CN106205558B - Image element driving method and device - Google Patents
Image element driving method and device Download PDFInfo
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- CN106205558B CN106205558B CN201610873836.1A CN201610873836A CN106205558B CN 106205558 B CN106205558 B CN 106205558B CN 201610873836 A CN201610873836 A CN 201610873836A CN 106205558 B CN106205558 B CN 106205558B
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The invention discloses a kind of image element driving method and devices, belong to display actuation techniques field.The method includes：Apply first voltage to pixel unit in first time period by data line, applies second voltage to the pixel unit in second time period, the first time period continuously applies the period with second time period composition one；Wherein, first absolute value is more than the second absolute value, first absolute value is the absolute value of the first voltage and common voltage difference, second absolute value is the absolute value of the second voltage and the common voltage difference, and the second voltage is the target voltage for applying pixel unit charging described in the period currently.The present invention is applied with the voltage of the driving capability bigger than target voltage by data line to pixel unit, improves the charge efficiency of pixel unit, keeps the display brightness of each position on display panel more uniform.The present invention is for showing image.
Description
Technical field
The present invention relates to display actuation techniques field, more particularly to a kind of image element driving method and device.
Background technology
In a display device, the pixel unit of display panel is formed with thin film transistor (TFT) (English：Thin Film
Transistor；Referred to as：TFT), which can drive pixel unit to realize that image is shown.With display actuation techniques it is quick
Development, certain application fields show that the requirement of the quality of image is also gradually increased to display panel.
Currently, every a line grid line by scanning display panel, data line can give corresponding pixel unit to apply data electricity
Signal is pressed, to drive each pixel unit, to realize that image is shown.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems：
Since there are dead resistance, the parasitic electricity of overlapping presence of data line and grid line on the data line on display panel
Hold, when data line applies data voltage to corresponding pixel unit, there can be certain capacitance-resistance delay (also referred to as RC delay),
So that data voltage applies slowly, the charge efficiency of pixel unit is reduced, display panel is caused moire (English occur：mura)
Phenomena such as bad, therefore, the display brightness of each position on display panel, are more uneven.
Invention content
In order to which the charge efficiency for solving the prior art is low, the non-uniform problem of display brightness of display panel, present invention reality
It applies example and provides a kind of image element driving method and device.The technical solution is as follows：
On the one hand, a kind of image element driving method is provided, the method includes：
Apply first voltage to pixel unit in first time period by data line, in second time period to the pixel list
Member applies second voltage, and the first time period continuously applies the period with second time period composition one；
Wherein, the first absolute value is more than the second absolute value, and first absolute value is the first voltage and common voltage
The absolute value of difference, second absolute value be the second voltage and the common voltage difference absolute value, described second
Voltage is the target voltage for applying pixel unit charging described in the period currently.
Optionally, it is described by data line first time period to pixel unit apply first voltage before, the side
Method further includes：
Determine the first voltage.
Optionally, the determination first voltage, including：
Obtain a upper grayscale and the target gray scale, grayscale when a upper grayscale is upper application end cycle, institute
It is the corresponding grayscale of the target voltage to state target gray scale；
Preset gray scale table is inquired according to a upper grayscale and the target gray scale, obtains a upper grayscale and the mesh
Mark corresponding first grayscale of grayscale, the preset gray scale table record has multiple second grayscale and multiple third grayscale and any
Grayscale corresponding to second grayscale and any third grayscale, second grayscale corresponding application period are the third grayscale pair
A upper period in the application period answered；
The corresponding data voltage of first grayscale is determined as the first voltage.
Optionally, the preset gray scale table includes positivity grayscale table and negativity grayscale table, the positivity grayscale table record
Second grayscale is identical as the polarity of third grayscale, and the second grayscale of the negativity grayscale table record and the polarity of third grayscale are not
Together；
It is described that preset gray scale table is inquired according to a upper grayscale and the target gray scale, including：
It is whether identical as the polarity of the target gray scale to detect a upper grayscale；
When the upper grayscale is identical as the polarity of the target gray scale, the positivity grayscale table is inquired；
When the polarity difference of a upper grayscale and the target gray scale, the negativity grayscale table is inquired.
Optionally, the determination first voltage, including：
The first voltage is calculated using voltage computing formula；
Wherein, the voltage computing formula is：
Vo=α * R*C*Vt/T1+V1；
In the voltage computing formula, Vo is the first voltage；α is default regulation coefficient, and R is the pixel unit
On dead resistance, C be the pixel unit on parasitic capacitance, T1 be the first time period duration, Vt be the mesh
Voltage is marked, V1 is the corresponding voltage of a upper grayscale, and a upper grayscale is upper one grayscale for applying the period.
On the other hand, a kind of pixel driving device is provided, described device includes：
Applying unit, for applying first voltage to pixel unit in first time period by data line, in the second time
Section applies second voltage to the pixel unit, and the first time period continuously applies week with second time period composition one
Phase；
Wherein, the first absolute value is more than the second absolute value, and first absolute value is the first voltage and common voltage
The absolute value of difference, second absolute value be the second voltage and the common voltage difference absolute value, described second
Voltage is the target voltage for applying pixel unit charging described in the period currently.
Optionally, before the applying unit, described device further includes：
Determination unit, for determining the first voltage.
Optionally, the determination unit, including：
Subelement is obtained, for obtaining a upper grayscale and the target gray scale, a upper grayscale was a upper application period
At the end of grayscale, the target gray scale be the corresponding grayscale of the target voltage；
Subelement is inquired, for inquiring preset gray scale table according to a upper grayscale and the target gray scale, is obtained described
A upper grayscale and corresponding first grayscale of the target gray scale, preset gray scale table record have multiple second grayscale and multiple the
Grayscale corresponding to three grayscale and any second grayscale and any third grayscale, second grayscale corresponding application period
For the third grayscale corresponding upper period for applying the period；
Determination subelement, for the corresponding data voltage of first grayscale to be determined as the first voltage.
Optionally, the preset gray scale table includes positivity grayscale table and negativity grayscale table, the positivity grayscale table record
Second grayscale is identical as the polarity of third grayscale, and the second grayscale of the negativity grayscale table record and the polarity of third grayscale are not
Together；
The inquiry subelement, is used for：
It is whether identical as the polarity of the target gray scale to detect a upper grayscale；
When the upper grayscale is identical as the polarity of the target gray scale, the positivity grayscale table is inquired；
When the polarity difference of a upper grayscale and the target gray scale, the negativity grayscale table is inquired.
Optionally, the determination unit, is used for：
The first voltage is calculated using voltage computing formula；
Wherein, the voltage computing formula is：
Vo=α * R*C*Vt/T1+V1；
In the voltage computing formula, Vo is the first voltage；α is default regulation coefficient, and R is the pixel unit
On dead resistance, C be the pixel unit on parasitic capacitance, T1 be the first time period duration, Vt be the mesh
Voltage is marked, V1 is the corresponding voltage of a upper grayscale, and a upper grayscale is upper one grayscale for applying the period.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
An embodiment of the present invention provides a kind of image element driving method and devices, due to applying the period by two period groups
At the first voltage and second voltage of from low to high, and the first absolute value can be applied within the application period by data line
More than the second absolute value, namely it is first applied with the voltage of the driving capability bigger than target voltage to pixel unit, can make
The voltage being applied on pixel unit overcomes dead resistance and parasitic capacitance and rises to target voltage in a relatively short period of time, into
And the charge efficiency of pixel unit is improved, keep the display brightness of each position on display panel more uniform.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of flow chart of image element driving method provided in an embodiment of the present invention；
Fig. 2 is that a kind of voltage of polarity same case provided in an embodiment of the present invention applies the schematic diagram of process；
Fig. 3 is that the voltage of another polarity same case provided in an embodiment of the present invention applies the signal of process；
Fig. 4 is that a kind of voltage of polarity different situations provided in an embodiment of the present invention applies the schematic diagram of process；
Fig. 5 is that the voltage of another polarity different situations provided in an embodiment of the present invention applies the schematic diagram of process；
Fig. 6 is a kind of method flow diagram of inquiry preset gray scale table provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of pixel driving device provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of determination unit provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of image element driving methods, and referring to Fig. 1, this method flow is specific as follows：
Step 101 determines first voltage.
Step 102 applies first voltage in first time period by data line to pixel unit, in second time period to picture
Plain unit applies second voltage, and first time period continuously applies the period with second time period composition one.
Wherein, the first absolute value is more than the second absolute value, and the first absolute value is the exhausted of first voltage and common voltage difference
To value, the second absolute value is the absolute value of second voltage and common voltage difference, and second voltage is picture in the current application period
The target voltage of plain unit charging.
For example, in the prior art, by data drive voltage by (that is to say that target voltage is from 10V (volt) drivings to 12V
12V), capacitance-resistance delay is 3us (microsecond), in embodiments of the present invention, it is assumed that is first applied to pixel unit in first time period
The voltage of 14V, the time that voltage is needed from 10V to 14V are also 3us, but will be reduced to the time of 12V and compare 1.5us
Less, in the charging time for increasing pixel unit, charge efficiency is improved.
In conclusion an embodiment of the present invention provides a kind of image element driving method, due to applying the period by two periods
Composition can apply the first voltage and second voltage of from low to high by data line within the application period, and first is absolute
Value is more than the second absolute value, namely the voltage of the driving capability bigger than target voltage is first applied with to pixel unit, can make
The voltage that must be applied on pixel unit overcomes dead resistance and parasitic capacitance and rises to target voltage in a relatively short period of time,
And then the charge efficiency of pixel unit is improved, keep the display brightness of each position on display panel more uniform.
It should be noted that in practical application, need by the corresponding voltage of a upper grayscale and second voltage respectively with it is public
Voltage is compared, and can voltage be applied process according to comparison result is divided into the identical two kinds of situations different with polarity of polarity, when
The corresponding voltage of a upper grayscale is above or is below common voltage with second voltage, then both polarity is identical；When a upper ash
The corresponding voltage of rank is higher than common voltage, and second voltage is less than common voltage less than common voltage or a upper gray scale voltage,
Second voltage is higher than common voltage, then the two polarity is different.For both different situations, apply in applying the period
One voltage needs appropriate adjust.
Specifically, Fig. 2, which is a kind of voltage of polarity same case provided in an embodiment of the present invention, applies the schematic diagram of process,
As shown in Fig. 2, a upper grayscale corresponding voltage C and second voltage B is above common voltage M, in first time period T1 to pixel
Unit applies first voltage A, applies second voltage B to pixel unit in second time period T2, and first voltage A is higher than the second electricity
B is pressed, and then the charge efficiency of pixel unit can be improved.Fig. 3 is another polarity same case provided in an embodiment of the present invention
Voltage apply the schematic diagram of process, as shown in figure 3, the corresponding voltage C ' of a upper grayscale and second voltage B ' are below common electrical
M is pressed, applies first voltage A ' to pixel unit in first time period T1, applies the second electricity to pixel unit in second time period T2
B ' is pressed, and first voltage A ' is less than second voltage B ', and then the charge efficiency of pixel unit can be improved.
Fig. 4 is that a kind of voltage of polarity different situations provided in an embodiment of the present invention applies the schematic diagram of process, such as Fig. 4 institutes
Show, the corresponding voltage C of a upper grayscale is less than common voltage M, and second voltage K is higher than common voltage M, in first time period T1 to picture
Plain unit applies first voltage J, applies second voltage K to pixel unit in second time period T2, and first voltage J is higher than second
Voltage K, and then the charge efficiency of pixel unit can be improved.Fig. 5 is that another polarity provided in an embodiment of the present invention is not sympathized with
The voltage of condition applies the schematic diagram of process, as shown in figure 5, the corresponding voltage C ' of a upper grayscale is higher than common voltage M, second voltage
K ' is less than in common voltage M, applies first voltage J ' to pixel unit in first time period T1, in second time period T2 to pixel
Unit applies second voltage K ', and first voltage J ' is less than second voltage K ', and then can improve the charge efficiency of pixel unit.
Exemplary, first time period and second time period can be set according to actual conditions, in the embodiment of the present invention, the
One period can be equal to second time period.For example, it is assumed that the prior art is 60Hz's (hertz) to pixel unit input frequency
Frequency in the embodiment of the present invention, can be that expand to frequency be 120Hz to 60Hz, an application period is divided into first by voltage
Period and second time period, each period correspond to a frame, and every two frame corresponds to an application period, and periodic cycle is applied with
First voltage and second voltage are stated, the first time period and second time period are equal, in the first frame in two frames, that is to say and apply
Add the first time period in the period, apply first voltage to pixel unit that is to say second time period in the second frame, to picture
Plain unit applies second voltage, i.e. target voltage.In addition, the first time period and second time period in the application period can not also
Equal, concrete numerical value can be set according to actual conditions, and the embodiment of the present invention is not construed as limiting this.
There are many mode of can be achieved, the embodiment of the present invention to be illustrated in following two achievable modes as an example for step 101：
The first can realize that mode, the embodiment of the present invention can be by inquiring preset gray scale table, according to a upper grayscale and mesh
Mark corresponding first grayscale of grayscale, it may be determined that the corresponding first voltage of the first grayscale.Correspondingly, Fig. 6 is the embodiment of the present invention
The method flow diagram of a kind of inquiry preset gray scale table provided, as shown in fig. 6, step 101 includes：
Step 1011 obtains a upper grayscale and target gray scale, grayscale when a upper grayscale is upper application end cycle, mesh
Mark grayscale is the corresponding grayscale of target voltage.
It should be noted that can be anti-by the pressure difference between the data line voltage applied to pixel unit and common voltage
Reflect the grayscale of pixel unit, wherein common voltage provided in an embodiment of the present invention is known voltage and to immobilize, when passing through number
It, then can be true by the pressure difference between the voltage applied to pixel unit and common voltage when applying voltage to pixel unit according to line
The grayscale for determining pixel unit that is to say when a grayscale is upper application end cycle corresponding to the charging voltage of pixel unit
Grayscale, target gray scale are the grayscale corresponding to the target voltage of pixel unit charging.
Step 1012 inquires preset gray scale table according to a upper grayscale and target gray scale, obtains a grayscale and target gray scale
Corresponding first grayscale.
Wherein, preset gray scale table record has multiple second grayscale and multiple third grayscale and any second grayscale and appoints
Grayscale corresponding to one third grayscale, the second grayscale is corresponding to apply the period as corresponding apply the period upper one week of third grayscale
Phase.
In the embodiment of the present invention, preset gray scale table includes positivity grayscale table and negativity grayscale table, specifically, table 1 is this hair
A kind of positivity grayscale table that bright embodiment provides, table 2 is a kind of negativity grayscale table provided in an embodiment of the present invention, wherein positivity
Second grayscale of grayscale table record is identical as the polarity of third grayscale, the second grayscale and the third grayscale of negativity grayscale table record
Polarity is different.
In practical application, the embodiment of the present invention can inquire preset gray scale table according to a upper grayscale and target gray scale, when pre-
If recorded a grayscale and the corresponding grayscale of target gray scale in grayscale table, corresponding grayscale is determined as the first grayscale；When
When not recording a grayscale and the corresponding grayscale of target gray scale in preset gray scale table, according to preset gray scale table, inserted using linear
Reinforcing method determines the first grayscale.
It is exemplary, for the above grayscale is identical as the polarity of target gray scale, as shown in table 1, remember when in preset gray scale table
When being loaded with a grayscale and the corresponding grayscale of target gray scale, for example, when a upper grayscale is a, target gray scale 2a then passes through inquiry
Preset gray scale table is it is found that a upper grayscale and corresponding first grayscale of target gray scale are b4；When not recorded in preset gray scale table
When one grayscale and the corresponding grayscale of target gray scale, for example, when a upper grayscale is 3a/2, target gray scale 3a/2, inserted using linear
Reinforcing method can determine that a grayscale the first grayscale corresponding with target gray scale is 3a/2.
Wherein, linear interpolation method refers to carrying out interpolation according to space line path, and specific algorithm is：One three can be established
Dimension coordinate system, X-coordinate indicate that the second grayscale, Y coordinate indicate that third grayscale, Z coordinate indicate the first grayscale, and inquiry table 1 is it is found that work as
A upper grayscale is a, target gray scale a, then a upper grayscale the first grayscale corresponding with target gray scale is a, is sat in the three-dimensional of foundation
Set the point to L points in mark system, and the L coordinate be (a, a, a)；When a upper grayscale is 2a, target gray scale 2a, then upper one
Grayscale the first grayscale corresponding with target gray scale is 2a, and the point is set to P points, and point P in the three-dimensional system of coordinate of foundation
Coordinate is (2a, 2a, 2a).In the three-dimensional system of coordinate, when X-coordinate is 3a/2, Y coordinate 3a/2, and 3a/2 is between a and 2a
Midpoint, then by three-dimensional system of coordinate it is found that corresponding Z coordinate be 3a/2, then the coordinate of point O be (3a/2,3a/2,3a/2),
It that is to say that a grayscale is 3a/2, target gray scale 3a/2, a upper grayscale the first grayscale corresponding with target gray scale is 3a/2.
Table 1
Table 2
Whether the embodiment of the present invention can identical by detecting the polarity of a upper grayscale and target gray scale, to inquire default ash
Rank table.It, can be with inquiry table 1 when a upper grayscale is identical as the polarity of target gray scale；When the polarity of upper a grayscale and target gray scale
It, can be with inquiry table 2 when different.
It should be noted that the whether identical specific method of polarity of the upper grayscale of detection and target gray scale is：When upper one
The corresponding voltage of grayscale voltage corresponding with target gray scale is above common voltage or the corresponding voltage of a upper grayscale and mesh
When the corresponding voltage of mark grayscale is below common voltage, then a upper grayscale is identical as the polarity of target gray scale；When a upper grayscale pair
The voltage answered is higher than common voltage, and the corresponding voltage of target gray scale is less than common voltage, conversely, the corresponding voltage of target gray scale is high
In common voltage, when the corresponding voltage of a upper grayscale is less than common voltage, then a upper grayscale is different from the polarity of target gray scale.
For example, when common voltage is 8V, the corresponding voltage of a upper grayscale is 10V, the corresponding target voltage of target gray scale
For 12V, then the corresponding voltage 10V of upper grayscale voltage 12Vs corresponding with target gray scale is all higher than common voltage 8V, i.e., a upper ash
Rank is identical as the polarity of target gray scale, can determine a upper grayscale corresponding with target gray scale first by inquiring positivity grayscale table
Grayscale；When common voltage is 8V, the corresponding voltage of a upper grayscale is 10V, and the corresponding target voltage of target gray scale is 4V, then on
The corresponding voltage 10V of one grayscale is more than common voltage 8V, and the corresponding voltage 4V of target gray scale is less than common voltage 8V, i.e., a upper ash
Rank is different from the polarity of target gray scale, can determine a upper grayscale corresponding with target gray scale first by inquiring negativity grayscale table
Grayscale.
The corresponding data voltage of first grayscale is determined as first voltage by step 1013.
Specifically, the embodiment of the present invention can determine that a upper grayscale is corresponding with target gray scale by inquiring preset gray scale table
First grayscale, wherein the first grayscale can reflect the pressure difference between the corresponding data voltage of the first grayscale and common voltage, can be with
The corresponding first voltage of the first grayscale is determined according to pressure difference and common voltage.
Wherein, the corresponding first voltage of the first grayscale is higher than the corresponding target voltage of target gray scale or the first grayscale
Corresponding first voltage is less than the corresponding target voltage of target gray scale, that is to say and is first applied with to pixel unit than target voltage
The first voltage of driving capability bigger can make the voltage being applied on pixel unit overcome parasitic electricity in a relatively short period of time
Resistance and parasitic capacitance simultaneously reach target voltage, and then can improve the charge efficiency of pixel unit, make each position on display panel
The display brightness set is more uniform.
Second of achievable mode, the embodiment of the present invention can determine first voltage by voltage computing formula.Accordingly
, step 101 includes：
Voltage computing formula may be used and calculate first voltage.
Wherein, which is：
Vo=α * R*C*Vt/T1+V1.
It should be noted that in voltage computing formula, Vo is first voltage, and unit can be volt, and α is default adjusts
Integral coefficient, R are the dead resistance on pixel unit, and unit can be ohm, and C is the parasitic capacitance on pixel unit, list
Position can be farad, and T1 is the duration of first time period, and unit can be the second, and Vt is target voltage, and unit can be volt
Spy, V1 are the corresponding voltage of a upper grayscale, and unit can be volt, and a upper grayscale is upper one grayscale for applying the period.
Exemplary, when target voltage Vt is 12V, the corresponding voltage V1 of a upper grayscale is 10V, parasitic electric on pixel unit
It is 3.5 kilohms to hinder R, and the parasitic capacitance C on pixel unit can be 400pF (pico farad), and the duration T1 of first time period is
7us, when default regulation coefficient α is 0.83, by voltage computing formula Vo=α * R*C*Vt/T1+V1, obtaining first voltage Vo is
14V。
It should be noted that the sequencing of image element driving method step provided in an embodiment of the present invention can carry out suitably
Adjustment, step according to circumstances can also accordingly be increased and decreased, any one skilled in the art the invention discloses
Technical scope in, the method that can readily occur in variation should be covered by the protection scope of the present invention, therefore no longer superfluous
It states.
In conclusion an embodiment of the present invention provides a kind of image element driving method, due to applying the period by two periods
Composition can apply the first voltage and second voltage of from low to high by data line within the application period, and first is absolute
Value is more than the second absolute value, namely the voltage of the driving capability bigger than target voltage is first applied with to pixel unit, can make
The voltage that must be applied on pixel unit overcomes dead resistance and parasitic capacitance and rises to target voltage in a relatively short period of time,
And then the charge efficiency of pixel unit is improved, keep the display brightness of each position on display panel more uniform.
Referring to Fig. 7, an embodiment of the present invention provides a kind of pixel driving device 50, which includes：Determination unit 501,
Applying unit 502.
Determination unit 501, for determining first voltage.
Applying unit 502, for applying first voltage to pixel unit in first time period by data line, at second
Between section apply second voltage to pixel unit, first time period and second time period composition one continuously applies the period.
Wherein, the first absolute value is more than the second absolute value, and the first absolute value is the exhausted of first voltage and common voltage difference
To value, the second absolute value is the absolute value of the second voltage and common voltage difference, and second voltage is the current application period
The target voltage of middle pixel unit charging.
In conclusion an embodiment of the present invention provides a kind of image element driving method, due to applying the period by two periods
Composition can apply the first voltage and second voltage of from low to high by data line within the application period, and first is absolute
Value is more than the second absolute value, namely the voltage of the driving capability bigger than target voltage is first applied with to pixel unit, can make
The voltage that must be applied on pixel unit overcomes dead resistance and parasitic capacitance and rises to target voltage in a relatively short period of time,
And then the charge efficiency of pixel unit is improved, keep the display brightness of each position on display panel more uniform.
Optionally, as shown in figure 8, determination unit 501, including：Subelement 5011 is obtained, subelement 5012 is inquired, is determined
Subelement 5013.
Subelement 5011 is obtained, for obtaining a upper grayscale and target gray scale, a upper grayscale is upper application end cycle
When grayscale, target gray scale be the corresponding grayscale of target voltage.
Subelement 5012 is inquired, for inquiring preset gray scale table according to a upper grayscale and target gray scale, obtains a grayscale
The first grayscale corresponding with target gray scale, preset gray scale table record have multiple second grayscale and multiple third grayscale and any
Grayscale corresponding to second grayscale and any third grayscale, the second grayscale corresponding application period are the corresponding application of third grayscale
A upper period in period.
Determination subelement 5013, for the corresponding data voltage of the first grayscale to be determined as first voltage.
Specifically, preset gray scale table includes positivity grayscale table and negativity grayscale table, the second grayscale of positivity grayscale table record
Identical as the polarity of third grayscale, the second grayscale of negativity grayscale table record is different from the polarity of third grayscale.
Wherein, subelement 5012 is inquired, is used for：
Whether the polarity of the upper grayscale of detection and target gray scale is identical.
When a upper grayscale is identical as the polarity of target gray scale, positivity grayscale table is inquired.
When the polarity difference of a upper grayscale and target gray scale, negativity grayscale table is inquired.
Optionally, determination unit 501 are used for：
First voltage is calculated using voltage computing formula.
Wherein, voltage computing formula is：
Vo=α * R*C*Vt/T1+V1.
In voltage computing formula, Vo is first voltage, and α is default regulation coefficient, and R is the parasitism electricity on pixel unit
Resistance, C are the parasitic capacitance on pixel unit, and T1 is the duration of first time period, and Vt is target voltage, and V1 corresponds to for a upper grayscale
Voltage, a upper grayscale be it is upper one apply the period grayscale.
In conclusion an embodiment of the present invention provides a kind of pixel driving device, since applying unit applies the period by two
A period composition, can apply the first voltage and second voltage of from low to high by data line within the application period, and
First absolute value is more than the second absolute value, namely the electricity of the driving capability bigger than target voltage is first applied with to pixel unit
Pressure, can make the voltage being applied on pixel unit overcome dead resistance and parasitic capacitance in a relatively short period of time and rise to
Target voltage, and then the charge efficiency of pixel unit is improved, keep the display brightness of each position on display panel more uniform.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
It with the specific work process of unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of image element driving method, which is characterized in that including：
Preset gray scale table is inquired according to a upper grayscale and target gray scale, is corresponded to obtaining a upper grayscale and the target gray scale
The first grayscale, and the corresponding data voltage of first grayscale is determined as first voltage, a upper grayscale is upper one to apply
It is the corresponding grayscale of target voltage to add grayscale when end cycle, the target gray scale, and the preset gray scale table record has multiple
Grayscale corresponding to second grayscale and multiple third grayscale and any second grayscale and any third grayscale, second ash
Rank is corresponding to apply the upper period that the period is the third grayscale corresponding application period；Alternatively, using voltage computing formula
Calculate the first voltage, wherein the voltage computing formula is：Vo=α * R*C*Vt/T1+Vl, Vo are the first voltage,
α is default regulation coefficient, and R is the dead resistance on pixel unit, and C is the parasitic capacitance on the pixel unit, T1 first
The duration of period, Vt are the target voltage, and Vl is the corresponding voltage of a upper grayscale；
Apply the first voltage to the pixel unit in the first time period by data line, in second time period to institute
It states pixel unit and applies second voltage, the first time period continuously applies the period with second time period composition one；
Wherein, the first absolute value is more than the second absolute value, and first absolute value is the first voltage and common voltage difference
Absolute value, second absolute value be the second voltage and the common voltage difference absolute value, the second voltage
For the current target voltage for applying pixel unit charging described in the period.
2. according to the method described in claim 1, it is characterized in that, the preset gray scale table includes positivity grayscale table and negativity ash
Second grayscale of rank table, positivity grayscale table record is identical with the polarity of third grayscale, the negativity grayscale table record the
Two grayscale are different from the polarity of third grayscale；
It is described that preset gray scale table is inquired according to a upper grayscale and target gray scale, including：
It is whether identical as the polarity of the target gray scale to detect a upper grayscale；
When the upper grayscale is identical as the polarity of the target gray scale, the positivity grayscale table is inquired；
When the polarity difference of a upper grayscale and the target gray scale, the negativity grayscale table is inquired.
3. a kind of pixel driver driving device, which is characterized in that including：
First determination unit or the second determination unit；Wherein, the first determination unit is used for：It is looked into according to a upper grayscale and target gray scale
Preset gray scale table is ask, to obtain a upper grayscale and corresponding first grayscale of the target gray scale, and by first grayscale
Corresponding data voltage is determined as first voltage, grayscale when a upper grayscale is upper application end cycle, the target
Grayscale is the corresponding grayscale of target voltage, and the preset gray scale table record has multiple second grayscale and multiple third grayscale, and
Grayscale corresponding to any second grayscale and any third grayscale, second grayscale corresponding application period are third ash
The rank corresponding upper period for applying the period；Second determination unit is used for：The first voltage is calculated using voltage computing formula,
Wherein, the voltage computing formula is：Vo=α * R*C*Vt/T1+Vl, Vo are the first voltage, and α is default regulation coefficient, R
For the dead resistance on pixel unit, C is the parasitic capacitance on the pixel unit, and T1 is the duration of first time period, and Vt is
The target voltage, Vl are the corresponding voltage of a upper grayscale；
Applying unit, for applying the first voltage to the pixel unit in the first time period by data line,
Second time period applies second voltage to the pixel unit, and the first time period and second time period composition one are continuous
The application period；
Wherein, the first absolute value is more than the second absolute value, and first absolute value is the first voltage and common voltage difference
Absolute value, second absolute value be the second voltage and the common voltage difference absolute value, the second voltage
For the current target voltage for applying pixel unit charging described in the period.
4. device according to claim 3, which is characterized in that the preset gray scale table includes positivity grayscale table and negativity ash
Second grayscale of rank table, positivity grayscale table record is identical with the polarity of third grayscale, the negativity grayscale table record the
Two grayscale are different from the polarity of third grayscale；
First determination unit is additionally operable to：
It is whether identical as the polarity of the target gray scale to detect a upper grayscale；
When the upper grayscale is identical as the polarity of the target gray scale, the positivity grayscale table is inquired；
When the polarity difference of a upper grayscale and the target gray scale, the negativity grayscale table is inquired.
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| CN107068086B (en) * | 2017-03-30 | 2019-01-25 | 京东方科技集团股份有限公司 | Pixel charging method and circuit |
| CN109887472A (en) * | 2019-04-12 | 2019-06-14 | 安徽新华学院 | A kind of TFT-LCD pixel capacitance quick-charge function solution |
| CN113763858B (en) * | 2021-08-31 | 2022-05-10 | 惠科股份有限公司 | Display panel driving method, device, computer equipment and storage medium |
| CN114519985A (en) * | 2022-01-21 | 2022-05-20 | 重庆惠科金渝光电科技有限公司 | Pixel charging method and liquid crystal display device |
| CN116758849A (en) * | 2023-05-25 | 2023-09-15 | 重庆惠科金渝光电科技有限公司 | Display panel driving method and display device |
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