TW202221685A - Current decay method for use in display driving, flat panel display, and information process device do not need extra data preprocessing unit and/or data post-processing unit while merely requiring an automatic current limiting unit - Google Patents
Current decay method for use in display driving, flat panel display, and information process device do not need extra data preprocessing unit and/or data post-processing unit while merely requiring an automatic current limiting unit Download PDFInfo
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本發明為顯示驅動技術之有關領域,尤指一種用於平面顯示面板之顯示驅動的電流衰減方法。The present invention relates to the field of display driving technology, and more particularly, to a current attenuation method for display driving of a flat display panel.
已知,平面顯示器包含非自發光型平面顯示器以及自發光型平面顯示器,其中液晶顯示器為使用已久的一種非自發光型平面顯示器,而有機發光二極體(Organic light-emitting diode, OLED)顯示器以及發光二極體(Light-emitting diode, LED)顯示器則為習知的自發光型平面顯示器。圖1顯示習知的一種OLED顯示器的方塊圖。如圖1所示,OLED顯示器1a的架構係主要包括:一OLED顯示面板11a、一閘極(列)驅動單元12a、一源極(行)驅動單元13a、一顯示控制器14a、以及一電壓轉換單元15a。It is known that a flat panel display includes a non-self-emissive flat panel display and a self-emissive flat panel display, wherein a liquid crystal display is a non-self-emissive flat panel display that has been used for a long time, and an organic light-emitting diode (OLED) Displays and light-emitting diode (LED) displays are known as self-luminous flat panel displays. FIG. 1 shows a block diagram of a conventional OLED display. As shown in FIG. 1, the structure of the OLED display 1a mainly includes: an
熟悉OLED顯示器之設計與製造的電子工程師都知道,源極驅動單元13a可以單獨為一源極驅動晶片,也可以和閘極驅動單元12a一同整合為單一顯示驅動晶片。實務設計中,通常會令所述源極驅動單元13a同時包含一伽馬(Gamma)電壓產生單元131a,其用以將由該電壓轉換單元15a所提供的一工作電壓轉換成複數個參考伽馬電壓,使該源極驅動單元13a內的複數個資料顯示驅動單元可以依據複數個所述參考伽馬電壓以及由該顯示控制器14a所傳送的一序列資料信號和一資料時鐘信號而產生對應的複數個驅動訊號以傳送至該OLED顯示面板11a。Electronic engineers familiar with the design and manufacture of OLED displays know that the
應知道,OLED顯示面板11a包括M×N個OLED子像素111a以及M×N個像素電路單元112a。由於OLED子像素111a之自發光和高亮度的元件特性,慮及降低系統功耗,顯示驅動晶片的設計製造商會使源極驅動單元13a具有一自動電流限制(Auto current limit, ACL)單元133a,其主要作用是在電流(亮度)較高之時將過高的電流衰減,從而達到降低系統功耗的目的。It should be known that the
圖2顯示一幀顯示畫面的平均亮度相對於數位亮度資料(Digital brightness value, DBV)的轉換曲線圖,且圖3顯示輸入顯示資料的像素亮度相對於輸出顯示資料的像素亮度的轉換曲線圖。執行電流衰減作業時,該自動電流限制單元133a先計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度得出該幀顯示畫面需要被衰減的參數(如圖2所示)。獲得電流(亮度)衰減參數之後,接著依該電流衰減參數對一幀顯示畫面的輸入顯示資料中的每個子像素按比例進行縮減(如圖3所示)。如此操作能夠有效地降低了系統功耗,可惜的是,啟用該自動電流限制單元133a會使OLED顯示面板11a的亮度調節偏離預設定的人眼視覺規律曲線(即,gamma曲線)。FIG. 2 shows the conversion curve of the average brightness of a frame of display image to the digital brightness value (DBV), and FIG. 3 shows the conversion curve of the pixel brightness of the input display data to the pixel brightness of the output display data. When performing the current attenuation operation, the automatic current limiting
為了解決前述問題,顯示驅動晶片的設計製造商特別令該自動電流限制單元133a包含伽馬校正功能。圖4顯示習知的一種具有伽馬校正功能之自動電流限制單元133a的方塊圖。如圖4所示,所述具有伽馬校正功能之自動電流限制單元133a包括:一第一伽馬校正單元1331a、一ACL執行單元1332a以及一第二伽馬校正單元1333a。如此設計,在接收一幀顯示畫面的輸入顯示資料之後,自動電流限制單元133a的第一伽馬校正單元1331a依據一伽馬參數(例如gamma2.2)而對顯示資料的畫素亮度執行一伽馬校正作業(即,資料前處理),接著ACL執行單元1332a對完成伽馬校正作業的顯示資料的畫素亮度執行一電流限制作業。最終,自動電流限制單元133a的第二伽馬校正單元1332a依據另一伽馬參數(例如gamma0.45)而對電流限制作業的顯示資料的畫素亮度再執行一次伽馬校正作業(即,資料後處理)。In order to solve the aforementioned problems, the design and manufacturer of the display driver chip specially makes the automatic current limiting
實務經驗指出,圖4所示具有伽馬校正功能之自動電流限制單元133a在對一幀顯示畫面的輸入顯示資料執行ACL作業的過程中必須依序地啟用第一伽馬校正單元1331a、ACL執行單元1332a以及第二伽馬校正單元1333a,不僅使得ACL作業的整體運行時間延長,同時也使顯示驅動晶片(源極驅動單元13a)的整體系統功耗增加。Practical experience has pointed out that the automatic current limiting
由上述說明可知,本領域亟需一種新式的用於顯示驅動之電流衰減方法。From the above description, it can be seen that a novel current decay method for display driving is urgently needed in the art.
本發明之主要目的在於提供一種用於顯示驅動之電流衰減方法,其應用在包括至少一顯示驅動晶片與一自發光顯示面板的一平面顯示器之中。在對例如為OLED顯示面板之平面顯示面板執行一ACL作業的過程中,本發明之電流衰減方法於計算出一初始電流衰減參數之後,會先對該初始電流衰減參數執行一伽馬映射轉換處理從而獲得一電流衰減參數,接著利用所述電流衰減參數對所述一幀顯示畫面所包含之各個顯示像素亮度資料執行一加權運算,使得經過運算處理後的一幀顯示畫面所包含之顯示像素亮度符合人眼視覺規律曲線。在應用本發明之電流衰減方法的情況下,所述顯示驅動晶片只需要具有一自動電流限制單元,不需要額外的資料前處理單元及/或資料後處理單元。The main purpose of the present invention is to provide a current attenuation method for display driving, which is applied in a flat panel display including at least one display driving chip and a self-luminous display panel. In the process of performing an ACL operation on a flat display panel such as an OLED display panel, after calculating an initial current decay parameter, the current decay method of the present invention first performs a gamma mapping conversion process on the initial current decay parameter Thereby, a current attenuation parameter is obtained, and then a weighted operation is performed on the brightness data of each display pixel included in the one frame of display image by using the current attenuation parameter, so that the display pixel brightness included in the one frame of display image after the operation is processed. It conforms to the regular curve of human vision. In the case of applying the current attenuation method of the present invention, the display driving chip only needs to have an automatic current limiting unit, and no additional data preprocessing unit and/or data postprocessing unit is required.
為達成上述目的,本發明提出所述用於顯示驅動之電流衰減方法的一實施例,其應用在包括至少一顯示驅動晶片與一平面顯示面板的一平面顯示器之中,且包括以下步驟:In order to achieve the above object, the present invention proposes an embodiment of the current attenuation method for display driving, which is applied to a flat panel display including at least one display driving chip and a flat panel display panel, and includes the following steps:
計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度而獲得一初始電流衰減參數;calculating the average brightness of a frame of display images, and then obtaining an initial current attenuation parameter according to the average brightness of a frame;
依據一分段式伽馬轉換曲線對所述初始電流衰減參數執行一伽馬映射轉換處理,從而獲得一電流衰減參數;以及performing a gamma mapping conversion process on the initial current decay parameter according to a segmented gamma conversion curve, thereby obtaining a current decay parameter; and
利用所述電流衰減參數對所述一幀顯示畫面所包含之各個顯示像素亮度資料執行一加權運算之後,將其輸出。After performing a weighting operation on the luminance data of each display pixel included in the one frame of display image by using the current decay parameter, the output is output.
在一實施例中,所述顯示像素亮度資料可代表紅色子畫素灰階值、綠色子畫素灰階值或藍色子畫素灰階值。In one embodiment, the display pixel luminance data may represent a red sub-pixel gray-scale value, a green sub-pixel gray-scale value, or a blue sub-pixel gray-scale value.
在一實施例中,所述加權運算為乘法運算。In one embodiment, the weighting operation is a multiplication operation.
在一實施例中,該平面顯示面板包括M×N個子像素,且所述子像素為選自於由有機發光二極體(Organic light-emitting diode, OLED)、發光二極體(Light-emitting diode, LED)、量子點發光二極體(Quantum light-emitting diode, QLED)、微發光二極體(Mirco LED)和次毫米發光二極體(Mini LED)所組成群組之中一種發光元件。In one embodiment, the flat display panel includes M×N sub-pixels, and the sub-pixels are selected from organic light-emitting diodes (OLEDs), light-emitting diodes (Light-emitting diodes). Diode, LED), Quantum light-emitting diode (QLED), micro light-emitting diode (Mirco LED) and sub-millimeter light-emitting diode (Mini LED) is a light-emitting element in the group consisting of .
本發明同時提供一種平面顯示器,其包括至少一顯示驅動晶片和一平面顯示面板,且該顯示驅動晶片具有一自動電流限制單元用以執行一電流衰減方法;所述電流衰減方法包括以下步驟:The present invention also provides a flat panel display, which includes at least a display driver chip and a flat panel display panel, and the display driver chip has an automatic current limiting unit for executing a current decay method; the current decay method includes the following steps:
計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度而獲得一初始電流衰減參數;calculating the average brightness of a frame of display images, and then obtaining an initial current attenuation parameter according to the average brightness of a frame;
依據一伽馬參數對所述初始電流衰減參數執行一參數調整處理,從而獲得一電流衰減參數;以及performing a parameter adjustment process on the initial current decay parameter according to a gamma parameter, thereby obtaining a current decay parameter; and
對所述一幀顯示畫面所包含之顯示像素亮度資料和所述電流衰減參數執行一加權運算之後,將其輸出。After performing a weighting operation on the display pixel brightness data and the current attenuation parameter included in the one frame of display image, the output is output.
在一實施例中,所述顯示像素亮度資料可代表紅色子畫素灰階值、綠色子畫素灰階值或藍色子畫素灰階值。In one embodiment, the display pixel luminance data may represent a red sub-pixel gray-scale value, a green sub-pixel gray-scale value, or a blue sub-pixel gray-scale value.
在一實施例中,所述加權運算為乘法運算。In one embodiment, the weighting operation is a multiplication operation.
在一實施例中,該平面顯示面板包括M×N個子像素,且所述子像素為選自於由有機發光二極體(Organic light-emitting diode, OLED)、發光二極體(Light-emitting diode, LED)、量子點發光二極體(Quantum light-emitting diode, QLED)、微發光二極體(Mirco LED)和次毫米發光二極體(Mini LED)所組成群組之中一種發光元件。In one embodiment, the flat display panel includes M×N sub-pixels, and the sub-pixels are selected from organic light-emitting diodes (OLEDs), light-emitting diodes (Light-emitting diodes). Diode, LED), Quantum light-emitting diode (QLED), micro light-emitting diode (Mirco LED) and sub-millimeter light-emitting diode (Mini LED) is a light-emitting element in the group consisting of .
本發明同時提供一種資訊處理裝置,其具有如前所述本發明之平面顯示器。The present invention also provides an information processing device having the flat panel display of the present invention as described above.
在可能的實施例中,該資訊處理裝置可為智慧型手機、智慧手錶、智慧手環、平板電腦、筆記型電腦、一體式電腦、門禁裝置、桌上型電腦、或工業電腦。In a possible embodiment, the information processing device can be a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, an access control device, a desktop computer, or an industrial computer.
為使 貴審查委員能進一步瞭解本發明之結構、特徵、目的、與其優點,茲附以圖式及較佳具體實施例之詳細說明如後。In order to enable your examiners to further understand the structure, characteristics, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are attached as follows.
本發明主要揭示一種用於顯示驅動之電流衰減方法,其應用在包括至少一顯示驅動晶片與一自發光顯示面板的一平面顯示器之中。在對例如為OLED顯示面板之平面顯示面板執行一ACL作業的過程中,本發明之電流衰減方法於計算出一初始電流衰減參數之後,會先對該初始電流衰減參數執行一伽馬映射轉換處理從而獲得一電流衰減參數,接著利用所述電流衰減參數對所述一幀顯示畫面所包含之各個顯示像素亮度資料執行一加權運算,使得經過運算處理後的一幀顯示畫面所包含之顯示像素亮度符合人眼視覺規律曲線。在應用本發明之電流衰減方法的情況下,所述顯示驅動晶片只需要具有一自動電流限制單元,不需要額外的資料前處理單元及/或資料後處理單元。The present invention mainly discloses a current decay method for display driving, which is applied in a flat panel display including at least one display driving chip and a self-luminous display panel. In the process of performing an ACL operation on a flat display panel such as an OLED display panel, after calculating an initial current decay parameter, the current decay method of the present invention first performs a gamma mapping conversion process on the initial current decay parameter Thereby, a current attenuation parameter is obtained, and then a weighted operation is performed on the brightness data of each display pixel included in the one frame of display image by using the current attenuation parameter, so that the display pixel brightness included in the one frame of display image after the operation is processed. It conforms to the regular curve of human vision. In the case of applying the current attenuation method of the present invention, the display driving chip only needs to have an automatic current limiting unit, and no additional data preprocessing unit and/or data postprocessing unit is required.
圖5顯示應用有本發明之一種用於顯示驅動之電流衰減方法的一OLED顯示器的方塊圖。如圖5所示,OLED顯示器1的架構係主要包括:一OLED顯示面板11、一閘極(列)驅動單元12、一源極(行)驅動單元13、一顯示控制器14、以及一電壓轉換單元15。 其中,該源極驅動單元13具有一伽馬(gamma)電壓產生單元131以及用以執行此電流衰減方法的一自動電流限制(Auto current limit, ACL)單元133。FIG. 5 shows a block diagram of an OLED display to which a current decay method for display driving of the present invention is applied. As shown in FIG. 5, the structure of the OLED display 1 mainly includes: an
熟悉OLED顯示器之設計與製造的電子工程師都知道,源極驅動單元13可以單獨為一源極驅動晶片,也可以和閘極驅動單元12一同整合為單一顯示驅動晶片。由圖5可知,OLED顯示面板11包括M×N個OLED子像素111以及M×N個像素電路單元112。由於OLED子像素111之自發光和高亮度的元件特性,因使,慮及降低系統功耗之故,源極驅動單元13具有所述自動電流限制單元133,用以於電流(亮度)較高之時將過高的電流衰減,從而達到降低系統功耗的目的。Electronic engineers who are familiar with the design and manufacture of OLED displays know that the
圖6顯示自動電流限制單元133的方塊圖,且圖7顯示本發明之一種用於顯示驅動之電流衰減方法的流程圖。在自動電流限制單元133執行一自動電流限制(ALC)作業的過程中,本發明之電流衰減方法會首先執行步驟S1:計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度而獲得一初始電流衰減參數 (如圖2所示)。接著,方法流程係繼續執行步驟S2:依據一分段式轉換曲線對所述初始電流衰減參數執行一映射轉換處理,從而獲得一電流衰減參數。所述分段式轉換曲線的橫坐標具有複數個綁點,且各所述綁點的縱座標對應值係利用以下數學運算式(1)算出:
(1-&%)’= (1-&%)
gamma_x……………………………(1)
FIG. 6 shows a block diagram of the automatic current limiting
於上式(1)中,(1-&%)代表所述綁點的數值,且(1-&%)’代表所述綁點的縱座標對應值。值得說明的是,gamma_x係一小於1的正實數,其值較佳為 0.45。另外,所述映射轉換處理包括:當一所述初始電流衰減參數位於兩個所述綁點之間時,進行一內插計算以得出一所述電流衰減參數。In the above formula (1), (1-&%) represents the value of the binding point, and (1-&%)' represents the corresponding value of the ordinate of the binding point. It should be noted that gamma_x is a positive real number less than 1, and its value is preferably 0.45. In addition, the mapping conversion process includes: when the initial current decay parameter is located between the two binding points, performing an interpolation calculation to obtain the current decay parameter.
另外,假設顯示資料為8位元,則代表本發明之技術特徵之式(2)便可以下式(3)表示: pixel_ out=pixel_ in …………………………(2) pixel_ out= ……(3) In addition, assuming that the display data is 8 bits, the formula (2) representing the technical characteristics of the present invention can be expressed by the following formula (3): pixel_out = pixel_in …………………………(2) pixel_out = ...(3)
其中,gamma_x1和gamma_x2互為倒數。Among them, gamma_x1 and gamma_x2 are reciprocals of each other.
於上式(2)和式(3)之中,PIXEL_IN指的是輸入顯示資料,其可為紅色子畫素灰階值、綠色子畫素灰階值或藍色子畫素灰階值,pixel_
in則代表PIXEL_IN的歸一值,另一方面,pixel_
out代表輸出顯示資料的歸一值。並且,在一可行實施例中,gamma_x1和gamma_x2可示範性地分別為0.45以及2.2。熟悉顯示器之伽馬校正的電子工程師應可理解,gamma_x2一般用於伽馬校正(轉換)操作,而gamma_x1 則用於反伽馬校正(de-gamma)操作。補充說明的是,如圖6所示,前述所列之數學運算式可以函式庫或查找表的形式被編輯為一參數調整單元1331,以利於應用在該源極驅動單元13所具有之所述自動電流限制單元133之中。
In the above equations (2) and (3), PIXEL_IN refers to the input display data, which can be a red sub-pixel grayscale value, a green sub-pixel grayscale value, or a blue subpixel grayscale value, pixel_in represents the normalized value of PIXEL_IN, on the other hand, pixel_out represents the normalized value of the output display data. Also, in a feasible embodiment, gamma_x1 and gamma_x2 can be exemplarily 0.45 and 2.2, respectively. Electronic engineers familiar with display gamma correction should understand that gamma_x2 is generally used for gamma correction (conversion) operations, while gamma_x1 is used for de-gamma correction (de-gamma) operations. It should be added that, as shown in FIG. 6 , the mathematical operation formulas listed above can be edited into a
圖8顯示初始電流衰減參數相對於電流衰減參數的轉換曲線圖。如圖8所示,對應於不同的gamma綁點0、1、2、……、n,利用分段式轉換曲線對所述初始電流衰減參數執行一映射轉換處理所獲得之電流衰減參數的數值也隨之改變。進一步地,如圖6與圖7所示,方法流程最終執行步驟S3:利用所述電流衰減參數對所述一幀顯示畫面所包含之各個顯示像素亮度資料執行一加權運算之後,將其輸出。在一實施例中,所述加權運算為乘法運算。在完成步驟S1-S3之後,經過運算處理後的一幀顯示畫面所包含之顯示像素亮度會符合人眼視覺規律曲線。Figure 8 shows a conversion plot of the initial current decay parameter versus the current decay parameter. As shown in FIG. 8 , corresponding to different gamma binding points 0, 1, 2, . also changed. Further, as shown in FIG. 6 and FIG. 7 , the method flow finally executes step S3 : using the current attenuation parameter to perform a weighting operation on the luminance data of each display pixel included in the one frame of display image, and output it. In one embodiment, the weighting operation is a multiplication operation. After steps S1-S3 are completed, the brightness of the display pixels included in a frame of display image after the arithmetic processing will conform to the human visual law curve.
如此,上述係已完整且清楚地說明本發明之一種用於顯示驅動之電流衰減方法;並且,經由上述可得知本發明係具有下列之優點:Thus, the above has completely and clearly explained a current decay method for display driving of the present invention; and, from the above, it can be known that the present invention has the following advantages:
(1)本發明揭示一種用於顯示驅動之電流衰減方法,其應用在包括至少一顯示驅動晶片與一自發光顯示面板的一平面顯示器之中。在對例如為OLED顯示面板之平面顯示面板執行一ACL作業的過程中,本發明之電流衰減方法於計算出一初始電流衰減參數之後,會先對該初始電流衰減參數執行一伽馬映射轉換處理從而獲得一電流衰減參數,接著利用所述電流衰減參數對所述一幀顯示畫面所包含之各個顯示像素亮度資料執行一加權運算,使得經過運算處理後的一幀顯示畫面所包含之顯示像素亮度符合人眼視覺規律曲線。在應用本發明之電流衰減方法的情況下,所述顯示驅動晶片只需要具有一自動電流限制單元,不需要額外的資料前處理單元及/或資料後處理單元。(1) The present invention discloses a current decay method for display driving, which is applied to a flat panel display including at least one display driving chip and a self-luminous display panel. In the process of performing an ACL operation on a flat display panel such as an OLED display panel, after calculating an initial current decay parameter, the current decay method of the present invention first performs a gamma mapping conversion process on the initial current decay parameter Thereby, a current attenuation parameter is obtained, and then a weighted operation is performed on the brightness data of each display pixel included in the one frame of display image by using the current attenuation parameter, so that the display pixel brightness included in the one frame of display image after the operation is processed. It conforms to the regular curve of human vision. In the case of applying the current attenuation method of the present invention, the display driving chip only needs to have an automatic current limiting unit, and no additional data preprocessing unit and/or data postprocessing unit is required.
(2)本發明同時提供一種平面顯示器,其包括至少一顯示驅動晶片和一平面顯示面板,且該顯示驅動晶片具有一自動電流限制單元用以執行本發明所述之用於顯示驅動的電流衰減方法。在一實施例中,該平面顯示面板包括M×N個子像素,且所述子像素為選自於由有機發光二極體(Organic light-emitting diode, OLED)、發光二極體(Light-emitting diode, LED)、量子點發光二極體(Quantum light-emitting diode, QLED)、微發光二極體(Mirco LED)和次毫米發光二極體(Mini LED)所組成群組之中一種發光元件。(2) The present invention also provides a flat panel display, which includes at least one display driving chip and a flat display panel, and the display driving chip has an automatic current limiting unit for performing the current attenuation for display driving according to the present invention method. In one embodiment, the flat display panel includes M×N sub-pixels, and the sub-pixels are selected from organic light-emitting diodes (OLEDs), light-emitting diodes (Light-emitting diodes). Diode, LED), Quantum light-emitting diode (QLED), micro light-emitting diode (Mirco LED) and sub-millimeter light-emitting diode (Mini LED) is a light-emitting element in the group consisting of .
(3)本發明同時提供一種資訊處理裝置,其具有如前所述本發明之平面顯示器。並且,該資訊處理裝置是選自於由智慧型手機、智慧手錶、智慧手環、平板電腦、筆記型電腦、一體式電腦、門禁裝置、桌上型電腦、和工業電腦所組成群組之中的一種電子裝置。(3) The present invention also provides an information processing device having the flat panel display of the present invention as described above. And, the information processing device is selected from the group consisting of smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, access control devices, desktop computers, and industrial computers of an electronic device.
必須加以強調的是,前述本案所揭示者乃為較佳實施例,舉凡局部之變更或修飾而源於本案之技術思想而為熟習該項技藝之人所易於推知者,俱不脫本案之專利權範疇。It must be emphasized that the above-mentioned disclosure in this case is a preferred embodiment, and any partial changes or modifications originating from the technical ideas of this case and easily inferred by those who are familiar with the art are within the scope of the patent of this case. category of rights.
綜上所陳,本案無論目的、手段與功效,皆顯示其迥異於習知技術,且其首先發明合於實用,確實符合發明之專利要件,懇請 貴審查委員明察,並早日賜予專利俾嘉惠社會,是為至禱。To sum up, regardless of the purpose, means and effect of this case, it shows that it is completely different from the conventional technology, and its first invention is practical, and it does meet the patent requirements of the invention. Society is to pray for the best.
1a:OLED顯示器
11a:OLED顯示面板
12a:閘極驅動單元
13a:源極驅動單元
131a:伽馬電壓產生單元
133a:自動電流限制單元
1331a:第一伽馬校正單元
1332a:ACL執行單元
1333a:第二伽馬校正單元
14a:顯示控制器
15a:電壓轉換單元
1:OLED顯示器
11:OLED顯示面板
12:閘極驅動單元
13:源極驅動單元
131:伽馬電壓產生單元
133:自動電流限制單元
1331:參數調整單元
14:顯示控制器
15:電壓轉換單元
S1:計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度而獲得一初始電流衰減參數
S2:依據一伽馬參數對所述初始電流衰減參數執行一參數調整處理,從而獲得一電流衰減參數
S3:對所述一幀顯示畫面所包含之顯示像素亮度資料和所述電流衰減參數執行一數學運算之後,將其輸出
1a:
圖1為習知的一種OLED顯示器的方塊圖; 圖2為一幀顯示畫面的平均亮度相對於數位亮度資料的轉換曲線圖; 圖3為輸入顯示資料的像素亮度相對於輸出顯示資料的像素亮度的轉換曲線圖; 圖4為習知的一種具有伽馬校正功能之自動電流限制單元的方塊圖; 圖5為應用有本發明之一種用於顯示驅動之電流衰減方法的一OLED顯示器的方塊圖; 圖6為應用有本發明之用於顯示驅動之電流衰減方法的一自動電流限制單元的方塊圖; 圖7為本發明之一種用於顯示驅動之電流衰減方法的流程圖;以及 圖8為初始電流衰減參數相對於電流衰減參數的轉換曲線圖。 1 is a block diagram of a conventional OLED display; Fig. 2 is a conversion curve diagram of the average brightness of a frame of display image with respect to digital brightness data; Fig. 3 is the conversion curve diagram of the pixel brightness of input display data with respect to the pixel brightness of output display data; 4 is a block diagram of a conventional automatic current limiting unit with a gamma correction function; 5 is a block diagram of an OLED display to which a current decay method for display driving of the present invention is applied; 6 is a block diagram of an automatic current limiting unit to which the current decay method for display driving of the present invention is applied; 7 is a flow chart of a current decay method for display driving according to the present invention; and FIG. 8 is a conversion graph of the initial current decay parameter relative to the current decay parameter.
S1:計算一幀顯示畫面的平均亮度,而後依據一畫面平均亮度而獲得一初始電流衰減參數 S1: Calculate the average brightness of a frame of display images, and then obtain an initial current decay parameter according to the average brightness of a frame
S2:依據一伽馬參數對所述初始電流衰減參數執行一參數調整處理,從而獲得一電流衰減參數 S2: Perform a parameter adjustment process on the initial current decay parameter according to a gamma parameter, thereby obtaining a current decay parameter
S3:對所述一幀顯示畫面所包含之顯示像素亮度資料和所述電流衰減參數執行一數學運算之後,將其輸出 S3: After performing a mathematical operation on the display pixel brightness data and the current attenuation parameter included in the one frame of display image, output the data
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