CN109285523B - Driving system and driving method of liquid crystal display panel - Google Patents

Driving system and driving method of liquid crystal display panel Download PDF

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Publication number
CN109285523B
CN109285523B CN201811419951.7A CN201811419951A CN109285523B CN 109285523 B CN109285523 B CN 109285523B CN 201811419951 A CN201811419951 A CN 201811419951A CN 109285523 B CN109285523 B CN 109285523B
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liquid crystal
crystal display
picture
display panel
processing module
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CN109285523A (en
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常勃彪
温亦谦
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology Co Ltd
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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
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The invention provides a driving system of a liquid crystal display panel and a driving method of the liquid crystal display panel. The driving system of the liquid crystal display panel utilizes the picture value acquisition module to calculate the picture value of a picture to be displayed, the processing module determines the magnitude of the common voltage and the power supply voltage transmitted to the source electrode driver according to the picture value of the picture to be displayed, and particularly, when the picture value of the picture to be displayed is larger than the standard picture value, the common voltage and the power supply voltage output to the source electrode driver by the processing module are respectively larger than the common voltage and the power supply voltage output to the source electrode driver by the processing module when the picture value of the picture to be displayed is smaller than or equal to the standard picture value, so that the driving energy consumption is reduced and the product quality is improved while a plurality of sub-pixels of the liquid crystal display panel can be fully charged.

Description

Driving system and driving method of liquid crystal display panel
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving system and a driving method for a liquid crystal display panel.
Background
Liquid Crystal Display (LCD) devices have many advantages such as thin body, power saving, and no radiation, and are widely used. However, as the passive light emitting device of the lcd apparatus is well known, the liquid crystal material itself does not emit light, so most of the lcd apparatuses on the market are backlight type lcd, which includes a liquid crystal display panel and a backlight module (backlight module).
The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and the driving voltage is applied to the two glass substrates to control the liquid crystal molecules to change the direction, so that light rays of the backlight module are refracted out to generate a picture. Generally, a Liquid Crystal display panel includes a Color Filter (CF) substrate, a Thin Film Transistor (TFT) array substrate, a Liquid Crystal (LC) sandwiched between the Color Filter substrate and the TFT array substrate, and a Sealant frame (Sealant).
In order to reduce energy consumption for driving a liquid crystal display panel, in the prior art, a driving method for a liquid crystal display panel exists, the driving method receives display data and calculates a picture value (Input front total bits weight) of a picture to be displayed, the picture value is positively correlated with a voltage required by the liquid crystal display panel to display the picture to be displayed, the higher the voltage required to display the picture to be displayed is, the higher the picture value is, and conversely, the lower the picture value is. After obtaining the picture value of the picture to be displayed, comparing the picture value of the picture to be displayed with a preset standard picture value, if the picture value of the picture to be displayed is greater than the preset standard picture value, outputting a first high level voltage to a gate driver, otherwise, outputting a second high level voltage to the gate driver, wherein the first high level voltage is greater than the second high level voltage, so that the higher the picture value of the picture to be displayed is, the higher the high level voltage provided to the gate driver is, the higher the voltage output by the gate driver to a grid line of a liquid crystal display panel is, the more fully a thin film transistor in a pixel connected with the grid line can be turned on, a capacitor formed by a corresponding pixel electrode and a common electrode is fully charged, a good display effect can be obtained, and the lower the picture value of the picture to be displayed is, the lower the high level voltage provided to the gate driver is, the relatively low high level voltage is sufficient to display the frame to be displayed with a low frame value. Although the driving method can reduce the energy consumption for driving the liquid crystal display panel, the actual energy consumption reduction amount is very limited, and the effect of reducing the energy consumption is poor.
Disclosure of Invention
The invention aims to provide a driving system of a liquid crystal display panel, which can reduce driving energy consumption.
Another object of the present invention is to provide a driving method of a liquid crystal display panel, which can significantly reduce power consumption for driving the liquid crystal display panel.
In order to achieve the above object, the present invention first provides a driving system of a liquid crystal display panel, including a picture value obtaining module, a processing module electrically connected to the picture value obtaining module, and a source driver electrically connected to the processing module, wherein the source driver is electrically connected to the liquid crystal display panel;
the picture value acquisition module is used for accessing display data, calculating a picture value of a picture to be displayed and transmitting the picture value to the processing module;
the processing module is used for transmitting the common voltage and the power supply voltage to the source driver and determining the magnitude of the common voltage and the power supply voltage transmitted to the source driver according to the picture value of the picture to be displayed;
the source driver is used for accessing display data, generating a plurality of data voltages respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel according to the display data, the common voltage transmitted by the processing module and the power voltage, transmitting the plurality of data voltages to the sub-pixels corresponding to the liquid crystal display panel respectively, and transmitting the common voltage transmitted by the processing module to the plurality of sub-pixels of the liquid crystal display panel to drive the liquid crystal display panel.
The processing module receives a picture value of a picture to be displayed and then compares the picture value of the picture to be displayed with a preset standard picture value, when the picture value of the picture to be displayed is larger than the preset standard picture value, the processing module outputs a first public voltage and a first power supply voltage to the source electrode driver, otherwise, the processing module outputs a second public voltage and a second power supply voltage to the source electrode driver; the first common voltage is greater than the second common voltage, and the first power supply voltage is greater than the second power supply voltage.
The difference between the first power supply voltage and the second power supply voltage is equal to the difference between the first common voltage and the second common voltage.
The second power supply voltage is greater than the first common voltage.
The source driver generates a corresponding gamma curve according to the public voltage and the power voltage transmitted by the processing module, the source driver accesses display data to acquire a plurality of to-be-displayed gray scales corresponding to a plurality of sub-pixels of the liquid crystal display panel respectively, and a plurality of data voltages corresponding to the plurality of sub-pixels of the liquid crystal display panel respectively are obtained by utilizing the plurality of to-be-displayed gray scales and the gamma curve.
The invention also provides a driving method of the liquid crystal display panel, which comprises the following steps:
step S1, providing a driving system of the liquid crystal display panel and the liquid crystal display panel;
the driving system of the liquid crystal display panel comprises a picture value acquisition module, a processing module electrically connected with the picture value acquisition module and a source driver electrically connected with the processing module, wherein the source driver is electrically connected with the liquid crystal display panel;
step S2, the picture value acquisition module accesses the display data, calculates the picture value of the picture to be displayed and transmits the picture value to the processing module;
step S3, the processing module transmits the common voltage and the power voltage to the source driver, and determines the magnitude of the common voltage and the power voltage transmitted to the source driver according to the picture value of the picture to be displayed;
step S4, the source driver accesses the display data, generates a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the liquid crystal display panel according to the display data, the common voltage transmitted by the processing module, and the power voltage, transmits the plurality of data voltages respectively to the plurality of sub-pixels corresponding to the liquid crystal display panel, and transmits the common voltage transmitted by the processing module to the plurality of sub-pixels of the liquid crystal display panel to drive the liquid crystal display panel.
In step S3, the processing module compares the picture value of the picture to be displayed with a preset standard picture value after receiving the picture value of the picture to be displayed, and when the picture value of the picture to be displayed is greater than the preset standard picture value, the processing module outputs a first common voltage and a first power voltage to the source driver, otherwise, the processing module outputs a second common voltage and a second power voltage to the source driver; the first common voltage is greater than the second common voltage, and the first power supply voltage is greater than the second power supply voltage.
The difference between the first power supply voltage and the second power supply voltage is equal to the difference between the first common voltage and the second common voltage.
The second power supply voltage is greater than the first common voltage.
In step S4, the source driver generates a gamma curve according to the common voltage and the power voltage transmitted by the processing module, the source driver accesses the display data to obtain a plurality of to-be-displayed gray scales corresponding to the plurality of sub-pixels of the liquid crystal display panel, and obtains a plurality of data voltages corresponding to the plurality of sub-pixels of the liquid crystal display panel by using the plurality of to-be-displayed gray scales and the gamma curve.
The invention has the beneficial effects that: the driving system of the liquid crystal display panel utilizes the picture value acquisition module to calculate the picture value of a picture to be displayed, the processing module determines the magnitude of the common voltage and the power supply voltage transmitted to the source electrode driver according to the picture value of the picture to be displayed, and particularly, when the picture value of the picture to be displayed is larger than the standard picture value, the common voltage and the power supply voltage output to the source electrode driver by the processing module are respectively larger than the common voltage and the power supply voltage output to the source electrode driver by the processing module when the picture value of the picture to be displayed is smaller than or equal to the standard picture value, so that the driving energy consumption is reduced and the product quality is improved while a plurality of sub-pixels of the liquid crystal display panel can be fully charged. The driving method of the liquid crystal display panel can obviously reduce the energy consumption for driving the liquid crystal display panel.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic diagram of a driving system of a liquid crystal display panel according to the present invention;
FIG. 2 is a schematic diagram of gamma curves generated by a source driver of a driving system of a liquid crystal display panel according to the present invention;
FIG. 3 is a flowchart illustrating a driving method of a liquid crystal display panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, the present invention provides a driving system of a liquid crystal display panel, including a frame value obtaining module 10, a processing module 20 electrically connected to the frame value obtaining module 10, and a source driver 30 electrically connected to the processing module 20, wherein the source driver 30 is electrically connected to the liquid crystal display panel 1.
The image value obtaining module 10 is configured to access display data, calculate an image value of an image to be displayed, and transmit the image value to the processing module 20.
The processing module 20 is configured to transmit a common voltage and a power voltage to the source driver 30, and determine the common voltage and the power voltage transmitted to the source driver 30 according to a frame value of a frame to be displayed.
The source driver 30 is configured to access display data, generate a plurality of data voltages respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel 1 according to the display data, the common voltage transmitted by the processing module 20, and the power voltage, transmit the plurality of data voltages to the sub-pixels of the liquid crystal display panel 1, and transmit the common voltage transmitted by the processing module 20 to the plurality of sub-pixels of the liquid crystal display panel 1 to drive the liquid crystal display panel 1.
Specifically, the source driver 30 generates a corresponding gamma curve according to the common voltage and the power voltage transmitted by the processing module 20, the source driver 30 accesses the display data to obtain a plurality of to-be-displayed gray scales corresponding to the plurality of sub-pixels of the liquid crystal display panel 1, and obtains a plurality of data voltages corresponding to the plurality of sub-pixels of the liquid crystal display panel 1 by using the plurality of to-be-displayed gray scales and the gamma curve.
Specifically, in a preferred embodiment of the present invention, the processing module 20 compares the picture value of the picture to be displayed with a preset standard picture value after receiving the picture value of the picture to be displayed, and when the picture value of the picture to be displayed is greater than the preset standard picture value, the processing module 30 outputs the first common voltage VCOM1 and the first power voltage AVDD1 to the source driver 20, otherwise, the processing module 30 outputs the second common voltage VCOM2 and the second power voltage AVDD2 to the source driver 20. The first common voltage VCOM1 is greater than the second common voltage VCOM2, the first power voltage AVDD1 is greater than the second power voltage AVDD2, the standard common voltage VCOM0 corresponding to the standard gamma curve adopted by the conventional liquid crystal display panel is less than the first common voltage VCOM1 and greater than the second common voltage VCOM2, and the standard power voltage AVDD0 corresponding to the standard gamma curve adopted by the conventional liquid crystal display panel is less than the first power voltage AVDD1 and greater than the second power voltage AVDD 2. Preferably, the difference between the first power supply voltage AVDD1 and the second power supply voltage AVDD2 is equal to the difference between the first common voltage VCOM1 and the second common voltage VCOM 2. Preferably, the second power supply voltage AVDD2 is greater than the first common voltage VCOM 1.
Correspondingly, in the preferred embodiment of the present invention, after the source driver 30 receives the common voltage and the power voltage transmitted by the processing module 20 and is respectively the first common voltage VCOM1 and the first power voltage AVDD1, the source driver 30 generates a corresponding first gamma curve, please refer to fig. 2, the first gamma curve is shifted upward in the coordinate system of the gamma curve relative to the standard gamma curve adopted by the existing lcd panel, the source driver 30 receives the display data to obtain a plurality of to-be-displayed gray scales respectively corresponding to the plurality of sub-pixels of the lcd panel 1, obtains a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the lcd panel 1 by using the plurality of to-be-displayed gray scales and the first gamma curve, respectively transmits the plurality of data voltages to the plurality of sub-pixels of the lcd panel 1 and transmits the first common voltage VCOM1 to the plurality of sub-pixels of the lcd panel 1 to drive the lcd panel 1, the pixel capacitance of each sub-pixel can be ensured to be charged sufficiently. When the source driver 30 receives the common voltage and the power voltage transmitted by the processing module 20 and is respectively the second common voltage VCOM2 and the second power voltage AVDD2, the source driver 30 generates a corresponding second gamma curve, please refer to fig. 2, the second gamma curve is shifted downward in a coordinate system of the gamma curve relative to a standard gamma curve adopted by an existing liquid crystal display panel, the source driver 30 receives display data to obtain a plurality of to-be-displayed gray scales respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel 1, obtains a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the liquid crystal display panel 1 by using the plurality of to-be-displayed gray scales and the second gamma curve, respectively transmits the plurality of data voltages to the plurality of sub-pixels of the liquid crystal display panel 1 and transmits the second common voltage VCOM2 to the plurality of sub-pixels of the liquid crystal display panel 1 to drive the liquid crystal display panel 1, on the premise of ensuring normal display of the picture, the energy consumption of driving is reduced, and the display quality of the display device can be effectively improved.
In addition, in the prior art, the lcd panel generally includes a plurality of pixels arranged in an array, each pixel includes three sub-pixels arranged in sequence, the three sub-pixels are a red sub-pixel, a green sub-pixel and a blue sub-pixel, if the source driver drives the lcd panel in a dot inversion driving mode, that is, the polarities of the adjacent sub-pixels are opposite, when displaying a V-stripe (V-stripe) picture, the pixels in the same row of pixels alternately display black and white in sequence, when the red sub-pixel and the blue sub-pixel in the same pixel are positive and the green sub-pixel is negative, the common voltage is slightly pulled up, so that the voltage difference between the green sub-pixel and the common voltage is greater than the voltage difference between the red sub-pixel and the common voltage and the voltage difference between the blue sub-pixel and the common voltage, and the picture appears greenish, when the driving system of the liquid crystal display panel of the present invention is applied to the liquid crystal display panel with such a structure, the driving system of the liquid crystal display panel may further include a display frame detection module (not shown) electrically connected to the processing module 20, the display frame detection module also accesses the display data, transmits a prompt signal to the processing module 20 when the frame to be displayed is a V-stripe frame, the processing module 20 determines whether the source driver 30 drives the liquid crystal display panel 1 in a dot inversion manner after receiving the prompt signal, otherwise, does not operate, if so, reduces the magnitude of the common voltage output to the source driver 30, so that the common voltage output to the liquid crystal display panel 1 by the source driver 30 is reduced, cancels the pull-up of the common voltage to keep the common voltage at a normal level, or the processing module 20 directly controls the source driver 30 to drive the liquid crystal display panel 1 in a six-dot inversion manner, that the polarity of every two pixels is inverted once, thereby solving the problem that the displayed V-stripe picture is greenish.
Based on the same inventive concept, please refer to fig. 3, the invention further provides a driving method of a liquid crystal display panel, comprising the following steps:
step S1, please refer to fig. 1, providing a driving system of the liquid crystal display panel and the liquid crystal display panel 1.
The driving system of the liquid crystal display panel comprises a picture value acquisition module 10, a processing module 20 electrically connected with the picture value acquisition module 10, and a source driver 30 electrically connected with the processing module 20, wherein the source driver 30 is electrically connected with the liquid crystal display panel 1.
Step S2, the picture value obtaining module 10 accesses the display data, calculates the picture value of the picture to be displayed, and transmits the picture value to the processing module 20.
In step S3, the processing module 20 transmits the common voltage and the power voltage to the source driver 30, and determines the magnitude of the common voltage and the power voltage transmitted to the source driver 30 according to the frame value of the frame to be displayed.
Specifically, in the preferred embodiment of the present invention, in the step S3, the processing module 20 compares the picture value of the picture to be displayed with a preset standard picture value after receiving the picture value of the picture to be displayed, and when the picture value of the picture to be displayed is greater than the preset standard picture value, the processing module 30 outputs the first common voltage VCOM1 and the first power voltage AVDD1 to the source driver 20, otherwise, the processing module 30 outputs the second common voltage VCOM2 and the second power voltage vcodd 2 to the source driver 20. The first common voltage VCOM1 is greater than the second common voltage VCOM2, the first power voltage AVDD1 is greater than the second power voltage AVDD2, the standard common voltage VCOM0 corresponding to the standard gamma curve adopted by the conventional liquid crystal display panel is less than the first common voltage VCOM1 and greater than the second common voltage VCOM2, and the standard power voltage AVDD0 corresponding to the standard gamma curve adopted by the conventional liquid crystal display panel is less than the first power voltage AVDD1 and greater than the second power voltage AVDD 2. Preferably, the difference between the first power supply voltage AVDD1 and the second power supply voltage AVDD2 is equal to the difference between the first common voltage VCOM1 and the second common voltage VCOM 2. Preferably, the second power supply voltage AVDD2 is greater than the first common voltage VCOM 1.
In step S4, the source driver 30 accesses the display data, generates a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the liquid crystal display panel 1 according to the display data, the common voltage transmitted by the processing module 20, and the power voltage, transmits the plurality of data voltages to the plurality of sub-pixels of the liquid crystal display panel 1, and transmits the common voltage transmitted by the processing module 20 to the plurality of sub-pixels of the liquid crystal display panel 1 to drive the liquid crystal display panel 1.
Specifically, in the step S4, the source driver 30 generates a gamma curve corresponding to the common voltage and the power voltage transmitted by the processing module 20, the source driver 30 accesses the display data to obtain a plurality of to-be-displayed gray scales corresponding to the plurality of sub-pixels of the liquid crystal display panel 1, and obtains a plurality of data voltages corresponding to the plurality of sub-pixels of the liquid crystal display panel 1 by using the plurality of to-be-displayed gray scales and the gamma curve.
Specifically, in the preferred embodiment of the present invention, after the source driver 30 receives the common voltage and the power voltage transmitted by the processing module 20 and is respectively the first common voltage VCOM1 and the first power voltage AVDD1, the source driver 30 generates a corresponding first gamma curve, please refer to fig. 2, the first gamma curve is shifted upward in the coordinate system of the gamma curve relative to the standard gamma curve adopted by the existing lcd panel, the source driver 30 receives the display data to obtain a plurality of to-be-displayed gray scales respectively corresponding to the plurality of sub-pixels of the lcd panel 1, obtains a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the lcd panel 1 by using the plurality of to-be-displayed gray scales and the first gamma curve, transmits the plurality of data voltages respectively to the plurality of sub-pixels of the lcd panel 1 and transmits the first common voltage VCOM1 to the plurality of sub-pixels of the lcd panel 1 to drive the lcd panel 1, the pixel capacitance of each sub-pixel can be ensured to be charged sufficiently. When the source driver 30 receives the common voltage and the power voltage transmitted by the processing module 20 and is respectively the second common voltage VCOM2 and the second power voltage AVDD2, the source driver 30 generates a corresponding second gamma curve, please refer to fig. 2, the second gamma curve is shifted downward in a coordinate system of the gamma curve relative to a standard gamma curve adopted by an existing liquid crystal display panel, the source driver 30 receives display data to obtain a plurality of to-be-displayed gray scales respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel 1, obtains a plurality of data voltages respectively corresponding to the plurality of sub-pixels of the liquid crystal display panel 1 by using the plurality of to-be-displayed gray scales and the second gamma curve, respectively transmits the plurality of data voltages to the plurality of sub-pixels of the liquid crystal display panel 1 and transmits the second common voltage VCOM2 to the plurality of sub-pixels of the liquid crystal display panel 1 to drive the liquid crystal display panel 1, on the premise of ensuring normal display of the picture, the energy consumption of driving is reduced, and the display quality of the display device can be effectively improved.
In summary, the driving system of the liquid crystal display panel of the present invention utilizes the frame value obtaining module to calculate the frame value of the frame to be displayed, and the processing module determines the magnitude of the common voltage and the power voltage transmitted to the source driver according to the frame value of the frame to be displayed, specifically, when the frame value of the frame to be displayed is greater than the standard frame value, the common voltage and the power voltage output to the source driver by the processing module are respectively greater than the common voltage and the power voltage output to the source driver by the processing module when the frame value of the frame to be displayed is less than or equal to the standard frame value, so as to ensure that the plurality of sub-pixels of the liquid crystal display panel can be fully charged, reduce the driving energy consumption, and improve the quality of the product. The driving method of the liquid crystal display panel can obviously reduce the energy consumption for driving the liquid crystal display panel.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims (6)

1. The driving system of the liquid crystal display panel is characterized by comprising a picture value acquisition module (10), a processing module (20) electrically connected with the picture value acquisition module (10) and a source driver (30) electrically connected with the processing module (20), wherein the source driver (30) is electrically connected with the liquid crystal display panel (1);
the picture value acquisition module (10) is used for accessing display data, calculating the picture value of a picture to be displayed and transmitting the picture value to the processing module (20);
the processing module (20) is used for transmitting the common voltage and the power supply voltage to the source driver (30) and determining the magnitude of the common voltage and the power supply voltage transmitted to the source driver (30) according to the picture value of the picture to be displayed;
the source driver (30) is used for accessing display data, generating a plurality of data voltages respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel (1) according to the display data, the common voltage transmitted by the processing module (20) and the power voltage, respectively transmitting the plurality of data voltages to the sub-pixels corresponding to the liquid crystal display panel (1) and transmitting the common voltage transmitted by the processing module (20) to the plurality of sub-pixels of the liquid crystal display panel (1) to drive the liquid crystal display panel (1);
the processing module (20) compares a picture value of a picture to be displayed with a preset standard picture value after receiving the picture value of the picture to be displayed, when the picture value of the picture to be displayed is larger than the preset standard picture value, the processing module (20) outputs a first common voltage (VCOM1) and a first power supply voltage (AVDD1) to the source driver (30), otherwise, the processing module (20) outputs a second common voltage (VCOM2) and a second power supply voltage (AVDD2) to the source driver (30); the first common voltage (VCOM1) is greater than the second common voltage (VCOM2), the first supply voltage (AVDD1) is greater than the second supply voltage (AVDD 2);
the source driver (30) generates a corresponding gamma curve according to the common voltage and the power voltage transmitted by the processing module (20), the source driver (30) accesses display data to acquire a plurality of to-be-displayed gray scales corresponding to a plurality of sub-pixels of the liquid crystal display panel (1), and a plurality of data voltages corresponding to the plurality of sub-pixels of the liquid crystal display panel (1) are acquired by using the plurality of to-be-displayed gray scales and the gamma curve;
the driving system of the liquid crystal display panel further comprises a display picture detection module electrically connected with the processing module (20), the display picture detection module is also connected with display data, when a picture to be displayed is a V-stripe picture, a prompt signal is transmitted to the processing module (20), the processing module (20) judges whether the source driver (30) drives the liquid crystal display panel (1) in a point inversion mode after receiving the prompt signal, if not, the processing module does not act, if yes, the size of a public voltage output to the source driver (30) is reduced, or the processing module (20) directly controls the source driver (30) to drive the liquid crystal display panel (1) in a six-point inversion mode.
2. The driving system of the liquid crystal display panel as claimed in claim 1, wherein a difference between the first power voltage (AVDD1) and the second power voltage (AVDD2) is equal to a difference between the first common voltage (VCOM1) and the second common voltage (VCOM 2).
3. The driving system of the liquid crystal display panel of claim 1, wherein the second power supply voltage (AVDD2) is greater than the first common voltage (VCOM 1).
4. A driving method of a liquid crystal display panel is characterized by comprising the following steps:
step S1, providing a driving system of the liquid crystal display panel and the liquid crystal display panel (1);
the driving system of the liquid crystal display panel comprises a picture value acquisition module (10), a processing module (20) electrically connected with the picture value acquisition module (10) and a source driver (30) electrically connected with the processing module (20), wherein the source driver (30) is electrically connected with the liquid crystal display panel (1);
step S2, the picture value acquisition module (10) accesses the display data, calculates the picture value of the picture to be displayed and transmits the picture value to the processing module (20);
step S3, the processing module (20) transmits the common voltage and the power voltage to the source driver (30), and determines the magnitude of the common voltage and the power voltage transmitted to the source driver (30) according to the picture value of the picture to be displayed;
step S4, the source driver (30) accesses the display data, generates a plurality of data voltages respectively corresponding to a plurality of sub-pixels of the liquid crystal display panel (1) according to the display data, the common voltage transmitted by the processing module (20) and the power voltage, transmits the plurality of data voltages to the sub-pixels corresponding to the liquid crystal display panel (1) respectively, and transmits the common voltage transmitted by the processing module (20) to the plurality of sub-pixels of the liquid crystal display panel (1) to drive the liquid crystal display panel (1);
in the step S3, the processing module (20) compares the picture value of the picture to be displayed with a preset standard picture value after receiving the picture value of the picture to be displayed, and when the picture value of the picture to be displayed is greater than the preset standard picture value, the processing module (20) outputs a first common voltage (VCOM1) and a first power voltage (AVDD1) to the source driver (30), otherwise, the processing module (20) outputs a second common voltage (VCOM2) and a second power voltage (AVDD2) to the source driver (30); the first common voltage (VCOM1) is greater than the second common voltage (VCOM2), the first supply voltage (AVDD1) is greater than the second supply voltage (AVDD 2);
in the step S4, the source driver (30) generates a corresponding gamma curve according to the common voltage and the power voltage transmitted by the processing module (20), the source driver (30) accesses the display data to obtain a plurality of to-be-displayed gray scales corresponding to a plurality of sub-pixels of the liquid crystal display panel (1), and a plurality of data voltages corresponding to a plurality of sub-pixels of the liquid crystal display panel (1) are obtained by using the plurality of to-be-displayed gray scales and the gamma curve;
the driving system of the liquid crystal display panel further comprises a display picture detection module electrically connected with the processing module (20), the display picture detection module is also connected with display data, when a picture to be displayed is a V-stripe picture, a prompt signal is transmitted to the processing module (20), the processing module (20) judges whether the source driver (30) drives the liquid crystal display panel (1) in a point inversion mode after receiving the prompt signal, if not, the processing module does not act, if yes, the size of a public voltage output to the source driver (30) is reduced, or the processing module (20) directly controls the source driver (30) to drive the liquid crystal display panel (1) in a six-point inversion mode.
5. The method of driving a liquid crystal display panel according to claim 4, wherein a difference between the first power supply voltage (AVDD1) and the second power supply voltage (AVDD2) is equal to a difference between the first common voltage (VCOM1) and the second common voltage (VCOM 2).
6. The method of driving a liquid crystal display panel according to claim 4, wherein the second power supply voltage (AVDD2) is greater than the first common voltage (VCOM 1).
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