JP2002209230A - Color calibration device for display device and the display device - Google Patents
Color calibration device for display device and the display deviceInfo
- Publication number
- JP2002209230A JP2002209230A JP2000404904A JP2000404904A JP2002209230A JP 2002209230 A JP2002209230 A JP 2002209230A JP 2000404904 A JP2000404904 A JP 2000404904A JP 2000404904 A JP2000404904 A JP 2000404904A JP 2002209230 A JP2002209230 A JP 2002209230A
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- JP
- Japan
- Prior art keywords
- color temperature
- color
- display device
- standard
- tristimulus value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Image Processing (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Processing Of Color Television Signals (AREA)
- Color Image Communication Systems (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、表示装置の色校正
装置および表示装置に関し、さらに詳しくは、フィルタ
型測色手段が特定の標準色温度に準拠した三刺激値しか
算出できない場合でも表示装置の表示色を標準色温度以
外の表示色に校正できるようにした表示装置の色校正装
置および前記色校正に好適な表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color proofing device and a display device for a display device, and more particularly, to a display device even when a filter type colorimetric unit can calculate only tristimulus values based on a specific standard color temperature. The present invention relates to a color proofing device for a display device and a display device suitable for the color proofing, wherein the display color can be corrected to a display color other than the standard color temperature.
【０００２】[0002]
【従来の技術】図３は、従来の色校正装置の一例を示す
構成図である。この色校正装置５００は、ＣＲＴ（Ｃａ
ｔｈｏｄｅ Ｒａｙ Ｔｕｂｅ）装置などの表示装置５
１と、画面の三原色（赤，緑，青）の発光強度をそれぞ
れ検出するＲＧＢセンサ１０と、ＣＩＥ（国際照明委員
会）が規定する標準光源Ｄ（Ｄａｙｌｉｇｈｔ）６５の
色温度（６５００Ｋ）での分光感度を持つ分光型測色手
段で得られるべき標準色温度準拠三刺激値Ｘ（Ｄ６
５），Ｙ（Ｄ６５），Ｚ（Ｄ６５）を算出するフィルタ
型測色計５２０と、前記標準色温度準拠三刺激値に基づ
いて色校正を行うパソコン５０１とを具備して構成され
ている。2. Description of the Related Art FIG. 3 is a block diagram showing an example of a conventional color proofing device. This color proofing device 500 is a CRT (Ca
Display device 5 such as a side ray tube device
1, an RGB sensor 10 for detecting the emission intensities of the three primary colors (red, green, blue) of the screen, and a standard light source D (Daylight) 65 specified by the CIE (International Commission on Illumination) 65 at a color temperature (6500K). A standard color temperature-based tristimulus value X (D6) to be obtained by spectral colorimetric means having spectral sensitivity
5), a filter-type colorimeter 520 for calculating Y (D65) and Z (D65), and a personal computer 501 for performing color calibration based on the standard color temperature-based tristimulus values.
【０００３】次に、前記色校正装置５００による色校正
の動作について説明する。前記パソコン５０１の表示信
号出力部３１は、前記標準光源Ｄ６５に相当する白色
（昼光色）を表現する表示信号を前記表示装置５１へ出
力する。前記ＲＧＢセンサ１０は、赤色光を通す赤フィ
ルタ１１Ｒを透過した光を光検出素子１２Ｒで検出し、
緑色光を通す緑フィルタ１１Ｇを透過した光を光検出素
子１２Ｇで検出し、青色光を通す青フィルタ１１Ｂを透
過した光を光検出素子１２Ｂで検出し、各色に対応する
発光強度（ｒ，ｇ，ｂ）を前記フィルタ型測色計５２０
へ送る。Next, the operation of color proofing by the color proofing device 500 will be described. The display signal output unit 31 of the personal computer 501 outputs a display signal expressing white (daylight) corresponding to the standard light source D65 to the display device 51. The RGB sensor 10 detects light transmitted through a red filter 11R that transmits red light with a light detection element 12R,
The light transmitted through the green filter 11G that transmits green light is detected by the light detection element 12G, the light transmitted through the blue filter 11B that transmits blue light is detected by the light detection element 12B, and the light emission intensity (r, g) corresponding to each color is detected. , B) with the filter type colorimeter 520
Send to
【０００４】前記フィルタ型測色計５２０において、セ
ンサ三刺激値算出部２１は、前記発光強度（ｒ，ｇ，
ｂ）に基づいて、前記ＲＧＢセンサ１０の分光感度を反
映したセンサ三刺激値（Ｘ’，Ｙ’，Ｚ’）を算出す
る。次に、標準色温度準拠三刺激値演算部２３は、標準
色温度用換算係数格納部２２に格納された標準色温度用
換算係数を用いて、前記センサ三刺激値（Ｘ’，Ｙ’，
Ｚ’）を前記標準色温度準拠三刺激値Ｘ（Ｄ６５），Ｙ
（Ｄ６５），Ｚ（Ｄ６５）に換算し、前記パソコン５０
１へ出力する。なお、このような換算を行う理由は、測
色対象の光をプリズム（ｐｒｉｓｍ）や平面回折格子な
どの分光手段で多数の波長成分に分解して各波長成分の
強度を計測する分光型測色計を用いて得るべき絶対的な
色度すなわちＣＩＥ三刺激値を、フィルタ型測色計での
演算処理により簡便に得るためである。In the filter type colorimeter 520, the sensor tristimulus value calculating section 21 calculates the emission intensity (r, g,
Based on b), a sensor tristimulus value (X ′, Y ′, Z ′) reflecting the spectral sensitivity of the RGB sensor 10 is calculated. Next, the standard color temperature-based tristimulus value calculation unit 23 uses the standard color temperature conversion coefficient stored in the standard color temperature conversion coefficient storage unit 22 to calculate the sensor tristimulus values (X ′, Y ′,
Z ′) is converted to the standard color temperature-based tristimulus value X (D65), Y
(D65), Z (D65)
Output to 1. The reason why such conversion is performed is that the light to be measured is split into a number of wavelength components by a spectral means such as a prism or a plane diffraction grating, and the intensity of each wavelength component is measured. This is because the absolute chromaticity, that is, the CIE tristimulus value, which should be obtained by using a meter, can be easily obtained by a calculation process using a filter-type colorimeter.
【０００５】前記パソコン５０１において、白バランス
調整部３４は、前記標準色温度準拠三刺激値Ｘ（Ｄ６
５），Ｙ（Ｄ６５），Ｚ（Ｄ６５）が三刺激目標値格納
部３４に格納された三刺激目標値と一致するように前記
表示装置５１のゲインおよびバランスを調整すること
で、表示色を標準光源Ｄ６５に相当する白色に校正す
る。[0005] In the personal computer 501, the white balance adjusting section 34 is provided with the standard color temperature-based tristimulus value X (D6
5) The display color is adjusted by adjusting the gain and balance of the display device 51 so that Y (D65) and Z (D65) match the tristimulus target values stored in the tristimulus target value storage unit 34. Calibrate to white light equivalent to standard light source D65.
【０００６】[0006]
【発明が解決しようとする課題】上記従来の色校正装置
５００では、標準光源Ｄ６５とは異なる色温度を基準と
して表示装置５１の白バランスを調整したい場合に対応
し難い問題点がある。例えば、放送用のモニタや市販の
ディスプレイでは光源Ｄ９３（色温度９３００Ｋに相当
する青っぽい白色）を基準として調整し、印刷等の色を
評価するためには光源Ｄ５０（色温度５０００Ｋに相当
する赤っぽい白色）を基準として調整する場合が多い。
また、表示用途によって基準となる色温度を切り替える
場合もある。そこで、本発明の目的は、フィルタ型測色
手段が特定の標準色温度に準拠した三刺激値しか算出で
きない場合でも表示装置を標準色温度以外の表示色に校
正できる表示装置の色校正装置および前記色校正に好適
な表示装置を提供することにある。The conventional color proofing device 500 has a problem that it is difficult to adjust the white balance of the display device 51 based on a color temperature different from that of the standard light source D65. For example, a broadcast monitor or a commercially available display adjusts the light source D93 (bluish white corresponding to a color temperature of 9300K) as a reference, and evaluates a color for printing or the like by using a light source D50 (a red color corresponding to a color temperature of 5000K). (White).
Further, the reference color temperature may be switched depending on the display application. Therefore, an object of the present invention is to provide a color calibration device for a display device that can calibrate a display device to a display color other than the standard color temperature even when the filter-type colorimetric unit can calculate only tristimulus values based on a specific standard color temperature. An object of the present invention is to provide a display device suitable for the color proofing.
【０００７】[0007]
【課題を解決するための手段】第１の観点では、本発明
は、表示用の画面を有する表示装置と、三原色の各色の
光をそれぞれ通す３つのフィルタの透過光を検出するこ
とで前記画面の各色の発光強度を検出すると共に該発光
強度に基づいて特定の標準色温度での分光感度を持つ分
光型測色手段で得られるべき標準色温度準拠三刺激値を
算出するフィルタ型測色手段と、前記標準色温度準拠三
刺激値に基づいて前記表示装置の色校正を行う色校正実
行手段とを備えた表示装置の色校正装置であって、前記
表示装置は、前記標準色温度準拠三刺激値を前記標準色
温度以外の基準色温度での分光感度を持つ分光型測色手
段で得られるべき基準色温度準拠三刺激値に補正するた
めの補正データを格納する補正データ格納手段を具備
し、前記色校正実行手段は、前記フィルタ型測色手段で
算出された標準色温度準拠三刺激値を前記補正データに
基づいて基準色温度準拠三刺激値に補正する基準色温度
準拠三刺激値算出手段と、前記基準色温度準拠三刺激値
を目標値に近づけることで前記表示装置の表示色が前記
基準色温度になるように調整する表示色調整手段とを具
備したことを特徴とする表示装置の色校正装置を提供す
る。上記第１の観点による色校正装置では、フィルタ型
測色手段が算出する三刺激値が特定の標準色温度のみに
準拠している場合でも、色校正実行手段が、表示装置の
補正データ格納手段に格納された補正データを利用し
て、所望の基準色温度に準拠した基準色温度準拠三刺激
値を算出できるようになる。この結果、フィルタ型測色
手段が特定の標準色温度に準拠した三刺激値しか算出で
きない場合でも表示装置を標準色温度以外の表示色に校
正できるようになる。また、表示装置の特性（例えば発
色蛍光体の分光分布）が、機種や個体によって異なる場
合でも、該表示装置に固有の補正データを利用可能とな
るので、校正精度を高くすることが出来る。According to a first aspect of the present invention, there is provided a display device having a display screen, and detecting the transmitted light of three filters that respectively transmit light of the three primary colors. Filter type colorimetric means for detecting the luminous intensity of each color and calculating a standard color temperature compliant tristimulus value to be obtained by spectral type colorimetric means having spectral sensitivity at a specific standard color temperature based on the luminous intensity And a color calibration execution unit for performing color calibration of the display device based on the standard color temperature-based tristimulus values, wherein the display device is configured to execute the standard color temperature-based tristimulus. A correction data storage unit for storing correction data for correcting the stimulus value to a reference color temperature-based tristimulus value to be obtained by a spectral colorimetric unit having a spectral sensitivity at a reference color temperature other than the standard color temperature. And execute the color calibration And a reference color temperature-based tristimulus value calculating unit that corrects the standard color temperature-based tristimulus value calculated by the filter type colorimetric unit into a reference color temperature-based tristimulus value based on the correction data; Display color adjusting means for adjusting the display color of the display device to the reference color temperature by bringing the color temperature based tristimulus value close to the target value. provide. In the color proofing device according to the first aspect, even when the tristimulus values calculated by the filter-type colorimetric means are based only on a specific standard color temperature, the color proofreading executing means can be a correction data storage means of the display device. The reference color temperature-based tristimulus value based on a desired reference color temperature can be calculated using the correction data stored in the. As a result, the display device can be calibrated to a display color other than the standard color temperature even when the filter-type colorimetric means can calculate only the tristimulus values based on the specific standard color temperature. Further, even when the characteristics of the display device (for example, the spectral distribution of the coloring phosphor) differ depending on the model or the individual, correction data unique to the display device can be used, so that the calibration accuracy can be increased.
【０００８】第２の観点では、本発明は、上記構成の表
示装置の色校正装置において、前記表示装置は、測色に
用いるべきフィルタ型測色手段の識別子を格納するフィ
ルタ型測色手段識別子格納手段を具備し、前記色校正実
行手段は、測色に用いるフィルタ型測色手段の識別子が
前記フィルタ型測色手段識別子格納手段に格納された識
別子と異なるときに警告を発するエラー検出手段を具備
したとを特徴とする表示装置の色校正装置を提供する。
上記第２の観点による表示装置の色校正装置では、表示
装置に、測色に用いるべきフィルタ型測色手段の識別子
を格納し、該識別子以外の識別子を持つフィルタ型測色
手段が誤って使用された場合に警告を発するので、不正
なフィルタ型測色手段が使用されて測色の誤差が増大す
ることを防止し、色校正の信頼性を高めることが可能と
なる。According to a second aspect of the present invention, there is provided a color proofing device for a display device having the above-mentioned configuration, wherein the display device stores an identifier of a filter-type colorimetric device to be used for colorimetry. Storage means, wherein the color calibration execution means includes an error detection means for issuing a warning when an identifier of the filter type color measurement means used for color measurement is different from an identifier stored in the filter type color measurement means identifier storage means. Provided is a color proofing device for a display device, comprising:
In the color proofing device for a display device according to the second aspect, the display device stores the identifier of the filter-type colorimetric device to be used for colorimetry, and the filter-type colorimetric device having an identifier other than the identifier is erroneously used. Since a warning is issued in the case where the error is detected, it is possible to prevent the use of an incorrect filter-type colorimetric unit from increasing the error of the colorimetric measurement and to enhance the reliability of the color calibration.
【０００９】第３の観点では、本発明は、特定の標準色
温度での分光感度を持つ分光型測色手段で得られるべき
標準色温度準拠三刺激値を前記標準色温度以外の基準色
温度での分光感度を持つ分光型測色手段で得られるべき
基準色温度準拠三刺激値に補正するための補正データを
格納する補正データ格納手段を具備したことを特徴とす
る表示装置を提供する。上記第３の観点による表示装置
は、上記第１の観点による色校正装置にかかる表示装置
として好適である。[0009] In a third aspect, the present invention provides a standard color temperature-based tristimulus value to be obtained by spectral colorimetric means having spectral sensitivity at a specific standard color temperature. A display device comprising correction data storage means for storing correction data for correcting to a reference color temperature-based tristimulus value to be obtained by a spectral colorimetric means having a spectral sensitivity of (1). The display device according to the third aspect is suitable as a display device for the color proofing device according to the first aspect.
【００１０】[0010]
【発明の実施の形態】以下、図に示す実施の形態により
本発明をさらに詳細に説明する。なお、これにより本発
明が限定されるものではない。図１は、本発明の一実施
形態にかかる色校正装置を示す構成図である。この色校
正装置１００は、ＣＲＴ装置，液晶表示装置，プラズマ
ディスプレイ（ｐｌａｓｍａ ｄｉｓｐｌａｙ）装置な
どの表示装置１と、その表示装置１の画面に吸盤等で取
り付けられて三原色（赤，緑，青）の発光強度をそれぞ
れ検出するＲＧＢセンサ１０と、標準光源Ｄ６５の色温
度での分光感度を持つ分光型測色手段で得られるべき標
準色温度準拠三刺激値Ｘ（Ｄ６５），Ｙ（Ｄ６５），Ｚ
（Ｄ６５）を算出するフィルタ型測色計２０と、前記標
準色温度準拠三刺激値に基づいて色校正を行うパソコン
１０１とを具備して構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited by this. FIG. 1 is a configuration diagram showing a color proofing device according to one embodiment of the present invention. The color proofing device 100 is a display device 1 such as a CRT device, a liquid crystal display device, or a plasma display device, and is attached to a screen of the display device 1 with a suction cup or the like to use three primary colors (red, green, and blue). An RGB sensor 10 for detecting the emission intensity, and a standard color temperature compliant tristimulus value X (D65), Y (D65), Z to be obtained by spectral colorimetric means having spectral sensitivity at the color temperature of the standard light source D65.
It comprises a filter-type colorimeter 20 for calculating (D65) and a personal computer 101 for performing color calibration based on the tristimulus values based on the standard color temperature.
【００１１】前記表示装置１は、測色に用いるべきフィ
ルタ型測色計２０の識別子を格納する測色用フィルタ型
測色計識別子格納部２と、前記標準色温度準拠三刺激値
Ｘ（Ｄ６５），Ｙ（Ｄ６５），Ｚ（Ｄ６５）を基準光源
Ｄαの色温度での分光感度を持つ分光型測色手段で得ら
れるべき標準色温度準拠三刺激値Ｘ（Ｄα），Ｙ（Ｄ
α），Ｚ（Ｄα）に補正するための基準色温度用補正係
数を格納する基準色温度用補正係数格納部３とを具備し
ている。前記測色用フィルタ型測色計識別子格納部２，
前記基準色温度用補正係数格納部３の媒体は、例えばＥ
ＥＰＲＯＭ（Ｅｌｅｃｔｒｉｃａｌｌｙ Ｅｒａｓａｂ
ｌｅ Ｐｒｏｇｒａｍｍａｂｌｅ Ｒｅａｄ Ｏｎｌｙ
Ｍｅｍｏｒｙ）である。The display device 1 includes a colorimetric filter type colorimeter identifier storage unit 2 for storing an identifier of a filter type colorimeter 20 to be used for colorimetry, and the standard color temperature compliant tristimulus value X (D65). ), Y (D65), Z (D65) are tristimulus values based on standard color temperature X (Dα), Y (D) to be obtained by spectral colorimetric means having spectral sensitivity at the color temperature of reference light source Dα.
a) and a reference color temperature correction coefficient storage unit 3 for storing a reference color temperature correction coefficient for correcting to Z (Dα). The colorimetric filter type colorimeter identifier storage unit 2,
The medium of the reference color temperature correction coefficient storage unit 3 is, for example, E
EPROM (Electrically Erasab)
le Programmable Read Only
Memory).
【００１２】前記ＲＧＢセンサ１０は、赤色光を通す赤
フィルタ１１Ｒと、緑色光を通す緑フィルタ１１Ｇと、
青色光を通す青フィルタ１１Ｂと、前記赤フィルタ１１
Ｒを透過した光を検出する光検出素子１２Ｒと、前記緑
フィルタ１１Ｇを透過した光を検出する光検出素子１２
Ｇと、前記青フィルタ１１Ｂを透過した光を検出する光
検出素子１２Ｂとを具備している。The RGB sensor 10 includes a red filter 11R that transmits red light, a green filter 11G that transmits green light,
A blue filter 11B for transmitting blue light;
A light detection element 12R for detecting light transmitted through R, and a light detection element 12R for detecting light transmitted through the green filter 11G.
G and a light detection element 12B for detecting light transmitted through the blue filter 11B.
【００１３】前記フィルタ型測色計２０は、前記ＲＧＢ
センサ１０から送られた発光強度（ｒ，ｇ，ｂ）に基づ
いて該ＲＧＢセンサ１０の分光感度を反映したセンサ三
刺激値（Ｘ’，Ｙ’，Ｚ’）を算出するセンサ三刺激値
算出部２１と、前記センサ三刺激値（Ｘ’，Ｙ’，
Ｚ’）を前記標準色温度準拠三刺激値Ｘ（Ｄ６５），Ｙ
（Ｄ６５），Ｚ（Ｄ６５）に換算するための標準色温度
用換算係数を格納する標準色温度用換算係数格納部２２
と、前記換算を行う標準色温度準拠三刺激値演算部２３
と，自己の識別子を格納するフィルタ型測色計識別子格
納部３４とを具備している。The filter type colorimeter 20 includes the RGB
Sensor tristimulus value calculation for calculating sensor tristimulus values (X ′, Y ′, Z ′) reflecting the spectral sensitivity of the RGB sensor 10 based on the light emission intensity (r, g, b) sent from the sensor 10 Unit 21 and the sensor tristimulus values (X ′, Y ′,
Z ′) is converted to the standard color temperature-based tristimulus value X (D65), Y
(D65), a standard color temperature conversion coefficient storage unit 22 for storing a standard color temperature conversion coefficient for conversion into Z (D65)
And a standard color temperature-based tristimulus value calculating unit 23 for performing the conversion.
And a filter type colorimeter identifier storage unit 34 for storing its own identifier.
【００１４】前記パソコン１０１は、表示信号出力部３
１と、エラー検出部３２と、基準光源Ｄαの色温度での
分光感度を持つ分光型測色手段で得られるべき基準色温
度準拠三刺激値Ｘ（Ｄα），Ｙ（Ｄα），Ｚ（Ｄα）を
算出する基準色温度準拠三刺激値算出部３３と、白バラ
ンス調整部３４と、色校正の目標たる三刺激目標値を格
納する三刺激目標値格納部３５とを具備している。The personal computer 101 has a display signal output unit 3
1, an error detection unit 32, and reference color temperature-based tristimulus values X (Dα), Y (Dα), Z (Dα) to be obtained by spectral colorimetric means having spectral sensitivity at the color temperature of the reference light source Dα. ), A reference color temperature-based tristimulus value calculation unit 33, a white balance adjustment unit 34, and a tristimulus target value storage unit 35 for storing a tristimulus target value as a color calibration target.
【００１５】図２は、図１の色校正装置１００による色
校正処理を示すフロー図である。ステップＳ１では、操
作者は、表示装置１の画面の一区画（例えば中央部）に
ＲＧＢセンサ１０を取り付ける。FIG. 2 is a flowchart showing a color proofing process by the color proofing device 100 of FIG. In step S1, the operator attaches the RGB sensor 10 to one section (for example, the center) of the screen of the display device 1.
【００１６】ステップＳ２では、前記パソコン１０１の
表示信号出力部３１は、白バランスの基準となる基準光
源Ｄαの色を表現すると予測される表示信号を前記表示
装置１へ出力する。ただし、前記基準光源Ｄαに合致す
る色が実際に表示されるかは保証し得ない。前記基準光
源Ｄαは、標準光源Ｄ６５でもよいし、それ以外の光源
（例えばＤ９３，Ｄ５０，２８００Ｋ〜１００００Ｋの
色温度範囲で操作者が選択した光源）でもよい。白レベ
ル輝度は、例えば、６０ｃｄ／ｍ２〜１００ｃｄ／ｍ２
程度の範囲内で設定される。In step S2, the display signal output section 31 of the personal computer 101 outputs to the display device 1 a display signal which is predicted to represent the color of the reference light source Dα as a reference for white balance. However, it cannot be guaranteed that a color that matches the reference light source Dα is actually displayed. The reference light source Dα may be a standard light source D65 or another light source (for example, D93, D50, a light source selected by an operator in a color temperature range of 2800K to 10000K). The white level luminance is, for example, 60 cd / m 2 to 100 cd / m 2.
It is set within the range.
【００１７】ステップＳ３では、前記フィルタ型測色計
２０のセンサ三刺激値算出部２１は、前記発光強度
（ｒ，ｇ，ｂ）に基づいて、前記ＲＧＢセンサ１０の分
光感度を反映したセンサ三刺激値（Ｘ’，Ｙ’，Ｚ’）
を算出する。なお、前記センサ三刺激値（Ｘ’，Ｙ’，
Ｚ’）は、In step S3, the sensor tristimulus value calculation unit 21 of the filter type colorimeter 20 determines the sensor tristimulus value reflecting the spectral sensitivity of the RGB sensor 10 based on the emission intensity (r, g, b). Stimulus value (X ', Y', Z ')
Is calculated. The sensor tristimulus values (X ′, Y ′,
Z ') is
【数１】 で表される。ただし、光波長λに対応する画面上の赤蛍
光体，緑蛍光体，青蛍光体の分光分布をそれぞれＲ
（λ），Ｇ（λ），Ｂ（λ）とし、前記ＲＧＢセンサ１
０の分光感度をｘ’（λ），ｙ’（λ），ｚ’（λ）と
するとき、 Ｘｒ’＝∫｛Ｒ（λ）＊ｘ’（λ）｝ｄλ Ｘｇ’＝∫｛Ｇ（λ）＊ｘ’（λ）｝ｄλ Ｘｂ’＝∫｛Ｂ（λ）＊ｘ’（λ）｝ｄλ Ｙｒ’＝∫｛Ｒ（λ）＊ｙ’（λ）｝ｄλ Ｙｇ’＝∫｛Ｇ（λ）＊ｙ’（λ）｝ｄλ Ｙｂ’＝∫｛Ｂ（λ）＊ｙ’（λ）｝ｄλ Ｚｒ’＝∫｛Ｒ（λ）＊ｚ’（λ）｝ｄλ Ｚｇ’＝∫｛Ｇ（λ）＊ｚ’（λ）｝ｄλ Ｚｂ’＝∫｛Ｂ（λ）＊ｚ’（λ）｝ｄλ である。(Equation 1) It is represented by However, the spectral distributions of the red, green and blue phosphors on the screen corresponding to the light wavelength λ are R
(Λ), G (λ), B (λ), and the RGB sensor 1
When the spectral sensitivity of 0 is x ′ (λ), y ′ (λ), z ′ (λ), Xr ′ = ∫ ｛R (λ) * x ′ (λ)｝ dλ Xg ′ = ∫ ｛G ( λ) * x ′ (λ)｝ dλ Xb ′ = ∫ ｛B (λ) * x ′ (λ)｝ dλ Yr ′ = ∫ ｛R (λ) * y ′ (λ)｝ dλ Yg ′ = ∫ ｛G (Λ) * y ′ (λ)｝ dλ Yb ′ = ∫ ｛B (λ) * y ′ (λ)｝ dλ Zr ′ = ∫ ｛R (λ) * z ′ (λ)｝ dλ Zg ′ = ∫ ｛ G (λ) * z ′ (λ)｝ dλ Zb ′ =｝ B (λ) * z ′ (λ)｝ dλ.
【００１８】ステップＳ４では、前記フィルタ型測色計
２０の標準色温度準拠三刺激値演算部２３は、前記標準
色温度用換算係数格納部２２に格納された標準色温度用
換算係数（ｋ１，ｋ２，…，ｋ９）を用いて、In step S4, the standard color temperature-based tristimulus value calculation section 23 of the filter type colorimeter 20 converts the standard color temperature conversion coefficient (k1, k1) stored in the standard color temperature conversion coefficient storage section 22. k2, ..., k9),
【数２】 により、前記センサ三刺激値（Ｘ’，Ｙ’，Ｚ’）を標
準色温度準拠三刺激値Ｘ（Ｄ６５），Ｙ（Ｄ６５），Ｚ
（Ｄ６５）に換算し、前記パソコン５０１へ出力する。
なお、前記標準色温度用換算係数は、(Equation 2) , The sensor tristimulus values (X ′, Y ′, Z ′) are converted into standard color temperature-based tristimulus values X (D65), Y (D65), Z
(D65) and output to the personal computer 501.
The conversion coefficient for the standard color temperature is:
【数３】 により表される。ただし、標準光源Ｄ６５の光波長λに
対応するＣＩＥ等色関数の分光感度をｘ（λ），ｙ
（λ），ｚ（λ）とするとき、 Ｘｒ＝∫｛Ｒ（λ）＊ｘ（λ）｝ｄλ Ｘｇ＝∫｛Ｇ（λ）＊ｘ（λ）｝ｄλ Ｘｂ＝∫｛Ｂ（λ）＊ｘ（λ）｝ｄλ Ｙｒ＝∫｛Ｒ（λ）＊ｙ（λ）｝ｄλ Ｙｇ＝∫｛Ｇ（λ）＊ｙ（λ）｝ｄλ Ｙｂ＝∫｛Ｂ（λ）＊ｙ（λ）｝ｄλ Ｚｒ＝∫｛Ｒ（λ）＊ｚ（λ）｝ｄλ Ｚｇ＝∫｛Ｇ（λ）＊ｚ（λ）｝ｄλ Ｚｂ＝∫｛Ｂ（λ）＊ｚ（λ）｝ｄλ である。前記標準色温度用換算係数は、標準光源Ｄ６５
に相当する色を、フィルタ型測色計２０と分光型測色計
の両方で測定し、前記フィルタ型測色計２０で得たセン
サ三刺激値（Ｘ’，Ｙ’，Ｚ’）と，前記分光型測色計
で得たＣＩＥ三刺激値とを対比させることで算出でき
る。(Equation 3) Is represented by Here, the spectral sensitivity of the CIE color matching function corresponding to the light wavelength λ of the standard light source D65 is x (λ), y
Xr =） R (λ) * x (λ)｝ dλ Xg = ∫ ｛G (λ) * x (λ)｝ dλ Xb = ∫ ｛B (λ) * X (λ)｝ dλ Yr = ∫ ｛R (λ) * y (λ)｝ dλ Yg = ∫ ｛G (λ) * y (λ)｝ dλ Yb = ∫ ｛B (λ) * y (λ) ｝ Dλ Zr = ∫ ｛R (λ) * z (λ)｝ dλ Zg = ∫ ｛G (λ) * z (λ)｝ dλ Zb = ∫ ｛B (λ) * z (λ)｝ dλ. The conversion coefficient for the standard color temperature is the standard light source D65.
Is measured by both the filter-type colorimeter 20 and the spectral-type colorimeter, and the sensor tristimulus values (X ′, Y ′, Z ′) obtained by the filter-type colorimeter 20 are: It can be calculated by comparing with the CIE tristimulus values obtained by the above-mentioned spectral colorimeter.
【００１９】ステップＳ５では、前記パソコン１０１
は、前記表示装置１の測色用フィルタ型測色計識別子格
納部２から測色に用いるべきフィルタ型測色計の識別子
を読み出す。In step S5, the personal computer 101
Reads the identifier of the filter type colorimeter to be used for colorimetry from the colorimetric filter type colorimeter identifier storage unit 2 of the display device 1.
【００２０】ステップＳ６では、前記パソコン１０１の
エラー検出部３２は、上記ステップＳ５で読み出した識
別子が、測色に用いるフィルタ型測色計２０の識別子と
一致しているか否か判定する。一致していなければステ
ップＳ７へ進み、一致していればステップＳ８へ進む。In step S6, the error detection section 32 of the personal computer 101 determines whether the identifier read in step S5 matches the identifier of the filter type colorimeter 20 used for colorimetry. If they do not match, the process proceeds to step S7, and if they do match, the process proceeds to step S8.
【００２１】ステップＳ７では、警告メッセージを表示
する。例えば、“誤ったフィルタ型測色計が取り付けら
れています。正しいフィルタ型測色計を取り付けて下さ
い。”と表示する。そして、この表示をもって、処理を
終了する。In step S7, a warning message is displayed. For example, "The wrong filter-type colorimeter is installed. Please install the correct filter-type colorimeter." Then, the process ends with this display.
【００２２】ステップＳ８では、前記パソコン１０１
は、基準光源Ｄαが標準光源Ｄ６５であるか否か判定す
る。基準光源Ｄαが標準光源Ｄ６５でなければステップ
Ｓ９へ進み、基準光源Ｄαが標準光源Ｄ６５であればス
テップＳ１１へ進む。In step S8, the personal computer 101
Determines whether the reference light source Dα is the standard light source D65. If the reference light source Dα is not the standard light source D65, the process proceeds to step S9. If the reference light source Dα is the standard light source D65, the process proceeds to step S11.
【００２３】ステップＳ９では、前記パソコン１０１
は、表示装置１の基準色温度用補正係数格納部３から、
基準色温度用補正係数（ｍ１，ｍ２，…，ｍ９）を読み
出す。なお、前記基準色温度用補正係数は、In step S9, the personal computer 101
Is obtained from the reference color temperature correction coefficient storage unit 3 of the display device 1.
The reference color temperature correction coefficients (m1, m2,..., M9) are read. Note that the reference color temperature correction coefficient is
【数４】 により表される。ただし、｜行列式｜（Ｄα）の各要素
は、基準光源Ｄαの光波長λに対応するＣＩＥ等色関数
の分光感度をｘ（λ），ｙ（λ），ｚ（λ）としたとき
の上記Ｘｒ，Ｘｇ，Ｘｂ，Ｙｒ，Ｙｇ，Ｙｂ，Ｚｒ，Ｚ
ｇ，Ｚｂである。上式の右辺の行列式の各要素は、標準
光源Ｄ６５および基準光源Ｄαに相当する色を分光型測
色計で測定することにより予め取得される。そして、上
式の行列演算により基準色温度用補正係数を算出し、色
校正処理前に前記基準色温度用補正係数格納部３に格納
しておく（基準光源Ｄαの候補が複数ある場合には、各
候補について基準色温度用補正係数を格納しておく必要
がある）。(Equation 4) Is represented by Here, each element of | determinant | (Dα) is obtained when the spectral sensitivity of the CIE color matching function corresponding to the light wavelength λ of the reference light source Dα is x (λ), y (λ), z (λ). Xr, Xg, Xb, Yr, Yg, Yb, Zr, Z
g and Zb. Each element of the determinant on the right side of the above equation is obtained in advance by measuring colors corresponding to the standard light source D65 and the reference light source Dα with a spectrophotometer. Then, the reference color temperature correction coefficient is calculated by the matrix operation of the above equation, and stored in the reference color temperature correction coefficient storage unit 3 before the color calibration processing (when there are a plurality of reference light source Dα candidates, It is necessary to store a reference color temperature correction coefficient for each candidate.)
【００２４】ステップＳ１０では、前記パソコン１０１
の標準色温度準拠三刺激値算出部３３は、上記ステップ
Ｓ４で算出した標準色温度準拠三刺激値Ｘ（Ｄ６５），
Ｙ（Ｄ６５），Ｚ（Ｄ６５）を、In step S10, the personal computer 101
The standard color temperature-based tristimulus value calculation unit 33 calculates the standard color temperature-based tristimulus value X (D65) calculated in step S4.
Y (D65), Z (D65)
【数５】 により基準色温度準拠三刺激値Ｘ（Ｄα），Ｙ（Ｄ
α），Ｚ（Ｄα）に補正する。(Equation 5) The tristimulus values X (Dα), Y (D
α) and Z (Dα).
【００２５】ステップＳ１１では、前記パソコン１０１
は、上記ステップＳ４で得た標準色温度準拠三刺激値
（基準光源Ｄαが標準光源Ｄ６５である場合）または上
記ステップＳ１０で得た基準色温度準拠三刺激値（基準
光源Ｄαが標準光源Ｄ６５でない場合）が、前記三刺激
目標値格納部３５に格納された三刺激目標値と異なるか
否か判定する。三刺激目標値と異なっていればステップ
Ｓ１２へ進み、三刺激目標値と一致していれば色校正処
理を終了する。In step S11, the personal computer 101
Is the standard color temperature based tristimulus value obtained in step S4 (when the reference light source Dα is the standard light source D65) or the reference color temperature based tristimulus value obtained in step S10 (the reference light source Dα is not the standard light source D65). Is different from the target tristimulus value stored in the target tristimulus value storage unit 35. If it is different from the tristimulus target value, the process proceeds to step S12, and if it is coincident with the tristimulus target value, the color proofing process ends.
【００２６】ステップＳ１２では、前記パソコン１０１
の白バランス調整部３４は、前記標準色温度準拠三刺激
値（基準光源Ｄαが標準光源Ｄ６５である場合）または
前記基準色温度準拠三刺激値（基準光源Ｄαが標準光源
Ｄ６５でない場合）が、三刺激目標値と一致するよう
に、表示装置１のゲインおよびバイアスを調整する。こ
れにより、表示色を基準光源Ｄαの色温度にする色校正
が完了する。なお、ゲインは画面の明部のバランスを調
整し、バイアスは画面の暗部のバランスを調整する機能
を有する。In step S12, the personal computer 101
The white balance adjustment unit 34 of the standard color temperature-based tristimulus value (when the reference light source Dα is the standard light source D65) or the reference color temperature-based tristimulus value (when the reference light source Dα is not the standard light source D65) The gain and bias of the display device 1 are adjusted so as to match the tristimulus target value. Thus, the color calibration for setting the display color to the color temperature of the reference light source Dα is completed. Note that the gain has a function of adjusting the balance of the bright part of the screen, and the bias has the function of adjusting the balance of the dark part of the screen.
【００２７】なお、上記色校正処理は、画面全体の白バ
ランスの均一性すなわちホワイトユニフォーミティ（ｗ
ｈｉｔｅ ｕｎｉｆｏｒｍｉｔｙ）を良好にする見地か
ら、画面上の複数の区画（例えば画面の中央部と四隅
や、画面を２５分割したときの各区画）のそれぞれにつ
いて行うことが好ましい。Note that the above color proofing process is based on the uniformity of the white balance of the entire screen, that is, the white uniformity (w
From the viewpoint of improving the white uniformity, it is preferable to perform this process for each of a plurality of sections on the screen (for example, the center and four corners of the screen, or each section when the screen is divided into 25).
【００２８】以上の色校正装置１００によれば、フィル
タ型測色計２０が標準光源Ｄ６５に準拠した標準色温度
準拠三刺激値Ｘ（Ｄ６５），Ｙ（Ｄ６５），Ｚ（Ｄ６
５）しか算出できない場合でも、表示装置１の表示色を
標準光源Ｄ６５以外の基準光源Ｄαの色温度に校正する
ことが可能となる。According to the color proofing apparatus 100 described above, the filter type colorimeter 20 uses the standard color temperature-based tristimulus values X (D65), Y (D65), Z (D6) based on the standard light source D65.
Even when only 5) can be calculated, the display color of the display device 1 can be calibrated to the color temperature of the reference light source Dα other than the standard light source D65.
【００２９】[0029]
【発明の効果】本発明の表示装置の色校正装置および表
示装置によれば、フィルタ型測色手段が特定の標準光源
に準拠した標準色温度準拠三刺激値しか算出できない場
合でも、表示装置を標準光源の色温度とは異なる基準色
に合わせて校正することが出来る。また、標準色温度準
拠三刺激値を基準色温度準拠三刺激値に補正するための
補正データを表示装置内に格納するので、例えば、色校
正実行手段が、遠隔地にある表示装置の補正データをネ
ットワーク経由で取得して色校正を行うことが可能とな
る。According to the color proofing device and the display device of the display device of the present invention, even if the filter type colorimetric means can calculate only the standard color temperature-based tristimulus value based on the specific standard light source, the display device can be used. Calibration can be performed according to a reference color different from the color temperature of the standard light source. In addition, since the correction data for correcting the standard color temperature-based tristimulus value to the reference color temperature-based tristimulus value is stored in the display device, for example, the color calibration execution unit may use the correction data of the remote display device. Can be obtained via a network to perform color proofing.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の一実施形態にかかる色校正装置を示す
構成図である。FIG. 1 is a configuration diagram illustrating a color proofing device according to an embodiment of the present invention.
【図２】図１の色校正装置による色校正処理を示すフロ
ー図である。FIG. 2 is a flowchart showing a color proofing process by the color proofing device of FIG. 1;
【図３】従来の色校正装置の一例を示す構成図である。FIG. 3 is a configuration diagram illustrating an example of a conventional color proofing device.
１００ 色校正装置 １ 表示装置 ２ 測色用フィルタ型測色計識別子格納部 ３ 基準色温度用補正係数格納部 １０ ＲＧＢセンサ １１Ｒ 赤フィルタ １１Ｇ 緑フィルタ １１Ｂ 青フィルタ １２Ｒ，１２Ｇ，１２Ｂ 光検出素子 ２０ フィルタ型測色計 ２１ センサ三刺激値算出部 ２２ 標準色温度用換算係数格納部 ２３ 標準色温度準拠三刺激値演算部 ２４ フィルタ型測色計識別子格納部 ３１ 表示信号出力部 ３２ エラー検出部 ３３ 基準色温度準拠三刺激値算出部 ３４ 白バランス調整部 ３５ 三刺激目標値格納部 １０１ パソコン Reference Signs List 100 color proofing device 1 display device 2 colorimetric filter type colorimeter identifier storage unit 3 reference color temperature correction coefficient storage unit 10 RGB sensor 11R red filter 11G green filter 11B blue filter 12R, 12G, 12B photodetector 20 filter Model colorimeter 21 Sensor tristimulus value calculation unit 22 Standard color temperature conversion coefficient storage unit 23 Standard color temperature compliant tristimulus value calculation unit 24 Filter type colorimeter identifier storage unit 31 Display signal output unit 32 Error detection unit 33 Reference Color temperature based tristimulus value calculation unit 34 White balance adjustment unit 35 Tristimulus target value storage unit 101 Personal computer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G020 AA08 DA05 DA13 DA22 DA31 DA34 DA35 DA65 5B057 CE06 CE17 CE18 CH11 DA15 DB02 DB06 DB09 DC25 5C066 AA03 AA15 BA20 CA11 EA15 EE04 FA09 GA01 GA32 GA33 KA12 KD06 KE04 KE17 KM12 KM13 KP00 KP03 5C079 HB01 HB05 HB11 LA02 LA23 LB01 MA01 MA11 MA17 NA03 PA05 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2G020 AA08 DA05 DA13 DA22 DA31 DA34 DA35 DA65 5B057 CE06 CE17 CE18 CH11 DA15 DB02 DB06 DB09 DC25 5C066 AA03 AA15 BA20 CA11 EA15 EE04 FA09 GA01 GA32 GA33 KA12 KD06 KE04 K17 K00 K03 KE17 K00 5C079 HB01 HB05 HB11 LA02 LA23 LB01 MA01 MA11 MA17 NA03 PA05
Claims (3)
色の各色の光をそれぞれ通す３つのフィルタの透過光を
検出することで前記画面の各色の発光強度を検出すると
共に該発光強度に基づいて特定の標準色温度での分光感
度を持つ分光型測色手段で得られるべき標準色温度準拠
三刺激値を算出するフィルタ型測色手段と、前記標準色
温度準拠三刺激値に基づいて前記表示装置の色校正を行
う色校正実行手段とを備えた表示装置の色校正装置であ
って、 前記表示装置は、前記標準色温度準拠三刺激値を前記標
準色温度以外の基準色温度での分光感度を持つ分光型測
色手段で得られるべき基準色温度準拠三刺激値に補正す
るための補正データを格納する補正データ格納手段を具
備し、 前記色校正実行手段は、前記フィルタ型測色手段で算出
された標準色温度準拠三刺激値を前記補正データに基づ
いて基準色温度準拠三刺激値に補正する基準色温度準拠
三刺激値算出手段と、前記基準色温度準拠三刺激値を目
標値に近づけることで前記表示装置の表示色が前記基準
色温度になるように調整する表示色調整手段とを具備し
たことを特徴とする表示装置の色校正装置。1. A display device having a display screen, and a light emission intensity of each color of the screen is detected by detecting transmitted light of three filters that respectively transmit light of three primary colors, and based on the light emission intensity. A filter-type colorimetric means for calculating a standard color temperature-based tristimulus value to be obtained by a spectral type colorimetric means having spectral sensitivity at a specific standard color temperature; and A color calibration device for a display device, comprising: a color calibration execution unit that performs color calibration of the display device, wherein the display device obtains the standard color temperature-based tristimulus value at a reference color temperature other than the standard color temperature. Correction color storage means for storing correction data for correcting to a reference color temperature-based tristimulus value to be obtained by spectral colorimetric means having spectral sensitivity, wherein the color calibration execution means comprises: Calculated by means A reference color temperature-based tristimulus value calculating unit that corrects the standard color temperature-based tristimulus value to a reference color temperature-based tristimulus value based on the correction data, and bringing the reference color temperature-based tristimulus value closer to a target value. A display color adjusting unit for adjusting a display color of the display device to the reference color temperature.
において、 前記表示装置は、測色に用いるべきフィルタ型測色手段
の識別子を格納するフィルタ型測色手段識別子格納手段
を具備し、 前記色校正実行手段は、測色に用いるフィルタ型測色手
段の識別子が前記フィルタ型測色手段識別子格納手段に
格納された識別子と異なるときに警告を発するエラー検
出手段を具備したことを特徴とする表示装置の色校正装
置。2. The color proofing device for a display device according to claim 1, wherein the display device includes a filter type colorimetric unit identifier storage unit that stores an identifier of a filter type colorimetric unit to be used for colorimetry. Wherein the color calibration executing means includes an error detecting means for issuing a warning when an identifier of the filter type color measuring means used for color measurement is different from an identifier stored in the filter type color measuring means identifier storing means. A color proofing device for a display device.
光型測色手段で得られるべき標準色温度準拠三刺激値を
前記標準色温度以外の基準色温度での分光感度を持つ分
光型測色手段で得られるべき基準色温度準拠三刺激値に
補正するための補正データを格納する補正データ格納手
段を具備したことを特徴とする表示装置。3. A standard color temperature-based tristimulus value to be obtained by spectral type colorimetric means having a spectral sensitivity at a specific standard color temperature is converted to a spectral type having a spectral sensitivity at a standard color temperature other than the standard color temperature. A display device comprising: correction data storage means for storing correction data for correcting to a reference color temperature-based tristimulus value to be obtained by a colorimetric means.
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