TWI783567B

TWI783567B - Drive device and control method for a display

Info

Publication number: TWI783567B
Application number: TW110125479A
Authority: TW
Inventors: 葉儀晧; 謝坤霖; 陳翰緯; 林嘉興
Original assignee: 義隆電子股份有限公司
Priority date: 2020-07-29
Filing date: 2021-07-12
Publication date: 2022-11-11
Also published as: TW202205251A

Abstract

A driving device for a display includes an image processing circuit, a display driver, and a light driver. The image processing circuit compensating a first image data according to a brightness data to generate a compensation image data. The display driver controls a display panel of the display to show an image according to the compensation image data between a first time point and a second time point. The light source driver updates a brightness of a backlight plate of the display based on the brightness data at a third point between the first time point and the second time point.

Description

顯示器的驅動裝置及控制方法Display drive device and control method

本發明是有關一種顯示器，特別是調整顯示器背光板亮度的方法。The invention relates to a display, in particular to a method for adjusting the brightness of the backlight panel of the display.

傳統的液晶顯示器包括一顯示面板及一背光板，顯示面板與背光板的控制需要配合以提昇影像的品質，因此顯示面板與背光板的時序控制便成了相當重要的課題。A traditional liquid crystal display includes a display panel and a backlight. The control of the display panel and the backlight needs to be coordinated to improve image quality. Therefore, the timing control of the display panel and the backlight has become a very important issue.

本發明的目的，在於提出一種顯示器的驅動裝置及控制方法。The object of the present invention is to provide a display driving device and a control method.

根據本發明，一種顯示器的驅動裝置包括一影像處理電路、一顯示驅動器以及一光源驅動器。該影像處理電路根據一亮度資料對一第一影像資料進行補償以產生一補償影像資料。該顯示驅動器根據該補償影像資料控制該顯示器的顯示面板在一第一時間點與一第二時間點之間顯示一影像。該光源驅動器在該第一時間點與第二時間點之間的一第三時間點，根據該亮度資料更新該顯示器的背光板的亮度。According to the present invention, a display driving device includes an image processing circuit, a display driver and a light source driver. The image processing circuit compensates a first image data according to a brightness data to generate a compensated image data. The display driver controls the display panel of the display to display an image between a first time point and a second time point according to the compensated image data. The light source driver updates the brightness of the backlight panel of the display according to the brightness data at a third time point between the first time point and the second time point.

根據本發明，一種顯示器的控制方法，包括下列步驟：根據一亮度資料對一第一影像資料進行補償獲得一補償影像資料；根據該補償影像資料控制該顯示器的顯示面板在一第一時間點與一第二時間點之間顯示一影像；以及在該第一時間點與第二時間點之間的一第三時間點，根據該亮度資料更新該顯示器的背光板的亮度。According to the present invention, a method for controlling a display includes the following steps: compensating a first image data according to a luminance data to obtain a compensated image data; controlling the display panel of the display according to the compensated image data at a first time point and An image is displayed between a second time point; and at a third time point between the first time point and the second time point, the brightness of the backlight panel of the display is updated according to the brightness data.

本發明可以改善影像品質，進而改善視覺效果。The invention can improve the image quality and further improve the visual effect.

在具有區域調光系統(local dimming system)的液晶顯示器中，影像資料需要依據背光板的亮度資料進行補償。圖1提供一多幀連續影像的示意圖，其中包括第M-2~M+1幀(frame)的影像資料。圖2及圖3分別顯示液晶顯示器中顯示面板及背光板的兩種更新時序。如圖2與圖3所示，顯示面板具有n條掃描線L₁ ~L_n (圖中未示出)根據補償後的影像資料a~c與a’~c’依序更新。掃描線L₁ 是在時間t₁ 更新，掃描線L_n/4 是在時間t_n/4 更新，掃描線L_n/2 是在時間t_n/2 ，掃描線L_n 是在時間t_n 更新。背光板具有多個發光元件(例如發光二極體)。背光板根據一亮度資料控制該多個發光元件的亮度。背光板的亮度資料是根據影像資料來決定，並且用於補償影像資料。在圖2與圖3中，背光板的亮度資料A是根據圖1第M-2幀影像資料所決定的。背光板的亮度資料B是根據圖1第M-1幀影像資料所決定的。背光板的亮度資料C是根據圖1第M幀影像資料所決定的。In a liquid crystal display with a local dimming system, the image data needs to be compensated according to the brightness data of the backlight. FIG. 1 provides a schematic diagram of a multi-frame continuous image, which includes image data of the M-2-M+1th frame (frame). FIG. 2 and FIG. 3 respectively show two updating sequences of the display panel and the backlight panel in the liquid crystal display. As shown in FIG. 2 and FIG. 3 , the display panel has n scanning lines L ₁ -L _n (not shown in the figure) which are sequentially updated according to the compensated image data a - c and a' - c'. Scan line L1 is updated at time _t1 , scan line _Ln/4 _is updated at time tn _/4 , scan line _Ln/2 is updated at time tn _/2 , scan line _Ln is updated at time _tn . The backlight panel has a plurality of light emitting elements (such as light emitting diodes). The backlight board controls the brightness of the plurality of light-emitting elements according to a brightness data. The brightness data of the backlight is determined according to the image data and used to compensate the image data. In FIG. 2 and FIG. 3 , the brightness data A of the backlight panel is determined according to the image data of frame M-2 in FIG. 1 . The brightness data B of the backlight is determined according to the image data of frame M-1 in FIG. 1 . The brightness data C of the backlight is determined according to the image data of frame M in FIG. 1 .

由於顯示面板是逐條更新掃描線L₁ ~L_n 的影像資料，而背光板是同時更新其所有發光元件的亮度，因此兩者存在著不匹配。在圖2的例子中，第M-1幀補償後的影像資料a是根據下一幀的亮度資料B補償第M-1幀影像所獲得，第M幀補償後的影像資料b是根據下一幀的亮度資料C補償第M幀影像所獲得。在顯示器顯示第M-1幀補償後的影像資料a的過程中，掃描線L₁ 在時間t₁ a更新的資料會維持一個幀的時間，直到時間t₁ b才會被再次更新。由於第M-1幀補償後的影像資料A是根據亮度資料B補償第M-1幀影像所獲得，因此，掃描線L1在時間t₁ a更新的資料所匹配的亮度資料是B。但由於背光板根據亮度資料B更新亮度的時間點較顯示器開始顯示影像資料a的時間點晚了一個幀的時間，因此，掃描線L₁ 在時間t₁ a更新的資料與背光板的亮度只有在時段CP₁ 才匹配。同理，掃描線L_n/4 在時間t_n/4 a更新的資料與背光板的亮度只有在時段CP₂ 才匹配，掃描線L_n/2 在時間t_n/2 a更新的資料與背光板的亮度只有在時段CP₃ 才匹配，掃描線L_n 在時間t_n a更新的資料與背光板的亮度只有在時段CP_n 才匹配。Because the display panel updates the image data of the scanning lines L ₁ ~L _n one by one, while the backlight panel updates the brightness of all its light-emitting elements at the same time, so there is a mismatch between the two. In the example shown in Figure 2, the compensated image data a of the M-1th frame is obtained by compensating the M-1th frame image based on the brightness data B of the next frame, and the compensated image data b of the M-th frame is obtained according to the next frame The luminance data C of the frame is obtained by compensating the image of the Mth frame. During the process of displaying the compensated image data a of frame M− ₁ on the display, the updated data of the scanning line L1 at time t1a will last for _one frame, and will not be updated again until time _t1b . Since the compensated image data A of the M−1 frame is obtained by compensating the M−1 frame image according to the luminance data B, the luminance data matched by the updated data of the scanning line L1 at time t ₁ a is B. However, since the time point when the backlight updates the luminance according to the luminance data B is one frame later than the time point when the display starts to display the image data a, the updated data of the scan line L1 at time t ₁ _a is only equal to the luminance of the backlight board Matches are only made during period CP ₁ . Similarly, the updated data of scanning line L _n/4 at time t _n/4 a matches the brightness of the backlight panel only in period CP ₂ , and the updated data of scanning line L _n/2 at time t _n/2 a matches the brightness of the backlight panel. The brightness of the panel matches only during the period CP ₃ , and the updated data of the scanning line L _n at time t _n a matches the brightness of the backlight panel only during the period CP _n .

在圖3的例子中，第M-1幀補償後的影像資料a’是根據同一幀的亮度資料A補償第M-1幀影像所獲得，第M幀補償後的影像資料b’是根據同一幀的亮度資料B補償第M幀影像所獲得。在顯示器顯示第M幀補償後的影像資料b’的過程中，掃描線L₁ 在時間t₁ b更新的資料會維持一個幀的時間，直到時間t₁ c才會被再次更新。由於第M幀補償後的影像資料a是根據亮度資料B補償第M-1幀影像所獲得，因此，掃描線L₁ 在時間t₁ b更新的資料所匹配的亮度資料是B。但由於掃描線L₁ ~L_n 是是依序更新，並且時間點都跟背光板根據亮度資料B更新亮度的時間點不同。因此，掃描線L₁ 在時間t₁ b更新的資料與背光板的亮度只有在時段CP₁ 才匹配。同理，掃描線L_n/4 在時間t_n/4 b更新的資料與背光板的亮度只有在時段CP₂ 才匹配，掃描線L_n/2 在時間t_n/2 b更新的資料與背光板的亮度只有在時段CP₃ 才匹配，掃描線L_n 在時間t_n b更新的資料與背光板的亮度只有在時段CP_n 才匹配。In the example shown in Figure 3, the compensated image data a' of the M-1th frame is obtained by compensating the M-1th frame image based on the luminance data A of the same frame, and the compensated image data b' of the M-th frame is obtained based on the same The brightness data B of the frame is obtained by compensating the image of the Mth frame. During the process of displaying the compensated image data b' of the Mth frame on the display, the updated data of the scan line L ₁ at time t ₁ b will last for one frame, and will not be updated again until time t ₁ c. Since the compensated image data a of the Mth frame is obtained by compensating the M- _1th frame image according to the brightness data B, the brightness data matched by the updated data of the scanning line L1 at time _t1b is B. However, since the scanning lines L ₁ -L _n are updated sequentially, and the time points are different from the time points when the backlight panel updates the luminance according to the luminance data B. Therefore, the updated data _of the scan line L1 at the time _t1b matches the brightness _of the backlight panel only during the time period CP1. Similarly, the data updated by scanning line L _n/4 at time t _n/4 b matches the brightness of the backlight panel only in period CP ₂ , and the data updated by scanning line L _n/2 at time t _n/2 b matches the brightness of the backlight panel. The brightness of the panel matches only during the period CP ₃ , and the updated data of the scanning line L _n at time t _n b matches the brightness of the backlight panel only during the period CP _n .

圖4顯示本發明用以驅動顯示器10的驅動裝置20。圖5是圖4中的顯示器10的實施例。參照圖4及圖5，顯示器10包含一顯示面板12及一背光板14。顯示面板12包括多個顯示區域122，每一個顯示區域122包含多個像素(圖中未示)用以顯示圖像。背光板14位於顯示面板12的下方且具有多個發光區域142，該多個發光區域142分別對應多個顯示區域122，每一個發光區域142包含多個發光元件(圖中未示)，例如發光二極體。參照圖4，驅動裝置20包括一影像處理電路22、一顯示驅動器24及一光源驅動器26。影像處理電路22依序接收影像資料P1與影像資料P2，其中影像資料P1與影像資料P2是代表連續的兩個幀的影像。影像處理電路22在接收影像資料P1後，根據影像資料P1決定一亮度資料B。接著當影像處理電路22接收到影像資料P2後，影像處理電路22會根據亮度資料B對影像資料P2進行補償以產生一補償影像資料Pc。影像處理電路22除了輸出補償影像資料Pc及亮度資料B分別給顯示驅動器24及光源驅動器26之外，影像處理電路22還會提供一垂直同步信號Vsync及一亮度更新信號S分別給顯示驅動器24及光源驅動器26。FIG. 4 shows the driving device 20 for driving the display 10 of the present invention. FIG. 5 is an embodiment of the display 10 in FIG. 4 . Referring to FIGS. 4 and 5 , the display 10 includes a display panel 12 and a backlight 14 . The display panel 12 includes a plurality of display areas 122 , and each display area 122 includes a plurality of pixels (not shown in the figure) for displaying images. The backlight 14 is located below the display panel 12 and has a plurality of light-emitting regions 142, the plurality of light-emitting regions 142 correspond to the plurality of display regions 122, and each light-emitting region 142 includes a plurality of light-emitting elements (not shown), such as light emitting diode. Referring to FIG. 4 , the driving device 20 includes an image processing circuit 22 , a display driver 24 and a light source driver 26 . The image processing circuit 22 sequentially receives the image data P1 and the image data P2, wherein the image data P1 and the image data P2 are images representing two consecutive frames. After receiving the image data P1, the image processing circuit 22 determines a brightness data B according to the image data P1. Then, when the image processing circuit 22 receives the image data P2, the image processing circuit 22 compensates the image data P2 according to the brightness data B to generate a compensated image data Pc. In addition to outputting the compensated image data Pc and brightness data B to the display driver 24 and the light source driver 26 respectively, the image processing circuit 22 also provides a vertical synchronization signal Vsync and a brightness update signal S to the display driver 24 and the light source driver 26 respectively. Light source driver 26.

圖6顯示圖4中顯示面板12及背光板14的更新時序。基於簡潔，圖6的實施例僅以兩幀連續的影像為例作為說明，但本發明並不以此為限，熟習本技術領域之人士當能理解圖6，並且應用到連續多幀的影像。參照圖4及圖6，在圖6中，垂直同步信號Vsync1位於時間點T1，垂直同步信號Vysnc2位於時間點T2，垂直同步信號Vsync3位於時間點T3。相鄰的兩個垂直同步信號Vsync之間為一個顯示時段。在時間點T1至T2的這個顯示時段，顯示驅動器24根據來自影像處理電路22的補償影像資料Pc控制顯示面板12顯示一影像。如前所述，補償影像資料Pc是根據亮度資料B對影像資料P2進行補償而產生，而亮度資料B是根據影像資料P1計算出來的。顯示驅動器24因應在時間點T1的垂直同步信號Vsync1，在時間點t₁ a與t_n a之間依序更新顯示面板12的多條掃描線L₁ ~L_n 的資料。第一條掃描線L₁ 是在時間t₁ a更新，掃描線L_n/4 是在時間t_n/4 a更新，掃描線L_n/2 是在時間t_n/2 a，最後一條掃描線L_n 是在時間t_n a更新。垂直同步信號Vsync1所在的時間點T1與的更新第一條掃描線L₁ 的時間點t₁ a之間有一時間差Δt1，而更新最條一條掃描線L_n 的時間點t_n a與垂直同步信號Vsync2所在的時間點T2 之間有一時間差Δt2。由於差值Δt1與Δt2很小，實務上幾乎可忽略不計。FIG. 6 shows the update sequence of the display panel 12 and the backlight 14 in FIG. 4 . Based on brevity, the embodiment of FIG. 6 only takes two consecutive frames of images as an example for illustration, but the present invention is not limited thereto. Those familiar with the technical field should be able to understand FIG. 6 and apply it to continuous multiple frames of images . Referring to FIG. 4 and FIG. 6 , in FIG. 6 , the vertical synchronization signal Vsync1 is at the time point T1 , the vertical synchronization signal Vysnc2 is at the time point T2 , and the vertical synchronization signal Vsync3 is at the time point T3 . A display period is between two adjacent vertical synchronous signals Vsync. During the display period from time point T1 to T2 , the display driver 24 controls the display panel 12 to display an image according to the compensated image data Pc from the image processing circuit 22 . As mentioned above, the compensated image data Pc is generated by compensating the image data P2 according to the brightness data B, and the brightness data B is calculated according to the image data P1. The display driver 24 sequentially updates the data of the plurality of scan lines L ₁ -L _n of the display panel 12 between the time points t ₁ a and t _na in response to the vertical synchronization signal Vsync1 at the time point T1 . The first scan line L ₁ is updated at time t ₁ a, scan line L _n/4 is updated at time t _n/4 a, scan line L _n/2 is updated at time t _n/2 a, and the last scan line L _n is updated at time t _n a. There is a time difference Δt1 between the time point T1 of the vertical synchronization signal Vsync1 and the time point t ₁ a of updating the first scanning line L ₁ , and the time point t _n a of updating the last scanning line L _n is the same as the vertical synchronization signal There is a time difference Δt2 between the time points T2 where Vsync2 is located. Since the difference Δt1 and Δt2 are very small, they are practically negligible.

圖6所示的控制方法的特徵之一，是光源驅動器26在時間點T1與時間點T2之間(或者更準確的說是在時間點t₁ a與t_n a之間)的時間點T4 ，根據亮度資料B更新背光板14的亮度。具體來說，光源驅動器26因應收到的亮度更新信號S，在時間點T4根據亮度資料B更新背光板14的亮度。亮度資料B包括多個區域資料(圖中未示)分別對應背光板14的多個發光區域142。在一實施例中，每個發光區域142包括一個或多個發光元件(例如發光二極體)。光源驅動器26根據多個區域資料分別控制每一個發光區域142的所有發光元件的亮度。在一實施例中，時間點T4是在時間點T1及時間點T2的中間。在另一實施例中，時間點T4為時間點t_n/2 a，也就是在更新第一條掃描線L₁ 的時間點t₁ a與更新最條一條掃描線L_n 的時間點t_n a的中間。One of the characteristics of the control method shown in FIG. 6 is that the light source driver 26 is at the time point T4 between the time point T1 and the time point T2 (or more precisely, between the time points t ₁ a and t _na ). , update the brightness of the backlight panel 14 according to the brightness data B. Specifically, the light source driver 26 updates the brightness of the backlight panel 14 according to the brightness data B at the time point T4 in response to the brightness update signal S received. The luminance data B includes a plurality of area data (not shown in the figure) respectively corresponding to a plurality of light emitting areas 142 of the backlight panel 14 . In one embodiment, each light emitting area 142 includes one or more light emitting elements (such as light emitting diodes). The light source driver 26 separately controls the brightness of all the light emitting elements in each light emitting region 142 according to a plurality of region data. In one embodiment, the time point T4 is in the middle of the time point T1 and the time point T2. In another embodiment, the time point T4 is the time point t _n/2 a, that is, the time point t ₁ a for updating the first scan line L ₁ and the time point t _n for updating the last scan line L _n the middle of a.

相較於圖2的控制方法，圖6的控制方法可以被理解為是延後背光板14的更新時間，使更新背光板14亮度的時間點T4晚於時間點T1。或者，更準確的來說，是使更新背光板14亮度的時間點T4晚於更新第一條掃描線L1的時間點t₁ a。Compared with the control method in FIG. 2 , the control method in FIG. 6 can be understood as delaying the update time of the backlight panel 14 , so that the time point T4 for updating the brightness of the backlight panel 14 is later than the time point T1 . Or, more precisely, the time point T4 for updating the brightness of the backlight panel 14 is later than the time point t ₁ a for updating the first scan line L1.

根據圖6的時序，掃描線L₁ 在時間t₁ a更新的資料與背光板14的亮度在時段CP₁ 匹配，掃描線L_n/4 在時間t_n/4 a更新的資料與背光板14的亮度在時段CP_n/4 匹配，掃描線L_n/2 在時間t_n/2 a更新的資料與背光板14的亮度在時段CP_n/2 匹配，掃描線L_n 在時間t_n a更新的資料與背光板14的亮度在時段CP_n 匹配。According to the timing sequence in FIG. 6 , the updated data of scanning line L1 at time _t1a matches the brightness of backlight panel 14 at period CP1, and the updated data of scanning line _Ln/4 _at time tn _/ _4a matches the brightness of backlight panel 14 The brightness of the scan line _Ln/2 is matched at the period CP _n/4 , and the data updated at the time t _n/2 a is matched with the brightness of the backlight panel 14 at the period CP _n/2 , and the scan line _Ln is updated at the time t _n a The data of is matched with the brightness of the backlight panel 14 in the period CP _n .

在圖2與圖3中，時段CP₁ 和CP_n 的差值過大，可能導致顯示面板上方和下方的顏色或亮度出現明顯差異，造成較差的視覺效果。相較於圖2或圖3的時序圖，圖6的時段CP₁ ~CP_n 顯示較為均勻，並且時段CP₁ ~CP_n 中的最大值與小值的差異明顯變小。因此，圖6的控制方法將可獲得較佳的視覺效果。In FIG. 2 and FIG. 3 , the difference between the time intervals CP ₁ and CP _n is too large, which may lead to obvious differences in color or brightness between the upper and lower sides of the display panel, resulting in poor visual effects. Compared with the timing diagram in FIG. 2 or FIG. 3 , the periods CP ₁ -CP _n in FIG. 6 are relatively uniform, and the difference between the maximum value and the minimum value in the period CP ₁ -CP _n is significantly smaller. Therefore, the control method in FIG. 6 can obtain a better visual effect.

影像處理電路22包括一時序控制器(Timing controller)222。如圖7所示，在影像處理電路22中的時序控制器222用於接收影像資料P1及影像資料P2，並且輸出補償影像資料Pc及垂直同步信號Vsync給顯示驅動器24，輸出亮度資料B及亮度更新信號S給光源驅動器26。顯示驅動器24因應垂直同步信號Vsync控制顯示面板12顯示影像。光源驅動器26因應亮度更新信號S在時點間點T4更新背光板14的亮度。時序控制器222包含一延遲電路2222及一局部調光處理器2224。延遲電路222用以延遲垂直同步信號Vsync以產生亮度更新信號S，使得亮度更新信號S在垂直同步信號Vsync輸出經過一段時間後才輸出。局部調光處理器2224依序接收影像資料P1及影像資料P2。局部調光處理器2224會對所接收的影像資料P1進行處理以產生亮度資料B，再利用亮度資料B對影像資料P2進行補償以產生補償影像資料Pc。The image processing circuit 22 includes a timing controller (Timing controller) 222 . As shown in FIG. 7, the timing controller 222 in the image processing circuit 22 is used to receive the image data P1 and the image data P2, and output the compensated image data Pc and the vertical synchronization signal Vsync to the display driver 24, and output the brightness data B and brightness The update signal S is sent to the light source driver 26 . The display driver 24 controls the display panel 12 to display images in response to the vertical synchronization signal Vsync. The light source driver 26 updates the brightness of the backlight panel 14 at time point T4 in response to the brightness update signal S. The timing controller 222 includes a delay circuit 2222 and a local dimming processor 2224 . The delay circuit 222 is used to delay the vertical synchronization signal Vsync to generate the brightness update signal S, so that the brightness update signal S is output after a period of time after the vertical synchronization signal Vsync is output. The local dimming processor 2224 sequentially receives the image data P1 and the image data P2. The local dimming processor 2224 processes the received image data P1 to generate brightness data B, and then uses the brightness data B to compensate the image data P2 to generate compensated image data Pc.

請參照圖8。在另一實施例中，影像處理電路22包括一橋接晶片224及一時序控制器226。橋接晶片224依序接收影像資料P1及影像資料P2，並且輸出亮度資料B及亮度更新信號S給光源驅動器26，輸出補償影像資料Pc給時序控制器226。橋接晶片224包含一延遲電路2242及一局部調光處理器2244。延遲電路2242接收來自時序控制器226的垂直同步信號Vsync，並延遲垂直同步信號Vsync以產生亮度更新信號S，使亮度更新信號S在垂直同步信號Vsync輸出經過一段時間後才輸出。局部調光處理器2244依序接收影像資料P1及影像資料P2。局部調光處理器2244處理所接收的影像資料P1產生亮度資料B，再利用亮度資料B對影像資料P2進行補償以產生補償影像資料Pc。時序控制器226接收來自局部調光處理器2244的補償影像資料Pc，並輸出補償影像資料Pc及垂直同步信號Vsync給顯示驅動器24。顯示驅動器24因應該垂直同步信號Vsync控制顯示面板12顯示影像。Please refer to Figure 8. In another embodiment, the image processing circuit 22 includes a bridge chip 224 and a timing controller 226 . The bridge chip 224 sequentially receives the image data P1 and the image data P2 , and outputs the brightness data B and the brightness update signal S to the light source driver 26 , and outputs the compensated image data Pc to the timing controller 226 . The bridge chip 224 includes a delay circuit 2242 and a local dimming processor 2244 . The delay circuit 2242 receives the vertical synchronous signal Vsync from the timing controller 226, and delays the vertical synchronous signal Vsync to generate the brightness update signal S, so that the brightness update signal S is output after a period of time after the vertical synchronous signal Vsync is output. The local dimming processor 2244 receives the image data P1 and the image data P2 in sequence. The local dimming processor 2244 processes the received image data P1 to generate brightness data B, and then uses the brightness data B to compensate the image data P2 to generate compensated image data Pc. The timing controller 226 receives the compensated image data Pc from the local dimming processor 2244 , and outputs the compensated image data Pc and the vertical synchronization signal Vsync to the display driver 24 . The display driver 24 controls the display panel 12 to display images in response to the vertical synchronization signal Vsync.

圖9顯示光源驅動器26的實施例。圖9的光源驅動器26包括一第一選擇器261、一第二選擇器262、一第一暫存器263、一第二暫存器264、一驅動單元265及一時序控制器266。第一選擇器261連接影像處理電路22、第一暫存器263及第二暫存器264。第一選擇器261根據一選擇信號Se1依序將亮度資料B的第一部分儲存在第一暫存器263以及將該亮度資料B的第二部分儲存在第二暫存器264。第二選擇器262連接第一暫存器263及第二暫存器264，根據選擇信號Se1決定輸出該第一部分或該第二部分。驅動單元265連接第二選擇器263，根據第二選擇器262輸出的第一部分更新背光板14的第一區域的亮度，以及根據第二選擇器263輸出的第二部分更新背光板14的第二區域的亮度。時序控制器266接收亮度更新信號S，並因應亮度更新信號S產生選擇信號Se1以控制第一選擇器261與第二選擇器262依序輸出該亮度資料B的第一部分與第二部分。FIG. 9 shows an embodiment of the light source driver 26 . The light source driver 26 in FIG. 9 includes a first selector 261 , a second selector 262 , a first register 263 , a second register 264 , a driving unit 265 and a timing controller 266 . The first selector 261 is connected to the image processing circuit 22 , the first register 263 and the second register 264 . The first selector 261 sequentially stores the first part of the brightness data B in the first register 263 and stores the second part of the brightness data B in the second register 264 according to a selection signal Se1. The second selector 262 is connected to the first register 263 and the second register 264, and determines to output the first part or the second part according to the selection signal Se1. The drive unit 265 is connected to the second selector 263, updates the brightness of the first area of the backlight panel 14 according to the first part output by the second selector 262, and updates the second part of the backlight panel 14 according to the second part output by the second selector 263. The brightness of the area. The timing controller 266 receives the brightness update signal S, and generates a selection signal Se1 in response to the brightness update signal S to control the first selector 261 and the second selector 262 to sequentially output the first part and the second part of the brightness data B.

從圖9的實施例可以了解，第一暫存器263與第二暫存器264的儲存空間，小於亮度資料B的資料量。這個配置的好處是可以節省光源驅動器26內的暫存器空間，有助於縮小光源驅動器26的面積，以及節省成本。It can be understood from the embodiment of FIG. 9 that the storage space of the first register 263 and the second register 264 is smaller than the data amount of the luminance data B. Referring to FIG. The advantage of this configuration is that it can save the register space in the light source driver 26, help to reduce the area of the light source driver 26, and save cost.

在前述說明中，亮度資料B是根據影像資料P1來決定，在其他的實施例中，亮度資料B亦可以是以其他的方式來決定，例如根據影像資料P2來決定。因此，本發明提供的方法可以理解為包括以下步驟：根據一亮度資料對一影像資料進行補償獲得一補償影像資料；根據該補償影像資料控制一顯示面板在一第一時間點與一第二時間點之間顯示一影像；以及在該第一時間點與第二時間點之間的一第三時間點，根據該亮度資料更新一背光板的亮度。In the foregoing description, the brightness data B is determined according to the image data P1. In other embodiments, the brightness data B may also be determined in other ways, such as determined according to the image data P2. Therefore, the method provided by the invention can be understood as comprising the following steps: Compensating an image data according to a brightness data to obtain a compensated image data; controlling a display panel to display an image between a first time point and a second time point according to the compensated image data; and At a third time point between the first time point and the second time point, the brightness of a backlight panel is updated according to the brightness data.

以上所述僅是本發明的實施例而已，並非對本發明做任何形式上的限制，雖然本發明已以實施例揭露如上，然而並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明技術方案的範圍內，當可利用上述揭示的技術內容作出些許更動或修飾為等同變化的等效實施例，但凡是未脫離本發明技術方案的內容，依據本發明的技術實質對以上實施例所作的任何簡單修改、等同變化與修飾，均仍屬於本發明技術方案的範圍內。The above description is only an embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with the embodiment, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field, Within the scope of not departing from the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the technical essence of the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

10:顯示器 12:顯示面板 122:顯示區域 14:背光板 142:發光區域 20:驅動裝置 22:影像處理電路 222:時序控制器 2222:延遲電路 2224:局部調光處理器 224:橋接晶片 2242:延遲電路 2244:局部調光處理器 226:時序控制器 24:顯示驅動器 26:光源驅動器 261:第一選擇器 262:第二選擇器 263:第一暫存器 264:第二暫存器 265:驅動單元 266:時序控制器10: Display 12: Display panel 122: display area 14: Backlight panel 142: Luminous area 20: Drive device 22: Image processing circuit 222: Timing controller 2222: delay circuit 2224: Local Dimming Processor 224: bridge chip 2242: delay circuit 2244: Local Dimming Processor 226: Timing controller 24:Display driver 26: Light source driver 261: First selector 262: Second selector 263: The first register 264: Second register 265: drive unit 266: Timing controller

圖1顯示提供多幀連續影像的示意圖。圖2是顯示面板及背光板的更新時序的第一實施例。圖3是顯示面板及背光板的更新時序的第二實施例。圖4顯示本發明的驅動裝置的實施例。圖5顯示圖4中顯示器的實施例。圖6顯示圖4中顯示面板及背光板的更新時序的一實施例。圖7顯示圖4中影像處理電路的第一實施例。圖8顯示圖4中影像處理電路的第二實施例。圖9顯示光源驅動器的實施例。FIG. 1 shows a schematic diagram of providing multiple frames of continuous images. FIG. 2 is a first embodiment of the update sequence of the display panel and the backlight panel. FIG. 3 is a second embodiment of the refresh sequence of the display panel and the backlight panel. Fig. 4 shows an embodiment of the driving device of the present invention. FIG. 5 shows an embodiment of the display in FIG. 4 . FIG. 6 shows an embodiment of refresh sequence of the display panel and the backlight panel in FIG. 4 . FIG. 7 shows a first embodiment of the image processing circuit in FIG. 4 . FIG. 8 shows a second embodiment of the image processing circuit in FIG. 4 . Figure 9 shows an embodiment of a light source driver.

10:顯示器10: Display

12:顯示面板12: Display panel

14:背光板14: Backlight panel

20:驅動裝置20: Drive device

22:影像處理電路22: Image processing circuit

24:顯示驅動器24:Display driver

26:光源驅動器26: Light source driver

Claims

一種顯示器的驅動裝置，該顯示器包含一顯示面板及一背光板，該驅動裝置包括：一影像處理電路，執行下列操作：根據一亮度資料對一第一影像資料進行補償以產生一補償影像資料；一顯示驅動器，連接該影像處理電路，根據該補償影像資料控制該顯示面板在一第一時間點與一第二時間點之間顯示一影像；以及一光源驅動器，連接該影像處理電路，在該第一時間點與第二時間點之間的一第三時間點，根據該亮度資料開始更新該背光板的亮度。 A display driving device, the display includes a display panel and a backlight plate, the driving device includes: an image processing circuit, which performs the following operations: compensate a first image data according to a brightness data to generate a compensated image data; A display driver, connected to the image processing circuit, controls the display panel to display an image between a first time point and a second time point according to the compensated image data; and a light source driver, connected to the image processing circuit, in the At a third time point between the first time point and the second time point, the brightness of the backlight panel is updated according to the brightness data.

如請求項1的驅動裝置，其中該第三時間點在該第一時間點及該第二時間點的中間。 The driving device according to claim 1, wherein the third time point is in the middle of the first time point and the second time point.

如請求項1的驅動裝置，其中該亮度資料包括多個區域資料分別對應該背光板的多個發光區域，該光源驅動器根據該多個區域資料分別控制每一該發光區域的亮度。 The driving device according to claim 1, wherein the brightness data includes a plurality of area data respectively corresponding to a plurality of light-emitting areas of the backlight panel, and the light source driver respectively controls the brightness of each light-emitting area according to the plurality of area data.

如請求項1的驅動裝置，其中在對該第一影像資料進行補償之前，該影像處理電路執行的操作更包括：依序接收一第二影像資料與該第一影像資料；以及根據該第一影像資料或該第二影像資料決定該亮度資料。 The driving device according to claim 1, wherein before compensating the first image data, the operation performed by the image processing circuit further includes: sequentially receiving a second image data and the first image data; and according to the first image data The image data or the second image data determine the brightness data.

如請求項4的驅動裝置，其中該影像處理電路包括一時序控制器接收該第一影像資料及該第二影像資料，並且輸出該亮度資料及該補償影像資料。 The driving device according to claim 4, wherein the image processing circuit includes a timing controller to receive the first image data and the second image data, and output the brightness data and the compensation image data.

如請求項5的驅動裝置，其中該時序控制器產生一垂直同步信號及一亮度更新信號分別給該顯示驅動器及該光源驅動器，其中該顯示驅動器因應該垂直同步信號控制該顯示面板顯示該影像，該光源驅動器因應該亮度更新信號在該第三時間點更新該背光板的亮度。 The driving device as claimed in item 5, wherein the timing controller generates a vertical synchronization signal and a brightness update signal to the display driver and the light source driver respectively, wherein the display driver controls the display panel to display the image in response to the vertical synchronization signal, and the light source driver updates the backlight panel at the third time point in response to the brightness update signal brightness.

如請求項6的驅動裝置，其中該時序控制器包括：一延遲電路，連接該光源驅動器，用以延遲該垂直同步信號以產生該亮度更新信號，使該亮度更新信號在該垂直同步信號輸出經過一段時間後才輸出；一局部調光處理器，連接該顯示驅動器及該光源驅動器，處理該第二影像資料產生該亮度資料，並利用該亮度資料對該第一影像資料進行補償以產生該補償影像資料。 The driving device as claimed in claim 6, wherein the timing controller includes: a delay circuit connected to the light source driver for delaying the vertical synchronization signal to generate the brightness update signal, so that the brightness update signal passes through the output of the vertical synchronization signal output after a period of time; a local dimming processor, connected to the display driver and the light source driver, processes the second image data to generate the brightness data, and uses the brightness data to compensate the first image data to generate the compensation video material.

如請求項4的驅動裝置，其中該影像處理電路包括：一橋接晶片，接收該第一影像資料及該第二影像資料，並且輸出該亮度資料及該補償影像資料；以及一時序控制器，連接該橋接晶片及該顯示驅動器，從該橋接晶片接收該補償影像資料並將該補償影像資料傳送給該顯示驅動器。 The driving device as in claim 4, wherein the image processing circuit includes: a bridge chip, receiving the first image data and the second image data, and outputting the brightness data and the compensation image data; and a timing controller connected to The bridge chip and the display driver receive the compensation image data from the bridge chip and transmit the compensation image data to the display driver.

如請求項8的驅動裝置，其中該時序控制器產生一垂直同步信號給該顯示驅動器，該顯示驅動器因應該垂直同步信號控制該顯示面板顯示該影像。 The driving device according to claim 8, wherein the timing controller generates a vertical synchronization signal to the display driver, and the display driver controls the display panel to display the image in response to the vertical synchronization signal.

如請求項9的驅動裝置，其中該橋接晶片接收該垂直同步信號，並據以產生一亮度更新訊號輸出給該光源驅動器，該橋接晶片包括：一延遲電路，連接該時序控制器，用以延遲該垂直同步信號以產生該亮度更新信號，使該亮度更新信號在該垂直同步信號輸出經過一段時間後才輸出；以及一局部調光處理器，連接該時序控制器，處理該第二影像資料產生該亮度資料，並利用該亮度資料對該第一影像資料進行補償以產生該補償影像資料。 The driving device according to claim 9, wherein the bridge chip receives the vertical synchronous signal, and generates a brightness update signal to output to the light source driver accordingly, and the bridge chip includes: a delay circuit connected to the timing controller for delay The vertical synchronization signal is used to generate the brightness update signal, so that the brightness update signal is output after a period of time after the vertical synchronization signal is output; and a local dimming processor, connected to the timing controller, processes the second image data to generate The brightness data, and using the brightness data to compensate the first image data to generate the compensation image data.

如請求項1的驅動裝置，其中該光源驅動器包括：一第一暫存器；一第二暫存器；一第一選擇器，連接該影像處理電路、該第一暫存器及該第二暫存器，根據一選擇信號依序將該亮度資料的第一部分儲存在該第一暫存器以及將該亮度資料的第二部分儲存在該第二暫存器；一第二選擇器，連接該第一暫存器及該第二暫存器，根據該選擇信號決定輸出該第一部分或該第二部分；以及一驅動單元，連接該第二選擇器，根據該第二選擇器輸出的該第一部分更新該背光板的第一區域的亮度，以及根據該第二選擇器輸出的該第二部份分更新該背光板的第二區域的亮度。 The driving device according to claim 1, wherein the light source driver includes: a first register; a second register; a first selector connected to the image processing circuit, the first register and the second a temporary register, which sequentially stores the first part of the luminance data in the first temporary register and stores the second part of the luminance data in the second temporary register according to a selection signal; a second selector connected to The first temporary register and the second temporary register determine to output the first part or the second part according to the selection signal; and a drive unit is connected to the second selector, and according to the The first part updates the brightness of the first area of the backlight board, and updates the brightness of the second area of the backlight board according to the second part output by the second selector.

一種顯示器的控制方法，該顯示器包含一顯示面板及一背光板，該控制方法包括下列步驟：根據一亮度資料對一第一影像資料進行補償獲得一補償影像資料；根據該補償影像資料控制該顯示面板在一第一時間點與一第二時間點之間顯示一影像；以及在該第一時間點與第二時間點之間的一第三時間點，根據該亮度資料開始更新該背光板的亮度。 A method for controlling a display, the display comprising a display panel and a backlight panel, the control method comprising the following steps: compensating a first image data according to a brightness data to obtain a compensated image data; controlling the display according to the compensated image data The panel displays an image between a first time point and a second time point; and at a third time point between the first time point and the second time point, starting to update the backlight panel according to the brightness data brightness.

如請求項12的控制方法，其中該第三時間點位在該第一時間點及該第二時間點的中間。 The control method according to claim 12, wherein the third time point is located in the middle of the first time point and the second time point.

如請求項12的控制方法，其中該背光板包括多個發光區域，每一區域包括多個發光元件，該亮度資料包括多個區域資料分別對應該多個發光區域，該控制該背光板的步驟包括根據每一該區域資料分別控制每一該發光區域中的該多個發光元件的亮度。 The control method according to claim 12, wherein the backlight panel includes a plurality of light-emitting areas, each area includes a plurality of light-emitting elements, and the brightness data includes a plurality of area data respectively corresponding to the A plurality of light-emitting areas, the step of controlling the backlight includes controlling the brightness of the plurality of light-emitting elements in each of the light-emitting areas respectively according to the data of each of the areas.

如請求項12的控制方法，其中在對該第一影像資料進行補償的步驟之前，該控制方法更包括：依序接收一第二影像資料與該第一影像資料；以及根據該第一影像資料或該第二影像資料決定該亮度資料。 The control method according to claim 12, wherein before the step of compensating the first image data, the control method further includes: sequentially receiving a second image data and the first image data; and according to the first image data Or the second image data determines the brightness data.