CN105895051A - Screen brightness adjustment method and device - Google Patents

Abstract

The invention provides a screen brightness adjustment method and device. The method comprises the steps that an input gamma curve adjustment instruction is received; based on a gamma algorithm principle and according to a locally pre-stored standard gamma curve and the gamma curve index, a gamma array corresponding to the gamma curve index is calculated; and the screen brightness is adjusted from the current brightness to the brightness corresponding to the calculated gamma array. According to the technical scheme provided by the invention, according to the standard gamma curve, the gamma array of the user-specified gamma curve index is calculated; according to the calculated gamma array, the screen brightness is adjusted, and the screen brightness is dynamically adjusted; only a group of standard gamma curve and the array thereof are saved in a terminal; saving multiple gamma curve arrays is not needed; and the storage space of the terminal is saved.

Description

A kind of screen brightness regulation method and device

Technical field

The present embodiments relate to technical field of image processing, particularly relate to a kind of screen brightness regulation method and Device.

Background technology

Along with the development of the Internet, various terminals (such as mobile phone, pad etc.) are convenient with its communication, operation side Just characteristic is widely used.At present, terminal can have independent operating system, and user is permissible The application software that the third party service provider provides is installed the most voluntarily, by this type of application software, Ke Yikuo The function of exhibition terminal.

Under normal circumstances, various terminals are provided with screen, are used for presenting user interface；LCD screen brightness Height correction can be adjusted by gamma and realize, and so-called gamma adjusts i.e. finger to gamma Number is adjusted, the gamma that different exponent pair should be different.

Traditional LCD screen terminal only preserves the gamma that an exponent pair is answered, any viewing field Scape is all to call this gamma, the linear luminance that output is fixing, it is impossible to in user preferences, video Hold and viewing scene carries out random adjustment.Such as, by day or time sales field carries out product introduction, due to room Interior brightness is higher, needs the brightness promoting screen to reach higher lightness, bright degree, thus improves screen The quality of the video pictures that curtain is presented；It is usually in the environment of dim when watching film, in order to simulate Movie theatre scene, and reach the comfort level of eyes perception, need the brightness reducing major part bright scene to avoid Dazzling.

But, the mode only preserving one group of brightness gamma of adjustment in traditional liquid crystal screen terminal is not The demand of luminance dynamic adjustment can be met.Therefore, at present, when on-screen displays, exist and cannot move The problem that state adjusts screen intensity.

Summary of the invention

The embodiment of the present invention provides a kind of screen brightness regulation method and device, aobvious at screen at present in order to solve When showing picture, there is the problem that cannot dynamically adjust screen intensity.

The concrete technical scheme that the embodiment of the present invention provides is as follows:

The embodiment of the present invention provides a kind of screen brightness regulation method, including:

The gamma receiving input adjusts instruction；Wherein, wrap during described gamma adjusts instruction Containing gamma index；

Based on gamma algorithm principle, the standard gamma prestored according to this locality, and described gamma Exponent, calculates the gamma array that described gamma exponent pair is answered；

Screen intensity is adjusted to brightness corresponding to calculated gamma array by present intensity.

The embodiment of the present invention provides a kind of screen intensity adjusting apparatus, including:

Instruction reception unit, adjusts instruction for receiving the gamma of input；Wherein, described gamma Curve adjusts in instruction and comprises gamma index；

Computing unit, for based on gamma algorithm principle, the standard gamma prestored according to this locality, And described gamma index, calculate the gamma array that described gamma exponent pair is answered；

Brightness adjustment unit, for being adjusted screen intensity to calculated gamma number by present intensity The brightness that group is corresponding.

The embodiment of the present invention provides a kind of screen brightness regulation method and device, the gamma inputted by reception Curve adjusts instruction；Wherein, described gamma comprises gamma index in adjusting instruction；Base Bent in gamma algorithm principle, the standard gamma prestored according to this locality, and described gamma Linear index, calculates the gamma array that described gamma exponent pair is answered；By screen intensity by the brightest Degree adjusts to brightness corresponding to calculated gamma array.Use embodiment of the present invention technical scheme, The gamma of the gamma index that user specifies according to standard gamma, can be calculated Array, thus according to calculated gamma array, screen intensity is adjusted, it is achieved thereby that Dynamic adjustment to screen intensity；Further, one group of standard gamma and number thereof are preserved the most in the terminal Organize, multiple gamma array need not be preserved, thus saved the memory space of terminal.

Accompanying drawing explanation

Fig. 1 is that in the embodiment of the present invention one, screen intensity adjusts flow chart；

Fig. 2 is screen intensity adjusting apparatus structural representation in the embodiment of the present invention two.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based in the present invention Embodiment, those of ordinary skill in the art obtained under not making creative work premise all its His embodiment, broadly falls into the scope of protection of the invention.

Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.

Embodiment one

Refering to shown in Fig. 1, in the embodiment of the present invention, when terminal starts first, carry out memory headroom cleaning Process, including:

Step 100: the gamma receiving input adjusts instruction；Wherein, described gamma is adjusted Whole instruction comprises gamma index.

In the embodiment of the present invention, terminal receives the gamma of input and adjusts instruction；Wherein, described It can be that user is directly inputted by the User Interface of described terminal that gamma adjusts instruction Gamma adjusts instruction, and under this kind of application scenarios, described terminal possesses User Interface, described User Interface comprises screen intensity and adjusts option, when terminal detects that user triggers described screen intensity When adjusting option, described terminal presents screen intensity and adjusts the page, and described screen intensity adjusts in the page and comprises Gamma adjusts option, and this gamma adjusts option can comprise multiple Index selection item；Institute State gamma adjustment instruction and can also send the instruction to described terminal for other equipment, should at this kind With under scene, described terminal possesses communication function, it is possible to communicate with other equipment.

Optionally, described terminal is intelligent television, personal computer, mobile phone, panel computer etc., described end The operating system loaded in end can be Windows operating system, Android operation system, or ios operation System.

Step 110: based on gamma algorithm principle, the standard gamma prestored according to this locality, with And described gamma index, calculate the gamma array that described gamma exponent pair is answered.

In the embodiment of the present invention, terminal uses gamma algorithm principle, standard gamma prestored according to this locality The array that curve is corresponding, and described gamma index, calculating described gamma exponent pair should Gamma array；Wherein, it is also preferred that the left described gamma exists one group of conventional accurate gamma Curve, the index of described standard gamma is 2.2.

Optionally, terminal obtains the standard gamma array that described standard gamma is corresponding；Wherein, Described standard gamma array comprises the tristimulus values of each GTG；For described standard gamma number The tristimulus values of each GTG comprised in group, is performed both by operating as follows；Obtain the brightness of this GTG, with And the tristimulus values of this GTG, calculate the characteristic parameter of this GTG；Obtain the tristimulus values of this GTG respectively with The ratio relation of the tristimulus values of this GTG comprised in the gamma array that described gamma is corresponding； According to described characteristic parameter, and described characteristic parameter, obtain the different colours of this GTG respectively with described The ratio of the different colours of this GTG that gamma is corresponding；By described standard gamma array with described Product between ratio, is defined as the gamma array that described gamma exponent pair is answered.

Concrete, the characteristic parameter of described each GTG meets equation below:

L_vi=a × i^γ+ b formula one

Wherein, L_viIt is the brightness of i for GTG；A and b is the characteristic parameter of GTG i, and this and b is by The brightness of high gray known and the brightness of minimum gray scale determine；γ is the index of standard gamma；0 ≤i≤255。

Optionally, in the gamma array that the tristimulus values of this GTG is corresponding with described gamma respectively The ratio relation of the tristimulus values of this GTG comprised meets below equation:

Formula two

Wherein, X_{I standard}, Y_{I standard}, Z_{I standard}Standard tristimulus values when being i for GTG；X_{I is current}, Y_{I is current}, Z_{I is current}For GTG is the tristimulus values that the described gamma of i is corresponding；L_{Vi standard}It is the normal brightness of i for GTG；L_{Vi is current} For the brightness to be adjusted that GTG is i；α_{Ri standard}The redness that when being i for GTG, standard gamma is corresponding Weight coefficient；α_{Gi standard}The green weight coefficient that when being i for GTG, standard gamma is corresponding；α_{Bi standard}For The blue weight coefficient that when GTG is i, standard gamma is corresponding；α_{Ri is current}Described in when being i for GTG The red weight coefficient that gamma is corresponding；α_{Gi is current}When being i for GTG, described gamma is corresponding Green weight coefficient；α_{Bi is current}The blue weight system that when being i for GTG, described gamma is corresponding Number.

Concrete, described X_{I standard}, Y_{I standard}, Z_{I standard}And X_{I is current}, Y_{I is current}, Z_{I is current}All can be according to colorimetry meter Calculation formula obtains:

$\left[\begin{array}{c}{X}_i\\ Y_i\\ Z_i\end{array}\right]=\left[\begin{array}{c}{X}_{R255},X_{G255},X_{B255}\\ Y_{R255},Y_{G255},Y_{B255}\\ Z_{R255},Z_{G255},Z_{B255}\end{array}\right]\left[\begin{array}{c}{\mathrm{\α}}_{Ri}\\ {\mathrm{\α}}_{Gi}\\ {\mathrm{\α}}_{Bi}\end{array}\right]$ Formula three

Wherein, X_i, Y_i, Z_iFor when under standard colorimetric system (CIE1931-XYZ) standard, GTG is i Tristimulus values；X_R255, Y_R255, Z_R255Redness tristimulus values when being 255 for GTG；X_G255, Y_G255, Z_G255 Green tristimulus values when being 255 for GTG；X_B255, Y_B255, Z_B255Blueness tristimulus when being 255 for GTG Value；α_RiThe red weight coefficient that when being i for GTG, gamma is corresponding；α_GiWhen being i for GTG The red weight coefficient that gamma is corresponding；α_BiThe redness that when being i for GTG, gamma is corresponding Weight coefficient；In standard colorimetric system, three kinds of colors of each GTG are (red, green and blue Color) respectively with one group of α of numerical value_Ri、α_Gi、α_BiCorresponding.

Further, according to CIE1931-XYZ and CIE 1931-xyL_vUnderstand, under each GTG described three Under stimulus value and this GTG, transformational relation between brightness meets equation below:

$\left\{\begin{array}{c}X=\frac{x_0}{y_0}\×L_V\\ Y=L_V\\ Z=\frac{1-x_0-y_0}{y_0}\×L_V\end{array}\right.$ Formula four

Wherein, X, Y and Z are tristimulus values；L_vFor brightness；x₀And y₀For colour temperature.

Optionally, in the case of the colour temperature of each GTG is fixing, standard gamma under each GTG Equation below is met with described gamma tristimulus values:

Formula five

Wherein, X_{I standard}, Y_{I standard}, Z_{I standard}Standard tristimulus values when being i for GTG；X_{I is current}, Y_{I is current}, Z_{I is current}For The GTG tristimulus values that when being i, described gamma is corresponding；L_{Vi standard}It is the normal brightness of i for GTG；L_{Vi is current} For the brightness to be adjusted that GTG is i；α_{Ri standard}The redness that when being i for GTG, standard gamma is corresponding Weight coefficient；α_{Gi standard}The green weight coefficient that when being i for GTG, standard gamma is corresponding；α_{Bi standard}For The blue weight coefficient that when GTG is i, standard gamma is corresponding；α_{Ri is current}Described in when being i for GTG The red weight coefficient that gamma is corresponding；α_{Gi is current}When being i for GTG, described gamma is corresponding Green weight coefficient；α_{Bi is current}The blue weight system that when being i for GTG, described gamma is corresponding Number.

Optionally, this GTG that the different colours of each GTG is corresponding with described gamma respectively The ratio of different colours meets equation below:

Formula six

Wherein, α_{γ i standard}For the weight system that GTG is any one color that standard gamma during i is corresponding Number；α_{γ i is current}The weight coefficient of any one color that described gamma is corresponding when being i for GTG；L_viHFor High gray (i=255) brightness；L_viLFor minimum gray scale (i=0) brightness；γ_StandardStandard when being i for GTG Gamma index；γ_CurrentlyDescribed gamma index when being i for GTG.

Further, described terminal is by array corresponding for gamma that described index is 2.2 and described public affairs Formula six is multiplied, and the gamma array obtained after being multiplied is defined as the array that described gamma is corresponding.

Use technique scheme, by being the gamma of 2.2 by the most highly developed index accurately As standard gamma, use the ultimate principle of colorimetry, keep 256 GTGs according to described Gamma gauge index is that other gamma (if 8bit) each gray scale of arbitrary value is put down in vain Weighing apparatus or chromaticity coordinates constant on the premise of, keep the feelings that the brightness of minimum gray scale and high gray is basically unchanged simultaneously Under condition, according to the array that standard gamma is corresponding, derive merely through numerical value, can calculate and arbitrarily refer to The gamma array of numerical value, need not take system space, and the gamma array of the arbitrary characteristics value obtained Accuracy is high.

Step 120: screen intensity is adjusted to corresponding bright of calculated gamma array by present intensity Degree.

In the embodiment of the present invention, screen brightness value is adjusted by terminal according to described gamma array, suitable For various users, and the demand that different application scene is to screen intensity.

Further, each number comprised in the gamma array that described gamma exponent pair is answered is calculated After value, described terminal will be wrapped in the gamma data of calculated gamma index and correspondence thereof Each data contained store, in order to when subsequent user chooses this gamma index again, terminal energy Call rapidly this gamma array, without double counting, decrease the burden that terminal calculates, saved and be System resource.

Using technique scheme, terminal can be calculated user specify according to standard gamma The gamma array of gamma index, thus according to calculated gamma array, to screen Curtain brightness is adjusted, it is achieved thereby that the dynamic adjustment to screen intensity；Further, preserve the most in the terminal One group of standard gamma and array thereof, need not preserve multiple gamma array, thus save The about memory space of terminal.

Embodiment two

Refering to shown in Fig. 2, in the embodiment of the present invention, it is provided that a kind of screen intensity adjusting apparatus, including instruction Reception unit 20, computing unit 21, and brightness adjustment unit 22, wherein:

Instruction reception unit 20, adjusts instruction for receiving the gamma of input；Wherein, described Gamma adjusts in instruction and comprises gamma index；

Computing unit 21, for based on gamma algorithm principle, bent according to standard gamma that this locality prestores Line, and described gamma index, calculate the gamma number that described gamma exponent pair is answered Group；

Brightness adjustment unit 22, for being adjusted screen intensity to calculated gamma by present intensity The brightness that array is corresponding.

Described computing unit 21, specifically for: obtain the standard that described standard gamma is corresponding Gamma array；Wherein, described standard gamma array comprises the tristimulus values of each GTG；Pin Tristimulus values to each GTG comprised in described standard gamma array, is performed both by operating as follows； Obtain the brightness of this GTG, and the tristimulus values of this GTG, calculate the characteristic parameter of this GTG；Obtaining should This GTG comprised in the gamma array that the tristimulus values of GTG is corresponding with described gamma respectively The ratio relation of tristimulus values；According to described characteristic parameter, and described characteristic parameter, obtain this GTG The ratio of the different colours of this GTG that different colours is corresponding with described gamma respectively；By described mark Product between quasi-gamma array and described ratio, is defined as what described gamma exponent pair was answered Gamma array.

The characteristic parameter of described each GTG meets equation below:

L_vi=a × i^γ+b

Wherein, L_viIt is the brightness of i for GTG；A and b is the characteristic parameter of GTG i；γ is standard gamma The index of curve；0≤i≤255.

The ratio relation of the tristimulus values that the tristimulus values of this GTG is corresponding with described gamma respectively is full Foot below equation:

Wherein, X_{I standard}, Y_{I standard}, Z_{I standard}Standard tristimulus values when being i for GTG；X_{I is current}, Y_{I is current}, Z_{I is current}For The GTG tristimulus values that when being i, described gamma is corresponding；L_{Vi standard}It is the normal brightness of i for GTG；L_{Vi is current} For the brightness to be adjusted that GTG is i；α_{Ri standard}The redness that when being i for GTG, standard gamma is corresponding Weight coefficient；α_{Gi standard}The green weight coefficient that when being i for GTG, standard gamma is corresponding；α_{Bi standard}For The blue weight coefficient that when GTG is i, standard gamma is corresponding；α_{Ri is current}Described in when being i for GTG The red weight coefficient that gamma is corresponding；α_{Gi is current}When being i for GTG, described gamma is corresponding Green weight coefficient；α_{Bi is current}The blue weight system that when being i for GTG, described gamma is corresponding Number.

The different colours of this GTG that the different colours of each GTG is corresponding with described gamma respectively Ratio meet equation below:

Wherein, α_{γ i standard}For the weight system that GTG is any one color that standard gamma during i is corresponding Number；α_{γ i is current}The weight coefficient of any one color that described gamma is corresponding when being i for GTG；L_viHFor High gray brightness；L_viLFor minimum gray scale brightness；γ_StandardStandard gamma index when being i for GTG； γ_CurrentlyDescribed gamma index when being i for GTG.

Described device also includes memory element 23, is used for: calculate what described gamma exponent pair was answered After each numerical value comprised in gamma array, by calculated gamma index and correspondence thereof Gamma data in each data of comprising store.

In sum, in the embodiment of the present invention, the gamma inputted by reception adjusts instruction；Its In, described gamma adjusts in instruction and comprises gamma index；Former based on gamma algorithm Reason, the standard gamma prestored according to this locality, and described gamma index, calculate described The gamma array that gamma exponent pair is answered；Screen intensity is adjusted to being calculated by present intensity Brightness corresponding to gamma array.Use embodiment of the present invention technical scheme, it is possible to according to standard gamma Curve, is calculated the gamma array of the gamma index that user specifies, thus according to calculating The gamma array arrived, is adjusted screen intensity, it is achieved thereby that the dynamic adjustment to screen intensity； Further, preserve one group of standard gamma and array thereof the most in the terminal, need not preserve multiple Gamma array, thus saved the memory space of terminal.

Device embodiment described above is only schematically, wherein said illustrates as separating component Unit can be or may not be physically separate, the parts shown as unit can be or May not be physical location, i.e. may be located at a place, or multiple network list can also be distributed to In unit.Some or all of module therein can be selected according to the actual needs to realize the present embodiment side The purpose of case.Those of ordinary skill in the art, in the case of not paying performing creative labour, i.e. can manage Solve and implement.

Through the above description of the embodiments, those skilled in the art is it can be understood that arrive each enforcement Mode can add the mode of required general hardware platform by software and realize, naturally it is also possible to by firmly Part.Based on such understanding, the portion that prior art is contributed by technique scheme the most in other words Dividing and can embody with the form of software product, this computer software product can be stored in computer can Read in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that one Computer equipment (can be personal computer, server, or the network equipment etc.) performs each embodiment Or the method described in some part of embodiment.

Last it is noted that above example is only in order to illustrate the technical scheme of the embodiment of the present invention, rather than It is limited；Although the embodiment of the present invention being described in detail with reference to previous embodiment, this area Those of ordinary skill is it is understood that the technical scheme described in foregoing embodiments still can be repaiied by it Change, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make phase The essence answering technical scheme departs from the spirit and scope of the embodiment of the present invention each embodiment technical scheme.

Claims (13)

1. a screen brightness regulation method, it is characterised in that including:

The gamma receiving input adjusts instruction；Wherein, wrap during described gamma adjusts instruction Containing gamma index；

Based on gamma algorithm principle, the standard gamma prestored according to this locality, and described gamma Exponent, calculates the gamma array that described gamma exponent pair is answered；

Screen intensity is adjusted to brightness corresponding to calculated gamma array by present intensity.

Method the most according to claim 1, it is characterised in that the finger of described standard gamma Number is 2.2.

Method the most according to claim 1 and 2, it is characterised in that based on gamma algorithm principle, The standard gamma prestored according to this locality, and described gamma index, calculate described gamma The gamma array that exponent is corresponding, specifically includes:

Obtain the standard gamma array that described standard gamma is corresponding；Wherein, described standard gamma Array comprises the tristimulus values of each GTG；

For the tristimulus values of each GTG comprised in described standard gamma array, it is performed both by as follows Operation；Obtain the brightness of this GTG, and the tristimulus values of this GTG, calculate the characteristic parameter of this GTG； Obtain the gamma array that the tristimulus values of this GTG is corresponding with described gamma respectively comprises should The ratio relation of the tristimulus values of GTG；According to described characteristic parameter, and described characteristic parameter, obtaining should The ratio of the different colours of this GTG that the different colours of GTG is corresponding with described gamma respectively；

By the product between described standard gamma array and described ratio, it is defined as described gamma The gamma array that exponent pair is answered.

Method the most according to claim 3, it is characterised in that the characteristic parameter of described each GTG Meet equation below:

L_vi=a × i^γ+b

Wherein, L_viIt is the brightness of i for GTG；A and b is the characteristic parameter of GTG i；γ is standard gamma The index of curve；0≤i≤255.

Method the most according to claim 3, it is characterised in that the tristimulus values of this GTG respectively with The ratio relation of the tristimulus values that described gamma is corresponding meets below equation:

Wherein, X_{I standard}, Y_{I standard}, Z_{I standard}Standard tristimulus values when being i for GTG；X_{I is current}, Y_{I is current}, Z_{I is current}For The GTG tristimulus values that when being i, described gamma is corresponding；L_{Vi standard}It is the normal brightness of i for GTG；L_{Vi is current} For the brightness to be adjusted that GTG is i；α_{Ri standard}The redness that when being i for GTG, standard gamma is corresponding Weight coefficient；α_{Gi standard}The green weight coefficient that when being i for GTG, standard gamma is corresponding；α_{Bi standard}For The blue weight coefficient that when GTG is i, standard gamma is corresponding；α_{Ri is current}Described in when being i for GTG The red weight coefficient that gamma is corresponding；α_{Gi is current}When being i for GTG, described gamma is corresponding Green weight coefficient；α_{Bi is current}The blue weight system that when being i for GTG, described gamma is corresponding Number.

Method the most according to claim 3, it is characterised in that the different colours of each GTG divides The ratio of the different colours of this most not corresponding with described gamma GTG meets equation below:

Wherein, α_{γ i standard}For the weight coefficient that GTG is any one color that standard gamma during i is corresponding； α_{γ i is current}The weight coefficient of any one color that described gamma is corresponding when being i for GTG；L_viHFor the highest Gray-scale intensity；L_viLFor minimum gray scale brightness；γ_StandardStandard gamma index when being i for GTG；γ_Currently Described gamma index when being i for GTG.

7. according to the method described in described claim 1, it is characterised in that calculate described gamma After each numerical value comprised in the gamma array that exponent pair is answered, described method also includes:

Each data that will comprise in the gamma data of calculated gamma index and correspondence thereof Store.

8. a screen intensity adjusting apparatus, it is characterised in that including:

Instruction reception unit, adjusts instruction for receiving the gamma of input；Wherein, described gamma Curve adjusts in instruction and comprises gamma index；

Computing unit, for based on gamma algorithm principle, the standard gamma prestored according to this locality, And described gamma index, calculate the gamma array that described gamma exponent pair is answered；

Brightness adjustment unit, for being adjusted screen intensity to calculated gamma number by present intensity The brightness that group is corresponding.

Device the most according to claim 8, it is characterised in that described computing unit, specifically for:

Obtain the standard gamma array that described standard gamma is corresponding；Wherein, described standard gamma Array comprises the tristimulus values of each GTG；

For the tristimulus values of each GTG comprised in described standard gamma array, it is performed both by as follows Operation；Obtain the brightness of this GTG, and the tristimulus values of this GTG, calculate the characteristic parameter of this GTG； Obtain the gamma array that the tristimulus values of this GTG is corresponding with described gamma respectively comprises should The ratio relation of the tristimulus values of GTG；According to described characteristic parameter, and described characteristic parameter, obtaining should The ratio of the different colours of this GTG that the different colours of GTG is corresponding with described gamma respectively；

By the product between described standard gamma array and described ratio, it is defined as described gamma The gamma array that exponent pair is answered.

Device the most according to claim 9, it is characterised in that the feature ginseng of described each GTG Count and meet equation below:

L_vi=a × i^γ+b

Wherein, L_viIt is the brightness of i for GTG；A and b is the characteristic parameter of GTG i；γ is standard gamma The index of curve；0≤i≤255.

11. devices according to claim 9, it is characterised in that the tristimulus values of this GTG respectively with The ratio relation of the tristimulus values that described gamma is corresponding meets below equation:

Wherein, X_{I standard}, Y_{I standard}, Z_{I standard}Standard tristimulus values when being i for GTG；X_{I is current}, Y_{I is current}, Z_{I is current}For The GTG tristimulus values that when being i, described gamma is corresponding；L_{Vi standard}It is the normal brightness of i for GTG；L_{Vi is current} For the brightness to be adjusted that GTG is i；α_{Ri standard}The redness that when being i for GTG, standard gamma is corresponding Weight coefficient；α_{Gi standard}The green weight coefficient that when being i for GTG, standard gamma is corresponding；α_{Bi standard}For The blue weight coefficient that when GTG is i, standard gamma is corresponding；α_{Ri is current}Described in when being i for GTG The red weight coefficient that gamma is corresponding；α_{Gi is current}When being i for GTG, described gamma is corresponding Green weight coefficient；α_{Bi is current}The blue weight system that when being i for GTG, described gamma is corresponding Number.

12. devices according to claim 9, it is characterised in that described computing unit is calculated The ratio of the different colours of this GTG that the different colours of each GTG is corresponding with described gamma respectively Value meets equation below:

Wherein, α_{γ i standard}For the weight system that GTG is any one color that standard gamma during i is corresponding Number；α_{γ i is current}The weight coefficient of any one color that described gamma is corresponding when being i for GTG；L_viHFor High gray brightness；L_viLFor minimum gray scale brightness；γ_StandardStandard gamma index when being i for GTG； γ_CurrentlyDescribed gamma index when being i for GTG.

13. according to the device described in described claim 8, it is characterised in that described device also includes storage Unit, is used for:

After calculating each numerical value comprised in the gamma array that described gamma exponent pair is answered, will Each data comprised in the gamma data of calculated gamma index and correspondence thereof are deposited Storage.