WO2013033928A1 - Lcd过激驱动方法、装置及液晶显示器 - Google Patents

Lcd过激驱动方法、装置及液晶显示器 Download PDF

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Publication number
WO2013033928A1
WO2013033928A1 PCT/CN2011/079813 CN2011079813W WO2013033928A1 WO 2013033928 A1 WO2013033928 A1 WO 2013033928A1 CN 2011079813 W CN2011079813 W CN 2011079813W WO 2013033928 A1 WO2013033928 A1 WO 2013033928A1
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Prior art keywords
grayscale value
frame image
overdrive
overdrive driving
liquid crystal
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PCT/CN2011/079813
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English (en)
French (fr)
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廖良展
林柏伸
谭小平
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深圳市华星光电技术有限公司
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Priority to US13/379,660 priority Critical patent/US8922596B2/en
Publication of WO2013033928A1 publication Critical patent/WO2013033928A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/18—Use of a frame buffer in a display terminal, inclusive of the display panel

Definitions

  • the invention relates to the field of liquid crystal driving technology, in particular to an LCD overdrive driving method, device and liquid crystal display.
  • the reaction time of the liquid crystal has always been a challenge in the LCD industry.
  • the phenomenon of moving image smear will have a great influence on the texture of the display screen. For example, when the image is converted from the previous frame to the next frame, the grayscale value of the image is increased, but because the liquid crystal reaction speed is slow, a longer reaction time is required, and the grayscale value of the image cannot be quickly reached. The expected brightness of the frame image.
  • the most common improvement method at present is to use the overdrive (Over Drive) mode, by correcting the grayscale value of the image of the next frame, finding the corresponding overdrive driving grayscale value, and converting it into an increased driving voltage, so that the voltage difference applied across the liquid crystal increases, thereby improving The response speed of the liquid crystal shortens the reaction time of the liquid crystal.
  • Over Drive Over Drive
  • the conventional LCD overdrive method stores the grayscale values of the pixels of the previous frame image in the timing controller, and stores the grayscale values of the pixels of the subsequent frame image in the scaling controller. Due to the large data of the image pixels, it is necessary to add an additional frame buffer to the timing controller and the zoom controller to store the entire frame image, which greatly increases the area of the PCB board. In addition, as the image pixels increase, the required storage space also increases, the capacity of the frame buffer is also higher, and the cost is also increased.
  • the main object of the present invention is to provide an LCD overdrive driving method, apparatus, and liquid crystal display that save storage space and save cost.
  • the invention provides an LCD overdrive driving method for improving LCD display quality and improving response speed, including steps:
  • the zoom controller receives the previous frame image grayscale value, and stores the previous frame image grayscale value in the frame buffer of the scaling controller;
  • the zoom controller receives the image grayscale value of the next frame, and sends the previous frame image grayscale value and the subsequent frame image grayscale value to the timing controller, where the timing controller queries the comparison table and outputs the overdrive driver Grayscale value.
  • the timing controller querying the lookup table and outputting the overdrive driving grayscale value further comprises the following steps:
  • the digital-to-analog converter converts the overdrive driving grayscale value into an overdrive driving voltage, and further comprises the following steps:
  • the overdrive driving voltage is output to the liquid crystal display panel to drive the liquid crystal response.
  • the scaling controller sends the previous frame image grayscale value and the subsequent frame image grayscale value to the timing controller through an LVDS data interface disposed between the scaling controller and the timing controller Complete the data transfer.
  • the invention also provides an LCD overdrive device, comprising:
  • a scaling controller configured to receive a grayscale value of a previous frame image and a grayscale value of a subsequent frame image
  • a frame buffer configured to store the grayscale value of the previous frame image
  • a timing controller configured to receive the previous frame image grayscale value and the subsequent frame image grayscale value sent by the scaling controller, query a comparison table, and output an overdrive driving grayscale value.
  • the timing controller comprises:
  • a grayscale value receiving module configured to receive the previous frame image grayscale value and the subsequent frame image grayscale value sent by the scaling controller
  • the comparison table query module is configured to query the comparison table, and output an overdrive driving grayscale value corresponding to the previous frame image grayscale value and the subsequent frame image grayscale value.
  • the LCD overdrive device further includes:
  • a digital-to-analog converter configured to receive the overdrive driving grayscale value sent by the timing controller, and convert the overdrive driving grayscale value into an overdrive driving voltage.
  • the digital to analog converter comprises:
  • An overdrive driving voltage conversion module configured to convert the overdrive driving grayscale value into an overdrive driving voltage by a D/A conversion method
  • the overdrive driving voltage output module is configured to output the overdrive driving voltage to the liquid crystal display panel to drive the liquid crystal response.
  • the timing controller receives the previous frame image grayscale value and the subsequent frame image grayscale value by using an LVDS data interface disposed between the scaling controller and the timing controller to complete data transmission.
  • the look-up table is built in the timing controller.
  • the look-up table is disposed outside the LCD overdrive device.
  • the invention also provides a liquid crystal display, comprising a liquid crystal display panel, further comprising:
  • the overdrive device is configured to receive an image grayscale value and output an overdrive voltage to the liquid crystal display panel.
  • the invention stores the grayscale value of the image of the previous frame of the previous frame image in the frame buffer instead of storing it in the timing controller, thereby avoiding the addition of the frame buffer in the timing controller, which can effectively save the cost; Only the image grayscale value of two pixels is stored, which avoids the storage space caused by the increase of image pixel data, which saves the storage space of the timing controller.
  • FIG. 1 is a flow chart of a method for driving an LCD overdrive according to the present invention
  • FIG. 2 is a flow chart showing the steps of outputting an overdrive driving gray scale value by a timing controller in the LCD overdrive driving method of the present invention
  • FIG. 3 is a schematic view of a comparison table in the LCD overdrive driving method of the present invention.
  • FIG. 4 is a flow chart showing the steps of outputting an overdrive voltage of a digital-to-analog converter in the LCD overdrive method of the present invention
  • FIG. 5 is a schematic structural view of an LCD overdrive device of the present invention.
  • FIG. 6 is a schematic structural diagram of a timing controller in an LCD overdrive device of the present invention.
  • FIG. 7 is a schematic structural view of an LCD overdrive device (provided with a digital-to-analog converter) according to the present invention.
  • FIG. 8 is a schematic structural view of a digital-to-analog converter in an LCD overdrive device of the present invention.
  • FIG. 9 is a schematic structural view of a liquid crystal display (including an overdrive device and a liquid crystal display panel) of the present invention.
  • FIG. 1 is a flow chart of a method for driving an LCD overdrive according to the present invention.
  • LCD overdrive method for improving LCD display quality and improving response speed including:
  • Step S10 The zoom controller receives the previous frame image grayscale value, and stores the previous frame image grayscale value in the frame buffer of the scaling controller.
  • the pixel data of the previous frame image is stored in the frame buffer of the scaling controller instead of being stored in the timing controller, thereby avoiding adding a frame buffer to the timing controller, which can effectively save the timing controller. storage.
  • Step S20 The zoom controller receives the image grayscale value of the next frame, and sends the previous frame image grayscale value and the subsequent frame image grayscale value to the timing controller, where the timing controller queries the comparison table and Output overdrive drive grayscale value.
  • the transmission of the grayscale value of the image is a transmission unit.
  • the scaling controller takes the previous frame from the frame buffer.
  • the image corresponds to the grayscale value of the pixel, and sends the grayscale value of the image of the two frames before and after to the timing controller.
  • only the image grayscale value of the two pixels is stored in the timing controller, and the timing controller does not need to add the frame again.
  • the cache saves costs.
  • the timing controller completes the overdrive driving grayscale value output, it immediately releases the grayscale value of the image in the storage space, and receives the grayscale value of the image of the two frames before and after the next pixel, thereby effectively avoiding the pixel data of storing the entire frame image.
  • the resulting storage space is insufficient, which saves the storage space of the timing controller.
  • FIG. 2 is a flow chart showing the steps of outputting the overdrive driving grayscale value by the timing controller in the LCD overdrive driving method shown in FIG. 1.
  • step S20 the step of querying the lookup table by using the timing controller and outputting the overdrive driving grayscale value includes:
  • Step S21 Receive the previous frame image grayscale value and the subsequent frame image grayscale value sent by the scaling controller.
  • the previous frame image grayscale value and the subsequent frame image grayscale value of the data transmission are completed by the LVDS data interface disposed between the scaling controller and the timing controller.
  • the grayscale value of the image is transmitted in units of pixels, and the grayscale value of the same pixel position of the frame image before and after the transmission is performed. Therefore, the timing controller stores only the grayscale value of two pixels at a time, thereby saving the storage space of the timing controller.
  • Step S22 Query the comparison table to obtain an overdrive driving grayscale value corresponding to the previous frame image grayscale value and the subsequent frame image grayscale value.
  • the timing controller is used to query the comparison table built in the timing controller (the comparison table can also be set in the memory outside the LCD overdrive device) to obtain the overdrive driving grayscale value.
  • the comparison table the previous frame image grayscale value and the subsequent frame image grayscale value of the same pixel position correspond to an overdrive driving grayscale value.
  • Step S23 outputting the overdrive driving grayscale value to a digital-to-analog converter, and the digital-to-analog converter converts the overdrive driving grayscale value into an overdrive driving voltage.
  • the gray-scale value of the overdrive image of the digital signal is converted into an overdrive voltage of the analog signal by the digital-to-analog converter, and the overdrive voltage is applied to both ends of the liquid crystal, and the overdrive voltage is larger than the original drive voltage. Speed up the liquid crystal reaction speed and shorten the liquid crystal reaction time.
  • FIG. 3 is a schematic diagram of a comparison table in the LCD overdrive driving method shown in FIG. 2.
  • the first column value is the grayscale value of the image of the previous frame
  • the first row value is the grayscale value of the image of the subsequent frame
  • the middle portion is the grayscale value of the overdrive.
  • the grayscale value of the image of the current frame is c
  • the grayscale value of the image of the latter frame is d
  • the value cd of the dth column of the cth row is queried, and the cd is the corresponding grayscale value of the overdrive
  • cd is the corresponding grayscale value of the overdrive
  • FIG. 4 is a flow chart showing the steps of outputting an overdrive voltage by a digital-to-analog converter in the LCD overdrive driving method shown in FIG. 2.
  • converting the overdrive driving grayscale value into the overdrive driving voltage by using the digital-to-analog converter includes:
  • Step S231 converting the overdrive driving grayscale value into an overdrive driving voltage by a D/A conversion method
  • Step S232 outputting the overdrive driving voltage to the liquid crystal display panel to drive the liquid crystal response.
  • the digital-to-analog converter converts the gray-scale value of the overdrive image in the form of a digital signal into an overdrive voltage of the analog signal, and loads the overdrive voltage to both ends of the liquid crystal, and the overdrive voltage is greater than the original drive voltage. It can speed up the liquid crystal reaction speed and shorten the liquid crystal reaction time.
  • FIG. 5 is a schematic structural diagram of an LCD overdrive device according to the present invention
  • FIG. 6 is a schematic structural diagram of a timing controller in the LCD overdrive device illustrated in FIG. 5
  • FIG. 7 is an LCD overdrive driven as shown in FIG. 5 .
  • FIG. 8 is a schematic structural view of the digital-to-analog converter of the LCD overdrive device shown in FIG.
  • the LCD overdrive device 100 of the present invention includes:
  • the zoom controller 10 is configured to receive a grayscale value of a previous frame image and a grayscale value of a subsequent frame image;
  • a frame buffer 11 configured to store the grayscale value of the previous frame image
  • the timing controller 20 is configured to receive the previous frame image grayscale value and the subsequent frame image grayscale value sent by the scaling controller 10, query a comparison table, and output an overdrive driving grayscale value.
  • the frame buffer 11 is disposed in the scaling controller 10, and the scaling controller 10 receives the pixel data of the previous frame image and stores it in the frame buffer 11 of the scaling controller 10, thereby avoiding the timing control.
  • the frame buffer is added to the device 20, which can effectively save the storage space of the timing controller 20.
  • the transmission of the grayscale value of the image is a transmission unit of one pixel.
  • the scaling controller 10 takes the previous frame from the frame buffer 11
  • the image corresponds to the grayscale value of the pixel, and the grayscale value of the image of the two frames before and after is sent to the timing controller 20.
  • the timing controller 20 does not need to Adding a frame buffer further saves costs.
  • the timing controller 20 completes the overdrive driving grayscale value output, the image grayscale value in the storage space is immediately released, and the image grayscale values of the two frames before and after the next pixel are received, thereby effectively avoiding the pixel due to storing the entire frame image.
  • the storage space caused by the data is insufficient, which saves the storage space of the timing controller 20.
  • the above timing controller 20 includes:
  • a grayscale value receiving module 21 configured to receive the previous frame image grayscale value and the subsequent frame image grayscale value sent by the scaling controller 10;
  • the comparison table querying module 22 is configured to query the comparison table, and output an overdrive driving grayscale value corresponding to the previous frame image grayscale value and the subsequent frame image grayscale value.
  • an LVDS data interface is disposed between the zoom controller 10 and the timing controller 20 for performing transmission of the grayscale value of the previous frame image and the grayscale value of the subsequent frame image.
  • the grayscale value of the image is transmitted in units of pixels, and the grayscale value of the same pixel position of the frame image before and after the transmission is performed, so that the timing controller 20 stores only the grayscale value of two pixels at a time, thereby saving the storage space of the timing controller 20.
  • the comparison table query module 22 accesses the external comparison table or queries the comparison table built in the timing controller 20 to obtain the overdrive driving grayscale value, and in the comparison table, the grayscale value of the previous frame image of the same pixel position And the grayscale value of the image of the latter frame corresponds to an overdrive driving grayscale value.
  • the LCD overdrive device 100 further includes:
  • the digital-to-analog converter 30 is configured to receive the overdrive driving grayscale value sent by the timing controller 20, and convert the overdrive driving grayscale value into an overdrive driving voltage.
  • the grayscale value of the overdrive image is a digital signal
  • the grayscale value of the overdrive image in the form of a digital signal is converted into an overdrive voltage of the analog signal, and is loaded to both ends of the liquid crystal, and the overdrive voltage is higher than the original driving voltage. Larger, it can speed up the liquid crystal reaction speed and shorten the liquid crystal reaction time.
  • the above digital-to-analog converter 30 includes:
  • the overdrive driving voltage conversion module 31 is configured to convert the overdrive driving gray scale value into an overdrive driving voltage by a D/A conversion method
  • the overdrive driving voltage output module 32 is configured to output the overdrive driving voltage to the liquid crystal display panel to drive the liquid crystal response.
  • the overdrive driving voltage conversion module 31 converts the overdrive driving image grayscale value in the form of a digital signal into an overdrive driving voltage of the analog signal, and the overdrive driving voltage output module 32 loads the overdrive driving voltage to both ends of the liquid crystal, overexciting The driving voltage is larger than the original driving voltage, which can speed up the liquid crystal reaction speed and shorten the liquid crystal reaction time.
  • the pixel data of the previous frame image is stored in the frame buffer 11 instead of being stored in the timing controller 20, which avoids adding a frame buffer to the timing controller 20, which can effectively save the timing controller 20. storage.
  • the scaling controller 10 transmits the grayscale values of the images of the two frames before and after to the timing controller 20, and only the timing controller 20 at this time By storing the image grayscale values of two pixels, the timing controller 20 does not need to add a frame buffer, which effectively saves cost.
  • the timing controller 20 completes the overdrive driving grayscale value output, the image grayscale value in the storage space is immediately released, and the image grayscale values of the two frames before and after the next pixel are received, thereby effectively avoiding the pixel due to storing the entire frame image.
  • the storage space caused by the data is insufficient, which saves the storage space of the timing controller 20.
  • FIG. 9 is a schematic structural view of a liquid crystal display (including an overdrive device and a liquid crystal display panel) according to the present invention.
  • the liquid crystal display of the embodiment of the present invention includes an overdrive device 100 that receives an image grayscale value and outputs an overdrive voltage to the liquid crystal display panel 200.
  • the overdrive device 100 includes a scaling controller 10, a frame buffer 11 of the scaling controller 10, a timing controller 20, and a digital to analog converter 30.
  • the scaling controller 10 receives the previous frame image grayscale value and stores it in the scaling controller 10.
  • the frame buffer 11, the scaling controller 10 further receives the image grayscale value of the next frame, and sends the previous frame image grayscale value and the subsequent frame image grayscale value to the timing controller 20 through the LVDS data interface,
  • the timing controller 20 obtains the overdrive driving gray scale value by querying the look-up table and outputs it to the digital-to-analog converter 30, which converts the overdrive driving gray scale value into an overdrive driving voltage and outputs it to the liquid crystal display panel 200.
  • the pixel data of the previous frame image is stored in the frame buffer 11 instead of being stored in the timing controller 20, which avoids adding a frame buffer to the timing controller 20, which can effectively save the timing controller 20. storage.
  • the scaling controller 10 transmits the grayscale values of the images of the two frames before and after to the timing controller 20, and only the timing controller 20 at this time By storing the image grayscale values of two pixels, the timing controller 20 does not need to add a frame buffer, which effectively saves cost.
  • the timing controller 20 completes the overdrive driving grayscale value output, the image grayscale value in the storage space is immediately released, and the image grayscale values of the two frames before and after the next pixel are received, thereby effectively avoiding the pixel due to storing the entire frame image.
  • the storage space caused by the data is insufficient, which saves the storage space of the timing controller 20.

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Abstract

一种LCD过激驱动方法、装置及液晶显示器。LCD过激驱动方法包括步骤：缩放控制器(10)接收前一帧图像灰阶值，并将其存储在缩放控制器(10)的帧缓冲器(11)中(S10)；缩放控制器(10)接收后一帧图像灰阶值，并将前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器(20)，供时序控制器(20)查询对照表并输出过激驱动灰阶值(S20)。将前一帧图像的前一帧图像灰阶值存储于帧缓冲器(11)中而非存储于时序控制器(20)中，避免了在时序控制器(20)中增加帧缓冲器(11)，可节约成本，并节约了时序控制器(20)的存储空间。

Description

LCD过激驱动方法、装置及液晶显示器
技术领域
本发明涉及到液晶驱动技术领域，特别涉及到LCD过激驱动方法、装置及液晶显示器。
背景技术
在LCD（Liquid Crystal Display，液晶显示器）驱动中，液晶的反应时间一直是LCD行业的一个挑战，特别是在动态图像的实现过程中，动态图像拖影现象将对显示器画面的质感产生很大的影响。例如，当图像由前一帧转换为下一帧时，图像的灰阶值增高，但由于液晶反应速度较慢，需要一个较长的反应时间，图像的灰阶值并不能快速的到达下一帧图像预期的亮度。为加快液晶的反应速度，目前最常用的改善方法是采用过激驱动(Over drive)方式，通过对后一帧图像的灰阶值进行修正，找到对应的过激驱动灰阶值，并将其转换成增加了的驱动电压，使加在液晶两端的电压差增大，进而提高液晶响应速度，缩短液晶的反应时间。
传统LCD过激驱动方法将前一帧图像各像素灰阶值存储于时序控制器内，将后一帧图像各像素灰阶值存储于缩放控制器内。因图像像素的数据较大，需要通过在时序控制器和缩放控制器上增加额外的帧缓存器去存储整个帧图像，会大大增加PCB电路板的面积。此外，当图像像素增大时，所需要的存储空间也随之增大，对帧缓存器的容量要求也更高，成本也会增加。
发明内容
本发明的主要目的为提供一种节省存储空间、节约成本的LCD过激驱动方法、装置及液晶显示器。
本发明提出一种LCD过激驱动方法，用于改善LCD显示质量，提高响应速度，包括步骤：
缩放控制器接收前一帧图像灰阶值，并将所述前一帧图像灰阶值存储在缩放控制器的帧缓存器中；
缩放控制器接收后一帧图像灰阶值，并将所述前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器，供所述时序控制器查询对照表并输出过激驱动灰阶值。
优选地，所述时序控制器查询对照表并输出过激驱动灰阶值还包括如下步骤：
接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
查询对照表，获得与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值；
输出所述过激驱动灰阶值到数模转换器，供所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压。
优选地，所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压还包括如下步骤：
通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
优选地，所述缩放控制器将所述前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器是通过设置于所述缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的。
本发明还提出一种LCD过激驱动装置，包括：
缩放控制器，用于接收前一帧图像灰阶值和后一帧图像灰阶值；
帧缓存器，用于存储所述前一帧图像灰阶值；
时序控制器，用于接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值，查询对照表并输出过激驱动灰阶值。
优选地，所述时序控制器包括：
灰阶值接收模块，用于接收缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
对照表查询模块，用于查询对照表，输出与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值。
优选地，所述LCD过激驱动装置还包括：
数模转换器，用于接收所述时序控制器发送的所述过激驱动灰阶值，并将所述过激驱动灰阶值转换成过激驱动电压。
优选地，所述数模转换器包括：
过激驱动电压转换模块，用于通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
过激驱动电压输出模块，用于将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
优选地，所述时序控制器接收所述前一帧图像灰阶值和后一帧图像灰阶值是通过设置于所述缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的。
优选地，所述对照表内置于所述时序控制器内部。
优选地，所述对照表设置于所述LCD过激驱动装置外部。
本发明还提出一种液晶显示器，包括液晶显示面板，还包括：
过激驱动装置，用于接收图像灰阶值，并输出过激驱动电压到液晶显示面板。
本发明将前一帧图像前一帧图像灰阶值存储于帧缓存器中而非存储于时序控制器中，避免了在时序控制器中增加帧缓存器，可有效节约成本；时序控制器内只存储两个像素的图像灰阶值，避免了因图像像素数据增加而造成的存储空间不够的现象，节约了时序控制器的存储空间。
附图说明
图1是本发明LCD过激驱动方法的流程图；
图2是本发明LCD过激驱动方法中时序控制器输出过激驱动灰阶值的步骤流程图；
图3是本发明LCD过激驱动方法中对照表的示意图；
图4是本发明LCD过激驱动方法中数模转换器输出过激驱动电压的步骤流程图；
图5是本发明LCD过激驱动装置的结构示意图；
图6是本发明LCD过激驱动装置中时序控制器的结构示意图；
图7是本发明LCD过激驱动装置（设置有数模转换器）的结构示意图；
图8是本发明LCD过激驱动装置中数模转换器的结构示意图；
图9是本发明液晶显示器（包括过激驱动装置与液晶显示面板）的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
参照图1，图1为本发明LCD过激驱动方法的流程图。LCD过激驱动方法，用于改善LCD显示质量，提高响应速度，包括：
步骤S10，缩放控制器接收前一帧图像灰阶值，并将所述前一帧图像灰阶值存储在缩放控制器的帧缓存器中。
本实施例将前一帧图像各像素数据存储于缩放控制器的帧缓存器中，而非存储于时序控制器中，避免了在时序控制器中增加帧缓存器，可有效节约时序控制器的存储空间。
步骤S20，缩放控制器接收后一帧图像灰阶值，并将所述前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器，供所述时序控制器查询对照表并输出过激驱动灰阶值。
本实施例中，图像灰阶值的传输是以一个像素为传输单位，当后一帧图像的一个像素的灰阶值到达缩放控制器时，缩放控制器从上述帧缓存器中取出前一帧图像对应像素的灰阶值，并将前后两帧图像的灰阶值发送至时序控制器，此时的时序控制器内只存储两个像素的图像灰阶值，时序控制器不需要再增加帧缓存器，有效节约了成本。同时，时序控制器完成过激驱动灰阶值输出后，立即释放存储空间内的图像灰阶值，并接收下一个像素前后两帧的图像灰阶值，有效避免了因存储整个帧图像的像素数据而造成的存储空间不够的现象，节约了时序控制器的存储空间。
参照图2，图2为图1所示LCD过激驱动方法中时序控制器输出过激驱动灰阶值的步骤流程图。在上述步骤S20中，利用所述时序控制器查询对照表并输出过激驱动灰阶值步骤包括：
步骤S21，接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值。
本实施例通过设置于缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的前一帧图像灰阶值和后一帧图像灰阶值。图像灰阶值以像素为单位进行传输，一次传输前后帧图像同一个像素位置的灰阶值，故时序控制器一次只存储两个像素的灰阶值，节约了时序控制器的存储空间。
步骤S22，查询对照表，获得与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值。
本实施例通过时序控制器查询时序控制器内置的对照表（对照表也可以设置在LCD过激驱动装置外的存储器中）获得过激驱动灰阶值。在对照表中，同一个像素位置的前一帧图像灰阶值和后一帧图像灰阶值对应于一个过激驱动灰阶值。
步骤S23，输出所述过激驱动灰阶值到数模转换器，供所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压。
本实施例通过数模转换器将数字信号形式的过激驱动图像灰阶值转换成模拟信号的过激驱动电压，并将过激驱动电压加载到液晶两端，过激驱动电压较原驱动电压更大，可加快液晶反应速度，缩短液晶反应时间。
参照图3，图3为图2所示LCD过激驱动方法中对照表的示意图。
本实施例的对照表中，第一列值为前一帧图像灰阶值，第一行值为后一帧图像灰阶值，中间部分值为过激驱动灰阶值。当前一帧图像灰阶值与后一帧图像灰阶值相同时，输出的过激驱动灰阶值与前一帧图像灰阶值和后一帧图像灰阶值相同；当前一帧图像灰阶值与后一帧图像灰阶值不同时，通过对照表查询前一帧图像灰阶值所在行与后一帧图像灰阶值所在列对应的过激驱动灰阶值。例如，当前一帧图像灰阶值为c、后一帧图像灰阶值为d时，则查询第c行第d列的值cd，该cd即为对应的过激驱动灰阶值，则将cd输出到数模转换器转换成对应的过激驱动电压，实现对驱动电压的改变，以改变液晶的反应时间，从而改善LCD液晶显示的质量。
参照图4，图4为图2所示LCD过激驱动方法中数模转换器输出过激驱动电压的步骤流程图。如图4所示，上述步骤S23中，利用所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压包括：
步骤S231，通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
步骤S232，将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
本实施例中，数模转换器将数字信号形式的过激驱动图像灰阶值转换成模拟信号的过激驱动电压，并将过激驱动电压加载到液晶两端，过激驱动电压较原驱动电压更大，可加快液晶反应速度，缩短液晶反应时间。
参照图5至图8，图5为本发明LCD过激驱动装置的结构示意图；图6为图5所示的LCD过激驱动装置中时序控制器的结构示意图；图7为图5所示LCD过激驱动装置（设置有数模转换器）的结构示意图；图8为图7所示的LCD过激驱动装置中数模转换器的结构示意图。
如图5所示，本发明的LCD过激驱动装置100，包括：
缩放控制器10，用于接收前一帧图像灰阶值和后一帧图像灰阶值；
帧缓存器11，用于存储所述前一帧图像灰阶值；
时序控制器20，用于接收所述缩放控制器10发送的所述前一帧图像灰阶值和后一帧图像灰阶值，查询对照表并输出过激驱动灰阶值。
本实施例中，帧缓存器11设置于所述缩放控制器10中，缩放控制器10接收前一帧图像各像素数据并存储于缩放控制器10的帧缓存器11中，避免了在时序控制器20中增加帧缓存器，可有效节约时序控制器20的存储空间。此外，图像灰阶值的传输是以一个像素为传输单位，当后一帧图像的一个像素的灰阶值到达缩放控制器10时，缩放控制器10从上述帧缓存器11中取出前一帧图像对应像素的灰阶值，并将前后两帧图像的灰阶值发送至时序控制器20，此时的时序控制器20内只存储两个像素的图像灰阶值，时序控制器20不需要再增加帧缓存器，有效节约了成本。同时，时序控制器20完成过激驱动灰阶值输出后，立即释放存储空间内的图像灰阶值，并接收下一个像素前后两帧的图像灰阶值，有效避免了因存储整个帧图像的像素数据而造成的存储空间不够的现象，节约了时序控制器20的存储空间。
如图6所示，上述时序控制器20包括：
灰阶值接收模块21，用于接收缩放控制器10发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
对照表查询模块22，用于查询对照表，输出与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值。
本实施例中，在缩放控制器10与时序控制器20之间设置有LVDS数据接口，用于完成前一帧图像灰阶值和后一帧图像灰阶值的传输。图像灰阶值以像素为单位进行传输，一次传输前后帧图像同一个像素位置的灰阶值，故时序控制器20一次只存储两个像素的灰阶值，节约了时序控制器20的存储空间。查询对照表时，通过对照表查询模块22访问外置对照表或查询时序控制器20内置的对照表获得过激驱动灰阶值，在对照表中，同一个像素位置的前一帧图像灰阶值和后一帧图像灰阶值对应于一个过激驱动灰阶值。
如图7所示，上述LCD过激驱动装置100还包括：
数模转换器30，用于接收所述时序控制器20发送的所述过激驱动灰阶值，并将所述过激驱动灰阶值转换成过激驱动电压。
本实施例中，过激驱动图像灰阶值为数字信号，需将数字信号形式的过激驱动图像灰阶值转换成模拟信号的过激驱动电压，并加载到液晶两端，过激驱动电压较原驱动电压更大，可加快液晶反应速度，缩短液晶反应时间。
如图8所示，上述数模转换器30包括：
过激驱动电压转换模块31，用于通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
过激驱动电压输出模块32，用于将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
本实施例中，过激驱动电压转换模块31将数字信号形式的过激驱动图像灰阶值转换成模拟信号的过激驱动电压，并由过激驱动电压输出模块32将过激驱动电压加载到液晶两端，过激驱动电压较原驱动电压更大，可加快液晶反应速度，缩短液晶反应时间。
本实施例中，前一帧图像各像素数据存储于帧缓存器11中而非存储于时序控制器20中，避免了在时序控制器20中增加帧缓存器，可有效节约时序控制器20的存储空间。此外，当后一帧图像的一个像素的灰阶值到达缩放控制器10时，缩放控制器10将前后两帧图像的灰阶值发送至时序控制器20，此时的时序控制器20内只存储两个像素的图像灰阶值，时序控制器20不需要再增加帧缓存器，有效节约了成本。同时，时序控制器20完成过激驱动灰阶值输出后，立即释放存储空间内的图像灰阶值，并接收下一个像素前后两帧的图像灰阶值，有效避免了因存储整个帧图像的像素数据而造成的存储空间不够的现象，节约了时序控制器20的存储空间。
参照图9，图9为本发明液晶显示器（包括过激驱动装置与液晶显示面板）的结构示意图。如图9所示，本发明实施例的液晶显示器，包括过激驱动装置100，接收图像灰阶值，并输出过激驱动电压到液晶显示面板200。
过激驱动装置100包括缩放控制器10、缩放控制器10的帧缓存器11、时序控制器20和数模转换器30，缩放控制器10接收前一帧图像灰阶值并存储于缩放控制器10的帧缓存器11，该缩放控制器10还接收后一帧图像灰阶值，并通过LVDS数据接口将前一帧图像灰阶值和后一帧图像灰阶值发送到时序控制器20，该时序控制器20通过查询对照表获得过激驱动灰阶值并输出到数模转换器30，该数模转换器30将过激驱动灰阶值转换成过激驱动电压并输出到液晶显示面板200。
本实施例中，前一帧图像各像素数据存储于帧缓存器11中而非存储于时序控制器20中，避免了在时序控制器20中增加帧缓存器，可有效节约时序控制器20的存储空间。此外，当后一帧图像的一个像素的灰阶值到达缩放控制器10时，缩放控制器10将前后两帧图像的灰阶值发送至时序控制器20，此时的时序控制器20内只存储两个像素的图像灰阶值，时序控制器20不需要再增加帧缓存器，有效节约了成本。同时，时序控制器20完成过激驱动灰阶值输出后，立即释放存储空间内的图像灰阶值，并接收下一个像素前后两帧的图像灰阶值，有效避免了因存储整个帧图像的像素数据而造成的存储空间不够的现象，节约了时序控制器20的存储空间。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (19)

  1. 一种LCD过激驱动方法，用于改善LCD显示质量，提高响应速度，其特征在于，包括步骤：
    缩放控制器接收前一帧图像灰阶值，并将所述前一帧图像灰阶值存储在缩放控制器的帧缓存器中；
    缩放控制器接收后一帧图像灰阶值，并将所述前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器，供所述时序控制器查询对照表并输出过激驱动灰阶值。
  2. 根据权利要求1所述的LCD过激驱动方法，其特征在于，所述时序控制器查询对照表并输出过激驱动灰阶值还包括如下步骤：
    接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
    查询对照表，获得与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值；
    输出所述过激驱动灰阶值到数模转换器，供所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压。
  3. 根据权利要求2所述的LCD过激驱动方法，其特征在于，所述数模转换器将所述过激驱动灰阶值转换成过激驱动电压还包括如下步骤：
    通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
    将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
  4. 根据权利要求1所述的LCD过激驱动方法，其特征在于，所述缩放控制器将所述前一帧图像灰阶值和后一帧图像灰阶值发送至时序控制器是通过设置于所述缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的。
  5. 一种LCD过激驱动装置，其特征在于，包括：
    缩放控制器，用于接收前一帧图像灰阶值和后一帧图像灰阶值；
    帧缓存器，用于存储所述前一帧图像灰阶值；
    时序控制器，用于接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值，查询对照表并输出过激驱动灰阶值。
  6. 根据权利要求5所述的LCD过激驱动装置，其特征在于，所述时序控制器包括：
    灰阶值接收模块，用于接收缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
    对照表查询模块，用于查询对照表，输出与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值。
  7. 根据权利要求5所述的LCD过激驱动装置，其特征在于，还包括：
    数模转换器，用于接收所述时序控制器发送的所述过激驱动灰阶值，并将所述过激驱动灰阶值转换成过激驱动电压。
  8. 根据权利要求7所述的LCD过激驱动装置，其特征在于，所述数模转换器包括：
    过激驱动电压转换模块，用于通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
    过激驱动电压输出模块，用于将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
  9. 根据权利要求5所述的LCD过激驱动装置，其特征在于，所述时序控制器接收所述前一帧图像灰阶值和后一帧图像灰阶值是通过设置于所述缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的。
  10. 根据权利要求5所述的LCD过激驱动装置，其特征在于，所述对照表内置于所述时序控制器内部。
  11. 根据权利要求5所述的LCD过激驱动装置，其特征在于，所述对照表设置于所述LCD过激驱动装置外部。
  12. 一种液晶显示器，包括液晶显示面板，其特征在于，还包括：
    过激驱动装置，用于接收图像灰阶值，并输出过激驱动电压到液晶显示面板。
  13. 根据权利要求12所述的液晶显示器，其特征在于，所述过激驱动装置包括：
    缩放控制器，用于接收前一帧图像灰阶值和后一帧图像灰阶值；
    帧缓存器，用于存储所述前一帧图像灰阶值；
    时序控制器，用于接收所述缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值，查询对照表并输出过激驱动灰阶值。
  14. 根据权利要求13所述的液晶显示器，其特征在于，所述时序控制器包括：
    灰阶值接收模块，用于接收缩放控制器发送的所述前一帧图像灰阶值和后一帧图像灰阶值；
    对照表查询模块，用于查询对照表，输出与所述前一帧图像灰阶值和后一帧图像灰阶值对应的过激驱动灰阶值。
  15. 根据权利要求13所述的液晶显示器，其特征在于，还包括：
    数模转换器，用于接收所述时序控制器发送的所述过激驱动灰阶值，并将所述过激驱动灰阶值转换成过激驱动电压。
  16. 根据权利要求15所述的液晶显示器，其特征在于，所述数模转换器包括：
    过激驱动电压转换模块，用于通过D/A转换方式将所述过激驱动灰阶值转换成过激驱动电压；
    过激驱动电压输出模块，用于将所述过激驱动电压输出到液晶显示面板，驱动液晶响应。
  17. 根据权利要求13所述的液晶显示器，其特征在于，所述时序控制器接收所述前一帧图像灰阶值和后一帧图像灰阶值是通过设置于所述缩放控制器与时序控制器之间的LVDS数据接口完成数据传输的。
  18. 根据权利要求13所述的液晶显示器，其特征在于，所述对照表内置于所述时序控制器内部。
  19. 根据权利要求13所述的液晶显示器，其特征在于，所述对照表设置于所述LCD过激驱动装置外部。
PCT/CN2011/079813 2011-09-06 2011-09-19 Lcd过激驱动方法、装置及液晶显示器 WO2013033928A1 (zh)

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