CN110021272A - GAMMA adjusting method, device, computer and the storage medium of display module - Google Patents
GAMMA adjusting method, device, computer and the storage medium of display module Download PDFInfo
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
This application involves GAMMA adjusting method, device, computer and the storage mediums of a kind of display module.The described method includes: obtaining object brightness；Obtain reference brightness；Obtain coefficient of relationship；According to the reference brightness, the object brightness and the coefficient of relationship, the relational expression of difference and brightness value based on register value calculates and obtains the corresponding target offset amount of the object brightness；According to reference register value and the target offset amount, calculates and obtain target register values.According to the reference brightness, the object brightness and the coefficient of relationship, the relational expression of difference and brightness value based on register value, it calculates and obtains the corresponding target offset amount of the object brightness, and then calculate and obtain target register values, the GAMMA adjusting to display module is realized, has the advantages that regulating effect is preferable, furthermore, so that GAMMA adjusting is more efficient, and it is effectively simplified regulation flow process, effectively reduces production cost.
Description
Technical field
The present invention relates to FPD manufacturing technology fields, GAMMA adjusting method, dress more particularly to display module
It sets, computer and storage medium.
Background technique
Currently, traditional AMOLED (Active-matrix organic light-emitting diode, active matrix
Organic light emitting diode) display module due to RGB (RGB) luminous efficiency and process deviation influence, every display module
GAMMA program can not be compatible with use, it is necessary to every display module but palpus progress GAMMA adjusting, so that the light that display module issues
It meets the requirements.Traditional GAMMA adjustment process, process is more many and diverse, and needs to cause to adjust low efficiency by repeatedly test
Under, in addition, degree of regulation is not high.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide GAMMA adjusting method, device, the meter of a kind of display module
Calculation machine and storage medium.
A kind of GAMMA adjusting method of display module, which comprises
Obtain object brightness；
Obtain reference brightness；
Obtain coefficient of relationship；
According to the reference brightness, the object brightness and the coefficient of relationship, based on the difference of register value with it is bright
The relational expression of angle value calculates and obtains the corresponding target offset amount of the object brightness；
According to reference register value and the target offset amount, calculates and obtain target register values.
The step of acquisition reference brightness includes: in one of the embodiments,
Obtain two unequal reference brightnesses；
The step of acquisition coefficient of relationship includes:
According to two unequal reference brightnesses, calculates and obtain the coefficient of relationship.
It is described according to two unequal reference brightnesses in one of the embodiments, it calculates and obtains the relationship
The step of coefficient includes:
Obtain default register value；
The brightness that the display module is shone based on the default register value is detected, the first reference brightness is obtained；
Obtain offset register values；
The brightness that the display module is shone based on the offset register values is detected, the second reference brightness is obtained；
According to first reference brightness and second reference brightness, the pass of difference and brightness value based on register value
It is formula, calculates and obtain coefficient of relationship.
The step of acquisition offset register values include: in one of the embodiments,
Obtain default bias amount；
According to the default register value and the default bias amount, calculates and obtain offset register values.
The step of acquisition object brightness includes: in one of the embodiments,
Obtain the maximum brightness of display module；
According to the maximum brightness, it is corresponding to calculate the multiple grayscale values of acquisition for the corresponding relationship based on grayscale value and brightness value
Object brightness.
It is described according to the maximum brightness value in one of the embodiments, based on grayscale value pass corresponding with brightness value
System, calculating the step of obtaining multiple grayscale values corresponding target brightness value includes:
It is more to be calculated based on the corresponding relationship of grayscale value and brightness value in GAMMA formula for acquisition according to the maximum brightness value
The corresponding target brightness value of a grayscale value.
A kind of GAMMA regulating device of display module, described device include:
Object brightness obtains module, for obtaining object brightness；
Reference brightness obtains module, for obtaining reference brightness；
Coefficient of relationship obtains module, for obtaining coefficient of relationship；
Target offset amount computing module is used for according to the reference brightness, the object brightness and the coefficient of relationship,
The relational expression of difference and brightness value based on register value calculates and obtains the corresponding target offset amount of the object brightness；
Target register values computing module, for calculating and obtaining mesh according to reference register value and the target offset amount
Scalar register file value.
The reference brightness obtains module and is also used to obtain two unequal references in one of the embodiments,
Brightness；
The coefficient of relationship obtains module and is also used to calculate according to two unequal reference brightnesses and obtain the pass
Coefficient.
A kind of computer equipment can be run on a memory and on a processor including memory, processor and storage
Computer program, the processor perform the steps of when executing the computer program
Obtain object brightness；
Obtain reference brightness；
Obtain coefficient of relationship；
According to the reference brightness, the object brightness and the coefficient of relationship, based on the difference of register value with it is bright
The relational expression of angle value calculates and obtains the corresponding target offset amount of the object brightness；
According to reference register value and the target offset amount, calculates and obtain target register values.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
It is performed the steps of when row
Obtain object brightness；
Obtain reference brightness；
Obtain coefficient of relationship；
According to the reference brightness, the object brightness and the coefficient of relationship, based on the difference of register value with it is bright
The relational expression of angle value calculates and obtains the corresponding target offset amount of the object brightness；
According to reference register value and the target offset amount, calculates and obtain target register values.
GAMMA adjusting method, device, computer and the storage medium of above-mentioned display module, according to the reference brightness, institute
Object brightness and the coefficient of relationship are stated, the relational expression of difference and brightness value based on register value calculates and obtains the mesh
The corresponding target offset amount of brightness is marked, and then calculates and obtains target register values, realizes the GAMMA adjusting to display module,
Have the advantages that regulating effect is preferable, in addition, it is more efficient to adjust GAMMA, and is effectively simplified regulation flow process, effectively drops
Low production cost.
Detailed description of the invention
Fig. 1 is the applied environment figure of the GAMMA adjusting method of display module in one embodiment；
Fig. 2 is the flow diagram of the GAMMA adjusting method of display module in one embodiment；
Fig. 3 is the structural block diagram of the GAMMA regulating device of display module in one embodiment；
Fig. 4 is the internal structure chart of computer equipment in one embodiment；
Fig. 5 is the AMOLED driving circuit of an embodiment and the electrical block diagram of pixel unit；
Fig. 6 is the electrical block diagram of the GAMMA circuit of an embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
The GAMMA adjusting method of display module provided by the present application, can be applied in application environment as shown in Figure 1.
Wherein, optical device 102 is communicated by data-interface with computer 104.Wherein, computer 104 can use independent meter
The server cluster of calculation machine either multiple computers composition is realized.Optical device 102 is used to detect shining for display module
Brightness, the brightness value that then will test is sent to computer 104, and it is bright that computer 104 obtains the reference that optical device is sent
Degree, and object brightness is obtained, obtain coefficient of relationship；According to the reference brightness, the object brightness and the coefficient of relationship,
The relational expression of difference and brightness value based on register value calculates and obtains the corresponding target offset amount of the object brightness；According to
Reference register value and the target offset amount calculate and obtain target register values.
It is noted that the display device in following example is organic light-emitting display device, i.e. AMOLED
(Active-matrix organic light-emitting diode, active matrix organic light-emitting diode) display device.
In one embodiment, it as shown in Fig. 2, providing a kind of GAMMA adjusting method of display module, answers in this way
For being illustrated for the terminal in Fig. 1, comprising the following steps:
Step 210, object brightness is obtained.
Specifically, which is the required luminous brightness of luminescent device.The object brightness is in display module
The required luminous brightness of luminescent device.It can be appreciated that the object brightness is the required of pixel unit in display module
Luminous brightness.The display module is AMOLED display module.The object brightness is that display of the display module in a grayscale is bright
Degree, different grayscale correspond to different object brightnesses.The object brightness is preferable brightness of the display module in corresponding grayscale,
Enable to display effect preferable.Specifically, luminescent device is organic luminescent device, which is in display module
Luminescence unit, pixel unit includes luminescence unit.The connection structure of the pixel unit and its driving circuit is as shown in Figure 5.
Due to the object brightness be it is corresponding with grayscale, it is corresponding each grayscale value can be calculated by grayscale value
Object brightness.One embodiment is to obtain target brightness value.One embodiment is to calculate and obtain target brightness value.One implementation
Example is to be calculated according to target gray scale value and obtain target brightness value.
Step 230, reference brightness is obtained.
In the present embodiment, which is known brightness, which is that display module is aobvious in a grayscale
Show luminous brightness.The reference brightness is the currently practical luminous brightness of luminescent device in display module.It can be appreciated that
The reference brightness is the currently practical luminous brightness of pixel unit in display module.
One embodiment is to obtain reference brightness value.One embodiment is that detection obtains reference brightness value, specifically, inspection
Display module is surveyed, reference brightness is obtained.In the present embodiment, brightness detection is carried out to display module, detection obtains pixel unit
Luminous brightness, i.e. reference brightness.
In other embodiment, reference brightness is the brightness value prestored, in the present embodiment, then without detecting in this step
Display module, it is also possible to obtain reference brightness.
Step 250, coefficient of relationship is obtained.
Specifically, the coefficient of relationship is calculated according to the difference and brightness value of register value and is obtained.One embodiment is institute
Stating coefficient of relationship is to be calculated to obtain according to the difference of register value and brightness value corresponding with register value.One embodiment
Be, the coefficient of relationship be according between two register values difference and with two register values one-to-one two it is bright
Angle value, which calculates, to be obtained.
In the present embodiment, register value is used for corresponding voltage value, which is the drive of the pixel unit in display module
Dynamic voltage.Specifically, the voltage of the GAMMA circuit of the driving IC (Integrated Circuit, at circuit) of AMOLED is base
In parallel resistance string, i.e., driving IC is generated and exported to the section between the maximum voltage value and minimum voltage of pixel unit, etc.
It is divided into several component of voltage, the corresponding RGB GAMMA node of each component of voltage gives each RGB GAMMA node
One register value reg is set, then the difference of each component of voltage is VΔ, indicate the difference of two adjacent voltage values.In this way,
Each register value is to component of voltage one by one, and difference between counter register value can be obtained corresponding quantity
Component of voltage can calculate the voltage value of the node.
In this way, can get the voltage value of corresponding node based on the difference between the storage value, in the driving of the voltage value
Under, pixel unit then issues the light of corresponding brightness.Therefore, the corresponding brightness value of each register value, the difference of register value
Relational expression between two brightness values is corresponding.In this step, by difference between counter register value and corresponding bright
Angle value can calculate the difference of reflection register value and the coefficient of relationship of brightness value relationship.That is, the difference of register value and two
A brightness value is positively correlated functional relation, then the difference of register value and the coefficient of the positive correlation function of two brightness values are relationship
Coefficient.
Step 270, according to the reference brightness, the object brightness and the coefficient of relationship, based on register value
The relational expression of difference and brightness value calculates and obtains the corresponding target offset amount of the object brightness.
One embodiment is, according to the reference brightness, the object brightness and the coefficient of relationship, to be based on register
The relational expression of the difference of value and two brightness values calculates and obtains the corresponding target offset amount of the object brightness.
Specifically, target offset amount is the offset of register value.The offset can be understood as difference.According to known
Register value and target offset amount, can calculate the register value of target.
It is noted that due to the corresponding brightness of each register value, the difference of register value and two brightness values pair
It answers.Therefore, in this step, after obtaining reference brightness and object brightness, acquisition reference brightness can be calculated and target is bright
Relational expression between degree can calculate on the basis of the difference of register value and the relational expression of brightness value according to coefficient of relationship
Obtain target offset amount.The target offset amount is corresponding with object brightness.
Step 290, it according to reference register value and the target offset amount, calculates and obtains target register values.
Specifically, the reference register value is corresponding with reference brightness.The pixel unit of display module is based on the reference and posts
The luminous brightness of storage value is reference brightness.
Since target offset amount is the offset of register value, it is based on known reference register value, can be calculated
Obtain target register values.One embodiment is summed to reference register value and the target offset amount, is calculated and is obtained target
Register value.
It should be understood that target register values are corresponding with object brightness, the target register values are based on, driving IC can
Component of voltage corresponding with the target register values is obtained, and then obtains corresponding target voltage, is driven based on the target voltage
Pixel unit luminescence display, so that the brightness for the light that pixel unit issues is object brightness, so that pixel unit issued
The brightness of light reaches requirement, so that display effect is more preferably.
In above-described embodiment, according to the reference brightness, the object brightness and the coefficient of relationship, it is based on register
The difference of value and the relational expression of brightness value calculate and obtain the corresponding target offset amount of the object brightness, and then calculate and obtain mesh
Scalar register file value realizes the GAMMA adjusting to display module, a standard song is presented in each gray-scale intensity of display module
Line has the advantages that regulating effect is preferable, in addition, it is more efficient to adjust GAMMA, and is effectively simplified regulation flow process, has
Effect reduces production cost.
It is noted that since the difference that coefficient of relationship is register value calculates acquisition with two brightness values, it can
It can be calculated by two brightness values and obtain the coefficient of relationship, it is in one embodiment, described in order to calculate acquisition coefficient of relationship
The step of obtaining reference brightness includes: to obtain two unequal reference brightnesses；The step of acquisition coefficient of relationship, wraps
It includes: according to two unequal reference brightnesses, calculating and obtain the coefficient of relationship.
One embodiment is that detection obtains two unequal reference brightnesses；It is unequal described with reference to bright according to two
Degree calculates and obtains the coefficient of relationship.One embodiment is, when display module is shone based on two different register values,
Detection obtains two unequal reference brightnesses；According to two unequal reference brightnesses, calculates and obtain the relationship system
Number.
In the present embodiment, reference brightness is the light emission luminance acquisition for detecting display module.Specifically, due to register value
The relational expression of difference and two unequal brightness values be it is determining, therefore, detection obtains two unequal brightness values
Coefficient of relationship is obtained to calculate.
It is noted that obtaining two unequal reference brightnesses, and calculate and closed with this in the present embodiment
The step of coefficient, can execute before step 210 and step 230, or between step 210 and step 230 into
Row.
It is in one embodiment, described according to two unequal reference brightnesses in order to calculate acquisition coefficient of relationship,
Calculating the step of obtaining the coefficient of relationship includes: to obtain default register value；It detects the display module and is based on described preset
The luminous brightness of register value, obtains the first reference brightness；Obtain offset register values；The display module is detected based on described
The luminous brightness of offset register values, obtains the second reference brightness；According to first reference brightness and described second with reference to bright
Degree, the relational expression of difference and brightness value based on register value calculate and obtain coefficient of relationship.
One embodiment is to obtain default register value；The display module is detected to send out based on the default register value
The brightness of light obtains the first reference brightness；Obtain offset register values；It detects the display module and is based on the offset register
The luminous brightness of value, obtains the second reference brightness；Calculate the difference obtained between offset register values and default register value, root
According to the difference between first reference brightness, second reference brightness and offset register values and default register value,
The relational expression of difference and two brightness values based on register value, calculates and obtains coefficient of relationship.
One embodiment be detect the pixel unit of the display module shone based on the default register value it is bright
Degree, one embodiment are the brightness for detecting the pixel unit of the display module and being shone based on the offset register values.
In this step, after getting default register value and offset register values, detection is based on display module base respectively
In the luminous brightness of default register value and offset register values, it can be detected and obtain the first reference brightness and second with reference to bright
Degree, due to the coefficient of relationship be according between two register values difference and with two register values one-to-one two
A brightness value, which calculates, to be obtained, and therefore, can pass through default register value, offset register values, the first reference brightness and the second ginseng
It examines brightness calculation and obtains coefficient of relationship.
It should be understood that the first reference brightness and the second reference brightness are to detect the luminous brightness of display module to obtain,
And the default register value can be the register value of default, be also possible to the value set according to debugging, and the shift register
Device value is calculated according to default register value.One embodiment is that the default register value is default register value.
In one embodiment, which is preset register value.In one embodiment, which is
According to the register value for receiving input command reception and storing.
In the above-described embodiments, it can be calculated by reference to brightness and reference register value and obtain target register values, one
Embodiment is that the reference brightness is the brightness to be shone based on display module based on the reference register value.One embodiment is,
The reference register value is default register value.One embodiment is that the reference brightness is that described lack is based on based on display module
Save the luminous brightness of register value.In the present embodiment, reference register value is the register value of default, and the reference brightness is then
Detect the brightness value that display module is shone based on the reference register value.
In order to be quickly obtained reference brightness value and reference register value, in one embodiment, which is the first ginseng
Brightness is examined, which is default register value, in the present embodiment, due to having obtained in calculated relationship coefficient
Therefore first reference brightness and default register value can calculate acquisition by first reference brightness and default register value
Target register values.
In other one embodiment, which is the second reference brightness, which is that offset is posted
Storage value, in the present embodiment, due to having obtained the second reference brightness and offset register values in calculated relationship coefficient, because
This, equally can calculate acquisition target register values by second reference brightness and offset register values.
In order to obtain offset register values, in one embodiment, the step of acquisition offset register values includes: to obtain
Take default bias amount；According to the default register value and the default bias amount, calculates and obtain offset register values.
Specifically, which is the numerical value of register value offset.In the present embodiment, it is based on existing default deposit
Device value is based on default bias amount to the default register value and deviates, obtains offset register values.One embodiment is to obtain
Take default bias amount；It sums to the default register value and the default bias amount, calculates and obtain offset register values.It obtains
It is luminous to may make that display module is carried out based on the offset register values for the offset register values.
It is noted that since default bias amount is the numerical value set according to debugging, in calculated relationship coefficient
When, it can directly be calculated according to default bias amount and obtain coefficient of relationship, without being calculated according to offset register values and default register
The difference of register value out, that is to say, that in the present embodiment, default bias amount is offset register values and default register
Difference.Therefore, in one embodiment, according to first reference brightness and second reference brightness, it is based on register value
Difference and two brightness values relational expression, calculate the step of obtaining coefficient of relationship are as follows: according to first reference brightness, described
Second reference brightness and default bias amount, the relational expression of difference and two brightness values based on register value, calculating are closed
Coefficient.
In order to obtain the corresponding object brightness of different grayscale, in one embodiment, the step of the acquisition object brightness
It include: the maximum brightness for obtaining display module；According to the maximum brightness, the corresponding relationship based on grayscale value and brightness value, meter
It calculates and obtains the corresponding object brightness of multiple grayscale values.
One embodiment is to obtain the maximum brightness of the pixel unit of display module.Specifically, which is pixel
The maximum brightness of unit white, that is, the pixel unit issue the maximum brightness of white light.Due to the corresponding hair of each grayscale
Brightness can calculate according to the corresponding relationship of grayscale value and brightness value then after the maximum brightness for getting white and obtain each ash
Rank is worth corresponding brightness, i.e. object brightness.
In one embodiment, described according to the maximum brightness value, the corresponding relationship based on grayscale value and brightness value, meter
Calculating the step of obtaining multiple grayscale values corresponding target brightness value includes: according to the maximum brightness value, based in GAMMA formula
The corresponding relationship of grayscale value and brightness value calculates and obtains the corresponding target brightness value of multiple grayscale values.
In the present embodiment, specifically, it is first determined the maximum target value x of the white of the pixel unit of display moduletargetw,
ytargetw, Ytargetw, i.e., white maximum brightness, due to the spontaneous light characteristic of AMOLED, the black picture of pixel unit is not send out
Light, therefore the minimum brightness of pixel unit is 0.Therefore, the range of the light emission luminance of pixel unit be black 0 to white
255.Therefore, the object brightness of each grayscale value is calculated according to GAMMA formula, coordinate is constant, GAMMA formula are as follows:
Ygray=YtargetW*(gray/255)γ
Wherein, YgrayFor the corresponding object brightness of the grayscale, YtargetwFor the maximum brightness of white, gray is grayscale value, γ
It can be arranged according to the gamma currently required that, be 2.2 in the present embodiment.By above-mentioned formula, it can calculate and obtain each ash
Rank is worth corresponding object brightness.
Here is the embodiment that a specific GAMMA is adjusted:
As shown in figure 5, in currently used AMOLED circuit, TFT (Thin Film Transistor, thin film transistor (TFT))
Current-voltage (I-V) relational expression are as follows:
Id=μ CoxW/L(Vgs-Vth)2——(1)
IdFor the electric current of OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode), CoxFor grid oxygen
Change layer capacitance, W is that capacitor is wide, and L is that capacitor is long.VGSFor the grid source bias of mos (metal-oxide-semiconductor field),
VthFor threshold voltage, μ is electron mobility.
And the electric current of OLED is directly proportional to the brightness of OLED, that is, has following formula:
Y=xId——(2)
X is the luminous efficiency of OLED, and Y is the brightness of OLED, IdTo pass through the electric current of OLED.
Formula (2) substitution formula (1) can be obtained:
Optical parameter (x, y, Y) can be obtained according to CIE optic test, color gamut space (X, Y, Z) can be converted into.
The RGB color domain relational expression of known optical test data are as follows:
Xw=xr/yr*Yr+xg/yg*Yg+xb/yb*Yb
Yw=Yr+Yg+Yb
Formula (4) substitution formula (5) can be obtained:
xw/yw*Yw=xr/yr*Yr+xg/yg*Yg+xb/yb*Yb
Yw=Yr+Yg+Yb
The coordinate that the RGB tri- of known AMOLED is monochromatic is determined by luminescent material, is fixed and invariable.Thus it can get RGB
Luminance component be Yr, Yg, Yb。
The GAMMA circuit voltage that current AMOLED driving IC is used is parallel resistance string, i.e., the pixel generated IC is defeated
Minimax voltage is divided into 2 outnA register value reg is arranged to each RGB GAMMA node, each in a component of voltage
Component difference is VΔ.By taking the GAMMA circuit of Fig. 6 as an example, since VGSP and VGMP can change according to display module demand, driving
Also certain boosting loss is had inside IC, therefore the accurate voltage of GAMMA node can not be accurately calculated according to register.No
It crosses, can get the difference value equation of two Vgs according to formula (3):
And then it is derived by:
Register variable can be obtained according to formula (7) and positively related relational expression is presented in brightness:
The formula (8) is the difference of register value and the relational expression of brightness value.
Specific GAMM adjustment process are as follows:
Firstly, determining a white maximum target value xtargetw、ytargetw、Ytargetw, wherein YtargetwIt is corresponding for white
Brightness, i.e. maximum brightness.Due to the spontaneous light characteristic of AMOLED, the black picture of mould group is non-luminous, so black is drawn
Face is minimum brightness, as 0.
The object brightness of each grayscale value gray is calculated according to GAMMA formula, coordinate is constant, GAMMA formula are as follows:
Ygray=Ytargetw*(gray/255)γ
YgrayFor the corresponding object brightness of the grayscale, YtargetwFor the maximum brightness of white, gray is grayscale value, and γ can root
It is arranged according to the gamma currently required that, in the present embodiment, which is 2.2.Each ash is calculated by above-mentioned GAMMA formula
The corresponding object brightness of rank.
Then, a default register value R is setreg、Greg、Breg, display module is luminous based on the default register value,
Measure the luminous corresponding white color coordinates x of display modulew、yw、Yw, R, G, B luminance component Y are calculated by formula (6)r、Yg、
Yb.This step corresponds to the acquisition default register value in above-described embodiment, detects the display module and is posted based on described preset
The luminous brightness of storage value, obtains the first reference brightness, wherein default register value Rreg、Greg、Breg, as default register
Value, the YwAs the first reference brightness.
It is noted that in the present embodiment, it is real using optical device CA310 to the light emission luminance detection of display module
It is existing.
Then, an offset N re-test is arranged to default register, new RGB luminance component Y can be measuredr’、Yg’、
Yb'.Specifically, in this step, offset N is default bias amount, is carried out according to default bias amount to default register value
Offset obtains offset register values, and display module is shone based on the offset register values, in such manner, it is possible to measure second with reference to bright
Spend Yr’、Yg’、Yb’。
Then, offset N and luminance component are substituted into formula (8), can calculates and obtains αr、αg、αb, wherein offset
N is Δ reg, Δ reg, YrAnd Yr' calculate acquisition αr, Δ reg, YgAnd Yg' calculate acquisition α g, Δ reg, YbAnd Yb' calculate and obtain
Obtain αb。
Then, the corresponding luminance component of each object brightness is substituted into the deposit of formula (8) available object brightness again
Device value and default register value Rreg、Greg、BregVector, the vector be object brightness register value and default register
Value Rreg、Greg、BregBetween offset, i.e. target offset amount finally calculates the register value of object brightness.
Finally, the target register values calculated feeding mould group is retested, display module can be surveyed and be based on target
The luminous brightness of register value, to verify whether the brightness is object brightness.
It is noted that factor alpha has deviation at different brightnesses due to the IR_DROP factor of AMOLED, so
When test obtains new optical data and excessive object brightness deviation, recalculates α value and bring calculating into, until obtaining target value
Until.
It should be understood that although each step in the flow chart of Fig. 2 is successively shown according to the instruction of arrow, this
A little steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly state otherwise herein, these steps
It executes there is no the limitation of stringent sequence, these steps can execute in other order.Moreover, at least part in Fig. 2
Step may include that perhaps these sub-steps of multiple stages or stage are executed in synchronization to multiple sub-steps
It completes, but can execute at different times, the execution sequence in these sub-steps or stage, which is also not necessarily, successively to be carried out,
But it can be executed in turn or alternately at least part of the sub-step or stage of other steps or other steps.
In one embodiment, as shown in figure 3, providing a kind of GAMMA regulating device of display module, including target is bright
Degree obtains module 310, reference brightness obtains module 330, coefficient of relationship obtains module 350,370 and of target offset amount computing module
Target register values computing module 390, wherein
Object brightness obtains module 310 for obtaining object brightness；
Reference brightness obtains module 330 for obtaining reference brightness；
Coefficient of relationship obtains module 350 for obtaining coefficient of relationship；
Target offset amount computing module 370 is used for according to the reference brightness, the object brightness and the relationship system
Number, the relational expression of difference and brightness value based on register value calculate and obtain the corresponding target offset amount of the object brightness；
Target register values computing module 390 is used to calculate and obtain according to reference register value and the target offset amount
Target register values.
In one embodiment, it is bright to be also used to obtain two unequal references for the reference brightness acquisition module
Degree；The coefficient of relationship obtains module and is also used to calculate according to two unequal reference brightnesses and obtain the relationship system
Number.
In one embodiment, the coefficient of relationship acquisition module includes:
Default register value acquiring unit, for obtaining default register value；
First reference brightness acquiring unit, for detect the display module based on the default register value shine it is bright
Degree obtains the first reference brightness；
Offset register values acquiring unit, for obtaining offset register values；
Second reference brightness acquiring unit, for detect the display module based on the offset register values shine it is bright
Degree obtains the second reference brightness；
Coefficient of relationship computing unit, for being based on deposit according to first reference brightness and second reference brightness
The difference of device value and the relational expression of brightness value calculate and obtain coefficient of relationship.
In one embodiment, the offset register values acquiring unit includes:
Default bias amount obtains subelement, for obtaining default bias amount；
Offset register values computation subunit, for calculating according to the default register value and the default bias amount
Obtain offset register values.
In one embodiment, the object brightness acquisition module includes:
Maximum brightness acquiring unit, for obtaining the maximum brightness of display module；
Object brightness computing unit, for according to the maximum brightness, the corresponding relationship based on grayscale value and brightness value to be counted
It calculates and obtains the corresponding object brightness of multiple grayscale values.
In one embodiment, the object brightness computing unit is also used to be based on GAMMA according to the maximum brightness value
The corresponding relationship of grayscale value and brightness value in formula calculates and obtains the corresponding target brightness value of multiple grayscale values.
In one embodiment, provide a kind of computer equipment, the computer equipment can be personal computer or
Server, internal structure chart can be as shown in Figure 4.The computer equipment includes the processor connected by system bus, deposits
Reservoir, network interface and database.Wherein, the processor of the computer equipment is for providing calculating and control ability.The calculating
The memory of machine equipment includes non-volatile memory medium, built-in storage.The non-volatile memory medium be stored with operating system,
Computer program and database.The built-in storage is the operation of the operating system and computer program in non-volatile memory medium
Environment is provided.The GAMMA that the database of the computer equipment is used to store display module adjusts data.The number of the computer equipment
It is used for and optical device or imaging sensor connection communication according to interface.To realize one kind when the computer program is executed by processor
The GAMMA adjusting method of display module.
It will be understood by those skilled in the art that structure shown in Fig. 4, only part relevant to application scheme is tied
The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment
It may include perhaps combining certain components or with different component layouts than more or fewer components as shown in the figure.
In one embodiment, a kind of computer equipment is provided, including memory, processor and storage are on a memory
And the computer program that can be run on a processor, processor perform the steps of when executing computer program
Obtain object brightness.
Obtain reference brightness.
Obtain coefficient of relationship.
According to the reference brightness, the object brightness and the coefficient of relationship, based on the difference of register value with it is bright
The relational expression of angle value calculates and obtains the corresponding target offset amount of the object brightness.
According to reference register value and the target offset amount, calculates and obtain target register values.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain two unequal reference brightnesses.
The step of acquisition coefficient of relationship includes:
According to two unequal reference brightnesses, calculates and obtain the coefficient of relationship.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain default register value.
The brightness that the display module is shone based on the default register value is detected, the first reference brightness is obtained.
Obtain offset register values.
The brightness that the display module is shone based on the offset register values is detected, the second reference brightness is obtained.
According to first reference brightness and second reference brightness, the pass of difference and brightness value based on register value
It is formula, calculates and obtain coefficient of relationship.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain default bias amount.
According to the default register value and the default bias amount, calculates and obtain offset register values.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain the maximum brightness of display module.
According to the maximum brightness, it is corresponding to calculate the multiple grayscale values of acquisition for the corresponding relationship based on grayscale value and brightness value
Object brightness.
In one embodiment, it is also performed the steps of when processor executes computer program
It is more to be calculated based on the corresponding relationship of grayscale value and brightness value in GAMMA formula for acquisition according to the maximum brightness value
The corresponding target brightness value of a grayscale value.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program performs the steps of when being executed by processor
Obtain object brightness.
Obtain reference brightness.
Obtain coefficient of relationship.
According to the reference brightness, the object brightness and the coefficient of relationship, based on the difference of register value with it is bright
The relational expression of angle value calculates and obtains the corresponding target offset amount of the object brightness.
According to reference register value and the target offset amount, calculates and obtain target register values.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain two unequal reference brightnesses.
The step of acquisition coefficient of relationship includes:
According to two unequal reference brightnesses, calculates and obtain the coefficient of relationship.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain default register value.
The brightness that the display module is shone based on the default register value is detected, the first reference brightness is obtained.
Obtain offset register values.
The brightness that the display module is shone based on the offset register values is detected, the second reference brightness is obtained.
According to first reference brightness and second reference brightness, the pass of difference and brightness value based on register value
It is formula, calculates and obtain coefficient of relationship.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain default bias amount.
According to the default register value and the default bias amount, calculates and obtain offset register values.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain the maximum brightness of display module.
According to the maximum brightness, it is corresponding to calculate the multiple grayscale values of acquisition for the corresponding relationship based on grayscale value and brightness value
Object brightness.
In one embodiment, it is also performed the steps of when computer program is executed by processor
It is more to be calculated based on the corresponding relationship of grayscale value and brightness value in GAMMA formula for acquisition according to the maximum brightness value
The corresponding target brightness value of a grayscale value.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of GAMMA adjusting method of display module characterized by comprising
Obtain object brightness；
Obtain reference brightness；
Obtain coefficient of relationship；
According to the reference brightness, the object brightness and the coefficient of relationship, difference and brightness value based on register value
Relational expression, calculate and obtain the corresponding target offset amount of the object brightness；
According to reference register value and the target offset amount, calculates and obtain target register values.
2. the method according to claim 1, wherein the step of acquisition reference brightness, includes:
Obtain two unequal reference brightnesses；
The step of acquisition coefficient of relationship includes:
According to two unequal reference brightnesses, calculates and obtain the coefficient of relationship.
3. according to the method described in claim 2, it is characterized in that, described according to two unequal reference brightnesses, meter
Calculating the step of obtaining the coefficient of relationship includes:
Obtain default register value；
The brightness that the display module is shone based on the default register value is detected, the first reference brightness is obtained；
Obtain offset register values；
The brightness that the display module is shone based on the offset register values is detected, the second reference brightness is obtained；
According to first reference brightness and second reference brightness, the relationship of difference and brightness value based on register value
Formula calculates and obtains coefficient of relationship.
4. according to the method described in claim 3, it is characterized in that, the step of acquisition offset register values include:
Obtain default bias amount；
According to the default register value and the default bias amount, calculates and obtain offset register values.
5. the method according to claim 1, wherein the step of acquisition object brightness, includes:
Obtain the maximum brightness of display module；
According to the maximum brightness, the corresponding relationship based on grayscale value and brightness value calculates and obtains the corresponding mesh of multiple grayscale values
Mark brightness.
6. according to the method described in claim 5, it is characterized in that, described according to the maximum brightness value, based on grayscale value with
The corresponding relationship of brightness value, calculating the step of obtaining multiple grayscale values corresponding target brightness value includes:
It calculates based on the corresponding relationship of grayscale value and brightness value in GAMMA formula according to the maximum brightness value and obtains multiple ashes
Rank is worth corresponding target brightness value.
7. a kind of GAMMA regulating device of display module, which is characterized in that described device includes:
Object brightness obtains module, for obtaining object brightness；
Reference brightness obtains module, for obtaining reference brightness；
Coefficient of relationship obtains module, for obtaining coefficient of relationship；
Target offset amount computing module, for being based on according to the reference brightness, the object brightness and the coefficient of relationship
The difference of register value and the relational expression of brightness value calculate and obtain the corresponding target offset amount of the object brightness；
Target register values computing module, for calculating acquisition target and posting according to reference register value and the target offset amount
Storage value.
8. device according to claim 7, which is characterized in that the reference brightness obtains module and is also used to obtain two not
The equal reference brightness；
The coefficient of relationship obtains module and is also used to calculate according to two unequal reference brightnesses and obtain the relationship system
Number.
9. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes any one of claims 1 to 5 institute when executing the computer program
The step of stating method.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method described in any one of claims 1 to 5 is realized when being executed by processor.
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