CN101105916A - GAMMA curve regulation method and device - Google Patents

GAMMA curve regulation method and device Download PDF

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Publication number
CN101105916A
CN101105916A CN 200710075600 CN200710075600A CN101105916A CN 101105916 A CN101105916 A CN 101105916A CN 200710075600 CN200710075600 CN 200710075600 CN 200710075600 A CN200710075600 A CN 200710075600A CN 101105916 A CN101105916 A CN 101105916A
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gamma
liquid crystal
crystal display
value
measured
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CN 200710075600
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Chinese (zh)
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李德祥
武永华
陈雪月
饶春荣
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东莞黄江达裕科技电子厂
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Abstract

The invention, applicable to liquid crystal display field, provides a method and device for adjusting Gamma curve. The method includes the following steps: re-measure the color coordinate (x, y) and brightness Lv corresponding with the gray-scale signal of the liquid crystal display; Separately calculate the R, G, and B values of the color coordinate (x, y) and brightness Lv; adjust the original Gamma table of the liquid crystal display according to the R, G, B, values and the target Gamma value; and upgrade the adjusted Gamma table into the liquid crystal display. According to the original Gamma value and target Gamma value of the liquid crystal display, the invention makes dynamic adjustment to the Gamma value of the liquid crystal display, so as to make the liquid crystal display achieve the best display effect.

Description

一种GAMMA曲线的调整方法及装置 A method and apparatus for adjusting GAMMA curve

技术领域 FIELD

本发明属于液晶显示领域,尤其涉及一种GAMMA曲线的调整方法及装置。 The present invention belongs to the field of liquid crystal display, and particularly to a method and apparatus for adjusting GAMMA curve.

背景技术 Background technique

对于液晶显示器,输入电压信号将在屏幕上产生亮度输出,但是液晶显示器的亮度与输入的电压信号不成正比,存在一种失真,如果输入的是黑白图像信号,这种失真将使被显示的图像的中间偏暗,从而使图像的调整体比原始场景偏暗,如果输入的是彩色图像信号,这种失真除了使显示的图像偏暗以外, 还会使显示的图像的色调发生偏移。 For the liquid crystal display, an input voltage signal generated on the output screen brightness, the brightness of the input voltage signal is not proportional to the liquid crystal display, there is a distortion if the input signal is a monochrome image, such distortion will cause the image to be displayed intermediate dim, so that the adjustment member than the original scene dim image, if the input signal is a color image, except that this distortion other than the image display dim, but also the tone of the image displayed shifted. 伽码(Gamma)就是这种失真的度量参数, 表征了亮度输出(Output)与输入电压信号(Input)的非线性关系,通常可以用下式来表示: Gamma (the Gamma) is a measure of this distortion parameters characterizing the linear relationship luminance output (Output) to the input voltage signal (Input) can usually be represented by the following formula:

output = input gamma ,由此可知,Gamma为指数函数中的幂。 output = input gamma, can be seen, Gamma power of an exponential function. 液晶显示器有其自身的原始Gamma值。 The liquid crystal display has its own original Gamma. Gamma的最佳值一J&为2.2左右, 这是因为人眼对亮度的感受约为1/2.2的Gamma。 Gamma is an optimum value of about 2.2 J & because the human eye perceives luminance Gamma about 1 / 2.2. 若液晶显示器的Gamma值恰好能补偿人眼的非线性,则对于线性的RGB信号,在视觉感受上便可以达到线性。 When the liquid crystal display Gamma value just enough to compensate for the nonlinear human eye, then a linear RGB signals in the visual perception you can achieve linear. 由于存在饱和失真,必须对液晶显示器的Gamma值进行测量和良好的控制,才能具备良好的颜色复现能力,提高液晶显示器的颜色透亮度和各灰阶的颜色复现能力,改善液晶显示器的画质。 Distortion due to saturation, must be a liquid crystal display of the measured values ​​Gamma and good control, in order to have a good color reproduction ability, improve the color and brightness of the LCD through the respective grayscale color reproduction capability, improved liquid crystal display Videos quality.

液晶显示器的Gamma值一般在出厂时按照统一的标准配置,难以针对不同液晶显示器的本身特性进行动态调整,从而使液晶显示器不能发挥最佳的显示效果。 Gamma value of the liquid crystal display in accordance with a uniform standard is generally configured at the factory, it is difficult to dynamically adjust for the different characteristics of the liquid crystal display itself, so that the liquid crystal display device can not play the best results.

发明内容 SUMMARY

本发明实施例的目的在于提供一种GAMMA曲线的调整方法,旨在解决现有技术中由于没有针对不同液晶显示器的本身特性动态调整其Gamma值,难以使液晶显示器发挥其最佳显示效果的问题。 Object of embodiments of the present invention is to provide a method for adjusting one kind GAMMA curve, to solve the prior art because there is no dynamic adjustment of Gamma characteristic itself for different values ​​of the liquid crystal display, a liquid crystal display is difficult to exert their best display problems .

本发明实施例是这样实现的, 一种GAMMA曲线的调整方法,所述方法包括下述步骤: Example embodiments of the present invention is implemented, one kind GAMMA curve adjustment method, the method comprising the steps of:

量测输入液晶显示器的灰阶信号所对应的色坐标(x, y)和亮度Lv; 根据量测的每一阶灰阶信号所对应的色坐标(x, y)和亮度Lv分别计算R、 G、 B量测值; Measuring the liquid crystal display input gradation signal corresponding color coordinates (x, y) and luminance Lv; each stage according to the gradation signal corresponding to the measured color coordinates (x, y), and calculates the luminance Lv R, G, B measured value;

#>据所述R、 G、 B量测值和目标Gamma值调整液晶显示器的原始Gamma #> According to the R, G, B measured value and the target value adjustment Gamma Gamma original liquid crystal display

表; table;

将调整后的Gamma表更新到液晶显示器中。 The adjusted Gamma table updates to the liquid crystal display.

本发明实施例的另一目的在于提供一种GAMMA曲线的调整装置,所述装置包括: Another object of embodiments of the present invention to provide an apparatus for adjusting GAMMA curve, said apparatus comprising:

色坐标亮度量测单元,用于量测输入液晶显示器的灰阶信号所对应的色坐标(x, y)和亮度Lv; Luminance color coordinate measurement unit configured to measure a liquid crystal display input gradation signal corresponding to the color coordinate (x, y) and luminance Lv;

RGB量测值计算单元,用于根据量测的每一阶灰阶信号所对应的色坐标(x, y)和亮度Lv分别计算R、 G、 B量测值; RGB measurement value calculating means for respectively calculating R, G, B measured values ​​according to each stage of the gradation signal corresponding to the measured color coordinates (x, y) and luminance Lv;

Gamma表调整单元,用于根据所述R、 G、 B量测值和目标Gamma值调整液晶显示器的原始Gamma表;以及 Gamma table adjustment unit for adjusting the original Gamma table liquid crystal display according to the R, G, B Gamma measurement value and a target value;

Gamma表更新单元,用于将调整后的Gamma表更新到液晶显示器中。 The updated Gamma table updating unit, configured to adjust the Gamma table in the liquid crystal display.

本发明实施例根据液晶显示器自身的原始Gamma值和目标Gamma值,对液晶显示器的Gamma值进行动态调整,可以使液晶显示器达到最佳的显示效果。 Embodiment of the present invention itself original Gamma Gamma value and a target value according to a liquid crystal display, the liquid crystal display of the Gamma value dynamically adjusted, the liquid crystal display can achieve the best results.

附图说明 BRIEF DESCRIPTION

图1是本发明实施例提供的GAMMA曲线调整方法的实现流程图; 图2是本发明实施例适用的GAMMA曲线调整系统的结构图; 图3是本发明第一实施例适用的GAMMA曲线调整装置的结构图; 图4是本发明第二实施例适用的GAMMA曲线调整装置的结构图。 FIG 1 is a flowchart of a method implemented GAMMA curve adjustment according to an embodiment of the present invention; FIG. 2 is a configuration diagram of a suitable embodiment of GAMMA curve adjustment system of the present invention; FIG. 3 is a graph GAMMA adjusting device according to the first embodiment of the present invention is applicable configuration; Figure 4 is a second embodiment of the present invention is applicable to the structure of FIG GAMMA curve adjustment device.

具体实施方式 Detailed ways

为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。 To make the objectives, technical solutions and advantages of the present invention will become more apparent hereinafter in conjunction with the accompanying drawings and embodiments of the present invention will be further described in detail. 应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。 It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention.

在本发明实施例中,根据液晶显示器自身的原始Gamma值和目标Gamma 值,对液晶显示器的Gamma值进行动态调整,使液晶显示器达到最佳的显示效果。 In an embodiment of the present invention, a liquid crystal display in accordance with their original Gamma Gamma value and the target value, Gamma value of the liquid crystal display is dynamically adjusted so that the liquid crystal display to achieve the best results.

液晶显示器有其自身的原始Gamma值, 一般介于2.0-2.4之间,即当输入信号幅度(Input signal level)为线性,且其图像处理芯片内部的Gamma功能禁用(Disable)时,输出影像呈现的是液晶显示器的原始Gamma值。 When the liquid crystal display device has its own original Gamma value, typically between 2.0 - 2.4, i.e., when the amplitude of the input signal (Input signal level) is linear, and its internal image processing chip Gamma feature is disabled (the Disable), the video presentation output Gamma is the original value of the liquid crystal display. 在本发明实施例中,通过从.0-255阶中选取有限数量阶进行量测,动态调整液晶显示器的Gamma值,特别适合在自动化生产线上更新液晶显示器的Gamma表。 In an embodiment of the present invention, by selecting a limited number of Gamma value order from .0-255 measuring step is carried out dynamically adjust the liquid crystal display, particularly suitable for a liquid crystal display update in an automated production line Gamma table.

图1示出了本发明实施例提供的GAMMA曲线调整方法的实现流程,详述如下: , FIG 1 shows a flow of the method of the present invention achieves GAMMA curve adjustment according to an embodiment, described in detail as follows:,

在步骤S101中,量测输入液晶显示器的灰阶信号所对应的色坐标(x, y) 和亮度(Lv)。 In step S101, the liquid crystal display measured input signal corresponding to grayscale color coordinates (x, y) and luminance (Lv).

当在自动化生产线上对液晶显示器进行Gamma校正时, 一般只需要量测几阶灰阶信号就可以了,在本发明实施例中,输入液晶显示器的视频信号为从0-255阶中选取的有限数量阶灰阶信号。 Gamma correction when the liquid crystal display automated production line, generally only a few bands grayscale signal measurement requirement can be, in the embodiment of the invention, the input video signal to the liquid crystal display 0-255 order selected from a limited order number grayscale signal. 选取的阶数根据实际调整需要确定, 选取的阶数越多,调整效果越好,但是调整时间会越长。 Select the order is determined based on the actual adjustment, the more the order chosen, the better the effect of the adjustment, but the adjustment time will be longer. 如果不在自动化生产线上实时量测和更新Gamma表,则可以全部量测0〜255阶灰阶信号。 If not automated production line real-time measurements and updated Gamma table, you can measure the amount of all the grayscale signal 0~255 order.

在后续调整过程中,由于要对数据进行标准化处理,所以要量测255阶的灰阶信号所对应的x, y和Lv数据。 In the subsequent adjustment process, since the data to be normalized, so measured signal 255 gray scales corresponding to the x, y and Lv data.

在步骤S102中,才艮据量测的每一阶灰阶信号所对应的x, y和Lv数据分别计算R、 G、 B量测值。 In step S102, according to each stage it was Gen grayscale signal measurement corresponding to the x, y and Lv data are R, G, B measured value calculation.

在本发明实施例中,通过下式计算R、 G、 B量测值: In an embodiment of the present invention, calculated by the formula R, G, B measured value:

(1) 根据量测的x, y和Lv数据,计算C正-XYZ光i普三刺激值: (1) The measurement of the x, y and Lv data, calculate P C n i -XYZ light tristimulus values:

X=(-)*Lv, Y=Lv, Z=(i^)*Lv; X = (-) * Lv, Y = Lv, Z = (i ^) * Lv;

yy yy

(2) 对CIE-XYZ光i普三刺激值进行标准化处理: (2) CIE-XYZ tristimulus light values ​​P i are normalized:

X=X/Y(255) Y=Y/Y(255) Z= z/Y(255),其中,Y(255)表示在255阶下对应的亮度; X = X / Y (255) Y = Y / Y (255) Z = z / Y (255), wherein, Y (255) represents a luminance corresponding to step 255;

(3) 将标准化后的CIE-XYZ光语三刺激值转换为RGB色彩空间: (3) converting the CIE-XYZ tristimulus light values ​​after Language normalized RGB color space:

<formula>formula see original document page 7</formula> <Formula> formula see original document page 7 </ formula>

(4)对r、 g、 b分别进行标准化处理,获得R、 G、 B量测值。 (4) r g, b were normalized, to obtain R, G, B values ​​measured. 在本发明实施例中,根据下式对r、 g、 b值分别进行标准化处理: In an embodiment of the present invention, the formula for normalized r, g, b values ​​are in accordance with:

!^"7^^255;G:^I^承255;B^^^255, r(255)、 b(25S)、 g(255)分别r(255) g(255) b(255) ! ^ "7 ^^ 255; G: ^ I ^ bearing 255; B ^^^ 255, r (255), b (25S), g (255), respectively, r (255) g (255) b (255)

为255阶对应的r、 g、 b量测值。 255 steps corresponding to r, g, b values ​​measured.

在步骤S103中,根据R、 G、 B量测值和目标Gamma值调整液晶显示器的;fj会Gamma表。 In step S103, the liquid crystal display according to adjust R, G, B Gamma measurement value and a target value; FJ will Gamma table.

在本发明的一个实施例中,首先利用R、 G、 B量测值计算液晶显示器的原始Gamma值,然后才艮据目标Gamma值调整液晶显示器的Gamma表。 In one embodiment of the present invention, the original is first calculated using the Gamma value of the liquid crystal display R, G, B measured value, the target data before Gen LCD Gamma Gamma adjustment value table.

在本发明实施例中,R、 G、 B对应的液晶显示器原始Gamma值可以分别利用最小二乘法公式计算: In an embodiment of the present invention, R, G, B corresponding to the original Gamma liquid crystal display value can be calculated using the least squares equations, respectively:

》og(Pi)log(Yi) Y='》og(Pi)2 "Og (Pi) log (Yi) Y = '" og (Pi) 2

其中,Y为液晶显示器的原始Gamma值,Pi为灰阶信号所对应的输入阶数, Yi为灰阶信号输入阶数对应的R、 G或者B量测值。 Wherein Y is the original input order Gamma value of a liquid crystal display, a signal Pi corresponding to the gray scale, Yi corresponding to the input grayscale order signals R, G or B values ​​measured.

这样,可以获得R、 G、 B对应的液晶显示器原始Gamma值。 Thus, it is possible to obtain R, G, B corresponding to the original Gamma value of a liquid crystal display.

然后,才艮据目标gamma值,对液晶显示器的原始Gamma值进行调整。 Then, before the target gamma value according Burgundy, the original value of the liquid crystal display Gamma adjusted. 如果液晶显示器的Gamma值为A,则: If the liquid crystal display of the Gamma value A, then:

Y=C*[(X/255) A],其中,X为输入阶数,介于0-255, Y为灰阶信号输入阶数对应的R、 G或者B量测值,C为液晶显示器的最大R、 G或者B量测值。 Y = C * [(X / 255) A], wherein, X is the input order, between 0-255, Y is a gray scale signal corresponding to the input order of R, G, B or the measured value, C is a liquid crystal display the maximum R, G or B values ​​measured.

假设液晶显示器输出的目标Gamma值为T,输入阶数X对应的R、 G或者B量测值为: The liquid crystal display is assumed that the target output value Gamma T, X corresponding to the order of input R, G or B value measured:

Y=C*[(X/255) T] Y = C * [(X / 255) T]

因此,需要将图像处理芯片的Gamma表设为: Therefore, the image processing chip Gamma tables need to be set:

M=C*[(X/255)(T/A)],其中,M为调整后的Gamma表中的R、 G或者B值。 M = C * [(X / 255) (T / A)], where, M being Gamma table in the adjusted R, G, or B values. 即假设要将Gamma2.2的液晶显示器特性改为2.6,则图像处理芯片的Gamma表中的值应为2.6/2.2=1.18倍的液晶显示器的原始Gamma值,分别调整R、 G、 B对应的Gamma表,即可获得调整后^L频处理芯片的R、 G、 B三个Gamma表。 I.e., assuming a liquid crystal display characteristics To 2.6 Gamma2.2 changed, the value of the image processing chip of the Gamma table original Gamma value should be 2.6 / 2.2 = 1.18 times of a liquid crystal display, were adjusted R, G, B corresponding after Gamma table, to obtain the frequency adjustment processing chip ^ L R, G, B three Gamma table.

在本发明的另一实施例中,根据R、 G、 B量测值和目标Gamma值进行数据匹配,选择最接近目标Gamma值的一阶放入当前阶的Gamma表中。 Embodiment, the data matched according to R, G, B Gamma measured value and the target value, selecting a rank order into the current Gamma Gamma table closest to the target value in another embodiment of the present invention.

如下表所示,々I设期望目标输出的Gamma值为2.2,对于51阶来说,实际量测值为4.29,目标输出值为7.39,则从量测值中选择最接近期望值的对应的那一阶填入Gamma表中。 As shown below, provided 々I Gamma desired target output value of 2.2 for the 51-order, the actual measurement value is 4.29, the target output value is 7.39, the measured value from the selected expected value that is closest to the corresponding Gamma order to fill a table. 假设与7.39最接近的数值为7.24,即为60阶,则将60填入到Gamma表中: Assumed value of the nearest 7.39 7.24, i.e. the order 60, 60 will be filled into Gamma table:

<table>table see original document page 8</column></row> <table> <Table> table see original document page 8 </ column> </ row> <table>

<table>table see original document page 9</column></row> <table> <Table> table see original document page 9 </ column> </ row> <table>

由于液晶显示器的原始s形透过率特性值,为了得到更好的显示效果,在 Since the transmittance of s-shaped characteristic values ​​of the original liquid crystal display, in order to obtain better display effect,

本发明实施例中,需要针对低阶和高阶进行一些处理。 Embodiments of the present invention, some processing is required for the low-order and high-order.

从下表可以看出,因为Gamma表中填入同样的数,在显示效果上没有办法区分出低阶来。 As can be seen from the table, since the table Gamma fill the same number, there is no way to distinguish between low-level on the display.

<table>table see original document page 9</column></row> <table> <table>table see original document page 10</column></row> <table> <Table> table see original document page 9 </ column> </ row> <table> <table> table see original document page 10 </ column> </ row> <table>

本发明实施例针对上述情况进行相应处理。 Embodiments of the present invention is accordingly for the above process. 首先,根据用户选择处理的高 First, the user selects the high processing

阶或者低阶的阶数,以及所选择的阶数中最高阶数对应的R、 G、 B量测值计算每阶的步长,然后,根据每阶的步长对R、 G、 B量测值进行初始化。 Order or lower order of order, and the order of the selected corresponding to the highest order of R, G, B measured value calculating step for each order, and then, for each step of the order R, G, B according to the amount of the measurement value is initialized. 例如前17阶,每阶的步长为step=17阶的量测值/18,则每阶的量测值变为:阶数x step。 For example the first 17 bands, each band of steps of step = 17 order measured value / 18, the measured value of each stage becomes: order x step. 然后再进行数据匹配过程,如下表所示。 Data matching process is then performed, as shown in the following table. 高阶也做同样的处理,不再赘述。 Do the same higher-order processing, not repeat them.

<table>table see original document page 10</column></row> <table> <Table> table see original document page 10 </ column> </ row> <table>

<table>table see original document page 11</column></row> <table>在步骤S104中,将调整后的Gamma表更新到液晶显示器中。 <Table> table see original document page 11 </ column> </ row> <table> In step S104, the adjusted Gamma table updates to the liquid crystal display.

图2示出了本发明实施例适用的GAMMA曲线调整系统的结构,主机21 通过RS132接口控制视频信号发生器22产生0-255阶的灰阶信号。 FIG 2 shows a configuration example of the present invention is applicable GAMMA curve adjustment system of the embodiment, the host 21 controls the video signal generator 22 generates grayscale signal 0-255 order by RS132 interfaces. 视频信号发生器22产生的灰阶信号通过视频图像阵列(Video Graphics Array, VGA)接口输出给液晶显示器25。 Grayscale signal of the video signal generator 22 outputs to the liquid crystal display 25 through the video graphics array (Video Graphics Array, VGA) interface.

主机21通过RS132接口控制色彩分析仪23,利用一见频探测器24量测液晶显示器25中每一阶灰阶信号所对应的色坐标(x, y)和亮度(Lv),根据量测到的x, y和Lv数据,分别计算R、 G、 B量测值,然后根据所述R、 G、 B 量测值和目标Gamma值调整液晶显示器25的原始Gamma表。 RS132 interface control host 21 through the color analyzer 23, using a frequency detector measuring an amount of 24 to see the liquid crystal display 25 in each stage of the grayscale signal corresponding color coordinates (x, y) and luminance (Lv), measured according to x, y, Lv and data, calculates R, G, B measured value, then adjust the monitor Gamma original table 25 based on the R, G, B measured value and the target value Gamma. Gamma表调整完成后,通过内部集成电路(Inter - Integrated Circuit, I2C ) IIC视频接口直接或者RS132接口将Gamma表更新到液晶显示器25,从而实现对液晶显示器25 的Gamma曲线的动态调整。 Gamma table after the adjustment is completed, through an internal IC (Inter - Integrated Circuit, I2C) IIC video interface or RS132 interface directly updated Gamma table 25 to the liquid crystal display, in order to achieve dynamic adjustment of the liquid crystal display 25 of the Gamma curve.

图3示出了本发明实施例提供的GAMMA曲线调整装置的结构,为了便于说明,仅示出了与本发明实施例相关的部分,该装置为在主机21中运行的软件单元,或者软硬件相结合的单元。 FIG 3 shows a structure of the present invention GAMMA curve adjustment device according to an embodiment, for convenience of explanation, only a part related to the embodiment of the present invention, the device is a software running in the host unit 21, or hardware and software cell binding phase.

色坐标亮度量测单元31量测输入液晶显示器25的灰阶信号中相应阶数灰阶信号所对应的色坐标(x, y)和亮度Lv。 31 the amount of the color coordinate measurement unit measuring the luminance gradation signal input to the liquid crystal display 25 in the order corresponding to the gray scale signal corresponding to the color coordinate (x, y) and luminance Lv.

RGB量测值计算单元32根据量测的每一阶灰阶信号所对应的色坐标(x, y)和亮度Lv分别计算R、 G、 B量测值,其中,刺激值计算模块311根据量 RGB measurement value calculating unit 32 in accordance with each step of the gray scale signal corresponding to the measured color coordinates (x, y) and luminance Lv calculates R, G, B measured value, wherein the stimulus value calculation module 311 based on the amount

测的色坐标(x, y)和亮度Lv,计算CIE-XYZ光谱三刺激值,刺激值标准化处理模块312对CIE-XYZ光谱三刺激值进行标准化处理,色彩空间转换模块313将标准化后的CIE-XYZ光语三刺激值转换为RGB色彩空间,RGB标准化处理模块314对RGB色彩空间的r、 g、 b量测值分别进行标准化处理,获得R、 G、 B量测值。 Measuring color coordinates (x, y) and luminance Lv, calculate CIE-XYZ spectral tristimulus values, stimulus value normalization processing module 312 pairs CIE-XYZ spectral tristimulus values ​​are normalized, the color space conversion CIE the module 313 will be normalized language -XYZ light tristimulus values ​​into an RGB color space, RGB processing module 314 pairs R & lt normalized RGB color space g, b values ​​were measured normalized, to obtain R, G, B values ​​measured.

Gamma表调整单元33根据所述R、 G、 B量测值和目标Gamma值调整液晶显示器25的原始Gamma表。 Gamma table adjustment unit 33 to adjust the liquid crystal display of the original Gamma table 25 according to the R, G, B measured value and the target value Gamma.

作为Gamma表调整单元33的一个实施例,原始Gamma值计算模块331 根据所述R、 G、 B量测值计算液晶显示器的原始Gamma值,Gamma值调整模块332根据所述液晶显示器的原始Gamma值和目标Gamma值调整液晶显示器的Gamma表。 Embodiment, the original value calculation module 331 Gamma Gamma value of the original liquid crystal display according to the calculated R, G, B measured value as a Gamma table adjusting unit of the embodiment 33, the value of the adjustment module 332 Gamma Gamma value of the original liquid crystal display according target value and adjust the monitor's Gamma Gamma table.

在Gamma表调整单元33的另一实施例中,如图4所示,数据匹配模块33T 根据R、 G、 B量测值和目标Gamma值进行数据匹配,Gamma值选择模块33 2 '选择舉接近目标Gamma值的一阶放入当前阶的Gamma表中。 Gamma table In another embodiment adjustment unit 33, as shown, a data matching module 4 according to 33T matching data R, G, B Gamma measured value and the target value, Gamma value selection module 332 'move closer to select the first order in the destination Gamma Gamma value of the current stage of the table.

由于液晶显示器的原始S形透过率特性值,为了得到更好的显示效果,在本发明实施例中,RGB量测值初始化模块33 3 '根据用户选择处理的高阶或者低阶的阶数,以及所选择的阶数中最高阶数对应的R、 G、 B量测值计算每阶的步长,并根据每阶的步长对R、 G、 B量测值进行初始化。 Since the original S-value of the transmittance characteristic of the liquid crystal display, in order to obtain better display, in the embodiment of the present invention, the RGB values ​​of the measurement initialization module 333 'according to a user selection processing of high-order or low-order order , and the selected order of the highest order corresponding to R, G, B measured value calculating step of each stage, and each stage of the step size R, G, B according to the measured values ​​are initialized.

Gamma表调整完成后,Gamma表更新单元34将调整后的Gamma表更新到液晶显示器25中。 Gamma table updated after the adjustment is completed, Gamma table updating unit 34 will adjust the Gamma table 25 to the liquid crystal display.

本发明实施例可以针对每个液晶显示器的特性对其Gamma值进行动态调整,让液晶显示器发挥最佳的显示效果。 Embodiments of the present invention can dynamically adjust its value for Gamma characteristic of each liquid crystal display, liquid crystal display unit to play the best results.

以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 The above are only preferred embodiments of the present invention but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent replacements and improvements should fall in the protection of the present invention within range.

Claims (9)

1、一种GAMMA曲线的调整方法,其特征在于,所述方法包括下述步骤: 量测输入液晶显示器的灰阶信号所对应的色坐标(x,y)和亮度Lv; 根据量测的每一阶灰阶信号所对应的色坐标(x,y)和亮度Lv分别计算R、G、B量测值; 根据所述R、G、B量测值和目标Gamma值调整液晶显示器的原始Gamma表; 将调整后的Gamma表更新到液晶显示器中。 1, one kind of method for adjusting GAMMA curve, characterized in that, said method comprising the steps of: measuring the gray scale liquid crystal display input signal corresponding to the color coordinate (x, y) and luminance Lv; according to each of the measured order color coordinates (x, y) and a gray scale signal corresponding to the luminance Lv calculates R, G, B measured values; liquid crystal display according to the adjusted R, G, B measured value and the target values ​​of the original Gamma Gamma table; the adjusted Gamma table updates to the liquid crystal display.
2、 如权利要求1所述的方法,其特征在于,所述根据量测的每一阶灰阶信号所对应的色坐标(x, y)和亮度Lv分别计算R、 G、 B量测值的步骤具体为:根据量测的色坐标(x, y)和亮度Lv,计算CIE-XYZ光谱三刺激值; 对CIE-XYZ光谱三刺激值进行标准化处理; 将标准化后的CIE-XYZ光谱三刺激值转换为RGB色彩空间; 对RGB色彩空间的r、 g、 b量测值分别进行标准化处理,获得R、 G、 B 量测值。 2. The method as claimed in claim 1, characterized in that said gradation signal according to each stage corresponding to the measured color coordinates (x, y) and luminance Lv calculates R, G, B measured value the step is specifically as: (x, y) and luminance Lv, calculate CIE-XYZ spectral tristimulus values ​​according to the color coordinate measurement; and to the CIE-XYZ spectral tristimulus values ​​are normalized; the CIE-XYZ spectrum normalized three stimulus value into an RGB color space; R & lt on the RGB color space, g, b values ​​were measured normalized, to obtain R, G, B values ​​measured.
3、 如权利要求l所述的方法,其特征在于,所述根据所述R、 G、 B量测值和目标Gamma值调整液晶显示器的原始Gamma表的步骤具体为:根据所述R、 G、 B量测值计算液晶显示器的原始Gamma值; 根据所述液晶显示器的原始Gamma值和目标Gamma值调整液晶显示器的Gamma表。 3. The method of claim l, wherein the step of original Gamma table liquid crystal display according to the adjustment of the R, G, B Gamma measured value and the target value is specifically as follows: according to the R, G , B liquid crystal display of the measurement value calculation original Gamma value; liquid crystal display according to adjust the original Gamma Gamma value and a target value of the liquid crystal display of the Gamma table.
4、 如权利要求3所述的方法,其特征在于,所述液晶显示器的原始Gamma 值通过下式计算:<formula>formula see original document page 2</formula>其中,y为液晶显示器的原始Gamma值,Pi为灰阶信号所对应的输入阶数,Yi为灰阶信号输入阶数对应的R、 G或者B量测值。 4. The method as claimed in claim 3, characterized in that the original value of the liquid crystal display Gamma calculated by the formula: <formula> formula see original document page 2 </ formula> where, y is the liquid crystal display of the original Gamma value, Pi is the input order corresponding to the gradation signal, Yi gray scale signal corresponding to the input order of R, G or B values ​​measured.
5、 如权利要求3所述的方法,其特征在于,所述液晶显示器的Gamma表中的Gamma值通过下式调整:M=C*[(X/255)(T/A)],其中,M为调整后的Gamma表中的R、 G或者B值, X为输入阶数,介于0~255, C为液晶显示器的最大R、 G或者B量测值,T 为液晶显示器输出的目标Gamma值,A为液晶显示器的原始Gamma值。 5. The method of claim 3, characterized in that, the value of Gamma Gamma table in the liquid crystal display by adjusting the following formula: M = C * [(X / 255) (T / A)], wherein M to adjust the Gamma table in the R, G or B value, X is the input order, between 0 ~ 255, C is the maximum liquid crystal display R, G, B or the measured values, a target output of a liquid crystal display T Gamma value, a is the original Gamma value of the liquid crystal display.
6、 如权利要求l所述的方法,其特征在于,所述根据R、 G、 B量测值和目标Gamma值调整液晶显示器的原始Gamma表的步骤具体为:根据R、 G、 B量测值和目标Gamma值进行数据匹配; 选择最接近目标Gamma值的一阶放入当前阶的Gamma表中。 6. A method as claimed in claim l, characterized in that, according to the R, G, B Gamma measurement value and a target value adjusting step of the original liquid crystal display device is specifically Gamma table: The R, G, B measured Gamma value and a target value data match; selected order into a current order Gamma Gamma table closest to the target value.
7、 如权利要求6所述的方法,其特征在于,在所述根据R、 G、 B量测值和目标Gamma值进行数据匹配的步骤之前,所述方法进一步包括:根据用户选择处理的高阶或者低阶的阶数,以及所选择的阶数中最高阶数对应的R、 G、 B量测值计算每阶的步长;根据每阶的步长对R、 G、 B量测值进行初始化。 Prior to 7, A method as claimed in claim 6, wherein the step of matching data according to R, G, B measured value and the target value of the Gamma, said method further comprising: according to a user selection processing high order or lower order of order, and the order of the selected corresponding to the highest order of R, G, B measured value calculating step for each order; order according to each step size R, G, B measured value initialized.
8、 如权利要求1至7任一权利要求所述的方法,其特征在于,所述输入液晶显示器的灰阶信号为从0〜255阶中选取的有限数量阶灰阶信号。 8, as claimed in any one of claims 1 to 7, A method as claimed in claim, wherein the liquid crystal display of the gradation signal input stage for a limited number of gray-scale signals from the selected order of 0~255.
9、 一种GAMMA曲线的调整装置,其特征在于,所述装置包括: 色坐标亮度量测单元,用于量测输入液晶显示器的灰阶信号所对应的色坐标(x, y)和亮度Lv;RGB量测值计算单元,用于根据量测的每一阶灰阶信号所对应的色坐标(x, y)和亮度Lv分别计算R、 G、 B量测值;Gamma表调整单元,用于根据所述R、 G、 B量测值和目标Gamma值调整液晶显示器的原始Gamma表;以及Gamma表更新单元,用于将调整后的Gamma表更新到液晶显示器中。 9, an apparatus for adjusting GAMMA curve, characterized in that said apparatus comprising: a luminance color coordinate measuring unit for measuring an amount of the liquid crystal display input gradation signal corresponding to the color coordinate (x, y) and luminance Lv ; measuring the RGB value calculating unit for each step of the gray scale signal corresponding to the measured color coordinates (x, y) and luminance Lv calculates R, G, B measured value; the Gamma table adjustment unit for the liquid crystal display according to the adjustment of the R, G, B measured value and the target value of the original Gamma Gamma table; and Gamma table updating means for updating the table Gamma adjusted to the liquid crystal display.
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