CN109493801A - Gamma correction method, gamma correcting device and electronic equipment having a display function - Google Patents
Gamma correction method, gamma correcting device and electronic equipment having a display function Download PDFInfo
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- CN109493801A CN109493801A CN201910027835.9A CN201910027835A CN109493801A CN 109493801 A CN109493801 A CN 109493801A CN 201910027835 A CN201910027835 A CN 201910027835A CN 109493801 A CN109493801 A CN 109493801A
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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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- 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
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Picture Signal Circuits (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Present disclose provides a kind of gamma correction method, gamma correcting device and electronic equipments having a display function, belong to field of display technology.The gamma correction method includes obtaining to refer to gamma curve, and the maximum brightness with reference to gamma curve is setting brightness；It obtains and refers to gamma parameter, described includes the correction parameter of each grayscale with reference to gamma curve with reference to gamma parameter；Target maximum brightness is obtained, the target maximum brightness is not more than the setting brightness；According to the target maximum brightness, target gamma curve is obtained；According to the target gamma curve, the reference gamma curve and the reference gamma parameter, target gamma parameter is obtained, the target gamma parameter includes the correction parameter of each grayscale of the target gamma curve.The gamma correction method can reduce the gamma correction number of display device, reduce the cost of display device.
Description
Technical field
This disclosure relates to field of display technology more particularly to a kind of gamma correction method, gamma correcting device and have aobvious
Show the electronic equipment of function.
Background technique
Display device usually requires to carry out gamma (Gamma) correction, wants so that its grayscale meets gamma curve with brightness
It asks.For example, due to AMOLED (active-matrix organic light emitting diode) using compensation circuit to improve MURA (colour-difference
It is different) etc. situations, internal circuit it is more complicated；AMOLED product at present at this stage the case where be each flake products require carry out
Individual gamma correction.
In the prior art, under a refreshing frame per second, it usually needs to display device under multiple and different maximum brightness
Gamma correction is carried out, the corresponding gamma register parameter of each maximum brightness is obtained.Multiple groups gamma correction makes display device
Productive temp extends, and yield reduces, and increases the cost of display device.
Above- mentioned information disclosed in the background technology part are only used for reinforcing the understanding to the background of the disclosure, therefore it can
To include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of gamma correction method, gamma correcting device and electronics having a display function
Equipment can reduce the number of gamma correction.
For achieving the above object, the disclosure adopts the following technical scheme that
According to the first aspect of the disclosure, a kind of gamma correction method is provided, comprising:
It obtains and refers to gamma curve, the maximum brightness with reference to gamma curve is setting brightness；
It obtains and refers to gamma parameter, described includes the correction of each grayscale with reference to gamma curve with reference to gamma parameter
Parameter；
Target maximum brightness is obtained, the target maximum brightness is not more than the setting brightness；
According to the target maximum brightness, target gamma curve is obtained；
According to the target gamma curve, the reference gamma curve and the reference gamma parameter, target gamma is obtained
Parameter, the target gamma parameter include the correction parameter of each grayscale of the target gamma curve.
In a kind of exemplary embodiment of the disclosure, acquisition includes: with reference to gamma curve
Obtain a standard gamma curve；
Obtain the setting brightness；
Gamma curve is referred to according to the standard gamma curve and the setting luminance acquisition.
In a kind of exemplary embodiment of the disclosure, according to the target maximum brightness, target gamma curve packet is obtained
It includes:
The target is obtained according to the standard gamma curve or the reference gamma curve and the target maximum brightness
Gamma curve.
In a kind of exemplary embodiment of the disclosure, according to target gamma curve, with reference to gamma curve and with reference to gamma
Parameter, obtaining target gamma parameter includes:
According to the target gamma curve and it is described refer to gamma curve, establish target mapping relations, the target mapping
Relationship is the mapping relations between each grayscale and the grayscale with reference to gamma curve of the target gamma curve；
According to the target mapping relations and each grayscale for obtaining the target gamma curve with reference to gamma parameter
Correction parameter.
In a kind of exemplary embodiment of the disclosure, according to the target gamma curve and it is described refer to gamma curve,
Establishing target mapping relations includes:
Obtain each grayscale of the target gamma curve；
After the grayscale for obtaining any target gamma curve, the grayscale of the target gamma curve is obtained in the target
Brightness on gamma curve obtains the brightness in the grayscale with reference on gamma curve.
In a kind of exemplary embodiment of the disclosure, the correction parameter of the grayscale is that the corresponding gamma of the grayscale is posted
Storage parameter.
In a kind of exemplary embodiment of the disclosure, the gamma correction method further include:
The target gamma parameter is exported to a gamma register.
According to the second aspect of the disclosure, a kind of gamma correcting device is provided, comprising:
With reference to gamma curve unit, gamma curve is referred to for obtaining, the maximum brightness with reference to gamma curve is to set
Determine brightness；
With reference to gamma parameters unit, gamma parameter is referred to for obtaining, the gamma parameter that refers to includes described with reference to gal
The correction parameter of each grayscale of horse curve；
Target maximum brightness unit, for obtaining target maximum brightness, the target maximum brightness is not more than the setting
Brightness；
Target gamma curve unit, for obtaining target gamma curve according to the target maximum brightness；
Target gamma parameters unit, according to target gamma curve, with reference to gamma curve and with reference to gamma parameter, acquisition target
Gamma parameter, the target gamma parameter include the correction parameter of each grayscale of the target gamma curve.
In a kind of exemplary embodiment of the disclosure, the gamma correcting device further include:
Output unit, for exporting the target gamma parameter.
In terms of according to the third of the disclosure, a kind of electronic equipment having a display function is provided, which is characterized in that including
The driving unit of above-mentioned gamma correcting device, display panel and the display panel；The wherein driving of the display panel
Unit includes:
First gamma register, it is described with reference to gamma parameter for storing, and can be exported described with reference to gamma parameter
To the gamma correcting device；
Second gamma register, it is described for receiving and storing the target gamma parameter from the gamma correcting device
Target gamma parameter can make the maximum brightness of the display panel be target maximum brightness.
Gamma correction method, gamma correcting device and the electronic equipment having a display function that the disclosure provides, in a brush
It only needs to obtain under new frame per second corresponding with reference to gamma parameter with reference to gamma curve, so that it may obtain mesh according to target maximum brightness
The corresponding target gamma parameter of maximum brightness is marked, without the gamma parameter being obtained ahead of time under multiple and different maximum brightness.This makes
Display device only can carry out gamma correction according to setting brightness and obtain with reference to gamma parameter, without under multiple and different brightness
Gamma correction is carried out respectively, be can reduce the time that display device carries out gamma correction, is capable of increasing the production capacity of display device.And
And this makes the IC of display device be not required to setting multiple groups gamma register to store multiple groups gamma register parameter, can reduce
The size of IC reduces the cost of display device.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It is more obvious.
Fig. 1 is the flow diagram of the gamma correction method of disclosure embodiment.
Fig. 2 is the schematic diagram of the acquisition target gamma parameter of disclosure embodiment.
Fig. 3 is the structural schematic diagram of the electronic equipment having a display function of disclosure embodiment.
Main element description of symbols includes: in figure
100, gamma correcting device；110, high temperature furnace cradle；120, with reference to gamma parameters unit；130, target maximum brightness
Unit；140, target gamma curve unit；150, target gamma parameters unit；160, output unit；200, the drive of display panel
Moving cell；210, the first gamma register；220, the second gamma register；230, driving circuit；300, display panel；400, bright
Degree adjusts component.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can be incorporated in any suitable manner in one or more embodiments.In the following description, many details are provided
Embodiment of the disclosure is fully understood to provide.
When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or refer to certain
Structure is " direct " to be arranged in other structures, or refers to that certain structure is arranged in other structures by the way that another structure is " indirect ".
Term "one", " one ", " described " to indicate there are one or more elements/component part/etc.；Term " packet
Include " and " having " to indicate the open meaning being included and refer to that the element/component part/in addition to listing waits it
Outside also may be present other element/component part/etc..Term " first " and " second " etc. are only used as label, are not to it
The quantity of object limits.
In the related technology, the mode that the different gammas modulation of IC (integrated circuit) carries out is also different, and mainstream is simulation at present
Gamma modulation, needs to carry out multiple groups gamma correction, wherein one group of gamma correction refers to carrying out gal under a maximum brightness
Horse corrects to obtain gamma register parameter corresponding to the maximum brightness.It for example, can be under different maximum brightness
Gamma correction is carried out, the gamma register parameter under corresponding maximum brightness is obtained, so that the display device is deposited using the gamma
Device parameter realizes gamma modulation (so that its grayscale and brightness meet gamma curve requirement) under corresponding maximum brightness；Remaining is most
Gamma curve and its corresponding gamma register parameter under big brightness, can according to corrected gamma register parameter and
Its corresponding gamma curve is fitted and obtains.If only carrying out gamma correction under a maximum brightness, other most
The bound deviation being fitted in the case of big brightness is too big, and the result of gamma modulation is carried out using the gamma register parameter after fitting
It can offset criteria gamma curve.
But as the differentiation of electronic equipment having a display function designs, the frequency of more and more electronic equipments is
60Hz is not limited to devise.For example, the mobile phone having on the market at present refreshes frame per second and has reached 90Hz or 120Hz.It is false
If mobile phone needs to carry out four groups of gamma corrections under a refreshing frame per second, then the mobile phone in order to realize 60Hz, 90Hz and
Tri- kinds of refreshing frame per second of 120Hz, then need to carry out 12 groups of gamma corrections, that is, need to obtain 12 groups of gamma register parameters, correspondingly,
IC needs 12 groups of gamma registers at least to store this 12 groups of gamma register parameters.The gamma correction of such multiple groups will be so that aobvious
The pitch time of showing device extends, and increases the cost of display device and reduces the production capacity of display device.The gamma of such multiple groups is posted
Storage will greatly increase IC area, increase the cost of display device.
A kind of gamma correction method is provided in disclosure embodiment, for obtaining display device in target maximum brightness
Lgoal(max) the target gamma parameter D undergoal.As shown in Figure 1, the gamma correction method includes:
Step S110 is obtained and is referred to gamma curve Lineref, with reference to gamma curve LinerefMaximum brightness be set it is bright
Spend Lref(max)；
Step S120 is obtained and is referred to gamma parameter Dref, with reference to gamma parameter DrefEach ash including reference gamma curve
Rank GrefCorrection parameter；
Step S130 obtains target maximum brightness Lgoal(max), target maximum brightness Lgoal(max) no more than setting brightness
Lref(max)；
Step S140, according to target maximum brightness Lgoal(max), target gamma curve Line is obtainedgoal；
Step S150, according to target gamma curve Linegoal, with reference to gamma curve LinerefWith reference gamma parameter Dref,
Obtain target gamma parameter Dgoal, target gamma parameter DgoalEach grayscale G including target gamma curvegoalCorrection parameter.
The gamma correction method that the disclosure provides only needs to obtain with reference to gamma curve Line under a refreshing frame per secondrefIt is right
The reference gamma parameter D answeredref, so that it may according to target maximum brightness Lgoal(max) target maximum brightness L is obtainedgoal(max) right
The target gamma parameter D answeredgoal, without the gamma parameter being obtained ahead of time under multiple and different maximum brightness.This makes display device
It can be only according to setting brightness Lref(max) it carries out gamma correction and obtains with reference to gamma parameter Dref, without multiple and different bright
Gamma correction is carried out under degree respectively, the time that display device carries out gamma correction is can reduce, is capable of increasing the production of display device
Energy.Moreover, this makes the IC of display device be not required to setting multiple groups gamma register to store multiple groups gamma parameter, IC can be reduced
Size, reduce the cost of display device.
Each step of the gamma correction method provided with reference to the accompanying drawing disclosure embodiment is described in detail:
In step s 110, this refers to gamma curve LinerefIt can be obtained by the method for calculating or directly reading.
In one embodiment, it can obtain by the following method with reference to gamma curve Lineref:
Step S210 obtains a standard gamma curve Linestd；
Step S220 obtains setting brightness Lref(max)；
Step S230, according to standard gamma curve LinestdWith setting brightness Lref(max) it obtains and refers to gamma curve
Lineref。
In step S210, standard gamma curve LinestdGamma index can be 2.0~2.4, such as can be 2.2.
Standard gamma curve LinestdGamma index be subject to the technology that can satisfy design requirement, such as meet specific application scene
Demand meets the needs of client specifies etc., and the disclosure does not do special restriction to this.It is understood that standard gamma is bent
Line LinestdWith standard maximum brightness Lstd(max), as standard maximum brightness Lstd(max) when changing, standard gamma curve
LinestdAlso can change accordingly, but its gamma index is constant.
In one embodiment, it can be read directly or receive a standard gamma curve Linestd, that is, directly obtain mark
Each grayscale G of quasi- gamma curvestdAnd with each grayscale GstdCorresponding brightness Lstd.In another embodiment, available
Then gamma index calculates each grayscale G according to the gamma indexstdCorresponding brightness Lstd。
In step S220, brightness L is setrefIt (max) can be no more than the pole for the brightness that display device can be shown
Limit, is display device required maximum brightness value to be shown in application scenario.For example, display device itself can be shown
The limiting value for the brightness shown is Lmax；In use, by the control of driving circuit, so that display device can be shown
Brightness in a setting range, such as display device can be shown brightness range be 0~Lref(max), Lref
(max)≤Lmax, the then LrefIt (max) is setting brightness.Setting brightness Lref(max) it can be performance according to display device
And demand of the intended application scene to maximum display brightness and determination, the disclosure does not do special restriction to this.
It, can be according to setting brightness L in step S230ref(max) and standard maximum brightness Lstd(max) ratio, really
Fixed first fitting coefficient f1, then using the first fitting coefficient f1 to each grayscale G of standard gamma curvestdIt is corresponding bright
Spend LstdIt compensates, obtains and refer to gamma curve Lineref。
For example, in one embodiment, setting brightness L can be calculatedref(max) with standard maximum brightness Lstd
(max) ratio and obtain the first fitting coefficient f1, it may be assumed that f1=Lref(max)/Lstd(max).Then, each ginseng is successively calculated
Examine the grayscale G of gamma curverefThe corresponding brightness L with reference to gamma curveref.Wherein, the reference gamma that grayscale value is i is being calculated
The grayscale G of curveref(i) the corresponding brightness L with reference to gamma curveref(i) when, Lref(i)=f1*Lstd(i), LstdIt (i) is ash
Rank value is the grayscale G of the standard gamma curve of istd(i) the corresponding brightness with reference to gamma curve.
In one embodiment, standard gamma curve Line is being obtainedstdWhen, the standard of standard gamma curve can be made
Maximum brightness LstdIt (max) is setting brightness Lref(max), then the first fitting coefficient f1 is equal to 1, the standard gamma curve
LinestdAs refer to gamma curve Lineref。
In the step s 120, it can be obtained from a storage device and refer to gamma parameter Dref.For example, display device
It may include the first gamma register, the first gamma register can be used for storing this with reference to gamma parameter Dref。
In one embodiment, which is OLED (Organic Light Emitting Diode) device, in the case where one refreshes frame per second
It can be only according to setting brightness Lref(max) gamma correction is carried out, and gamma parameter D will be referred torefThe first gamma register is written
In.It, can be by under each refreshing frame per second if the display device is designed to work under different refreshing frame per second
According to setting brightness Lref(max) it carries out gamma correction and obtains with reference to gamma parameter Dref。
In step s 130, it can receive an externally input target maximum brightness Lgoal(max).For example, a tool
There is the electronic equipment of display function to can have a brightness regulation component, which can export target maximum brightness
Lgoal(max) to electronic equipment, the maximum display brightness for adjusting display device is target maximum brightness Lgoal(max).This is bright
Degree, which adjusts component, to be button, knob etc., or virtual push button, knob on a touch device, brightness regulation
Item etc., the disclosure do not do special restriction to this.
It, can be according to standard gamma curve Line in step S140stdOr refer to gamma curve LinerefAnd target is maximum
Brightness Lgoal(max) target gamma curve Line is obtainedgoal, the disclosure do not do special restriction to this.
For example, according to standard gamma curve LinestdWith target maximum brightness Lgoal(max) target gamma is obtained
Curve LinegoalWhen, it can first calculate target maximum brightness Lgoal(max) with standard maximum brightness Lstd(max) ratio and obtain
Obtain the second fitting coefficient f2, it may be assumed that f2=Lgoal(max)/Lstd(max).Then, the ash of each target gamma curve is successively calculated
Rank GgoalCorresponding brightness Lgoal.Wherein, in the grayscale G for calculating the target gamma curve that grayscale value is igoal(i) corresponding reference
The brightness L of gamma curvegoal(i) when, Lgoal(i)=f1*Lstd(i), Lstd(i) be the standard gamma curve that grayscale value is i ash
Rank Gstd(i) the corresponding brightness with reference to gamma curve.
In step S150, target gamma parameter D can be determined by the following methodgoal:
Step S310, according to target gamma curve LinegoalWith reference gamma curve Lineref, establish target mapping and close
System, target mapping relations are each grayscale G of target gamma curvegoalWith the grayscale G of reference gamma curverefBetween mapping
Relationship；
Step S320 according to target mapping relations and refers to gamma parameter DrefObtain each grayscale of target gamma curve
GgoalCorrection parameter Dgoal。
Wherein, in step s310, each grayscale G of available target gamma curvegoal；Obtain either objective gamma
The grayscale G of curvegoalAfterwards, the grayscale G of target gamma curve is obtainedgoalBrightness L on target gamma curvegoal, obtain brightness
LgoalGrayscale G on reference gamma curveref。
For example, the grayscale D of target gamma curve can be successively obtained according to preset sequenceref.When obtaining a grayscale
Value is the grayscale G of the target gamma curve of igoal(i) after, according to target gamma curve LinegoalCalculate corresponding target gamma
The brightness value L of curvegoalIt (i) is Lm；Then in reference gamma curve LinerefOn find brightness Lref(j), wherein brightness
Lref(j) it is Lm or is the brightness closest to Lm；In reference gamma curve LinerefOn find brightness Lref(j) corresponding ginseng
Examine the grayscale G of gamma curveref(j), Gref(j) grayscale value is j.In this way, the grayscale G of target gamma curvegoal(i) it and refers to
The grayscale G of gamma curveref(j) corresponding, as one group of mapping in target mapping relations.In this way, traversal target gamma curve
Each grayscale Ggoal, each grayscale G of target gamma curve is found respectivelygoalThe corresponding grayscale on reference gamma curve
Gref, and corresponding mapping is formed, obtain target mapping relations.
In one embodiment, which can be the first mapping table (map), include more in the first mapping table
A key/value pair for searching corresponding key/value pair according to target bond parameter, and then obtains target value parameter.Wherein bond parameter is
The grayscale G of target gamma curvegoal, value parameter is the grayscale G with reference to gamma curveref；Wherein, bond parameter set includes target
Gamma curve LinestdAll grayscale values.
Step S320, can be according to target mapping relations, to each grayscale G of target gamma curvegoalCorrection parameter
Assignment is carried out, and then obtains target gamma parameter Dgoal。
For example, as shown in Fig. 2, DgoalIt (i) is the grayscale G of target gamma curvegoal(i) correction parameter, Dref(j)
For the grayscale G with reference to gamma curveref(j) correction parameter, due to the grayscale D of target gamma curvegoal(i) and with reference to gamma
The grayscale G of curveref(j) it is corresponded to each other according to target mapping relations, then makes Dgoal(i)=Dref(j)。
The correction parameter of grayscale can be the corresponding gamma register parameter of grayscale.It is understood that according to different
Maximum display brightness, display device carry out gamma modulation, gamma applied by each gamma curve according to different gamma curves
Register parameters are not also identical.
In one embodiment, gamma correction method can also include output target gamma parameter DgoalIt is posted to the second gamma
Storage.In this way, the driving circuit of display device, which can use the value in second gamma register, carries out gamma to display device
Modulation, so that the grayscale of display device and display brightness meet target gamma curve LinegoalRequirement, and in maximum gray
Brightness be target maximum brightness Lgoal(max)。
It should be noted that although describing each step of method in the disclosure in the accompanying drawings with particular order,
This does not require that or implies must execute these steps in this particular order, or have to carry out step shown in whole
Just it is able to achieve desired result.Additional or alternative, it is convenient to omit multiple steps are merged into a step and held by certain steps
Row, and/or a step is decomposed into execution of multiple steps etc., it is regarded as a part of this disclosure.
The disclosure also provides a kind of gamma correcting device 100, for obtaining display device in target maximum brightness Lgoal
(max) the target gamma parameter D undergoal.As shown in figure 3, the gamma correcting device 100 include with reference to gamma curve unit 110,
With reference to gamma parameters unit 120, target maximum brightness unit 130, target gamma curve unit 140 and target gamma parameters unit
150, wherein
Gamma curve Line is referred to for obtaining with reference to gamma curve unit 110ref, with reference to gamma curve LinerefMost
Big brightness is setting brightness Lref(max)；It is obtained with reference to gamma parameters unit 120 and refers to gamma parameter Dref, with reference to gamma parameter
DrefEach grayscale G including reference gamma curverefCorrection parameter；Target maximum brightness unit 130 is for obtaining target most
Big brightness Lgoal(max), target maximum brightness Lgoal(max) no more than setting brightness Lref(max)；Target gamma curve unit
140 for obtaining target gamma curve according to target maximum brightness；Target gamma parameters unit 150 is used for bent according to target gamma
Line Linegoal, with reference to gamma curve LinerefWith reference gamma parameter Dref, obtain target gamma parameter Dgoal, target gamma ginseng
Number DgoalEach grayscale G including target gamma curvegoalCorrection parameter.
The detail, working principle and corresponding technical effect of each unit of above-mentioned gamma correcting device 100 are
It is described in detail in corresponding gamma correction method, therefore details are not described herein again.
In one embodiment, above-mentioned each unit can be the circuit or device that can be realized corresponding function, for a collection
At the circuit of the different piece on circuit.For example, which can be set the driving IC in display device
On.
In another embodiment, which can be CPU (central processing unit), MCU (microcontroller list
Member) and PLC (programmable logic controller (PLC)) in one, or be the part of CPU, MCU or PLC.For example, the gamma school
Equipment 100 can be the processor or part of it of a smart machine having a display function.
In one embodiment, gamma correcting device 100 can also include output unit 160, for exporting target gamma
Parameter is to a gamma register.
It should be noted that although being referred to several modules or unit of gamma correcting device 100 in the above detailed description,
But it is this divide it is not enforceable.In fact, according to disclosure embodiment, two or more above-described modules or
The feature and function of person's unit can embody in a module or unit.Conversely, an above-described module or
The feature and function of unit can be to be embodied by multiple modules or unit with further division.
The disclosure also provides a kind of electronic equipment having a display function, as shown in figure 3, the electronic equipment includes above-mentioned gal
Gamma correcting device 100 and display device described in horse means for correcting embodiment, the display device include display panel
300 and display panel driving unit 200；Wherein the driving unit 200 of display panel includes 210 He of the first gamma register
Second gamma register 220；First gamma register 210 refers to gamma parameter D for storingref, and can will join with reference to gamma
Number DrefIt exports to the reference gamma parameters unit 120 of gamma correcting device 100；Second gamma register 220 is used for from gamma school
Equipment 100 receives and stores target gamma parameter Dgoal, the target gamma parameter DgoalIt can make the display panel 300
Maximum brightness be target maximum brightness Lgoal(max)。
It is understood that the driving unit 200 of display panel has driving circuit 230, driving circuit can be according to mesh
Mark gamma parameter DgoalDisplay panel 300 is driven, so that the maximum brightness of display panel 300 is target maximum brightness Lgoal
(max)。
The electronic equipment having a display function can be smart phone, smartwatch, laptop or television set
Deng.Described by the gamma correcting device 100 of the electronic equipment having a display function and above-mentioned gamma correcting device embodiment
Gamma correcting device 100 it is identical, therefore beneficial effect having the same therefore details are not described herein again.
In one embodiment, which further includes a brightness regulation component, is used for gal
Horse means for correcting 100 inputs target maximum brightness Lgoal(max)。
It should be appreciated that the disclosure is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The disclosure can have other embodiments, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of this disclosure.It should be appreciated that this disclosure and the disclosure of restriction extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the disclosure.The embodiment of this specification illustrates to become known for realizing the disclosure most
Good mode, and those skilled in the art will be enable to utilize the disclosure.
Claims (10)
1. a kind of gamma correction method characterized by comprising
It obtains and refers to gamma curve, the maximum brightness with reference to gamma curve is setting brightness；
It obtains and refers to gamma parameter, it is described to join with reference to the correction that gamma parameter includes each grayscale with reference to gamma curve
Number；
Target maximum brightness is obtained, the target maximum brightness is not more than the setting brightness；
According to the target maximum brightness, target gamma curve is obtained；
According to the target gamma curve, the reference gamma curve and the reference gamma parameter, target gamma parameter is obtained,
The target gamma parameter includes the correction parameter of each grayscale of the target gamma curve.
2. gamma correction method according to claim 1, which is characterized in that obtain and with reference to gamma curve include:
Obtain a standard gamma curve；
Obtain the setting brightness；
Gamma curve is referred to according to the standard gamma curve and the setting luminance acquisition.
3. gamma correction method according to claim 2, which is characterized in that according to the target maximum brightness, obtain mesh
Marking gamma curve includes:
The target gamma is obtained according to the standard gamma curve or the reference gamma curve and the target maximum brightness
Curve.
4. gamma correction method according to claim 1, which is characterized in that according to target gamma curve, with reference to gamma song
Line and reference gamma parameter, obtaining target gamma parameter includes:
According to the target gamma curve and it is described refer to gamma curve, establish target mapping relations, the target mapping relations
For the mapping relations between each grayscale and the grayscale with reference to gamma curve of the target gamma curve；
According to the school of the target mapping relations and each grayscale for obtaining the target gamma curve with reference to gamma parameter
Positive parameter.
5. gamma correction method according to claim 4, which is characterized in that according to the target gamma curve and the ginseng
Gamma curve is examined, establishing target mapping relations includes:
Obtain each grayscale of the target gamma curve；
After the grayscale for obtaining any target gamma curve, the grayscale of the target gamma curve is obtained in the target gamma
Brightness on curve obtains the brightness in the grayscale with reference on gamma curve.
6. gamma correction method according to claim 1, which is characterized in that the correction parameter of the grayscale is the grayscale
Corresponding gamma register parameter.
7. gamma correction method according to claim 1, which is characterized in that the gamma correction method further include:
The target gamma parameter is exported to a gamma register.
8. a kind of gamma correcting device characterized by comprising
With reference to gamma curve unit, gamma curve is referred to for obtaining, the maximum brightness with reference to gamma curve is that setting is bright
Degree；
With reference to gamma parameters unit, gamma parameter is referred to for obtaining, the gamma parameter that refers to includes described bent with reference to gamma
The correction parameter of each grayscale of line；
Target maximum brightness unit, for obtaining target maximum brightness, the target maximum brightness is not more than the setting brightness；
Target gamma curve unit, for obtaining target gamma curve according to the target maximum brightness；
Target gamma parameters unit, according to target gamma curve, with reference to gamma curve and with reference to gamma parameter, acquisition target gamma
Parameter, the target gamma parameter include the correction parameter of each grayscale of the target gamma curve.
9. gamma correcting device according to claim 8, which is characterized in that the gamma correcting device further include:
Output unit, for exporting the target gamma parameter.
10. a kind of electronic equipment having a display function, which is characterized in that including the described in any item gammas of claim 8~9
The driving unit of means for correcting, display panel and the display panel；Wherein the driving unit of the display panel includes:
First gamma register, it is described with reference to gamma parameter for storing, and can be exported described with reference to gamma parameter to institute
State gamma correcting device；
Second gamma register, for receiving and storing the target gamma parameter, the target from the gamma correcting device
Gamma parameter can make the maximum brightness of the display panel be target maximum brightness.
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