CN113409743B - Column inversion driving method, column inversion driving device, display terminal, and storage medium - Google Patents
Column inversion driving method, column inversion driving device, display terminal, and storage medium Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
Abstract
The application belongs to the technical field of display panel, provides a row inversion driving method, row inversion drive arrangement, display terminal and storage medium, through to display panel's a plurality of data lines provide data signal, with to every row when the TFT component is opened subpixel charges, wherein, receive on the adjacent data line data signal's polarity is opposite, just data signal's polarity carries out polarity reversal processing with every 4n scanning pulse after 2 initial scanning pulses, can eliminate display panel's perpendicular bright and dark line has solved because the display surface that the long and short hand problem that the pixel wiring exists leads to among the display panel draws the problem of appearing the ripple.
Description
Technical Field
The present application belongs to the technical field of display panels, and in particular, relates to a column inversion driving method, a column inversion driving apparatus, a display terminal, and a storage medium.
Background
The HSD pixel array shares one data line by the left and right adjacent pixel units, so that the number of the data lines is reduced by half relative to the number of the data lines of the traditional liquid crystal driving pixel array. The adjacent pixel units in the same row are connected with different scanning lines, and the adjacent pixel units above and below are connected with different scanning lines, so that the number of the scanning lines is doubled relative to the number of the scanning lines of the traditional driving pixel array. In the liquid crystal display panel, after a dc voltage is applied to liquid crystal for a long time, liquid crystal molecules are polarized, and after the liquid crystal molecules are polarized, it is necessary to periodically change the polarity of a pixel electrode voltage in order to prevent the liquid crystal molecules from being polarized. The column inversion is used to change the polarity of alternate columns of pixel electrode voltages due to the minimum source driving power, with the same polarity on the same column and different polarities on adjacent columns. When the liquid crystal panel is driven by the column inversion method, the polarities of voltages of adjacent data lines are opposite, and the flicker phenomenon is reduced more than that of the frame inversion method after the luminance deviation is spatially averaged, and the lateral crosstalk is also reduced less than that of the frame inversion method.
However, to achieve the column driving and display effects, a winding method is required for the arrangement of the pixels in the array, and at this time, the wiring of the pixels has a problem of short or long, resulting in different charging capacitances of the pixels. When human eyes watch the picture in the display screen, the display picture can have ripples, and an obvious shaking grain phenomenon appears.
Disclosure of Invention
The embodiment of the application provides a column inversion driving method, a column inversion driving device, a display terminal and a storage medium, and aims to solve the problem that when the arrangement of array pixels adopts a winding mode, a display picture in a display screen is wavy, and an obvious shaking grain phenomenon appears.
In order to solve the above technical problem, a first aspect of the embodiments of the present application provides a column inversion driving method, which is applied to a display panel, where the display panel includes a plurality of sub-pixels arranged in a matrix, the plurality of sub-pixels arranged in the matrix include a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected to a plurality of scan lines in a one-to-one correspondence, and the plurality of pixel columns are respectively connected to a plurality of data lines in a one-to-one correspondence, and the column inversion driving method includes:
providing scanning signals to a plurality of scanning lines of the display panel to respectively open the TFT elements corresponding to the sub-pixels of each row;
providing data signals to a plurality of data lines of the display panel to charge the sub-pixels of each row when the TFT elements are turned on, wherein the polarities of the data signals received on adjacent data lines are opposite, and the polarity of the data signals is reversed every 4n scanning pulses after 2 scanning pulses are started to eliminate vertical bright and dark lines of the display panel, wherein n is a positive integer;
the surrounding area divided by the scanning line and the data line is a pixel group, each data line alternately loads data voltage to sub-pixels on two sides of the data line, and the sub-pixels connected with the data line are in a bow-shaped wiring structure;
the pixel group comprises a first sub-pixel and a second sub-pixel, the first sub-pixel is close to the connected data line, the second sub-pixel is far away from the connected data line, a first pixel group, a second pixel group and a third pixel group which are sequentially arranged from left to right in an odd-numbered row direction form a first routing structural unit, a fourth pixel group, a fifth pixel group and a sixth pixel group which are sequentially arranged from left to right in an even-numbered row direction form a second routing structural unit, the first routing structural unit and any one pixel group of the second routing structural unit respectively comprise 1 first TFT element and 1 second TFT element, the first end of the first TFT element is connected with the scanning line, the second end of the first TFT element is connected with the data line, the third end of the first TFT element is connected with the first sub-pixel, the first end of the second TFT element is connected with the scanning line, the second end of the second TFT element is connected with the data line, the third end of the second TFT element is connected with the second sub-pixel, and the third end of the second TFT element is connected with the second sub-pixel element, and the second sub-pixel element is shorter than the second sub-pixel element;
the scanning lines include upper scanning lines located on the upper portions of the first routing structure unit and the second routing structure unit and lower scanning lines located on the lower portions of the first routing structure unit and the second routing structure unit, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the second TFT element in sequence, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the lower scanning lines are the second TFT element, the first TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the lower scanning lines are the second TFT element and the second TFT element in sequence.
Optionally, the polarity of the data signals in each column in the 4n scan pulses is the same, and the polarity in the adjacent 4n scan pulses is opposite.
Optionally, the polarity of the data signal in each column in the first 2 scan pulses is the same.
Optionally, after starting 2 scan pulses, the polarity of the data signal is reversed every 4n scan pulses, including:
the polarity of the data signal in the first 2 scan pulses is opposite to the polarity in the 4n scan pulses adjacent to the data signal.
Optionally, the polarity of the data signal is reversed every 4n scan pulses after the first 2 scan pulses, including:
the polarity of the data signal in the nth column in the first 2 scanning pulses is positive, and the polarity of the data signal in the nth column in the 4N scanning pulses after the first pulse is negative.
Optionally, the polarity of the data signal is reversed every 4n scan pulses after the first 2 scan pulses, including:
the polarity of the data signal in the Nth column in the initial 2 scanning pulses is negative, and the polarity of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is positive; n is a positive integer.
Optionally, the voltage of the reference electrode connected to the sub-pixel is 7V;
the voltage of the data signal in the Nth column in the initial 2 scanning pulses is 12V, and the voltage of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is 2V; alternatively, the first and second electrodes may be,
the voltage of the data signal in the Nth column in the initial 2 scanning pulses is 2V, and the voltage of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is 12V; n is a positive integer.
The second aspect of the present application provides a column inversion driving device, which is applied to a display panel, the display panel includes a plurality of sub-pixels arranged in a matrix form, the plurality of sub-pixels arranged in the matrix form include a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected with a plurality of scanning lines in a one-to-one correspondence manner, the plurality of pixel columns are respectively connected with a plurality of data lines in a one-to-one manner, the column inversion driving device includes:
the scanning driving unit is used for providing scanning signals to a plurality of scanning lines of the display panel so as to respectively open the TFT elements corresponding to the sub-pixels of each row;
and the data driving unit is used for providing data signals to a plurality of data lines of the display panel so as to charge the sub-pixels of each row when the TFT elements are turned on, wherein the polarities of the data signals received on the adjacent data lines are opposite, and the polarity of the data signals is subjected to polarity inversion processing every 4n scanning pulses after the initial 2 scanning pulses so as to eliminate vertical bright and dark lines of the display panel, wherein n is a positive integer.
A third aspect of the application provides a display terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of the preceding claims when executing the computer program.
A fourth aspect of the application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method according to any one of the preceding claims.
In the embodiment of the application, data signals are provided for a plurality of data lines of the display panel to charge the sub-pixels of each row when the TFT elements are turned on, wherein the polarities of the data signals received on the adjacent data lines are opposite, and the polarity of the data signals is subjected to polarity inversion processing every 4n scanning pulses after the initial 2 scanning pulses, so that the vertical bright and dark lines of the display panel can be eliminated, and the problem of moire appearing on the display surface caused by the long and short-handed problem of the pixel connection in the display panel is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a long and short hand in a display panel driven by column inversion according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating an implementation of a column inversion driving method according to an embodiment of the present application;
FIG. 3 is a waveform diagram of a data signal in a conventional column inversion driving method and a waveform diagram of a data signal in the present embodiment in a 2+4 column inversion driving method;
FIG. 4 is a schematic diagram of a pixel array of a TFT-LCD display panel under a data signal waveform diagram of a 2+4 column inversion driving manner according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a column inversion driving apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a display terminal according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In order to explain the technical means of the present application, the following description will be given by way of specific examples.
Fig. 1 is a schematic structural diagram of a column inversion driving display panel according to an embodiment of the present disclosure. Referring to fig. 1, the display panel includes a plurality of sub-pixels arranged in a matrix, the plurality of sub-pixels includes a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected to the plurality of scan lines in a one-to-one correspondence, and the plurality of pixel columns are respectively connected to the plurality of data lines in a one-to-one correspondence.
In this embodiment, HSD (Half Source Driving) and column inversion Driving may be implemented by doubling the number of scan lines, and the number of corresponding data lines is reduced by Half, so that compared with a conventional display panel structure, the total number of signal lines in the display panel may be reduced, and the purpose of saving manufacturing cost is achieved by reducing the number of data line Driving chips, however, in order to implement HSD and column inversion Driving, the display panel needs to be arranged in a winding manner, as shown in fig. 1, a first sub-pixel and a second sub-pixel connected to a data line D1 form a pixel group unit, a plurality of pixel group units in the display panel are arranged in rows and columns, and polarities of adjacent pixel group units in the column direction are opposite, and each group of the double scan lines is located at two sides of each row of the pixel group unit. In this embodiment, each pixel group unit includes at least two sub-pixels, and the distance between the two sub-pixels in each pixel group unit and the data line D1 is different, for example, the first sub-pixel is closer to the data line D1, and the second sub-pixel is farther from the data line D1, that is, the sub-pixels have a significant long-short hand problem in the wiring arrangement, at this time, the storage capacitance (Cgs) in the first sub-pixel and the second sub-pixel is different, so that the brightness degree of the two adjacent sub-pixels is different, and macroscopically, the display image seen by human eyes may have bright and dark lines or a head-shaking pattern.
In order to solve the problem that bright and dark lines or a moving head pattern appear on a display screen, referring to fig. 2, a column inversion driving method provided in an embodiment of the present application includes step S10 and step S20.
In step S10, scanning signals are provided to a plurality of scanning lines of the display panel to respectively turn on TFT elements corresponding to each row of sub-pixels.
In step S20, data signals are provided to a plurality of data lines of the display panel to charge the sub-pixels of each row when the TFT elements are turned on, wherein polarities of the data signals received on adjacent data lines are opposite, and the polarity of the data signals is reversed every 4n scan pulses after the first 2 scan pulses to eliminate vertical bright and dark lines of the display panel, where n is a positive integer.
In this embodiment, a plurality of scan lines (i.e., gate lines connected to gates of TFTs) in the display panel are controlled by a scan driving unit, the data driving unit controls a plurality of data lines in the display panel to control a plurality of sub-pixels arranged in a matrix in the display panel, wherein the scan driving unit provides scan signals to respectively turn on TFT elements corresponding to each row of sub-pixels, the data driving unit provides data signals through the data lines to charge the sub-pixels in each row when the TFT elements are turned on, and performs polarity inversion processing on the polarity of the data signals every 4n scan pulses after the initial 2 scan pulses, and since the polarities of the data signals received on adjacent data lines are opposite, the positive and negative polarity inversion of the data signals on the data lines can break up regular vertical shaking marks caused by the charging difference of the sub-pixels into a grid, and at this time, a user can only visually see a slight grid mark, thereby avoiding an abnormal display picture caused by the vertical marks.
To better explain the improvement of the present application, in an embodiment of the method, n =1 is selected, that is, the polarity of the data signal is inverted every 4 scan pulses after the first 2 scan pulses, for example, and the waveform of the data signal and the polarity inversion relationship of the corresponding scan pulses are as shown in fig. 3.
Fig. 3 is a waveform diagram of a data signal in a conventional column inversion driving method and a waveform diagram of a data signal in a 2+4 column inversion driving method in this embodiment, and fig. 4 is a schematic diagram of a pixel array of a TFT-LCD display panel in a 2+4 column inversion driving method in this embodiment, specifically, referring to fig. 3 and 4, com is a reference voltage, rows (101, 102, 103, 104, 105, 106, 107, 108, 109 \8230 \ 8230) marked with 10 are scanning lines, and columns (N, N +1, N +2, N +3, N +4, N +5, N +6 \8230) \\ \ marked with N are data lines. The area surrounded by the scanning lines and the data lines is a pixel group. The polarity inversion results of the square wave data signals on the data lines are indicated as +, -in fig. 3.
In the conventional column inversion driving method, the actual waveform of the square wave data signal and the polarity inversion relationship of the corresponding scanning pulse are as shown in the upper graph of fig. 3, when a TFT element connected to a first row of scanning lines is turned on by a 101 scanning pulse, at this time, because the connection lengths of the sub-pixels correspondingly connected to the nth column of data lines and the sub-pixels correspondingly connected to the N +1 th column of data lines are different, the charging time of the adjacent sub-pixels is different due to the charging delay, and the corresponding pixel capacitances are different, then, because the polarities of the data signals on the nth column of data lines, the N +1 th column of data lines, and the N +2 th column of data lines are kept unchanged, the driving sequence of the scanning lines is unchanged, when the corresponding TFT element is turned on by a row scanning pulse, the voltage of the data signal received by the sub-pixel with a longer connection distance from the data lines does not reach a specified voltage, so that the luminance is weaker, while the voltage of the data signal received by the sub-pixel with a shorter connection distance from the data lines is normal or higher, so that the dark luminance of the sub-pixel is different, and the display panel appears as to have a wobbling number of dark lines.
In this embodiment, referring to fig. 4, a plurality of sub-pixels form a pixel matrix arranged in a matrix, a surrounding area partitioned by a scan line and a data line is a pixel group, a polarity of the data line is inverted once every 1 column, and a voltage loaded along the data line direction is inverted once every 4 scan pulses after an initial 2 scan pulses, specifically referring to the polarity diagram of fig. 4, after the initial 2 sub-pixels, every 4 sub-pixels have their polarities inverted once, each data line loads a data voltage to the sub-pixels on both sides of the data line alternately, since the data line is inverted in positive and negative polarities after every 4 scan pulses, a charging difference thereof can scatter regular vertical shaking patterns of the original sub-pixels due to a connection length into a grid pattern, so that a slight grid pattern can be seen by human eyes, and a display effect is greatly improved.
In one embodiment, the sub-pixels connected to the data lines are in a zigzag routing structure, as shown in fig. 4. The pixel group comprises a first sub-pixel and a second sub-pixel, the first sub-pixel is close to a connected data line, the second sub-pixel is far away from the connected data line, a first pixel group, a second pixel group and a third pixel group which are sequentially arranged from left to right in an odd row direction form a first wiring structure unit, a fourth pixel group, a fifth pixel group and a sixth pixel group which are sequentially arranged from left to right in an even row direction form a second wiring structure unit, any one of the first wiring structure unit and the second wiring structure unit comprises 1 first TFT element and 1 second TFT element, the first end of the first TFT element is connected with the scanning line, the second end of the first TFT element is connected with the data line, the third end of the first TFT element is connected with the first sub-pixel, the first end of the second TFT element is connected with the scanning line, the second end of the second TFT element is connected with the data line, the third end of the second TFT element is connected with the second sub-pixel, and the length of the third end of the first TFT element is smaller than that of the second TFT element;
the scanning lines comprise upper scanning lines positioned at the upper parts of the first routing structure unit and the second routing structure unit and lower scanning lines positioned at the lower parts of the first routing structure unit and the second routing structure unit, TFT elements connected with the scanning lines of the first pixel group, the second pixel group and the third pixel group are a first TFT element, a second TFT element and a second TFT element in sequence, TFT elements connected with the lower scanning lines of the first pixel group, the second pixel group and the third pixel group are a second TFT element, a first TFT element and a first TFT element in sequence, TFT elements connected with the scanning lines of the fourth pixel group, the fifth pixel group and the sixth pixel group are a first TFT element, a second TFT element and a first TFT element in sequence, and TFT elements connected with the lower scanning lines of the fourth pixel group, the fifth pixel group and the sixth pixel group are a second TFT element, a first TFT element and a second TFT element in sequence.
Specifically, the polarity of the voltage loaded along the data line direction is exchanged every 4 sub-pixels, for example, the data line N +1 is routed to the middle position of the second sub-pixel and the third sub-pixel from the start end, the 1 st sub-pixel and the 2 nd sub-pixel on the right side of the data line are connected to the data line N +1, the data line is routed to the left side position of the data line N +1 along the scanning line direction and is routed to the middle position of the 4 th sub-pixel and the 5 th sub-pixel along the data line direction, the data line is routed to the right side position of the data line N +1 along the scanning line direction and then is sequentially connected to the 5 th sub-pixel and the 6 th sub-pixel, the data line continues to run along the data line direction and sequentially circulates, the sub-pixels connected with the data line N +1 are inverted every 2 sub-pixel arrangement directions in the data line direction, and the complete bow-routing type layout is achieved.
Two consecutive sub-pixels have the same polarity when viewed from a row, the polarity of the next two consecutive sub-pixels is opposite to that of the first two sub-pixels, and so on, and the polarities of the voltages applied to the sub-pixels are inverted every two sub-pixels along the scan line direction, and the voltages applied to the sub-pixels are inverted every two sub-pixels along the data line direction, wherein + represents a positive voltage and-represents a negative voltage in fig. 4, and the polarity inversion can be represented as "+ - - - \ 8230 [ + - ] 30 [ - ]" + - ], or "+ - ] 8230 [ - ], and the polarity inversion can be represented as" + - - ] "+ - - - - - - - - - - + - ]" + - - + -, when viewed from a row.
In one embodiment, the plurality of pixel rows may be an arrangement of red, blue, and green sub-pixels in a row direction (scan line direction), the plurality of pixel columns may be the same in sub-pixels in a column direction (data line direction), the polarities of the sub-pixels in the row direction may be a positive polarity and a negative polarity arrangement or a negative polarity and a positive polarity arrangement, and the polarities of the sub-pixels in the column direction may be an arrangement of 2+ 4.
Specifically, the polarities of two adjacent sub-pixels in the same column direction are opposite, and the polarities of the sub-pixels with the same relative position are opposite between the adjacent pixel group units in the same column direction.
Specifically, in the same column direction, the polarities of the sub-pixels may be positive, negative and positive or arranged negative, positive and negative.
Specifically, in the same column direction, the polarities of the sub-pixels may be positive, negative and negative or arranged in an arrangement of negative, negative and positive.
The polarity of the data signals in each column in the 4n scan pulses is the same, and the polarity in the adjacent 4n scan pulses is opposite.
In one embodiment, referring to fig. 3, the polarity of the data signals in each column in the first 2 scan pulses is the same.
In one embodiment, in step S20, the polarity of the data signal is reversed every 4n scan pulses after the first 2 scan pulses, and the method includes: the polarity of the data signal in the first 2 scan pulses is opposite to the polarity of the data signal in the 4n scan pulses adjacent to the data signal.
In this embodiment, because the HSD drives the pixel arrangement of the panel structure, there are 2 adjacent sub-pixels in the same row of sub-pixels connected to the same data line, thereby resulting in long and short hand connection, therefore, in this embodiment, by setting the polarity in the first 2 scan pulses of the data signal to be the same, and the polarity in the first 2 scan pulses is opposite to the polarity in the adjacent 4n scan pulses, thereby forming the charging difference between the adjacent rows of sub-pixels, and by scattering the regular vertical moving striations, thereby eliminating the formation of the vertical moving striations caused by the continuous brightness in the direction of the data line.
In one embodiment, in step S20, the polarity of the data signal is subjected to polarity inversion processing every 4n scan pulses after the first 2 scan pulses, including: the polarity of the data signal in the Nth column in the initial 2 scanning pulses is positive, and the polarity of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is negative; n is a positive integer.
In this embodiment, referring to fig. 3, the polarity of the nth row of the data signals in the first 2 scan pulses is positive, the polarity of the nth row of the data signals in the 4N scan pulses after the start pulse is negative, correspondingly, the polarity of the (N + 1) th row of the data signals in the first 2 scan pulses is negative, the polarity of the (N + 1) th row of the data signals in the 4N scan pulses after the start pulse is positive, and so on.
In one embodiment, in step S20, the polarity of the data signal is subjected to polarity inversion processing every 4n scan pulses after the first 2 scan pulses, including: the polarity of the data signal in the Nth column in the initial 2 scanning pulses is negative, and the polarity of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is positive; n is a positive integer.
In this embodiment, the polarity of the nth column of the data signals in the first 2 scan pulses may be set to be a negative polarity, the polarity of the nth column of the data signals in the 4N scan pulses after the start pulse is a positive polarity, correspondingly, the polarity of the (N + 1) th column of the data signals in the first 2 scan pulses is a positive polarity, the polarity of the (N + 1) th column of the data signals in the 4N scan pulses after the start pulse is a negative polarity, and so on.
In one embodiment, in step S20, the voltage of the reference electrode connected to the sub-pixel is 7V; the voltage of the data signal in the Nth column in the initial 2 scanning pulses is 12V, and the voltage of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is 2V; or, the voltage of the data signal in the nth column in the first 2 scan pulses is 2V, and the voltage of the data signal in the nth column in the 4N scan pulses after the first pulse is 12V; n is a positive integer.
In this embodiment, the reference voltage connected to the sub-pixel is set to 7V, that is, the voltage of the com line in fig. 3 is set to 7V, the data voltage is set to 12V when the polarity of the data signal is positive, and the data voltage is set to 2V when the polarity of the data signal is negative.
The embodiment of the present application further provides a column inversion driving device, which is applied to a display panel, the display panel includes a plurality of sub-pixels arranged in a matrix shape, the plurality of sub-pixels arranged in the matrix shape include a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected with a plurality of scanning lines in a one-to-one correspondence manner, the plurality of pixel columns are respectively connected with a plurality of data lines in a one-to-one correspondence manner, as shown in fig. 5, the column inversion driving device 300 includes a scanning driving unit 301 and a data driving unit 302.
The scan driving unit 301 is configured to provide scan signals to a plurality of scan lines of the display panel to respectively turn on the TFT elements corresponding to each row of sub-pixels.
The data driving unit 302 is configured to provide data signals to a plurality of data lines of the display panel to charge the sub-pixels of each row when the TFT elements are turned on, wherein polarities of the data signals received on adjacent data lines are opposite, and the polarity of the data signals is reversed every 4n scan pulses after the first 2 scan pulses to eliminate vertical bright and dark lines of the display panel, where n is a positive integer.
In this embodiment, the scanning driving unit 301 controls a plurality of scanning lines (i.e. gate lines connected to gates of TFTs) in the display panel, and the data driving unit 302 controls a plurality of data lines in the display panel to control a plurality of sub-pixels arranged in a matrix in the display panel, wherein the scanning driving unit 301 provides scanning signals to respectively turn on TFT elements corresponding to each row of sub-pixels, the data driving unit 302 provides data signals through the data lines to charge the sub-pixels of each row when the TFT elements are turned on, and performs polarity inversion processing on the polarity of the data signals every 4n scanning pulses after the initial 2 scanning pulses, and since the polarities of the data signals received on adjacent data lines are opposite, the positive and negative polarity inversion of the data signals on the data lines can break up regular vertical shaking stripes caused by the charging difference of the sub-pixels into a grid shape, and at this time, a user can only see a macroscopic slight grid stripe on the display panel, thereby avoiding abnormal display caused by the vertical shaking stripes.
Further, in one embodiment, the timing control unit may further provide a first polarity inversion signal to control the polarity of the square wave data signal to be inverted once after 4 scan pulses.
The timing control unit also provides a second polarity inversion signal, so that the polarities of the data signals on the data lines respectively corresponding to the odd column pixels and the even column pixels are opposite at the same moment. And meanwhile, the grid lines with odd serial numbers are set to correspondingly control the conduction of the TFT elements of the pixel units in the even rows, and the grid lines with even serial numbers correspondingly control the conduction of the TFT elements of the pixel units in the odd rows.
The above-described polarity inversion operation can be specifically controlled by a polarity inversion signal. In this case, the HSD liquid crystal display device may further include a timing control unit. The timing control unit is used for providing timing control signals for the scanning driving unit and the data driving unit. The timing control signal includes two polarity inversion signals. The first polarity inversion signal is used for controlling the polarity of the square wave data signals on the data lines to be inverted once after 4n scanning periods (namely scanning pulses) pass, and the second polarity inversion signal is used for controlling the polarities of the square wave data signals on the data lines respectively corresponding to the odd-numbered rows of pixel units and the even-numbered rows of pixel units on the liquid crystal panel to be opposite at the same moment. It should be noted here that the first polarity inversion signal is not limited to be supplied to be inverted every 4n scanning periods. In fact, as described above, the timing control unit may send the polarity inversion control signal to the data driving unit 302 every 4n scan pulses, where n is an integer greater than or equal to 1, so that the polarity of the square wave data signal is inverted every odd number of scan pulses, thereby eliminating display defects such as vertical bright and dark lines. Here, in order to ensure the driving display effect, the value of n should not be too large, otherwise, the problem similar to that generated in the dc driving would be caused.
It should be noted that, for convenience and brevity of description, the specific working process of the driving apparatus 500 of the display panel described above may refer to the corresponding process of the method described in fig. 1 to fig. 4, and is not repeated herein.
Fig. 6 is a schematic diagram of a display terminal according to an embodiment of the present application. The display terminal 6 may include: a processor 63, a memory 61 and a computer program 62, such as a driver for a display panel, stored in said memory 61 and executable on said processor 63. The processor 63, when executing the computer program 62, implements the steps in the embodiments of the column inversion driving method described above, such as the steps S10 to S20 shown in fig. 1. Alternatively, the processor 63, when executing the computer program 62, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the units 301 to 302 shown in fig. 5.
The computer program may be divided into one or more modules/units, which are stored in the memory 61 and executed by the processor 63 to complete the application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the terminal.
The terminal can be a television, a smart phone, a desktop computer, a palm computer, a cloud server and other computing equipment with a display screen. The terminal may include, but is not limited to, a processor 63, a memory 61. Those skilled in the art will appreciate that fig. 6 is only an example of a display terminal and is not intended to be limiting and may include more or less components than those shown, or some components may be combined, or different components, for example, the terminal may also include input and output devices, network access devices, buses, etc.
The Processor 63 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 61 may be an internal storage unit of the terminal, such as a hard disk or a memory of the terminal. The memory 61 may also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory Card (SNC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are equipped on the terminal. Further, the memory 61 may also include both an internal storage unit and an external storage device of the terminal. The memory 61 is used for storing the computer program and other programs and data required by the terminal. The memory 61 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-Only memory (RON), random Access memory (RAN), electrical carrier wave signals, telecommunications signals, and software distribution media. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A column inversion driving method is applied to a display panel, the display panel comprises a plurality of sub-pixels which are arranged in a matrix shape, the plurality of sub-pixels which are arranged in the matrix shape comprise a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected with a plurality of scanning lines in a one-to-one correspondence mode, the plurality of pixel columns are respectively connected with a plurality of data lines in a one-to-one correspondence mode, and the column inversion driving method comprises the following steps:
providing scanning signals to a plurality of scanning lines of the display panel to respectively open the TFT elements corresponding to the sub-pixels of each row;
providing data signals to a plurality of data lines of the display panel to charge the sub-pixels of each row when the TFT elements are turned on, wherein the polarities of the data signals received on adjacent data lines are opposite, and the polarity of the data signals is subjected to polarity inversion processing every 4n scanning pulses after the initial 2 scanning pulses so as to eliminate vertical bright and dark lines of the display panel, wherein n is a positive integer;
the surrounding area divided by the scanning line and the data line is a pixel group, each data line alternately loads data voltage to sub-pixels on two sides of the data line, and the sub-pixels connected with the data line are in a bow-shaped wiring structure;
the pixel group comprises a first sub-pixel and a second sub-pixel, the first sub-pixel is close to the connected data line, the second sub-pixel is far away from the connected data line, a first pixel group, a second pixel group and a third pixel group which are sequentially arranged from left to right in an odd row direction form a first routing structural unit, a fourth pixel group, a fifth pixel group and a sixth pixel group which are sequentially arranged from left to right in an even row direction form a second routing structural unit, the first routing structural unit and any one of the pixel groups of the second routing structural unit respectively comprise 1 first TFT element and 1 second TFT element, the first end of the first TFT element is connected with the scanning line, the second end of the first TFT element is connected with the data line, the third end of the first TFT element is connected with the first sub-pixel, the first end of the second TFT element is connected with the scanning line, the second end of the second TFT element is connected with the data line, the third end of the second TFT element is connected with the first sub-pixel, and the length of the third end of the second TFT element is less than that of the second TFT element;
the scanning lines include upper scanning lines located on the upper portions of the first routing structure unit and the second routing structure unit and lower scanning lines located on the lower portions of the first routing structure unit and the second routing structure unit, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the second TFT element in sequence, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the lower scanning lines are the second TFT element, the first TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the lower scanning lines are the second TFT element and the second TFT element in sequence.
2. The column inversion driving method according to claim 1, wherein the polarity of the data signal in each column in the 4n scan pulses is the same, and the polarity in the adjacent 4n scan pulses is opposite.
3. The column inversion driving method according to claim 1, wherein the polarity of the data signal in each column in the first 2 scan pulses is the same.
4. The column inversion driving method according to claim 1, wherein the polarity of the data signal is subjected to polarity inversion processing every 4n scan pulses after the first 2 scan pulses, including:
the polarity of the data signal in the first 2 scan pulses is opposite to the polarity of the data signal in the 4n scan pulses adjacent to the data signal.
5. The column inversion driving method according to claim 1, wherein the polarity of the data signal is subjected to polarity inversion processing every 4n scan pulses after the first 2 scan pulses, including:
the polarity of the data signal in the nth column in the first 2 scanning pulses is positive, and the polarity of the data signal in the nth column in the 4N scanning pulses after the first pulse is negative.
6. The column inversion driving method according to claim 1, wherein the polarity of the data signal is subjected to polarity inversion processing every 4n scan pulses after the first 2 scan pulses, including:
the polarity of the data signal in the Nth column in the initial 2 scanning pulses is negative, and the polarity of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is positive; n is a positive integer.
7. The column inversion driving method according to claim 1, wherein a voltage of a reference electrode connected to the sub-pixel is 7V;
the voltage of the data signal in the Nth column in the initial 2 scanning pulses is 12V, and the voltage of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is 2V; alternatively, the first and second electrodes may be,
the voltage of the data signal in the Nth column in the initial 2 scanning pulses is 2V, and the voltage of the data signal in the Nth column in the 4N scanning pulses after the initial pulse is 12V; n is a positive integer.
8. A column inversion driving device is applied to a display panel, the display panel comprises a plurality of sub-pixels arranged in a matrix shape, the plurality of sub-pixels arranged in the matrix shape comprise a plurality of pixel rows and a plurality of pixel columns, the plurality of pixel rows are respectively connected with a plurality of scanning lines in a one-to-one correspondence manner, the plurality of pixel columns are respectively connected with a plurality of data lines in a one-to-one correspondence manner, and the column inversion driving device comprises:
the scanning driving unit is used for providing scanning signals to a plurality of scanning lines of the display panel so as to respectively open the TFT elements corresponding to the sub-pixels of each row;
a data driving unit, configured to provide data signals to a plurality of data lines of the display panel to charge the subpixels of each row when the TFT elements are turned on, where polarities of the data signals received on adjacent data lines are opposite, and the polarity of the data signals is reversed every 4n scan pulses after the initial 2 scan pulses to eliminate vertical bright and dark lines of the display panel, where n is a positive integer; the surrounding area divided by the scanning line and the data line is a pixel group, each data line alternately loads data voltage to sub-pixels on two sides of the data line, and the sub-pixels connected with the data line are in a bow-shaped wiring structure;
the pixel group comprises a first sub-pixel and a second sub-pixel, the first sub-pixel is close to the connected data line, the second sub-pixel is far away from the connected data line, a first pixel group, a second pixel group and a third pixel group which are sequentially arranged from left to right in an odd-numbered row direction form a first routing structural unit, a fourth pixel group, a fifth pixel group and a sixth pixel group which are sequentially arranged from left to right in an even-numbered row direction form a second routing structural unit, the first routing structural unit and any one pixel group of the second routing structural unit respectively comprise 1 first TFT element and 1 second TFT element, the first end of the first TFT element is connected with the scanning line, the second end of the first TFT element is connected with the data line, the third end of the first TFT element is connected with the first sub-pixel, the first end of the second TFT element is connected with the scanning line, the second end of the second TFT element is connected with the data line, the third end of the second TFT element is connected with the second sub-pixel, and the third end of the second TFT element is connected with the second sub-pixel element, and the second sub-pixel element is shorter than the second sub-pixel element;
the scanning lines include upper scanning lines located on the upper portions of the first routing structure unit and the second routing structure unit and lower scanning lines located on the lower portions of the first routing structure unit and the second routing structure unit, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the second TFT element in sequence, the TFT elements of the first pixel group, the second pixel group and the third pixel group connected to the lower scanning lines are the second TFT element, the first TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the upper scanning lines are the first TFT element, the second TFT element and the first TFT element in sequence, and the TFT elements of the fourth pixel group, the fifth pixel group and the sixth pixel group connected to the lower scanning lines are the second TFT element and the second TFT element in sequence.
9. A display terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the column inversion driving method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the column inversion driving method according to any one of claims 1 to 7.
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| KR101604140B1 (en) * | 2009-12-03 | 2016-03-17 | 엘지디스플레이 주식회사 | Liquid crystal display |
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| TW201019026A (en) * | 2008-11-14 | 2010-05-16 | Au Optronics Corp | Liquid crystal display and liquid crystal display panel thereof |
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