CN108766326A - A kind of method and device obtaining Vcom by adjusting Flicker - Google Patents
A kind of method and device obtaining Vcom by adjusting Flicker Download PDFInfo
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- CN108766326A CN108766326A CN201810376064.XA CN201810376064A CN108766326A CN 108766326 A CN108766326 A CN 108766326A CN 201810376064 A CN201810376064 A CN 201810376064A CN 108766326 A CN108766326 A CN 108766326A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The method that the invention discloses a kind of to obtain Vcom by adjusting Flicker, includes the following steps：The first Flicker values for acquiring N number of pre-position on the display panel successively adjust the value of the corresponding common-battery pole tension in the precalculated position according to the first Flicker values, obtain N number of initial common-battery pole tension；Each value of the initial common-battery pole tension as common-battery pole tension is loaded successively, acquire the 2nd Flicker values of N number of pre-position under each initial common-battery pole tension, the difference for calculating the maxima and minima under each initial common-battery pole tension in the 2nd Flicker values successively, obtains N number of difference；Select the corresponding initial common-battery pole tension of the minimum value in N number of difference as best common-battery pole tension.The phenomenon that common-battery pole tension made is all best, effectively subregion is avoided to be likely to occur image retention for entire panel, improves display effect.
Description
Technical field
The invention belongs to liquid crystal panel fields, and in particular to a kind of method and dress obtaining Vcom by adjusting Flicker
It sets.
Background technology
In liquid crystal panel field, since the polarity switching of public electrode voltages (Vcom) will produce the flicker of horizontal striped
Phenomenon, commonly referred to as Flicker phenomenons, the numerical values recited of Flicker flicker values also directly reflect the quality of liquid crystal display panel
Reliability.The numerical value of usual Flicker flicker values is smaller, and liquid crystal display panel generates image retention (Image Sticking, IS)
Risk is smaller, on the contrary then risk is bigger.Before liquid crystal display manufacture, manufacturer can disposably go out Vcom voltage
Factory adjusts, to reduce influence of the Vcom voltage to backlight flicker in liquid crystal display.The way of existing scheme is as follows：1, it will detect
The sensor for surveying voltage signal is placed on the center of panel；2, display panel shows 127 grayscale Flicker, corresponding adjustment VCOM,
So that the Flicker of the central point is minimum；3, what will be obtained makes the Vcom of the Flicker minimums of the central point as entire surface
The Vcom of plate, to write in Gamma chips.
However, data line voltage signal and scan line voltage signal are decayed step by step, the best Vcom of different location in panel
It is all different, may not be best Vcom for other regions when it is best Vcom to adjust a certain region.And with
The distribution of the increase of panel size, Flicker is more and more uneven, the Vcom that the Flicker flicker values of central point adjust
It can not reflect the Vcom of panel entirety, over time, subregion is likely to occur image retention.
Invention content
In order to solve the above-mentioned problems in the prior art, the present invention provides one kind to be obtained by adjusting Flicker
The method and device of Vcom.The technical problem to be solved in the present invention is achieved through the following technical solutions：
The method that an embodiment of the present invention provides a kind of to obtain Vcom by adjusting Flicker is applied to display panel, packet
Include following steps：
The first Flicker values for acquiring N number of pre-position on the display panel successively, according to described first
Flicker values adjust the value of the corresponding common-battery pole tension in the precalculated position, obtain N number of initial common-battery pole tension；
Each value of the initial common-battery pole tension as common-battery pole tension is loaded successively, and acquisition is each described initial total
2nd Flicker values of N number of pre-position under electrode voltage are calculated successively under each initial common-battery pole tension
The difference of maxima and minima in the 2nd Flicker values, obtains N number of difference；
Select the corresponding initial common-battery pole tension of the minimum value in N number of difference as best common-battery pole tension, wherein N
≥2。
In a specific embodiment, value of the different initial common-battery pole tensions as common-battery pole tension is loaded successively, is acquired
The 2nd Flicker values of N number of pre-position, calculate successively every under each different initial common-battery pole tension
The difference of maxima and minima under a different initial common-battery pole tension in the 2nd Flicker values, obtains N number of difference
Value, including：
The N number of initial common-battery pole tension got is ranked up, maximum common-battery pole tension Vmax and minimum are selected
Common-battery pole tension Vmin；
Values of the minimum common-battery pole tension Vmin as common-battery pole tension is loaded, acquisition is in the minimum common-battery pole tension
The Flicker values of N number of pre-position under Vmin, calculate maximum value in the Flicker values of N number of pre-position with
The difference of minimum value；
According to sorted order, select the initial common-battery pole tension corresponding to the sequence as common-battery pole tension successively
Value, acquire under the initial common-battery pole tension of the sequence N number of pre-position Flicker values, it is N number of to calculate this successively
The difference of maxima and minima in the Flicker values of pre-position, obtains N number of difference.
In a specific embodiment, the precalculated position includes display panel geometric center point position.
The present invention also provides a kind of devices obtaining Vcom by adjusting Flicker, including：
N number of detection sensor is correspondingly arranged at N number of precalculated position of the display panel respectively, described N number of for acquiring
The Flicker values in precalculated position；
Microprocessor connects N number of detection sensor, for controlling the detection sensor work, obtains described N number of
The first Flicker values in precalculated position, and the common-battery pole tension in the precalculated position is adjusted according to the first Flicker values, it obtains
To N number of initial common-battery pole tension；
The microprocessor is additionally operable to the value for selecting each initial common-battery pole tension as common-battery pole tension successively, obtains
The 2nd Flicker values for taking N number of pre-position under each initial common-battery pole tension, calculate successively in each institute
The difference for stating the maxima and minima under initial common-battery pole tension in the 2nd Flicker values obtains N number of difference, selects N number of
The corresponding initial common-battery pole tension of minimum value in the difference is as best common-battery pole tension, wherein N >=2.
In a specific embodiment, when obtaining the Flicker values in the N number of precalculated position of display panel, micro- place
Reason device only controls one of them described detection sensor work in synchronization.
In a specific embodiment, N number of precalculated position in the case where obtaining each different initial common-battery pole tension
When the 2nd Flicker values at place, the microprocessor controls each described detection sensor and works.
In a specific embodiment, the precalculated position includes display panel geometric center point position.
Compared with prior art, beneficial effects of the present invention：
The present invention by acquiring the Flicker values of display panel multiple and different positions, and the algorithm provided through the invention,
The common-battery pole tension made is all best for entire panel, effectively subregion is avoided to be likely to occur image retention
Phenomenon improves display effect.
Description of the drawings
Fig. 1 is a kind of method flow diagram obtaining Vcom by adjusting Flicker provided in an embodiment of the present invention；
Display panel areas when Fig. 2 is N=9 provided in an embodiment of the present invention divides schematic diagram；
Fig. 3 is a kind of apparatus module block diagram obtaining Vcom by adjusting Flicker provided in an embodiment of the present invention.
Specific implementation mode
Further detailed description is done to the present invention with reference to specific embodiment, but embodiments of the present invention are not limited to
This.
Embodiment one
Fig. 1 is referred to, Fig. 1 is a kind of method stream obtaining Vcom by adjusting Flicker provided in an embodiment of the present invention
Cheng Tu.
The method that an embodiment of the present invention provides a kind of to obtain Vcom by adjusting Flicker is applied to display panel, packet
Include following steps：
The first Flicker values for acquiring N number of pre-position on the display panel successively, according to described first
Flicker values adjust the value of the corresponding common-battery pole tension in the precalculated position, obtain N number of initial common-battery pole tension；
Each value of the initial common-battery pole tension as common-battery pole tension is loaded successively, and acquisition is each described initial total
2nd Flicker values of N number of pre-position under electrode voltage are calculated successively under each initial common-battery pole tension
The difference of maxima and minima in the 2nd Flicker values, obtains N number of difference；
Select the corresponding initial common-battery pole tension of the minimum value in N number of difference as best common-battery pole tension, wherein N
≥2.Depending on the actual conditions such as the numerical basis panel size of N, resolution ratio.
For liquid crystal display panel (TFT LCD), it is made of two sheet glass, respectively upper substrate and lower substrate, upper base
It is provided with color filter on plate, TFT is set on bottom crown, one layer of liquid crystal layer is clipped between upper substrate and lower substrate, periphery is again
The elements such as polarizer, backlight, light source, scan line, data line, driving circuit of arranging in pairs or groups form display.And in order to realize to liquid
The deflection of liquid crystal molecule in crystal layer needs setting common-battery pole tension Vcom to be controlled so that the positive of liquid crystal molecule deflects and bear
Deflection is symmetrical, to improve display effect.
However, since the voltage being loaded into scan line and data line has transmission loss in transmission process, cause to add
The voltage being downloaded on sub-pixel becomes smaller, and also just destroys the symmetry of common-battery pole tension Vcom.And with the size of display panel
Increase, scan line and data line loss of different location in display panel are also more and more uncontrollable, therefore face in order to balance
The display effect of each position of plate, how to choose a best common-battery pole tension Vcom becomes a problem for needing to solve.
In order to better illustrate the course of work of the present embodiment, Fig. 2 is referred to, Fig. 2 is N=provided in an embodiment of the present invention
Display panel areas when 9 divides schematic diagram.
It is illustrated with N=9, which is respectively distributed to the different location of display panel, in order to obtain data, needs
Corresponding sensor is set, i.e., at the upper left S1 of panel, the S2 of top, the S3 in upper right side, the S4 on the left side, geometric center
S5, the S6 on the right, the S7 of lower left, the S8 of lower section, lower right S9.Preferably, which is divided into display panel
" nine grids " shape, 9 positions are in " nine grids " successively at each center of a lattice position so that the position of setting is uniformly divided
Cloth is on a display panel.
Preferably, which includes display panel geometric center point position.In general, at least needing acquisition face
The Flicker values of slab geomitry center position.
The Flicker values at 9 different locations, i.e. the first Flicker values, according to each first are acquired successively
Flicker values adjust the value of the corresponding common-battery pole tension in the position, obtain 9 initial common-battery pole tensions；
It should be noted that the position due to collection point is different, signal decaying is also different, each time to wherein
One position is acquired, and obtains the corresponding initial common-battery pole tension (the best Vcom namely at the position) in the position, is led to
It is respectively Vcom1-Vcom9 to cross 9 processes acquired of execution and obtain 9 initial common-battery pole tensions.
Certainly, the acquisition order of above-mentioned Vcom1-Vcom9 is not specially required, as long as this 9 can be collected successively
Data.
Panel common-battery pole tension is adjusted to Vcom1, under this condition, while acquiring the Flicker values at 9 positions,
That is the 2nd Flicker values make the difference the maxima and minima in obtained this 9 Flicker values, obtain difference V1；
According to this method, panel common-battery pole tension is adjusted to Vcom2 successively, under this condition, while acquiring 9 positions
The Flicker values at place, i.e. the 2nd Flicker values are set, the maxima and minima in obtained this 9 Flicker values is carried out
It makes the difference, obtains difference V2；
It is sequentially adjusted in as Vcom3-Vcom9, finally obtains 9 difference V1-V9；
Such as when V4 minimums in difference, best common-battery pole tensions of the corresponding Vcom4 of V4 as entire panel is found out
Vcom。
In a specific embodiment, value of the different initial common-battery pole tensions as common-battery pole tension is loaded successively, is acquired
The 2nd Flicker values of N number of pre-position, calculate successively every under each different initial common-battery pole tension
The difference of maxima and minima under a different initial common-battery pole tension in the 2nd Flicker values, obtains N number of difference
Value, including：
The N number of initial common-battery pole tension got is ranked up, maximum common-battery pole tension Vmax and minimum are selected
Common-battery pole tension Vmin；
Values of the minimum common-battery pole tension Vmin as common-battery pole tension is loaded, acquisition is in the minimum common-battery pole tension
The Flicker values of N number of pre-position under Vmin, calculate maximum value in the Flicker values of N number of pre-position with
The difference of minimum value；
According to sorted order, select the initial common-battery pole tension corresponding to the sequence as common-battery pole tension successively
Value, acquire under the initial common-battery pole tension of the sequence N number of pre-position Flicker values, it is N number of to calculate this successively
The difference of maxima and minima in the Flicker values of pre-position, obtains N number of difference.
In order to facilitate the adjusting of Vcom is carried out, size sequence is carried out to the Vcom1-Vcom9 got, such as from small to large
It is Vcom9, Vcom8, Vcom6, Vcom7, Vcom4, Vcom5, Vcom3, Vcom1, Vcom2 successively.Then first load the electricity of Vcom9
Value of the pressure value as panel common-battery pole tension obtains difference V9 according to above-mentioned flow, successively obtain Vcom8, Vcom6, Vcom7,
The corresponding difference of Vcom4, Vcom5, Vcom3, Vcom1, Vcom2 obtains finally obtaining 9 difference V1-V9.
The present invention by acquiring the Flicker values of display panel multiple and different positions, and the algorithm provided through the invention,
The common-battery pole tension made is all best for entire panel, effectively subregion is avoided to be likely to occur image retention
Phenomenon improves display effect.
Embodiment two
The present invention also provides a kind of devices obtaining Vcom by adjusting Flicker, including：
N number of detection sensor is correspondingly arranged at N number of precalculated position of the display panel respectively, described N number of for acquiring
The Flicker values in precalculated position；
Microprocessor connects N number of detection sensor, for controlling the detection sensor work, obtains described N number of
The first Flicker values in precalculated position, and the common-battery pole tension in the precalculated position is adjusted according to the first Flicker values, it obtains
To N number of initial common-battery pole tension；
The microprocessor is additionally operable to the value for selecting each initial common-battery pole tension as common-battery pole tension successively, obtains
The 2nd Flicker values for taking N number of pre-position under each initial common-battery pole tension, calculate successively in each institute
The difference for stating the maxima and minima under initial common-battery pole tension in the 2nd Flicker values obtains N number of difference, selects N number of
The corresponding initial common-battery pole tension of minimum value in the difference is as best common-battery pole tension, wherein N >=2.
In a specific embodiment, when obtaining the Flicker values in the N number of precalculated position of display panel, micro- place
Reason device only controls one of them described detection sensor work in synchronization.
In a specific embodiment, N number of precalculated position in the case where obtaining each different initial common-battery pole tension
When the 2nd Flicker values at place, the microprocessor controls each described detection sensor and works.
Equally by taking N=9 as an example, the position of detection sensor is also configured according to embodiment one, and wherein microprocessor is
FPGA (Field-Programmable Gate Array, field programmable gate array) chip.The present embodiment is to acquisition order
It does not specially require, chooses any one and be sequentially exemplified below：
Step 1: FPGA control detection sensors S1 is opened, according to the Flicker values of detection sensor S1 acquisitions, adjustment
Vcom at the positions S1 obtains the best Vcom1 at the positions S1；
Step 2: FPGA control detection sensors S1 is closed, and control detection sensor S2 and open, according to detection sensor
The Flicker values of S2 acquisitions, adjust the Vcom at the positions S2, obtain the best Vcom2 at the positions S2；
Step 3: FPGA control detection sensors S2 is closed, and control detection sensor S3 and open, according to detection sensor
The Flicker values of S3 acquisitions, adjust the Vcom at the positions S3, obtain the best Vcom3 at the positions S3；
Step 4: FPGA control detection sensors S3 is closed, and control detection sensor S3 and open, according to detection sensor
The Flicker values of S3 acquisitions, adjust the Vcom at the positions S3, obtain the best Vcom3 at the positions S3；
Step 4: FPGA control detection sensors S3 is closed, and control detection sensor S4 and open, according to detection sensor
The Flicker values of S4 acquisitions, adjust the Vcom at the positions S4, obtain the best Vcom4 at the positions S4；
Step 5: FPGA control detection sensors S4 is closed, and control detection sensor S5 and open, according to detection sensor
The Flicker values of S5 acquisitions, adjust the Vcom at the positions S5, obtain the best Vcom5 at the positions S5；
Step 6: FPGA control detection sensors S5 is closed, and control detection sensor S6 and open, according to detection sensor
The Flicker values of S6 acquisitions, adjust the Vcom at the positions S6, obtain the best Vcom6 at the positions S6；
Step 7: FPGA control detection sensors S6 is closed, and control detection sensor S7 and open, according to detection sensor
The Flicker values of S7 acquisitions, adjust the Vcom at the positions S7, obtain the best Vcom7 at the positions S7；
Step 8: FPGA control detection sensors S7 is closed, and control detection sensor S8 and open, according to detection sensor
The Flicker values of S8 acquisitions, adjust the Vcom at the positions S8, obtain the best Vcom8 at the positions S8；
Step 9: FPGA control detection sensors S8 is closed, and control detection sensor S9 and open, according to detection sensor
The Flicker values of S9 acquisitions, adjust the Vcom at the positions S9, obtain the best Vcom9 at the positions S9；
Step 10: FPGA is ranked up the size of Vcom1-Vcom9, maximizing Vmax and Vmin；
It is opened Step 11: FPGA controls all detection sensors, and it is Vmin to adjust common-battery pole tension, is acquired simultaneously
9 Flicker values calculate the difference of maxima and minima in this 9 Flicker values；
It is opened Step 11: FPGA controls all detection sensors, and it is after sorting to be sequentially adjusted in common-battery pole tension
Voltage value, and so on obtain 9 differences be V1-V9；
Step 12: finding out best common-battery pole tension Vcoms of the corresponding Vcom of minimum value in V1-V9 as entire panel.
In a specific embodiment, when obtaining the Flicker values in the N number of precalculated position of display panel, micro- place
Reason device only controls one of them described detection sensor work in synchronization.
In a specific embodiment, N number of pre-determined bit under each different initial common-battery pole tension is being obtained
When setting the 2nd Flicker values at place, the microprocessor controls each described detection sensor and works.
The present invention by acquiring the Flicker values of display panel multiple and different positions, and the algorithm provided through the invention,
The common-battery pole tension made is all best for entire panel, effectively subregion is avoided to be likely to occur image retention
Phenomenon improves display effect.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (7)
1. a kind of method obtaining Vcom by adjusting Flicker, is applied to display panel, which is characterized in that including following step
Suddenly：
The first Flicker values for acquiring N number of pre-position on the display panel successively, according to the first Flicker values
The value for adjusting the corresponding common-battery pole tension in the precalculated position obtains N number of initial common-battery pole tension；
Each value of the initial common-battery pole tension as common-battery pole tension is loaded successively, is acquired in each initial common electrode
2nd Flicker values of N number of pre-position under voltage calculate described under each initial common-battery pole tension successively
The difference of maxima and minima in 2nd Flicker values obtains N number of difference；
Select the corresponding initial common-battery pole tension of the minimum value in N number of difference as best common-battery pole tension, wherein N >=2.
2. the method according to claim 1 for obtaining Vcom by adjusting Flicker, which is characterized in that load successively not
Value of the same initial common-battery pole tension as common-battery pole tension, acquisition are described under each different initial common-battery pole tension
2nd Flicker values of N number of pre-position are calculated successively described second under each different initial common-battery pole tension
The difference of maxima and minima in Flicker values obtains N number of difference, including：
The N number of initial common-battery pole tension got is ranked up, maximum common-battery pole tension Vmax and minimum common-battery are selected
Pole tension Vmin；
Values of the minimum common-battery pole tension Vmin as common-battery pole tension is loaded, acquisition is in the minimum common-battery pole tension Vmin
Under N number of pre-position Flicker values, calculate maximum value in the Flicker values of N number of pre-position with it is minimum
The difference of value；
According to sorted order, select the initial common-battery pole tension corresponding to the sequence as common-battery pole tension successively
Value acquires the Flicker values of N number of pre-position under the initial common-battery pole tension of the sequence, it is N number of pre- to calculate this successively
The difference of the maxima and minima in the Flicker values at place is set in positioning, obtains N-1 difference.
3. the method according to claim 1 for obtaining Vcom by adjusting Flicker, which is characterized in that the pre-determined bit
It sets including display panel geometric center point position.
4. a kind of Flicker regulating devices, which is characterized in that including：
N number of detection sensor is correspondingly arranged at N number of precalculated position of the display panel respectively, described N number of predetermined for acquiring
The Flicker values of position；
Microprocessor connects N number of detection sensor, for controlling the detection sensor work, obtains described N number of predetermined
First Flicker values of position, and the common-battery pole tension in the precalculated position is adjusted according to the first Flicker values, it obtains N number of
Initial common-battery pole tension；
The microprocessor is additionally operable to the value for selecting each initial common-battery pole tension as common-battery pole tension successively, obtains
2nd Flicker values of N number of pre-position under each initial common-battery pole tension are calculated successively each described first
The difference of maxima and minima under beginning common-battery pole tension in the 2nd Flicker values obtains N number of difference, selects N number of described
The corresponding initial common-battery pole tension of minimum value in difference is as best common-battery pole tension, wherein N >=2.
5. Flicker regulating devices according to claim 4, which is characterized in that N number of predetermined obtaining the display panel
When the Flicker values of position, the microprocessor only controls one of them described detection sensor work in synchronization.
6. Flicker regulating devices according to claim 4, which is characterized in that each described different initial obtaining
Under common-battery pole tension when the 2nd Flicker values of N number of pre-position, the microprocessor controls each described detection
Sensor works.
7. Flicker regulating devices according to claim 4, which is characterized in that the precalculated position includes the display
Panel geometric center point position.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110890074A (en) * | 2019-10-30 | 2020-03-17 | 华显光电技术（惠州）有限公司 | Display screen public voltage adjusting method and display screen |
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| CN110890074A (en) * | 2019-10-30 | 2020-03-17 | 华显光电技术（惠州）有限公司 | Display screen public voltage adjusting method and display screen |
| CN110890074B (en) * | 2019-10-30 | 2022-10-28 | 华显光电技术（惠州）有限公司 | Display screen public voltage adjusting method and display screen |
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