TWI672686B - Display device and backlight control method - Google Patents

Display device and backlight control method Download PDF

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TWI672686B
TWI672686B TW107105377A TW107105377A TWI672686B TW I672686 B TWI672686 B TW I672686B TW 107105377 A TW107105377 A TW 107105377A TW 107105377 A TW107105377 A TW 107105377A TW I672686 B TWI672686 B TW I672686B
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display
backlight
light sources
image signal
pulse
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TW107105377A
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TW201935454A (en
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陳旻志
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佳世達科技股份有限公司
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Abstract

一種顯示裝置，包括顯示面板、背光單元、顯示驅動電路、以及背光驅動電路。顯示面板包括多個顯示區域。背光單元包括多個光源，分別對應多個顯示區域。顯示驅動電路用以接收影像信號，並根據影像信號計算各顯示區域對應的區域調光值，影像信號包括多個影像訊框，且顯示驅動電路依序於多個訊框區間驅動顯示面板顯示多個影像訊框，各訊框區間包括垂直遮沒區間以及資料掃描區間。背光驅動電路用以對應於各光源分別提供背光脈衝，並根據各顯示區域對應的區域調光值，調整各背光脈衝的寬度及/或強度，背光驅動電路於垂直遮沒區間提供背光脈衝。 A display device includes a display panel, a backlight unit, a display driving circuit, and a backlight driving circuit. The display panel includes a plurality of display areas. The backlight unit includes a plurality of light sources respectively corresponding to the plurality of display areas. The display driving circuit is configured to receive the image signal, and calculate a regional dimming value corresponding to each display area according to the image signal, the image signal includes a plurality of image frames, and the display driving circuit sequentially drives the display panel to display the plurality of frame intervals. An image frame, each frame interval includes a vertical blanking interval and a data scanning interval. The backlight driving circuit is configured to respectively provide backlight pulses corresponding to the respective light sources, and adjust the width and/or intensity of each backlight pulse according to the regional dimming value corresponding to each display area, and the backlight driving circuit provides backlight pulses in the vertical blanking interval.

Description

顯示裝置及背光控制方法 Display device and backlight control method

本發明是有關於一種顯示裝置，尤其是有關於用於顯示裝置的背光控制方法。 The present invention relates to a display device, and more particularly to a backlight control method for a display device.

液晶顯示器(Liquid crystal display,LCD)為目前常用的顯示螢幕，液晶面板本身屬於被動顯示，需另外對液晶面板提供背光才能顯示影像。然而液晶轉換狀態需一定的時間，若背光始終持續提供，則液晶轉換的過程亦將為使用者所觀察到，而可能產生殘影的現象，影響影片觀看品質。此外，液晶顯示是一種維持類型(hold type)的顯示裝置，亦即對於每個像素而言，像素強度值會維持定值直到下一個影像訊框被更新為新的強度值為止。由於此特性，在顯示連續的影像訊框時，影像中移動的物體在一個影像訊框中是維持靜態不動的，因而對於人眼視覺會產生動態模糊現象(motion blur)，降低了影像品質並可能造成觀賞不適感。因此，如何改善此類顯示裝置的影像動態模糊現象，乃目前業界所致力的課題之一。 A liquid crystal display (LCD) is a commonly used display screen. The liquid crystal panel itself is a passive display, and the liquid crystal panel needs to be additionally provided with a backlight to display an image. However, the liquid crystal conversion state takes a certain period of time. If the backlight is always provided continuously, the process of liquid crystal conversion will also be observed by the user, and the phenomenon of residual image may be generated, which may affect the viewing quality of the movie. In addition, the liquid crystal display is a hold type display device, that is, for each pixel, the pixel intensity value is maintained until the next image frame is updated to a new intensity value. Due to this feature, when a continuous image frame is displayed, the moving object in the image remains static in an image frame, thereby causing motion blur to the human eye and reducing image quality. May cause discomfort. Therefore, how to improve the image blurring phenomenon of such a display device is one of the current topics in the industry.

本發明係有關於一種顯示裝置及應用於該顯示裝置的背光控制方法，能夠達成區域調光並且改善顯示裝置的動態模糊現象。 The present invention relates to a display device and a backlight control method applied to the display device, which can achieve area dimming and improve dynamic blurring of the display device.

根據本發明之一實施例，提出一種顯示裝置，包括顯示面板、背光單元、顯示驅動電路、以及背光驅動電路。顯示面板包括多個顯示區域。背光單元包括多個光源，分別對應多個顯示區域。顯示驅動電路用以接收影像信號，並根據影像信號計算各顯示區域對應的區域調光值，影像信號包括多個影像訊框，且顯示驅動電路依序於多個訊框區間驅動顯示面板顯示多個影像訊框，各訊框區間包括垂直遮沒區間以及資料掃描區間。背光驅動電路用以對應於各光源分別提供背光脈衝，並根據各顯示區域對應的區域調光值，調整各背光脈衝的寬度及/或強度，背光驅動電路於垂直遮沒區間提供背光脈衝。 According to an embodiment of the present invention, a display device including a display panel, a backlight unit, a display driving circuit, and a backlight driving circuit is provided. The display panel includes a plurality of display areas. The backlight unit includes a plurality of light sources respectively corresponding to the plurality of display areas. The display driving circuit is configured to receive the image signal, and calculate a regional dimming value corresponding to each display area according to the image signal, the image signal includes a plurality of image frames, and the display driving circuit sequentially drives the display panel to display the plurality of frame intervals. An image frame, each frame interval includes a vertical blanking interval and a data scanning interval. The backlight driving circuit is configured to respectively provide backlight pulses corresponding to the respective light sources, and adjust the width and/or intensity of each backlight pulse according to the regional dimming value corresponding to each display area, and the backlight driving circuit provides backlight pulses in the vertical blanking interval.

根據本發明之另一實施例，提出一種用於顯示裝置的背光控制方法，顯示裝置包括顯示面板及背光單元，背光控制方法包括下列步驟。將顯示面板劃分為多個顯示區域，其中背光單元包括多個光源，多個顯示區域分別對應多個光源。接收影像信號，影像信號包括多個影像訊框。依序於多個訊框區間顯示多個影像訊框於顯示面板，各訊框區間包括垂直遮沒區間以及資料掃描區間。根據影像信號計算各顯示區域對應的區域調光值。對應於各光源分別提供背光脈衝。於垂直遮沒區間提供背光脈衝。 以及根據各顯示區域對應的區域調光值，調整各背光脈衝的寬度及/或強度。 According to another embodiment of the present invention, a backlight control method for a display device is provided. The display device includes a display panel and a backlight unit, and the backlight control method includes the following steps. The display panel is divided into a plurality of display areas, wherein the backlight unit includes a plurality of light sources, and the plurality of display areas respectively correspond to the plurality of light sources. Receiving an image signal, the image signal includes a plurality of image frames. A plurality of image frames are displayed on the display panel in a plurality of frame intervals, and each frame interval includes a vertical blanking interval and a data scanning interval. The area dimming value corresponding to each display area is calculated according to the image signal. A backlight pulse is provided corresponding to each of the light sources. A backlight pulse is provided in the vertical blanking interval. And adjusting the width and/or intensity of each backlight pulse according to the regional dimming value corresponding to each display area.

為了對本發明之上述及其他方面有更佳的瞭解，下文特舉實施例，並配合所附圖式詳細說明如下： In order to better understand the above and other aspects of the present invention, the following detailed description of the embodiments and the accompanying drawings

10‧‧‧顯示裝置 10‧‧‧ display device

100‧‧‧顯示面板 100‧‧‧ display panel

105_1~105_4、105_M、105_N、105_n‧‧‧顯示區域 105_1~105_4, 105_M, 105_N, 105_n‧‧‧ display area

110‧‧‧背光單元 110‧‧‧Backlight unit

115_1~115_4、115_M、115_N、115_n‧‧‧光源 115_1~115_4, 115_M, 115_N, 115_n‧‧‧ light source

120‧‧‧顯示驅動電路 120‧‧‧Display drive circuit

130‧‧‧背光驅動電路 130‧‧‧Backlight drive circuit

131‧‧‧微控制器 131‧‧‧Microcontroller

S200~S206‧‧‧步驟 S200~S206‧‧‧Steps

BL、BL_1~BL_4、BL_n‧‧‧背光脈衝 BL, BL_1~BL_4, BL_n‧‧‧ backlight pulse

CH1、CH2、CHn‧‧‧通道 CH1, CH2, CHn‧‧‧ channels

COMP1、COMP2、COMPn、ISET1、ISET2、ISETn‧‧‧接腳 COMP1, COMP2, COMPn, ISET1, ISET2, ISETn‧‧‧ pins

DL‧‧‧影像資料時序信號 DL‧‧‧ image data timing signal

L1_I、L2_I、L3_I、L4_I‧‧‧光源驅動電流 L1_I, L2_I, L3_I, L4_I‧‧‧ light source drive current

L1_W、L2_W、L3_W、L4_W‧‧‧光源開啟時間 L1_W, L2_W, L3_W, L4_W‧‧‧ Light source turn-on time

SW1~SWn‧‧‧開關元件 SW1~SWn‧‧‧Switching elements

RC1~RCn‧‧‧脈衝寬度調變電路 RC1~RCn‧‧‧ pulse width modulation circuit

RS1~RSn‧‧‧電流調變電路 RS1~RSn‧‧‧current modulation circuit

TP1、TP2‧‧‧資料掃描區間 TP1, TP2‧‧‧ data scanning interval

VB1、VB2‧‧‧垂直遮沒區間 VB1, VB2‧‧‧ vertical occlusion interval

Vsync‧‧‧垂直同步信號 Vsync‧‧‧ vertical sync signal

第1圖繪示依照本發明一實施例的顯示裝置示意圖。 FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention.

第2A圖~第2C圖繪示依照本發明多個實施例的顯示面板劃分為多個顯示區域的示意圖。 2A-2C illustrate schematic diagrams of dividing a display panel into a plurality of display areas in accordance with various embodiments of the present invention.

第3圖繪示依照本發明一實施例的背光單元及背光驅動電路的示意電路圖。 FIG. 3 is a schematic circuit diagram of a backlight unit and a backlight driving circuit according to an embodiment of the invention.

第4圖繪示依照本發明一實施例的背光控制方法流程圖。 FIG. 4 is a flow chart of a backlight control method according to an embodiment of the invention.

第5圖繪示依照本發明一實施例的調整背光脈衝寬度的示意圖。 FIG. 5 is a schematic diagram of adjusting a backlight pulse width according to an embodiment of the invention.

第6圖繪示依照本發明一實施例的調整背光脈衝強度的示意圖。 FIG. 6 is a schematic diagram of adjusting backlight pulse intensity according to an embodiment of the invention.

第7圖繪示依照本發明一實施例控制各光源的開啟時間與驅動電流的示意圖。 FIG. 7 is a schematic diagram of controlling the turn-on time and driving current of each light source according to an embodiment of the invention.

第8A圖~第8E圖繪示依照本發明多個實施例具有不同時序的背光脈衝信號波形圖。 8A-8E illustrate waveform diagrams of backlight pulse signals having different timings in accordance with various embodiments of the present invention.

透射式液晶顯示器可包括顯示面板(Display Panel)以及背光單元(Backlight Unit)，背光單元包括光源以照射其前方的顯示面板，光源例如是發光二極體(Light-Emitting Diode,LED)或冷陰極螢光燈管(Cold Cathode Fluorescent Lamps,CCFL)。藉由控制背光單元的開或關操作，例如以高於人眼能察覺的頻率控制背光單元是否開啟，使得液晶像素並非於完整的影像訊框期間維持被點亮的狀態，如此可以有效減緩動態模糊的現象。 Transmissive liquid crystal display can include a display panel (Display The backlight unit includes a light source to illuminate a display panel in front of the panel, and the light source is, for example, a Light-Emitting Diode (LED) or a Cold Cathode Fluorescent Lamp (Cold Cathode Fluorescent Lamps). CCFL). By controlling the on or off operation of the backlight unit, for example, controlling whether the backlight unit is turned on at a frequency higher than the human eye can perceive, so that the liquid crystal pixel is not maintained in the illuminated state during the complete image frame, thereby effectively slowing down the dynamics. Blurred phenomenon.

第1圖繪示依照本發明一實施例的顯示裝置示意圖。顯示裝置10包括顯示面板100、背光單元110、顯示驅動電路120、以及背光驅動電路130。顯示面板100包括多個顯示區域105_1~105_4。背光單元110包括多個光源115_1~115_4，多個光源115_1~115_4分別對應多個顯示區域105_1~105_4。顯示驅動電路120用以接收影像信號，並根據影像信號計算各顯示區域105_1~105_4對應的區域調光值。背光驅動電路130用以對應於各光源115_1~115_4分別提供背光脈衝BL_1~BL_4，並根據各顯示區域105_1~105_4對應的區域調光值，調整各背光脈衝BL_1~BL_4的寬度及/或強度。 FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention. The display device 10 includes a display panel 100, a backlight unit 110, a display driving circuit 120, and a backlight driving circuit 130. The display panel 100 includes a plurality of display areas 105_1 105 105_4. The backlight unit 110 includes a plurality of light sources 115_1~115_4, and the plurality of light sources 115_1~115_4 respectively correspond to the plurality of display areas 105_1~105_4. The display driving circuit 120 is configured to receive the image signal, and calculate the regional dimming value corresponding to each of the display regions 105_1 105 105_4 according to the image signal. The backlight driving circuit 130 is configured to provide backlight pulses BL_1 BLBL_4 corresponding to the respective light sources 115_1~115_4, and adjust the width and/or intensity of each of the backlight pulses BL_1 BLBL_4 according to the regional dimming value corresponding to each of the display regions 105_1 105 105_4.

在第1圖中背光單元110包括四個光源115_1~115_4，分別可用以照亮四個顯示區域105_1~105_4，藉由於各個顯示區域105_1~105_4設置對應的光源115_1~115_4，可以實現區域調光，即可以於不同顯示區域105_1~105_4呈現不同亮度，達到提高對比度的效果。光源 115_1~115_4與顯示區域105_1~105_4的數量(以下說明書中以n表示此數量)可為彼此對應，在第1圖的例子中繪示的數量為4(n=4)，然而應當理解此僅為示例性說明，在其他實施例中光源與顯示區域的數量可以是其他數值。 In the first embodiment, the backlight unit 110 includes four light sources 115_1~115_4, which can respectively illuminate the four display areas 105_1~105_4. By setting the corresponding light sources 115_1~115_4 in the respective display areas 105_1~105_4, the area dimming can be realized. That is, different brightness can be presented in different display areas 105_1~105_4 to achieve the effect of improving contrast. light source 115_1~115_4 and the number of display areas 105_1~105_4 (the number is denoted by n in the following description) may correspond to each other, and the number shown in the example of FIG. 1 is 4 (n=4), however, it should be understood that only For illustrative purposes, the number of light sources and display areas may be other values in other embodiments.

第2A圖~第2C圖繪示依照本發明多個實施例的顯示面板劃分為多個顯示區域的示意圖。在第2A圖所示的實施例中，顯示面板100垂直劃分為M個顯示區域105_1~105_M，光源115_1~115_M設置於顯示面板100的頂側，M為大於1的正整數，n=M。在其他實施例中，光源115_1~115_M亦可設置於顯示面板100的底側，或是同時設置於顯示面板100的頂側及底側，在此並不限定。第2A圖繪示一種上下側入式背光的範例。 2A-2C illustrate schematic diagrams of dividing a display panel into a plurality of display areas in accordance with various embodiments of the present invention. In the embodiment shown in FIG. 2A, the display panel 100 is vertically divided into M display areas 105_1 105 105_M, the light sources 115_1 115 115_M are disposed on the top side of the display panel 100, and M is a positive integer greater than 1, n=M. In other embodiments, the light sources 115_1~115_M may be disposed on the bottom side of the display panel 100 or on the top side and the bottom side of the display panel 100, which are not limited herein. FIG. 2A illustrates an example of an upper and lower side-entry backlight.

在第2B圖所示的實施例中，顯示面板100水平劃分為N個顯示區域105_1~105_N，光源115_1~115_N設置於顯示面板100的左側，N為大於1的正整數，n=N。在其他實施例中，光源115_1~115_N亦可設置於顯示面板100的右側，或是同時設置於顯示面板100的左側及右側，在此並不限定。第2B圖繪示一種左右側入式背光的範例。 In the embodiment shown in FIG. 2B, the display panel 100 is horizontally divided into N display areas 105_1 105 105_N, the light sources 115_1 115 115_N are disposed on the left side of the display panel 100, and N is a positive integer greater than 1, n=N. In other embodiments, the light sources 115_1~115_N may be disposed on the right side of the display panel 100 or on the left and right sides of the display panel 100, which is not limited herein. FIG. 2B illustrates an example of a left and right side-entry backlight.

在第2C圖所示的實施例中，顯示面板100以M行N列劃分為(M×N)個顯示區域105_1~105_n，例如劃分為二維排列的多個矩形區域，顯示區域105_1~105_n皆為矩形，光源115_1~115_n可分別設置於對應顯示區域105_1~105_n的位置，M與N皆為大於1的正整數，n=M×N。第2C圖繪示一種直下 式背光的範例。 In the embodiment shown in FIG. 2C, the display panel 100 is divided into (M×N) display regions 105_1 to 105_n in M rows and N columns, for example, divided into a plurality of rectangular regions arranged in two dimensions, and the display regions 105_1 105 105_n All of them are rectangular, and the light sources 115_1~115_n can be respectively disposed at positions corresponding to the display areas 105_1~105_n, and both M and N are positive integers greater than 1, and n=M×N. Figure 2C shows a straight down An example of a backlight.

第3圖繪示依照本發明一實施例的背光單元及背光驅動電路的示意電路圖。在此實施例中，各光源115_1~115_n可以是包括多個LED的燈條(light bar)。背光驅動電路130可包括微控制器(microcontroller)131、多個開關元件SW1~SWn、脈衝寬度調變電路RC1~RCn、以及電流調變電路RS1~RSn。在一實施例中，微控制器131亦可以由微處理器(microprocessor)或數位信號處理電路(digital signal processor,DSP)取代。開關元件SW1~SWn分別對應光源115_1~115_n。微控制器131具有接腳COMP1、COMP2、…、COMPn、以及接腳ISET1、ISET2、...、ISETn，其中接腳COMP1與ISET1可對應至通道CH1與光源115_1，接腳COMP2與ISET2可對應至通道CH2與光源115_2，其餘依此類推。微控制器131可透過調整輸出至接腳COMP1~COMPn的信號波形，控制脈衝寬度調變電路RC1~RCn，改變開關元件SW1~SWn的開啟時間長度，以改變傳送至光源115_1~115_n的背光脈衝BL_1~BL_n的寬度。此外，微控制器131並可透過調整輸出至接腳ISET1~ISETn的電壓，使得電流調變電路RS1~RSn的電位差不同，改變光源115_1~115_n的LED驅動電流，以改變傳送至光源115_1~115_n的背光脈衝BL_1~BL_n的強度。在一實施例中，電流調變電路RS1~RSn亦可以取代為電壓調變電路，藉由改變光源115_1~115_n的偏壓，以改變背光脈衝BL_1~BL_n的強度。用以接收影像信號的顯示驅 動電路120例如包括縮放電路(scalar)。 FIG. 3 is a schematic circuit diagram of a backlight unit and a backlight driving circuit according to an embodiment of the invention. In this embodiment, each of the light sources 115_1~115_n may be a light bar including a plurality of LEDs. The backlight driving circuit 130 may include a microcontroller 131, a plurality of switching elements SW1 to SWn, pulse width modulation circuits RC1 to RCn, and current modulation circuits RS1 to RSn. In an embodiment, the microcontroller 131 can also be replaced by a microprocessor or a digital signal processor (DSP). The switching elements SW1 to SWn correspond to the light sources 115_1 to 115_n, respectively. The microcontroller 131 has pins COMP1, COMP2, ..., COMPn, and pins ISET1, ISET2, ..., ISETn, wherein the pins COMP1 and ISET1 can correspond to the channel CH1 and the light source 115_1, and the pins COMP2 and ISET2 can correspond. To channel CH2 and source 115_2, and so on. The microcontroller 131 can adjust the signal waveforms outputted to the pins COMP1 to COMPn, control the pulse width modulation circuits RC1 to RCn, and change the opening time length of the switching elements SW1 to SWn to change the backlights transmitted to the light sources 115_1~115_n. The width of the pulse BL_1~BL_n. In addition, the microcontroller 131 can adjust the voltages outputted to the pins ISET1~ISETn to make the potential difference of the current modulation circuits RS1~RSn different, and change the LED driving currents of the light sources 115_1~115_n to change the transmission to the light source 115_1~ The intensity of the backlight pulses BL_1~BL_n of 115_n. In one embodiment, the current modulation circuits RS1 RSRSn may be replaced by voltage modulation circuits to change the intensity of the backlight pulses BL_1 BLBL_n by changing the bias voltages of the light sources 115_1 115 115_n. Display drive for receiving image signals The dynamic circuit 120 includes, for example, a scalar circuit.

第4圖繪示依照本發明一實施例的背光控制方法流程圖，此背光控制方法可應用至如第1圖所示的顯示裝置10，背光控制方法包括下列步驟。步驟S200：將顯示面板劃分為多個顯示區域，其中背光單元包括多個光源，多個顯示區域分別對應多個光源。步驟S200的多個實施例可以參考第2A圖~第2C圖所示。 4 is a flow chart of a backlight control method according to an embodiment of the present invention. The backlight control method can be applied to the display device 10 as shown in FIG. 1. The backlight control method includes the following steps. Step S200: Dividing the display panel into a plurality of display areas, wherein the backlight unit comprises a plurality of light sources, and the plurality of display areas respectively correspond to the plurality of light sources. The plurality of embodiments of step S200 can be referred to the second to second embodiments.

步驟S201：接收影像信號，影像信號包括多個影像訊框。步驟S202：依序於多個訊框區間顯示多個影像訊框於顯示面板100，各訊框區間包括垂直遮沒區間(vertical blanking interval,VBI)以及資料掃描區間。步驟S201及S202可由顯示驅動電路120執行，步驟S202例如包括顯示驅動電路120依序於多個訊框區間驅動顯示面板100顯示多個影像訊框。 Step S201: Receive an image signal, where the image signal includes a plurality of image frames. Step S202: Display a plurality of video frames on the display panel 100 in sequence, and each frame interval includes a vertical blanking interval (VBI) and a data scanning interval. Steps S201 and S202 can be performed by the display driving circuit 120. Step S202 includes, for example, the display driving circuit 120 driving the display panel 100 to display a plurality of image frames in sequence.

步驟S203：根據影像信號計算各顯示區域105_1~105_n對應的區域調光值。步驟S204：對應於各光源115_1~115_n分別提供背光脈衝BL_1~BL_n。步驟S205：於垂直遮沒區間提供背光脈衝BL_1~BL_n。步驟S206：根據各顯示區域105_1~105_n對應的區域調光值，調整各背光脈衝BL_1~BL_n的寬度及/或強度。在一實施例中，步驟S203計算區域調光值可由顯示驅動電路120執行，步驟S204~S206可由背光驅動電路130執行。在另一實施例中步驟S203亦可由背光驅動電路130執行。 Step S203: Calculate the area dimming value corresponding to each of the display areas 105_1~105_n according to the image signal. Step S204: providing backlight pulses BL_1 BLBL_n corresponding to the respective light sources 115_1~115_n. Step S205: providing backlight pulses BL_1~BL_n in the vertical blanking interval. Step S206: Adjust the width and/or intensity of each of the backlight pulses BL_1 BLBL_n according to the region dimming value corresponding to each of the display regions 105_1 105 105_n. In an embodiment, the calculation of the regional dimming value by step S203 can be performed by the display driving circuit 120, and the steps S204 to S206 can be performed by the backlight driving circuit 130. In another embodiment, step S203 can also be performed by backlight driving circuit 130.

由於訊框區間包括垂直遮沒區間，且背光單元為依 據背光脈衝而間歇式地開啟，因此背光單元並非持續點亮顯示面板，故能降低動態模糊現象。此外，藉由根據各顯示區域對應的區域調光值以調整背光脈衝的寬度及/或強度，可以達到區域調光效果，進而提高影像對比度。 Since the frame interval includes a vertical blanking interval, and the backlight unit is The backlight unit is intermittently turned on according to the backlight pulse, so that the backlight unit does not continuously illuminate the display panel, so that the motion blur phenomenon can be reduced. In addition, by adjusting the width and/or intensity of the backlight pulse according to the area dimming value corresponding to each display area, the area dimming effect can be achieved, thereby improving the image contrast.

步驟S203的計算區域調光值可以有多種實施例。在一實施例中，顯示驅動電路120用以計算影像信號於各顯示區域105_1~105_n內多個像素灰階值的平均值，並根據平均值計算區域調光值，例如對於較大的像素灰階值平均值，設定較大的區域調光值。顯示驅動電路120可根據顯示區域105_1內的像素灰階值平均值設定顯示區域105_1的區域調光值，根據顯示區域105_2內的像素灰階值平均值設定顯示區域105_2的區域調光值，其餘依此類推。在另一實施例中，顯示驅動電路120用以計算影像信號於各顯示區域105_1~105_n內像素灰階值的平均值、最大值以及最小值，並根據平均值、最大值、以及最小值計算區域調光值，舉例而言，顯示驅動電路120可以設定對應於平均值、最大值、以及最小值這三個數值的權重，並計算這三個數值的加權總和(weighted sum)，據以計算區域調光值。 There are various embodiments for calculating the area dimming value of step S203. In an embodiment, the display driving circuit 120 is configured to calculate an average value of the grayscale values of the plurality of pixels in the display regions 105_1~105_n, and calculate the regional dimming value according to the average value, for example, for a larger pixel gray. Average value of the order value, set a larger area dimming value. The display driving circuit 120 can set the regional dimming value of the display region 105_1 according to the average value of the pixel grayscale values in the display region 105_1, and set the regional dimming value of the display region 105_2 according to the average value of the grayscale values of the pixels in the display region 105_2, and the rest So on and so forth. In another embodiment, the display driving circuit 120 is configured to calculate an average value, a maximum value, and a minimum value of the gray level values of the image signals in the display areas 105_1 105 105_n, and calculate according to the average value, the maximum value, and the minimum value. The area dimming value, for example, the display driving circuit 120 can set the weights corresponding to the three values of the average value, the maximum value, and the minimum value, and calculate a weighted sum of the three values, thereby calculating Regional dimming value.

在一實施例中，步驟S206可以根據各顯示區域105_1~105_n對應的區域調光值，調整各背光脈衝BL_1~BL_n的寬度，而保持各背光脈衝BL_1~BL_n的強度相同。第5圖繪示依照本發明一實施例的調整背光脈衝寬度的示意圖，在第5圖所示的實施例中，於影像資料時序信號DL致能(enable)的期間為資料 掃描期間TP1、TP2，影像資料可以於資料掃描期間TP1、TP2提供至顯示面板100；於影像資料時序信號DL禁能(disable)的期間為垂直遮沒期間VB1、VB2，背光驅動電路130於垂直遮沒期間VB1、VB2提供背光脈衝BL_1~BL_4。各個背光脈衝BL_1~BL_4可具有相同的脈衝強度(如第5圖所示，波形的高度相同)，背光驅動電路130用以根據各顯示區域105_1~105_4對應的區域調光值，調整各背光脈衝BL_1~BL_4的寬度。舉例而言，對於越大的區域調光值，可給予越大的背光脈衝寬度，以達到較高的亮度。 In an embodiment, step S206 can adjust the width of each backlight pulse BL_1~BL_n according to the regional dimming value corresponding to each display area 105_1~105_n, and keep the intensity of each backlight pulse BL_1~BL_n the same. FIG. 5 is a schematic diagram of adjusting the pulse width of the backlight according to an embodiment of the invention. In the embodiment shown in FIG. 5, the period during which the image data timing signal DL is enabled is data. During the scanning period TP1, TP2, the image data may be provided to the display panel 100 during the data scanning period TP1, TP2; during the video data timing signal DL disable period, the vertical blanking period VB1, VB2, and the backlight driving circuit 130 are vertical. During the blanking period, VB1 and VB2 provide backlight pulses BL_1 to BL_4. Each backlight pulse BL_1~BL_4 can have the same pulse intensity (as shown in FIG. 5, the height of the waveform is the same), and the backlight driving circuit 130 is configured to adjust each backlight pulse according to the regional dimming value corresponding to each display area 105_1~105_4. The width of BL_1~BL_4. For example, for larger regional dimming values, a larger backlight pulse width can be imparted to achieve higher brightness.

在另一實施例中，步驟S206可以根據各顯示區域105_1~105_n對應的區域調光值，調整各背光脈衝BL_1~BL_n的強度，而保持各背光脈衝BL_1~BL_n的寬度相同。第6圖繪示依照本發明一實施例的調整背光脈衝強度的示意圖，其中各個背光脈衝BL_1~BL_4可具有相同的脈衝寬度，背光驅動電路130用以根據各顯示區域105_1~105_4對應的區域調光值，調整各背光脈衝BL_1~BL_4的強度。在第6圖中各背光脈衝BL_1~BL_4波形中的水平虛線代表背光脈衝的最大脈衝強度，可以看出各背光脈衝BL_1~BL_4具有不同強度，且一個背光脈衝在不同的垂直遮沒期間VB1、VB2亦具有不同強度。舉例而言，對於越大的區域調光值，可給予越大的背光脈衝強度，以達到較高的亮度。 In another embodiment, step S206 may adjust the intensity of each backlight pulse BL_1~BL_n according to the regional dimming value corresponding to each display area 105_1~105_n, and keep the widths of the backlight pulses BL_1~BL_n the same. 6 is a schematic diagram of adjusting backlight pulse intensity according to an embodiment of the present invention, wherein each backlight pulse BL_1~BL_4 may have the same pulse width, and the backlight driving circuit 130 is configured to adjust the area corresponding to each display area 105_1~105_4. The light value adjusts the intensity of each backlight pulse BL_1~BL_4. In the sixth figure, the horizontal dotted line in each of the backlight pulses BL_1~BL_4 represents the maximum pulse intensity of the backlight pulse, and it can be seen that each of the backlight pulses BL_1~BL_4 has different intensities, and one backlight pulse is in different vertical blanking periods VB1. VB2 also has different strengths. For example, for larger regional dimming values, a greater backlight pulse intensity can be imparted to achieve higher brightness.

關於如第6圖所示的調整背光脈衝強度，一種實作方式可以參考第7圖，其繪示依照本發明一實施例控制各光源的開啟 時間與驅動電流的示意圖。在第7圖所示的實施例中，相關控制信號還可包括垂直同步信號Vsync，用以控制顯示信號驅動時序。在一實施例中，顯示驅動電路120可在確認收到垂直同步信號Vsync之後，並確認整張影像的資料已經就緒後，計算各顯示區域105_1~105_4的區域調光值，接著由背光驅動電路130根據區域調光值產生背光脈衝BL_1~BL_4。在第7圖所示的實施例中，背光驅動電路130可控制各個光源的光源開啟時間L1_W、L2_W、L3_W、L4_W皆保持相同，背光驅動電路130根據各顯示區域105_1~105_4的區域調光值設定各個光源的光源驅動電流L1_I、L2_I、L3_I、L4_I。如第7圖所示的光源開啟時間L1_W以及光源驅動電流L1_I，可產生如第6圖所示的背光脈衝BL_1，類似地，光源開啟時間L2_W以及光源驅動電流L2_I可產生背光脈衝BL_2，其餘依此類推。由於在此實施例中，光源開啟時間L1_W、L2_W、L3_W、L4_W相同，背光脈衝BL_1~BL_4可具有相同的責任週期(duty cycle)。亦即，在第7圖所示的實施例中，藉由固定責任週期與變動電流的方式，能夠達到兼具區域調光與降低動態模糊的效果。 For adjusting the backlight pulse intensity as shown in FIG. 6, an implementation manner may refer to FIG. 7, which illustrates controlling the opening of each light source according to an embodiment of the invention. Schematic diagram of time and drive current. In the embodiment shown in FIG. 7, the correlation control signal may further include a vertical synchronization signal Vsync for controlling the display signal driving timing. In an embodiment, the display driving circuit 120 can calculate the regional dimming value of each display area 105_1~105_4 after confirming that the vertical synchronization signal Vsync is received, and confirm that the data of the entire image is ready, and then the backlight driving circuit. 130 generates backlight pulses BL_1~BL_4 according to the regional dimming value. In the embodiment shown in FIG. 7, the backlight driving circuit 130 can control the light source on-times L1_W, L2_W, L3_W, and L4_W of the respective light sources to remain the same, and the backlight driving circuit 130 adjusts the light dimming value according to the regions of the display regions 105_1 105 105_4. The light source driving currents L1_I, L2_I, L3_I, and L4_I of the respective light sources are set. The light source turn-on time L1_W and the light source drive current L1_I as shown in FIG. 7 can generate the backlight pulse BL_1 as shown in FIG. 6. Similarly, the light source turn-on time L2_W and the light source drive current L2_I can generate the backlight pulse BL_2, and the rest This type of push. Since the light source turn-on times L1_W, L2_W, L3_W, L4_W are the same in this embodiment, the backlight pulses BL_1 BL BL_4 may have the same duty cycle. That is, in the embodiment shown in Fig. 7, by combining the duty cycle and the varying current, it is possible to achieve both the effect of regional dimming and the reduction of dynamic blur.

在一實施例中，於各個訊框區間中背光脈衝BL_1~BL_4的開始時間相同，背光脈衝BL_1~BL_4的開始時間例如是背光脈衝BL_1~BL_4上升緣(rising edge)的時間點。可參考第7圖實施例，各個光源開啟時間L1_W、L2_W、L3_W、L4_W與垂直同步信號Vsync之間可以具有相同的延遲量，且在每個訊 框區間中此延遲量保持不變，光源開啟時間可以根據垂直同步信號Vsync而控制時序。此僅為示例性說明一種實作方式，在其他實施例中，於各個訊框區間中背光脈衝BL_1~BL_4的開始時間可以不相同。 In one embodiment, the start times of the backlight pulses BL_1 BLBL_4 are the same in each frame interval, and the start times of the backlight pulses BL_1 BLBL_4 are, for example, the time points of the rising edges of the backlight pulses BL_1 BL BL_4. Referring to the embodiment of Figure 7, each of the light source turn-on times L1_W, L2_W, L3_W, L4_W and the vertical sync signal Vsync may have the same amount of delay, and each message This delay amount remains unchanged in the frame interval, and the light source turn-on time can control the timing according to the vertical sync signal Vsync. This is merely an exemplary implementation. In other embodiments, the start times of the backlight pulses BL_1 BL BL_4 may be different in each frame interval.

步驟S205背光驅動電路130於垂直遮沒區間提供背光脈衝可以有多種實施例，第8A圖~第8E圖繪示依照本發明多個實施例具有不同時序的背光脈衝信號波形圖。第8A圖所示的實施例中，背光脈衝BL(可以代表第5圖、第6圖的背光脈衝BL_1~BL_4，以下不再重複贅述)的寬度與垂直遮沒區間VB1(及VB2，以下不再重複贅述)的寬度相同。第8B圖所示的實施例中，背光脈衝BL的起始時間及結束時間均位於垂直遮沒區間VB1內，背光脈衝BL的結束時間例如是背光脈衝BL下降緣(falling edge)的時間點，背光脈衝BL的寬度小於垂直遮沒區間VB1的寬度。第8C圖所示的實施例中，背光脈衝BL的起始時間位於垂直遮沒區間VB1外、背光脈衝BL的結束時間位於垂直遮沒區間VB1內。第8D圖所示的實施例中，背光脈衝BL的起始時間及結束時間均位於垂直遮沒區間VB1外，背光脈衝BL的寬度大於垂直遮沒區間VB1的寬度。第8E圖所示的實施例中，背光脈衝BL的起始時間位於垂直遮沒區間VB1內、背光脈衝BL的結束時間位於垂直遮沒區間VB1外。在第8C圖~第8E圖所示的實施例中，背光脈衝BL的致能期間可與資料掃描期間TP1部分重疊。背光驅動電路130可以如第8A圖~第8E圖所示的多個實施例控制背光脈衝BL，在這些實 施例中，背光脈衝BL的致能期間與垂直遮沒區間VB1至少部分重疊，而能達到降低動態模糊的效果。 Step S205: The backlight driving circuit 130 provides backlight pulses in the vertical blanking interval. There are various embodiments. FIGS. 8A-8E illustrate waveform diagrams of backlight pulse signals having different timings according to various embodiments of the present invention. In the embodiment shown in FIG. 8A, the backlight pulse BL (which may represent the backlight pulses BL_1 to BL_4 of FIG. 5 and FIG. 6 , which will not be described later) has a width and a vertical blanking interval VB1 (and VB2, below). Repeat the details again. The width is the same. In the embodiment shown in FIG. 8B, the start time and the end time of the backlight pulse BL are both located in the vertical blanking interval VB1, and the end time of the backlight pulse BL is, for example, the time point of the falling edge of the backlight pulse BL. The width of the backlight pulse BL is smaller than the width of the vertical blanking interval VB1. In the embodiment shown in FIG. 8C, the start time of the backlight pulse BL is outside the vertical blanking interval VB1, and the end time of the backlight pulse BL is located in the vertical blanking interval VB1. In the embodiment shown in FIG. 8D, the start time and the end time of the backlight pulse BL are both outside the vertical blanking interval VB1, and the width of the backlight pulse BL is larger than the width of the vertical blanking interval VB1. In the embodiment shown in FIG. 8E, the start time of the backlight pulse BL is located in the vertical blanking interval VB1, and the end time of the backlight pulse BL is outside the vertical blanking interval VB1. In the embodiment shown in FIGS. 8C to 8E, the enable period of the backlight pulse BL may partially overlap with the data scanning period TP1. The backlight driving circuit 130 can control the backlight pulse BL as in the plurality of embodiments shown in FIGS. 8A to 8E. In the embodiment, the enable period of the backlight pulse BL at least partially overlaps with the vertical blanking interval VB1, and the effect of reducing the motion blur can be achieved.

根據本揭露上述多個實施例的顯示裝置及背光控制方法，可藉由於多個顯示區域設置對應的光源，並依據影像資料計算各個顯示區域的調光值，而能達到區域調光的目的，例如對於高亮度的顯示區域提供亮一點的背光，以加強影像對比度。此外，更可根據區域調光值調整背光脈衝的寬度及/或強度，適當安排背光單元的開啟時間以及驅動強度，因此能夠在達到區域調光效果的同時，降低動態模糊現象。本揭露上述多個實施例可應用在多區域上下側入式、左右側入式、及直下式背光單元的調光，適用於個人電腦、筆記型電腦、平板裝置、電視、投影機等等相關領域的顯示電子產品，具有廣泛的應用範圍。 According to the display device and the backlight control method of the above embodiments, the dimming value of each display area can be calculated according to the image data, and the dimming value of each display area can be calculated according to the image data, thereby achieving the purpose of regional dimming. For example, a brighter display area provides a brighter backlight to enhance image contrast. In addition, the width and/or intensity of the backlight pulse can be adjusted according to the regional dimming value, and the opening time and driving intensity of the backlight unit can be appropriately arranged, so that the regional dimming effect can be achieved while the dynamic blurring phenomenon is reduced. The above various embodiments can be applied to dimming of multi-zone upper and lower side entry type, left and right side entry type, and direct type backlight unit, and are suitable for personal computers, notebook computers, tablet devices, televisions, projectors, etc. Display electronics in the field with a wide range of applications.

綜上所述，雖然本發明已以實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。 In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (13)

一種顯示裝置，包括：一顯示面板，包括複數個顯示區域；一背光單元，包括複數個光源，其中該些光源分別對應該些顯示區域；一顯示驅動電路，用以接收一影像信號，並根據該影像信號計算各該顯示區域對應的一區域調光值，該影像信號包括複數個影像訊框，且該顯示驅動電路依序於複數個訊框區間驅動該顯示面板顯示該些影像訊框，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；以及一背光驅動電路，用以對應於各該光源分別提供一背光脈衝，並根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度，其中該背光驅動電路於該垂直遮沒區間提供該背光脈衝；其中各該背光脈衝的寬度相同，且該背光驅動電路用以根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的強度；或者，各該背光脈衝的強度相同，且該背光驅動電路用以根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度。 A display device comprising: a display panel comprising a plurality of display areas; a backlight unit comprising a plurality of light sources, wherein the light sources respectively correspond to the display areas; a display driving circuit for receiving an image signal and according to The image signal calculates an area dimming value corresponding to each of the display areas, and the image signal includes a plurality of image frames, and the display driving circuit drives the display panel to display the image frames in sequence according to the plurality of frame intervals. Each of the frame intervals includes a vertical blanking interval and a data scanning interval; and a backlight driving circuit for respectively providing a backlight pulse corresponding to each of the light sources, and according to the dimming value of the region corresponding to each display region, Adjusting the width and/or intensity of each of the backlight pulses, wherein the backlight driving circuit provides the backlight pulse in the vertical blanking interval; wherein the backlight pulses have the same width, and the backlight driving circuit is configured to correspond to each display area The dimming value of the region adjusts the intensity of each backlight pulse; or the intensity of each backlight pulse is the same, And the backlight driving circuit is configured to adjust the width of each of the backlight pulses according to the dimming value of the region corresponding to each of the display regions. 一種顯示裝置，包括：一顯示面板，包括複數個顯示區域； 一背光單元，包括複數個光源，其中該些光源分別對應該些顯示區域；一顯示驅動電路，用以接收一影像信號，並根據該影像信號計算各該顯示區域對應的一區域調光值，該影像信號包括複數個影像訊框，且該顯示驅動電路依序於複數個訊框區間驅動該顯示面板顯示該些影像訊框，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；以及一背光驅動電路，用以對應於各該光源分別提供一背光脈衝，並根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度，其中該背光驅動電路於該垂直遮沒區間提供該背光脈衝；其中該背光脈衝的寬度與該垂直遮沒區間的寬度相同；或者，該背光脈衝的寬度小於該垂直遮沒區間的寬度。 A display device includes: a display panel including a plurality of display areas; a backlight unit includes a plurality of light sources, wherein the light sources respectively correspond to display areas; a display driving circuit is configured to receive an image signal, and calculate a regional dimming value corresponding to each display area according to the image signal, The image signal includes a plurality of image frames, and the display driving circuit drives the display panel to display the image frames in sequence, wherein each frame interval includes a vertical blanking interval and a data scanning interval. And a backlight driving circuit, configured to respectively provide a backlight pulse corresponding to each of the light sources, and adjust a width and/or intensity of each backlight pulse according to the dimming value of the region corresponding to each display area, wherein the backlight is driven The circuit provides the backlight pulse in the vertical blanking interval; wherein the width of the backlight pulse is the same as the width of the vertical blanking interval; or the width of the backlight pulse is smaller than the width of the vertical blanking interval. 一種顯示裝置，包括：一顯示面板，包括複數個顯示區域；一背光單元，包括複數個光源，其中該些光源分別對應該些顯示區域；一顯示驅動電路，用以接收一影像信號，並根據該影像信號計算各該顯示區域對應的一區域調光值，該影像信號包括複數個影像訊框，且該顯示驅動電路依序於複數個訊框區間驅動該顯示面 板顯示該些影像訊框，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；以及一背光驅動電路，用以對應於各該光源分別提供一背光脈衝，並根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度，其中該背光驅動電路於該垂直遮沒區間提供該背光脈衝；其中該背光脈衝的一起始時間及一結束時間的其中之一位於該垂直遮沒區間外；或者，該背光脈衝的該起始時間及該結束時間均位於該垂直遮沒區間外。 A display device comprising: a display panel comprising a plurality of display areas; a backlight unit comprising a plurality of light sources, wherein the light sources respectively correspond to the display areas; a display driving circuit for receiving an image signal and according to The image signal calculates an area dimming value corresponding to each display area, the image signal includes a plurality of image frames, and the display driving circuit drives the display surface sequentially in the plurality of frame intervals The panel displays the image frames, each of the frame intervals includes a vertical blanking interval and a data scanning interval, and a backlight driving circuit for respectively providing a backlight pulse corresponding to each of the light sources, and according to each of the display regions Corresponding the dimming value of the region, adjusting the width and/or intensity of each of the backlight pulses, wherein the backlight driving circuit provides the backlight pulse in the vertical blanking interval; wherein a start time and an end time of the backlight pulse are One of the ones is outside the vertical blanking interval; or both the start time and the end time of the backlight pulse are outside the vertical blanking interval. 如申請專利範圍第1項至第3項中任一項所述之顯示裝置，其中該顯示面板垂直劃分為M個該些顯示區域，該些光源設置於該顯示面板的頂側及底側的至少其中一側，M為大於1的正整數；或者，該顯示面板水平劃分為N個該些顯示區域，該些光源設置於該顯示面板的左側及右側的至少其中一側，N為大於1的正整數。 The display device according to any one of the preceding claims, wherein the display panel is vertically divided into M display areas, and the light sources are disposed on the top side and the bottom side of the display panel. At least one of the sides, M is a positive integer greater than 1; or, the display panel is horizontally divided into N of the display areas, and the light sources are disposed on at least one of the left side and the right side of the display panel, and N is greater than 1 Positive integer. 如申請專利範圍第1項至第3項中任一項所述之顯示裝置，其中該顯示面板以M行N列劃分為(M×N)個該些顯示區域，該些顯示區域為矩形，該些光源設置於對應該些顯示區域的位置，M與N皆為大於1的正整數。 The display device according to any one of the preceding claims, wherein the display panel is divided into (M×N) display areas by M rows and N columns, and the display areas are rectangular. The light sources are disposed at positions corresponding to the display areas, and both M and N are positive integers greater than one. 一種顯示裝置，包括：一顯示面板，包括複數個顯示區域；一背光單元，包括複數個光源，其中該些光源分別對應該些顯示區域；一顯示驅動電路，用以接收一影像信號，並根據該影像信號計算各該顯示區域對應的一區域調光值，該影像信號包括複數個影像訊框，且該顯示驅動電路依序於複數個訊框區間驅動該顯示面板顯示該些影像訊框，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；以及一背光驅動電路，用以對應於各該光源分別提供一背光脈衝，並根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度，其中該背光驅動電路於該垂直遮沒區間提供該背光脈衝；其中該顯示驅動電路用以計算該影像信號於各該顯示區域內複數個像素灰階值的一平均值，並根據該平均值計算該區域調光值；或者，該顯示驅動電路用以計算該影像信號於各該顯示區域內該複數個像素灰階值的該平均值、一最大值以及一最小值，並根據該平均值、該最大值、以及該最小值計算該區域調光值。 A display device comprising: a display panel comprising a plurality of display areas; a backlight unit comprising a plurality of light sources, wherein the light sources respectively correspond to the display areas; a display driving circuit for receiving an image signal and according to The image signal calculates an area dimming value corresponding to each of the display areas, and the image signal includes a plurality of image frames, and the display driving circuit drives the display panel to display the image frames in sequence according to the plurality of frame intervals. Each of the frame intervals includes a vertical blanking interval and a data scanning interval; and a backlight driving circuit for respectively providing a backlight pulse corresponding to each of the light sources, and according to the dimming value of the region corresponding to each display region, Adjusting the width and/or intensity of each of the backlight pulses, wherein the backlight driving circuit provides the backlight pulse in the vertical blanking interval; wherein the display driving circuit is configured to calculate a plurality of pixel gray levels of the image signal in each of the display regions An average value of the value, and calculating the dimming value of the region according to the average value; or, the display driving circuit is used for counting Calculating the average value, a maximum value, and a minimum value of the plurality of pixel grayscale values in the display area of the image signal, and calculating the regional dimming value according to the average value, the maximum value, and the minimum value. . 如申請專利範圍第1項至第3項中任一項所述之顯示裝置，其中該背光驅動電路包括：一脈衝寬度調變電路，用以調整該背光脈衝的寬度；以及 一電流調變電路，用以調整該背光脈衝的強度。 The display device according to any one of claims 1 to 3, wherein the backlight driving circuit comprises: a pulse width modulation circuit for adjusting a width of the backlight pulse; A current modulation circuit for adjusting the intensity of the backlight pulse. 一種用於顯示裝置的背光控制方法，該顯示裝置包括一顯示面板以及一背光單元，該背光控制方法包括：將該顯示面板劃分為複數個顯示區域，其中該背光單元包括複數個光源，該些顯示區域分別對應該些光源；接收一影像信號，該影像信號包括複數個影像訊框；依序於複數個訊框區間顯示該些影像訊框於該顯示面板，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；根據該影像信號計算各該顯示區域對應的一區域調光值；對應於各該光源分別提供一背光脈衝；於該垂直遮沒區間提供該背光脈衝；以及根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度；其中各該背光脈衝的寬度相同，並根據各該顯示區域對應的該區域調光值調整各該背光脈衝的強度；或者，各該背光脈衝的強度相同，並根據各該顯示區域對應的該區域調光值調整各該背光脈衝的寬度。 A backlight control method for a display device, the display device includes a display panel and a backlight unit, the backlight control method includes: dividing the display panel into a plurality of display areas, wherein the backlight unit comprises a plurality of light sources, The display area respectively corresponds to the light sources; receiving an image signal, the image signal includes a plurality of image frames; displaying the image frames on the display panel sequentially in the plurality of frame intervals, each of the frame intervals includes a vertical a masking interval and a data scanning interval; calculating a region dimming value corresponding to each of the display regions according to the image signal; providing a backlight pulse corresponding to each of the light sources; providing the backlight pulse in the vertical blanking interval; Adjusting the width and/or intensity of each backlight pulse corresponding to each of the display regions; wherein each of the backlight pulses has the same width, and adjusting the backlight according to the dimming value of the region corresponding to each display region The intensity of the pulse; or the intensity of each of the backlight pulses is the same, and according to the area corresponding to each display area The domain dimming value adjusts the width of each of the backlight pulses. 一種用於顯示裝置的背光控制方法，該顯示裝置包括一顯示面板以及一背光單元，該背光控制方法包括： 將該顯示面板劃分為複數個顯示區域，其中該背光單元包括複數個光源，該些顯示區域分別對應該些光源；接收一影像信號，該影像信號包括複數個影像訊框；依序於複數個訊框區間顯示該些影像訊框於該顯示面板，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；根據該影像信號計算各該顯示區域對應的一區域調光值；對應於各該光源分別提供一背光脈衝；於該垂直遮沒區間提供該背光脈衝；以及根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度；其中該背光脈衝的寬度與該垂直遮沒區間的寬度相同；或者，該背光脈衝的寬度小於該垂直遮沒區間的寬度。 A backlight control method for a display device, the display device includes a display panel and a backlight unit, and the backlight control method includes: Dividing the display panel into a plurality of display areas, wherein the backlight unit comprises a plurality of light sources, wherein the display areas respectively correspond to the light sources; receiving an image signal, the image signal comprising a plurality of image frames; The frame interval displays the image frames on the display panel, each frame interval includes a vertical blanking interval and a data scanning interval; and calculating a region dimming value corresponding to each display region according to the image signal; Each of the light sources respectively provides a backlight pulse; the backlight pulse is provided in the vertical blanking interval; and the width and/or intensity of each backlight pulse is adjusted according to the region dimming value corresponding to each display region; wherein the backlight pulse The width of the vertical blanking interval is the same; or the width of the backlight pulse is smaller than the width of the vertical blanking interval. 一種用於顯示裝置的背光控制方法，該顯示裝置包括一顯示面板以及一背光單元，該背光控制方法包括：將該顯示面板劃分為複數個顯示區域，其中該背光單元包括複數個光源，該些顯示區域分別對應該些光源；接收一影像信號，該影像信號包括複數個影像訊框；依序於複數個訊框區間顯示該些影像訊框於該顯示面板，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；根據該影像信號計算各該顯示區域對應的一區域調光值；對應於各該光源分別提供一背光脈衝； 於該垂直遮沒區間提供該背光脈衝；以及根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度；其中該背光脈衝的一起始時間及一結束時間的其中之一位於該垂直遮沒區間外；該背光脈衝的該起始時間及該結束時間均位於該垂直遮沒區間外。 A backlight control method for a display device, the display device includes a display panel and a backlight unit, the backlight control method includes: dividing the display panel into a plurality of display areas, wherein the backlight unit comprises a plurality of light sources, The display area respectively corresponds to the light sources; receiving an image signal, the image signal includes a plurality of image frames; displaying the image frames on the display panel sequentially in the plurality of frame intervals, each of the frame intervals includes a vertical a masking interval and a data scanning interval; calculating a region dimming value corresponding to each display region according to the image signal; respectively providing a backlight pulse corresponding to each of the light sources; Providing the backlight pulse in the vertical blanking interval; and adjusting the width and/or intensity of each backlight pulse according to the regional dimming value corresponding to each display region; wherein a start time and an end time of the backlight pulse One of the two is outside the vertical blanking interval; the start time and the end time of the backlight pulse are both outside the vertical blanking interval. 如申請專利範圍第8項至第10項中任一項所述之背光控制方法，其中將該顯示面板劃分為該些顯示區域的步驟包括：將該顯示面板垂直劃分為M個該些顯示區域，其中該些光源是設置於該顯示面板的頂側及底側的至少其中一側，M為大於1的正整數；或者，將該顯示面板水平劃分為N個該些顯示區域，其中該些光源是設置於該顯示面板的左側及右側的至少其中一側，N為大於1的正整數。 The backlight control method according to any one of claims 8 to 10, wherein the dividing the display panel into the display areas comprises vertically dividing the display panel into M display areas The light source is disposed on at least one of a top side and a bottom side of the display panel, and M is a positive integer greater than 1. Alternatively, the display panel is horizontally divided into N display areas, wherein the light source The light source is disposed on at least one of the left side and the right side of the display panel, and N is a positive integer greater than one. 如申請專利範圍第8項至第10項中任一項所述之背光控制方法，其中將該顯示面板劃分為該些顯示區域的步驟包括：將該顯示面板以M行N列劃分為(M×N)個該些顯示區域，該些顯示區域為矩形，其中該些光源設置於對應該些顯示區域的位置，M與N皆為大於1的正整數。 The backlight control method according to any one of claims 8 to 10, wherein the dividing the display panel into the display regions comprises: dividing the display panel into M rows and N columns (M ×N) the display areas, the display areas are rectangular, wherein the light sources are disposed at positions corresponding to the display areas, and both M and N are positive integers greater than one. 一種用於顯示裝置的背光控制方法，該顯示裝置包括一顯示面板以及一背光單元，該背光控制方法包括：將該顯示面板劃分為複數個顯示區域，其中該背光單元包括複數個光源，該些顯示區域分別對應該些光源；接收一影像信號，該影像信號包括複數個影像訊框；依序於複數個訊框區間顯示該些影像訊框於該顯示面板，各該訊框區間包括一垂直遮沒區間以及一資料掃描區間；根據該影像信號計算各該顯示區域對應的一區域調光值；對應於各該光源分別提供一背光脈衝；於該垂直遮沒區間提供該背光脈衝；以及根據各該顯示區域對應的該區域調光值，調整各該背光脈衝的寬度及/或強度；其中計算各該顯示區域對應的該區域調光值的步驟包括：計算該影像信號於各該顯示區域內複數個像素灰階值的一平均值，並根據該平均值計算該區域調光值；或者，計算該影像信號於各該顯示區域內複數個像素灰階值的該平均值、一最大值以及一最小值，並根據該平均值、該最大值、以及該最小值計算該區域調光值。 A backlight control method for a display device, the display device includes a display panel and a backlight unit, the backlight control method includes: dividing the display panel into a plurality of display areas, wherein the backlight unit comprises a plurality of light sources, The display area respectively corresponds to the light sources; receiving an image signal, the image signal includes a plurality of image frames; displaying the image frames on the display panel sequentially in the plurality of frame intervals, each of the frame intervals includes a vertical a masking interval and a data scanning interval; calculating a region dimming value corresponding to each of the display regions according to the image signal; providing a backlight pulse corresponding to each of the light sources; providing the backlight pulse in the vertical blanking interval; The dimming value of the area corresponding to the display area is adjusted to adjust the width and/or intensity of each of the backlight pulses; wherein the calculating the dimming value of the area corresponding to each of the display areas comprises: calculating the image signal in each display area An average value of the grayscale values of the plurality of pixels, and calculating the dimming value of the region according to the average value; or Calculating the average value, a maximum value, and a minimum value of the plurality of pixel grayscale values in the display area of the image signal, and calculating the regional dimming value according to the average value, the maximum value, and the minimum value.
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