JP2003140633A - METHOD FOR DETECTING ABNORMALITY OF gamma CHARACTERISTIC - Google Patents
METHOD FOR DETECTING ABNORMALITY OF gamma CHARACTERISTICInfo
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- JP2003140633A JP2003140633A JP2001340718A JP2001340718A JP2003140633A JP 2003140633 A JP2003140633 A JP 2003140633A JP 2001340718 A JP2001340718 A JP 2001340718A JP 2001340718 A JP2001340718 A JP 2001340718A JP 2003140633 A JP2003140633 A JP 2003140633A
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は画像表示デバイスの
階調制御に関するものであり、特にγ特性を調整・管理
する手法に関わるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gradation control of an image display device, and more particularly to a method of adjusting / managing the γ characteristic.
【0002】[0002]
【従来の技術】図2は、γ特性の調整に関する従来の技
術の一例である特開2001−34242に紹介された
技術を示すブロック図である。色相調整手段1は映像信
号を入力して色信号の飽和度、色信号の復調角、復調ゲ
イン、ティントを制御する。表示素子2は調整後の信号
を映像出力する。検出手段3は表示素子2の発光面にお
いて色度点を検出する。制御手段4は検出した色度点に
応じて目標の色度点に近づけるように色相調整手段1に
補正データを送出する。2. Description of the Related Art FIG. 2 is a block diagram showing a technique introduced in Japanese Patent Application Laid-Open No. 2001-34242, which is an example of a conventional technique relating to the adjustment of the γ characteristic. The hue adjusting unit 1 receives the video signal and controls the saturation of the color signal, the demodulation angle of the color signal, the demodulation gain, and the tint. The display element 2 outputs the adjusted signal as an image. The detecting means 3 detects a chromaticity point on the light emitting surface of the display element 2. The control means 4 sends correction data to the hue adjustment means 1 so as to approach the target chromaticity point according to the detected chromaticity point.
【0003】ガンマ補正の手順は下記の如く実行され
る。検出手段3が表示素子2に表示されている画像の色
度点及び輝度を検出する。制御手段4は検出された色度
点から、他の任意の色度点へと近づけるために差分デー
タを作成し、補正データとして色相調整手段1に送出す
る。ガンマ調整手段5は任意の色度点での輝度特性を補
正する。The gamma correction procedure is performed as follows. The detection means 3 detects the chromaticity point and the brightness of the image displayed on the display element 2. The control unit 4 creates difference data from the detected chromaticity point to bring it closer to another arbitrary chromaticity point, and sends it to the hue adjustment unit 1 as correction data. The gamma adjusting means 5 corrects the luminance characteristic at an arbitrary chromaticity point.
【0004】図3は輝度特性の補正を示すグラフであ
る。図3において(ア)は調整する色の蛍光面でのガン
マ特性を示している。そして図3(イ)で示されたA点
及びB点のポイントをガンマ調整手段5が調整する。こ
れにより、調整する色の発光特性が図3(ア)に近づけ
られる。ガンマ調整手段5が調整するポイントは、A点
及びB点のみならず、多くする方が、より図3(ア)に
近づけることができる。FIG. 3 is a graph showing correction of brightness characteristics. In FIG. 3, (a) shows the gamma characteristic on the phosphor screen of the color to be adjusted. Then, the gamma adjusting means 5 adjusts the points A and B shown in FIG. As a result, the emission characteristic of the color to be adjusted is brought close to that in FIG. The points to be adjusted by the gamma adjusting means 5 are not limited to the points A and B, but the more points can be brought closer to FIG. 3A.
【0005】[0005]
【発明が解決しようとする課題】上記の従来技術に例示
されるγ変換処理を行う場合、諸々の理由により、調整
の目標とするγ特性に調整したはずの表示デバイスのγ
特性が、評価時には調整の目標としたγ特性から外れる
場合がある。When performing the γ conversion processing exemplified in the above-mentioned prior art, due to various reasons, the γ characteristic of the display device that should have been adjusted to the γ characteristic to be adjusted is desired.
The characteristic may deviate from the γ characteristic targeted for adjustment at the time of evaluation.
【0006】その理由の一つとして表示デバイスの経時
変化が挙げられる。例えば液晶素子を用いた表示デバイ
スでは、液晶素子そのもののγ特性が通電時間により変
化する場合がある。そしてγ調整を行った時点では目標
とするγ特性と一致していても、評価時には調整時とは
異なるγ特性を示してしまう場合がある。本発明では調
整時に目標としたγ特性と、評価時におけるγ特性との
ズレを短時間で検出する技術を提供する。One of the reasons for this is the change with time of the display device. For example, in a display device using a liquid crystal element, the γ characteristic of the liquid crystal element itself may change depending on the energization time. Even if the target γ characteristic matches at the time when the γ adjustment is performed, the γ characteristic different from that at the time of adjustment may be displayed at the time of evaluation. The present invention provides a technique for detecting a deviation between the target γ characteristic during adjustment and the γ characteristic during evaluation in a short time.
【0007】[0007]
【課題を解決するための手段】この発明のうち請求項1
にかかるものは、γ特性の異常を検出する方法であっ
て、(a)R(赤)、G(緑)、B(青)の三色につい
ての階調値の組(r,g,b)に基づいて表示デバイス
にカラー表示をさせる工程と、(b)前記工程(a)で
得られた前記カラー表示のXYZ刺激値を測定する工程
とを備える。そして、前記工程(a),(b)は前記階
調値の組の値を(rm,gm,bm),(r2,gm,
bm),(rm,g2,bm),(rm,gm,b2),
(r3,g3,b3)として繰り返し実行される(但し、
R(赤)の階調値の最小値をrm、最大値をrM、G
(緑)の階調値の最小値をgm、最大値をgM、B(青)
の階調値の最小値をbm、最大値をbMとし、rm<r3<
r2≦rM,gm<g3<g2≦gM,bm<b3<b2≦
bM)。更に、(c)前記階調値の組(rm,gm,
bm),(r2,gm,bm),(rm,g2,bm),
(rm,gm,b2)における前記XYZ刺激値から、前
記階調値の組(r3,g3,b3)における理論的なxy
色度値を求める工程と、(d)前記階調値の組(r3,
g3,b3)における前記XYZ刺激値から、前記階調値
の組(r3,g3,b3)におけるxy色度値を求め、こ
れを前記工程(c)で得られた前記理論的なxy色度値
値と比較する工程とを備える。[Means for Solving the Problems] Claim 1 of the present invention
Is a method for detecting an abnormality in the γ characteristic, and includes (a) a set of gradation values (r, g, b) for three colors of R (red), G (green), and B (blue). And (b) measuring the XYZ stimulus value of the color display obtained in the step (a). Then, in the steps (a) and (b), the values of the set of gradation values are (r m , g m , b m ), (r 2 , g m ,
b m), (r m, g 2, b m), (r m, g m, b 2),
(R 3 , g 3 , b 3 ) is repeatedly executed (however,
The minimum value of R (red) gradation value is r m , the maximum value is r M , G
The minimum gradation value of (green) is g m , the maximum is g M , and B (blue)
Let b m be the minimum gradation value and b M be the maximum gradation value, and r m <r 3 <
r 2 ≦ r M , g m <g 3 <g 2 ≦ g M , b m <b 3 <b 2 ≦
b M ). Further, (c) the set of gradation values (r m , g m ,
b m ), (r 2 , g m , b m ), (r m , g 2 , b m ),
From the XYZ stimulus values at (r m , g m , b 2 ) the theoretical xy at the set of tone values (r 3 , g 3 , b 3 ).
A step of obtaining a chromaticity value, and (d) a set of the gradation values (r 3 ,
g 3, b 3 from the XYZ stimulus values of), obtains the xy chromaticity values in the set of the tone values (r 3, g 3, b 3), the theory which was obtained in the step (c) A specific xy chromaticity value.
【0008】この発明のうち請求項2にかかるものは、
請求項1に記載のγ特性の異常を検出する方法であっ
て、(e)R(赤)、G(緑)、B(青)の三色につい
ての階調値の組(r,g,b)に基づいて表示デバイス
にカラー表示をさせる工程と、(f)前記工程(e)で
得られた前記カラー表示の輝度を測定する工程とを更に
備える。そして、前記工程(e),(f)は前記階調値
の組の値を(r1,g0,b0),(r2,g0,b0),
(r3,g0,b0)として繰り返し実行される(但し、
rm≦r1<r3,gm≦g0≦gM,bm≦b0≦bM)。更
に、(g)前記階調値の組(r1,g0,b0),(r2,
g0,b0)における前記輝度から、前記階調値の組(r
3,g0,b0)における理論的な輝度を求める工程と、
(h)前記階調値の組(r3,b0,g0)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを備える。According to claim 2 of the present invention,
A method for detecting an abnormality in the γ characteristic according to claim 1, wherein a set of gradation values (r, g, R) for three colors of (e) R (red), G (green), and B (blue). The method further comprises the steps of causing a display device to perform color display based on b), and (f) measuring the brightness of the color display obtained in step (e). Then, in the steps (e) and (f), the values of the set of gradation values are (r 1 , g 0 , b 0 ), (r 2 , g 0 , b 0 ),
It is repeatedly executed as (r 3 , g 0 , b 0 ) (however,
r m ≤r 1 <r 3 , g m ≤g 0 ≤g M , b m ≤b 0 ≤b M ). Further, (g) the set of gradation values (r 1 , g 0 , b 0 ), (r 2 ,
From the luminance at g 0 , b 0 ), the set of gradation values (r
3 , g 0 , b 0 ), the step of obtaining a theoretical luminance,
(H) Comparing the luminance obtained in the step (f) and the theoretical luminance obtained in the step (g) for the set of gradation values (r 3 , b 0 , g 0 ). And a step of performing.
【0009】この発明のうち請求項3にかかるものは、
請求項2に記載のγ特性の異常を検出する方法であっ
て、r1=rmが成立する。According to claim 3 of the present invention,
A method for detecting an abnormality in γ characteristic according to claim 2, r 1 = r m is established.
【0010】この発明のうち請求項4にかかるものは、
請求項1に記載のγ特性の異常を検出する方法であっ
て、(e)R(赤)、G(緑)、B(青)の三色につい
ての階調値の組(r,g,b)に基づいて表示デバイス
にカラー表示をさせる工程と、(f)前記工程(e)で
得られた前記カラー表示の輝度を測定する工程とを更に
備える。そして、前記工程(e),(f)は前記階調値
の組の値を(r0,g1,b0),(r0,g2,b0),
(r0,g3,b0)として繰り返し実行される(但し、
rm≦r0≦rM,gm≦g1<g3,bm≦b0≦bM)。更
に、(g)前記階調値の組(r0,g1,b0),(r0,
g2,b0)における前記輝度から、前記階調値の組(r
0,g3,b0)における理論的な輝度を求める工程と、
(h)前記階調値の組(r0,g3,b0)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを備える。According to claim 4 of the present invention,
A method for detecting an abnormality in the γ characteristic according to claim 1, wherein a set of gradation values (r, g, R) for three colors of (e) R (red), G (green), and B (blue). The method further comprises the steps of causing a display device to perform color display based on b), and (f) measuring the brightness of the color display obtained in step (e). Then, in the steps (e) and (f), the values of the set of gradation values are (r 0 , g 1 , b 0 ), (r 0 , g 2 , b 0 ),
(R 0 , g 3 , b 0 ) is repeatedly executed (however,
r m ≤r 0 ≤r M , g m ≤g 1 <g 3 , b m ≤b 0 ≤b M ). Further, (g) the set of gradation values (r 0 , g 1 , b 0 ), (r 0 ,
From the luminance at g 2 , b 0 ), the set of gradation values (r
0 , g 3 , b 0 ) and a step of obtaining a theoretical brightness at
(H) comparing the luminance obtained in the step (f) and the theoretical luminance obtained in the step (g) for the set of gradation values (r 0 , g 3 , b 0 ). And a step of performing.
【0011】この発明のうち請求項5にかかるものは、
請求項4に記載のγ特性の異常を検出する方法であっ
て、g1=gmが成立する。According to claim 5 of the present invention,
The method for detecting an abnormality in the γ characteristic according to claim 4, wherein g 1 = g m is established.
【0012】この発明のうち請求項6にかかるものは、
請求項1に記載のγ特性の異常を検出する方法であっ
て、(e)R(赤)、G(緑)、B(青)の三色につい
ての階調値の組(r,g,b)に基づいて表示デバイス
にカラー表示をさせる工程と、(f)前記工程(e)で
得られた前記カラー表示の輝度を測定する工程とを更に
備える。そして、前記工程(e),(f)は前記階調値
の組の値を(r0,g0,b1),(r0,g0,b2),
(r0,g0,b3)として繰り返し実行される(但し、
rm≦r0≦rM,gm≦g0≦gM,bm≦b1<b3)。更
に、(g)前記階調値の組(r0,g0,b1),(r0,
g0,b2)における前記輝度から、前記階調値の組(r
0,g0,b3)における理論的な輝度を求める工程と、
(h)前記階調値の組(r0,g0,b3)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを備える。According to claim 6 of the present invention,
A method for detecting an abnormality in the γ characteristic according to claim 1, wherein a set of gradation values (r, g, R) for three colors of (e) R (red), G (green), and B (blue). The method further comprises the steps of causing a display device to perform color display based on b), and (f) measuring the brightness of the color display obtained in step (e). Then, in the steps (e) and (f), the values of the set of gradation values are (r 0 , g 0 , b 1 ), (r 0 , g 0 , b 2 ),
(R 0 , g 0 , b 3 ) is repeatedly executed (however,
r m ≤r 0 ≤r M , g m ≤g 0 ≤g M , b m ≤b 1 <b 3 ). Further, (g) the set of gradation values (r 0 , g 0 , b 1 ), (r 0 ,
From the luminance at g 0 , b 2 ), the set of gradation values (r
0 , g 0 , b 3 ) to obtain a theoretical brightness at
(H) Compare the luminance obtained in the step (f) and the theoretical luminance obtained in the step (g) for the set of gradation values (r 0 , g 0 , b 3 ). And a step of performing.
【0013】この発明のうち請求項7にかかるものは、
請求項6に記載のγ特性の異常を検出する方法であっ
て、b1=bmが成立する。According to claim 7 of the present invention,
A method for detecting an abnormality in the γ characteristic according to claim 6, wherein b 1 = b m is established.
【0014】この発明のうち請求項8にかかるものは、
請求項1に記載のγ特性の異常を検出する方法であっ
て、(e)R(赤)、G(緑)、B(青)の三色につい
ての階調値の組(r,g,b)に基づいて表示デバイス
にカラー表示をさせる工程と、(f)前記工程(e)で
得られた前記カラー表示の輝度を測定する工程とを更に
備える。そして、前記工程(e),(f)は前記階調値
の組の値を(r1,g1,b1),(r2,g1,b1),
(r3,g1,b1),(r1,g2,b1),(r1,g3,
b1),(r1,g1,b2),(r1,g1,b3)として
繰り返し実行される。更に、(g)前記階調値の組(r
1,g1,b1),(r2,g1,b1)における前記輝度か
ら、前記階調値の組(r3,g1,b1)における理論的
な輝度を求める工程と、(h)前記階調値の組(r3,
g1,b1)について前記工程(f)で得られた前記輝度
と、前記工程(g)で得られた前記理論的な輝度とを比
較する工程と、(i)前記階調値の組(r1,g1,
b1),(r1,g2,b1)における前記輝度から、前記
階調値の組(r1,g3,b1)における理論的な輝度を
求める工程と、(j)前記階調値の組(r1,g3,
b1)について前記工程(f)で得られた前記輝度と、
前記工程(i)で得られた前記理論的な輝度とを比較す
る工程と、(k)前記階調値の組(r1,g1,b1),
(r1,g1,b2)における前記輝度から、前記階調値
の組(r1,g1,b3)における理論的な輝度を求める
工程と、(l)前記階調値の組(r1,g1,b3)につ
いて前記工程(f)で得られた前記輝度と、前記工程
(k)で得られた前記理論的な輝度とを比較する工程と
を備える。According to claim 8 of the present invention,
A method for detecting an abnormality in the γ characteristic according to claim 1, wherein a set of gradation values (r, g, R) for three colors of (e) R (red), G (green), and B (blue). The method further comprises the steps of causing a display device to perform color display based on b), and (f) measuring the brightness of the color display obtained in step (e). Then, in the steps (e) and (f), the values of the gradation value set are (r 1 , g 1 , b 1 ), (r 2 , g 1 , b 1 ),
(R 3 , g 1 , b 1 ), (r 1 , g 2 , b 1 ), (r 1 , g 3 ,
b 1 ), (r 1 , g 1 , b 2 ), (r 1 , g 1 , b 3 ) are repeatedly executed. Further, (g) the set of gradation values (r
A step of obtaining a theoretical brightness in the set of gradation values (r 3 , g 1 , b 1 ) from the brightness in 1 , g 1 , b 1 ), (r 2 , g 1 , b 1 ), (H) The set of gradation values (r 3 ,
g 1 , b 1 ) comparing the luminance obtained in the step (f) with the theoretical luminance obtained in the step (g), and (i) a set of the gradation values. (R 1 , g 1 ,
b 1), (r 1, g 2, b 1 from the luminance in), a step of determining the theoretical luminance of the set of tone values (r 1, g 3, b 1), (j) the floor A set of key values (r 1 , g 3 ,
b 1 ) the luminance obtained in the step (f), and
Comparing the theoretical brightness obtained in step (i) with (k) the set of gradation values (r 1 , g 1 , b 1 ),
A step of obtaining theoretical brightness in the set of gradation values (r 1 , g 1 , b 3 ) from the brightness in (r 1 , g 1 , b 2 ); and (l) a set of gradation values A step of comparing the luminance obtained in the step (f) with respect to (r 1 , g 1 , b 3 ) and the theoretical luminance obtained in the step (k).
【0015】この発明のうち請求項9にかかるものは、
請求項8に記載のγ特性の異常を検出する方法であっ
て、r1=rm,g1=gm,b1=bmが成立する。According to claim 9 of the present invention,
The method for detecting an abnormality in the γ characteristic according to claim 8, wherein r 1 = r m , g 1 = g m , and b 1 = b m are established.
【0016】この発明のうち請求項10にかかるもの
は、請求項1乃至請求項8のいずれか一つに記載のγ特
性の異常を検出する方法であって、r2=rM,g2=
gM,b2=bMが成立する。According to a tenth aspect of the present invention, there is provided a method for detecting an abnormality in the γ characteristic according to any one of the first to eighth aspects, wherein r 2 = r M , g 2 =
g M , b 2 = b M holds.
【0017】[0017]
【発明の実施の形態】図1は、本発明を実施可能な構成
を表すブロック図である。モニタ11は、γ特性の異常
検出の対象であり、例えば液晶素子を用いた表示デバイ
スである。信号源13は、パーソナルコンピュータ(図
中ではPCと表記)を典型とする制御・演算部14から
制御信号を受け、これに基づいて、所定の階調値を有す
る映像信号をモニタ11へと送出する。輝度計2はモニ
タ11に表示された画面から得られる輝度21を測定す
る。輝度計2の測定は、制御・演算部14から受ける制
御信号に基づいて行われ、制御・演算部14に対しては
測定データを与える。制御・演算部14は信号源13を
制御してモニタ11に表示させるべき所定の階調値と、
輝度計2から送られてくる測定データとに基づいて、γ
特性の正常/異常の判定を行う。1 is a block diagram showing a configuration in which the present invention can be implemented. The monitor 11 is a target for the abnormality detection of the γ characteristic, and is, for example, a display device using a liquid crystal element. The signal source 13 receives a control signal from a control / arithmetic unit 14 typified by a personal computer (indicated as PC in the drawing), and based on this, sends a video signal having a predetermined gradation value to the monitor 11. To do. The luminance meter 2 measures the luminance 21 obtained from the screen displayed on the monitor 11. The measurement of the luminance meter 2 is performed based on the control signal received from the control / calculation unit 14, and the measurement data is given to the control / calculation unit 14. The control / arithmetic unit 14 controls the signal source 13 to display a predetermined gradation value on the monitor 11,
Based on the measurement data sent from the luminance meter 2, γ
Determine whether the characteristics are normal or abnormal.
【0018】なお、本実施の形態ではモニタ11の映像
信号入力インターフェースをアナログインターフェース
と仮定し、信号源13の出力もアナログRGB映像信号
であるとして説明する。モニタ11の入力インターフェ
ースがディジタルインターフェースであり、信号源13
の出力がディジタルであっても、本発明を適用すること
ができる。In the present embodiment, it is assumed that the video signal input interface of the monitor 11 is an analog interface and the output of the signal source 13 is also an analog RGB video signal. The input interface of the monitor 11 is a digital interface, and the signal source 13
The present invention can be applied even if the output of is digital.
【0019】さて、Grassmannの比例則とは、ある色光
の強度を[F1]、[F2]、[F3]、[F4]とし、式
(1)が成立している場合に式(2)が成立することを
いう。Now, according to the Grassmann's proportional law, the intensities of certain color lights are [F1], [F2], [F3], and [F4], and when the equation (1) is satisfied, It means to be established.
【0020】[0020]
【数1】 [Equation 1]
【0021】[0021]
【数2】 [Equation 2]
【0022】またGrassmannの加法則とは、式(1)が
成立している場合に式(3)が成立することをいう。The Grassmann's addition law means that the equation (3) holds when the equation (1) holds.
【0023】[0023]
【数3】 [Equation 3]
【0024】本実施の形態では、Grassmannの比例則及
び加法則がモニタ11において成立しない場合と、成立
する場合との二通りに分けて説明する。In the present embodiment, the description will be divided into two cases, that is, the case where the Grassmann proportional law and the additive law are not established in the monitor 11 and the case where they are established.
【0025】実施の形態1(モニタ11においてGrassm
annの比例則及び加法則が成立しない場合):R
(赤)、G(緑)、B(青)の階調値がそれぞれ値r,
g,bを採る場合の輝度をC(r,g,b)で表す。R
(赤)、G(緑)、B(青)のそれぞれの色におけるγ
特性の異常検出のうち、R(赤)を例に採って、γ特性
の異常を検出する方法について説明する。First Embodiment (Grassm in Monitor 11)
If the proportional and additive laws of ann do not hold): R
The gradation values of (red), G (green), and B (blue) are the values r,
The luminance when g and b are taken is represented by C (r, g, b). R
Γ for each color of (red), G (green), and B (blue)
Of the characteristic abnormality detection, taking R (red) as an example, a method for detecting the abnormality in the γ characteristic will be described.
【0026】第1の工程として、まず制御・演算部14
から信号源13に制御信号を与え、R(赤)、G
(緑)、B(青)の階調値が後述する所定の値の組を採
る映像信号を信号源13に出力させる。モニタ11は当
該映像信号を受けて、これに対応したカラー表示を行
う。As the first step, first, the control / calculation unit 14
Control signal to the signal source 13 from R (red), G
The signal source 13 is caused to output a video signal in which the gradation values of (green) and B (blue) take a set of predetermined values described later. The monitor 11 receives the video signal and performs color display corresponding to the video signal.
【0027】第2の工程として、制御・演算部14は測
色計12に制御信号を与え、モニタ11のカラー表示の
輝度を測色計12に測定させる。測色計12は輝度を測
定して得られた結果である測定データを制御・演算部1
4に与える。In the second step, the control / calculation unit 14 gives a control signal to the colorimeter 12 to cause the colorimeter 12 to measure the brightness of the color display on the monitor 11. The colorimeter 12 controls and calculates the measurement data, which is the result obtained by measuring the brightness.
Give to 4.
【0028】第1の工程及び第2の工程は、G(緑)、
B(青)の階調値g,bをそれぞれ値g0,b0に固定し
て、R(赤)の階調値rを変えて数種実行される。具体
的には値r1,r2,r3,b0,g0を用いて、階調値の
組(r,g,b)として(r1,g0,b0),(r2,g
0,b0),(r3,g0,b0)を採用し、第1及び第2
の工程が繰り返して実行される。但し、階調値rの最小
値をrm、最大値をrMとし、階調値bの最小値をbm、
最大値をbMとし、階調値bの最小値をbm、最大値をb
Mとし、式(4)の関係がある。The first step and the second step are G (green),
The B (blue) gradation values g and b are fixed to the values g 0 and b 0 , respectively, and the R (red) gradation value r is changed to be executed several kinds. Specifically, by using the values r 1 , r 2 , r 3 , b 0 , g 0 , (r 1 , g 0 , b 0 ), (r 2 ) as a set of gradation values (r, g, b). , G
0 , b 0 ), (r 3 , g 0 , b 0 ), the first and second
The process of is repeatedly executed. However, the minimum value of the gradation value r is r m , the maximum value is r M, and the minimum value of the gradation value b is b m ,
Let b M be the maximum value, b m be the minimum value of gradation value b, and b be the maximum value.
Let M be the relationship of equation (4).
【0029】[0029]
【数4】 [Equation 4]
【0030】第3の工程として、R(赤)、G(緑)、
B(青)の階調値の組が(r3,b0,b0)である場合
の理論的な輝度C’(r3,g0,b0)を、実測された
輝度C(r1,g0,b0),C(r2,g0,b0)を用い
て式(5)で求める。但しR(赤)のγ特性において、
輝度Cの変化が階調値rの変化のα乗に比例する調整が
なされていた場合(いわゆるγ値がαを採る場合)を想
定している。As the third step, R (red), G (green),
The theoretical brightness C ′ (r 3 , g 0 , b 0 ) in the case where the set of gradation values of B (blue) is (r 3 , b 0 , b 0 ) is the measured brightness C (r 1 , g 0 , b 0 ), C (r 2 , g 0 , b 0 ) are used to obtain by the equation (5). However, in the γ characteristic of R (red),
It is assumed that the change of the luminance C is adjusted in proportion to the change α of the change of the gradation value r (the so-called γ value takes α).
【0031】[0031]
【数5】 [Equation 5]
【0032】第4の工程として、実測された輝度C(r
3,g0,b0)と理論的な輝度C’(r3,g0,b0)と
を比較する。具体的には式(6)が成立する場合にはR
(赤)のγ特性は正常であると判定する。ここでβ1は
予め設定された許容差である。As the fourth step, the actually measured luminance C (r
3 , g 0 , b 0 ) is compared with the theoretical luminance C ′ (r 3 , g 0 , b 0 ). Specifically, when the equation (6) is satisfied, R
It is determined that the (red) γ characteristic is normal. Here, β 1 is a preset tolerance.
【0033】[0033]
【数6】 [Equation 6]
【0034】G(緑)、B(青)についても同様に第1
乃至第4の工程を行い、γ特性の異常を検出することが
できる。具体的には式(7)を満足する値r0,g1,g
2,g3,b1,b2,b3を更に導入する。そして階調値
の組(r,g,b)として(r0,g1,b0),(r0,
g2,b0),(r0,g3,b0)を採用してG(緑)の
γ特性の異常を検出できる。そして階調値の組(r,
g,b)として(r0,g0,b1),(r0,g0,
b2),(r0,g0,b3)を採用してB(青)のγ特性
の異常を検出できる。従って、R(赤)、G(緑)、B
(青)について各々3種ずつ、合計9種の階調値の組に
ついての輝度測定が行われる。The same applies to G (green) and B (blue).
Through the fourth step, it is possible to detect an abnormality in the γ characteristic. Specifically, the values r 0 , g 1 , g satisfying the expression (7) are
2 , g 3 , b 1 , b 2 , b 3 are further introduced. Then, as a set of gradation values (r, g, b), (r 0 , g 1 , b 0 ), (r 0 ,
By using g 2 , b 0 ), (r 0 , g 3 , b 0 ), it is possible to detect an abnormality in the γ characteristic of G (green). Then, a set of gradation values (r,
g, b) as (r 0 , g 0 , b 1 ), (r 0 , g 0 ,
By using b 2 ), (r 0 , g 0 , b 3 ), it is possible to detect an abnormality in the γ characteristic of B (blue). Therefore, R (red), G (green), B
Luminance measurement is performed for each set of nine gradation values, three for each (blue).
【0035】[0035]
【数7】 [Equation 7]
【0036】但し式(8)が成立すれば、階調値の組
(r1,g1,b1)をR(赤)、G(緑)、B(青)の
いずれのγ特性の判定にも共用できるので、輝度測定は
7種の階調値の組に対して行えば足りる。However, if the equation (8) is satisfied, the set of gradation values (r 1 , g 1 , b 1 ) is judged for any γ characteristic of R (red), G (green) and B (blue). Since it can be commonly used, it is sufficient to measure the luminance for a set of 7 gradation values.
【0037】[0037]
【数8】 [Equation 8]
【0038】実施の形態2(モニタ11においてGrassm
annの比例則及び加法則が成立する場合):実施の形態
1の第1の工程と同様にして、R(赤)、G(緑)、B
(青)のある階調値に対応した映像信号を信号源13に
出力させる。モニタ11は当該映像信号を受けて、これ
に対応したカラー表示を行う。Second Embodiment (Grassm in Monitor 11)
If the ann proportional law and the addition law are satisfied): R (red), G (green), B in the same manner as in the first step of the first embodiment.
A video signal corresponding to a certain gradation value of (blue) is output to the signal source 13. The monitor 11 receives the video signal and performs color display corresponding to the video signal.
【0039】第2の工程では、制御・演算部14は測色
計12に制御信号を与え、モニタ11のカラー表示のX
YZ刺激値を測色計12に測定させる。測色計12はX
YZ刺激値を測定して得られた結果である測定データを
制御・演算部14に与える。第1の工程及び第2の工程
は、R(赤)、G(緑)、B(青)の階調値を変えて数
種実行される。例えばR(赤)、G(緑)、B(青)の
階調値の組(r,g,b)として、(rm,gm,
bm),(r2,gm,bm),(rm,g2,bm),
(rm,gm,b2),(r3,g3,b3)の5個の組につ
いてそれぞれ第1の工程及び第2の工程が実行される。In the second step, the control / arithmetic unit 14 gives a control signal to the colorimeter 12, and the color display X on the monitor 11 is performed.
The YZ stimulus value is measured by the colorimeter 12. Colorimeter 12 is X
Measurement data, which is the result obtained by measuring the YZ stimulus value, is given to the control / calculation unit 14. The first step and the second step are executed by changing the gradation values of R (red), G (green), and B (blue) by several kinds. For example, as a set (r, g, b) of gradation values of R (red), G (green), and B (blue), (r m , g m ,
b m ), (r 2 , g m , b m ), (r m , g 2 , b m ),
The first step and the second step are executed for each of the five groups (r m , g m , b 2 ) and (r 3 , g 3 , b 3 ).
【0040】R(赤)のγ特性においては刺激値Xの変
化が階調値rの変化のξ乗に比例する(いわゆるγ値が
ξを採る)調整がなされ、G(緑)のγ特性においては
刺激値Yの変化が階調値gの変化のη乗に比例する(い
わゆるγ値がηを採る)調整がなされ、B(青)のγ特
性においては刺激値Zの変化が階調値bの変化のζ乗に
比例する(いわゆるγ値がζを採る)調整がなされてい
た場合を想定する。階調値の組が(r、g、b)である
場合のXYZ刺激値を、X(r,g,b),Y(r,
g,b),Z(r,g,b)で表す。In the γ characteristic of R (red), the change of the stimulation value X is adjusted in proportion to the ξ power of the change of the gradation value r (so-called γ value takes ξ), and the γ characteristic of G (green) is adjusted. Is adjusted so that the change of the stimulus value Y is proportional to the η power of the change of the gradation value g (so-called γ value takes η), and in the γ characteristic of B (blue), the change of the stimulus value Z is the gradation. It is assumed that the adjustment is made in proportion to the change of the value b to the power of ζ (so-called γ value takes ζ). The XYZ stimulus values when the set of gradation values is (r, g, b) are X (r, g, b), Y (r,
g, b) and Z (r, g, b).
【0041】第3の工程では、階調値r,g,bがそれ
ぞれ値r3,g3,b3を採る場合のxy色度値の理論値
を求める。まずR(赤)、G(緑)、B(青)の階調値
の組が(r3,gm,bm)である場合の刺激値につい
て、理論値X’(r3,gm,bm)が実測値X(rm,g
m,bm),X(r2,gm,bm)を用いて式(9)で,
理論値Y’(r3,gm,bm)が実測値Y(rm,gm,
bm),Y(r2,gm,bm)を用いて式(10)で、理
論値Z’(r3,gm,bm)が実測値Z(rm,gm,
bm),Z(r2,gm,bm)を用いて式(11)で、そ
れぞれ求められる。In the third step, theoretical values of the xy chromaticity values are calculated when the gradation values r, g, b take the values r 3 , g 3 , b 3 , respectively. First, for the stimulus value when the set of gradation values of R (red), G (green), and B (blue) is (r 3 , g m , b m ), the theoretical value X ′ (r 3 , g m , B m ) is the measured value X (r m , g
m , b m ), X (r 2 , g m , b m ) in equation (9),
The theoretical value Y '(r 3 , g m , b m ) is the measured value Y (r m , g m ,
b m ), Y (r 2 , g m , b m ), the theoretical value Z ′ (r 3 , g m , b m ) is the measured value Z (r m , g m ,
b m ), Z (r 2 , g m , b m ), and are respectively obtained by the equation (11).
【0042】[0042]
【数9】 [Equation 9]
【0043】[0043]
【数10】 [Equation 10]
【0044】[0044]
【数11】 [Equation 11]
【0045】次にR(赤)、G(緑)、B(青)の階調
値の組が(rm,g3,bm)である場合の刺激値につい
て、理論値X’(rm,g3,bm)が実測値X(rm,g
m,bm),X(rm,g2,bm)を用いて式(12)
で,理論値Y’(rm,g3,b m)が実測値Y(rm,g
m,bm),Y(rm,g2,bm)を用いて式(13)
で、理論値Z’(rm,g3,bm)が実測値Z(rm,g
m,bm),Z(rm,g2,bm)を用いて式(14)
で、それぞれ求められる。Next, gradations of R (red), G (green) and B (blue)
The set of values is (rm, G3, Bm) About the stimulus value
The theoretical value X '(rm, G3, Bm) Is the measured value X (rm, G
m, Bm), X (rm, G2, Bm) Using equation (12)
And the theoretical value Y '(rm, G3, B m) Is the measured value Y (rm, G
m, Bm), Y (rm, G2, Bm) Using equation (13)
And the theoretical value Z '(rm, G3, Bm) Is the measured value Z (rm, G
m, Bm), Z (rm, G2, Bm) Using equation (14)
And each is required.
【0046】[0046]
【数12】 [Equation 12]
【0047】[0047]
【数13】 [Equation 13]
【0048】[0048]
【数14】 [Equation 14]
【0049】次にR(赤)、G(緑)、B(青)の階調
値の組が(rm,gm,b3)である場合の刺激値につい
て、理論値X’(rm,gm,b3)が実測値X(rm,g
m,bm),X(rm,gm,b2)を用いて式(15)
で,理論値Y’(rm,gm,b 3)が実測値Y(rm,g
m,bm),Y(rm,gm,b2)を用いて式(16)
で、理論値Z’(rm,gm,b3)が実測値Z(rm,g
m,bm),Z(rm,gm,b2)を用いて式(17)
で、それぞれ求められる。Next, gradations of R (red), G (green) and B (blue)
The set of values is (rm, Gm, B3) About the stimulus value
The theoretical value X '(rm, Gm, B3) Is the measured value X (rm, G
m, Bm), X (rm, Gm, B2) Using equation (15)
And the theoretical value Y '(rm, Gm, B 3) Is the measured value Y (rm, G
m, Bm), Y (rm, Gm, B2) Using equation (16)
And the theoretical value Z '(rm, Gm, B3) Is the measured value Z (rm, G
m, Bm), Z (rm, Gm, B2) Using equation (17)
And each is required.
【0050】[0050]
【数15】 [Equation 15]
【0051】[0051]
【数16】 [Equation 16]
【0052】[0052]
【数17】 [Equation 17]
【0053】Grassmannの加法則に基づき、R(赤)、
G(緑)、B(青)の階調値の組が(r3,g3,b3)
である場合の刺激値について、理論値X’(r3,g3,
b3)は理論値X’(r3,gm,bm),X’(rm,
g3,bm),X’(rm,gm,b 3)を用いて式(1
8)で、理論値Y’(r3,g3,b3)は理論値Y’
(r3,gm,bm),Y’(rm,g3,bm),Y’(r
m,gm,b3)を用いて式(19)で、理論値Z’
(r3,g3,b3)は理論値Z’(r3,gm,bm),
Z’(r m,g3,bm),Z’(rm,gm,b3)を用い
て式(20)で、それぞれ求められる。Based on Grassmann's addition law, R (red),
The set of G (green) and B (blue) gradation values is (r3, G3, B3)
The theoretical value X '(r3, G3,
b3) Is the theoretical value X '(r3, Gm, Bm), X '(rm,
g3, Bm), X '(rm, Gm, B 3) Using the formula (1
8), the theoretical value Y ′ (r3, G3, B3) Is the theoretical value Y '
(R3, Gm, Bm), Y '(rm, G3, Bm), Y '(r
m, Gm, B3) Using equation (19), the theoretical value Z '
(R3, G3, B3) Is the theoretical value Z '(r3, Gm, Bm),
Z '(r m, G3, Bm), Z '(rm, Gm, B3) Is used
Equation (20) is used to obtain each.
【0054】[0054]
【数18】 [Equation 18]
【0055】[0055]
【数19】 [Formula 19]
【0056】[0056]
【数20】 [Equation 20]
【0057】と求められる。Is calculated.
【0058】更に、R(赤)、G(緑)、B(青)の階
調値の組が(r3,g3,b3)である場合のxy色度値
の理論値x’(r3,g3,b3),y’(r3,g3,
b3)は、それぞれ式(21),(22)で求められ
る。Further, the theoretical value x '(of the xy chromaticity value when the set of gradation values of R (red), G (green) and B (blue) is (r 3 , g 3 , b 3 ). r 3, g 3, b 3 ), y '(r 3, g 3,
b 3) are each formula (21) obtained in (22).
【0059】[0059]
【数21】 [Equation 21]
【0060】[0060]
【数22】 [Equation 22]
【0061】一方、R(赤)、G(緑)、B(青)の階
調値の組が(r3,g3,b3)である場合の三刺激値の
実測値X(r3,g3,b3),Y(r3,g3,b3),Z
(r 3,g3,b3)が得られているので、実測に基づい
た色度値x(r3,g3,b3),y(r3,g3,b3)
が、それぞれ式(23),(24)で求められる。On the other hand, floors of R (red), G (green), B (blue)
The set of key values is (r3, G3, B3) Of the tristimulus values
Measured value X (r3, G3, B3), Y (r3, G3, B3), Z
(R 3, G3, B3) Has been obtained,
Chromaticity value x (r3, G3, B3), Y (r3, G3, B3)
Are calculated by equations (23) and (24), respectively.
【0062】[0062]
【数23】 [Equation 23]
【0063】[0063]
【数24】 [Equation 24]
【0064】そして第4の工程で、理論値x’(r3,
g3,b3),y’(r3,g3,b3)をそれぞれ実測に
基づいた色度値x’(r3,g3,b3),y’(r3,g
3,b3)と比較して、γ特性の異常を検出することがで
きる。具体的には例えば式(25)が成立する場合には
γ特性は正常であると判定する。ここでβ2は予め設定
された許容差である。Then, in the fourth step, the theoretical value x '(r 3 ,
g 3, b 3), y '(r 3, g 3, b 3) the chromaticity value x based on the measured respective' (r 3, g 3, b 3), y '(r 3, g
3, b 3) in comparison with, it is possible to detect the abnormality of the γ characteristics. Specifically, for example, when the expression (25) is satisfied, it is determined that the γ characteristic is normal. Here, β 2 is a preset tolerance.
【0065】[0065]
【数25】 [Equation 25]
【0066】以上のようにして、Grassmannの比例・加法
則が成立する場合には実施の形態2で説明した手法を用
いて、合計5種だけの階調値の組についての刺激値を測
定すればγ特性の異常の判定を行うことができる。各色
個別のγ特性の異常を判定するには適当ではないが、簡
易にγ特性の異常の判定を行うことができる。As described above, when the Grassmann proportional-addition law is established, the stimulus values for a total of only five types of gradation values can be measured using the method described in the second embodiment. For example, it is possible to determine an abnormality in the γ characteristic. Although it is not suitable for determining the abnormality of the γ characteristic for each color, it is possible to easily determine the abnormality of the γ characteristic.
【0067】なお、γ特性の判定の精度を上げるために
は、値r1,r2,r3の相互の差を大きくすることが望
ましい。従って、値r1としては階調値の最小値rmを、
値r 2としては階調値の最大値rMを、値r3としては値
rm,rMの和の半分程度の値を、それぞれ採ることが望
ましい。値g1,g2,g3,b1,b2,b3についても同
様である。モニタ内での信号処理をR(赤)、G
(緑)、B(青)の三色について、それぞれ8ビットの
ディジタル信号である場合を例にとれば、例えば値
r 0,r1,g0,g1,b0,b1は値0を、値r2,g2,
b2は値255を、値r3,g3,b3は値128を、それ
ぞれ採用することができる。In order to improve the accuracy of the γ characteristic determination,
Is the value r1, R2, R3Hope to increase the difference between
Good Therefore, the value r1Is the minimum gradation value rmTo
Value r 2Is the maximum gradation value rMWith the value r3As the value
rm, RMIt is desirable to take about half the value of
Good Value g1, G2, G3, B1, B2, B3Also about
It is like. Signal processing in the monitor is R (red), G
For each of the three colors (green) and B (blue),
Taking a digital signal as an example, for example, the value
r 0, R1, G0, G1, B0, B1Value 0, value r2, G2,
b2Value 255, value r3, G3, B3Gives the value 128
Each can be adopted.
【0068】また判定に用いる階調値の数を増やせば異
常検出の精度を向上させることができる。If the number of gradation values used for the determination is increased, the accuracy of abnormality detection can be improved.
【0069】また、意図的にγ特性の変換処理を行って
いない場合にも、表示デバイスそのもののγ特性のバラ
ツキや異常の検出が可能であることはいうまでもない。Needless to say, even if the conversion process of the γ characteristic is not intentionally performed, it is possible to detect the variation or abnormality of the γ characteristic of the display device itself.
【0070】[0070]
【発明の効果】この発明のうち請求項1にかかるγ特性
の異常を検出する方法によれば、Grassmannの加法・比
例則が成立する場合にγ特性の異常を簡易に検出するこ
とができる。According to the method of detecting an abnormality in the γ characteristic according to the first aspect of the present invention, the abnormality in the γ characteristic can be easily detected when the Grassmann's additive / proportional law is established.
【0071】この発明のうち請求項2にかかるγ特性の
異常を検出する方法によれば、Grassmannの加法・比例
則が成立しない場合でも、R(赤)のγ特性の異常を簡
易に検出することができる。According to the method for detecting an abnormality in the γ characteristic according to claim 2 of the present invention, the abnormality in the γ characteristic of R (red) can be easily detected even if the Grassmann's additive / proportional law is not established. be able to.
【0072】この発明のうち請求項3にかかるγ特性の
異常を検出する方法によれば、γ特性の異常を精度良く
検出することができる。According to the method of detecting the abnormality in the γ characteristic according to the third aspect of the present invention, the abnormality in the γ characteristic can be detected with high accuracy.
【0073】この発明のうち請求項4にかかるγ特性の
異常を検出する方法によれば、Grassmannの加法・比例
則が成立しない場合でも、G(緑)のγ特性の異常を簡
易に検出することができる。According to the method of detecting an abnormality in the γ characteristic according to claim 4 of the present invention, the abnormality in the γ characteristic of G (green) can be easily detected even when the Grassmann's additive / proportional law is not established. be able to.
【0074】この発明のうち請求項5にかかるγ特性の
異常を検出する方法によれば、γ特性の異常を精度良く
検出することができる。According to the method for detecting the abnormality in the γ characteristic according to the fifth aspect of the present invention, the abnormality in the γ characteristic can be detected with high accuracy.
【0075】この発明のうち請求項6にかかるγ特性の
異常を検出する方法によれば、Grassmannの加法・比例
則が成立しない場合でも、B(青)のγ特性の異常を簡
易に検出することができる。According to the method of detecting an abnormality in the γ characteristic according to the sixth aspect of the present invention, even if the Grassmann's additive / proportional law does not hold, the abnormality in the γ characteristic of B (blue) is easily detected. be able to.
【0076】この発明のうち請求項7にかかるγ特性の
異常を検出する方法によれば、γ特性の異常を精度良く
検出することができる。According to the method of detecting an abnormality in the γ characteristic according to the seventh aspect of the present invention, the abnormality in the γ characteristic can be detected with high accuracy.
【0077】この発明のうち請求項8にかかるγ特性の
異常を検出する方法によれば、Grassmannの加法・比例
則が成立しない場合でも、R(赤)、G(緑)、B
(青)の三色についてのγ特性の異常を簡易に、かつ測
定する階調値の組の数を少なくして検出することができ
る。According to the method for detecting an abnormality in the γ characteristic according to claim 8 of the present invention, R (red), G (green), and B (green) even if the Grassmann addition / proportionality law is not established.
Abnormalities in the γ characteristic for the three colors of (blue) can be easily detected by reducing the number of gradation value sets to be measured.
【0078】この発明のうち請求項9にかかるγ特性の
異常を検出する方法によれば、γ特性の異常を精度良く
検出することができる。According to the method for detecting the abnormality in the γ characteristic according to the ninth aspect of the present invention, the abnormality in the γ characteristic can be detected with high accuracy.
【0079】この発明のうち請求項10にかかるγ特性
の異常を検出する方法によれば、γ特性の異常を精度良
く検出することができる。According to the method of detecting an abnormality in the γ characteristic according to the tenth aspect of the present invention, the abnormality in the γ characteristic can be accurately detected.
【図1】 本発明を実施可能な構成を表すブロック図で
ある。FIG. 1 is a block diagram showing a configuration capable of implementing the present invention.
【図2】 従来の技術を示すブロック図である。FIG. 2 is a block diagram showing a conventional technique.
【図3】 従来の技術を示すグラフである。FIG. 3 is a graph showing a conventional technique.
11 モニタ、12 測色計、13 信号源、14 制
御・演算部。11 monitor, 12 colorimeter, 13 signal source, 14 control / arithmetic unit.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) G09G 3/20 642 G09G 3/20 642J 5C080 650 650M 5C082 670 670J 670N 670Q 3/36 3/36 5/00 5/00 X 5/02 5/02 B H04N 9/69 H04N 9/69 Fターム(参考) 2G020 AA08 DA02 DA03 DA04 DA05 DA15 DA65 2H088 FA12 HA06 MA13 2H093 NA51 NA61 NC13 NC14 NC49 NC54 NC65 ND06 ND24 ND56 ND58 NH18 5C006 AA21 AF46 AF53 BC16 EB01 FA18 GA02 5C066 AA03 AA15 BA20 CA17 EC05 GA01 GB01 KD01 KD06 KE01 KM13 LA02 5C080 AA10 BB05 CC03 DD03 DD14 DD29 EE29 EE30 JJ02 JJ05 KK02 5C082 AA01 BA34 BA35 BD01 BD02 CA11 CA81 CB05 CB08 EA20─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) G09G 3/20 642 G09G 3/20 642J 5C080 650 650M 5C082 670 670J 670N 670Q 3/36 3/36 5/00 5/00 X 5/02 5/02 B H04N 9/69 H04N 9/69 F term (reference) 2G020 AA08 DA02 DA03 DA04 DA05 DA15 DA65 2H088 FA12 HA06 MA13 2H093 NA51 NA61 NC13 NC14 NC49 NC54 NC65 ND06 ND24 ND56 ND58 NH18 5C006 AA21 AF46 AF53 BC16 EB01 FA18 GA02 5C066 AA03 AA15 BA20 CA17 EC05 GA01 GB01 KD01 KD06 KE01 KM13 LA02 5C080 AA10 BB05 CC03 DD03 DD14 DD29 EE29 EE30 JJ02 JJ05 KK02 5C082 AA01 BA34 BA11 CA08 CA20 CA20 BD20
Claims (10)
三色についての階調値の組(r,g,b)に基づいて表
示デバイスにカラー表示をさせる工程と、 (b)前記工程(a)で得られた前記カラー表示のXY
Z刺激値を測定する工程とを備え、 前記工程(a),(b)は前記階調値の組の値を
(rm,gm,bm),(r2,gm,bm),(rm,g2,
bm),(rm,gm,b2),(r3,g3,b3)として
繰り返し実行され(但し、R(赤)の階調値の最小値を
rm、最大値をrM、G(緑)の階調値の最小値をgm、
最大値をgM、B(青)の階調値の最小値をbm、最大値
をbMとし、rm<r3<r2≦rM,gm<g3<g2≦
gM,bm<b3<b2≦bM)、 (c)前記階調値の組(rm,gm,bm),(r2,
gm,bm),(rm,g2,bm),(rm,gm,b2)に
おける前記XYZ刺激値から、前記階調値の組(r 3,
g3,b3)における理論的なxy色度値を求める工程
と、 (d)前記階調値の組(r3,g3,b3)における前記
XYZ刺激値から、前記階調値の組(r3,g3,b3)
におけるxy色度値を求め、これを前記工程(c)で得
られた前記理論的なxy色度値値と比較する工程とを更
に備える、γ特性の異常を検出する方法。1. (a) R (red), G (green), B (blue)
Table based on the set of gradation values (r, g, b) for the three colors
The color display on the display device, (B) XY of the color display obtained in the step (a)
And a step of measuring a Z stimulus value, In the steps (a) and (b), the values of the gradation value set are
(Rm, Gm, Bm), (R2, Gm, Bm), (Rm, G2,
bm), (Rm, Gm, B2), (R3, G3, B3) As
Repeatedly executed (however, the minimum value of the gradation value of R (red) is
rm, The maximum value is rM, The minimum value of G (green) gradation value is gm,
Maximum value is gM, The minimum grayscale value of B (blue) is bm,Maximum value
BMAnd rm<R3<R2≤rM, Gm<G3<G2≤
gM, Bm<B3<B2≤bM), (C) The set of gradation values (rm, Gm, Bm), (R2,
gm, Bm), (Rm, G2, Bm), (Rm, Gm, B2) To
From the XYZ stimulus values in the set of gradation values (r 3,
g3, B3) To obtain a theoretical xy chromaticity value
When, (D) The set of gradation values (r3, G3, B3) In the above
From the XYZ stimulus values, the set of gradation values (r3, G3, B3)
And obtain the xy chromaticity value in step (c) above.
And comparing the calculated theoretical xy chromaticity value with
A method for detecting abnormality in the γ characteristic, which is provided for
三色についての階調値の組(r,g,b)に基づいて表
示デバイスにカラー表示をさせる工程と、 (f)前記工程(e)で得られた前記カラー表示の輝度
を測定する工程とを更に備え、 前記工程(e),(f)は前記階調値の組の値を
(r1,g0,b0),(r2,g0,b0),(r3,g0,
b0)として繰り返し実行され(但し、rm≦r1<r3,
gm≦g0≦gM,bm≦b0≦bM)、 (g)前記階調値の組(r1,g0,b0),(r2,
g0,b0)における前記輝度から、前記階調値の組(r
3,g0,b0)における理論的な輝度を求める工程と、 (h)前記階調値の組(r3,b0,g0)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを更に備え
る、請求項1に記載のγ特性の異常を検出する方法。2. A step of causing a display device to perform color display based on a set (r, g, b) of gradation values for three colors of (e) R (red), G (green) and B (blue). And (f) measuring the luminance of the color display obtained in the step (e), wherein the steps (e) and (f) are the values of the gradation value set (r 1 , G 0 , b 0 ), (r 2 , g 0 , b 0 ), (r 3 , g 0 ,
b 0 ), where r m ≤r 1 <r 3 ,
g m ≤g 0 ≤g M , b m ≤b 0 ≤b M ), (g) the set of gradation values (r 1 , g 0 , b 0 ), (r 2 ,
From the luminance at g 0 , b 0 ), the set of gradation values (r
3 , g 0 , b 0 ), and (h) the luminance obtained in the step (f) for the gradation value set (r 3 , b 0 , g 0 ). The method for detecting an abnormality in the γ characteristic according to claim 1, further comprising: comparing the theoretical brightness obtained in the step (g) with the theoretical brightness.
γ特性の異常を検出する方法。3. The method for detecting an abnormality in the γ characteristic according to claim 2, wherein r 1 = r m holds.
三色についての階調値の組(r,g,b)に基づいて表
示デバイスにカラー表示をさせる工程と、 (f)前記工程(e)で得られた前記カラー表示の輝度
を測定する工程とを更に備え、 前記工程(e),(f)は前記階調値の組の値を
(r0,g1,b0),(r0,g2,b0),(r0,g3,
b0)として繰り返し実行され(但し、rm≦r0≦rM,
gm≦g1<g3,bm≦b0≦bM)、 (g)前記階調値の組(r0,g1,b0),(r0,
g2,b0)における前記輝度から、前記階調値の組(r
0,g3,b0)における理論的な輝度を求める工程と、 (h)前記階調値の組(r0,g3,b0)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを更に備え
る、請求項1に記載のγ特性の異常を検出する方法。4. A step of causing a display device to perform color display based on a set (r, g, b) of gradation values for three colors of (e) R (red), G (green) and B (blue). And (f) measuring the brightness of the color display obtained in the step (e), wherein the steps (e) and (f) represent the value of the set of gradation values as (r 0 , G 1 , b 0 ), (r 0 , g 2 , b 0 ), (r 0 , g 3 ,
b 0 ), where r m ≤r 0 ≤r M ,
g m ≦ g 1 <g 3 , b m ≦ b 0 ≦ b M ), (g) the set of gradation values (r 0 , g 1 , b 0 ), (r 0 ,
From the luminance at g 2 , b 0 ), the set of gradation values (r
0 , g 3 , b 0 ) and (h) the luminance obtained in the step (f) for the set of gradation values (r 0 , g 3 , b 0 ). The method for detecting an abnormality in the γ characteristic according to claim 1, further comprising: comparing the theoretical brightness obtained in the step (g) with the theoretical brightness.
γ特性の異常を検出する方法。5. The method for detecting an abnormality in the γ characteristic according to claim 4, wherein g 1 = g m holds.
三色についての階調値の組(r,g,b)に基づいて表
示デバイスにカラー表示をさせる工程と、 (f)前記工程(e)で得られた前記カラー表示の輝度
を測定する工程とを更に備え、 前記工程(e),(f)は前記階調値の組の値を
(r0,g0,b1),(r0,g0,b2),(r0,g0,
b3)として繰り返し実行され(但し、rm≦r0≦rM,
gm≦g0≦gM,bm≦b1<b3)、 (g)前記階調値の組(r0,g0,b1),(r0,
g0,b2)における前記輝度から、前記階調値の組(r
0,g0,b3)における理論的な輝度を求める工程と、 (h)前記階調値の組(r0,g0,b3)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程とを更に備え
る、請求項1に記載のγ特性の異常を検出する方法。6. (e) A step of causing a display device to perform color display based on a set (r, g, b) of gradation values for three colors of R (red), G (green) and B (blue). And (f) measuring the brightness of the color display obtained in the step (e), wherein the steps (e) and (f) represent the value of the set of gradation values as (r 0 , G 0 , b 1 ), (r 0 , g 0 , b 2 ), (r 0 , g 0 ,
b 3 ), where r m ≤r 0 ≤r M ,
g m ≤g 0 ≤g M , b m ≤b 1 <b 3 ), (g) the set of gradation values (r 0 , g 0 , b 1 ), (r 0 ,
From the luminance at g 0 , b 2 ), the set of gradation values (r
0 , g 0 , b 3 ) and (h) the luminance obtained in the step (f) for the set of gradation values (r 0 , g 0 , b 3 ). The method for detecting an abnormality in the γ characteristic according to claim 1, further comprising: comparing the theoretical brightness obtained in the step (g) with the theoretical brightness.
γ特性の異常を検出する方法。7. The method for detecting an abnormality in the γ characteristic according to claim 6, wherein b 1 = b m holds.
三色についての階調値の組(r,g,b)に基づいて表
示デバイスにカラー表示をさせる工程と、 (f)前記工程(e)で得られた前記カラー表示の輝度
を測定する工程とを更に備え、 前記工程(e),(f)は前記階調値の組の値を
(r1,g1,b1),(r2,g1,b1),(r3,g1,
b1),(r1,g2,b1),(r1,g3,b1),
(r1,g1,b2),(r1,g1,b3)として繰り返し
実行され、 (g)前記階調値の組(r1,g1,b1),(r2,
g1,b1)における前記輝度から、前記階調値の組(r
3,g1,b1)における理論的な輝度を求める工程と、 (h)前記階調値の組(r3,g1,b1)について前記
工程(f)で得られた前記輝度と、前記工程(g)で得
られた前記理論的な輝度とを比較する工程と、 (i)前記階調値の組(r1,g1,b1),(r1,
g2,b1)における前記輝度から、前記階調値の組(r
1,g3,b1)における理論的な輝度を求める工程と、 (j)前記階調値の組(r1,g3,b1)について前記
工程(f)で得られた前記輝度と、前記工程(i)で得
られた前記理論的な輝度とを比較する工程と、 (k)前記階調値の組(r1,g1,b1),(r1,
g1,b2)における前記輝度から、前記階調値の組(r
1,g1,b3)における理論的な輝度を求める工程と、 (l)前記階調値の組(r1,g1,b3)について前記
工程(f)で得られた前記輝度と、前記工程(k)で得
られた前記理論的な輝度とを比較する工程とを更に備え
る、請求項1に記載のγ特性の異常を検出する方法。8. (e) A step of causing a display device to perform color display based on a set (r, g, b) of gradation values for three colors of R (red), G (green) and B (blue). And (f) measuring the luminance of the color display obtained in the step (e), wherein the steps (e) and (f) are the values of the gradation value set (r 1 , G 1 , b 1 ), (r 2 , g 1 , b 1 ), (r 3 , g 1 ,
b 1 ), (r 1 , g 2 , b 1 ), (r 1 , g 3 , b 1 ),
(R 1 , g 1 , b 2 ) and (r 1 , g 1 , b 3 ) are repeatedly executed, and (g) the set of gradation values (r 1 , g 1 , b 1 ), (r 2 ,
From the luminance at g 1 , b 1 ), the set of gradation values (r
3 , g 1 , b 1 ) to obtain a theoretical luminance, and (h) the luminance obtained in the step (f) for the set of gradation values (r 3 , g 1 , b 1 ) and , A step of comparing the theoretical brightness obtained in the step (g), and (i) a set of gradation values (r 1 , g 1 , b 1 ), (r 1 ,
From the luminance at g 2 , b 1 ), the set of gradation values (r
1 , g 3 , b 1 ) to obtain a theoretical luminance, and (j) the luminance obtained in the step (f) for the set of gradation values (r 1 , g 3 , b 1 ) and A step of comparing the theoretical luminance obtained in the step (i) with (k) a set of gradation values (r 1 , g 1 , b 1 ), (r 1 ,
From the luminance at g 1 , b 2 ), the set of gradation values (r
1 , g 1 , b 3 ) to obtain a theoretical luminance, and (l) the luminance obtained in the step (f) for the gradation value pair (r 1 , g 1 , b 3 ). The method for detecting an abnormality in the γ characteristic according to claim 1, further comprising: comparing the theoretical brightness obtained in the step (k) with the theoretical brightness.
る、請求項8に記載のγ特性の異常を検出する方法。9. The method for detecting an abnormality in the γ characteristic according to claim 8, wherein r 1 = r m , g 1 = g m , and b 1 = b m are established.
する、請求項1乃至請求項8のいずれか一つに記載のγ
特性の異常を検出する方法。10. The γ according to claim 1, wherein r 2 = r M , g 2 = g M , and b 2 = b M are established.
A method to detect characteristic abnormalities.
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