WO2014139199A1 - 过驱动方法、电路、显示面板和显示装置 - Google Patents

过驱动方法、电路、显示面板和显示装置 Download PDF

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Publication number
WO2014139199A1
WO2014139199A1 PCT/CN2013/074851 CN2013074851W WO2014139199A1 WO 2014139199 A1 WO2014139199 A1 WO 2014139199A1 CN 2013074851 W CN2013074851 W CN 2013074851W WO 2014139199 A1 WO2014139199 A1 WO 2014139199A1
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Prior art keywords
grayscale value
overdrive
output
current frame
frame
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PCT/CN2013/074851
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English (en)
French (fr)
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赖意强
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京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Priority to US14/347,803 priority Critical patent/US20160125786A1/en
Publication of WO2014139199A1 publication Critical patent/WO2014139199A1/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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • 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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • 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
    • G09G2320/0252—Improving the response speed
    • 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
    • G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

Definitions

  • the present invention relates to the field of 3D display, and more particularly to an overdrive method, circuit, display panel, and 3D display device. Background technique
  • T-con stores the image data of each frame in a memory, such as SDRAM (Synchronous Dynamic Random Access Memory), DDR (Double Data Rate), double Rate synchronization dynamic random access memory), etc.; when the image data changes, T-con compares the original data of the current frame with the next frame or compares the original data of the current frame with the previous frame, and looks up the table (Look Up) Table, LUT) looks up the drive comparison table and changes the actual data output of the current frame image. Among them, the data in the overdrive comparison table is pre-set and stored inside the T-con.
  • image data of each frame is stored in a memory, and when the image data changes, the original data of the current frame and the previous frame are compared, thereby determining the data output by the T-con to the display panel. .
  • the original data is stored in the memory, so in the comparison process, the original data is compared.
  • the same image data will last for at least 2 frames, and the time at which the driving operation is performed is the first frame that changes, so that the image data can be changed to the previous frame.
  • the original data output to the display panel is the same, so the way of comparing the data is logically reasonable.
  • the technical problem to be solved by the present invention is how to provide an overdriving method, a circuit, a display panel, and a display device, which can speed up the reaction speed of the liquid crystal in the shutter glass type 3D mode, thereby improving the crosstalk phenomenon.
  • an overdrive method including the following steps:
  • the overdrive value corresponding to the change from the initial grayscale value to the target grayscale value is stored in the overdrive comparison table.
  • the searching for an overdrive reference table according to an actual grayscale value output by any pixel of the previous frame and an original grayscale value of the corresponding pixel to be outputted by the current frame, determining that the current frame should be output The steps of the actual grayscale value include:
  • the actual grayscale value outputted by any pixel of the previous frame is used as the starting grayscale value, and the original grayscale value to be outputted by the corresponding pixel of the current frame is used as the target grayscale value, and the overdrive comparison table is searched for, correspondingly
  • the drive value is the actual grayscale value that should be output for the current frame.
  • an exemplary embodiment of the present invention further provides an overdrive circuit, including: a storage module, configured to store an actual grayscale value output by any pixel of a previous frame, and an original gray to be outputted by a corresponding pixel of the current frame.
  • an overdrive circuit including: a storage module, configured to store an actual grayscale value output by any pixel of a previous frame, and an original gray to be outputted by a corresponding pixel of the current frame.
  • a gray scale voltage generating module configured to search an overdrive comparison table according to an actual grayscale value output by any pixel of the previous frame and an original grayscale value of the corresponding pixel to be outputted by the current frame, to determine an actual output of the current frame Grayscale value.
  • the storage module is further configured to store the overdrive comparison table, where the overdrive comparison table stores an overdrive value corresponding to a change from a starting grayscale value to a target grayscale value.
  • the grayscale voltage generating module is configured to input any pixel of the previous frame.
  • the actual grayscale value is used as the starting grayscale value, and the original grayscale value to be outputted by the corresponding pixel of the current frame is used as the target grayscale value, and the overdrive comparison table is searched, and the corresponding overdrive value is output as the current frame.
  • the actual grayscale value is used as the starting grayscale value, and the original grayscale value to be outputted by the corresponding pixel of the current frame is used as the target grayscale value, and the overdrive comparison table is searched, and the corresponding overdrive value is output as the current frame.
  • the actual grayscale value is used as the starting grayscale value, and the original grayscale value to be outputted by the corresponding pixel of the current frame is used as the target grayscale value, and the overdrive comparison table is searched, and the corresponding overdrive value is output as the current frame.
  • a display panel comprising the overdrive circuit as described above.
  • a display device comprising a display panel as described above.
  • the comparison mode compares the actual grayscale value actually outputted to the display panel in the previous frame with the original grayscale value expected to be output in the subsequent frame, so that in the shutter-view 3D mode, Not only can it speed up the liquid crystal reaction speed, but also ensure the correct gray scale value output to the display panel, and there is no problem of excessive driving or insufficient driving, thereby improving 3D crosstalk.
  • FIG. 1 is a schematic diagram of liquid crystal response time when no overdrive technology is used in the prior art
  • FIG. 2 is a schematic diagram of a liquid crystal response time when an overdrive technology is used in the prior art
  • FIG. 3 is a schematic structural view of an overdrive system in the prior art
  • FIG. 4 is a schematic flow chart of an overdrive method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an overdrive circuit according to an embodiment of the present invention. detailed description
  • An exemplary embodiment of the present invention is directed to a problem of causing crosstalk in accordance with an existing gray scale in a shutter-eye mirror type 3D mode, and provides an overdrive method, a circuit, a display panel, and a display device. It is possible to speed up the reaction speed of the liquid crystal in the shutter glass type 3D mode, thereby improving the crosstalk phenomenon.
  • the specific implementation method of the overdrive technology is that the timing control circuit (T-con) stores the image data of each frame in a memory (eg, SDRAM, DDR, etc.), when the image data changes, the T-con ratio For image data of the current frame and the next frame or for comparing the image data of the current frame with the previous frame, The grayscale value output of the current frame image is changed by means of a lookup table (LUT). As shown in FIG.
  • the original image data is changed from gray scale 100 to gray scale 200, where 11 is an ideal liquid crystal response time line, 12 is an actual liquid crystal response curve; in order to improve the response speed of the liquid crystal, when overdrive technology is employed
  • the grayscale 100 changes to the grayscale 200 corresponding to the grayscale 250, wherein the grayscale 100 is the starting grayscale value, the grayscale 200 is the target grayscale value, and the grayscale 250 is the starting grayscale.
  • the grayscale value changes to the overdrive value corresponding to the target grayscale value. As shown in FIG.
  • the T-con first outputs grayscale 250 in the first frame in which the image data changes (ie, the second frame in the figure), and then outputs the original data grayscale 200, where 21 is the ideal liquid crystal response time.
  • Line, 22 is the actual liquid crystal response curve. It can be seen that the actual liquid crystal response curve 22 after the overdrive technique is superior to the actual liquid crystal response curve 12 without the overdrive technique. Among them, the data in the lookup table is pre-set and stored inside the T-con.
  • image data of each frame is stored in a memory, and when the image data changes, the current frame (ie, the Nth frame) and the previous frame are compared (ie, The original grayscale value of the N-1 frame, thereby determining the grayscale value (ie, the Nth, frame data) of the T-con output to the display panel.
  • the original grayscale values are stored in the memory, so in the comparison process, the original grayscale values are compared.
  • the same image data will last for at least 2 frames, and the time at which the driving operation is performed is the first frame that changes, so that the image data can be changed before the previous frame.
  • the order value is the same as the original grayscale value output to the display panel, so the way of comparing the data is logically reasonable.
  • the order of change of the original data is gray scale 100 -> gray scale 200 -> gray scale 200 -> gray scale 200 -> gray scale 100 -> gray scale 100
  • the LUT obtains gray scale 100 -> gray scale
  • the corresponding gray scale of 200 is 250
  • the corresponding gray scale of gray scale 200 -> gray scale 100 is 50
  • the data sequence output to the display panel after T-con processing is gray scale 100 -> gray scale 250 -> gray Step 200 -> Grayscale 200 -> Grayscale 50 -> Grayscale 100.
  • the comparison method of the existing overdrive technology is unreasonable, because in the shutter glasses type 3D mode, odd frames output right eye data, even frames output left eye data or odd frames.
  • the left eye data is output, and the even frame outputs the right eye data, that is, the data of each frame is changing.
  • the order of change of the original data is grayscale 100-> grayscale 200-> grayscale 100-> grayscale 200
  • the existing overdrive mode is adopted, the data output to the display panel is grayscale 100.
  • Grayscale 250-> Grayscale 50-> Grayscale 250 When the third frame is output after the second frame is output, the second frame is output to the display panel as grayscale 250, and the raw data to be outputted in the third frame.
  • the gray scale corresponding to the gray scale 200 -> gray scale 100 is searched in the lookup table, that is, Grayscale 50, so the output is order 100-> grayscale 250-> grayscale 50-> grayscale 250, but this comparison method is unreasonable, which will cause the problem of excessive driving or insufficient driving.
  • the gray scale corresponding to the gray scale 250 -> gray scale 100 should be found in the lookup table, that is, in the shutter glasses type 3D mode, when the image data changes, the correct comparison method is to compare the actual output of the previous frame.
  • the grayscale value to the display panel is compared with the original grayscale value expected to be output by the next frame, instead of comparing the original grayscale value of the previous frame with the original grayscale value expected to be output by the subsequent frame.
  • an exemplary embodiment of the present invention provides an overdrive method, as shown in FIG. 4, the method includes the following steps:
  • Step 401 Obtain an actual grayscale value output by any pixel of the previous frame.
  • Step 402 Obtain an original grayscale value to be outputted by a pixel corresponding to the current frame.
  • Step 403 Find an overdrive comparison table according to an actual grayscale value output by any pixel of the previous frame and an original grayscale value of the corresponding pixel to be outputted by the current frame, and determine an actual grayscale value that the current frame should output.
  • the overdrive value corresponding to the change from the initial grayscale value to the target grayscale value is stored in the overdrive comparison table.
  • step 403 may further include:
  • the actual grayscale value outputted by any pixel of the previous frame is used as the starting grayscale value, and the original grayscale value to be outputted by the corresponding pixel of the current frame is used as the target grayscale value, and the overdrive comparison table is searched for, correspondingly
  • the drive value is the actual grayscale value that should be output for the current frame.
  • the comparison mode is to compare the grayscale value actually outputted by the previous frame with the original grayscale value expected to be outputted in the subsequent frame, so that the shutter target is In the ⁇ 3D mode, not only can the liquid crystal reaction speed be accelerated, but also the correct gray scale value can be output to the display panel, and there is no problem of excessive driving or insufficient driving, thereby improving 3D crosstalk.
  • An exemplary embodiment of the present invention also provides an overdrive circuit. As shown in FIG. 5, the overdrive circuit includes:
  • the storage module 51 is configured to store an actual grayscale value output by any pixel of the previous frame, and an original grayscale value to be outputted by the corresponding pixel of the current frame;
  • the grayscale voltage generating module 52 is configured to search the overdrive comparison table according to the actual grayscale value of the previous frame and the original grayscale value of the current frame, and determine an actual grayscale value that the current frame should output.
  • the storage module 51 further stores an overdrive comparison table, and the overdrive comparison table stores
  • the grayscale voltage generating module 52 may be configured to use the actual grayscale value outputted by the previous frame as the starting grayscale value, and the original grayscale value to be outputted by the current frame as the target grayscale value, and find the overdrive comparison table, and The corresponding overdrive value is taken as the actual grayscale value that the current frame should output.
  • the comparison mode is to compare the grayscale value actually outputted by the previous frame with the original grayscale value expected to be outputted in the subsequent frame, so that the shutter mirror is in the shutter.
  • the 3D mode not only can the liquid crystal reaction speed be accelerated, but also the correct gray scale value can be output to the display panel, and there is no problem of excessive driving or insufficient driving, thereby improving 3D crosstalk.
  • the original grayscale value of the first frame is stored in the storage module 51.
  • the second frame not only the original grayscale value but also the original grayscale value is stored in the storage module 51. Includes the actual grayscale value that is actually output to the display panel.
  • the image data changes, compare the original grayscale value of the current frame of any pixel (ie, the data of the Nth frame) with the grayscale value of the corresponding pixel of the previous frame to the display panel (ie, the Nth, -l frame) Data, thereby determining the grayscale value (ie, Nth, frame data) of the pixel T-con output of the current frame to the display panel, where N>1.
  • the original grayscale value of the second frame is compared with the actual grayscale value of the first frame, and the second, frame data is output through the lookup table (LUT);
  • the grayscale value compare the original grayscale value of the 3rd frame with the actual grayscale value of the 2nd frame, output the 3rd, frame grayscale value through the lookup table (LUT), and so on.
  • the comparison mode is to compare the grayscale value actually outputted to the display panel of the previous frame with the original grayscale value expected to be outputted in the subsequent frame, so that the shutter glasses are In 3D mode, not only can the liquid crystal reaction speed be accelerated, but also the correct gray scale value can be output to the display panel, and there is no problem of excessive driving or insufficient driving, thereby improving 3D crosstalk.
  • An exemplary embodiment of the present invention also provides a display panel including the above-described overdrive circuit.
  • An exemplary embodiment of the present invention also provides a display device including the above display panel.
  • the display device may be: a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like, or any product or component having a display function.
  • the modules may be implemented in software for execution by various types of processors.
  • an identified executable code module can include one or more physics of computer instructions Or a logic block, for example, which can be constructed as an object, procedure, or function. Nonetheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different physicalities. When these instructions are logically combined, they form a module and implement the specified purpose of the module. .
  • the executable code module can be a single instruction or a plurality of instructions, and can even be distributed over a plurality of different code segments, distributed among different programs, and distributed across multiple memory devices.
  • operational data can be identified within the module and can be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including on different storage devices), and may exist, at least in part, only as an electronic signal on a system or network.
  • the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software, and the technician can construct a corresponding hardware circuit to implement the corresponding function without considering the cost.
  • the hardware circuitry includes conventional very large scale integrated circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components. Modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.
  • sequence numbers of the steps are not used to define the order of the steps, and the sequential changes of the steps are also within the protection scope of the present invention.

Abstract

一种过驱动方法、电路、显示面板和显示装置，属于3D显示领域。该过驱动方法包括：获取前一帧任一像素输出的实际灰阶值（401）；获取当前帧对应像素待输出的原始灰阶值（402）；根据所述前一帧的实际灰阶值和所述当前帧的原始灰阶值查找过驱动对照表（403），确定当前帧应当输出的实际灰阶值。快门眼镜式3D模式时使用该方法，可以加快液晶的反应速度，改善串扰现象。

Description

过驱动方法、 电路、 显示面板和显示装置 技术领域
本发明涉及 3D显示领域， 特别是指一种过驱动方法、 电路、 显示面板和 3D显示装置。 背景技术
-液晶显示器） 中， 液晶在 G to G(Gray to Gray, 灰阶转换)的时候反应速度较 慢。 由于驱动液晶的电压差变化越大， 液晶反应越快， 因此现有技术中普遍采 用过驱动 （ Over Driving )技术来加快 G to G的反应速度。 该技术即是在影像 数据发生变化时，在数据发生变化的第一帧提供一个比原始数据更高或更低灰 阶的实际数据， 藉此加大液晶的驱动电压， 第二帧之后再恢复为原始数据， 因 为只有第一帧数据被时序控制电路（T-con ) 改变过， 故而并不会影响到原本 正常影像的显示。
过驱动技术的具体实施方式为： T-con将每一帧的影像数据储存在存储器 ( memory )里, 如 SDRAM ( Synchronous Dynamic Random Access Memory , 同步动态随机存储器）、 DDR ( Double Data Rate, 双倍速率同步动态随机存储 器）等； 在影像数据发生变化时， T-con比对当前帧与后一帧的原始数据或比 对当前帧与前一帧的原始数据， 经过查表的方式 (Look Up Table, LUT)查找过 驱动对照表， 改变当前帧影像的实际数据输出。 其中， 过驱动对照表中的数据 是预先设置好的， 存储在 T-con内部。
现有的过驱动技术中， 在存储器中存储有每一帧的影像数据，在影像数据 发生变化时， 比对当前帧与前一帧的原始数据， 从而决定 T-con输出至显示面 板的数据。 存储器中存储的均为原始数据， 因而在比对过程中， 比对的均为原 始数据。 在 2D模式下， 即使是动态的影像数据， 相同的影像数据也会持续至 少 2帧以上，且执行过驱动操作的时间点为发生变化的第一帧，故可确保影像 数据变化前一帧数据与输出至显示面板的原始数据是相同的，因此该比对数据 的方式在逻辑上是合理的。
但在快门眼镜式 3D模式下， 现有的过驱动技术的比对方式是不合理的， 因为在快门目艮镜式 3D模式下， 奇数帧输出右眼数据， 偶数帧输出左眼数据或 一帧的数据都是在变
Figure imgf000004_0001
达不到原本该显示的灰阶， 导致出现串扰现象。 发明内容
本发明要解决的技术问题是如何提供一种过驱动方法、 电路、显示面板和 显示装置， 能够在快门眼镜式 3D模式下， 加快液晶的反应速度， 从而改善串 扰现象。
为解决上述技术问题， 在本发明的示例性实施例中提供如下技术方案： 一方面， 提供一种过驱动方法， 包括下列步骤：
获取前一帧任一像素输出的实际灰阶值；
获取当前帧对应像素待输出的原始灰阶值；
根据所述前一帧任一像素输出的实际灰阶值和所述当前帧对应像素待输 出的原始灰阶值查找过驱动对照表， 确定当前帧应当输出的实际灰阶值。
可选择地， 上述方案中，在所述过驱动对照表中存储从起始灰阶值变化至 目标灰阶值所对应的过驱动值。
可选择地， 上述方案中， 所述根据所述前一帧任一像素输出的实际灰阶值 和所述当前帧对应像素待输出的原始灰阶值查找过驱动对照表，确定当前帧应 当输出的实际灰阶值的步骤包括：
将前一帧任一像素输出的实际灰阶值作为起始灰阶值，将当前帧对应像素 待输出的原始灰阶值作为目标灰阶值， 查找所述过驱动对照表，将对应的过驱 动值作为当前帧应当输出的实际灰阶值。
另一方面， 本发明的示例性实施例还提供一种过驱动电路， 包括： 存储模块， 用于存储前一帧任一像素输出的实际灰阶值， 以及当前帧对应 像素待输出的原始灰阶值；
灰阶电压生成模块，用于根据所述前一帧任一像素输出的实际灰阶值和所 述当前帧对应像素待输出的原始灰阶值查找过驱动对照表，确定当前帧应当输 出的实际灰阶值。
可选择地， 上述方案中， 所述存储模块还用于存储所述过驱动对照表， 所 述过驱动对照表中存储有从起始灰阶值变化至目标灰阶值所对应的过驱动值。
可选择地， 上述方案中， 所述灰阶电压生成模块用于将前一帧任一像素输 出的实际灰阶值作为起始灰阶值，将当前帧对应像素待输出的原始灰阶值作为 目标灰阶值， 查找所述过驱动对照表，将对应的过驱动值作为当前帧应当输出 的实际灰阶值。
按照本发明的示例性实施例，还提供一种显示面板， 包括如上所述的过驱 动电路。
按照本发明的示例性实施例还提供一种显示装置，包括如上所述的显示面 板。
根据本发明的示例性实施例的技术方案具有以下有益效果：
在影像数据发生变化时，比对方式是比对前一帧实际输出至显示面板的实 际灰阶值与后一帧预计要输出的原始灰阶值， 使得在快门目艮镜式 3D模式下， 不但能够加快液晶反应速度， 并且能确保输出至显示面板的是正确的灰阶值， 不会出现驱动过头或驱动不足的问题， 从而改善 3D 串扰现象。 附图说明
图 1为现有技术中未采用过驱动技术时的液晶响应时间示意图；
图 2为现有技术中采用过驱动技术时的液晶响应时间示意图；
图 3为现有技术中的过驱动系统的结构示意图；
图 4为本发明实施例的过驱动方法的流程示意图；
图 5为本发明实施例的过驱动电路的结构示意图。 具体实施方式
为使本发明的实施例要解决的技术问题、技术方案和优点更加清楚， 下面 将结合附图及具体实施例进行详细描述。
本发明的示例性实施例主要针对在快门目艮镜式 3D模式下， 按照现有的过 的灰阶， 导致出现串扰现象的问题， 提供一种过驱动方法、 电路、 显示面板和 显示装置， 能够在快门眼镜式 3D模式下， 加快液晶的反应速度， 从而改善串 扰现象。
过驱动技术的具体实施方式为时序控制电路（T-con )将每一帧的影像数 据储存在存储器（memory )里 (如： SDRAM、 DDR等）， 在影像数据发生变化 时， T-con比对当前帧与后一帧的影像数据或比对当前帧与前一帧的影像数据， 通过查找表 (Look Up Table, LUT)的方式， 改变当前帧影像的灰阶值输出。 如 图 1所示， 原始的影像数据是从灰阶 100变化到灰阶 200, 其中 11为理想液 晶响应时间线， 12 为实际液晶响应曲线； 为了提高液晶的响应速度， 在采用 过驱动技术时，通过查表可知从灰阶 100变化到灰阶 200对应灰阶 250,其中， 灰阶 100即为起始灰阶值，灰阶 200即为目标灰阶值，灰阶 250即为从起始灰 阶值变化至目标灰阶值所对应的过驱动值。 如图 2所示， T-con在影像数据发 生变化的第一帧（即图中的第 2帧）会先输出灰阶 250, 之后再输出原始数据 灰阶 200, 其中 21为理想液晶响应时间线， 22为实际液晶响应曲线。 可以看 出， 采用过驱动技术后的实际液晶响应曲线 22要优于未采用过驱动技术的实 际液晶响应曲线 12。 其中， 查找表中的数据是预先设置好的， 存储在 T-con 内部。
如图 3所示，现有的过驱动技术中，在存储器中存储有每一帧的影像数据， 在影像数据发生变化时， 比对当前帧 （即第 N帧 ) 与前一帧 （即第 N-1帧 ) 的原始灰阶值，从而决定 T-con输出至显示面板的灰阶值（即第 N，帧的数据）。 存储器中存储的均为原始灰阶值，因而在比对过程中，比对的均为原始灰阶值。 在 2D模式下， 即使是动态的影像数据， 相同的影像数据也会持续至少 2帧以 上， 且执行过驱动操作的时间点为发生变化的第一帧，故可确保影像数据变化 前一帧灰阶值与输出至显示面板的原始灰阶值是相同的，因此该比对数据的方 式在逻辑上是合理的。 举例来说： 当原始数据的变化顺序为灰阶 100 ->灰阶 200 ->灰阶 200 ->灰阶 200 ->灰阶 100 ->灰阶 100, 若 LUT得到灰阶 100 -> 灰阶 200的对应灰阶为 250, 灰阶 200 ->灰阶 100的对应灰阶为 50, 则经过 T-con处理后为输出至显示面板的数据顺序为灰阶 100 ->灰阶 250 ->灰阶 200 ->灰阶 200 ->灰阶 50 ->灰阶 100。
但是， 在快门眼镜式 3D模式下， 现有的过驱动技术的比对方式是不合理 的， 因为在快门眼镜式 3D模式下， 奇数帧输出右目艮数据， 偶数帧输出左眼数 据或者奇数帧输出左眼数据，偶数帧输出右眼数据，也就是每一帧的数据都是 在变化的。举例来说：若原始数据的变化顺序为灰阶 100->灰阶 200->灰阶 100-> 灰阶 200, 若采用现有的过驱动方式， 则输出至显示面板的数据为灰阶 100-> 灰阶 250->灰阶 50->灰阶 250, 在输出第 2帧之后要输出第 3帧时， 第 2帧输 出至显示面板的为灰阶 250, 第 3帧要输出的原始数据为灰阶 100, 按照现有 的过驱动方式， 此时要在查找表中查找灰阶 200 ->灰阶 100对应的灰阶， 即 为灰阶 50, 因此输出为阶 100->灰阶 250->灰阶 50->灰阶 250, 但是这种比对 方式是不合理的，会造成驱动过头或驱动不足的问题， 达不到原本该显示的灰 阶。 此时应该在查找表中查找灰阶 250 ->灰阶 100对应的灰阶， 即在快门眼 镜式 3D模式下， 在影像数据发生变化时， 正确的比对方式是比对前一帧实际 输出至显示面板的灰阶值与后一帧预计要输出的原始灰阶值，而不是比对前一 帧的原始灰阶值与后一帧预计要输出的原始灰阶值。
因此， 本发明的示例性实施例提供一种过驱动方法， 如图 4所示， 该方法 包括下列步骤：
步骤 401 : 获取前一帧任一像素输出的实际灰阶值；
步骤 402: 获取当前帧对应像素待输出的原始灰阶值；
步骤 403: 根据所述前一帧任一像素输出的实际灰阶值和所述当前帧对应 像素待输出的原始灰阶值查找过驱动对照表，确定当前帧应当输出的实际灰阶 值。
可选择地，在过驱动对照表中存储从起始灰阶值变化至目标灰阶值所对应 的过驱动值。
可选择地， 步骤 403还可包括：
将前一帧任一像素输出的实际灰阶值作为起始灰阶值，将当前帧对应像素 待输出的原始灰阶值作为目标灰阶值， 查找所述过驱动对照表，将对应的过驱 动值作为当前帧应当输出的实际灰阶值。
本发明示例性实施例的过驱动方法，在影像数据发生变化时， 比对方式是 比对前一帧实际输出的灰阶值与后一帧预计要输出的原始灰阶值，使得在快门 目艮镜式 3D模式下， 不但能够加快液晶反应速度， 而且能确保输出至显示面板 的是正确的灰阶值， 不会出现驱动过头或驱动不足的问题，从而改善 3D 串扰 现象。
本发明示例性实施例还提供一种过驱动电路。如图 5所示， 该过驱动电路 包括：
存储模块 51 , 用于存储前一帧任一像素输出的实际灰阶值， 以及当前帧 对应像素待输出的原始灰阶值；
灰阶电压生成模块 52, 用于根据所述前一帧的实际灰阶值和所述当前帧 的原始灰阶值查找过驱动对照表， 确定当前帧应当输出的实际灰阶值。
可替换地， 存储模块 51还存储有过驱动对照表， 过驱动对照表中存储有 灰阶电压生成模块 52可用于将前一帧输出的实际灰阶值作为起始灰阶值, 将当前帧待输出的原始灰阶值作为目标灰阶值， 查找所述过驱动对照表，将对 应的过驱动值作为当前帧应当输出的实际灰阶值。
本发明实施例的过驱动电路，在影像数据发生变化时， 比对方式是比对前 一帧实际输出的灰阶值与后一帧预计要输出的原始灰阶值，使得在快门目艮镜式 3D模式下， 不但能够加快液晶反应速度， 并且能确保输出至显示面板的是正 确的灰阶值， 不会出现驱动过头或驱动不足的问题， 从而改善 3D 串扰现象。
下面结合图 5 对本发明示例性实施例的显示面板的过驱动方法及电路进 行详细介绍：
如图 5所示， 与现有技术相同， 第 1 帧的原始灰阶值会存储在存储模块 51中， 从第 2帧之后， 存储在存储模块 51中的不仅仅只有原始灰阶值， 还包 括实际输出至显示面板的实际灰阶值。在影像数据发生变化时， 比对任一像素 当前帧的原始灰阶值（即第 N帧的数据）与前一帧对应像素实际输出至显示 面板的灰阶值（即第 N，-l帧的数据）， 从而决定当前帧的该像素 T-con输出至 显示面板的灰阶值（即第 N，帧的数据）， 其中 N>1。 即在输出第 2帧灰阶值之 前， 将第 2帧的原始灰阶值与第 1帧的实际灰阶值比对， 通过查找表 (LUT)输 出第 2， 帧数据； 在输出第 3帧灰阶值之前， 将第 3 帧原始灰阶值与第 2， 帧 实际灰阶值比对， 通过查找表 (LUT)输出第 3， 帧灰阶值， 依此类推。 本发明 实施例的技术方案在影像数据发生变化时，比对方式是比对前一帧实际输出至 显示面板的灰阶值与后一帧预计要输出的原始灰阶值， 使得在快门眼镜式 3D 模式下， 不但能够加快液晶反应速度， 而且能确保输出至显示面板的是正确的 灰阶值， 不会出现驱动过头或驱动不足的问题， 从而改善 3D 串扰现象。
本发明的示例性实施例还提供一种显示面板， 包括上述的过驱动电路。 本发明的示例性实施例还提供一种显示装置， 包括上述的显示面板。所述 显示装置可以为： 手机、平板电脑、 电视机、显示器、笔记本电脑、数码相框、 导航仪等任何具有显示功能的产品或部件。
本说明书中所描述的许多功能部件都被称为模块，以便更加特别地强调其 实现方式的独立性。
本发明实施例中， 模块可以用软件实现， 以便由各种类型的处理器执行。 举例来说，一个标识的可执行代码模块可以包括计算机指令的一个或多个物理 或者逻辑块， 举例来说， 其可以被构建为对象、 过程或函数。 尽管如此， 所标 识模块的可执行代码无需物理地位于一起，而是可以包括存储在不同物理上的 不同的指令， 当这些指令逻辑上结合在一起时， 其构成模块并且实现该模块的 规定目的。
实际上， 可执行代码模块可以是单条指令或者是许多条指令， 并且甚至可 以分布在多个不同的代码段上， 分布在不同程序当中， 以及跨越多个存储器设 备分布。 同样地， 操作数据可以在模块内被识别， 并且可以依照任何适当的形 式实现并且被组织在任何适当类型的数据结构内。所述操作数据可以作为单个 数据集被收集， 或者可以分布在不同位置上（包括在不同存储设备上）， 并且 至少部分地可以仅作为电子信号存在于系统或网络上。
在模块可以利用软件实现时， 考虑到现有硬件工艺的水平， 所以可以以软 件实现的模块，在不考虑成本的情况下， 本领域技术人员都可以搭建对应的硬 件电路来实现对应的功能，所述硬件电路包括常规的超大规模集成电路或者门 阵列以及诸如逻辑芯片、 晶体管之类的现有半导体或者是其它分立的元件。模 块还可以用可编程硬件设备， 诸如现场可编程门阵列、 可编程阵列逻辑、 可编 程逻辑设备等实现。
在本发明各方法实施例中，所述各步骤的序号并不能用于限定各步骤的先 后顺序， 对各步骤的先后变化也在本发明的保护范围之内。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技 术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求 书
1. 一种过驱动方法， 包括下列步骤：
获取前一帧任一像素输出的实际灰阶值；
获取当前帧对应像素待输出的原始灰阶值；
根据所述前一帧任一像素输出的实际灰阶值和所述当前帧对应像素待输 出的原始灰阶值查找过驱动对照表， 确定当前帧应当输出的实际灰阶值。
2. 根据权利要求 1所述的过驱动方法， 其中， 在所述过驱动对照表中存
3. 根据权利要求 2所述的过驱动方法， 其中， 所述根据所述前一帧任一 像素输出的实际灰阶值和所述当前帧对应像素待输出的原始灰阶值查找过驱 动对照表， 确定当前帧应当输出的实际灰阶值的步骤包括：
将前一帧任一像素输出的实际灰阶值作为起始灰阶值，将当前帧对应像素 待输出的原始灰阶值作为目标灰阶值， 查找所述过驱动对照表，将对应的过驱 动值作为当前帧应当输出的实际灰阶值。
4. 一种过驱动电路， 包括：
存储模块， 用于存储前一帧任一像素输出的实际灰阶值， 以及当前帧对应 像素待输出的原始灰阶值；
灰阶电压生成模块，用于根据所述前一帧任一像素输出的实际灰阶值和所 述当前帧对应像素待输出的原始灰阶值查找过驱动对照表，确定当前帧应当输 出的实际灰阶值。
5. 根据权利要求 4所述的过驱动电路， 其中，
所述存储模块还用于存储所述过驱动对照表，所述过驱动对照表中存储有
6. 根据权利要求 5所述的过驱动电路， 其中，
所述灰阶电压生成模块用于将前一帧任一像素输出的实际灰阶值作为起 始灰阶值，将当前帧对应像素待输出的原始灰阶值作为目标灰阶值， 查找所述 过驱动对照表， 将对应的过驱动值作为当前帧应当输出的实际灰阶值。
7. 一种显示面板， 包括如权利要求 4-6中任一项所述的过驱动电路。
8. 一种显示装置， 包括如权利要求 7所述的显示面板。
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