CN102968971B - Liquid crystal display driving method, time sequence control device and liquid crystal display device - Google Patents
Liquid crystal display driving method, time sequence control device and liquid crystal display device Download PDFInfo
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- CN102968971B CN102968971B CN201210445054.XA CN201210445054A CN102968971B CN 102968971 B CN102968971 B CN 102968971B CN 201210445054 A CN201210445054 A CN 201210445054A CN 102968971 B CN102968971 B CN 102968971B
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Abstract
The invention discloses a liquid crystal display driving method, a time sequence control device and a liquid crystal display device and aims at improving liquid crystal response time in interlaced scanning and eliminating line residual images in display images. The liquid crystal display driving method includes receiving and storing data of the current frame of image; synthesizing a new current frame of image according to data of the current frame of image and data of the former frame of image; and comparing the new current frame of image and the former frame of image and outputting driving compensation data to drive liquid crystal to perform displaying.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of method for driving liquid crystal display, time sequence control device and liquid crystal display.
Background technology
Usually, liquid crystal indicator comprises the display panels and backlight that show for image.Display panels comprises liquid crystal panel again, supply unit, drive unit and time sequence control device.Time sequence control device converts the system end picture signal received the data-signal that drive unit can accept to.Drive unit control data signal to the pixel electrode charging on liquid crystal panel, shows corresponding picture line by line.
For promoting liquid crystal response speed, improving moving image quality, adding in time sequence control device and drive control (ODC, over driver control) function, record previous frame data with frame data buffer unit frame buffer.Relatively former frame and current frame data, exports offset data by look-up table LUT.
Display panels is progressive scan mode.When system end adopt 1080i(i series, staggered scanning) signal time, only have the System on Chip/SoC of 2D Di-interlace function be by spatial domain compensate realize full frame visual.Namely the even number line of odd-numbered frame is calculated by the data of upper and lower two odd-numbered lines; The odd-numbered line of even frame is calculated by the data of upper and lower two even number lines.When to show gridiron pattern picture always, as shown in Fig. 1 (a).In a line that black and white is had a common boundary, a field signal must be had to be that before and after utilizing, the signal of two row calculates, contrast in the middle of being formed, one is actual value, and one is offset, and two values are unequal, as shown in Figure 2; Wherein Fig. 2 (a) is the picture comprising multirow pixel that will show, and Fig. 2 (b) is the odd-numbered frame picture adopting above-mentioned technology to demonstrate, and Fig. 2 (c) is the even frame picture adopting above-mentioned technology to demonstrate, and the flagpole pattern wherein in diagram represents a pixel column; In Fig. 2 (b), (c), when making liquid crystal molecule positive and negative upset, driving voltage is asymmetric, is in bias state for a long time, causes liquid crystal molecule to polarize, and forms line image retention at black and white screen intersection; Final display result is as shown in Fig. 1 (b), and the line wherein in diagram represents a pixel column.
Summary of the invention
Embodiments provide a kind of method for driving liquid crystal display, liquid crystal display time sequence control device and display panels, for liquid crystal display interlace mode, the response speed of liquid crystal during to improve staggered scanning, eliminates the line image retention problem in display image.
A kind of method for driving liquid crystal display that the embodiment of the present invention provides, comprising:
Receive and store the data of current frame image;
According to the data of current frame image and the data of previous frame image, synthesize new current frame image;
New current frame image is compared with previous frame image, exports and drive offset data, show to drive liquid crystal.
A kind of liquid crystal display time sequence control device that the embodiment of the present invention provides, comprising:
The data of each two field picture for receiving and storing the data of each two field picture, and are sent to look-up table unit by frame data buffer unit;
Selector switch, for receiving the previous frame image data in current frame image data and frame data buffer unit, and according to the data of current frame image and the new current frame image of the Data Synthesis of previous frame image, and new current frame image is sent to look-up table unit;
Look-up table unit, for being compared with previous frame image by new current frame image, exports to drive liquid crystal to carry out the driving offset data shown.
A kind of liquid crystal display that the embodiment of the present invention provides, comprises above-mentioned liquid crystal display time sequence control device.
Technical scheme described in the embodiment of the present invention, according to the data of current frame image data and previous frame image, synthesizes new current frame image, and compare with previous frame image according to current frame image, export and drive offset data, improve liquid crystal response speed, eliminate line image retention problem.
Accompanying drawing explanation
The gridiron pattern picture of Fig. 1 (a) for showing;
Fig. 1 (b) is for adopting the line image retention picture of prior art display;
The picture that comprise multirow pixel of Fig. 2 (a) for showing;
The odd-numbered frame picture that Fig. 2 (b) demonstrates for adopting prior art;
The even frame picture that Fig. 2 (c) demonstrates for adopting prior art;
The schematic flow sheet of the method for driving liquid crystal display that Fig. 3 provides for the embodiment of the present invention;
The compensation data mode schematic diagram that Fig. 4 provides for the embodiment of the present invention;
The detail flowchart of the method for driving liquid crystal display that Fig. 5 provides for the embodiment of the present invention;
The odd-numbered frame picture that Fig. 6 (a) demonstrates for adopting technical scheme provided by the invention;
The even frame picture that Fig. 6 (b) demonstrates for adopting technical scheme provided by the invention;
The structural representation of a kind of liquid crystal display time sequence control device that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of method for driving liquid crystal display for liquid crystal display interlace mode, liquid crystal display time sequence control device and display panels, the response speed of liquid crystal during in order to improve staggered scanning, eliminates the line image retention problem of display image.
Data flow figure shown in Figure 3, a kind of method for driving liquid crystal display provided by the invention, comprising:
Frame data buffer unit receives and stores the data of current frame image, and selector switch accepts the data of current frame image simultaneously;
Selector switch, according to the data of current frame image and the data being stored in the previous frame image in frame data buffer unit, synthesizes new current frame image;
New current frame image compares with previous frame image by look-up table unit, and exports driving offset data, shows to drive liquid crystal.
Preferably, see Fig. 4, describedly synthesize new current frame image according to the data of current frame image and the data of previous frame image, adopt time domain compensation method, specifically comprise:
If current frame image is odd-numbered frame image, by the data of the data acquisition of each pixel of the even number line of current frame image by previous frame image same position, the data of the pixel of the odd-numbered line of current frame image remain unchanged, and obtain new current frame image;
If current frame image is even frame image, by the data of the data acquisition of each pixel of the odd-numbered line of current frame image by previous frame image same position, the data of the pixel of the even number line of current frame image remain unchanged, and obtain new current frame image.
Preferably, described new current frame image to be compared with previous frame image, exports and drive offset data, specifically comprise:
The change of the data of the data of each pixel of newer current frame image and the pixel of previous frame image same position;
According to described change, corresponding driving offset data is selected to export.
Below in conjunction with the drawings and specific embodiments, the present invention will be described.
In the present embodiment, data stream is low voltage differential data signal LVDS, turntable driving mode is staggered scanning, suppose that first the LVDS data scanned are even field LVDS data, second LVDS data is strange field LVDS data, see Fig. 5, the method for driving liquid crystal display that the embodiment of the present invention provides, comprising:
Step 101, receives even field LVDS data and the strange field LVDS data of present frame successively;
The LVDS data received are sent to selector switch and frame buffer unit by step 102;
Step 103, selector switch judges that present frame is odd-numbered frame, then continue step 104, judge that present frame is even frame, continues step 105; Particularly, there is the regular hour poor owing to receiving in a step 101 between even field LVDS data and strange field LVDS data, so in this step 103, selector switch just judges that present frame is odd-numbered frame or even frame after receiving the even field LVDS data of current frame image, and continues step 104 or 105;
Step 104, the even field LVDS data of previous frame image transferred by selector switch from frame data buffer unit, the i.e. LVDS data of each pixel of even number line, and the LVDS data of the LVDS data of each pixel in the even number line of this previous frame image as each pixel in the even number line of current frame image are exported, in the odd-numbered line of current frame image, the LVDS data of each pixel remain unchanged and export, thus obtain complete new current frame image; Meanwhile, previous frame image LVDS data are sent to look-up table unit by frame data buffer unit;
Concrete, the even field LVDS data of previous frame image transferred by selector switch from frame data buffer unit, and the even field LVDS data of these data as current frame image are carried out exporting look-up table unit to, strange field LVDS data remain unchanged, and directly export look-up table unit to;
It should be noted that, if present frame is the first frame, then selector switch directly adopts strange field LVDS data and the even field LVDS data of present frame, thus the first two field picture remains unchanged, and the data of the first two field picture are sent to look-up table unit;
Continue step 106;
Step 105, the LVDS data of each pixel of odd-numbered line of previous frame image transferred by selector switch from frame data buffer unit, and the LVDS data of the LVDS data of each pixel in the odd-numbered line of this previous frame image as each pixel in the odd-numbered line of current frame image are exported, in the even number line of current frame image, the LVDS data of each pixel remain unchanged and export, thus obtain complete new current frame image;
Concrete, the strange field LVDS data of previous frame image transferred by selector switch from frame data buffer unit, and the strange field LVDS data of these data as current frame image are carried out exporting look-up table unit to, even field LVDS data remain unchanged, and directly export look-up table unit to; Continue step 105;
Step 106, the change of the data of the pixel of each pixel and previous frame image same position in the current frame image that look-up table unit is newer;
Step 107, finds out corresponding driving offset data according to described change and exports; And then drive unit applies voltage according to this driving offset data to the pixel electrode on liquid crystal panel, shows in order to drive liquid crystal response.Same for the picture that will show in Fig. 2 (a), see Fig. 6 (a) and Fig. 6 (b), be respectively the image adopting technical solution of the present invention to obtain, wherein each flagpole pattern illustrated is with pixel column; Compared with Fig. 2, can find out that black and white intersection there will not be grey contiguous pixels row.
Particularly, the data of a pixel comprise its brightness that will show, and are generally in L0 ~ L255256 GTG.For same pixel, suppose that its brightness jumps to the L100 of current frame image from the L0 previous frame image, in a lookup table, suppose that driving bucking voltage corresponding to saltus step from L0 to L100 is 12.5V, then bucking voltage will be driven to drive liquid crystal according to this.
See Fig. 7, a kind of liquid crystal display time sequence control device that the embodiment of the present invention provides, comprising:
The data of each two field picture for receiving and storing the low voltage differential data signal data of each two field picture, and are sent to look-up table unit by frame data buffer unit Z101;
Selector switch Z102, for receiving the previous frame image data in current frame image data and frame data buffer unit, and according to the data of current frame image and the new current frame image of the Data Synthesis of previous frame image, and new current frame image is sent to look-up table unit;
Look-up table unit Z103, for being compared with previous frame image by new current frame image, exports to drive liquid crystal to carry out the driving offset data shown.
Preferably, the data of described selector unit according to current frame image and the data of previous frame image, synthesize new current frame image, specifically comprise:
If current frame image is odd-numbered frame image, by the data of the data acquisition of each pixel of the even number line of current frame image by previous frame image same position, the data of the pixel of the odd-numbered line of current frame image remain unchanged, and obtain new current frame image;
If current frame image is even frame image, by the data of the data acquisition of each pixel of the odd-numbered line of current frame image by previous frame image same position, the data of the pixel of the even number line of current frame image remain unchanged, and obtain new current frame image.
Preferably, described look-up table unit, specifically for:
The change of the data of the data of each pixel of newer current frame image and the pixel of previous frame image same position;
According to described change, corresponding driving offset data is selected to export.
A kind of liquid crystal display that the embodiment of the present invention provides, comprises described liquid crystal display time sequence control device.
In sum, a kind of method for driving liquid crystal display provided by the invention, time sequence control device and liquid crystal display, what utilize liquid crystal display time sequence control device crosses district's controlling functions and frame buffer unit, in conjunction with time domain compensation method, interleaved strange field and even field signal are superimposed as real progressive-scan signal, and namely the odd-line pixels value equivalence of even frame becomes former frame same position pixel value; The even rows value of even frame keeps present frame constant.The even rows value equivalence of odd-numbered frame becomes former frame same position pixel value; The odd-line pixels value of odd-numbered frame keeps present frame constant.Then by look-up table unit, offset data is exported.Technical solutions according to the invention, improve the corresponding speed of liquid crystal, solve the line image retention problem existed in 1080i and all interlace modes.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. a method for driving liquid crystal display, for the interlace mode of liquid crystal display, it is characterized in that, the method comprises:
Receive and store the data of current frame image;
If current frame image is odd-numbered frame image, by the data of the data acquisition of each pixel of the even number line of current frame image by previous frame image same position, the data of the pixel of the odd-numbered line of current frame image remain unchanged, and obtain new current frame image;
If current frame image is even frame image, by the data of the data acquisition of each pixel of the odd-numbered line of current frame image by previous frame image same position, the data of the pixel of the even number line of current frame image remain unchanged, and obtain new current frame image;
New current frame image is compared with previous frame image, exports and drive offset data, show to drive liquid crystal.
2. method according to claim 1, is characterized in that, is describedly compared with previous frame image by new current frame image, exports and drives offset data, specifically comprise:
The change of the data of the data of each pixel of newer current frame image and the pixel of previous frame image same position;
According to the change of described data, corresponding driving offset data is selected to export.
3. a liquid crystal display time sequence control device, for the interlace mode of liquid crystal display, is characterized in that, this device comprises:
The data of each two field picture for receiving and storing the data of each two field picture, and are sent to look-up table unit by frame data buffer unit;
Selector switch, for receiving the previous frame image data in current frame image data and frame data buffer unit, and according to the data of current frame image and the new current frame image of the Data Synthesis of previous frame image, and new current frame image is sent to look-up table unit;
Look-up table unit, for being compared with previous frame image by new current frame image, exports for driving liquid crystal to carry out the driving offset data shown.
4. liquid crystal display time sequence control device according to claim 3, is characterized in that, the data of described selector switch according to current frame image and the data of previous frame image, synthesizes new current frame image, specifically comprises:
If current frame image is odd-numbered frame image, by the data of the data acquisition of each pixel of the even number line of current frame image by previous frame image same position, the data of the pixel of the odd-numbered line of current frame image remain unchanged, and obtain new current frame image;
If current frame image is even frame image, by the data of the data acquisition of each pixel of the odd-numbered line of current frame image by previous frame image same position, the data of the pixel of the even number line of current frame image remain unchanged, and obtain new current frame image.
5. liquid crystal display time sequence control device according to claim 3, is characterized in that, described look-up table unit, specifically for:
The change of the data of the data of each pixel of newer current frame image and the pixel of previous frame image same position;
According to the change of described data, corresponding driving offset data is selected to export.
6. a liquid crystal display, is characterized in that, this liquid crystal display comprises the liquid crystal display time sequence control device as described in claim as arbitrary in claim 3 ~ 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103165092A (en) * | 2013-02-25 | 2013-06-19 | 京东方科技集团股份有限公司 | Method and device of liquid crystal display |
| CN104166614B (en) * | 2013-05-17 | 2017-12-15 | 腾讯科技（深圳）有限公司 | The frame per second detection method and relevant apparatus of a kind of mobile device |
| CN104183223B (en) * | 2014-07-04 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of display device, drive device and driving method |
| CN106935169B (en) * | 2015-12-31 | 2020-08-11 | 元太科技工业股份有限公司 | Electronic paper display device and driving method thereof |
| CN107342055B (en) * | 2017-07-21 | 2019-03-22 | 天津大学 | A kind of region backlight quickly regulating method for interlaced scanning video |
| CN108305591B (en) * | 2018-02-12 | 2020-06-26 | 京东方科技集团股份有限公司 | Display control method and display device |
| CN109831644B (en) * | 2018-12-19 | 2020-12-22 | 上海百涛电子系统工程有限公司 | Image remote transmission management platform |
| CN110189693B (en) * | 2019-06-11 | 2021-01-26 | 京东方科技集团股份有限公司 | Display driving method, display driver and display device |
| CN114333725B (en) * | 2020-08-09 | 2022-12-13 | 合肥奕斯伟集成电路有限公司 | Liquid crystal display, driving compensation method and driving compensation device thereof |
| CN112185295B (en) * | 2020-09-17 | 2024-01-30 | 北京集创北方科技股份有限公司 | Display driving method and device |
| CN111899682B (en) * | 2020-09-17 | 2023-03-24 | 北京集创北方科技股份有限公司 | Display driving method and device |
| CN112770125A (en) * | 2020-12-23 | 2021-05-07 | 深圳市尊正数字视频有限公司 | Method and system for low-delay display of live video and electronic equipment |
| CN113889049A (en) * | 2021-09-29 | 2022-01-04 | 歌尔科技有限公司 | Image display method, display terminal and readable storage medium |
| CN117253456B (en) * | 2023-09-18 | 2024-06-11 | 深圳市大我云读写科技有限公司 | Afterimage removal method, device, equipment and storage medium based on ink screen |
| CN118471157A (en) * | 2024-05-31 | 2024-08-09 | 北京显芯科技有限公司 | Backlight driving method, timing controller and display device |
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| JP2004212610A (en) * | 2002-12-27 | 2004-07-29 | Sharp Corp | Method and device for driving display device and program therefor |
| CN100520897C (en) * | 2006-04-04 | 2009-07-29 | 联詠科技股份有限公司 | Liquid crystal display capable of selecting interlaced scanning or progressive scanning driving and driving method |
| US8760476B2 (en) * | 2007-03-28 | 2014-06-24 | Sharp Kabushiki Kaisha | Liquid crystal display devices and methods for driving the same |
| KR20100073357A (en) * | 2008-12-23 | 2010-07-01 | 엘지디스플레이 주식회사 | Method and apparatus for processing video of liquid crystal display device |
| CN101594456B (en) * | 2009-02-18 | 2011-02-09 | 逐点半导体（上海）有限公司 | Image processing device and method |
| CN102074207B (en) * | 2009-11-20 | 2013-02-06 | 群康科技(深圳)有限公司 | Liquid crystal display |
| CN202275592U (en) * | 2011-10-19 | 2012-06-13 | 深圳市华星光电技术有限公司 | System for controlling over driver (OD) of liquid crystal display (LCD) |
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