CN109036327A - Gamma value adjusting method and device of display panel and computer readable storage medium - Google Patents
Gamma value adjusting method and device of display panel and computer readable storage medium Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 abstract description 15
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The invention discloses a gamma value adjusting method, a gamma value adjusting device and a computer readable storage medium of a display panel, wherein the method comprises the following steps: step S1, obtaining the common electrode voltage of the display panel to be tested; step S2, under the intermediate gray scale binding point of the display panel, adjusting the voltage of the common electrode to adjust the flicker value to a preset minimum flicker value; step S3, obtaining initial gamma values and target brightness values of at least three gray scale binding points, and adjusting the initial gamma values of the at least three gray scale binding points to reduce the flicker value to a preset minimum flicker value, and then adjusting the gamma values of the at least three gray scale binding points again to adjust the brightness values of the at least three gray scale binding points to the respective corresponding target brightness values; and step S4, executing the steps S2 to S3 in a loop until the gamma value of the intermediate gray level binding point matches a preset target gamma value interval. The invention solves the problem that the symmetry of the output voltage is changed to cause the polarization of the liquid crystal.
Description
Technical field
The present invention relates to electronic circuit technology field, in particular to gamma value adjusting method, the device of a kind of display panel
And computer readable storage medium.
Background technique
TFT-LCD is due in process of production, due to the difference of processing procedure and material, will cause every TFT-LCD panel
Gamma curve is deviated.If adjusting gamma curve using artificial piece piece in the production line, it will cause entire manpowers
With being significantly increased for time cost, therefore the adjustment of gamma curve greatly mostly uses automation gamma adjustment system to realize.
During adjusting system automation by gamma and adjusting gamma, in order to guarantee that gamma ties up a little non-
The accuracy that symmetry is adjusted, first can will be public in the case where the most high-order of panel ties up flash pattern (i.e. the flashing of LCD is minimum) a little
Common-battery pole tension Vcom is adjusted to best, is then carried out the asymmetry that gamma is tied up a little again and is adjusted.But its for panel
His grayscale is tied up for a little, and after having adjusted in this manner, grayscale ties up public electrode voltages Vcom and its best public affairs a little
The difference of common-battery pole tension Vcom can become larger, and the symmetry of output voltage is caused to be changed.
Summary of the invention
The main object of the present invention is the gamma value adjusting method for proposing a kind of display panel, device and computer-readable deposits
Storage media, it is intended to solve that grayscale ties up public electrode voltages Vcom a little and the difference of its best public electrode voltages Vcom is excessive,
And the problem of being changed the symmetry of output voltage, leading to liquid crystal polarization.
To achieve the above object, the present invention proposes a kind of gamma value adjusting method of display panel, the display panel
Gamma value adjusting method the following steps are included:
Step S1, the public electrode voltages of display panel to be measured are obtained；
Step S2, in the case where the intermediate grayscale of display panel is tied up a little, the public electrode voltages of the display panel are carried out
It adjusts, the flicker value of the display panel is adjusted to preset minimum flicker value；
Step S3, at least three grayscale for obtaining display panel to be measured tie up initial gamma value and target brightness value a little, and
Initial gamma value a little is tied up at least three grayscale to be adjusted, and the flicker value of display panel to be measured is decreased to preset
Minimum flicker value after, gamma value a little is tied up at least three grayscale again and is adjusted, by it is described at least three ash
Rank ties up brightness value a little and is adjusted to corresponding target brightness value；
Step S4, circulation executes the step S2 to the step S3, until the intermediate grayscale ties up gamma value a little
With preset target gamma value section.
Optionally, the step S2 is specifically included:
Step S21, the most high-order for obtaining the display panel to be measured ties up brightness value a little and lowest-order ties up brightness value a little,
And brightness value a little is tied up according to the most high-order, lowest-order ties up brightness value a little and at least three grayscale ties up a little preset
Target gamma value calculates at least three grayscale and ties up a little corresponding target brightness value.
Optionally, it in the step S21, calculates at least three grayscale and ties up a little corresponding target brightness value Lv
(n) it specifically includes:
According to the first preset formulaInstitute is calculated described in calculating
It states at least three grayscale and ties up a little corresponding target brightness value Lv (n), wherein Lv0 is the brightness value of 0 rank grayscale；Lv (M) is
The most brightness value of high-order grayscale；N is that at least three grayscale ties up a little corresponding grayscale, and n is the integer greater than 0 and less than M.
Optionally, in the step S3, initial gamma value a little is tied up at least three grayscale and is adjusted, it will be to
The flicker value for surveying display panel is decreased to preset minimum flicker value, further includes:
Step S31, initial gamma value a little is tied up according at least three grayscale after adjusting, at least three ash
Rank is tied up positive polarity voltage value in a little corresponding output voltage values and reverse voltage value and is adjusted in the same direction with amplitude, until institute
The flicker value for stating display panel is decreased to default flicker value.
Optionally, described gamma value a little is tied up at least three grayscale to be adjusted in the step S3, by institute
It states the brightness value that at least three grayscale are tied up a little and is adjusted to corresponding target brightness value, further includes:
Step S32, gamma value a little is tied up according at least three grayscale after adjusting, at least three grayscale is tied up
Positive polarity voltage value and reverse voltage value in the corresponding output voltage values of point reversely adjust with amplitude, until institute
It states at least three grayscale and ties up a little corresponding brightness value and reach corresponding target brightness value.
Optionally, at least three grayscale is tied up one of them in a little and is tied up a little for the centre.
Optionally, preset target gamma value section is (2.0,2.4).
Optionally, the specific steps of the step 1 include:
Initial public electrode voltages Vcom is read out from the appropriate address in the programmable chip of the display panel.
Optionally, in the step 3, at least three grayscale for obtaining display panel to be measured tie up initial gamma value a little
Specific steps include:
Initial gamma value is read out from the appropriate address in the programmable chip of the display panel.
Optionally, after the step 4 further include:
The relation property between a little corresponding gamma value is tied up according to each grayscale, fitting obtains linear interpolation function, then leads to
Linear interpolation is crossed, gamma value and target brightness value a little are tied up according at least three grayscale, utilizes etc. and to obtain institute than relationship
It states display panel other grayscale and ties up gamma value a little.
Optionally, display panel highest grayscale and the corresponding luminance signal of minimum gray scale are acquired by optical sensor, and will
Luminance signal is converted to corresponding voltage signal, and the voltage value by obtaining highest grayscale and minimum gray scale corresponding brightness obtains institute
State the highest grayscale of display panel and the brightness value of minimum gray scale corresponding brightness.
The present invention also proposes that a kind of gamma value adjusting device of display panel, the gamma value adjusting device include:
Optical sensor ties up brightness value a little for obtaining grayscale on display panel to be measured；
Processor, for running gamma value debugging routine；
Memory, for storing the gamma value debugging routine that can be run on the processor；Wherein,
The optical sensor is electrically connected with the processor, and the gamma value adjusts real when program is executed by the processor
Now the step of gamma value adjusting method of display panel as described above.
The present invention also proposes a kind of computer readable storage medium, is stored with gamma on the computer readable storage medium
Value adjusts program, and the gamma value, which is adjusted, realizes that the gamma value of display panel as described above is adjusted when program is executed by processor
The step of method.
The invention shows the gamma value adjusting methods of panel after the public electrode voltages for obtaining display panel to be measured, aobvious
Under showing that the intermediate grayscale of panel is tied up a little, the public electrode voltages of display panel are adjusted, by the display panel
Flicker value is adjusted to preset minimum flicker value；Then at least three grayscale for obtaining display panel to be measured tie up initial gamma a little
Value and target brightness value, and initial gamma value a little is tied up at least three grayscale and is adjusted, by display panel to be measured
Flicker value be decreased to preset minimum flicker value after, gamma value a little is tied up at least three grayscale again and is adjusted,
Corresponding target brightness value is adjusted to so that at least three grayscale is tied up brightness value a little；Until the intermediate grayscale is tied up
The gamma value of point matches preset target gamma value section.The most high-order that the present invention solves display panel ties up flash pattern a little
Under (i.e. the flashing of LCD is minimum) by public electrode voltages Vcom adjust to it is best when, each grayscale ties up public electrode voltages a little
The difference of Vcom and its best public electrode voltages Vcom are excessive, and are changed the symmetry of output voltage, lead to liquid crystal pole
The problem of change, occurs.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is that the invention shows the flow diagrams of one embodiment of gamma value adjusting method of the display panel of panel；
Fig. 2 is the idiographic flow schematic diagram of step 3 in Fig. 1；
Fig. 3 is the corresponding input data of gamma value and output voltage curve figure；
The terminal structure of the gamma-debugged device hardware running environment for the display panel that Fig. 4 the embodiment of the present invention is related to
Schematic diagram.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of gamma value adjusting method of display panel.
In the present embodiment, display panel can be applied to the liquid crystal of the tools such as computer display screen, mobile phone, monitor, TV
Showing device.
TFT-LCD is due in process of production, due to the difference of processing procedure and material, will cause every TFT-LCD panel
Gamma curve is deviated.If adjusting gamma curve using artificial piece piece in the production line, it will cause entire manpowers
With being significantly increased for time cost, therefore to mostly use automation gamma gamma adjustment system greatly real for the adjustment of gamma curve
It is existing.
During adjusting system automation adjusting gamma by gamma gamma, in order to guarantee gamma gamma
The accuracy that asymmetry a little is adjusted is tied up, flash pattern (the i.e. flashing of LCD a little can be tied up in the most high-order of display panel first
It is minimum) under public electrode voltages Vcom is adjusted to best, then carry out the asymmetry that gamma is tied up a little again and adjust.But it is right
It is tied up for a little in other grayscale of panel, after having adjusted in this manner, ties up the difference of Vcom and its best Vcom a little
It is different to become larger, cause the symmetry of output voltage to be changed, it is possible to there is the risk of liquid crystal polarization.And carrying out gal
After the adjustment of horse value, then when the intermediate grayscale of display panel carries out flashing adjustment, it is also necessary to be carried out primary intermediate grayscale again
Best public electrode voltages Vcom adjustment, cause the testing time of display panel to increase.
To solve the above-mentioned problems, referring to Fig.1, in an embodiment of the present invention, the gamma value of the display panel is adjusted
Method the following steps are included:
Step S1, the public electrode voltages of display panel to be measured are obtained；
In the present embodiment, it is to be understood that the public electrode voltages in display panel are the references of LCD alternating-current driving
Voltage, the generation circuit of general public electrode voltages are to export an AV by the power management integrated circuit in display panelDDMake
For one of input source it is adjustable be resistor network along with the voltage follow-up amplifier of a raising voltage driving capability is constituted, it is public
The generation circuit of common-battery pole tension exports after generating public electrode voltages to display panel.Therefore, gamma value adjusting is being carried out
When, initial public electrode voltages Vcom can be read out by the appropriate address in the programmable chip of display panel.
Step S2, in the case where the intermediate grayscale of display panel is tied up a little, the public electrode voltages of display panel are adjusted,
The flicker value of the display panel is adjusted to preset minimum flicker value；
In the present embodiment, in order to guarantee that gamma ties up the accuracy that asymmetry a little is adjusted, in the intermediate ash of display panel
Under rank is tied up a little, the public electrode voltages Vcom that will acquire is adjusted to best, is then carried out gamma again and is tied up asymmetry tune a little
Section.It is tied up due to intermediate grayscale and is a little in the intermediate grayscale position of display panel, tied up for a little relative to other grayscale, each grayscale is tied up
The public electrode voltages Vcom and the difference of its best public electrode voltages Vcom of point can reduce, to avoid output voltage
The problem of symmetry is changed, and leads to liquid crystal polarization generation.And after carrying out gamma value adjustment, without in display panel
Between grayscale tie up when a little carrying out flashing adjustment, then carry out best public electrode voltages Vcom adjustment, the survey of display panel can be shortened
Try the time.
Specifically, when the public electrode voltages to display panel are adjusted, display panel can got
It, can be on the basis of public electrode voltages, first by the voltage value of public electrode voltages by small after initial public electrode voltages
To being adjusted greatly, if the flicker value of display panel becomes smaller, adjustment direction is correct, and continues to increase the electricity of public electrode voltages
Pressure value, until the flicker value of the display panel is adjusted to preset minimum flicker value；Conversely, then adjustment direction mistake, it will
The voltage value of public electrode voltages is changed to the direction being adjusted from large to small adjustment, until by the flicker value of the display panel
It is adjusted to preset minimum flicker value, and determines that public electrode voltages at this time are best public electrode voltages.Certainly at other
In embodiment, first the voltage value of public electrode voltages can also be adjusted from large to small, further according to the flashing of display panel
The transformation of value is adjusted, herein with no restrictions.
Step S3, at least three grayscale for obtaining display panel to be measured tie up initial gamma value and target brightness value a little, and
Initial gamma value a little is tied up at least three grayscale to be adjusted, and the flicker value of display panel to be measured is decreased to preset
Minimum flicker value after, gamma value a little is tied up at least three grayscale again and is adjusted, by it is described at least three ash
Rank ties up brightness value a little and is adjusted to corresponding target brightness value；
In the present embodiment, initial gamma value can be read from the appropriate address in the programmable chip of the display panel.
Each grayscale ties up between brightness value a little the gamma value of tying up with corresponding grayscale a little, and there are following relationships:
After taking logarithm to formula (1) both members, it can be obtained:
Namely grayscale ties up between gamma value and brightness value a little that there are above-mentioned numbers
Learn corresponding relationship.Brightness value a little is tied up by obtaining 0 rank brightness value, most high-order brightness value and the grayscale, that is, adjusts each grayscale
Gamma value a little is tied up, can react whether gamma value meets design needs by the brightness value of display panel.And in each grayscale
It ties up a little corresponding brightness value and reaches corresponding target brightness value to determine gamma regulated value, to realize to display panel
Gamma value is adjusted.
It follows that step S4, circulation execute the step S2 to the step S3, until the intermediate grayscale is tied up a little
Gamma value matches preset target gamma value section.
In the present embodiment, it should be noted that each grayscale ties up the gamma value on a little at 2.0~2.4, is to meet human eye pair
The requirement of brightness change and gray scale variation linear relationship, the present embodiment is excellent when the gamma value to display panel is adjusted
2.0~2.4 are selected to be used as target gamma value section.It therefore, can be by judging that each grayscale is tied up a little after to gamma value has been adjusted
Whether gamma value is in section (2.0~2.4), to determine whether to complete to adjust.Gamma value after adjusting is in section (2.0
~2.4), it is determined that complete the adjusting to gamma value, gamma value after adjusting is not in section (2.0~2.4), is greater than
2.0 or less than 2.4, then return step 2, after redefining best public electrode voltages, then are adjusted gamma value.
The invention shows the gamma value adjusting methods of panel after the public electrode voltages for obtaining display panel to be measured, aobvious
Under showing that the intermediate grayscale of panel is tied up a little, the public electrode voltages of display panel are adjusted, by the display panel
Flicker value is adjusted to preset minimum flicker value；Then at least three grayscale for obtaining display panel to be measured tie up initial gamma a little
Value and target brightness value, and initial gamma value a little is tied up at least three grayscale and is adjusted, by display panel to be measured
Flicker value be decreased to preset minimum flicker value after, gamma value a little is tied up at least three grayscale again and is adjusted,
Corresponding target brightness value is adjusted to so that at least three grayscale is tied up brightness value a little；Until the intermediate grayscale is tied up
The gamma value of point matches preset target gamma value section.The most high-order that the present invention solves display panel ties up flash pattern a little
Under (i.e. the flashing of LCD is minimum) by public electrode voltages Vcom adjust to it is best when, each grayscale ties up public electrode voltages a little
The difference of Vcom and its best public electrode voltages Vcom are excessive, and are changed the symmetry of output voltage, lead to liquid crystal pole
The problem of change, occurs.
It is understood that the present embodiment can be with root after at least three grayscale are tied up with gamma value a little and is adjusted
The relation property between a little corresponding gamma value is tied up according to each grayscale, fitting obtains linear interpolation function, then passes through linear interpolation
Method ties up gamma value and brightness value a little according to the above-mentioned grayscale selected, utilizes etc. and to acquire other grayscale than relationship and tie up gal a little
Horse value.And gamma value a little can be tied up according to each grayscale, make gamma curve.So set, can be repeated to avoid a large amount of
Operation improves the working efficiency that gamma is adjusted, while can guarantee the accuracy that gamma is adjusted, and meets volume production demand.
Further, in above-described embodiment, the step S2 is specifically included:
Step S21, the most high-order for obtaining the display panel to be measured ties up brightness value a little and lowest-order ties up brightness value a little,
And brightness value a little is tied up according to the most high-order, lowest-order ties up brightness value a little and at least three grayscale ties up a little preset
Target gamma value calculates at least three grayscale and ties up a little corresponding target brightness value.
In specific implementation, after lighting the display panel to be measured, the face plate center point of acquisition present image can be passed through
Brightness value, and each grayscale using display panel central point from 0 grayscale to highest grayscale tie up a little corresponding brightness value as
Each grayscale of display panel ties up a little corresponding brightness value.Certainly in other embodiments, also available central point and in
The brightness value of each pixel in other regions except heart point, and the average brightness value of pixel is calculated, average brightness value is made
A brightness value is tied up for each grayscale.
Specifically, equipment can be acquired by brightness such as optical sensors to acquire display panel highest grayscale and minimum gray scale pair
The luminance signal answered, and luminance signal is converted into corresponding voltage signal, it is corresponding by obtaining highest grayscale and minimum gray scale
The voltage value of brightness can obtain the brightness value of display panel highest grayscale and minimum gray scale.
Further, in above-described embodiment, in the step S21, brightness value a little, lowest-order are tied up getting most high-order
It, can be according to the first preset formula after tying up the preset target gamma value that brightness value and at least three grayscale a little is tied up a littleCalculated described in calculating at least three grayscale tie up a little respectively it is right
The target brightness value Lv (n) answered.Wherein, Lv0 is the brightness value of 0 rank grayscale；Lv (M) is the brightness value of most high-order grayscale；N is institute
It states at least three grayscale and ties up a little corresponding grayscale, and n is the integer greater than 0 and less than M.
Referring to Fig. 2, further, in above-described embodiment, in the step S3, at least three grayscale tie up a little at the beginning of
Beginning gamma value is adjusted, and the flicker value of display panel to be measured is decreased to preset minimum flicker value, further includes:
Step S31, initial gamma value a little is tied up according at least three grayscale after adjusting, at least three ash
Rank is tied up positive polarity voltage value in a little corresponding output voltage values and reverse voltage value and is adjusted in the same direction with amplitude, until institute
The flicker value for stating display panel is decreased to default flicker value.
In the present embodiment, it should be noted that the liquid crystal molecule in display panel is to change its positional relationship by voltage
, liquid crystal molecule needs to apply the voltage signal that a positive-negative polarity changes to liquid crystal molecule and realizes that the exchange of liquid crystal molecule is driven
It is dynamic.It include a pixel capacitance and a thin film transistor (TFT), according to the driving of liquid crystal original in each sub-pix of display panel
For reason it is found that applying alive to liquid crystal molecule is voltage on sub-pix capacitor, what one end of pixel capacitance was connected to is display
The data line of panel accesses the data-signal of source drive integrated circult output, the other end connection of pixel capacitance by data line
Be public electrode, the voltage of public electrode input is public electrode voltages.In the present embodiment, grayscale is tied up a little among determining
Best public electrode voltages be display panel public electrode voltages after, the current potential for being equivalent to public electrode remains unchanged.?
When pixel capacitance connection and the fixed voltage value of that one end of public electrode, realize that the exchange driving of liquid crystal molecule is equivalent to electricity
It is low when high when holding the current potential of one end of connection data line relative to public electrode current potential, polarity reversion may be implemented.Display panel
It flashes, that is, light/dark variation occur is because the pressure difference and reverse voltage of positive polarity voltage and public electrode voltages are to public affairs
The pressure difference of common-battery pole tension differs so that brightness when positive polarity be greater than negative polarity when brightness or negative polarity when brightness
Brightness when greater than positive polarity.Therefore the present embodiment is by adjusting gamma value, to adjust the data-signal of the corresponding output of data line
Voltage value, to adjust the direction of positive polarity voltage value and reverse voltage value that grayscale is tied up in a little corresponding output voltage values
And amplitude, until the pressure difference phase of the pressure difference and reverse voltage of positive polarity voltage and public electrode voltages to public electrode voltages
Deng, realize that the flicker value of display panel is decreased to default flicker value, referring to Fig. 3, Fig. 3 be the corresponding input data of gamma value with it is defeated
Voltage curve out, in Fig. 3, V1~V7 indicates that positive polarity voltage, V8~V14 indicate reverse voltage, wherein V1 and V14, V2
With V13, V3 and V12, V4 and V11, V5 and V10, V6 and V9, V7 and V8 respectively indicate that amplitude is identical, and opposite polarity one group just
Pole polar voltages, in the present embodiment, for example, when the difference of V1 to Vcom is equal with the difference of V14 to Vcom, display panel
Flicker value is decreased to default flicker value.
It is further, in step s3, described that at least three grayscale is tied up a little in above-described embodiment referring to Fig. 2
Gamma value is adjusted, and at least three grayscale is tied up brightness value a little and is adjusted to corresponding target brightness value, also
Include:
Step S32, gamma value a little is tied up according at least three grayscale after adjusting, at least three grayscale is tied up a little each
Positive polarity voltage value and reverse voltage value in self-corresponding output voltage values reversely adjust with amplitude, described in extremely
Few three grayscale tie up a little corresponding brightness value and reach corresponding target brightness value.
After tying up flashing a little to grayscale and being adjusted, the present embodiment can be tied up according to grayscale a little corresponding brightness value whether
Reach corresponding target brightness value to determine gamma regulated value.
In the present embodiment, it is to be understood that after tying up flicker value a little to grayscale to be tested and being adjusted, then adjust
Grayscale ties up gamma value a little, with grayscale is tied up positive polarity voltage value in a little corresponding output voltage values and reverse voltage value into
Row is reversely adjusted with amplitude.According to gamma value mathematical formulae (2) corresponding with output voltage,It is found that grayscale ties up a correspondence when being adjusted to gamma value
Brightness value can also change, and brightness is that the size of voltage value of liquid crystal molecule is driven to determine, therefore, gamma value tune
In whole process, when gamma value, by can simultaneously with the pressure difference of the increase positive polarity voltage and public electrode voltages of amplitude, and
Reverse voltage or reduces positive polarity voltage and public electrode voltages with amplitude simultaneously to the pressure difference of public electrode voltages
Pressure difference and reverse voltage can make each grayscale tie up a little corresponding brightness value and reach respective to the pressure difference of public electrode voltages
Corresponding target brightness value determines gamma regulated value, adjusts to realize to the gamma value of display panel.Wherein, in formula
(2) in, Lv0 is 0 rank gray-scale intensity values, and Lv (M) is most high-order gray-scale intensity values, and n is more than or equal to 0 and to be less than or equal to M
Integer.In the present embodiment, 0 grayscale indicates the minimum gray scale of display panel, and M then indicates the highest grayscale of display panel.
Further, in above-described embodiment, at least three grayscale is tied up one of them in a little and is tied up a little for the centre.
In the present embodiment, a small amount of grayscale can be chosen to obtain the grayscale of display panel to be measured and tie up a little, as point of adjustment, originally
Embodiment is chosen as at least three grayscale of selection and ties up a little, and ties up gamma value a little to three grayscale and be adjusted, practical right
When display panel is tested, 7 grayscale can be chosen and tied up as test point, for example, in 256 grayscale of 8bit, grayscale is 0 to arrive
255, such as 255,254,223,128,64,31,1 and 0 grayscale can be chosen, gamma value a little then is tied up to these grayscale and is adjusted
Section.The centre that one of them in a little is display panel is tied up in selected grayscale to tie up a little, is carried out tying up gamma value a little to centre
When adjusting, since in order to guarantee that gamma ties up the accuracy that asymmetry a little is adjusted, the present embodiment is first in display panel
Between under grayscale ties up a little, the public electrode voltages Vcom that will acquire is adjusted to optimal.Therefore, it then carries out step 3 pair centre and ties up
When point progress gamma ties up the adjusting of asymmetry a little, no longer need to tie up centre the positive polarity voltage in a little corresponding output voltage values
Value and reverse voltage value are adjusted with amplitude in the same direction, can directly be adjusted after centre ties up point value, be tied up a little corresponding output to grayscale
Positive polarity voltage value and reverse voltage value in voltage value reversely adjust with amplitude.So set, display can be shortened
The testing time that gamma value is adjusted improves testing efficiency.
The present invention also proposes that a kind of gamma value adjusting device of display panel, the gamma value adjusting device include:
Optical sensor ties up brightness value a little for obtaining grayscale on display panel to be measured；
Processor, for running gamma value debugging routine；
Memory, for storing the gamma value debugging routine that can be run on the processor；Wherein,
The optical sensor is electrically connected with the processor, and the gamma value adjusts real when program is executed by the processor
Now the step of gamma value adjusting method of display panel as described above.
Referring to Fig. 4, Fig. 4 is that the gamma value adjusting device hardware for the display panel that the embodiment of the present invention is related to runs ring
The terminal structure schematic diagram in border.
The terminal of the embodiment of the present invention can be PC, be also possible to smart phone, tablet computer, E-book reader, MP4
(Moving Picture Experts Group Audio Layer IV, dynamic image expert's compression standard audio level 3) is broadcast
Put the packaged type terminal device having a display function such as device, portable computer.As described in Figure 1, which may include processing
Device 1001 (such as CPU), communication bus 1002, user interface 1003, network interface 1004, memory 1005, optical sensor
1006.Wherein, for communication bus 1002 for realizing the connection communication between these components, it is total which can be UART
Line, I2C bus；User interface 1003 may include display panel (Display), input unit such as keyboard (Keyboard)；
Network interface 1004 optionally may include standard wireline interface and wireless interface (such as WI-FI interface)；Memory 1005 can be with
It is high speed RAM memory, is also possible to stable memory (non-volatile memory), such as magnetic disk storage, stores
Device 1005 optionally can also be the storage device independently of aforementioned processor 1001；The optical sensor 1006 is total by communication
Line 1002 is electrically connected with the processor 1001.
It will be understood by those skilled in the art that the terminal knot of gamma value adjusting device hardware running environment shown in Fig. 3
Structure is not constituted to the invention shows the restriction of the gamma value adjusting device of panel, may include than illustrating more or fewer portions
Part perhaps combines certain components or different component layouts.
The present invention also proposes a kind of computer readable storage medium, is stored with gamma on the computer readable storage medium
Value adjusts program, and the gamma value, which is adjusted, realizes that the gamma value of display panel as described above is adjusted when program is executed by processor
The step of method.
With continued reference to Fig. 4, the memory 1005 in Fig. 4 as a kind of computer storage medium may include operating system,
Network communication module, Subscriber Interface Module SIM and gamma value debugging routine.
In terminal shown in Fig. 3, network interface 1004 is mainly used for connecting Cloud Server, carries out data with Cloud Server
Communication；Network interface 1004 is also used to connect for providing anti-string goods platform, and the anti-string goods platform includes each for providing
The general utility functions module of service function.User interface 1003 can connect client (user terminal), and it is logical to carry out data with client
Letter；And processor 1001 can be used for calling the gamma value debugging routine stored in memory 1005, and execute above-mentioned display surface
The debugging step of the gamma value adjusting method of plate.
Wherein, the gamma value adjusting method program of display panel be performed realized method can refer to the invention shows
Each embodiment of the gamma value adjusting method of panel, details are not described herein again.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (8)
1. a kind of gamma value adjusting method of display panel, which is characterized in that the gamma value adjusting method packet of the display panel
Include following steps:
Step S1, the public electrode voltages of display panel to be measured are obtained；
Step S2, in the case where the intermediate grayscale of display panel is tied up a little, the public electrode voltages of the display panel are adjusted,
The flicker value of the display panel is adjusted to preset minimum flicker value；
Step S3, at least three grayscale for obtaining display panel to be measured tie up initial gamma value and target brightness value a little, and to institute
The initial gamma value that at least three grayscale are tied up a little is stated to be adjusted, by the flicker value of display panel to be measured be decreased to it is preset most
After small flicker value, gamma value a little is tied up at least three grayscale again and is adjusted, at least three grayscale is tied up
The brightness value of point is adjusted to corresponding target brightness value；
Step S4, circulation executes the step S2 to the step S3, until the intermediate grayscale ties up the matching of gamma value a little in advance
If target gamma value section.
2. the gamma value adjusting method of display panel as described in claim 1, which is characterized in that the step S2 is specifically wrapped
It includes:
Step S21, the most high-order for obtaining the display panel to be measured ties up brightness value a little and lowest-order ties up brightness value a little, and root
Brightness value a little is tied up according to the most high-order, lowest-order ties up brightness value a little and at least three grayscale ties up preset target a little
Gamma value calculates at least three grayscale and ties up a little corresponding target brightness value.
3. the gamma value adjusting method of display panel as claimed in claim 2, which is characterized in that in the step S21, calculate
At least three grayscale is tied up a little corresponding target brightness value Lv (n) and is specifically included out:
According to the first preset formulaDescribed in being calculated described in calculating extremely
Few three grayscale tie up a little corresponding target brightness value Lv (n), wherein Lv0 is the brightness value of 0 rank grayscale；Lv (M) is highest
The brightness value of rank grayscale；N is that at least three grayscale ties up a little corresponding grayscale, and n is the integer greater than 0 and less than M.
4. the gamma value adjusting method of display panel as described in claim 1, which is characterized in that in the step S3, to institute
The initial gamma value that at least three grayscale are tied up a little is stated to be adjusted, by the flicker value of display panel to be measured be decreased to it is preset most
Small flicker value, further includes:
Step S31, initial gamma value a little is tied up according at least three grayscale after adjusting, at least three grayscale is tied up
Positive polarity voltage value and reverse voltage value in the corresponding output voltage values of point are adjusted with amplitude in the same direction, until described aobvious
Show that the flicker value of panel is decreased to default flicker value.
5. the gamma value adjusting method of display panel as described in claim 1, which is characterized in that described in the step S3
Gamma value a little is tied up at least three grayscale to be adjusted, and at least three grayscale is tied up into brightness value a little and is adjusted to
Corresponding target brightness value, further includes:
Step S32, gamma value a little is tied up according at least three grayscale after adjusting, at least three grayscale is tied up a little each
Positive polarity voltage value and reverse voltage value in self-corresponding output voltage values reversely adjust with amplitude, described in extremely
Few three grayscale tie up a little corresponding brightness value and reach corresponding target brightness value.
6. the gamma value adjusting method of the display panel as described in claim 1 to 5 any one, which is characterized in that it is described extremely
Few three grayscale are tied up one of them in a little and are tied up a little for the centre.
7. a kind of gamma value adjusting device of display panel, which is characterized in that the gamma value adjusting device includes:
Optical sensor ties up brightness value a little for obtaining grayscale on display panel to be measured；
Processor, for running gamma value debugging routine；
Memory, for storing the gamma value debugging routine that can be run on the processor；Wherein,
The optical sensor is electrically connected with the processor, and the gamma value is adjusted when program is executed by the processor and realized such as
The step of gamma value adjusting method of display panel described in any one of claim 1 to 6.
8. a kind of computer readable storage medium, which is characterized in that be stored with gamma value on the computer readable storage medium
Program is adjusted, the gamma value, which is adjusted, realizes showing as described in any one of claim 1 to 6 when program is executed by processor
The step of showing the gamma value adjusting method of panel.
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