve of a display panel in the prior art
  • FIG. 2 is a schematic diagram of the grayscale value change of some pixel points of a display panel before and after viewing angle compensation adjustment in the prior art
  • FIG. 3 is a voltage waveform diagram of a display panel at the same pixel position for four consecutive frames in the prior art
  • FIG. 4 is a schematic diagram of a pixel array of two frames of images alternately switched in a display panel in the prior art
  • FIG. 5 is a schematic diagram of a pixel array of two frames of images alternately switched in a display panel according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a viewing angle compensation method of a display panel according to an embodiment of the present invention.
  • the driving voltage is correspondingly switched, so there will be a cycle of transformation from a low voltage value to a high voltage value, and then from a high voltage value to a low voltage value.
  • the grayscale value can be switched in successive frames, the target voltage If the desired value can be reached quickly, the preset grayscale can be reached in time, thereby improving the brightness trend and avoiding vertical bright and dark stripes.
  • the present invention further proposes an overload driving method, which can quickly reach the required value by applying multiple sets of overload driving tables to control the voltage, so as to solve the uneven brightness caused by the asymmetry of the liquid crystal response time when switching between different polarities of gray scales. technical issues.
  • the present invention quickly increases or decreases the grayscale value by overloading, that is, quickly changes the grayscale values of L+, L-, H+, and H- to the target grayscale values H-, H+, L- and L+ tend to be H-', H+', L-', L+' on the side of the change trend direction, and then switch to the pre-change target values H-, H+ when the brightness of the corresponding gray-scale change position reaches the expected brightness , L-, L+, if the voltage can quickly reach the required value, the preset grayscale can be reached in time, thereby improving the brightness trend and avoiding vertical bright and dark stripes.
  • FIG. 6 is a flowchart of a viewing angle compensation method of a display panel according to an embodiment of the present invention. As shown in FIG. 6 , the viewing angle compensation method of a display panel includes the following steps S1-S4. It should be noted that the execution sequence of step S2 and step S3 is not strictly limited, and step S2 and step S3 may be executed simultaneously or the execution sequence of step S3 is earlier than step S2.
  • Step of providing a display panel the display panel includes pixel units arranged in an array, the pixel units include a first type of pixel unit 11 and a second type of pixel unit 12, the first type of pixel unit 11 and the The second type of pixel units 12 are arranged adjacently.
  • the first type pixel unit 11 and the second type pixel unit 12 are arranged adjacently in the same row, and the first type pixel unit 11 and the second type pixel unit 12 are arranged adjacently in the same column, so that the The pixel units arranged in adjacent rows and adjacent columns are different from each other, and the first type of pixel units 11 and the second type of pixel units 12 are arranged alternately.
  • Each pixel unit is electrically connected to a data line, a data signal is input to each data line, and the polarity of the data signal input to the data line is called the data polarity.
  • the polarities of the data input to the pixel unit 11 of the first type and the pixel unit 12 of the second type include positive and negative.
  • the step of setting data polarity, setting the data polarity input to the first type pixel unit 11 and the second type pixel unit 12 in the same frame to be different, setting the data polarity input to the pixel unit at the same position for two consecutive frames Sex is different.
  • the polarity of the data input to the first type of pixel unit 11 in the previous frame is opposite to that of the data input to the first type of pixel unit 11 in the next frame, and the data input to the second type of pixel unit 12 in the previous frame and the next frame
  • the data polarities of the second type of pixel units 12 are opposite.
  • the polarity of the data input to the pixel unit 11 of the first type is positive in the same frame, the polarity of the data input to the pixel unit 12 of the second type in this frame is negative; If the polarity of the data of the pixel unit 11 of the first type is negative, the polarity of the data input to the pixel unit 12 of the second type in this frame is positive.
  • the level value input to the first type of pixel unit 11 input in the previous frame is the first grayscale range
  • the level value input to the first type of pixel unit 11 in the next frame is the second grayscale range
  • the level value input to the second type of pixel unit 12 in the previous frame is the second grayscale range
  • the level value input to the second type of pixel unit 12 in the next frame is the first grayscale range
  • the input level value of the first type of pixel unit 11 in the same frame is the first gray level range
  • the input level value of the second type pixel unit 12 in this frame is the second gray level range
  • the input level value of the second type pixel unit 12 in this frame is the first gray level range .
  • the first grayscale range is a high grayscale, which is represented by H
  • the second grayscale range is a low grayscale, which is represented by L.
  • S4 the step of setting the gray scale value of successive frames, specifically including steps S41-S46.
  • S41 searching for a pair of grayscales on the emmetrope gamma curve according to the preset brightness, which are the first target grayscale and the second target grayscale respectively.
  • S42 Set the grayscale values of the first type of pixel unit 11 and the second type of pixel unit 12 in the first frame to the first target grayscale and the second target grayscale, respectively.
  • the first adjusted grayscale is the When the first target grayscale changes to an overload grayscale value that is biased toward one side of the second target grayscale along a change trend when the second target grayscale changes, the second target grayscale is located at the first target grayscale and the first adjusted gray level; the second adjusted gray level is the change trend that is biased to the side of the first target gray level when the second target gray level changes to the first target gray level Overload grayscale value, the first target grayscale is located between the second target grayscale and the second adjusted grayscale.
  • the gray scale value changing method when changing from the first frame f1 to the second frame f2 in FIG. 5 as an example, the gray scale value is rapidly increased or decreased by overloading value, that is, quickly change the grayscale values of L+, L-, H+, H- to the target grayscale values H-, H+, L-, L+, which tend to be H-', H+', L on the side of the change trend direction.
  • -', L+' and when the brightness of the corresponding grayscale change position reaches the expected brightness, switch from the second frame f2 to the pre-change target values H-, H+, L-, L+ of the third frame f3.
  • Table 1 is a table of grayscale values and brightness changes in successive frames.
  • Table 1 taking the viewing angle compensation (VAC) adjustment of 255 grayscales as an example, look for a pair of HL grayscales on the emmetrope gamma curve, where H represents high grayscale. value, L represents the low grayscale value, and the brightness average value satisfying the HL grayscale is equal to the brightness value of the 128 grayscale. switch between.
  • VAC viewing angle compensation
  • the first frame f1 is set to a grayscale value of 50, and the actual measured brightness corresponds to 50; the grayscale value of the first frame f1 is pre-changed to 50 is the gray-scale brightness of the third frame f3 of 180.
  • a second frame f2 that acts as an overload is set between the first frame f1 and the third frame f3, and the second frame f2 is set to The grayscale value is 200.
  • the grayscale value of the second frame f2 is switched from 200 to the grayscale value of the third frame f3 of 180, and the grayscale brightness is kept at 180; the same Reason, change from the third frame f3 to the first frame f1 of the next cycle, set the fourth frame f4 that plays an overload role between the third frame f3 and the first frame f1 of the next cycle, and set the fourth frame f4
  • the gray-scale value of 35 is 35, and the gray-scale value of 35 is the value on the side of the decreasing trend direction that is less than the gray-scale value of f1 in the first frame of the next cycle.
  • the grayscale brightness is 50.
  • the grayscale value of the fourth frame f4 is switched from the grayscale value of 200 to the grayscale value of the first frame f1 of the next cycle of 50, and the grayscale value is maintained.
  • the brightness is 50, that is, the periodic change with f1, f2, f3, and f4 as the cyclic sequence is realized.
  • the step S4 of setting the gray scale values of successive frames multiple sets of overload drive tables are respectively set, and the multiple sets of overload drive tables are divided into “positive, positive, “"Positive, Negative", “Negative, Positive”, “Negative, Negative” four kinds. Taking “positive and negative” as an example, the initial data polarity is positive, and the changed data polarity is negative.
  • the grayscale values in the multiple sets of overload drive tables include the first target grayscale, the second target grayscale, the first adjusted grayscale, and the second adjusted grayscale.
  • the maximum grayscale values of the first target grayscale, the second target grayscale, the first adjusted grayscale, and the second adjusted grayscale include but are not limited to 128 or 255, that is, The grayscale value ranges of the first target grayscale, the second target grayscale, the first adjusted grayscale, and the second adjusted grayscale are 0-128 or 0-255. It is worth noting that the positions of the maximum grayscale values of the first target grayscale, the second target grayscale, the first adjusted grayscale, and the second adjusted grayscale are equal.
  • a plurality of partitions are set in the display panel, and each partition includes the pixel units in even-numbered columns; in two adjacent partitions, the same frame is input to the first type
  • the data polarities of the pixel units 11 are the same, and the data polarities input to the second type pixel units 12 in the same frame are the same;
  • the grayscale values of the second type of pixel units 12 in two consecutive frames input to two adjacent partitions are different.
  • the present invention also provides a display panel, the manufacturing method of which includes the aforementioned method for compensating the viewing angle of the display panel.
  • the beneficial effect of the present invention is to provide a viewing angle compensation method of a display panel and a display panel, and to provide an overload driving method, which uses multiple sets of overload driving tables to set in stages, and quickly increases or decreases the gray scale value by overloading. , if the voltage can quickly reach the required value, the preset grayscale can be reached in time, thereby improving the brightness trend and avoiding vertical bright and dark stripes.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
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Abstract

一种显示面板的视角补偿方法及显示面板，包括步骤：提供一显示面板步骤(S1)、设置数据极性步骤(S2)、设置连续各帧灰阶值变换步骤(S3)、设置连续各帧灰阶取值步骤(S4)。

Description

显示面板的视角补偿方法及显示面板 技术领域
本发明涉及显示技术领域，尤其涉及一种显示面板的视角补偿方法及显示面板。
 背景技术
随着面板解析度逐渐提升，目前以达到8K（7680x4320）以上，在面板尺寸不变的情形下，解析度的提升带来的影响是开口率降低减少了面板的穿透率。 因此原视角改善方案8畴（Domain）设计因穿透率损失的因素而无法在更高解析度产品中应用，取而代之的是4畴像素架构，但也导致了视角特性恶化，需要视角补偿来提升视角特性。
为了提高视角而采用视角补偿所带来的负面效应便是画面产生颗粒感，使用时序式视角补偿可有效降低画面颗粒感，但是又因为液晶反应会对应不同极性间灰阶切换导致产生明显的竖直亮暗带状条纹，由于该条纹只有在用户头部晃动且侧视显示器画面时才能观察到，通常也被称为摇头纹（Vertical line），因此在应用上会有该缺陷。
图1为现有技术中一显示器的侧视亮度曲线与正视伽玛曲线的对照图；图2为现有技术中一显示器在视角补偿调整前后的部分像素点的灰阶值变化示意图。如图1所示，以128灰阶的视角补偿（VAC）调整为例，在正视伽玛（gamma）曲线上寻找一对HL灰阶，其中H代表高灰阶值、L代表低灰阶值，满足HL灰阶的亮度平均值与128灰阶的亮度值相等，假如最终找到满足条件的H=180，L=50，如图2所示，为128灰阶下的视角补偿前后的数据映射（data mapping），此时侧视伽玛曲线上的128灰阶位置的点B就会被下压至伽玛曲线上的C点，在A点、D点的原理相同，从而改善侧视颜色的漂移的问题。由视角补偿前均一为128灰阶的像素变更为视角补偿后的间隔设置128和50两种HL灰阶，从而改善了侧视颜色的漂移，但这样由于HL灰阶亮度不同，使得画面出现了颗粒感。
结合图1分析侧视时产生明显的竖直亮暗带状条纹的根本原因，图1的横轴为灰阶值（Gray Level），图1的纵轴为标准亮度值（Normalized Luminance），图1中侧视与正视的伽马（Gama，GM）曲线不一致，侧视（Off-axis）与正视（On-axis）的伽马曲线差异越大，侧视品味越差。
竖直亮暗带状条纹在侧视时尤为明显，其通过图2的方法改善的机理分析为：从时间上，在同一像素位置依次在H、L灰阶切换，其中H代表高灰阶值、L代表低灰阶值，具体可以为H、L、H、L……或者H、H、L、L、H、H、L、L……。经测试，在大于110Hz的高频方式驱动时肉眼观察无闪烁，在小于110Hz的低频方式驱动时肉眼观察可见闪烁。图3为现有技术中同一像素位置连续四帧f1、f2、f3、f4的电压波形图；如图3所示，在同一像素位置的驱动电压同步进行正负极切换，这样可以保证液晶分子不会被极化，而每一次由正极切换为负极或者由负极切换为正极时，其电压的波形也会随之变动。
通过图3中的连续四帧f1、f2、f3、f4的电压可知，由f1至f2时的电压只有达到阈值电压V1时才能实现像素驱动，而从f1的电压变化为f2的电压需要一定的时间，从而导致不能及时达到预设的灰阶，从而亮度出现趋向。同理，从f2至f3时的电压原理相同，从f2的电压变化为f3的电压需要一定的时间，从而导致不能及时达到预设的灰阶，从而亮度出现趋向。
图4为现有技术中交替切换的两帧影像的像素阵列示意图，在图4中，每一方格代表一像素点，H代表高灰阶值、L代表低灰阶值、+代表正向电压、-代表反向电压。当每一帧影像被切换时，依照帧间像素点的极性排列方式，每一像素点的H、L有数种切换可能，包括H+→L-；H-→L+；H+→L+；H-→L-；L+→H-；L-→H+；L+→H+；L-→H-。其中，L+、L-与H+、H-的灰阶值一致，而每一像素点的正负电压切换时，其有效电压并不一致，因此实际上液晶的反应时间也不一致，因此会产生如下技术问题：像素点的灰阶值由L+被切换为H-或者由L-被切换为H+的两种情况下，该像素点的亮度及亮度变化量不同；同理，像素点的灰阶值由H+切换为L-或者由H-切换为L+的两种情况下，该像素点的亮度及亮度变化量也不同。因此，当用户头部晃动且侧视显示器画面时，会观察到较为明显竖直亮暗带状条纹。
 技术问题
针对以上现有技术存在的缺点和不足之处，本发明提供一种显示面板的视角补偿方法及显示面板，提出一种过载驱动的方法，应用多组过载驱动表解决了不同极性间灰阶切换时液晶反应时间不对称带来竖直亮暗带状条纹的亮度不均匀的技术问题。
 技术解决方案
本发明提供一种显示面板的视角补偿方法，包括步骤：提供一显示面板步骤，所述显示面板包括阵列排布的像素单元，所述像素单元包括第一类像素单元以及第二类像素单元，所述第一类像素单元和所述第二类像素单元相邻设置；设置数据极性步骤，设置同一帧输入所述第一类像素单元和所述第二类像素单元的数据极性不同，设置连续两帧输入同一位置的所述像素单元的数据极性不同；设置连续各帧灰阶值变换步骤，设置连续两帧输入同一位置的所述像素单元的灰阶值不同；在上一帧输入所述第一类像素单元与下一帧输入所述第一类像素单元的灰阶值数值不同，在上一帧输入所述第二类像素单元与下一帧输入所述第二类像素单元的灰阶值数值不同；以及设置连续各帧灰阶取值步骤，根据预设亮度在正视伽玛曲线上寻找一对灰阶，分别为第一目标灰阶、第二目标灰阶；设置第一帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第一目标灰阶、所述第二目标灰阶；设置第二帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为第一调整灰阶、第二调整灰阶，所述第一调整灰阶为所述第一目标灰阶变化为所述第二目标灰阶时沿变化趋势偏向所述第二目标灰阶一侧的过载灰阶值，所述第二调整灰阶为所述第二目标灰阶变化为所述第一目标灰阶时沿变化趋势偏向所述第一目标灰阶一侧的过载灰阶值；设置第三帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第二目标灰阶、所述第一目标灰阶；设置第四帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第二调整灰阶、所述第一调整灰阶；设置以第一帧、第二帧、第三帧、第四帧的顺序进行循环，当所述第二帧的亮度达到预设亮度时切换为所述第三帧，当所述第四帧的亮度达到预设亮度时切换为所述第一帧。
进一步地，在所述显示面板中设有多个分区，每一分区包括偶数列所述像素单元；在相邻两个分区内，同一帧输入所述第一类像素单元的数据极性相同，同一帧输入所述第二类像素单元的数据极性相同；连续两帧输入相邻两个分区的所述第一类像素单元的灰阶值不同，连续两帧输入相邻两个分区的所述第二类像素单元的灰阶值不同。
进一步地，在所述显示面板中，在同一行所述第一类像素单元和所述第二类像素单元相邻设置，在同一列所述第一类像素单元和所述第二类像素单元相邻设置，使得在相邻行和相邻列阵列排布的像素单元互不相同，所述第一类像素单元和所述第二类像素单元互为交错设置。
进一步地，每一像素单元电性连接一数据线，每一数据线上输入一数据信号，输入所述数据线的数据信号的极性为所述数据极性。
进一步地，输入所述第一类像素单元和所述第二类像素单元的数据极性包括正、负两种。
进一步地，在设置数据极性步骤中，在上一帧输入所述第一类像素单元与下一帧输入所述第一类像素单元的数据极性相反，在上一帧输入所述第二类像素单元与下一帧输入所述第二类像素单元的数据极性相反。
进一步地，在设置连续各帧灰阶值变换步骤中，若在上一帧输入所述第一类像素单元的阶值数值为第一灰阶范围，则在下一帧输入所述第一类像素单元的阶值数值为第二灰阶范围；若在上一帧输入所述第二类像素单元的阶值数值为第二灰阶范围，则在下一帧输入所述第二类像素单元的阶值数值为第一灰阶范围。
进一步地，在设置连续各帧灰阶取值步骤中，分别设置多组过载驱动表，所述多组过载驱动表分别按连续两帧像素单元的数据极性分为“正、正”“正、负”“负、正”“负、负”四种，所述多组过载驱动表中的灰阶值包括所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶。
进一步地，所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶的最大灰阶值包括但不限于128或255。
本发明还提供一种显示面板，其制造方法中包括前文所述的显示面板的视角补偿方法。
 有益效果
本发明的有益效果在于，提供一种显示面板的视角补偿方法及显示面板，采用一种过载驱动的方法，应用多组过载驱动表分阶段设置，通过过载的方式迅速拉高或降低像素点的灰阶值，使得目标电压能快速达到所需数值，即可及时达到预设的灰阶，从而改善亮度趋向，避免出现竖直亮暗带状条纹。
 附图说明
图1为现有技术中一显示面板的侧视亮度曲线与正视伽玛曲线的对照图；
图2为现有技术中一显示面板在视角补偿调整前后的部分像素点的灰阶值变化示意图；
图3为现有技术中一显示面板在同一像素位置连续四帧的电压波形图；
图4为现有技术中一显示面板的交替切换的两帧影像的像素阵列示意图；
图5为本发明实施例所述显示面板的交替切换的两帧影像的像素阵列示意图；
图6为本发明实施例所述的一种显示面板的视角补偿方法的流程图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在同一像素位置连续各帧交替切换灰阶值时，对应切换驱动电压，因此会出现周而复始的从低电压值变换为高电压值，再从高电压值变换为低电压值，在电压变化过程中，尤其是从低电压值变换为高电压值时存在较长的切换时间，导致不能及时达到预设的灰阶值而存在亮度差，若能够在连续各帧切换灰阶值时，使得目标电压能快速达到所需数值，即可及时达到预设的灰阶，从而改善亮度趋向，避免出现竖直亮暗带状条纹。基于此，本发明进一步提出一种过载驱动的方法，应用多组过载驱动表控制电压能快速达到所需数值，以解决不同极性间灰阶切换时液晶反应时间不对称带来的亮度不均匀的技术问题。
图5为本发明实施例所述显示面板的交替切换的两帧影像的像素阵列示意图。如图5所示，本发明通过过载的方式迅速将拉高或降低灰阶值，即迅速将L+、L-、H+、H-的灰阶值先变化为目标灰阶值H-、H+、L-、L+更加趋向变化趋势方向一侧的H-’、H+’、L-’、L+’，再在对应灰阶变化位置的亮度达到预期亮度时切换为预变化的目标值H-、H+、L-、L+，满足电压能快速达到所需数值，即可及时达到预设的灰阶，从而改善亮度趋向，避免出现竖直亮暗带状条纹。
图6为本发明实施例提供的一种显示面板的视角补偿方法的流程图，如图6所示，所述的一种显示面板的视角补偿方法包括以下步骤S1-S4。应当注意的是，其中步骤S2和步骤S3的执行顺序不做严格限定，步骤S2和步骤S3可同时执行或者步骤S3的执行顺序早于步骤S2。
S1、提供一显示面板步骤，所述显示面板包括阵列排布的像素单元，所述像素单元包括第一类像素单元11以及第二类像素单元12，所述第一类像素单元11和所述第二类像素单元12相邻设置。
在同一行所述第一类像素单元11和所述第二类像素单元12相邻设置，在同一列所述第一类像素单元11和所述第二类像素单元12相邻设置，使得在相邻行和相邻列阵列排布的像素单元互不相同，所述第一类像素单元11和所述第二类像素单元12互为交错设置。
每一像素单元电性连接一数据线，每一数据线上输入一数据信号，输入所述数据线的数据信号的极性称为数据极性。输入所述第一类像素单元11和所述第二类像素单元12的数据极性包括正、负两种。
S2、设置数据极性步骤，设置同一帧输入所述第一类像素单元11和所述第二类像素单元12的数据极性不同，设置连续两帧输入同一位置的所述像素单元的数据极性不同。
在上一帧输入所述第一类像素单元11与下一帧输入所述第一类像素单元11的数据极性相反，在上一帧输入所述第二类像素单元12与下一帧输入所述第二类像素单元12的数据极性相反。
若在同一帧输入所述第一类像素单元11的数据极性为正，则在该帧输入所述第二类像素单元12的数据极性为负；反之亦然，即若在同一帧输入所述第一类像素单元11的数据极性为负，则在该帧输入所述第二类像素单元12的数据极性为正。
S3、设置连续各帧灰阶值变换步骤，设置连续两帧输入同一位置的所述像素单元的灰阶值不同；在上一帧输入所述第一类像素单元11与下一帧输入所述第一类像素单元11的灰阶值数值不同，在上一帧输入所述第二类像素单元12与下一帧输入所述第二类像素单元12的灰阶值数值不同。
若在上一帧输入所述第一类像素单元11的阶值数值为第一灰阶范围，则在下一帧输入所述第一类像素单元11的阶值数值为第二灰阶范围；若在上一帧输入所述第二类像素单元12的阶值数值为第二灰阶范围，则在下一帧输入所述第二类像素单元12的阶值数值为第一灰阶范围。
若在同一帧输入所述第一类像素单元11的阶值数值为第一灰阶范围，则在该帧输入所述第二类像素单元12的阶值数值为第二灰阶范围；反之亦然，即若在同一帧输入所述第一类像素单元11的阶值数值为第二灰阶范围，则在该帧输入所述第二类像素单元12的阶值数值为第一灰阶范围。其中第一灰阶范围为高灰阶，用H表示，所述第二灰阶范围为低灰阶，用L表示。
S4、设置连续各帧灰阶取值步骤，具体包括步骤S41-S46。S41、根据预设亮度在正视伽玛曲线上寻找一对灰阶，分别为第一目标灰阶、第二目标灰阶。S42、设置第一帧所述第一类像素单元11和所述第二类像素单元12的灰阶值分别为所述第一目标灰阶、所述第二目标灰阶。S43、设置第二帧所述第一类像素单元11和所述第二类像素单元12的灰阶值分别为第一调整灰阶、第二调整灰阶，所述第一调整灰阶为所述第一目标灰阶变化为所述第二目标灰阶时沿变化趋势偏向所述第二目标灰阶一侧的过载灰阶值，所述第二目标灰阶位于所述第一目标灰阶与所述第一调整灰阶之间；所述第二调整灰阶为所述第二目标灰阶变化为所述第一目标灰阶时沿变化趋势偏向所述第一目标灰阶一侧的过载灰阶值，所述第一目标灰阶位于所述第二目标灰阶与所述第二调整灰阶之间。S44、设置第三帧所述第一类像素单元11和所述第二类像素单元12的灰阶值分别为所述第二目标灰阶、所述第一目标灰阶。S45、设置第四帧所述第一类像素单元11和所述第二类像素单元12的灰阶值分别为所述第二调整灰阶、所述第一调整灰阶。S46、设置以第一帧、第二帧、第三帧、第四帧的顺序进行循环，当所述第二帧的亮度达到预设亮度时切换为所述第三帧，当所述第四帧的亮度达到预设亮度时切换为所述第一帧。
其中，以图5中的由第一帧f1至第二帧f2时灰阶值变化方式为例，从第一帧f1变化为第二帧f2时，通过过载的方式迅速拉高或降低灰阶值，即迅速将L+、L-、H+、H-的灰阶值先变化为目标灰阶值H-、H+、L-、L+更加趋向变化趋势方向一侧的H-’、H+’、L-’、L+’，再在对应灰阶变化位置的亮度达到预期亮度时，再从第二帧f2切换为第三帧f3预变化的目标值H-、H+、L-、L+。然后要想从第三帧f3变化为第一帧f1，同理设置第四帧f4的过载方式迅速拉高或降低灰阶值，从而满足电压能快速达到所需数值，即可及时达到预设的灰阶，从而改善亮度趋向，避免出现竖直亮暗带状条纹。
表1为连续各帧灰阶值及亮度变化表，表1中以255灰阶的视角补偿（VAC）调整为例，在正视伽玛曲线上寻找一对HL灰阶，其中H代表高灰阶值、L代表低灰阶值，满足HL灰阶的亮度平均值与128灰阶的亮度值相等，假如最终找到满足条件的H=180，L=50，从而目标灰阶值在180和50之间切换。通过表1中的连续四帧f1、f2、f3、f4的数据举例，首先第一帧f1设定为灰阶值50，其实测亮度对应为50；第一帧f1的灰阶值50预变化为第三帧f3的灰阶亮度180，为保证短时间快速变化的需求，在第一帧f1和第三帧f3之间设置起到过载作用的第二帧f2，第二帧f2设定为灰阶值200，当第一帧f1的实测亮度由50变化为180时，从第二帧f2的灰阶值200切换为第三帧f3的灰阶值180，保持灰阶亮度为180；同理，从第三帧f3变化为下一周期的第一帧f1，在第三帧f3和下一周期的第一帧f1之间设置起到过载作用的第四帧f4，设置第四帧f4的灰阶值为35，灰阶值35为小于下一周期第一帧f1灰阶值50的变小趋势方向一侧的数值，保证从第三帧f3灰阶亮度为180短时间快速变化至灰阶亮度为50，当第四帧f4的实测亮度由180变化为50时，从第四帧f4的灰阶值200切换为下一周期的第一帧f1的灰阶值50，保持灰阶亮度为50，即实现以f1、f2、f3、f4为循环顺序的周期变化。
表1
连续帧 f1 f2 f3 f4 f1
实测亮度 50 180 180 50 50
变化灰阶值 50 200 180 35 50
本实施例中，在设置连续各帧灰阶取值步骤S4中，分别设置多组过载驱动表，所述多组过载驱动表分别按连续两帧像素单元的数据极性分为“正、正”“正、负”“负、正”“负、负”四种。以“正、负”为例，初始数据极性为正，变化后的数据极性为负。所述多组过载驱动表中的灰阶值包括所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶。
本实施例中，所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶的最大灰阶值包括但不限于128或255，即所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶的灰阶值范围为0-128或0-255。值得注意的是，在所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶的最大灰阶值位置相等。
如图5所示，本实施例中，在所述显示面板中设有多个分区，每一分区包括偶数列所述像素单元；在相邻两个分区内，同一帧输入所述第一类像素单元11的数据极性相同，同一帧输入所述第二类像素单元12的数据极性相同；连续两帧输入相邻两个分区的所述第一类像素单元11的灰阶值不同，连续两帧输入相邻两个分区的所述第二类像素单元12的灰阶值不同。
本发明还提供一种显示面板，其制造方法中包括前文所述的显示面板的视角补偿方法。
本发明的有益效果在于，提供一种显示面板的视角补偿方法及显示面板，提出一种过载驱动的方法，应用多组过载驱动表分阶段设置，通过过载的方式迅速拉高或降低灰阶值，满足电压能快速达到所需数值，即可及时达到预设的灰阶，从而改善亮度趋向，避免出现竖直亮暗带状条纹。
以上所述仅是本发明的优选实施例中，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种显示面板的视角补偿方法，其中，包括步骤：
    提供一显示面板步骤，所述显示面板包括阵列排布的像素单元，所述像素单元包括第一类像素单元以及第二类像素单元，所述第一类像素单元和所述第二类像素单元相邻设置；
    设置数据极性步骤，设置同一帧输入所述第一类像素单元和所述第二类像素单元的数据极性不同，设置连续两帧输入同一位置的所述像素单元的数据极性不同；
    设置连续各帧灰阶值变换步骤，设置连续两帧输入同一位置的所述像素单元的灰阶值不同；在上一帧输入所述第一类像素单元与下一帧输入所述第一类像素单元的灰阶值数值不同，在上一帧输入所述第二类像素单元与下一帧输入所述第二类像素单元的灰阶值数值不同；以及
    设置连续各帧灰阶取值步骤，根据预设亮度在正视伽玛曲线上寻找一对灰阶，分别为第一目标灰阶、第二目标灰阶；设置第一帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第一目标灰阶、所述第二目标灰阶；设置第二帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为第一调整灰阶、第二调整灰阶，所述第一调整灰阶为所述第一目标灰阶变化为所述第二目标灰阶时沿变化趋势偏向所述第二目标灰阶一侧的过载灰阶值，所述第二调整灰阶为所述第二目标灰阶变化为所述第一目标灰阶时沿变化趋势偏向所述第一目标灰阶一侧的过载灰阶值；设置第三帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第二目标灰阶、所述第一目标灰阶；设置第四帧所述第一类像素单元和所述第二类像素单元的灰阶值分别为所述第二调整灰阶、所述第一调整灰阶；设置以第一帧、第二帧、第三帧、第四帧的顺序进行循环，当所述第二帧的亮度达到预设亮度时切换为所述第三帧，当所述第四帧的亮度达到预设亮度时切换为所述第一帧。
  2. 根据权利要求1所述显示面板的视角补偿方法，其中，在所述显示面板中设有多个分区，每一分区包括偶数列所述像素单元；在相邻两个分区内，同一帧输入所述第一类像素单元的数据极性相同，同一帧输入所述第二类像素单元的数据极性相同；连续两帧输入相邻两个分区的所述第一类像素单元的灰阶值不同，连续两帧输入相邻两个分区的所述第二类像素单元的灰阶值不同。
  3. 根据权利要求1所述显示面板的视角补偿方法，其中，在所述显示面板中，在同一行所述第一类像素单元和所述第二类像素单元相邻设置，在同一列所述第一类像素单元和所述第二类像素单元相邻设置，使得在相邻行和相邻列阵列排布的像素单元互不相同，所述第一类像素单元和所述第二类像素单元互为交错设置。
  4. 根据权利要求1所述显示面板的视角补偿方法，其中，每一像素单元电性连接一数据线，每一数据线上输入一数据信号，输入所述数据线的数据信号的极性为所述数据极性。
  5. 根据权利要求1所述显示面板的视角补偿方法，其中，输入所述第一类像素单元和所述第二类像素单元的数据极性包括正、负两种。
  6. 根据权利要求1所述显示面板的视角补偿方法，其中，在设置数据极性步骤中，在上一帧输入所述第一类像素单元与下一帧输入所述第一类像素单元的数据极性相反，在上一帧输入所述第二类像素单元与下一帧输入所述第二类像素单元的数据极性相反。
  7. 根据权利要求1所述显示面板的视角补偿方法，其中，在设置连续各帧灰阶值变换步骤中，若在上一帧输入所述第一类像素单元的阶值数值为第一灰阶范围，则在下一帧输入所述第一类像素单元的阶值数值为第二灰阶范围；若在上一帧输入所述第二类像素单元的阶值数值为第二灰阶范围，则在下一帧输入所述第二类像素单元的阶值数值为第一灰阶范围。
  8. 根据权利要求1所述显示面板的视角补偿方法，其中，在设置连续各帧灰阶取值步骤中，分别设置多组过载驱动表，所述多组过载驱动表分别按连续两帧像素单元的数据极性分为“正、正”“正、负”“负、正”“负、负”四种，所述多组过载驱动表中的灰阶值包括所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶。
  9. 根据权利要求1所述显示面板的视角补偿方法，其中，所述第一目标灰阶、所述第二目标灰阶、所述第一调整灰阶、所述第二调整灰阶的最大灰阶值包括但不限于128或255。
  10. 一种显示面板，其中，所述显示面板的制造方法中包括权利要求1所述的显示面板的视角补偿方法。
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