CN109686295A - Eliminate method, adjustment module and the display device of display panel vertical crosstalk - Google Patents
Eliminate method, adjustment module and the display device of display panel vertical crosstalk Download PDFInfo
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- CN109686295A CN109686295A CN201910151353.4A CN201910151353A CN109686295A CN 109686295 A CN109686295 A CN 109686295A CN 201910151353 A CN201910151353 A CN 201910151353A CN 109686295 A CN109686295 A CN 109686295A
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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Abstract
The present invention provides a kind of method for eliminating vertical crosstalk when display panel is shown, method includes: that the control terminal of successively N row pixel unit forward provides scanning cut-in voltage, provides the first gray scale voltage to the input terminal of all column pixel units；Successively scanning cut-in voltage is provided to N+1 row to the control terminal of N+a row pixel unit, the second gray scale voltage is provided to m column pixel unit to the input terminal of M+b column pixel unit, provides the first gray scale voltage to M+b+1 column pixel unit to the input terminal of column b pixel unit；Scanning cut-in voltage successively is provided to N+a+1 row to the control terminal of last line pixel unit, provides the first gray scale voltage to the input terminal of all column pixel units；Calculate the first difference between the first pixel voltage and the second pixel voltage, calculate the second difference between the second pixel voltage and third pixel voltage, whether the absolute value of the absolute value and the second difference that judge the first difference is respectively less than preset threshold, if it is not, then adjusting the closing voltage of display panel.
Description
Technical field
The present invention relates to field of display technology, and in particular, to the side of vertical crosstalk when for eliminating display panel display
Method, the adjustment module for executing the method and the display device including the adjustment module.
Background technique
With the continuous increase of the size of display panel, the problem of vertical crosstalk (V Crosstalk), is also more obvious.It is existing
Have in technology, described hang down is reduced using closing voltage (VGL) mode for the thin film transistor (TFT) (TFT) for manually adjusting pixel unit
The problem of straight crosstalk, but the prior art has the disadvantage in that
1) due to the influence of fluctuations of the manufacture craft of display panel, lead to the thin of the display panel pixel unit of different batches
The closing voltage-regulation amount of film transistor is different, therefore, manually adjusts the side of the closing voltage of the thin film transistor (TFT) of pixel unit
Formula will be adjusted individually for the display panel of different batches, increase human cost and inefficiency；
2) change since the closing voltage of the thin film transistor (TFT) of pixel unit can vary with temperature, but the prior art
In, the standard of the temperature-compensating of the closing voltage of the thin film transistor (TFT) of pixel unit is difficult to define, causes compensation effect bad.
Therefore, how to the closing voltage of display panel carry out efficiently, applicability preferably adjust, to eliminate described hang down
The problem of straight cross-interference issue becomes urgent need to resolve.
Summary of the invention
The purpose of the present invention is to provide a kind of for eliminating described in the method for vertical crosstalk when display panel is shown, execution
The adjustment module of method and display device including the adjustment module.It is described to eliminate vertical crosstalk when display panel is shown
Method adaptively can carry out dynamic regulation by the closing voltage to the display panel with different temperatures characteristic, improve vertical string
The effect for disturbing problem is more preferable, and the scope of application is wider, and human cost lowers, and efficiency improves.
In order to solve the above-mentioned technical problem, as one aspect of the invention, one kind is provided and is shown for eliminating display panel
When vertical crosstalk method, the display panel include be arranged as A row B column multiple pixel units, wherein the method packet
It includes:
S1, successively the control terminal of N row pixel unit provides scanning cut-in voltage, the input to all column pixel units forward
End provides the first gray scale voltage；
S2, it is successively provided to N+1 row to the control terminal of N+a row pixel unit and scans cut-in voltage, to m column pixel unit
Input terminal to M+b column pixel unit provides the second gray scale voltage, to M+b+1 column pixel unit to column b pixel unit
Input terminal provide the first gray scale voltage, wherein second gray scale voltage be higher than first gray scale voltage, acquire c row
The pixel voltage of d column pixel unit is denoted as the first pixel voltage, when e row pixel unit is opened, acquisition e row f column
The pixel voltage of pixel unit is denoted as the second pixel voltage, wherein and M, N, a, b, c, d, e, f are positive integer, and are to quantify,
And c < N, M < d < (M+b), (N+1) < e < (N+a), (M+b+1) < f < B；
S3, it is successively provided to N+a+1 row to the control terminal of last line pixel unit and scans cut-in voltage, to all column pictures
The input terminal of plain unit provides the first gray scale voltage, and the pixel voltage of acquisition g row d column pixel unit is denoted as third pixel electricity
Pressure, wherein g is positive integer, and is quantitative, (N+a+1) < g < A；
The first difference between S4, calculating first pixel voltage and second pixel voltage, calculates described second
The second difference between pixel voltage and the third pixel voltage judges the absolute value of first difference and described second poor
Whether the absolute value of value is respectively less than preset threshold,
If it is not, then adjusting the closing voltage of the display panel, and step S1 to step S4 is repeated, until described the
Until the absolute value of the absolute value of one difference and second difference is respectively less than the preset threshold, wherein to the pixel
Before the control terminal offer scanning cut-in voltage of unit and after scanning cut-in voltage is provided, the control terminal to the pixel unit
The closing voltage is provided.
Preferably, the step of adjusting the closing voltage of the display panel include:
Determine adjusting direction, the direction that adjusts is selected from described in increase by the first adjusting direction for closing voltage and reduction
Close voltage second adjusts one of direction；
The closing voltage is adjusted according to determining adjusting direction.
Preferably, described determining the step of adjusting direction, includes:
It receives and is closed in the period of voltage in the control terminal of pixel unit, adjust direction according to first and adjust the pass
Close voltage；
Re-execute the steps S1 to step S3, and execute calculated in step S4 first difference and calculate it is described second poor
The step of value；
Judge to increase it is described close first difference after voltage and whether be less than increase described the closed before voltage
One difference, and whether second difference is less than before increasing the closing voltage after the increase closing voltage described second is poor
Value, if so, determining that described first adjusts direction for the adjusting direction, if not, it is determined that second adjusting direction is institute
It states and adjusts direction.
Preferably, B=2M+b, A=2N+a+1.
Preferably, the N is the display panel whole pixel unit line numberExtremelyThe M is the display panel
Whole pixel unit columnsExtremelyThe c is the display panel whole pixel unit line numberExtremelyThe g is
The display panel whole pixel unit line numberExtremely
The d is the display panel all pixels unit columnsExtremely
Preferably, the corresponding grayscale of first gray scale voltage is 0 grade~127 grades, and second gray scale voltage is corresponding
Grayscale is 128 grades~255 grades.
As the second aspect of the present invention, provide a kind of for eliminating the adjusting mould of vertical crosstalk when display panel is shown
Block, the display panel include the multiple pixel units for being arranged as A row B column, wherein the adjustment module includes drive control list
Member, calculates judging unit and power conditioning unit at voltage acquisition unit,
The drive control unit is used to control the drive element of the grid for driving the display panel and drives the display
The source drive unit of panel provides signal according to following rule:
Successively the control terminal of N row pixel unit provides scanning cut-in voltage, the source electrode to the drive element of the grid forward
Driving unit provides the first gray scale voltage to the input terminal of all column pixel units；
The drive element of the grid successively provides scanning cut-in voltage, institute to N+1 row to the control terminal of N+a row pixel unit
It states input terminal of the source drive unit to m column pixel unit to M+b column pixel unit and the second gray scale voltage is provided, while to
The input terminal of M+b+1 column pixel unit to column b pixel unit provides the first gray scale voltage, wherein the second grayscale electricity
Pressure is higher than first gray scale voltage, and the voltage acquisition unit is used to acquire the pixel voltage note of c row d column pixel unit
Make the first pixel voltage, when e row pixel unit is opened, the voltage acquisition unit is for acquiring e row f column pixel list
The pixel voltage of member is denoted as the second pixel voltage,
Wherein, M, N, a, b, c, d, e, f are positive integer, and are quantitative, and c < N, M < d < (M+b), (N+1) < e
< (N+a), (M+b+1) < f < B；
The drive element of the grid successively provides scanning to the control terminal of last line pixel unit to N+a+1 row and opens electricity
Pressure, the source drive unit provide the first gray scale voltage, the voltage acquisition unit to the input terminal of all column pixel units
Pixel voltage for acquiring g row d column pixel unit is denoted as third pixel voltage, wherein g is positive integer, and be it is quantitative,
(N+a+1) < g < A；
The judging unit that calculates is used to calculate first between first pixel voltage and second pixel voltage
Difference calculates the second difference between second pixel voltage and the third pixel voltage, judges first difference
Whether absolute value and the absolute value of second difference are respectively less than preset threshold,
The power conditioning unit is used for the out-put supply control letter when the judging result for calculating judging unit is no
Number, the power control signal is for controlling the closing voltage that power module adjusts the display panel, wherein the grid drives
Moving cell is used for before providing scanning cut-in voltage to the control terminal of the pixel unit and after providing scanning cut-in voltage,
The closing voltage is provided to the control terminal of the pixel unit.
Preferably, the calculating judging unit includes or door, first comparator and the second comparator,
The first comparator will be calculated for receiving first pixel voltage and second pixel voltage
First difference export to described or door,
Second comparator will be calculated for receiving second pixel voltage and the third pixel voltage
Second difference export to described or door,
Described or door is used at least have one in the absolute value of first difference and the absolute value of second difference
Person exports enable signal when being greater than the preset threshold；
The power conditioning unit is for exporting the power control signal, the electricity when receiving the enable signal
Source controls signal and closes voltage change predetermined amplitude for controlling.
Preferably, power conditioning unit includes analyzing subelement and compensation subelement,
The analysis subelement adjusts the adjusting direction for closing voltage for determining, the adjusting direction, which is selected from, to be increased
The first adjusting direction for closing voltage and the reduction closing voltage regulation two adjust one of direction；
The compensation subelement is used to export corresponding power control signal according to determining adjusting direction, described in control
The closing voltage of display panel described in electric power source pair of module is adjusted.
As third aspect of the present invention, a kind of display device is provided, including adjustment module, display panel and for providing
Close the power module of voltage, wherein the adjustment module is adjustment module provided by the present invention, the power module and institute
State adjustment module electrical connection.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow diagram of voltage compensating method provided by the present invention；
Fig. 2 is the structural block diagram of adjustment module provided by the present invention；
Fig. 3 is the electrical block diagram that judging unit is calculated described in Fig. 2；
Fig. 4 is the structural schematic diagram of display device provided by the present invention；
Fig. 5 is to carry out electricity to the closing voltage of the pixel unit using in voltage compensating method provided by the present invention
Press the compensation rate and the graph of relation of time of compensation；
Fig. 6 is that there are pixel voltage waveform diagrams when vertical crosstalk for display device provided by the present invention；
Fig. 7 is the leakage current of the pixel unit thin film transistor (TFT) of display device provided by the present invention and the pass for closing voltage
It is curve graph.
Description of symbols
100: adjustment module 110: drive control unit
120: voltage acquisition unit 130: calculating judging unit
140: power conditioning unit 141: first comparator
142: the second comparators 143: or door
200: display device 210: display panel
220: power module 230: first circuit board
240: flip chip 250: second circuit board
260: flexible circuit board
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
As one aspect of the present invention, a kind of method for eliminating vertical crosstalk when display panel is shown, institute are provided
Stating display panel includes the multiple pixel units for being arranged as A row B column, wherein as shown in Figure 1, which comprises
Step S1, successively the control terminal of N row pixel unit provides scanning cut-in voltage forward, to all column pixel units
Input terminal provides the first gray scale voltage；
Step S2, scanning cut-in voltage successively is provided to N+1 row to the control terminal of N+a row pixel unit, to m column pixel
The input terminal of unit to M+b column pixel unit provides the second gray scale voltage, to M+b+1 column pixel unit to column b pixel
The input terminal of unit provides the first gray scale voltage, wherein second gray scale voltage is higher than first gray scale voltage, acquisition the
The pixel voltage of c row d column pixel unit is denoted as the first pixel voltage, when e row pixel unit is opened, acquires e row f
The pixel voltage of column pixel unit is denoted as the second pixel voltage, wherein M, N, a, b, c, d, e, f are positive integer, and are fixed
Amount, and c < N, M
< d < (M+b), (N+1) < e < (N+a), (M+b+1) < f < B；
Step S3, scanning cut-in voltage, Xiang Suoyou successively are provided to N+a+1 row to the control terminal of last line pixel unit
The input terminal of column pixel unit provides the first gray scale voltage, and the pixel voltage of acquisition g row d column pixel unit is denoted as third picture
Plain voltage, wherein g is positive integer, and is quantitative, (N+a+1) < g < A；
Step S4, the first difference between first pixel voltage and second pixel voltage is calculated, described in calculating
The second difference between second pixel voltage and the third pixel voltage judges the absolute value and described the of first difference
Whether the absolute value of two differences is respectively less than preset threshold, if it is not, then adjusting the closing voltage of the display panel, and repeats
Step S1 to step S4, until the absolute value of first difference and the absolute value of second difference are respectively less than the default threshold
Until value, wherein before scanning cut-in voltage is provided to the control terminal of the pixel unit and after scanning cut-in voltage is provided,
The closing voltage is provided to the control terminal of the pixel unit.
It should be pointed out that each pixel unit includes memory module.When showing a frame picture, need line by line to
The control terminal of each pixel unit provides cut-in voltage, and data voltage is written to pixel unit line by line and is stored in storage mould
In block.It is that pixel unit is powered by memory module after pixel unit is closed, before a frame picture terminates, maintenance pixel list
The brightness of member.If pixel unit can not be completely closed when receiving and closing voltage and the pixel list on same data line
The gray scale voltage that member receives is inconsistent, then can generate string because of voltage difference between the pixel unit on same data line
Disturb electric current.
In method provided by the present invention, for M+b+1 column pixel unit to column b pixel unit, preceding N row
The pixel unit of the brightness of pixel unit and the brightness of intermediate different, the rear N row pixel units of the brightness of pixel unit and centre
Brightness it is different, it is most likely that vertical crosstalk can occur.B+1 arrange it is consistent to last column pixel unit brightness, therefore will not
Disposition crosstalk occurs.
In the case where vertical crosstalk does not occur, first difference should be identical as second difference.
If first difference and second difference are all larger than the preset threshold, show the pixel list of middle section
There is vertical crosstalk in member.As mentioned above it is possible, occurring the reason of vertical crosstalk between pixel unit is that closing voltage is improper,
It could not make pixel unit normal switching-off.By adjusting voltage is closed, each pixel unit can be made can normally open and
It closes, to mitigate the vertical crosstalk phenomenon for even being eliminated display device.
In the present invention, by acquiring the pixel voltage of selected pixel unit to be measured in real time, the pixel list to be measured is calculated
The difference of the pixel voltage of member, and judge the numerical relation of the difference Yu the preset threshold, to determine whether described in adjusting
The closing voltage of display panel, when the difference be greater than the preset threshold when, then to the closing voltage of the display panel into
Row is adjusted, until the absolute value of the first difference and the absolute value of second difference are respectively less than preset threshold.Institute of the present invention
The method of offer realizes the feedback regulation process of the pixel voltage based on pixel unit to be measured, and regulated variable is the display surface
The closing voltage of the pixel unit of plate, does not need technical staff and manually adjusts, to improve the closing voltage to pixel unit
Efficiency is adjusted, and then improves the adjusting efficiency to pixel voltage, final realize is effectively improved display panel vertical cross talk problems.
In addition, feedback regulation process as described above, not will receive the influence of the different characteristics of display panel, specifically,
When temperature change leads to the closing voltage change of the TFT of pixel unit, the method can correspond to pixel list under Current Temperatures
The closing voltage of the TFT of member carries out dynamic regulation, until the first difference and second difference are respectively less than preset threshold, has
Effect solves the vertical cross talk problems.
The method provided by the present invention for eliminating vertical crosstalk when display panel is shown can be adaptively different to having
The display panel of characteristic is adjusted, and the effect for improving vertical cross talk problems is more preferable, and the scope of application is wider, and human cost subtracts
Low, efficiency improves.
In the present invention, without limitation to row, column the quantity A and B of pixel unit included by the display panel, for example,
Preferably, B=2M+b, A=2N+a+1.
The principle of the method for vertical crosstalk is illustrated when below to elimination display panel display provided by the present invention:
As shown in figure 4, the frame that display panel 210 is shown is shown in picture, the brightness of intermediate viewing area is aobvious higher than edge
Show the brightness in area, is shown correspondingly, load is higher than load to the pixel voltage of the pixel unit of the intermediate viewing area to edge
Show the pixel voltage in area, therefore, by taking the second data line D2 as an example, gives corresponding column pixel unit by the second data line D2
When pouring pixel voltage line by line, the TFT of the pixel unit of intermediate viewing area can leak electricity to the pixel unit for being located at edge viewing area,
So that the actual pixels voltage of the pixel unit of edge viewing area is higher than the respective pixel voltage that the second data line D2 is provided,
And then on the display picture of macroscopic view, the brightness of the edge viewing area upper and lower positioned at intermediate viewing area, which is greater than, is located at intermediate display
, that is, there are the vertical cross talk problems in the brightness of the left and right edge viewing area in area.
" upper and lower, left and right " described herein are schematically illustrating of carrying out by taking display device shown in fig. 5 as an example, and
It does not form any restrictions to the present invention.
For these reasons, the vertical cross talk problems of the display panel to be solved, it is necessary to by the picture of edge viewing area
The difference between respective pixel voltage that the actual pixels voltage and data line of plain unit provide minimizes, and the pixel voltage
The TFT electric leakage degree of difference and pixel unit it is related, and reacting the leak electricity index of degree of pixel is leakage current Ioff, leakage current
IoffRelated to the closing voltage VGL of the TFT of pixel unit, therefore physical relationship curve is as shown in fig. 7, can pass through adjusting pixel
The closing voltage of unit TFT, so that closing voltage reaches optimum value VGL_best, corresponding leakage current I at this timeoffMinimum, pixel
Unit electric leakage is minimum, so that the difference of pixel voltage is minimum, to improve the vertical cross talk problems of the display panel.
In addition, as shown in fig. 7, when temperature difference, for example, at 20 DEG C, 60 DEG C and 100 DEG C, the pixel unit
The leakage current of TFT-closing voltage response also changes, and in turn, the optimum value VGL_best for closing voltage is also mutually strained
Change.
Based on the above principles, the method provided by the present invention for eliminating vertical crosstalk when display panel is shown, according to Fig. 7 institute
The characteristic curve shown, the optimum value VGL_ of the TFT by adjusting the pixel unit closed under voltage VGL to corresponding temperature
Best, that is, the absolute value of corresponding first difference and the absolute value of second difference are respectively less than preset threshold, so that
The vertical cross talk problems of the display panel are improved.
In the present invention, the step of adjusting the closing voltage of the display panel include:
Determine adjusting direction, the direction that adjusts is selected from described in increase by the first adjusting direction for closing voltage and reduction
Close voltage second adjusts one of direction；
The closing voltage is adjusted according to determining adjusting direction.
As described above, determine the effect for adjusting direction be to ensure that according to the adjusting direction to the closing voltage of display panel into
After row is adjusted, the absolute value of the absolute value of first difference and second difference can be to the side for being less than the preset threshold
To variation, so as to improve the vertical cross talk problems of the display panel.
Further, it is preferable to which ground, described determining the step of adjusting direction, include:
It receives and is closed in the period of voltage in the control terminal of pixel unit, adjust direction according to first and adjust the pass
Close voltage；
Re-execute the steps S1 to step S3, and execute calculated in step S4 first difference and calculate it is described second poor
The step of value；
Judge to increase it is described close first difference after voltage and whether be less than increase described the closed before voltage
One difference, and whether second difference is less than before increasing the closing voltage after the increase closing voltage described second is poor
Value, if so, determining that described first adjusts direction for the adjusting direction, if not, it is determined that second adjusting direction is institute
It states and adjusts direction.
As shown in figure 5, it is pre- for being supplied to the offset stepVGL of the closing voltage of the pixel unit TFT in the present invention
If amplitude, specific amplitude can be depending on degree of regulation demand；After adjusting the TFT closing voltage VGL of preceding pixel unit and adjusting
The difference that the TFT of pixel unit closes voltage VGL ' is Δ VGL, and difference DELTA VGL may include multiple offset stepVGL.
In the present invention, without limitation to the value of the N and the M.For example, as an optional implementation manner, institute
Stating N is the display panel whole pixel unit line numberExtremelyThe M is the display panel whole pixel unit columns
'sExtremely
As described above, as shown in figure 4, forward and backward N row pixel unit, left and right M column pixel unit are by the display panel
It is center viewing area and edge viewing area that viewing area, which divides,.
Preferably, the N is the display panel whole pixel unit line numberThe M is that the display panel is complete
Portion's pixel unit columns
The length and width of the thus obtained center viewing area is the half of the display surface length and width of display panel.To described
The pixel unit of display panel is filled with gray scale voltage (for example, can be according to gray scale voltage waveform shown in fig. 6 to the pixel list
Member charging, it should be noted that the stage is filled in gray scale voltage, forward and backward the 1/ of the first data line D1 and the second data line D2
The corresponding gray scale voltage of 4frame should be identical, is the pixel list because of 1/4frame to 3/4frame there are difference DELTA V in Fig. 7
Caused by member is leaked electricity to the pixel unit of forward and backward 1/4frame, the gray scale voltage that not the second data line D2 is provided originally is greater than
The gray scale voltage that first data line D1 is provided), obtain the picture for detecting display panel, wherein it is shown in picture in a frame,
Forward and backward a quarter frame (1/4frame) picture shows the corresponding gray-scale intensity of the first gray scale voltage, and intermediate a quarter frame is extremely
In the picture of 3/4ths frames, left and right a quarter picture shows the corresponding gray-scale intensity of the first gray scale voltage, centre four/
3/1sts to four picture shows the corresponding gray-scale intensity of the second gray scale voltage, thus aobvious using the center viewing area and edge
Show that the gray scale voltage that area is filled with is different, the display panel is detected, it macroscopically can also be poor by the gray-scale intensity of display
It is different to judge the display panel with the presence or absence of vertical cross talk problems.
It should be noted that the present invention for pixel unit to be measured selection without limitation.
For example, mode is preferably carried out as one kind, as shown in figure 4, being located at c row d column pixel unit is denoted as first
Pixel unit 1 is denoted as the second pixel unit 2 positioned at e row f column pixel unit, is denoted as positioned at g row d column pixel unit
Third pixel unit 3.Wherein, the first pixel unit 1 and third pixel unit 3 are located on the second data line D2, and the second pixel
Unit is on the first data line D1.
It should be noted that since the second data line D2 corresponds to center viewing area, the first pixel unit 1 and the
Three pixel units 3 are used as object pixel unit, and the first data line D1 is located at the edge viewing area on the right side of center viewing area, by
It is remained unchanged in the gray scale voltage being passed through, therefore, the second pixel unit 2 can be with comparing pixel unit.
Optionally, the c is the display panel whole pixel unit line numberExtremelyThe g is the display surface
Plate whole pixel unit line numberExtremelyThe d is the display panel all pixels unit columnsExtremely
Preferably, the c is the display panel whole pixel unit line numberThe g is that the display panel is complete
Portion's pixel unit line numberThe d is the display panel all pixels unit columns
As an optional implementation manner, the second pixel unit 2 can also be chosen at the edge on the left of the viewing area of center
Viewing area, the first pixel unit 1 and third pixel unit 3 can not also on same data line, but be to ensure that data line to
The gray scale voltage that first pixel unit 1 and third pixel unit 3 are filled with is identical, and to guarantee above-mentioned steps S4 the step of is effective, into
And voltage compensating method provided by the present invention is able to carry out.
In the present invention, first gray scale voltage and the corresponding greyscale level of second gray scale voltage are not limited
Fixed, for example, as an optional implementation manner, the corresponding grayscale of first gray scale voltage is 0 grade~127 grades, described the
The corresponding grayscale of two gray scale voltages is 128 grades~255 grades.
As described above, the second gray scale voltage can guarantee the center viewing area of the display panel higher than the first gray scale voltage
Brightness be higher than edge viewing area brightness, in order to which the vertical cross talk problems to display panel detect, and pass through this hair
The method of vertical crosstalk is adjusted when eliminating display panel display provided by bright, to improve the vertical cross talk problems.
Preferably, as shown in fig. 6, the corresponding grayscale of first gray scale voltage is 63 grades (Gary63), second ash
The corresponding grayscale of rank voltage is 255 grades (Gary255).
As the second aspect of the present invention, provide a kind of for eliminating the adjusting mould of vertical crosstalk when display panel is shown
Block, the display panel include the multiple pixel units for being arranged as A row B column, wherein as shown in Fig. 2, adjustment module 100 includes
Drive control unit 110, calculates judging unit 130 and power conditioning unit 140 at voltage acquisition unit 120.
Drive control unit 110 is used to control the drive element of the grid for driving the display panel and drives the display surface
The source drive unit of plate provides signal according to following rule:
Successively the control terminal of N row pixel unit provides scanning cut-in voltage, the source electrode to the drive element of the grid forward
Driving unit provides the first gray scale voltage to the input terminal of all column pixel units；The drive element of the grid is successively to N+1 row
Control terminal to N+a row pixel unit provides scanning cut-in voltage, and the source drive unit is to m column pixel unit to M+
The input terminal of b column pixel unit provides the second gray scale voltage, while to M+b+1 column pixel unit to column b pixel unit
Input terminal provides the first gray scale voltage, wherein second gray scale voltage is higher than first gray scale voltage.
The pixel voltage that voltage acquisition unit 120 is used to acquire c row d column pixel unit is denoted as the first pixel voltage,
When e row pixel unit is opened, the pixel voltage that voltage acquisition unit 120 is used to acquire e row f column pixel unit is denoted as
Second pixel voltage, wherein M, N, a, b, c, d, e, f are positive integer, and are quantitative, and c < N, M < d < (M+b), (N+
1) < e < (N+a), (M+b+1) < f < B；The drive element of the grid is successively to N+a+1 row to last line pixel unit
Control terminal provides scanning cut-in voltage, and the source drive unit provides the first grayscale electricity to the input terminal of all column pixel units
Pressure, the pixel voltage that voltage acquisition unit 120 is used to acquire g row d column pixel unit are denoted as third pixel voltage, wherein g
It for positive integer, and is quantitative, (N+a+1) < g < A.
It is poor to calculate judging unit 130 is used to calculate between first pixel voltage and second pixel voltage first
Value calculates the second difference between second pixel voltage and the third pixel voltage, judges first difference and institute
State whether the second difference is respectively less than preset threshold, power conditioning unit 140 for being in the judging result for calculating judging unit 130
Out-put supply controls signal when no.The power control signal is used to control the closing electricity that power module adjusts the display panel
Pressure.Wherein, the drive element of the grid is used for before providing scanning cut-in voltage to the control terminal of the pixel unit and mentions
After scanning cut-in voltage, the closing voltage is provided to the control terminal of the pixel unit.
As described above, adjustment module 100 is able to carry out the method provided by the present invention including step S1 to step S4, it is real
The adjusting of voltage is now closed to the display panel, working principle and technical effect have been retouched in detail in preceding method part
It states, details are not described herein again.
It should be noted that the present invention to the circuit structure of voltage acquisition unit 130 without limitation, for example, as one kind
Be preferably carried out mode, voltage acquisition unit 130 includes at least three lead-in wires, a plurality of lead be used for it is corresponding it is described to
The pixel electrode electrical connection of pixel unit (that is, first pixel unit, the second pixel unit and third pixel unit) is surveyed, with
The pixel voltage of the pixel unit to be measured is acquired in real time.
The other end of the lead and the output end as the voltage acquisition unit, are used for and the calculating judging unit
Input terminal electrical connection, the pixel voltage of the collected pixel unit to be measured is sent to the calculating judging unit.
Herein, it should be noted that since pixel unit to be measured is distributed in the different location of display panel, lead
Length has differences, and also needs to carry out impedance matching to the lead thus, to guarantee the pixel voltage of acquisition in lead
On extent of deterioration it is identical.
Further, the present invention to the mode of " matching impedance " without limitation, for example, it is alternatively possible to by giving
The lead series resistance, to realize impedance matching.
The present invention to calculate judging unit 140 structure without limitation.As a preferred implementation manner, as shown in figure 3,
Calculating judging unit 140 includes or door 143, first comparator 141 and the second comparator 142, wherein first comparator 141 is used
In receive the first pixel voltage V1 and the second pixel voltage V2, and by the first difference DELTA V1 being calculated export to or door 143；
Second comparator 142 is for receiving the second pixel voltage V2 and third pixel voltage V3, and the second difference DELTA that will be calculated
V2 export to or door 143.Or door 143 is for receiving the first difference DELTA V1 and the second difference DELTA V2, it is exhausted as the first difference DELTA V1
To when at least there is one greater than the preset threshold in the absolute value of value and the second difference DELTA V2 or the enabled letter of the output of door 143
Number.Power conditioning unit 150 is for exporting the power control signal, the power supply control when receiving the enable signal
Signal closes voltage change predetermined amplitude for controlling.
As shown in figure 5, the offset stepVGL for being supplied to the closing voltage of the pixel unit TFT is described predetermined
Amplitude, as it was noted above, specific amplitude can be depending on degree of regulation demand；The TFT for adjusting preceding pixel unit closes voltage VGL
The difference that voltage VGL ' is closed with the TFT of pixel unit after adjusting is Δ VGL, and difference DELTA VGL may include multiple offsets
stepVGL。
Further, the present invention to the first comparator and second comparator without limitation, for example, as one kind
It is preferably carried out mode.First comparator 141 includes the first operational amplifier, first resistor R1, second resistance R2,3rd resistor
R3 and the first reference resistance Rf1, specifically, one end of first resistor R1 is formed as calculating the first input end of judging unit 140,
The other end of first resistor R1 is electrically connected with the inverting input terminal of first operational amplifier, and one end of second resistance R2 is formed
For the second input terminal for calculating judging unit 140, the other end of second resistance R2 is remote with described first to calculate the same mutually defeated of amplifier
Enter end electrical connection, the first reference resistance Rf1One end is electrically connected with the inverting input terminal of first operational amplifier, the other end with
The output end of first operational amplifier is electrically connected, and one end of 3rd resistor R3 is remote with described first to calculate the same mutually defeated of amplifier
Enter end electrical connection, other end ground connection.
Second comparator 142 includes second operational amplifier, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 and the
Two reference resistance Rf2, one end of the 4th resistance R4 is electrically connected with second input terminal, the other end and second operation amplifier
The inverting input terminal of device is electrically connected, and one end of the 5th resistance R5 is formed as calculating the third input terminal of judging unit 140, the other end
It is electrically connected with the non-inverting input terminal of the second operational amplifier, the second reference resistance Rf2One end and the second operational amplifier
Inverting input terminal electrical connection, the other end is electrically connected with the output end of the second operational amplifier, one end of the 6th resistance R6
The non-inverting input terminal for calculating amplifier remote with described second is electrically connected, other end ground connection.
Or the first end of door 143 is electrically connected with the output end of first operational amplifier or the second end of door 143 and institute
The third end of the output end electrical connection or door 143 of stating second operational amplifier is formed as calculating the output end of judging unit 140.
Based on above embodiment, first comparator 141 and the second comparator 142 are respectively according to following formula (1) and (2)
Calculate the first difference DELTA V1 and the second difference DELTA V2:
Wherein, for convenient for calculate, it is adjustableOr door 143 is described enabled according to the output of following logical table
Signal:
| ΔV1 | ΔV2 | Vout |
| <Vref_L | <Vref_L | L |
| <Vref_L | ≥Vref_L | H |
| ≥Vref_L | <Vref_L | H |
| ≥Vref_L | ≥Vref_L | H |
Wherein, Vref_L is low value reference voltage, that is, the preset threshold, specifically decision logic is as follows:
When the first difference DELTA V1 and the second difference DELTA V2 are respectively less than preset threshold Vref_L, sentence at this time it is considered that Δ
V1, Δ V2 are equal to zero, that is, the pixel voltage one of the first pixel unit 1, the second pixel unit 2 and third pixel unit 3
It causes, the output end for calculating judging unit 140 does not export enable signal, and control power conditioning unit 150 is in off working state, institute
It states under off working state, the power conditioning unit will not control power module output offset voltage.
In the case of remaining, it is believed that the pixel of the first pixel unit 1, the second pixel unit 2 and third pixel unit 3
Voltage is inconsistent, therefore the output end for calculating judging unit 140 exports enable signal, and the enable signal control power supply adjusts single
Member 150 is to working condition, and in the operating condition, power conditioning unit 150 exports the power control signal further to control
The closing voltage of pixel unit described in electric power source pair of module is adjusted.
In the present invention, without limitation to the power conditioning unit, it is preferable that the power conditioning unit includes analysis
Unit and compensation subelement.
The analysis subelement adjusts the adjusting direction for closing voltage for determining, the adjusting direction, which is selected from, to be increased
The first adjusting direction for closing voltage and the reduction closing voltage regulation two adjust one of direction；Compensation is single
Member is for exporting corresponding power control signal according to determining adjusting direction, to control display surface described in the electric power source pair of module
The closing voltage of plate is adjusted.
As described above, the compensation subelement is according to the adjusting direction, to the display panel after determining adjusting direction
(specifically adjust pixel unit TFT control terminal input closing voltage) close voltage be adjusted, later, institute
It states adjustment module and continues to execute the step S1 to step S4, until the absolute value of first difference and second difference
Until absolute value is respectively less than preset threshold.
As third aspect of the present invention, a kind of display device is provided, as shown in figure 4, display device 200 includes adjusting mould
Block, display panel 210 and for provide close voltage power module 220, wherein the adjustment module be it is provided by the present invention
Adjustment module, power module 220 is electrically connected with the adjustment module.
As described above, the adjustment module can detect display panel 210 when the power-up display of display device 200,
If there are the vertical cross talk problems for the display panel, the adjustment module control power module 220 is to the display surface
The closing voltage of plate is adjusted, and even is eliminated the vertical cross talk problems to improve, and then improve the display of display panel 210
Image quality.
Specifically, principle can refer to the description of aforesaid voltage compensation method and adjustment module part, and details are not described herein.
In the present invention, without limitation to power module 220, it is preferable that power module 220 can be power management chip
PMIC。
In order to simplify manufacture craft, the source drive unit can directly utilize the source electrode drive circuit of display panel 210,
Also, voltage acquisition unit (lead, build-out resistor) can be formed in same processing step with the source electrode drive circuit.
The lead output end of the voltage acquisition unit can lead to second circuit board 250 by flip chip 240, lead to
It crosses second circuit board 250 and is electrically connected with the calculating judging unit 150 being located on first circuit board 230.
Wherein, it is electrically connected between multiple second circuit boards by flexible circuit board 260；The extension side of second circuit board 250
To parallel with the grid line direction of display panel 210.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of method for eliminating vertical crosstalk when display panel is shown, the display panel includes being arranged as A row B to arrange
Multiple pixel units, which is characterized in that the described method includes:
S1, successively the control terminal of N row pixel unit provides scanning cut-in voltage forward, mentions to the input terminal of all column pixel units
For the first gray scale voltage；
S2, successively to N+1 row to the control terminal of N+a row pixel unit scanning cut-in voltage is provided, to m column pixel unit to the
The input terminal of M+b column pixel unit provides the second gray scale voltage, defeated to M+b+1 column pixel unit to column b pixel unit
Enter end and the first gray scale voltage is provided, wherein second gray scale voltage is higher than first gray scale voltage, acquisition c row d column
The pixel voltage of pixel unit is denoted as the first pixel voltage, when e row pixel unit is opened, acquires e row f column pixel list
The pixel voltage of member is denoted as the second pixel voltage, wherein M, N, a, b, c, d, e, f are positive integer, and are quantitative, and c <
N, M < d < (M+b), (N+1) < e < (N+a), (M+b+1) < f < B；
S3, it is successively provided to N+a+1 row to the control terminal of last line pixel unit and scans cut-in voltage, to all column pixel lists
The input terminal of member provides the first gray scale voltage, and the pixel voltage of acquisition g row d column pixel unit is denoted as third pixel voltage,
Wherein, g is positive integer, and is quantitative, (N+a+1) < g < A；
The first difference between S4, calculating first pixel voltage and second pixel voltage, calculates second pixel
The second difference between voltage and the third pixel voltage, judge first difference absolute value and second difference
Whether absolute value is respectively less than preset threshold,
If it is not, then adjusting the closing voltage of the display panel, and step S1 to step S4 is repeated, until described first poor
Until the absolute value of the absolute value of value and second difference is respectively less than the preset threshold, wherein to the pixel unit
Control terminal provide scanning cut-in voltage before and provide scanning cut-in voltage after, to the control terminal of the pixel unit provide
The closing voltage.
2. the method according to claim 1, wherein the step of adjusting the closing voltage of display panel packet
It includes:
Determine that adjusting direction, the direction that adjusts are selected from increase by the first adjusting direction for closing voltage and reduce the closing
The second of voltage adjusts one of direction；
The closing voltage is adjusted according to determining adjusting direction.
3. according to the method described in claim 2, it is characterized in that, the determination includes: the step of adjusting direction
It receives and is closed in the period of voltage in the control terminal of pixel unit, adjust direction according to first and adjust the closing electricity
Pressure；
It is re-execute the steps S1 to step S3, and is executed and is calculated first difference in step S4 and calculate second difference
Step；
Judge to increase it is described close first difference after voltage whether be less than increase it is described close it is described first poor before voltage
Value, and whether second difference is less than second difference before increasing the closing voltage after the increase closing voltage,
If so, determining that described first adjusts direction for the adjusting direction, if not, it is determined that described second adjusts direction as the tune
Save direction.
4. the method according to claim 1, wherein B=2M+b, A=2N+a+1.
5. method as claimed in any of claims 1 to 4, which is characterized in that the N is that the display panel is whole
Pixel unit line numberExtremelyThe M is the display panel whole pixel unit columnsExtremelyThe c is described aobvious
Show panel whole pixel unit line numberExtremelyThe g is the display panel whole pixel unit line numberExtremely
The d is the display panel all pixels unit columnsExtremely
6. method as claimed in any of claims 1 to 4, which is characterized in that first gray scale voltage is corresponding
Grayscale is 0 grade~127 grades, and the corresponding grayscale of second gray scale voltage is 128 grades~255 grades.
7. a kind of for eliminating the adjustment module of vertical crosstalk when display panel is shown, the display panel includes being arranged as A row B
Multiple pixel units of column, which is characterized in that the adjustment module includes that drive control unit, voltage acquisition unit, calculating are sentenced
Disconnected unit and power conditioning unit,
The drive control unit is used to control the drive element of the grid for driving the display panel and drives the display panel
Source drive unit according to it is following rule provide signal:
Successively the control terminal of N row pixel unit provides scanning cut-in voltage, the source drive to the drive element of the grid forward
Unit provides the first gray scale voltage to the input terminal of all column pixel units；
The drive element of the grid successively provides scanning cut-in voltage, the source to N+1 row to the control terminal of N+a row pixel unit
Input terminal of the pole driving unit to m column pixel unit to M+b column pixel unit provides the second gray scale voltage, while to M+
The input terminal of b+1 column pixel unit to column b pixel unit provides the first gray scale voltage, wherein second gray scale voltage is high
In first gray scale voltage, the pixel voltage that the voltage acquisition unit is used to acquire c row d column pixel unit is denoted as the
One pixel voltage, when e row pixel unit is opened, the voltage acquisition unit is for acquiring e row f column pixel unit
Pixel voltage is denoted as the second pixel voltage,
Wherein, M, N, a, b, c, d, e, f are positive integer, and are quantitative, and c < N, M < d < (M+b), (N+1) < e < (N
+ a), (M+b+1) < f < B；
The drive element of the grid successively provides scanning cut-in voltage to N+a+1 row to the control terminal of last line pixel unit,
The source drive unit provides the first gray scale voltage to the input terminal of all column pixel units, and the voltage acquisition unit is used for
The pixel voltage for acquiring g row d column pixel unit is denoted as third pixel voltage, wherein g is positive integer, and is quantitative, (N+a
+ 1) < g < A；
It is described calculate judging unit be used to calculate the first difference between first pixel voltage and second pixel voltage,
The absolute value for calculating the second difference between second pixel voltage and the third pixel voltage, judging first difference
Whether it is respectively less than preset threshold with the absolute value of second difference,
The power conditioning unit is used for the out-put supply when the judging result for calculating judging unit is no and controls signal, institute
Power control signal is stated for controlling the closing voltage that power module adjusts the display panel, wherein the gate driving list
Member is used for before providing scanning cut-in voltage to the control terminal of the pixel unit and after providing scanning cut-in voltage, to institute
The control terminal for stating pixel unit provides the closing voltage.
8. adjustment module according to claim 7, which is characterized in that the calculating judging unit include or door, first ratio
Compared with device and the second comparator,
The first comparator is for receiving first pixel voltage and second pixel voltage, and the institute that will be calculated
The first difference is stated to export to described or door,
Second comparator is for receiving second pixel voltage and the third pixel voltage, and the institute that will be calculated
The second difference is stated to export to described or door,
Described or door is used at least have one in the absolute value of first difference and the absolute value of second difference big
Enable signal is exported when the preset threshold；
The power conditioning unit is for exporting the power control signal, the power supply control when receiving the enable signal
Signal processed closes voltage change predetermined amplitude for controlling.
9. adjustment module according to claim 7 or 8, which is characterized in that power conditioning unit include analysis subelement and
Subelement is compensated,
The analysis subelement, which is used to determine, adjusts the adjusting direction for closing voltage, and the adjusting direction is selected from described in increase
It closes the first of voltage and adjusts one of direction and the reduction adjusting of closing voltage regulation two direction；
The compensation subelement is used to export corresponding power control signal according to determining adjusting direction, to control the power supply
The closing voltage of the display panel is adjusted in module.
10. a kind of display device, the display device includes adjustment module, display panel and for providing the power supply for closing voltage
Module, which is characterized in that the adjustment module is adjustment module described in any one of claim 6 to 8, the power supply mould
Block is electrically connected with the adjustment module.
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| CN201910151353.4A CN109686295A (en) | 2019-02-28 | 2019-02-28 | Eliminate method, adjustment module and the display device of display panel vertical crosstalk |
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| CN113948051A (en) * | 2021-10-28 | 2022-01-18 | 合肥鑫晟光电科技有限公司 | Display driving circuit, display driving method and display device |
| CN114822439A (en) * | 2022-04-29 | 2022-07-29 | 长沙惠科光电有限公司 | Display driving circuit, array substrate, display panel and display |
| CN115410509A (en) * | 2022-08-25 | 2022-11-29 | 惠科股份有限公司 | Display panel, driving method thereof and electronic equipment |
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Application publication date: 20190426 |