CN106205526B - Driving method for liquid crystal display panel, driving device and liquid crystal display device - Google Patents

Driving method for liquid crystal display panel, driving device and liquid crystal display device Download PDF

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Publication number
CN106205526B
CN106205526B CN201610567135.5A CN201610567135A CN106205526B CN 106205526 B CN106205526 B CN 106205526B CN 201610567135 A CN201610567135 A CN 201610567135A CN 106205526 B CN106205526 B CN 106205526B
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Prior art keywords
liquid crystal
crystal display
pixel
current line
driving
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CN106205526A (en
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国春朋
邹恭华
黄俊宏
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3614Control of polarity reversal in general

Abstract

The present invention relates to a kind of driving method for liquid crystal display panel, driving device and liquid crystal display devices.The driving method for liquid crystal display panel includes the following steps: (1) the pixel data for exporting each row;The pixel data of step 2, storage current line and previous adjacent rows;Step 3, the median for calculating current line pixel data average value and previous adjacent rows pixel data average value;Step 4, each sub-pixel charging within the off time before each sub-pixel charging to the current line according to the median to the current line;Step 5 successively charges to each sub-pixel of the current line according to the pixel data of the current line.The present invention also provides Liquid crystal display board driving mchanism and liquid crystal display devices.Driving method for liquid crystal display panel, driving device and liquid crystal display device of the invention can be effectively reduced charging pressure difference, so as to save the charging time and can reduce power consumption to a certain extent.

Description

Driving method for liquid crystal display panel, driving device and liquid crystal display device
Technical field
The present invention relates to field of liquid crystal more particularly to a kind of driving method for liquid crystal display panel, driving device and Liquid crystal display device.
Background technique
With the development of science and technology and the raising of people's quality of life, liquid crystal display device in life everywhere As it can be seen that and requirement of the people to liquid crystal display device it is higher and higher, start to pursue big display picture, fast response speed and Higher resolution ratio.
TFT (Thin Film Transistor, thin film transistor (TFT)) LCD, that is, thin film transistor LCD, is active square One of battle array type liquid crystal display (AM-LCD).Liquid crystal display, special TFT- LCD, be it is currently the only in brightness, it is right Display device than catching up in the comprehensive performances such as degree, power consumption, service life, volume and weight comprehensively and more than CRT, its performance are excellent It is good, large-scale production characteristic it is good, high degree of automation, the cost of raw material is cheap, and development space is wide, will rapidly become the new century Main product, be 21 century global economy increase a bright spot.Liquid crystal display is largely backlight liquid crystal display, It is made of liquid crystal display panel and backlight module (backlight module).General liquid crystal display panel includes coloured silk Colo(u)r filter (Color Filter, CF) substrate and thin-film transistor array base-plate.CF substrate is equipped with multiple colored filters And common electrode.Tft array substrate is equipped with a plurality of scan line parallel to each other, a plurality of data line parallel to each other, multiple thin Film transistor and pixel electrode.Currently, in order to extend the service life of liquid crystal, leading in thin-film transistor LCD device Often liquid crystal display panel is driven by the way of polarity reversion.In the LCD display using above-mentioned polarity inversion mode In drive circuit, control chip needs to control the source voltage of the every data line frequency between positive polarity voltage and reverse voltage Numerous switching will cause charging pressure difference larger in this way, be unfavorable for reducing the power consumption of liquid crystal display panel.
Small-size liquid-crystal display screen majority goes to drive by the way of demultiplexer (Demux) at present, framework such as Fig. 1 institute Show, Fig. 1 is existing panel driving demultiplexer circuit diagram.As shown in Figure 1, source electrode drives for common RGB panel Dynamic chip (Driver IC) holds every data line output that can be divided into three branches after buffer amplifier (Buffer), and leads to Three gating signal SELR, SELG, SELB control sequentials of front end are crossed, timesharing is sequentially output to three numbers of R, G, B sub-pixel According to line (Data Line), i.e. data line R1, G1, B1, data line R2, G2, B2 ..., the wherein timing of gating signal such as Fig. 2 institute Show.
Fig. 2 is existing panel gating signal time diagram, wherein on and off, the high level of CK signal control row The grid (Gate) of a line is opened, low level is closed, and for Fig. 1, CK signal controls Gate1, Gate2 ... row It is on and off, Gate1 sections of corresponding opening Gate1, Gate2 sections of corresponding opening Gate2 ...;SELR, SELG, SELB tri- The TFT that three data lines of R, G, B sub-pixel (R1, G1, B1, R2, G2, B2 ...) are corresponded in signal difference control figure 1 is opened With closing, with this come control whether give corresponding sub-pixel charging;Source electrode (Source) line is the output of chip (IC), i.e. Fig. 1 The output of middle Buffer.Successively controlling gating signal SELR, SELG and SELB in charging is high level, and then is successively opened R, TFT corresponding to G, B pixel electrode, to be filled with corresponding polar pixel voltage one by one to the pixel electrode.
As seen from Figure 2, when being progressively scanned, in every row Gate opening time, gating signal SELR, SELG, SELB meeting timesharing successively opens TFT corresponding to R, G, B pixel electrode for a period of time, and can also exist between three signals Certain interval (Blanking), with currently used full HD (FHD), rate (1080*1920) and 60Hz frame frequency are calculated respectively, The opening time of every row is about 8.7 microseconds, then the opening time of a gating signal (SELR, SELG or SELB) is about 2 Microseconds, and with the raising of panel resolution, this time can become fewer and fewer, so that can have undercharge The phenomenon that, it is inverted especially for row, that is, source driving chip controls the source voltage of every data line in positive polarity voltage The frequent switching between reverse voltage, sufficient and power consumption is more difficult to since two row data pressure differences of polar reversion are larger can be compared with Greatly.
To solve the above problems, needing a kind of new driving method for liquid crystal display panel.
Summary of the invention
Therefore, the purpose of the present invention is to provide a kind of driving method for liquid crystal display panel, to pixel quick charge and drop Low-power consumption.
Another object of the present invention is to provide a kind of Liquid crystal display board driving mchanism, to pixel quick charge and reduction function Consumption.
Still a further object of the present invention is to provide a kind of liquid crystal display device, to pixel quick charge and reduction power consumption.
To achieve the above object, the present invention provides a kind of driving method for liquid crystal display panel, comprising:
The pixel data of step 1, each row of output;
The pixel data of step 2, storage current line and previous adjacent rows;
Step 3, the median for calculating current line pixel data average value and previous adjacent rows pixel data average value;
Step 4, to the current line each sub-pixel charging before off time according to the median to the current line Each sub-pixel charging;
Step 5 successively charges to each sub-pixel of the current line according to the pixel data of the current line.
Wherein, the sub-pixel includes red sub-pixel, green sub-pixels and blue subpixels.
Wherein, the liquid crystal display panel is driven using row inversion mode.
Wherein, in this prior behavior the first row when, the pixel data of the previous adjacent rows is set as 0 volt.
To achieve the above object, the present invention also provides a kind of Liquid crystal display board driving mchanisms, comprising:
Source driving chip exports the pixel data of each row;
Storage unit stores the pixel data of current line and previous adjacent rows;
Computing unit calculates the centre of current line pixel data average value and previous adjacent rows pixel data average value Value;
Buffer amplifier respectively charges to the sub-pixel of each row according to the pixel data or median of each row;
When work, the buffer amplifier is within the off time before each sub-pixel charging to the current line according among this It is worth and charges to each sub-pixel of the current line, the following buffer amplifier is according to the pixel data of the current line successively to deserving Forward each sub-pixel charging.
Wherein, the sub-pixel includes red sub-pixel, green sub-pixels and blue subpixels.
Wherein, the liquid crystal display panel is driven using row inversion mode.
Wherein, in this prior behavior the first row when, the pixel data of the previous adjacent rows is set as 0 volt.
To achieve the above object, the present invention also provides a kind of liquid crystal display devices comprising above-mentioned liquid crystal display panel Driving device.
Wherein, the liquid crystal display device is driven using row inversion mode.
To sum up, driving method for liquid crystal display panel of the invention, driving device and liquid crystal display device can be effectively reduced Charge pressure difference, so as to save the charging time and can reduce power consumption to a certain extent.
Detailed description of the invention
With reference to the accompanying drawing, by the way that detailed description of specific embodiments of the present invention, technical solution of the present invention will be made And other beneficial effects are apparent.
In attached drawing,
Fig. 1 is existing panel driving demultiplexer circuit diagram;
Fig. 2 is existing panel gating signal time diagram;
Fig. 3 is the structural block diagram of one preferred embodiment of Liquid crystal display board driving mchanism of the present invention;
Fig. 4 is the time diagram of one preferred embodiment of Liquid crystal display board driving mchanism of the present invention;
Fig. 5 is the flow chart of one preferred embodiment of driving method for liquid crystal display panel of the present invention.
Specific embodiment
Referring to Fig. 3 and Fig. 4, Fig. 3 is the structural block diagram of one preferred embodiment of Liquid crystal display board driving mchanism of the present invention, Fig. 4 is the time diagram of preferred embodiment work.The Liquid crystal display board driving mchanism specifically includes that
Source driving chip 10 exports the pixel data of each row;
Storage unit 20 stores the pixel data of current line and previous adjacent rows;
Computing unit 30 calculates the centre of current line pixel data average value and previous adjacent rows pixel data average value Value;
Multiple Buffer (buffer amplifier) 40, according to the pixel data or median of each row respectively to the sub- picture of each row Element charges;
When work, Buffer 40 is within the off time before each sub-pixel charging to the current line according to the median Each sub-pixel charging to the current line, following Buffer 40 is according to the pixel data of the current line successively to the current line Each sub-pixel charging.
Liquid crystal display board driving mchanism of the invention comes in combination with existing panel driving demultiplexer circuit shown in FIG. 1 Understand, sub-pixel can be specially red sub-pixel R, green sub-pixels G and blue subpixels B;Liquid crystal display panel can be adopted It is driven with row inversion mode.
As shown in figure 3, circuit compared to the prior art, the present invention is between source driving chip 10 and Buffer 40 Increase storage unit 20 and computing unit 30.Wherein, storage unit 20 is used to store the pixel data of adjacent rows, which can Think current line and previous adjacent rows;In current behavior the first row, the pixel data of the previous adjacent rows can be set to pre- If value, such as 0V;Computing unit 30 is used to calculate the median S_mean of two row pixel data average values.Such as nth row of pixels Statistical average is 4V, and N+1 row pixel data average value is -6V, then S_mean=-1V.
To reduce the charging time and reducing power consumption, gating signal timing of the present invention is as shown in Figure 4.Wherein, it charges in every row The corresponding TFT switch of RGB is opened simultaneously into a period of time in preceding gap (Blanking) time, and is filled with S_mean value, such as Next black portions in figure are successively opened three switches again, are filled with corresponding voltage respectively, charged with this to be effectively reduced Time.And by power consumption formula P=1/2fCV2(wherein, f is charge frequency, and C is pixel capacitance, and V is charging pressure difference) can Pressure difference it is bigger, then power consumption is bigger, and the present invention can reduce pressure difference by way of precharge, to reduce power consumption.
In conjunction with Fig. 3 and Fig. 4 it is found that on the basis of the prior art of the present invention, the output side of source driving chip 10 is improved Method specially increases a storage unit 20 and computing unit 30 between the output of source driving chip 10 and the output of Buffer 40. Wherein storage unit 20 can store the pixel data value of adjacent rows;Computing unit 30 is used to two row pixels in calculating storaging unit The median of statistical average is simultaneously calculated as S_mean.The timing for changing selection signal at the same time, allows it to start in every row Three TFT switches in the off time in stage by SELR, SELG, SELB control open simultaneously a period of time, give RGB tri- The pixel electrode of sub-pixel is filled with S_mean simultaneously.It utilizes off time to be pre-charged with this, fills faster to reach Electric purpose.And charging pressure difference can be reduced by way of being pre-charged with two row data medians, charging power consumption is reduced with this. Following Buffer 40 is successively charged to each sub-pixel RGB of the current line according to the pixel data of the current line corresponding Pixel voltage.
The present invention also provides the liquid crystal display devices including above-mentioned Liquid crystal display board driving mchanism.
It is the flow chart of one preferred embodiment of driving method for liquid crystal display panel of the present invention referring to Fig. 5.Liquid of the invention LCD panel driving device and liquid crystal display device can work in the method.The driving method specifically includes that
The pixel data of step 1, each row of output;
The pixel data of step 2, storage current line and previous adjacent rows;
Step 3, the median for calculating current line pixel data average value and previous adjacent rows pixel data average value;
Step 4, to the current line each sub-pixel charging before off time according to the median to the current line Each sub-pixel charging;
Step 5 successively charges to each sub-pixel of the current line according to the pixel data of the current line.
To sum up, driving method for liquid crystal display panel of the invention, driving device and liquid crystal display device can be effectively reduced Charge pressure difference, so as to save the charging time and can reduce power consumption to a certain extent.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the appended right of the present invention It is required that protection scope.

Claims (8)

1. a kind of driving method for liquid crystal display panel characterized by comprising
The pixel data of step 1, each row of output;
The pixel data of step 2, storage current line and previous adjacent rows;
Step 3, the median for calculating current line pixel data average value and previous adjacent rows pixel data average value;
Step 4, to the current line each sub-pixel charging before off time according to the median to each of the current line Sub-pixel charging;
Step 5 successively charges to each sub-pixel of the current line according to the pixel data of the current line;
In this prior when behavior the first row, the pixel data of the previous adjacent rows is set as 0 volt.
2. driving method for liquid crystal display panel as described in claim 1, which is characterized in that the sub-pixel includes red sub- picture Element, green sub-pixels and blue subpixels.
3. driving method for liquid crystal display panel as described in claim 1, which is characterized in that the liquid crystal display panel is using row Inversion mode driving.
4. a kind of Liquid crystal display board driving mchanism characterized by comprising
Source driving chip exports the pixel data of each row;
Storage unit stores the pixel data of current line and previous adjacent rows;
Computing unit calculates the median of current line pixel data average value and previous adjacent rows pixel data average value;
Buffer amplifier respectively charges to the sub-pixel of each row according to the pixel data or median of each row;
When work, the buffer amplifier is within the off time before each sub-pixel charging to the current line according to the median pair Each sub-pixel of the current line charges, and the following buffer amplifier is according to the pixel data of the current line successively to the current line Each sub-pixel charging;
In this prior when behavior the first row, the pixel data of the previous adjacent rows is set as 0 volt.
5. Liquid crystal display board driving mchanism as claimed in claim 4, which is characterized in that the sub-pixel includes red sub- picture Element, green sub-pixels and blue subpixels.
6. Liquid crystal display board driving mchanism as claimed in claim 4, which is characterized in that the liquid crystal display panel is using row Inversion mode driving.
7. a kind of liquid crystal display device, which is characterized in that including Liquid crystal display board driving mchanism as claimed in claim 4.
8. liquid crystal display device as claimed in claim 7, which is characterized in that the liquid crystal display device uses row inversion mode Driving.
CN201610567135.5A 2016-07-18 2016-07-18 Driving method for liquid crystal display panel, driving device and liquid crystal display device Active CN106205526B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10777157B2 (en) 2018-05-31 2020-09-15 Wuhan China Star Optoelectronics Technology Co., Ltd. Liquid crystal display panel having pixel units with difference storage capacitance
CN108776401A (en) * 2018-05-31 2018-11-09 武汉华星光电技术有限公司 Pixel substrate, liquid crystal display panel and liquid crystal display
CN110599974B (en) * 2019-08-28 2021-08-06 南京中电熊猫液晶显示科技有限公司 Liquid crystal display device

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CN1598917A (en) * 2003-09-17 2005-03-23 夏普株式会社 Display device and its driving method
CN104282253A (en) * 2013-07-08 2015-01-14 硅工厂股份有限公司 Display driving circuit and display device
CN105047166A (en) * 2015-08-28 2015-11-11 深圳市华星光电技术有限公司 Drive method for liquid crystal display panel and liquid crystal display apparatus

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Publication number Priority date Publication date Assignee Title
CN1576973A (en) * 2003-07-22 2005-02-09 精工爱普生株式会社 Photoelectrical apparatus, driving method of photoelectric apparatus and electronic equipment
CN1598917A (en) * 2003-09-17 2005-03-23 夏普株式会社 Display device and its driving method
CN104282253A (en) * 2013-07-08 2015-01-14 硅工厂股份有限公司 Display driving circuit and display device
CN105047166A (en) * 2015-08-28 2015-11-11 深圳市华星光电技术有限公司 Drive method for liquid crystal display panel and liquid crystal display apparatus

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