TWI795118B - Initialization voltage dynamic adjustment method, OLED display device, and information processing device - Google Patents
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Abstract
本發明主要揭示一種初始化電壓動態調整方法,包括以下步驟:依據前一幀顯示數據計算之平均顯示數據以及當前幀顯示數據之平均顯示數據而自一查找表中查找出一當前幀初始化電壓。接著,在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為畫素電路單元的一初始化電壓。最終,在執行復位及下一幀顯示數據的寫入時,再以一參考初始化電壓作為所述畫素電路單元的該初始化電壓。從而,即使前一幀顯示數據的平均顯示灰階和當前幀顯示數據的平均顯示灰階具有顯著差異,本發明之方法亦可將此顯著差異對於當前幀顯示畫面的亮度所造成的不良影響(亮度下降)降至最低。The present invention mainly discloses a method for dynamically adjusting initialization voltage, which includes the following steps: finding out a current frame initialization voltage from a lookup table based on the average display data calculated from the previous frame display data and the average display data of the current frame display data. Then, when performing reset and writing of display data of the current frame, the initialization voltage of the current frame is used as an initialization voltage of the pixel circuit unit. Finally, a reference initialization voltage is used as the initialization voltage of the pixel circuit unit when performing reset and writing of display data of the next frame. Therefore, even if there is a significant difference between the average display gray scale of the display data of the previous frame and the average display gray scale of the display data of the current frame, the method of the present invention can also reduce the adverse effect caused by the significant difference on the brightness of the display screen of the current frame ( brightness drop) to a minimum.
Description
本發明係關於OLED顯示面板之顯示驅動的技術領域,尤指一種初始化電壓動態調整方法。 The invention relates to the technical field of display driving of an OLED display panel, in particular to a method for dynamically adjusting initialization voltage.
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,其中該OLED顯示面板11a包括M×N個OLED子畫素111a以及M×N個畫素電路單元112a,M、N為大於1之整數。更詳細地說明,各個OLED子畫素111a之二電性端分別耦接由該電壓轉換單元15a提供的一第一驅動電壓ELVDD以及一第二驅動電壓ELVSS。
It is known that flat panel displays include non-self-illuminating flat-panel displays and self-illuminating flat-panel displays, wherein liquid crystal displays are a kind of non-self-illuminating flat-panel displays that have been used for a long time, and organic light-emitting diodes (Organic light-emitting diode, OLED) Displays and light-emitting diode (Light-emitting diode, LED) displays are conventional self-illuminating flat-panel displays. FIG. 1 shows a block diagram of a conventional OLED display. As shown in FIG. 1, the architecture of OLED display 1a mainly includes: an
圖2為為圖1所示之OLED顯示面板的正視圖。實務經驗顯示,由於OLED顯示面板存在磁滯效應,從而會導致前一幀畫面為黑圖時,若該黑圖於當前幀畫面之中被切換成白圖,則該白圖的亮度會出現一定程度的下降。舉例而言,如圖2所示,控制該OLED顯示面板11a以使其前一幀畫面的左半部畫面和右半部畫面分別顯示一黑圖(即,gray 0)與一白圖(即,gray 255)。接著,控制該OLED顯示面板11a以使其當前幀的左半部畫面和右半部畫面皆顯示白圖。值得注意的是,亮度量測值顯示,前一幀畫面所顯示的白圖和當前幀畫面所顯示的白圖的亮度皆為250nits。然而,前一幀畫面所顯示的黑圖在當前幀畫面被切換成的白圖之後,該白圖的亮度只有為200nits,而非為250nits。
FIG. 2 is a front view of the OLED display panel shown in FIG. 1 . Practical experience shows that due to the hysteresis effect of the OLED display panel, when the previous frame is a black image, if the black image is switched to a white image in the current frame, the brightness of the white image will appear certain. degree of decline. For example, as shown in FIG. 2, the
圖3為圖1所示之畫素電路單元112a的電路拓樸結構圖。如圖3所示,該畫素電路單元112a示範性地包括:一驅動薄膜電晶體1Da、一第一薄膜電晶體1M1a、一第二薄膜電晶體1M2a、一開關元件1Sa、以及一儲存電容1Ca。進一步地,圖4為圖3所示之閘極電壓V
G的工作時序圖,且圖5為圖3所示之OLED電流I
OLED的工作時序圖。如圖4所示,對於在前一幀畫面顯示黑色畫素且在當前幀畫面顯示白色畫素的一個畫素電路單元112a而言,其前一幀閘極電壓和當前幀閘極電壓之間具有一閘極電壓差(即,ΔV
G1)。在一初始化階段完成復位以及當前幀顯示數據的寫入之後,可以看到該閘極電壓差仍舊無法全部消除(仍存在ΔV
G2)。
FIG. 3 is a circuit topology diagram of the
對照圖5所示之OLED電流I
OLED的波形可發現,該閘極電壓差(ΔV
G2)導致由該畫素電路單元112a所驅動的OLED子畫素111a的前一幀OLED電流和當前幀OLED電流之間同樣出現一定程度的電流差。故而,如圖2所示,前一幀畫面所顯示的黑圖在當前幀畫面被切換成的白圖之後,該白圖的亮度只有為200 nits,而非為250 nits。必須特別注意的是,隨著顯示幀的提高,復位時間與顯示數據寫入時間也被迫縮短,而這將導致第二閘極電壓差ΔV
G2變大,使得黑圖切換至白圖之時,白圖的亮度會下降更多。
Comparing the waveform of the OLED current I OLED shown in FIG. 5 , it can be found that the gate voltage difference (ΔV G2 ) causes the current frame OLED current of the
由上述說明可知,本領域亟需一種初始化電壓動態調整方法。It can be seen from the above description that there is an urgent need in the art for a method for dynamically adjusting the initialization voltage.
本發明之主要目的在於提供一種初始化電壓動態調整方法,用以在前一幀顯示數據的平均顯示灰階和當前幀顯示數據的平均顯示灰階具有顯著差異的情況之下,動態地調整畫素電路單元的初始化電壓,藉此方式將此顯著差異對於當前幀顯示畫面的亮度所造成的不良影響(亮度下降)降至最低。The main purpose of the present invention is to provide a dynamic adjustment method for initialization voltage, which is used to dynamically adjust the pixel when there is a significant difference between the average display gray scale of the previous frame display data and the average display gray scale of the current frame display data. The initialization voltage of the circuit unit is used to minimize the adverse effect (decrease in brightness) caused by the significant difference on the brightness of the current frame display image.
為達成上述目的,本發明提出所述初始化電壓動態調整方法的一實施例,用於對包括M×N個OLED子畫素以及M×N個畫素電路單元的一OLED顯示面板進行初始化電壓動態調整,M、N為大於1之整數,且包括以下步驟:In order to achieve the above purpose, the present invention proposes an embodiment of the method for dynamically adjusting the initialization voltage, which is used to dynamically initialize the voltage of an OLED display panel including M×N OLED sub-pixels and M×N pixel circuit units. For adjustment, M and N are integers greater than 1, and include the following steps:
依據前一幀顯示數據計算出一第一平均顯示數據,且依據當前幀顯示數據計算出一第二平均顯示數據;calculating a first average display data according to the previous frame display data, and calculating a second average display data according to the current frame display data;
依據該第一平均顯示數據和該第二平均顯示數據而自一查找表中查找出一當前幀初始化電壓;Finding a current frame initialization voltage from a lookup table according to the first average display data and the second average display data;
在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為所述畫素電路單元的一初始化電壓;以及When performing reset and writing the display data of the current frame, using the initialization voltage of the current frame as an initialization voltage of the pixel circuit unit; and
在執行復位及下一幀顯示數據的寫入時,以一參考初始化電壓作為所述畫素電路單元的該初始化電壓。A reference initialization voltage is used as the initialization voltage of the pixel circuit unit when performing reset and writing of display data of the next frame.
在一實施例中,該查找表為包括一前一幀顯示數據軸、一當前幀顯示數據軸以及一初始化電壓軸的一三維查找表,且該前一幀顯示數據軸和該當前幀顯示數據軸設有K個伽馬綁點,K為大於1之正整數。In one embodiment, the lookup table is a three-dimensional lookup table including a previous frame display data axis, a current frame display data axis, and an initialization voltage axis, and the previous frame display data axis and the current frame display data axis There are K gamma binding points for the axis, and K is a positive integer greater than 1.
在一實施例中,所述當前幀顯示數據軸以及所述前一幀顯示數據軸第1個伽馬綁點的灰階值和第K個伽馬綁點的灰階值皆分別為0與255。In an embodiment, the grayscale value of the first gamma binding point and the grayscale value of the Kth gamma binding point of the display data axis of the current frame and the display data axis of the previous frame are both 0 and 0 respectively. 255.
在一實施例中,沿著所述當前幀顯示數據軸,各所述伽馬綁點有與其相對應的一個所述當前幀初始化電壓,且對應第j個所述伽馬綁點的第j個所述當前幀初始化電壓的絕對值係大於對應第j-1個所述伽馬綁點的第j-1個所述當前幀初始化電壓的絕對值,j為大於1之正整數。In an embodiment, along the current frame display data axis, each of the gamma binding points has a corresponding initialization voltage of the current frame, and corresponds to the jth of the jth gamma binding point The absolute value of the current frame initialization voltage is greater than the absolute value of the j-1th current frame initialization voltage corresponding to the j-1th gamma binding point, and j is a positive integer greater than 1.
在一實施例中,在所述第二平均顯示數據落於第j個所述伽馬綁點和第j-1個所述伽馬綁點之間的情況下,係利用內插法計算出與所述第二平均顯示數據對應的所述當前幀初始化電壓。In one embodiment, when the second average display data falls between the jth gamma binding point and the j-1th gamma binding point, the interpolation method is used to calculate The current frame initialization voltage corresponding to the second average display data.
並且,本發明同時提供一種OLED顯示裝置,其包括至少一顯示驅動晶片和一OLED顯示面板,其中,該顯示驅動晶片具有一初始化電壓調整單元用以執行一初始化電壓動態調整方法;所述初始化電壓動態調整方法包括以下步驟:Moreover, the present invention also provides an OLED display device, which includes at least one display driver chip and an OLED display panel, wherein the display driver chip has an initialization voltage adjustment unit for performing a method for dynamically adjusting the initialization voltage; the initialization voltage The dynamic adjustment method includes the following steps:
依據前一幀顯示數據計算出一第一平均顯示數據,且依據當前幀顯示數據計算出一第二平均顯示數據;calculating a first average display data according to the previous frame display data, and calculating a second average display data according to the current frame display data;
依據該第一平均顯示數據和該第二平均顯示數據而自一查找表中查找出一當前幀初始化電壓;Finding a current frame initialization voltage from a lookup table according to the first average display data and the second average display data;
在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為所述畫素電路單元的一初始化電壓;以及When performing reset and writing the display data of the current frame, using the initialization voltage of the current frame as an initialization voltage of the pixel circuit unit; and
在執行復位及下一幀顯示數據的寫入時,以一參考初始化電壓作為所述畫素電路單元的該初始化電壓。A reference initialization voltage is used as the initialization voltage of the pixel circuit unit when performing reset and writing of display data of the next frame.
在一實施例中,該查找表為包括一前一幀顯示數據軸、一當前幀顯示數據軸以及一初始化電壓軸的一三維查找表,且該前一幀顯示數據軸和該當前幀顯示數據軸設有K個伽馬綁點,K為大於1之正整數。In one embodiment, the lookup table is a three-dimensional lookup table including a previous frame display data axis, a current frame display data axis, and an initialization voltage axis, and the previous frame display data axis and the current frame display data axis There are K gamma binding points for the axis, and K is a positive integer greater than 1.
在一實施例中,所述當前幀顯示數據軸以及所述前一幀顯示數據軸第1個伽馬綁點的灰階值和第K個伽馬綁點的灰階值皆分別為0與255。In an embodiment, the grayscale value of the first gamma binding point and the grayscale value of the Kth gamma binding point of the display data axis of the current frame and the display data axis of the previous frame are both 0 and 0 respectively. 255.
在一實施例中,沿著所述當前幀顯示數據軸,各所述伽馬綁點有與其相對應的一個所述當前幀初始化電壓,且對應第j個所述伽馬綁點的第j個所述當前幀初始化電壓的絕對值係大於對應第j-1個所述伽馬綁點的第j-1個所述當前幀初始化電壓的絕對值,j為大於1之正整數。In an embodiment, along the current frame display data axis, each of the gamma binding points has a corresponding initialization voltage of the current frame, and corresponds to the jth of the jth gamma binding point The absolute value of the current frame initialization voltage is greater than the absolute value of the j-1th current frame initialization voltage corresponding to the j-1th gamma binding point, and j is a positive integer greater than 1.
在一實施例中,在所述第二平均顯示數據落於第j個所述伽馬綁點和第j-1個所述伽馬綁點之間的情況下,係利用內插法計算出與所述第二平均顯示數據對應的所述當前幀初始化電壓。In one embodiment, when the second average display data falls between the jth gamma binding point and the j-1th gamma binding point, the interpolation method is used to calculate The current frame initialization voltage corresponding to the second average display data.
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OLED顯示裝置。The present invention also provides an information processing device, which has the aforementioned OLED display device of the present invention.
在一實施例中,該資訊處理裝置是選自於由智能手機、智能手錶、智能手環、平板電腦、筆記型電腦、一體式電腦、門禁裝置、和電子式門鎖所組成群組之中的一種電子裝置。In one embodiment, 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, and electronic door locks an electronic device.
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, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are hereby attached.
請參閱圖6,其顯示應用有本發明之一種初始化電壓動態調整方法的一OLED顯示裝置的方塊圖。如圖6所示,該OLED顯示裝置包括一OLED顯示面板11以及至少一顯示驅動晶片12,其中該OLED顯示面板11包括M×N個OLED子畫素111以及M×N個畫素電路單元112,M、N均為大於1之整數。值得注意的是,在應用有本發明之一種初始化電壓動態調整方法的情況下,該顯示驅動晶片12具有一查找表121以及一初始化電壓調整單元122。更詳細地說明,該查找表121為包括一前一幀顯示數據軸、一當前幀顯示數據軸以及一初始化電壓軸的一三維查找表。
Please refer to FIG. 6 , which shows a block diagram of an OLED display device applying a method for dynamically adjusting initialization voltage of the present invention. As shown in FIG. 6, the OLED display device includes an
圖7為圖6所示之查找表121的一三維座標軸之示例圖,且圖8為圖6所示之查找表121的示範表圖。如圖6與圖7所示,該前一幀(即,第j-1幀)顯示數據軸和該當前幀(即,第j幀)顯示數據軸設有K個伽馬綁點,K為大於1之正整數。舉例而言,共有8個伽馬綁點,分別為Gray 0、Gray 32、Gray 64、Gray 128、Gray 160、Gray 192、Gray 224、以及Gray 255。換句話說,所述當前幀顯示數據軸以及所述前一幀顯示數據軸第1個伽馬綁點的灰階值和第K個伽馬綁點的灰階值皆分別為0與255。 FIG. 7 is an example diagram of a three-dimensional coordinate axis of the lookup table 121 shown in FIG. 6 , and FIG. 8 is an example table diagram of the lookup table 121 shown in FIG. 6 . As shown in Figure 6 and Figure 7, the previous frame (i.e., j-1th frame) display data axis and the current frame (i.e., jth frame) display data axis are provided with K gamma binding points, K is A positive integer greater than 1. For example, there are 8 gamma binding points, namely Gray 0, Gray 32, Gray 64, Gray 128, Gray 160, Gray 192, Gray 224, and Gray 255. In other words, the grayscale value of the first gamma binding point and the grayscale value of the Kth gamma binding point of the display data axis of the current frame and the display data axis of the previous frame are 0 and 255, respectively.
進一步地,圖9顯示本發明之一種初始化電壓動態調整方法的流程圖。在應用有本發明之初始化電壓動態調整方法的情況下,該顯示驅動晶片12在對該OLED顯示面板11進行顯示驅動的過程中會以其初始化電壓調整單元122對提供至述畫素電路單元112的一初始化電壓Vint進行動態調整。首先,該初始化電壓調整單元122執行步驟S1:依據前一幀(即,第j-1幀)顯示數據計算出一第一平均顯示數據,且依據當前幀(即,第j幀)顯示數據計算出一第二平均顯示數據,j為大於1之整數。接著,執行步驟S2:依據該第一平均顯示數據和該第二平均顯示數據而自一查找表121中查找出一當前幀初始化電壓。舉例而言,該第一平均顯示數據為Gray 0(即,顯示黑圖)且該第二平均顯示數據為Gray 64,此時可自該查找表121查找出所述當前幀初始化電壓為V
INT_1。
Further, FIG. 9 shows a flow chart of a method for dynamically adjusting the initialization voltage of the present invention. In the case where the initialization voltage dynamic adjustment method of the present invention is applied, the
再舉例而言,該第一平均顯示數據為Gray 32且而該第二平均顯示數據為Gray 160,此時可自該查找表121查找出所述當前幀初始化電壓為V
INT_9。換句話說,沿著所述當前幀(即,第j幀)顯示數據軸,各所述伽馬綁點有與其相對應的一個所述當前幀初始化電壓(V
INT_J),且對應第j個所述伽馬綁點的第j個所述當前幀初始化電壓的絕對值係大於對應第j-1個所述伽馬綁點的第j-1個所述當前幀初始化電壓的絕對值,j為正整數。當然,在大部分的情況下,該第二平均顯示數據不會剛好等於預設的伽馬綁點。因此,依據本發明之設計,在所述第二平均顯示數據落於第j個所述伽馬綁點和第j-1個所述伽馬綁點之間的情況下,可利用內插法計算出與所述第二平均顯示數據對應的所述當前幀初始化電壓。
For another example, if the first average display data is
繼續地,方法流程係執行步驟S3:在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為所述畫素電路單元的一初始化電壓。請重複參考圖3與圖4,在介於前一幀畫面顯示階段和當前幀畫面顯示階段之間具有一初始化階段。在初始化階段,該畫素電路單元112會進行復位以及當前幀顯示數據的寫入。因此,依據本發明之設計,於步驟S3之中,在執行復位及當前幀顯示數據的寫入時,以自所述查找表121查找獲得之當前幀初始化電壓V
INT_J作為所述畫素電路單元112的一初始化電壓Vint。
Continuing, the method flow is to execute step S3: when executing reset and writing of display data of the current frame, using the initialization voltage of the current frame as an initialization voltage of the pixel circuit unit. Please refer to FIG. 3 and FIG. 4 repeatedly, there is an initialization stage between the display stage of the previous frame and the display stage of the current frame. In the initialization stage, the
最終,方法流程係執行步驟S4:在執行復位及下一幀(即,第j+1幀)顯示數據的寫入時,以一參考初始化電壓(即,圖8所示V REF)作為所述畫素電路單元的該初始化電壓。由前述說明可知,各所述當前幀初始化電壓V INT_J的絕對值皆大於電路預設的一參考初始化電壓V REF的絕對值。 Finally, the method flow is to execute step S4: when performing reset and writing of display data of the next frame (ie, j+1th frame), a reference initialization voltage (ie, V REF shown in FIG. 8 ) is used as the The initialization voltage of the pixel circuit unit. It can be seen from the foregoing description that the absolute value of each current frame initialization voltage V INT_J is greater than the absolute value of a reference initialization voltage V REF preset by the circuit.
圖10為圖6所示之OLED電流的工作時序圖。對於在前一幀(即,第j-1幀)畫面顯示黑色畫素且在當前幀(即,第j幀)畫面顯示白色畫素的一個畫素電路單元112而言,其前一幀閘極電壓和當前幀閘極電壓之間必然具有一閘極電壓差,且此閘極電壓差導致由該畫素電路單元112所驅動的OLED子畫素111的前一幀OLED電流和當前幀OLED電流之間同樣出現一定程度的電流差。如圖10所示,在應用本發明之初始化電壓動態調整方法的情況下,當前幀初始化電壓V
INT_J的值自-3.1V動態地調整為-5.0V,使得所述電流差大幅縮小(8%→3%)。
FIG. 10 is a working timing diagram of the OLED current shown in FIG. 6 . For a
如此,上述已完整且清楚地說明本發明之一種初始化電壓動態調整方法;並且,經由上述可得知本發明具有下列優點:In this way, the above has completely and clearly described a method for dynamically adjusting the initialization voltage of the present invention; and, through the above, it can be known that the present invention has the following advantages:
(1)本發明揭示一種初始化電壓動態調整方法,用以在前一幀顯示數據的平均顯示灰階和當前幀顯示數據的平均顯示灰階具有顯著差異的情況之下,動態地調整畫素電路單元的初始化電壓,藉此方式將此顯著差異對於當前幀顯示畫面的亮度所造成的不良影響(亮度下降)降至最低。(1) The present invention discloses a method for dynamically adjusting the initialization voltage, which is used to dynamically adjust the pixel circuit when there is a significant difference between the average display gray scale of the previous frame display data and the average display gray scale of the current frame display data The initialization voltage of the unit, in this way, the adverse effect (brightness drop) caused by this significant difference on the brightness of the current frame display screen is minimized.
(2)本發明同時提供一種OLED顯示裝置,其包括至少一顯示驅動晶片和一OLED顯示面板,且該顯示驅動晶片具有一查找表以及一初始化電壓調整單元,從而能夠執行前述本發明之一種初始化電壓動態調整方法。(2) The present invention also provides an OLED display device, which includes at least one display driver chip and an OLED display panel, and the display driver chip has a look-up table and an initialization voltage adjustment unit, so as to be able to perform the aforementioned initialization of the present invention Voltage dynamic adjustment method.
(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OLED顯示裝置。並且,該資訊處理裝置是選自於由智能手機、智能手錶、智能手環、平板電腦、筆記型電腦、一體式電腦、門禁裝置、和電子式門鎖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 aforementioned OLED display device of the present invention. Moreover, the information processing device is an electronic device selected from the group consisting of smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, access control devices, and electronic door locks .
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 what is disclosed in the above-mentioned case is a preferred embodiment, and all partial changes or modifications derived from the technical ideas of this case and easily deduced by those familiar with the technology are all inseparable from 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, the purpose, means and efficacy of this case all show that it is very different from the conventional technology, and its first invention is practical, and indeed meets the patent requirements of the invention. I implore your review committee to be aware and grant a patent as soon as possible to benefit you. Society is for the Most Prayer.
1a:OLED顯示器
11a:OLED顯示面板
111a:OLED子畫素
112a:畫素電路單元
12a:閘極驅動單元
13a:源極驅動單元
14a:顯示控制器
15a:電壓轉換單元
1:OLED顯示裝置
11:OLED顯示面板
111:OLED子畫素
112:畫素電路單元
12:顯示驅動晶片
121:查找表
122:初始化電壓調整單元
S1:依據前一幀顯示數據計算出一第一平均顯示數據,且依據當前幀顯示數據計算出一第二平均顯示數據
S2:依據該第一平均顯示數據和該第二平均顯示數據而自一查找表中查找出一當前幀初始化電壓
S3:在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為所述畫素電路單元的一初始化電壓
S4:在執行復位及下一幀顯示數據的寫入時,以一參考初始化電壓作為所述畫素電路單元的該初始化電壓
1a:
圖1為習知的一種OLED顯示器的方塊圖; 圖2為圖1所示之OLED顯示面板的正視圖; 圖3為圖1所示之畫素電路單元的電路拓樸結構圖; 圖4為圖3所示之閘極電壓的工作時序圖; 圖5為圖3所示之OLED電流的工作時序圖; 圖6為顯示應用有本發明之一種初始化電壓動態調整方法的一OLED顯示裝置的方塊圖; 圖7為圖6所示之查找表的一三維座標軸之示例圖;圖8為圖6所示之查找表的示範表圖;圖9為本發明之一種初始化電壓動態調整方法的流程圖;以及圖10為圖6所示之OLED電流的工作時序圖。 FIG. 1 is a block diagram of a known OLED display; FIG. 2 is a front view of the OLED display panel shown in FIG. 1; FIG. 3 is a circuit topology diagram of the pixel circuit unit shown in FIG. 1; FIG. 4 is a working timing diagram of the gate voltage shown in FIG. 3; FIG. 5 is a working timing diagram of the OLED current shown in FIG. 3; FIG. 6 is a block diagram showing an OLED display device applied with a method for dynamically adjusting an initialization voltage of the present invention; Fig. 7 is an exemplary diagram of a three-dimensional coordinate axis of the look-up table shown in Fig. 6; Fig. 8 is an exemplary table diagram of the look-up table shown in Fig. 6; Fig. 9 is a flowchart of a method for dynamically adjusting initialization voltage of the present invention; and FIG. 10 is a working timing diagram of the OLED current shown in FIG. 6 .
S1:依據前一幀顯示數據計算出一第一平均顯示數據,且依據當前幀顯示數據計算出一第二平均顯示數據 S1: Calculate a first average display data based on the previous frame display data, and calculate a second average display data based on the current frame display data
S2:依據該第一平均顯示數據和該第二平均顯示數據而自一查找表中查找出一當前幀初始化電壓 S2: Find a current frame initialization voltage from a lookup table according to the first average display data and the second average display data
S3:在執行復位及當前幀顯示數據的寫入時,以所述當前幀初始化電壓作為所述畫素電路單元的一初始化電壓 S3: When performing reset and writing of the display data of the current frame, using the initialization voltage of the current frame as an initialization voltage of the pixel circuit unit
S4:在執行復位及下一幀顯示數據的寫入時,以一參考初始化電壓作為所述畫素電路單元的該初始化電壓 S4: When performing reset and writing of the display data of the next frame, use a reference initialization voltage as the initialization voltage of the pixel circuit unit
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