CN105096894B - A kind of image retention removing method, drive system and display device - Google Patents
A kind of image retention removing method, drive system and display device Download PDFInfo
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- CN105096894B CN105096894B CN201510591014.XA CN201510591014A CN105096894B CN 105096894 B CN105096894 B CN 105096894B CN 201510591014 A CN201510591014 A CN 201510591014A CN 105096894 B CN105096894 B CN 105096894B
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Abstract
A kind of image retention removing method of present invention offer, drive system and display device.The image retention removing method includes：The shake control parameter of default tonal gradation reference voltage and/or common voltage or gray scale voltage；Tonal gradation reference voltage and/or common voltage or gray scale voltage carry out voltage raising and/or reduce to shake according to preset shake control parameter, to eliminate the image retention during liquid crystal display is shown.The image retention removing method can make the shake of tonal gradation reference voltage and/or common voltage or gray scale voltage control more accurate, to which the image retention during liquid crystal display is shown can not only be eliminated, and the eradicating efficacy of image retention can be made more preferable, which does not interfere with the normal display of liquid crystal display also.
Description
Technical field
The present invention relates to display technology fields, and in particular, to a kind of image retention removing method, drive system and display dress
It sets.
Background technology
In flat-panel monitor, liquid crystal display is extensive since device is thin, light-weight, low in energy consumption and low electromagnetic
Applied on the massaging devices such as such as mobile phone, computer, TV and personal digital assistant.
Image retention is one of notable defect existing for current liquid crystal display, and so-called image retention refers to that liquid crystal display is aobvious for a long time
Show same fixed picture, when screen switching to next picture, can indistinctly remain the image of a picture.In panel from
Son can be moved along direction of an electric field toward liquid crystal upper and lower base plate, is gathered in oriented layer, the ion of aggregation will produce electrostatic, work as ion
The electrostatic that generates of concentration when being enough to change the transmitance of liquid crystal display, the display of liquid crystal display can be made difference occur, when
When switching to next picture, the ion of aggregation can not leave oriented layer at once, continue to keep original image, therefore scheme
As residual.
In order to solve image retention problem, currently used method has：1. using the special elimination eliminated figure and carry out image retention,
2. according to the difference of display screen distance end signal voltage difference delta Vp, using the method that staggeredly image retention is eliminated in driving, 3. pass through the period
Property regulation resistance to which periodic adjustment tonal gradation reference voltage or public electrode voltages are come the method that reduces image retention.
But above method respectively has disadvantage:1. method can not normally be shown using figure is eliminated when eliminating image retention.Method
2. being only capable of the signal difference at compensation display screen distance end.3. periodic adjustment resistance is limited to the eradicating efficacy of image retention for method.
Invention content
The present invention is directed to the above-mentioned technical problems in the prior art, provides a kind of image retention removing method, drive system
And display device.The image retention removing method can make the shake of tonal gradation reference voltage and/or common voltage or gray scale voltage
Control is more accurate, to eliminate the image retention during liquid crystal display is shown, and the eradicating efficacy of image retention can be made more preferable,
The image retention removing method does not interfere with the normal display of liquid crystal display also.
The present invention provides a kind of image retention removing method, including：Default tonal gradation reference voltage and/or common voltage or
The shake control parameter of person's gray scale voltage；The tonal gradation reference voltage and/or the common voltage or the grayscale electricity
It carries out voltage raising and/or reduces to shake according to the preset shake control parameter at all, to eliminate during liquid crystal display shows
Image retention.
Preferably, the tonal gradation reference voltage and/or the common voltage or the gray scale voltage are according to default
The shake control parameter carry out periodic voltage around respective central value and raise and reduce shake.
Preferably, the shake control parameter of the default tonal gradation reference voltage includes：The default tonal gradation ginseng
Examine the central value of voltage；It presets shake period of the tonal gradation reference voltage, jitter range, jitter amplitude and needs to shake
Grayscale；
The shake control parameter of the default common voltage includes：Preset the central value of the common voltage；It is default described
Shake period, jitter range and the jitter amplitude of common voltage；
Wherein, the shake period refers to the tonal gradation reference voltage or the common voltage is opened from respective central value
Begin, the time used when turning again to respective central value after overvoltage raises and reduces shake；The jitter range refers to institute
State the difference between the maxima and minima of tonal gradation reference voltage or the common voltage within a shake period
Value；The jitter amplitude refers to the tonal gradation reference voltage or the variation of primary voltage is often raised and lowered in the common voltage
Amount；It is described that the grayscale shaken is needed to refer to the voltage value that the tonal gradation reference voltage needs are shaken.
Preferably, the shake control parameter of the preset gray scale voltage includes：Set the packet parameters of the gray scale voltage；
Preset the grayscale that shake period, jitter range, jitter amplitude and the needs of the gray scale voltage are shaken；
Wherein, the shake period refers to the gray scale voltage since central value, after shake is raised and lowered in overvoltage
Turn again to the time used when its central value；The jitter range refers to the gray scale voltage within a shake period
Difference between maxima and minima；The jitter amplitude refers to the variation of the voltage of the adjacent double pump of the gray scale voltage
Amount；It is described that the grayscale shaken is needed to refer to the voltage value that the gray scale voltage needs are shaken.
Preferably, the shake control parameter of the default tonal gradation reference voltage and common voltage includes：It prestores described
The different temperatures range of environment temperature residing for liquid crystal display and the tonal gradation reference voltage and the common voltage
The mapping table of corresponding shake control parameter；
The tonal gradation reference voltage and the common voltage carry out voltage according to the preset shake control parameter
Shake, which is raised and lowered, includes：The environment temperature residing for the liquid crystal display is acquired, and according to where the environment temperature
Temperature range selects shake control parameter corresponding with the temperature range from the mapping table；According to this shake
Tonal gradation reference voltage and a common voltage described in one group of control parameter generation.
Preferably, the ranging from 8-3000 frames in the shake period of the tonal gradation reference voltage, the common voltage
The jitter range of the ranging from 4-3000 frames in shake period, the tonal gradation reference voltage and the common voltage is 0-
The jitter amplitude range of 400mV, the tonal gradation reference voltage and the common voltage is 0-100mV, described gray scale etc.
The grey-scale range that the needs of grade reference voltage are shaken is 191-255, and total grayscale of the tonal gradation reference voltage is 256.
Preferably, the ranging from 8-3000 frames in the shake period of the gray scale voltage, the jitter range of the gray scale voltage
For 0-400mV, the jitter amplitude ranging from 0-100mV of the gray scale voltage, the grayscale model that the needs of the gray scale voltage are shaken
It encloses for 191-255, total grayscale of the gray scale voltage is 256.
The present invention also provides a kind of drive systems, for eliminating the image retention during liquid crystal display is shown, including shake control
Module and output module, the shake control module for receive preset tonal gradation reference voltage and/or common voltage or
The shake control parameter of person's gray scale voltage, and controlled described in the output module output according to the preset shake control parameter
The electricity for increase and/or reduce shake of tonal gradation reference voltage and/or the common voltage or the gray scale voltage
Pressure.
Preferably, the shake control module and the output module are arranged at tonal gradation reference voltage and generate chip
In.
Preferably, the shake control module is arranged in sequence controller, and the output module is arranged in tonal gradation
Reference voltage generates in chip.
Preferably, further include temperature collecting module and memory module, the temperature collecting module and the memory module are equal
It is connect with the shake control module, the memory module is arranged in the sequence controller；
The acquisition module is used to acquire the environment temperature residing for the liquid crystal display, and the environment temperature of acquisition is passed
It send to the shake control module；The memory module is used to store the not equality of temperature of the environment temperature residing for the liquid crystal display
Spend the mapping table of range and the tonal gradation reference voltage and the corresponding shake control parameter of the common voltage；The shake
Control module is used to be selected from the mapping table and the temperature range pair according to the temperature range where the environment temperature of acquisition
The shake control parameter answered, and ash described in one group of the output module output is controlled according to this shake control parameter
Spend grade reference voltage and a common voltage.
Preferably, the shake control module is arranged in sequence controller, and the output module is arranged in source drive
In chip.
Preferably, further include grouping module and division module, the grouping module be arranged in the sequence controller and
It is connect with the shake control module, the division module is arranged in the source driving chip and connects with the output module
It connects；
Gray scale voltage divides described in the division module be used to generate the source driving chip one group, with shape
At multigroup gray scale voltage；The grouping module is used for the packet parameters according to setting to more in multigroup gray scale voltage
A gray scale voltage is grouped again；The shake control module is used for the group result again according to the grouping module
Control the output module export the gray scale voltage around its central value carry out periodic voltage raise and reduce shake
Voltage.
The present invention also provides a kind of display devices, including above-mentioned drive system.
Beneficial effects of the present invention：Image retention removing method provided by the present invention, by presetting tonal gradation reference voltage
And/or the shake control parameter of common voltage or gray scale voltage；Make tonal gradation reference voltage and/or common voltage or
Gray scale voltage carries out voltage dithering according to preset shake control parameter, should to eliminate the image retention during liquid crystal display is shown
The method that image retention removing method is eliminated relative to traditional image retention, does not interfere with the normal display of liquid crystal display not only, but also
The shake of tonal gradation reference voltage and/or common voltage or gray scale voltage control can be made more accurate, to make image retention
Eradicating efficacy is more preferable.
Drive system provided by the present invention shakes control module and output module by setting, can not only eliminate liquid
Crystal display show in image retention, and the eradicating efficacy of image retention can be made more preferable.
It is aobvious can not only to eliminate the display device by using above-mentioned drive system for display device provided by the present invention
Image retention when showing, and can make the display device show when image retention eradicating efficacy it is more preferable.
Description of the drawings
Fig. 1 is the flow chart of image retention removing method in the embodiment of the present invention 1；
Fig. 2 is the shake flow chart of common voltage in embodiment 1；
Fig. 3 is the shake sequence diagram of common voltage in embodiment 1；
Fig. 4 is the shake flow chart of tonal gradation reference voltage in embodiment 1；
Fig. 5 is the shake sequence diagram of tonal gradation reference voltage in embodiment 1；
Fig. 6 is the functional block diagram of drive system in embodiment 1；
Fig. 7 is the flow chart of image retention removing method in the embodiment of the present invention 2；
Fig. 8 is the shake flow chart of gray scale voltage in embodiment 2；
Fig. 9 is the shake sequence diagram of gray scale voltage in embodiment 2；
Figure 10 is the functional block diagram of drive system in embodiment 2；
Figure 11 is the flow chart of image retention removing method in the embodiment of the present invention 3；
Figure 12 is the functional block diagram of drive system in embodiment 3.
Reference sign therein：
1. shaking control module；2. output module；3. grouping module；4. division module；5. temperature collecting module；6. storage
Module；T. the jitter amplitude period of common voltage；T1. the jitter amplitude period of tonal gradation reference voltage；T2. gray scale voltage
The jitter amplitude period；T. the shake period of common voltage；T1. the shake period of tonal gradation reference voltage；T2. gray scale voltage
Shake the period；H. the jitter amplitude of common voltage；H1. the jitter amplitude of tonal gradation reference voltage；H2. the shake of gray scale voltage
Amplitude；H. the jitter range of common voltage；H1. the jitter range of tonal gradation reference voltage；H2. the shake model of gray scale voltage
It encloses.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and it is embodied
Mode is described in further detail a kind of image retention removing method provided by the present invention, drive system and display device.
The present invention provides a kind of image retention removing method, including：Default tonal gradation reference voltage and/or common voltage or
The shake control parameter of person's gray scale voltage；Tonal gradation reference voltage and/or common voltage or gray scale voltage are according to preset
It shakes control parameter to carry out voltage raising and/or reduce shake, to eliminate the image retention during liquid crystal display is shown.
Correspondingly, it the present invention also provides a kind of drive system, for eliminating the image retention during liquid crystal display is shown, including trembles
Dynamic control module and output module, shake control module for receive preset tonal gradation reference voltage and/or common voltage,
Or the shake control parameter of gray scale voltage, and output module output gray level grade ginseng is controlled according to preset shake control parameter
Examine the voltage for increase and/or reduce shake of voltage and/or common voltage or gray scale voltage.
The image retention removing method is by presetting trembling for tonal gradation reference voltage and/or common voltage or gray scale voltage
Dynamic control parameter；Make tonal gradation reference voltage and/or common voltage or gray scale voltage according to preset shake control parameter
Voltage dithering is carried out, to eliminate the image retention during liquid crystal display is shown, which disappears relative to traditional image retention
The method removed, does not interfere with the normal display of liquid crystal display not only, but also can make tonal gradation reference voltage and/or common electrical
The shake control of pressure or gray scale voltage is more accurate, to keep the eradicating efficacy of image retention more preferable.
Embodiment 1：
The present embodiment provides a kind of image retention removing methods, as shown in Figure 1, including：
Step S1：The shake control parameter of default tonal gradation reference voltage and common voltage.
In this step, the shake control parameter of default tonal gradation reference voltage includes：Default tonal gradation is with reference to electricity
The central value of pressure；The grayscale that shake period, jitter range, jitter amplitude and the needs of default tonal gradation reference voltage are shaken.
The shake control parameter of default common voltage includes：The central value of default common voltage；The shake period of default common voltage trembles
Dynamic range and jitter amplitude.
Wherein, the shake period refers to tonal gradation reference voltage or common voltage since respective central value, through overvoltage
The time used when respective central value is turned again to after raising and reducing shake.Jitter range refer to tonal gradation reference voltage or
Common voltage shakes the difference between the maxima and minima in the period at one.Jitter amplitude refers to tonal gradation reference voltage
Or the variable quantity of primary voltage is often raised and lowered in common voltage.It needs the grayscale shaken to refer to tonal gradation reference voltage needs to tremble
Dynamic voltage value.
In the present embodiment, the ranging from 8-3000 frames in the shake period of tonal gradation reference voltage, the shake of common voltage
The jitter range of the ranging from 4-3000 frames in period, tonal gradation reference voltage and common voltage is 0-400mV, tonal gradation
The jitter amplitude range of reference voltage and common voltage is 0-100mV, the grayscale that the needs of tonal gradation reference voltage are shaken
Total grayscale of ranging from 191-255, tonal gradation reference voltage are 256.
In the present embodiment, the shake control parameter of tonal gradation reference voltage and common voltage can root within the above range
It is arbitrarily set according to the actual needs for eliminating image retention, this makes during the elimination of image retention, tonal gradation reference voltage and public
The shake control of voltage is more accurate, so as to keep the eradicating efficacy of image retention more preferable.
Step S2：Tonal gradation reference voltage and common voltage are according to preset shake control parameter in its is respective
Center value carries out periodic voltage and raises and reduces shake, to eliminate the image retention during liquid crystal display is shown.
Wherein, the specific dither process of common voltage is：As shown in Figures 2 and 3,
Step S201：Since the central value of common voltage VCOM, counter starts accumulation and calculates frame number.
Wherein, after a jitter amplitude h is often raised and lowered with common voltage VCOM in the central value of common voltage VCOM
The common voltage after a jitter amplitude h is often raised and lowered in the duration all same of common voltage value, common voltage VCOM
The duration of value is the jitter amplitude period t of common voltage VCOM, and the jitter amplitude period t=of common voltage VCOM is (public
The jitter range H of the jitter amplitude h/ common voltages VCOM of common voltage VOM) × common voltage VCOM shake cycle T.Common electrical
The jitter amplitude period t of pressure VCOM is the integral multiple of a frame and is at least a frame.
Step S202：When reaching preset frame number, common voltage VCOM become larger by preset jitter amplitude h (it is assumed that
Common voltage VCOM progress, which first increases afterwards, reduces shake).
In the step, when reaching preset frame number, just past a jitter amplitude period t of common voltage VCOM,
At this point, common voltage VCOM increases a jitter amplitude h.
Step S203：The step same as step S202 is repeated, until after n jitter amplitude period t of experience, common voltage
VCOM is increased to maximum preset value (i.e. common voltage VCOM shakes the maximum value in cycle T at one).
Step S204：When reaching preset frame number, common voltage VCOM becomes smaller by preset jitter amplitude h.
In the step, when reaching preset frame number, just past a jitter amplitude period t of common voltage VCOM,
At this point, common voltage VCOM reduces a jitter amplitude h.
Step S205：The step same as step S204 is repeated, until after m jitter amplitude period t of experience, common voltage
VCOM is reduced to minimum preset value (i.e. common voltage VCOM shakes the minimum value in cycle T at one).
So far, a shake cycle T terminates.Repeat the above steps S201-S205, is formed and periodically raises and reduces shake
Common voltage VCOM.The periodic jitter of common voltage VCOM, which is equivalent to, periodically applies generating positive and negative voltage to liquid crystal to increase
The rotation of the positive negative sense of liquid crystal molecule, this cancelling out each other for generating positive and negative voltage of periodicity can reduce the polarization of liquid crystal molecule, to
Image retention caused by reducing charge accumulation.
As shown in Figure 4 and Figure 5, the specific dither process of tonal gradation reference voltage GN is：
Step S211：Since the central value of tonal gradation reference voltage GN, counter starts accumulation and calculates frame number.
Wherein, the central value of tonal gradation reference voltage GN is often raised and lowered one with tonal gradation reference voltage GN and trembles
The duration all same of tonal gradation reference voltage level after dynamic amplitude h1, tonal gradation reference voltage GN are often raised and lowered
The duration of tonal gradation reference voltage level after one jitter amplitude h1 is the jitter amplitude of tonal gradation reference voltage
Jitter amplitude period t1=(the jitter amplitude h1/ ashes of tonal gradation reference voltage GN of period t1, tonal gradation reference voltage GN
Spend the jitter range H1 of grade reference voltage GN) the shake cycle T 1 of × tonal gradation reference voltage GN.Tonal gradation is with reference to electricity
The jitter amplitude period t1 of pressure GN is the integral multiple of two frames and is at least two frames, this is because parity frame tonal gradation reference voltage
GN polarity is on the contrary, so must keep the integral multiple that the jitter amplitude period t1 of tonal gradation reference voltage GN is two frames and minimum
For two frames, it can just make parity frame tonal gradation reference voltage GN symmetrical.
Step S212：When reaching preset frame number, tonal gradation reference voltage GN becomes larger (this by preset jitter amplitude h1
In assume that tonal gradation reference voltage GN progress first increases afterwards and reduce shake).
In the step, when reaching preset frame number, just past a jitter amplitude of tonal gradation reference voltage GN
Period t1, at this point, tonal gradation reference voltage GN increases a jitter amplitude h1.
Step S213：The step same as step S212 is repeated, until after n jitter amplitude period t1 of experience, gray scale etc.
Grade reference voltage GN is increased to maximum preset value (i.e. tonal gradation reference voltage GN shakes the maximum value in cycle T 1 at one).
Step S214：When reaching preset frame number, tonal gradation reference voltage GN becomes smaller by preset jitter amplitude h1.
In the step, when reaching preset frame number, just past a jitter amplitude of tonal gradation reference voltage GN
Period t1, at this point, tonal gradation reference voltage GN reduces a jitter amplitude h1.
Step S215：The step same as step S214 is repeated, until after m jitter amplitude period t1 of experience, gray scale etc.
Grade reference voltage GN is reduced to minimum preset value (i.e. tonal gradation reference voltage GN shakes the minimum value in cycle T 1 at one).
So far, a shake cycle T 1 terminates.Repeat the above steps S211-S215, is formed periodically to raise and reduce and be trembled
Dynamic tonal gradation reference voltage GN.
Due to tonal gradation reference voltage GN be high gray voltage when, liquid crystal display be more prone to occur image retention, therefore
It is shaken without being done to all tonal gradation reference voltage GN, it is only necessary to the tonal gradation reference voltage GN of high gray be made to carry out week
Phase property is shaken, such as：In the present embodiment, it is assumed that one group of tonal gradation reference voltage be it is N number of, only to grayscale value is 255 first
Tonal gradation reference voltage G1 and n-th tonal gradation reference voltage GN do a wide range of shake；To second that grayscale value is 254
Tonal gradation reference voltage G2 and the N-1 tonal gradation reference voltage GN-1 do small range shake；To grayscale value below 191
Other tonal gradation reference voltages do not do and shake.Meanwhile the jitter range H1 of the tonal gradation reference voltage to different grayscale
Different settings can also be carried out with jitter amplitude h1, finally guarantees the tonal gradation reference voltage by periodic jitter
And common voltage, the accumulation of charge is reduced, to reduce the possibility of image retention generation.
It should be noted that can also the only shake control of one of them in default tonal gradation reference voltage and common voltage
Parameter processed one of only allows in tonal gradation reference voltage and common voltage to carry out periodic jitter, equally can be right
Image retention is eliminated.
Based on above-mentioned image retention removing method, the present embodiment also provides a kind of drive system corresponding to the image retention removing method,
As shown in fig. 6, including shake control module 1 and output module 2, shake control module 1 is for receiving preset tonal gradation ginseng
The shake control parameter of voltage and common voltage is examined, and 2 output gray level of output module is controlled according to preset shake control parameter
The voltage that shake is raised and reduced around its respective central value progress periodic voltage of grade reference voltage and common voltage.
In the present embodiment, shakes control module 1 and output module 2 is arranged at tonal gradation reference voltage and generates chip
In (i.e. P-Gamma chips).Wherein, the built-in or plug-in read-only memory in P-Gamma chips is arranged in shake control module 1
In, shake control parameter can be by being artificially written in the read-only memory.2 energy basis of output module is stored in P-Gamma
Different shake control parameters in the read-only memory of chip export multigroup different tonal gradation reference voltage and common electrical
Pressure, to provide the tonal gradation reference voltage and common voltage of periodic jitter.
It should be noted that shake control module 1 can also be arranged in sequence controller, output module 2 is arranged in ash
Grade reference voltage is spent to generate in chip (P-Gamma chips).So set, being due to general transistor in P-Gamma chips
Quantity is smaller, and the logic function that increase shake is complex, using the built-in shake control module 1 of sequence controller, passes through I2C
It communicates to realize the signal transmission between shake control module 1 and output module 2, without being further added by logic in P-Gamma chips
The complexity of function further improves the operational paradigm of the drive system while realizing shake.
It is further to note that can also only default tonal gradation reference voltage or common voltage shake control ginseng
Number, that is, shaking control module 1 can also be served only for receiving the shake control of preset tonal gradation reference voltage or common voltage
Parameter, to make the corresponding output level reference voltage of output module 2 or common voltage periodic jitter voltage.
The drive system shakes control module 1 and output module 2 by setting, can export the tonal gradation of periodic jitter
Reference voltage and common voltage, to eliminate the image retention during liquid crystal display is shown, the drive system is by making shake control mould
Block 1 receives preset shake control parameter, and the shake of tonal gradation reference voltage and common voltage control can be made more accurate, from
And keep the eradicating efficacy of image retention more preferable.
Embodiment 2：
The present embodiment provides a kind of image retention removing methods, unlike embodiment 1, as shown in fig. 7, comprises：
Step S1 '：The shake control parameter of preset gray scale voltage.
The step includes：Set the packet parameters of gray scale voltage；The shake period of preset gray scale voltage, trembles at jitter range
The grayscale that dynamic amplitude and needs are shaken.
Wherein, the shake period refers to gray scale voltage since central value, is turned again to after shake is raised and lowered in overvoltage
Time used when its central value.Jitter range refers between the maxima and minima that gray scale voltage was shaken at one in the period
Difference.Jitter amplitude refers to the variable quantity of the voltage of the adjacent double pump of gray scale voltage.Needing the grayscale shaken to refer to gray scale voltage needs
The voltage value to be shaken.
In the present embodiment, the jitter range of the ranging from 8-3000 frames in the shake period of gray scale voltage, gray scale voltage is 0-
400mV, the jitter amplitude ranging from 0-100mV of gray scale voltage, the grey-scale range that the needs of gray scale voltage are shaken is 191-255,
Total grayscale of gray scale voltage is 256.
Step S2 '：Gray scale voltage carries out periodic voltage liter according to preset shake control parameter around its central value
High and reduction shake, to eliminate the image retention during liquid crystal display is shown.
Wherein, the specific dither process of gray scale voltage is：As shown in Figure 8 and Figure 9,
Step S21：Since the central value of gray scale voltage Gray, counter starts accumulation and calculates frame number.
Wherein, after a jitter amplitude h2 is often raised and lowered with gray scale voltage Gray in the central value of gray scale voltage Gray
The gray scale voltage after a jitter amplitude h2 is often raised and lowered in the duration all same of gray scale voltage value, gray scale voltage Gray
The duration of value is the jitter amplitude period t2 of gray scale voltage Gray, the jitter amplitude period t2=of gray scale voltage Gray
The shake period of (the jitter range H2 of the jitter amplitude h2/ gray scale voltages Gray of gray scale voltage Gray) × gray scale voltage Gray
T2.The jitter amplitude period t2 of gray scale voltage Gray is the integral multiple of two frames and is at least two frames.This is because parity frame grayscale
Polarity of voltage is on the contrary, so must keep the jitter amplitude period t2 of gray scale voltage Gray to be the integral multiple of two frames and be at least two
Frame just can make parity frame gray scale voltage symmetrical.
Step S22：When reaching preset frame number, gray scale voltage Gray become larger according to the packet parameters of setting (it is assumed that
Gray scale voltage Gray progress, which first increases afterwards, reduces shake).
In the step, when reaching preset frame number, just past a jitter amplitude period t2 of gray scale voltage Gray,
At this point, packet parameters are primary according to setting update, gray scale voltage Gray increases a shake width according to updated packet parameters
Spend h2.
Step S23：The step same as step S22 is repeated, until after n jitter amplitude period t2 of experience, gray scale voltage
Gray is increased to maximum preset value (i.e. gray scale voltage Gray shakes the maximum value in cycle T 2 at one).
Step S24：When reaching preset frame number, gray scale voltage Gray becomes smaller according to the packet parameters of setting.
In the step, when reaching preset frame number, just past a jitter amplitude period t2 of gray scale voltage Gray,
At this point, packet parameters are primary according to setting update, gray scale voltage Gray reduces a shake width according to updated packet parameters
Spend h2.
Step S25：The step same as step S24 is repeated, until after m jitter amplitude period t2 of experience, gray scale voltage
Gray is reduced to minimum preset value (i.e. gray scale voltage Gray shakes the minimum value in cycle T 2 at one).
So far, a shake cycle T 2 terminates.Repeat the above steps S21-S25, is formed and periodically raises and reduces shake
Gray scale voltage Gray.
When due to gray scale voltage Gray being high gray, liquid crystal display is more prone to that image retention occurs, and there is no need to all
Gray scale voltage Gray do and shake, it is only necessary to so that the gray scale voltage Gray of high gray is carried out periodic jitter, such as：It is to grayscale
The waveform that 255 gray scale voltage Gray255 is shaken is as shown in Figure 9.It is assumed that one group of gray scale voltage is 256 (i.e. 0-255),
Only the gray scale voltage Gray191-255 that grayscale value is 191-255 is shaken, and the ash for being 255 to grayscale value in shake
Rank voltage Gray255 is shaken on a large scale, and the gray scale voltage Gray254 for being 254 to grayscale value carries out small range shake, to ash
Rank value is in 191 gray scale voltage Gray below without shake.Meanwhile the shake model of the gray scale voltage Gray to different grayscale values
Different settings can also be carried out by enclosing H2 and jitter amplitude h2, finally guarantee the gray scale voltage by periodic jitter
Gray reduces the accumulation of charge, to reduce the possibility of image retention generation.
Based on above-mentioned image retention removing method, the present embodiment also provides a kind of drive system corresponding to the image retention removing method,
As shown in Figure 10, wherein shake control module 1 is used to receive the shake control parameter of preset gray scale voltage, and according to default
Shake control parameter control output module 2 export gray scale voltage around its central value carry out periodic voltage raise and reduce
The voltage of shake.
In the present embodiment, shake control module 1 is arranged in sequence controller, and output module 2 is arranged in source drive core
In piece.In addition, the drive system further includes grouping module 3 and division module 4, grouping module 3 be arranged in sequence controller and
It is connect with shake control module 1, division module 4 is arranged in source driving chip and is connect with output module 2.Division module 4
One group of gray scale voltage for being generated to source driving chip divides, to form multigroup gray scale voltage.Grouping module 3 is used for
Multiple gray scale voltages in multigroup gray scale voltage are grouped again according to the packet parameters of setting.Control module 1 is shaken to use
The period is carried out in its central value that surrounds for controlling the output gray scale voltage of output module 2 according to the group result again of grouping module 3
Property voltage raises and reduces the voltage of shake.
The drive system shakes control module 1 and output module 2 by setting, can export the grayscale electricity of periodic jitter
Pressure, to eliminate the image retention during liquid crystal display is shown, the drive system is by making shake control module 1 receive preset shake
Control parameter can be such that the shake of gray scale voltage controls more accurate, to keep the eradicating efficacy of image retention more preferable.
Embodiment 3：
The present embodiment provides a kind of image retention removing methods, as different from Example 1, as shown in figure 11, including：Step
S1”：The shake control parameter of default tonal gradation reference voltage and common voltage.
The step specifically includes：
Step S10：The different temperatures range of the environment temperature to prestore residing for liquid crystal display and tonal gradation reference voltage
The mapping table of corresponding shake control parameter with common voltage.
In the step, the different temperatures range of the environment temperature residing for liquid crystal display corresponds to a different gray scale respectively
The shake control parameter of grade reference voltage and common voltage, the shake control of each tonal gradation reference voltage and common voltage
Parameter corresponds to control and generates one group of tonal gradation reference voltage and a common voltage.
Step S2 "：Tonal gradation reference voltage and common voltage carry out voltage raising according to preset shake control parameter
Or reduce shake.
The step specifically includes：
Step S20：The environment temperature residing for liquid crystal display is acquired, and according to the temperature range where environment temperature from reflecting
Shake control parameter corresponding with the temperature range is selected in firing table；Control parameter, which is shaken, according to this generates one group of gray scale
Grade reference voltage and a common voltage.
In the present embodiment, the gamma curve meeting due to liquid crystal display with the variation of local environment temperature in display
Respective change occurs, if gamma curve easy tos produce integral translation or deformation, it is aobvious that translation or deformation are easy to cause liquid crystal display
Occurs image retention when showing.By using the image retention removing method in the present embodiment, the i.e. environment temperature residing for liquid crystal display,
Properly select one and the shake control parameter corresponding to temperature range where the environment temperature, the shake control parameter that can control
System generates one group of tonal gradation reference voltage and a common voltage, in this group of tonal gradation reference voltage and this common voltage
Under carry out display can reduce or liquid crystal display is avoided image retention occur.
Based on above-mentioned image retention removing method, the present embodiment also provides a kind of drive system corresponding to the image retention removing method,
As shown in figure 12, shake control module 1 is used to receive shake control parameter of the preset tonal gradation with reference to pressure and common voltage,
And according to preset shake control parameter control output module 2 output gray level grade reference voltage and common voltage increase
Or reduce the voltage of shake.
In the present embodiment, shake control module 1 is arranged in sequence controller, and the setting of output module 2 is joined in tonal gradation
Voltage is examined to generate in chip (i.e. P-Gamma chips).In addition, the drive system further includes temperature collecting module 5 and memory module
6, temperature collecting module 5 and memory module 6 are connect with shake control module 1, and memory module 6 is arranged in sequence controller.
Temperature collecting module 5 is used to acquire the environment temperature residing for liquid crystal display, and the environment temperature of acquisition is sent to shake control
Molding block 1.Memory module 6 is used to store the different temperatures range of the environment temperature residing for liquid crystal display and tonal gradation refers to
The mapping table of the corresponding shake control parameter of voltage and common voltage.Control module 1 is shaken for the environment temperature according to acquisition
The temperature range at place selects shake control parameter corresponding with the temperature range from mapping table, and is shaken according to this
Control parameter controls output module 2 and exports one group of tonal gradation reference voltage and a common voltage.
The drive system shakes control module 1 and output module 2 by setting, can export one group that shake is raised and lowered
Tonal gradation reference voltage and a common voltage, to eliminate the image retention during liquid crystal display is shown, which passes through
So that shake control module 1 is received preset shake control parameter, the shake control of tonal gradation reference voltage and common voltage can be made
System is more accurate, to keep the eradicating efficacy of image retention more preferable.
The advantageous effect of embodiment 1-3：The image retention removing method that embodiment 1-3 is provided is joined by default tonal gradation
Examine voltage and/or common voltage or the shake control parameter of gray scale voltage；Make tonal gradation reference voltage and/or common electrical
Pressure or gray scale voltage are according to preset shake control parameter progress voltage dithering, to eliminate during liquid crystal display shows
Image retention, the method which eliminates relative to traditional image retention do not interfere with the normal aobvious of liquid crystal display not only
Show, and the shake of tonal gradation reference voltage and/or common voltage or gray scale voltage control can be made more accurate, to
Keep the eradicating efficacy of image retention more preferable.
Embodiment 4：
The present embodiment provides a kind of display device, include drive systems of the embodiment 1-3 in any one.
It is residual when can not only eliminate display device display by using drive systems of the embodiment 1-3 in any one
Picture, and can make the display device show when image retention eradicating efficacy it is more preferable.
The display device can be：Liquid crystal display panel, Electronic Paper, mobile phone, tablet computer, television set, display, notebook electricity
Any product or component with crystal display such as brain, Digital Frame, navigator.
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, in the essence for not departing from the present invention
In the case of refreshing 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 (13)
1. a kind of image retention removing method, which is characterized in that including：Default tonal gradation reference voltage and/or common voltage or
The shake control parameter of gray scale voltage；The tonal gradation reference voltage and/or the common voltage or the gray scale voltage
Voltage raising is carried out according to the preset shake control parameter and/or reduces shake, to eliminate during liquid crystal display shows
Image retention；
The shake control parameter of the default tonal gradation reference voltage and common voltage includes：Prestore the liquid crystal display institute
The different temperatures range of the environment temperature at place is controlled to the corresponding shake of the tonal gradation reference voltage and the common voltage
The mapping table of parameter；
The tonal gradation reference voltage and the common voltage carry out voltage raising according to the preset shake control parameter
Or it reduces shake and includes：The environment temperature residing for the liquid crystal display is acquired, and according to the temperature where the environment temperature
Range selects shake control parameter corresponding with the temperature range from the mapping table；According to the shake control parameter
Tonal gradation reference voltage described in generating one group and a common voltage.
2. image retention removing method according to claim 1, which is characterized in that the tonal gradation reference voltage and/or institute
It states common voltage or the gray scale voltage and the period is carried out around respective central value according to the preset shake control parameter
The voltage of property raises and reduces shake.
3. image retention removing method according to claim 2, which is characterized in that the default tonal gradation reference voltage is trembled
Dynamic control parameter includes：Preset the central value of the tonal gradation reference voltage；Preset trembling for the tonal gradation reference voltage
The grayscale that dynamic period, jitter range, jitter amplitude and needs are shaken；
The shake control parameter of the default common voltage includes：Preset the central value of the common voltage；It is default described public
Shake period, jitter range and the jitter amplitude of voltage；
Wherein, the shake period refers to the tonal gradation reference voltage or the common voltage since respective central value,
Time used when turning again to respective central value after overvoltage raises and reduces shake；The jitter range refers to the ash
Spend the difference between the maxima and minima of grade reference voltage or the common voltage within a shake period；Institute
State the variable quantity that jitter amplitude refers to the tonal gradation reference voltage or primary voltage is often raised and lowered in the common voltage；Institute
It states and the grayscale shaken is needed to refer to the voltage value that the tonal gradation reference voltage needs are shaken.
4. image retention removing method according to claim 2, which is characterized in that the shake control ginseng of the preset gray scale voltage
Number includes：Set the packet parameters of the gray scale voltage；It presets the shake period of the gray scale voltage, jitter range, shake width
The grayscale that degree and needs are shaken；
Wherein, the shake period refers to the gray scale voltage since central value, after shake is raised and lowered in overvoltage again
Return to the time used when its central value；The jitter range refers to maximum of the gray scale voltage within a shake period
Difference between value and minimum value；The jitter amplitude refers to the variable quantity of the voltage of the adjacent double pump of the gray scale voltage；Institute
It states and the grayscale shaken is needed to refer to the voltage value that the gray scale voltage needs are shaken.
5. image retention removing method according to claim 3, which is characterized in that the shake week of the tonal gradation reference voltage
The ranging from 8-3000 frames of phase, the ranging from 4-3000 frames in the shake period of the common voltage, the tonal gradation is with reference to electricity
The jitter range of pressure and the common voltage is more than 0 and to be less than or equal to 400mV, the tonal gradation reference voltage and described
The jitter amplitude range of common voltage is more than 0 and to be less than or equal to 100mV, and the tonal gradation reference voltage needs to shake
Grey-scale range be 191-255, total grayscale of the tonal gradation reference voltage is 256.
6. image retention removing method according to claim 4, which is characterized in that the range in the shake period of the gray scale voltage
For 8-3000 frames, the jitter range of the gray scale voltage is more than 0 and to be less than or equal to 400mV, the shake width of the gray scale voltage
Degree is ranging from more than 0 and is less than or equal to 100mV, and the grey-scale range that the needs of the gray scale voltage are shaken is 191-255, the ash
Total grayscale of rank voltage is 256.
7. a kind of drive system, for eliminating the image retention during liquid crystal display is shown, which is characterized in that including shaking control module
And output module, the shake control module is for receiving preset tonal gradation reference voltage and/or common voltage or ash
The shake control parameter of rank voltage, and the output module is controlled according to the preset shake control parameter and exports the gray scale
The voltage for increase and/or reduce shake of grade reference voltage and/or the common voltage or the gray scale voltage；
Further include temperature collecting module and memory module, the temperature collecting module and the memory module are controlled with the shake
Molding block connects, and the acquisition module is used to acquire environment temperature residing for the liquid crystal display, and by the environment temperature of acquisition
Degree is sent to the shake control module；The memory module is used to store the environment temperature residing for the liquid crystal display not
The mapping table of synthermal range and the tonal gradation reference voltage and the corresponding shake control parameter of the common voltage；It is described
Shake control module is used to be selected from the mapping table and the temperature model according to the temperature range where the environment temperature of acquisition
Corresponding shake control parameter is enclosed, and ash described in one group of the output module output is controlled according to the shake control parameter
Spend grade reference voltage and a common voltage.
8. drive system according to claim 7, which is characterized in that the shake control module and the output module are equal
Setting is generated in tonal gradation reference voltage in chip.
9. drive system according to claim 7, which is characterized in that the shake control module is arranged in sequence controller
In, the output module setting is in tonal gradation reference voltage generates chip.
10. drive system according to claim 9, which is characterized in that the memory module is arranged in the timing control
In device.
11. drive system according to claim 7, which is characterized in that the shake control module is arranged in timing control
In device, the output module is arranged in source driving chip.
12. drive system according to claim 11, which is characterized in that further include grouping module and division module, it is described
Grouping module is arranged in the sequence controller and is connect with the shake control module, and the division module is arranged described
It is connect in source driving chip and with the output module；
Gray scale voltage divides described in the division module be used to generate the source driving chip one group, more to be formed
The group gray scale voltage；The grouping module is used for the packet parameters according to setting to multiple institutes in multigroup gray scale voltage
Gray scale voltage is stated to be grouped again；The shake control module is used to be controlled according to the group result again of the grouping module
The output module exports the voltage that shake is raised and reduced around its central value progress periodic voltage of the gray scale voltage.
13. a kind of display device, which is characterized in that including the drive system described in claim 7-12 any one.
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| CN106328086B (en) * | 2016-10-31 | 2020-05-05 | 深圳市华星光电技术有限公司 | Drive circuit and drive method of liquid crystal display device |
| CN106847212A (en) * | 2017-02-23 | 2017-06-13 | 北京京东方专用显示科技有限公司 | Common electric voltage controls circuit and method, display panel and display device |
| CN110599977A (en) * | 2019-09-18 | 2019-12-20 | 福州京东方光电科技有限公司 | Shutdown ghost eliminating circuit and display device |
| CN111599317A (en) * | 2020-05-08 | 2020-08-28 | 江西兴泰科技有限公司 | Electronic paper display device, debugging method and driving method |
| CN112150979B (en) * | 2020-10-23 | 2022-04-08 | 京东方科技集团股份有限公司 | Liquid crystal display device and driving method thereof |
| CN114664271B (en) * | 2022-05-17 | 2022-09-27 | 惠科股份有限公司 | Common voltage correction circuit, display panel and display device |
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| JP2002358056A (en) * | 2001-03-28 | 2002-12-13 | Seiko Epson Corp | Image display device and common signal supplying method |
| JP4199141B2 (en) * | 2004-02-23 | 2008-12-17 | 東芝松下ディスプレイテクノロジー株式会社 | Display signal processing device and display device |
| KR20060053514A (en) * | 2004-11-17 | 2006-05-22 | 엘지.필립스 엘시디 주식회사 | Apparatus and method for driving of liauid crystal display |
| JP2007183464A (en) * | 2006-01-10 | 2007-07-19 | Nec Lcd Technologies Ltd | Flicker adjusting system for liquid crystal display device |
| KR101330353B1 (en) * | 2008-08-08 | 2013-11-20 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Driving Method thereof |
| CN101727858B (en) * | 2008-10-10 | 2012-05-30 | 北京京东方光电科技有限公司 | Method and device for eliminating residual image |
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