TWI415104B - Method and system for calibrating colour purity of display panel and display apparatus having such calibrated display panel - Google Patents
Method and system for calibrating colour purity of display panel and display apparatus having such calibrated display panel Download PDFInfo
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本發明係關於一種用以調校顯示裝置(display apparatus)之顯示面板(display panel)的色純度(colour purity)的調校方法、調校系統以及一種具有該已調校的顯示面板之顯示裝置。 The present invention relates to a calibration method for adjusting the color purity of a display panel of a display apparatus, a calibration system, and a display device having the adjusted display panel .
由於顯示面板(例如，液晶顯示面板(LCD panel)、電漿顯示面板(PDP))的材料與製程，等因素，導致每一片顯示面板在組裝完成後，其色彩表現皆有相當程度的差異。 Due to factors such as the material and process of the display panel (for example, liquid crystal display panel (LCD panel), plasma display panel (PDP)), the color performance of each display panel after the assembly is completed is quite different.
各別的顯示器其紅(R)、綠(G)、藍(B)三原色所構成之色域都不盡相同，且其與影像訊號傳輸之視訊規範(例如，EBU(歐洲廣播聯盟，European Broadcasting Union)、SMPTE-C(美國國家電視系統委員會(National Television System Committee,NTSC)及北美地區採用的視訊規範)，等)所定義之色域也有所差異，不僅讓顯示裝置無法真實呈現影像訊號本身的色彩，更讓相同的影像在不同的顯示裝置上會有不同的色彩表現。 The color gamuts of the three primary colors of red (R), green (G), and blue (B) are different for each display, and the video specifications for transmission with video signals (for example, EBU (European Broadcasting Union, European Broadcasting) The color gamut defined by Union), SMPTE-C (National Television System Committee (NTSC) and the video specifications adopted in North America), etc., also differs, not only does the display device fail to present the video signal itself. The color makes the same image have different color performance on different display devices.
所以同一張影像以不同顯示裝置播放，常會有不同的色彩表現。這不僅容易讓使用者混淆，也限縮了顯示器於色彩精準度要求較高的專業應用領域(例如，工業設計、導播、醫療、服裝設計、室內設計…，等領域)上的揮灑空間。 Therefore, the same image is played on different display devices, and often has different color performance. This is not only easy for users to confuse, but also limits the space on the display in professional applications where color accuracy is high (for example, industrial design, navigation, medical, fashion design, interior design, etc.).
一般的顯示裝置製造廠，針對這部分的問題並未有明確的解決之道，不是不曉得液晶面板存在著此種現象，就是視而不見。雖然，國際知名大廠較能了解顯示面板存在此種問題，但也只能於顯示面板採購時，要求顯示面板製造商在供 貨時，能提供達到一定R、G、B三原色色純度的顯示面板，以降低此一現象對色彩表現的影響。 The general display device manufacturer does not have a clear solution to this part of the problem. It is not that the LCD panel has such a phenomenon, and it is blind. Although internationally renowned manufacturers are better able to understand the existence of such problems in display panels, they can only be used by display panel manufacturers when purchasing display panels. When the goods are available, it can provide a display panel that achieves a certain purity of R, G, and B, to reduce the impact of this phenomenon on color performance.
顯示面板製造廠針對顯示面板之R、G、B色純度的調校，也只能從R、G、B彩色濾光片(colour filter)上的光阻劑成份著手。然而，此種做法只能很粗略的調整顯示面板R、G、B色彩的表現，做出具有跟EBU、SMPTE-C…，等其中一種視訊規範接近之色域的顯示面板，但仍能看出其與標準的視訊規範定義的點有明顯的差異。而且光阻劑占整個顯示面板的成本中極高比例，所以調整R、G、B彩色濾光片上的光阻劑，不僅相當耗費人力及時間，也相當程度的受限於成本考量。 The display panel manufacturer's adjustment of the R, G, and B color purity of the display panel can only be started from the photoresist components on the R, G, and B color filters. However, this method can only roughly adjust the performance of the display panel R, G, B colors, and make a display panel with a color gamut close to one of the video specifications of EBU, SMPTE-C, etc., but still can see There are significant differences from the points defined by the standard video specifications. Moreover, the photoresist accounts for a very high proportion of the cost of the entire display panel, so adjusting the photoresist on the R, G, and B color filters is not only labor-intensive and time-consuming, but also considerably limited by cost considerations.
因此，本發明之一主要目的在於提供一種用以調校顯示裝置之顯示面板的色純度的調校方法以及調校系統。並且特別地，根據本發明之調校方法及調校系統為低成本、自動化的調校方法及調校系統。 Accordingly, it is a primary object of the present invention to provide a calibration method and calibration system for adjusting the color purity of a display panel of a display device. And in particular, the calibration method and calibration system according to the present invention is a low cost, automated calibration method and calibration system.
此外，本發明之另一目的在於提供一種具有利用根據本發明之調校方法、調校系統與調校好的顯示面板之顯示裝置。 Further, another object of the present invention is to provide a display device having a display panel using the calibration method, the calibration system, and the calibrated display panel according to the present invention.
根據本發明之一較佳具體實施例之調校方法，其用以調校一顯示裝置之一顯示面板的色純度。根據本發明之調校方法首先係於該顯示面板上分別顯示一本質的紅原色影像、一本值的綠原色影像以及一本值的藍原色影像，並且量測該本質的紅原色影像之色座標值與亮度值、該本質的綠原色影像之色座標值與亮度值以及該本質的藍原色影像之色座標值與亮度值。接著，根據本發明之調校方法係輸入一視訊規範規 定之一規範的紅原色影像之色座標值與假設的亮度值、該視訊規範規定之一規範的綠原色影像之色座標值與假設的亮度值以及該視訊規範規定之一規範的藍原色影像之色座標值與假設的亮度值。接著，根據本發明之調校方法係根據一色彩標準之一表色系統轉換以及一配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的紅原色影像之色座標值與假設的亮度值，計算出一第一綠色增益值及一第一藍色增益值。接著，根據本發明之調校方法係根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的綠原色影像之色座標值與假設的亮度值，計算出一第一紅色增益值及一第二藍色增益值。接著，根據本發明之調校方法係根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的藍原色影像之色座標值與假設的亮度值，計算出一第二紅色增益值及一第二綠色增益值。 A calibration method according to a preferred embodiment of the present invention for adjusting the color purity of a display panel of a display device. The calibration method according to the present invention firstly displays an essential red primary color image, a local green primary color image, and a local blue primary color image on the display panel, and measures the color of the essential red primary color image. The coordinate value and the brightness value, the color coordinate value and the brightness value of the essential green primary image, and the color coordinate value and the brightness value of the essential blue primary image. Then, according to the calibration method of the present invention, a video specification is input. The color coordinate value of the red primary color image of one of the specifications and the assumed brightness value, the color coordinate value of the green primary color image specified by one of the video specifications, the assumed brightness value, and the blue primary color image specified by one of the video specifications. The color coordinate value and the assumed brightness value. Next, the calibration method according to the present invention is based on a color system conversion of a color standard and a color matching law, and according to the essence of the red, green, and blue primary color image color coordinate values and brightness values and the red primary color of the specification A color value of the image and a hypothetical brightness value are used to calculate a first green gain value and a first blue gain value. Then, the calibration method according to the present invention is based on the color system conversion of the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green and blue colors, and the green primary color image of the specification. The color coordinate value and the assumed brightness value calculate a first red gain value and a second blue gain value. Then, the calibration method according to the present invention is based on the color system conversion of the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green and blue colors, and the blue primary color image of the specification. The color coordinate value and the assumed brightness value calculate a second red gain value and a second green gain value.
根據本發明之一較佳具體實施例之調校系統，其用以調校一顯示裝置之一顯示面板的色純度。根據本發明之調校系統包含一量測裝置(measuring device)以及一處理裝置(processing device)。當該顯示面板顯示一本質的紅原色影像時，該量測裝置用以量測該本質的紅原色影像之色座標值與亮度值。當該顯示面板顯示一本值的綠原色影像時，該量測裝置用以量測該本質的綠原色影像之色座標值與亮度值。當該顯示面板顯示一本質的藍原色影像時，該量測裝置用以量測該本質的藍原色影像之色座標值與亮度值。該處理裝置係電連接至該量測裝置。該處理裝置包含一第一接收模組、一第二接收模組以及一計算模組。該第一接收模組用以接收一視訊規範規定之一規範的紅原色影像之色座標值與假設的亮度值、該視訊規範規定之一規範的綠原色影像之色座標值與 假設的亮度值以及該視訊規範規定之一規範的藍原色影像之色座標值與假設的亮度值。該第二接收模組用以接收該量測裝置量測之該本質的紅原色影像之色座標值與亮度值、該量測裝置量測之該本質的綠原色影像之色座標值與亮度值以及該量測裝置量測之該本質的藍原色影像之色座標值與亮度值。該計算模組係分別電連接至該第一接收模組以及該第二接收模組。該計算模組用以根據一色彩標準之一表色系統轉換以及一配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的紅原色影像之色座標值與假設的亮度值，計算出一第一綠色增益值及一第一藍色增益值。該計算模組並且用以根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的綠原色影像之色座標值與假設的亮度值，計算出一第一紅色增益值及一第二藍色增益值。該計算模組並且用以根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的藍原色影像之色座標值與假設的亮度值，計算出一第二紅色增益值及一第二綠色增益值。 A calibration system according to a preferred embodiment of the present invention for adjusting the color purity of a display panel of a display device. The calibration system according to the invention comprises a measuring device and a processing device. When the display panel displays an essential red primary image, the measuring device is configured to measure the color coordinate value and the brightness value of the essential red primary image. When the display panel displays a green primary color image of the value, the measuring device is configured to measure the color coordinate value and the brightness value of the essential green primary color image. When the display panel displays an essential blue primary color image, the measuring device is configured to measure the color coordinate value and the brightness value of the essential blue primary color image. The processing device is electrically connected to the measuring device. The processing device includes a first receiving module, a second receiving module, and a computing module. The first receiving module is configured to receive a color coordinate value of a red primary color image and a hypothetical brightness value specified by one of the video specifications, and a color coordinate value of the green primary color image specified by the video specification. The assumed luminance value and the color coordinate value of the blue primary image as specified by one of the video specifications and the assumed luminance value. The second receiving module is configured to receive a color coordinate value and a brightness value of the essential red primary color image measured by the measuring device, and a color coordinate value and a brightness value of the essential green primary color image measured by the measuring device. And the color coordinate value and the brightness value of the essential blue primary color image measured by the measuring device. The computing module is electrically connected to the first receiving module and the second receiving module, respectively. The calculation module is used for color conversion system conversion according to a color standard and a color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green and blue colors, and the color coordinates of the red primary color image of the specification. The value and the assumed luminance value calculate a first green gain value and a first blue gain value. The computing module is further configured to convert the color system according to the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green, and blue colors, and the color coordinates of the green primary color image of the specification. The value and the assumed brightness value calculate a first red gain value and a second blue gain value. The computing module is further configured to convert the color system according to the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green, and blue colors, and the color coordinates of the blue primary color image of the specification. The value and the assumed brightness value calculate a second red gain value and a second green gain value.
根據本發明之一較佳具體實施例之顯示裝置，其包含以根據本發明之調校方法調校過的顯示面板。根據本發明之顯示裝置並且包含一接收模組(receiving module)、一儲存模組(storage module)以及一影像處理模組(processing module)。該影像處理模組係分別電連接至該接收模組、該儲存模組以及該顯示面板。該接收模組用以接收一輸入影像，其中該輸入影像係由一紅色輸入影像、一綠色輸入影像以及一藍色輸入影像所組成。該儲存模組儲存一第一紅色增益值、一第二紅色增益值、一第一綠色增益值、一第二綠色增益值、一藍色增益值以及一第二藍色增益值。特別地，該第一紅色增益值及該第二紅色增益值係根據一色彩標準之一表色系統轉換以 及一配色定律，並根據三本質的紅、綠、藍三原色影像之色座標值與亮度值以及一視訊規範規定之一規範的綠原色與藍原色影像之色座標值與假設的亮度值分別計算而得。該第一綠色增益值及該第二綠色增益值係根據該色彩標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該視訊規範規定之一規範的紅原色與藍原色影像之色座標值與假設的亮度值分別計算而得。該第一藍色增益值及該第二藍色增益值係根據該色彩標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該視訊規範規定之一規範的紅原色與綠原色影像之色座標值與假設的亮度值分別計算而得。該影像處理模組將該紅色輸入影像根據第一綠色增益值及第一藍色增益值處理成一混有綠色及藍色之紅色輸出影像；將該綠色輸入影像根據第一紅色增益值及第二藍色增益值處理成一混有紅色及藍色之綠色輸出影像；並將該藍色輸入影像根據第二紅色增益值及第二綠色增益值處理成一混有紅色及綠色之藍色輸出影像。該影像處理模組並且將該紅色輸出影像、該綠色輸出影像以及該藍色輸出影像所組成之一輸出影像輸出至該顯示面板。隨即，該顯示面板顯示該輸出影像。 A display device according to a preferred embodiment of the present invention, comprising a display panel calibrated in accordance with the calibration method of the present invention. A display device according to the present invention includes a receiving module, a storage module, and an image processing module. The image processing module is electrically connected to the receiving module, the storage module and the display panel, respectively. The receiving module is configured to receive an input image, wherein the input image is composed of a red input image, a green input image, and a blue input image. The storage module stores a first red gain value, a second red gain value, a first green gain value, a second green gain value, a blue gain value, and a second blue gain value. Specifically, the first red gain value and the second red gain value are converted according to one color system of a color standard. And a color matching law, and according to the color coordinates and brightness values of the three primary colors of the three primary colors, and the color coordinate values of the green primary and blue primary color images and the assumed brightness values respectively specified by one of the video specifications. And got it. The first green gain value and the second green gain value are the color system conversion according to the color standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of red, green and blue, and the The color coordinate values of the red primary color and the blue primary color image, which are one of the specifications of the video specification, are calculated separately from the assumed luminance values. The first blue gain value and the second blue gain value are the color system conversion according to the color standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green and blue colors And the color coordinate values of the red primary color and the green primary color image, which are one of the specifications of the video specification, are calculated separately from the assumed luminance values. The image processing module processes the red input image into a red output image mixed with green and blue according to the first green gain value and the first blue gain value; and the green input image is based on the first red gain value and the second The blue gain value is processed into a green output image mixed with red and blue; and the blue input image is processed into a blue output image mixed with red and green according to the second red gain value and the second green gain value. The image processing module outputs an output image composed of the red output image, the green output image, and the blue output image to the display panel. The display panel then displays the output image.
於一具體實施例中，該視訊規範可以是EBU、SMPTE-C、REC709或DCI，等視訊規範。 In a specific embodiment, the video specification may be an EBU, SMPTE-C, REC709, or DCI, and the like.
於一具體實施例中，該色彩標準為CIE色彩標準。 In one embodiment, the color standard is the CIE color standard.
關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。 The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.
本發明係提供一種用以調校顯示裝置之顯示面板的色純度的調校方法、調校系統以及具有利用根據本發明之調校方法、調校系統與調校好的顯示面板之顯示裝置。特別地，根據本發明之調校方法及調校系統為低成本、自動化的調校方法及調校系統。以下藉由對本發明之較佳具體實施例的詳細說明，藉以充分解說關於本發明的特徵、精神、優點以及實施上的可行性。 The present invention provides a calibration method for adjusting the color purity of a display panel of a display device, a calibration system, and a display device having a calibration panel, a calibration system, and a calibrated display panel according to the present invention. In particular, the calibration method and calibration system according to the present invention are low cost, automated calibration methods, and calibration systems. The features, spirits, advantages and implementation possibilities of the present invention are fully explained by the detailed description of the preferred embodiments of the present invention.
請參閱圖一，圖一係根據本發明之一較佳具體實施例之調校系統1的架構及實施環境示意圖。根據本發明之調校系統1係用以調校一顯示裝置2之一顯示面板20的色純度。該顯示裝置2的架構同樣地揭示於圖一。 Please refer to FIG. 1. FIG. 1 is a schematic diagram showing the architecture and implementation environment of the calibration system 1 according to a preferred embodiment of the present invention. The calibration system 1 according to the present invention is for adjusting the color purity of the display panel 20 of one of the display devices 2. The architecture of the display device 2 is similarly disclosed in FIG.
如圖一所示，根據本發明之調校系統1包含一量測裝置10以及一處理裝置12。該處理裝置12係電連接至該量測裝置10。當該顯示面板20顯示一本質的紅原色影像時，該量測裝置10用以量測該本質的紅原色影像之色座標值與亮度值。當該顯示面板20顯示一本值的綠原色影像時，該量測裝置10用以量測該本質的綠原色影像之色座標值與亮度值。當該顯示面板20顯示一本質的藍原色影像時，該量測裝置10用以量測該本質的藍原色影像之色座標值與亮度值。 As shown in FIG. 1, the calibration system 1 according to the present invention includes a measurement device 10 and a processing device 12. The processing device 12 is electrically connected to the measuring device 10. When the display panel 20 displays an essential red primary image, the measuring device 10 is configured to measure the color coordinate value and the brightness value of the essential red primary image. When the display panel 20 displays a green primary color image of the present value, the measuring device 10 is configured to measure the color coordinate value and the brightness value of the essential green primary color image. When the display panel 20 displays an essential blue primary color image, the measuring device 10 is configured to measure the color coordinate value and the brightness value of the essential blue primary color image.
本發明係利用色度學(colormetry)之Grassmann配色定律(Grassmann’s low of color Mixture)，任意色光皆可由紅、綠、藍三原色搭配出來的觀念。以量測裝置10量測顯示面板20之本質的紅原色影像、本質的綠原色影像、本質的藍原色影像的色座標值與亮度值，並取一標準視訊規範規定之規範的紅原色影像、規範的綠原色影像、規範的藍原色影像之色座標值與假設的亮度值，再以配色定律計算出需用多少比例的顯示面板20之本質的紅原色、本質的綠原色、本質的藍原 色，才能各別配出標準視訊規範所規定理想的RGB色座標目標點。 The present invention utilizes the Grassmann's low color mosaic (colormetry), and the concept that any color light can be combined with the three primary colors of red, green and blue. Measuring, by the measuring device 10, the red primary color image of the essence of the display panel 20, the essential green primary color image, the color coordinate value and the brightness value of the essential blue primary color image, and adopting a standard red color image specified by the standard video standard, The standard green primary color image, the color coordinate value of the standard blue primary color image and the assumed brightness value, and then calculate the proportion of the red primary color of the display panel 20, the essence of the green primary color, and the essence of the blue original. Color, in order to be able to match the ideal RGB color coordinates target points specified by the standard video specifications.
於一具體實施例中，該視訊規範可以是EBU、SMPTE-C、REC 709(高解析度電視色彩規範)或DCI(數位電影促進會規範(Digital Cinema Initiatives)，等視訊規範。以EBU為例，EBU視訊規範所規定理想的RGB色座標目標點為：R(0.64,0.33)、G(0.29,0.6)、B(0.15,0.06)。 In a specific embodiment, the video specification may be EBU, SMPTE-C, REC 709 (high-definition television color specification) or DCI (Digital Cinema Initiatives), and the like. The EBU is taken as an example. The ideal RGB color coordinates target points specified by the EBU video specification are: R (0.64, 0.33), G (0.29, 0.6), B (0.15, 0.06).
同樣示於圖一，該處理裝置12包含一第一接收模組122、一第二接收模組124以及一計算模組126。該計算模組126係分別電連接至該第一接收模組122以及該第二接收模組124。 Also shown in FIG. 1 , the processing device 12 includes a first receiving module 122 , a second receiving module 124 , and a computing module 126 . The computing module 126 is electrically connected to the first receiving module 122 and the second receiving module 124, respectively.
如圖一所示，該第一接收模組122用以接收一設定源11所輸出該視訊規範規定之一規範的紅原色影像之色座標值與假設的亮度值，該視訊規範規定之一規範的綠原色影像之色座標值與假設的亮度值以及該視訊規範規定之一規範的藍原色影像之色座標值與假設的亮度值。 As shown in FIG. 1 , the first receiving module 122 is configured to receive a color coordinate value of a red primary color image and a hypothetical brightness value of a specification of the video specification specified by the setting source 11 , and the video specification defines one specification. The color coordinates of the green primary image and the assumed brightness value and the color coordinate values of the blue primary image as specified in one of the video specifications and the assumed brightness value.
該第二接收模組124用以接收該量測裝置10量測之該本質的紅原色影像之色座標值與亮度值、該量測裝置10量測之該本質的綠原色影像之色座標值與亮度值以及該量測裝置10量測之該本質的藍原色影像之色座標值與亮度值。 The second receiving module 124 is configured to receive the color coordinate value and the brightness value of the essential red primary color image measured by the measuring device 10, and the color coordinate value of the essential green primary color image measured by the measuring device 10 And a luminance value and a color coordinate value and a luminance value of the essential blue primary image measured by the measuring device 10.
該計算模組126用以根據一色彩標準之一表色系統轉換以及一配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的紅原色影像之色座標值與假設的亮度值，計算出一第一綠色增益值及一第一藍色增益值。該計算模組126並且用以根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之 色座標值與亮度值以及該規範的綠原色影像之色座標值與假設的亮度值，計算出一第一紅色增益值及一第二藍色增益值。該計算模組126並且用以根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的藍原色影像之色座標值與假設的亮度值，計算出一第二紅色增益值及一第二綠色增益值。 The calculation module 126 is configured to perform a color system conversion according to a color standard and a color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green, and blue colors, and the color of the red primary color image of the specification. The coordinate value and the assumed luminance value calculate a first green gain value and a first blue gain value. The calculation module 126 is further configured to convert the color system according to the standard and the color matching law, and according to the essence of the three primary color images of red, green and blue The color coordinate value and the brightness value and the color coordinate value of the green primary image of the specification and the assumed brightness value calculate a first red gain value and a second blue gain value. The calculation module 126 is further configured to convert the color system according to the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of the red, green, and blue colors, and the color of the blue primary color image of the specification. The coordinate value and the assumed brightness value calculate a second red gain value and a second green gain value.
同樣示於圖一，該顯示裝置2並且包含一儲存模組24。根據本發明之調校系統1其處理裝置12並且包含一傳輸模組128。該傳輸模組128用以接收該計算模組126計算出的紅色增益值、綠色增益值以及藍色增益值，並將紅色增益值、綠色增益值以及藍色增益值傳輸至該顯示裝置2之儲存模組24儲存。該傳輸模組128包含6個參照表LUT1~LUT6，該儲存模組24也包含6個參照表LUT1’~LUT6’。 Also shown in FIG. 1, the display device 2 also includes a storage module 24. The calibration system 1 according to the invention has a processing device 12 and includes a transmission module 128. The transmission module 128 is configured to receive the red gain value, the green gain value, and the blue gain value calculated by the calculation module 126, and transmit the red gain value, the green gain value, and the blue gain value to the display device 2 The storage module 24 is stored. The transmission module 128 includes six reference tables LUT1 to LUT6, and the storage module 24 also includes six reference tables LUT1' to LUT6'.
於一具體實施例中，該色彩標準為CIE色彩標準。國際照明委員會(International Commission on Illumination，通常簡稱為CIE)所定義的色座標為目前最廣為使用的色彩標準之一。 In one embodiment, the color standard is the CIE color standard. The color coordinates defined by the International Commission on Illumination (CIE) are one of the most widely used color standards.
以下以CIE色彩標準為例，對根據本發明之調校系統1做進一步說明。依據CIE表色系統轉換，可將色座標值與亮度值(x,y,Y)轉換成理論三刺激值(X,Y,Z)：
所以，由量測裝置10測量所得之顯示面板20之本質的紅原色影像、本質的綠原色影像、本質的藍原色影像的色座標值與亮度值為 R p (x rp ,y rp ,Y rp )、 G p (x gp ,y gp ,Y gp )、 B p (x bp ,y bp ,Y bp )，可各別換算出其三刺激值，如式(2)、(3)、
(4)：
假設某標準視訊規範所規定之規範的紅原色影像、規範的綠原色影像、規範的藍原色影像之色座標值與假設的亮度值為 R i (x ri ,y ri ,Y ri )、 G i (x gi ,y gi ,Y gi )、 B i (x bi ,y bi ,Y bi )，同理，其各別的三刺激值，如式(5)、(6)、(7)：
依CIE配色定律，可計算出需以顯示面板20本質的三原色之多少比例(B rr ,B rg ,B rb )，才能配出視訊規範所規定的理想紅色的三刺激值 R i (X ri ,Y ri ,Z ri )，以矩陣表示，如式(8)、(9)：
將式(5)代入式(9)，可看出理想紅色假設的亮度值 Y ri ，可視為顯示面板20之本質的紅、綠、藍三原色比例值(B rr ,B rg ,B rb )的共同分母，如式(10)、(11)：
進一步，本發明係利用電路增益補償的方式，來達到顯示面板20色彩空間轉換的目的。本發明之基本觀念，簡單的說就是顯示面板20本質的紅色太綠，則利用電路補償讓顯示面板20少呈現一些綠色，本質的紅色不夠藍，則以電路補償讓顯示面板20多呈現一點藍色。所以式(11)所算出之比例值，可能為正也可能為負，且比例值相當的小。 Further, the present invention achieves the purpose of color space conversion of the display panel 20 by means of circuit gain compensation. The basic idea of the present invention is simply that the red color of the display panel 20 is too green, and the display panel 20 is less green when the circuit compensation is used. The essential red color is not blue enough, so that the display panel 20 presents a little blue with circuit compensation. color. Therefore, the ratio value calculated by equation (11) may be positive or negative, and the proportional value is relatively small.
然而，考量電路查表補償，需填大於零之整數，且紅色本身無法自行做加減，故將(B rr ,B rg ,B rb )正規化成 B rr 為1的比例值(c rr ,c rg ,c rb )=(1,,)，再放大2048倍後四捨五入
取整數；若比例值小於0，則加2048後再填補償表，使得增益補償值介於0~2048之間，而0~1023表示正數比例值，1024~2048表示負數比例值，如式(12)，其中 c rg 為一第一綠色增益值，填於圖一中該傳輸模組128內之LUT3、 c rb 為一第一藍色增益值，則填於該傳輸模組128內之LUT5，如：
若 If
由式(11)、(12)可知，理想紅色假設的亮度值 Y ri 的大小並不會影響正規化後的填表值(c r ,c g ,c b )。同理，欲混合出視訊規範所定義的理想綠色及藍色三刺激值 G i (X gi ,Y gi ,Z gi )、 B i (X bi ,Y bi ,Z bi )，各別需多少比例(B gr ,B gg ,B gb )、(B br ,B bg ,B bb )的顯示面板20之本質的三原色，則可由式(13)、(14)算出：
接著以式(15)、(16)，分別求出填於圖一中該傳輸模組128內之LUT1的一第一紅色增益值 c gr 、該傳輸模組128內之LUT6的一第二藍色增益值 c gb 、該傳輸模組128內之LUT2的一第二紅色增益值 c br 、該傳輸模組128內之LUT4的為一第二綠色增益值 c bg ：
若 If
若 If
上述以電路補償調校顯示面板20色彩表現精準度的方法，共計求出第一紅色增益值 c gr 、第二紅色增益值 c br 、第一綠色增益值 c rg 、第二綠色增益值 c bg 、第一藍色增益值 c rb 以及第二藍色增益值 c gb ，分別填於圖一中該傳輸模組128內之LUT1~LUT6，以達到色彩空間轉換之目的，使顯示面板20之原始色彩空間能與標準的視訊規範相吻合。但礙於顯示面板20的物理特性，視訊規範所定義的色彩空間轉換的目標點，需落在顯示面板20原始的色彩空間內，才能完美實現。若視訊規範定義的色彩空間座標點不在顯示面板20的色彩空間內，也只能將顯示面板20的RGB純色儘可能往視訊規範點移動，轉移到顯示面板20的色彩空間的邊界上。 In the above method for adjusting the color performance of the display panel 20 by circuit compensation, a total of the first red gain value c gr , the second red gain value c br , the first green gain value c rg , and the second green gain value c bg are obtained. The first blue gain value c rb and the second blue gain value c gb are respectively filled in the LUT1~LUT6 in the transmission module 128 in FIG. 1 to achieve the purpose of color space conversion, so that the original display panel 20 is The color space matches the standard video specifications. However, due to the physical characteristics of the display panel 20, the target point of the color space conversion defined by the video specification needs to fall within the original color space of the display panel 20 to be perfectly realized. If the color space coordinate point defined by the video specification is not in the color space of the display panel 20, the RGB solid color of the display panel 20 can only be moved to the video specification point as much as possible, and transferred to the boundary of the color space of the display panel 20.
以下將舉根據本發明之調校系統1調校一待調校LCD顯示面板的實際數據，來對調校過程進一步說明。以該量測裝置10測量該待調校LCD顯示面板之本質的紅、綠、藍三原色的色座標及亮度值，與標準的EBU、SMPTE-C視訊規範規定的三原色色座標及假設的亮度值列於表一。根據上述式(2)、(3)、(4)及式(5)、(6)、(7)求出該待調校LCD顯示面板之 本質的三原色及標準視訊規範三原色之三刺激值，列於表二。再根據式(11)、(13)、(14)求出該待調校LCD顯示面板之本質的三原色配合標準視訊規範三原色之比例值，列於表三。接著以式(12)、(15)、(16)求出分別以 B rr 、 B gg 、 B bb 正規化，並放大2048倍後四捨五入的正整數填表值，電路補償查找表之增益值列於表四。將表四之值填入圖一中顯示裝置2之儲存模組24中，接著再以量測裝置10量測經此電路補償後之顯示面板20的光電特性表現。量測結果顯示，根據本發明之調校系統1調校後，顯示面板20的紅色、綠色、藍色三原色從灰階0到灰階255的色軌跡，平順的分別往EBU及SMPTE-C的視訊規範定義點偏移。 In the following, the calibration system 1 according to the present invention adjusts the actual data of the LCD display panel to be calibrated to further explain the adjustment process. The measuring device 10 measures the color coordinates and brightness values of the three primary colors of the red, green and blue colors of the LCD panel to be calibrated, and the three primary color coordinates and the assumed brightness values specified by the standard EBU and SMPTE-C video specifications. Listed in Table 1. Calculating the three primary colors of the essence of the LCD display panel to be calibrated and the three primary colors of the standard video specifications according to the above formulas (2), (3), (4) and formulas (5), (6), and (7), Listed in Table 2. Then, according to the formulas (11), (13), and (14), the ratios of the three primary colors of the LCD panel to be calibrated to the three primary colors of the standard video standard are obtained, and are listed in Table 3. Then, using equations (12), (15), and (16), we obtain normalized integer-filled values that are normalized by B rr , B gg , and B bb , and are rounded up by 2048 times. The circuit compensates the gain value column of the look-up table. In Table 4. The value of Table 4 is filled in the storage module 24 of the display device 2 in FIG. 1, and then the photoelectricity performance of the display panel 20 compensated by the circuit is measured by the measuring device 10. The measurement results show that after the calibration system 1 of the present invention is calibrated, the color trajectories of the red, green, and blue primary colors of the display panel 20 from grayscale 0 to grayscale 255 are smoothed to the EBU and SMPTE-C respectively. The video specification defines the point offset.
請參閱圖二，圖二係繪示根據本發明之一較佳具體實施例之調校方法3流程圖。根據本發明之調校方法3係用以調校一顯示裝置之一顯示面板的色純度。 Referring to FIG. 2, FIG. 2 is a flow chart showing a calibration method 3 according to a preferred embodiment of the present invention. The calibration method 3 according to the present invention is for adjusting the color purity of a display panel of a display device.
如圖二所示，根據本發明之調校方法3首先係執行步驟S30，於該顯示面板上分別顯示一本質的紅原色影像、一本值的綠原色影像以及一本值的藍原色影像，並且量測該本質的紅原色影像之色座標值與亮度值、該本質的綠原色影像之色座標值與亮度值以及該本質的藍原色影像之色座標值與亮度值。 As shown in FIG. 2, the calibration method 3 according to the present invention first performs step S30, and displays an essential red primary image, a green primary image, and a blue primary image on the display panel. And measuring the color coordinate value and the brightness value of the essential red primary color image, the color coordinate value and the brightness value of the essential green primary color image, and the color coordinate value and the brightness value of the essential blue primary color image.
接著，根據本發明之調校方法3係執行步驟S32，輸入一視訊規範規定之一規範的紅原色影像之色座標值與假設的亮度值、該視訊規範規定之一規範的綠原色影像之色座標值 與假設的亮度值以及該視訊規範規定之一規範的藍原色影像之色座標值與假設的亮度值。 Then, according to the calibration method 3 of the present invention, step S32 is executed to input the color coordinate value of the red primary color image and the assumed brightness value of one of the specifications of the video specification, and the color of the green primary color image specified by one of the video specifications. Coordinate value The color coordinate values of the blue primary color image and the assumed brightness value as specified by the assumed brightness value and one of the specifications of the video specification.
接著，根據本發明之調校方法3係執行步驟S34，根據一色彩標準之一表色系統轉換以及一配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的紅原色影像之色座標值與假設的亮度值，計算出一第一綠色增益值 c rg 及一第一藍色增益值 c rb 。 Then, according to the calibration method 3 of the present invention, step S34 is performed, according to one color standard system color conversion system and a color matching law, and according to the essence of the red, green, and blue primary color image color coordinate values and brightness values and The color coordinate value of the red primary image of the specification and the assumed luminance value calculate a first green gain value c rg and a first blue gain value c rb .
接著，根據本發明之調校方法3係執行步驟S36，根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的綠原色影像之色座標值與假設的亮度值，計算出一第一紅色增益值 c gr 及一第二藍色增益值 c gb 。 Then, according to the calibration method 3 of the present invention, step S36 is performed, according to the color conversion system of the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of red, green and blue, and the A first red gain value c gr and a second blue gain value c gb are calculated from the color coordinates of the normal green color image and the assumed brightness value.
最後，根據本發明之調校方法3係執行步驟S38，根據該標準之該表色系統轉換以及該配色定律，並根據該本質的紅、綠、藍三原色影像之色座標值與亮度值以及該規範的藍原色影像之色座標值與假設的亮度值，計算出一第二紅色增益值 c br 及一第二綠色增益值 c bg 。 Finally, the calibration method 3 according to the present invention performs step S38, according to the color system conversion of the standard and the color matching law, and according to the color coordinate values and brightness values of the three primary color images of red, green and blue, and the A color value of the blue primary color image and a hypothetical brightness value are calculated, and a second red gain value c br and a second green gain value c bg are calculated.
請再參閱圖一，圖一並且揭示係根據本發明之一較佳具體實施例之顯示裝置2之架構，特別地，該顯示裝置2包含以根據本發明之調校方法調校過的顯示面板20。 Referring to FIG. 1 , FIG. 1 and a disclosure of a display device 2 according to a preferred embodiment of the present invention, in particular, the display device 2 includes a display panel adjusted in accordance with the calibration method of the present invention. 20.
如圖一所示，根據本發明之顯示裝置2並且包含一接收模組22、一儲存模組24以及一影像處理模組26。該影像處理模組26係分別電連接至該接收模組22、該儲存模組24以及該顯示面板20。 As shown in FIG. 1 , the display device 2 according to the present invention further includes a receiving module 22 , a storage module 24 and an image processing module 26 . The image processing module 26 is electrically connected to the receiving module 22, the storage module 24, and the display panel 20, respectively.
該接收模組22用以接收一影像源21輸出之一輸入影像，其中該輸入影像係由一紅色輸入影像、一綠色輸入影像 以及一藍色輸入影像所組成。 The receiving module 22 is configured to receive an input image of an image source 21, wherein the input image is a red input image and a green input image. And a blue input image.
該儲存模組24儲存一第一紅色增益值 c gr 、一第二紅色增益值 c br 、一第一綠色增益值 c rg 、一第二綠色增益值 c bg 、一第一藍色增益值 c rb 以及一第二藍色增益值 c gb 。特別地，該第一紅色增益值 c gr 及該第二紅色增益值 c br 係根據一色彩標準之一表色系統轉換以及一配色定律，並根據一本質的紅、綠、藍三原色影像之色座標值與亮度值以及一視訊規範規定之一規範的綠原色與藍原色影像之色座標值與假設的亮度值分別計算而得。該第一綠色增益值 c rg 及該第二綠色增益值 c bg 係根據該色彩標準之該表色系統轉換以及該配色定律，並根據一本質的紅、綠、藍三原色影像之色座標值與亮度值以及該視訊規範規定之一規範的紅原色與藍原色影像之色座標值與假設的亮度值分別計算而得。該第一藍色增益值 c rb 及該第二藍色增益值 c gb 係根據該色彩標準之該表色系統轉換以及該配色定律，並根據一本質的紅、綠、藍三原色影像之色座標值與亮度值以及該視訊規範規定之一規範的紅原色與綠原色影像之色座標值與假設的亮度值分別計算而得。該第一紅色增益值 c gr 、該第二紅色增益值 c br 、該第一綠色增益值 c rg 、該第二綠色增益值 c bg 、該第一藍色增益值 c rb 以及該第二藍色增益值 c gb 計算依據及過程已於上文中詳述過，在此不再贅述。 The storage module 24 stores a first red gain value c gr , a second red gain value c br , a first green gain value c rg , a second green gain value c bg , and a first blue gain value c Rb and a second blue gain value c gb . In particular, the first red gain value c gr and the second red gain value c br are based on a color system conversion and a color matching law, and are based on an essential red, green, and blue primary color image. The coordinate value and the luminance value and the color coordinate values of the green primary color and the blue primary color image, which are one of the specifications of a video specification, are calculated separately from the assumed luminance values. The first green gain value c rg and the second green gain value c bg are the color system conversion according to the color standard and the color matching law, and according to an essential color coordinate value of the three primary color images of red, green and blue The luminance value and the color coordinate value of the red primary color and blue primary color image specified by one of the video specifications are calculated separately from the assumed luminance value. The first blue gain value c rb and the second blue gain value c gb are the color system conversion according to the color standard and the color matching law, and according to an essential color coordinate of the three primary color images of red, green and blue The value and the luminance value and the color coordinate values of the red primary and green primary images specified in one of the video specifications are calculated separately from the assumed luminance values. The first red gain value c gr , the second red gain value c br , the first green gain value c rg , the second green gain value c bg , the first blue gain value c rb , and the second blue The calculation basis and process of the color gain value c gb have been described in detail above and will not be described herein.
如圖一所示，該儲存模組24包含6個參照表LUT1’~LUT6’。該影像處理模組26將該紅色輸入影像根據存於LUT3’內之第一綠色增益值 c rg 及存於LUT5’內之第一藍色增益值 c rb 處理成一混有綠色及藍色之紅色輸出影像，將該綠色輸入影像根據存於LUT1’內之第一紅色增益值 c gr 及存於LUT6’內之第二藍色增益值 c gb 處理成一混有紅色及藍色之綠色輸出影像，並將該藍色輸入影像根據存於LUT2’內之第二紅色增益值 c br 及存於LUT4’內之第二綠色增益值 c bg 處理成一 混有紅色及綠色之藍色輸出影像。該影像處理模組26並且將該紅色輸出影像、該綠色輸出影像以及該藍色輸出影像所組成之一輸出影像輸出至該顯示面板20。隨即，該顯示面板20顯示該輸出影像。藉此，該顯示面板20顯示影像的色純度被調校。 As shown in FIG. 1, the storage module 24 includes six reference tables LUT1'~LUT6'. The image processing module 26 processes the red input image into a green and blue mixed color according to the first green gain value c rg stored in the LUT 3 ′ and the first blue gain value c rb stored in the LUT 5 ′. Outputting an image, the green input image is processed into a green output image mixed with red and blue according to a first red gain value c gr stored in the LUT 1 ′ and a second blue gain value c gb stored in the LUT 6 ′. The blue input image is processed into a blue output image mixed with red and green according to the second red gain value c br stored in the LUT 2 ′ and the second green gain value c bg stored in the LUT 4 ′. The image processing module 26 outputs an output image composed of the red output image, the green output image, and the blue output image to the display panel 20. The display panel 20 then displays the output image. Thereby, the color purity of the image displayed on the display panel 20 is adjusted.
須強調的是，本發明能提供多組不同色彩空間之RGB色純度的調校，可將顯示面板之色彩空間做不同的轉換運算補償，以同時符合多種視訊規範之要求。調校的組數乃取決於顯示裝置內儲存模組之儲存容量的大小。 It should be emphasized that the present invention can provide adjustment of RGB color purity of multiple sets of different color spaces, and can perform different conversion operation compensation on the color space of the display panel to meet the requirements of various video specifications at the same time. The number of groups to be adjusted depends on the storage capacity of the storage modules in the display device.
藉由以上本發明之較佳具體實施例的詳細說明，能清楚了解本發明所提供之調校方法及調校系統係自動化地調校顯示面板的色純度。明顯地，根據本發明之調教方法及調校系統可節省工時、降低成本，且進而提升顯示裝置的產能。同時，並可提高產品特性的一致性，進而提升顯示裝置的品質。 Based on the above detailed description of the preferred embodiments of the present invention, it will be apparent that the calibration method and calibration system provided by the present invention automatically adjusts the color purity of the display panel. Obviously, the tuning method and the calibration system according to the present invention can save man-hours, reduce costs, and further increase the productivity of the display device. At the same time, the consistency of product characteristics can be improved, thereby improving the quality of the display device.
藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。因此，本發明所申請之專利範圍的範疇應該根據上述的說明作最寬廣的解釋，以致使其涵蓋所有可能的改變以及具相等性的安排。 The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. Therefore, the scope of the patented scope of the invention should be construed as broadly construed in the
1‧‧‧調校系統 1‧‧ ‧ calibration system
10‧‧‧量測裝置 10‧‧‧Measurement device
11‧‧‧設定源 11‧‧‧Set source
12‧‧‧處理裝置 12‧‧‧Processing device
122‧‧‧第一接收模組 122‧‧‧First Receiver Module
124‧‧‧第二接收模組 124‧‧‧second receiving module
126‧‧‧計算模組 126‧‧‧Computation Module
128‧‧‧傳輸模組 128‧‧‧Transmission module
2‧‧‧顯示裝置 2‧‧‧Display device
20‧‧‧顯示面板 20‧‧‧ display panel
21‧‧‧影像源 21‧‧‧Image source
22‧‧‧接收模組 22‧‧‧ receiving module
24‧‧‧儲存模組 24‧‧‧ storage module
26‧‧‧影像處理模組 26‧‧‧Image Processing Module
LUT1~LUT6‧‧‧參照表 LUT1~LUT6‧‧‧ reference table
LUT1’~LUT6’‧‧‧參照表 LUT1’~LUT6’‧‧‧ Reference Table
3‧‧‧調校方法 3‧‧‧Revising method
S30~S38‧‧‧流程步驟 S30~S38‧‧‧ Process steps
圖一係為根據本發明之一較佳具體實施例之顯示裝置之調校系統的架構及實施環境示意圖，圖一並且揭示係根據本發明之一較佳具體實施例之顯示裝置之架構，該顯示裝置包含以根據本發明之調校方法調校過的顯示面板。 1 is a schematic diagram of an architecture and an implementation environment of a calibration system of a display device according to a preferred embodiment of the present invention. FIG. 1 and a disclosure of a display device according to a preferred embodiment of the present invention, The display device comprises a display panel that has been calibrated in accordance with the calibration method of the present invention.
圖二為根據本發明之一較佳具體實施例之調校方法的流程圖。 2 is a flow chart of a calibration method in accordance with a preferred embodiment of the present invention.
1‧‧‧調校系統 1‧‧ ‧ calibration system
10‧‧‧量測裝置 10‧‧‧Measurement device
11‧‧‧設定源 11‧‧‧Set source
12‧‧‧處理裝置 12‧‧‧Processing device
122‧‧‧第一接收模組 122‧‧‧First Receiver Module
124‧‧‧第二接收模組 124‧‧‧second receiving module
126‧‧‧計算模組 126‧‧‧Computation Module
128‧‧‧傳輸模組 128‧‧‧Transmission module
2‧‧‧顯示裝置 2‧‧‧Display device
20‧‧‧顯示面板 20‧‧‧ display panel
21‧‧‧影像源 21‧‧‧Image source
22‧‧‧接收模組 22‧‧‧ receiving module
24‧‧‧儲存模組 24‧‧‧ storage module
26‧‧‧影像處理模組 26‧‧‧Image Processing Module
LUT1~LUT6‧‧‧參照表 LUT1~LUT6‧‧‧ reference table
LUT1’~LUT6’‧‧‧參照表 LUT1’~LUT6’‧‧‧ Reference Table
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