TWI518667B - Dimming method and dimming device for backlight module - Google Patents

Dimming method and dimming device for backlight module Download PDF

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TWI518667B
TWI518667B TW102123697A TW102123697A TWI518667B TW I518667 B TWI518667 B TW I518667B TW 102123697 A TW102123697 A TW 102123697A TW 102123697 A TW102123697 A TW 102123697A TW I518667 B TWI518667 B TW I518667B
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light sources
backlight module
light
pixel
dimming
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TW201503092A (en
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陳星全
林文祈
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聯詠科技股份有限公司
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Description

背光模組的調光方法與調光裝置 Dimming method and dimming device of backlight module

本發明是有關於一種背光模組的調光技術，且特別是有關於一種顯示面板之背光模組的調光方法及調光裝置。 The present invention relates to a dimming technology for a backlight module, and more particularly to a dimming method and a dimming device for a backlight module of a display panel.

隨著科技蓬勃發展，攜帶型電子產品及平面顯示器產品也隨之興起。而在眾多平面顯示器的類型當中，液晶顯示器(Liquid Crystal Display,LCD)基於其低電壓操作、無輻射線散射、重量輕以及體積小等優點，隨即已成為各顯示器產品之主流。液晶顯示器主要是由背光模組以及顯示面板所組成，由於顯示面板本身不會發光，因此背光模組被用以提供液晶顯示器於顯示影像時所需的背光源。其中依照光源的入光方式，背光模組還可分為直下式背光模組和側光式背光模組兩種。 With the rapid development of technology, portable electronic products and flat panel display products have also emerged. Among the many types of flat panel displays, liquid crystal displays (LCDs) have become the mainstream of display products based on their low voltage operation, no radiation scattering, light weight and small size. The liquid crystal display is mainly composed of a backlight module and a display panel. Since the display panel itself does not emit light, the backlight module is used to provide a backlight required for the liquid crystal display to display images. According to the light input mode of the light source, the backlight module can be divided into a direct type backlight module and an edge light type backlight module.

此外，在液晶顯示器的顯示品質因為使用者的需求而不斷提升的同時，背光模組已不僅僅只是用來單純的提供光源。背光模組的亮度也因應不同的顯示條件以及電力的消耗來進行調 整，以使顯示裝置的效能可以有效的上升。圖1為習知的一種液晶顯示器的示意圖。在傳統的區域調光(local dimming)技術中，液晶顯示器的顯示面板可以各種形式被切割成多個區塊。如圖1所示，液晶顯示器10具有顯示面板110與背光模組111，且顯示面板110被切割成4個顯示區塊Zone_1~Zone_4。背光源111_1~111_4將以一對一方式各自對應至顯示區塊Zone_1~Zone_4，並依據各自對應的區塊的影像內容，進一步調整其提供背光的亮度。 In addition, while the display quality of the liquid crystal display is continuously improved due to the user's demand, the backlight module is not only used to simply provide the light source. The brightness of the backlight module is also adjusted according to different display conditions and power consumption. In order to make the performance of the display device rise effectively. 1 is a schematic view of a conventional liquid crystal display. In a conventional local dimming technique, a display panel of a liquid crystal display can be cut into a plurality of blocks in various forms. As shown in FIG. 1 , the liquid crystal display 10 has a display panel 110 and a backlight module 111 , and the display panel 110 is cut into four display blocks Zone_1~Zone_4. The backlights 111_1~111_4 will respectively correspond to the display blocks Zone_1~Zone_4 in a one-to-one manner, and further adjust the brightness of the backlight provided according to the image content of the corresponding blocks.

在圖1所示的範例中，區塊Zone_1對應到背光源111_1，依此類推，顯示區塊Zone_4對應到背光源111_4。於是，背光源111_1可根據相對應的顯示區塊Zone_1所需亮度來調整亮暗，依此類推，背光源111_4可根據相對應的顯示區塊Zone_4所需亮度來調整亮暗，以進一步的突顯畫面對比度(contrast ratio)。在傳統調光方法中，背光源111_1只會參考所屬顯示區塊Zone_1的畫素所需亮度來調整亮暗，而不會參考其他區塊的畫素。依此類推，背光源111_4只會參考所屬顯示區塊Zone_4的畫素所需亮度來調整亮暗，而不會參考其他區塊的畫素。然而，基於側光式背光源透過導光板而提供光源的原理，每個背光源除了提供光給各自所屬區塊的畫素外，所提供的光還可能會影響非所屬顯示區塊的畫素。提供的光可在顯示面板上擴散成不同的光照區域。也就是說，每一個顯示區塊的亮度可能是由多組側光式背光源所提供。基此，對於傳統的區域調光方法而言，分區計算的方式會無法兼顧 其他空間上比較遠的光源貢獻量，因此容易發生部份顯示區塊亮度不足或液晶顯示器之顯示品質不佳的問題。 In the example shown in FIG. 1, the block Zone_1 corresponds to the backlight 111_1, and so on, the display block Zone_4 corresponds to the backlight 111_4. Therefore, the backlight 111_1 can adjust the brightness and darkness according to the brightness required by the corresponding display block Zone_1, and so on, the backlight 111_4 can adjust the brightness and darkness according to the required brightness of the corresponding display block Zone_4, so as to further highlight Contrast ratio. In the conventional dimming method, the backlight 111_1 adjusts the brightness and darkness only with reference to the required brightness of the pixels of the associated display block Zone_1, without referring to the pixels of other blocks. By analogy, the backlight 111_4 will only adjust the brightness and darkness with reference to the desired brightness of the pixels of the associated display block Zone_4, without referring to the pixels of other blocks. However, based on the principle that the edge-lit backlight provides a light source through the light guide plate, in addition to providing the light to the pixels of the respective block, each provided backlight may also affect the pixels of the non-affiliated display block. . The provided light can be diffused into different illumination areas on the display panel. That is, the brightness of each display block may be provided by multiple sets of edge-lit backlights. Therefore, for the traditional regional dimming method, the method of partition calculation cannot be balanced. In other spatially distant sources, the amount of light source contribution is large, so that the brightness of some display blocks is insufficient or the display quality of the liquid crystal display is poor.

有鑑於此，本發明提出一種背光模組的調光方法與調光裝置，藉由多個光源對顯示面板的光量分佈資訊來決定光源各自所需強度，進而提昇液晶顯示器的顯示品質。 In view of the above, the present invention provides a dimming method and a dimming device for a backlight module. The light source distribution information of the display panel is used to determine the required intensity of the light source, thereby improving the display quality of the liquid crystal display.

本發明所提供的一種背光模組的調光方法，此調光方法包括下列步驟。提供背光模組的多個光源各自對顯示面板的光量分佈資訊。根據光源中的這些光量分佈資訊，於顯示面板之多個不同位置處，分別獲得光源之多個光量貢獻比例。依據從不同位置處所獲得之光量貢獻比例，決定光源各自的所需強度。 A dimming method for a backlight module provided by the present invention, the dimming method comprising the following steps. Providing information about the light amount distribution of each of the plurality of light sources of the backlight module to the display panel. According to the light quantity distribution information in the light source, a plurality of light quantity contribution ratios of the light source are respectively obtained at a plurality of different positions of the display panel. The required intensity of each of the light sources is determined based on the proportion of the amount of light obtained from different locations.

在本發明的一實施例中，上述的背光模組的調光方法，其中光源當中每一者之光量分佈資訊包括：光源於顯示面板之多個畫素當中每一畫素處所貢獻之亮度值。 In an embodiment of the present invention, in the dimming method of the backlight module, the light quantity distribution information of each of the light sources includes: a brightness value contributed by each of the plurality of pixels of the display panel .

在本發明的一實施例中，上述的背光模組的調光方法，其中於顯示面板之不同位置處係包括顯示面板之多個畫素當中之每一畫素。 In an embodiment of the present invention, the dimming method of the backlight module includes: each of the plurality of pixels of the display panel at different positions of the display panel.

在本發明的一實施例中，上述的背光模組的調光方法，其中所分別獲得光源之光量貢獻比例之步驟係包括：對於各畫素，分別獲得光源中與畫素對應之至少二個擇定光源之光量貢獻比例。 In an embodiment of the present invention, the step of dimming the backlight module, wherein the step of obtaining the light quantity contribution ratio of the light source respectively comprises: obtaining, for each pixel, at least two corresponding to the pixels in the light source. Select the proportion of the light source contribution of the light source.

在本發明的一實施例中，上述的背光模組的調光方法，其中與畫素對應之至少二個擇定光源係包括光源當中之全部光源。 In an embodiment of the present invention, in the dimming method of the backlight module, at least two selected light sources corresponding to the pixels include all of the light sources.

在本發明的一實施例中，上述的背光模組的調光方法，其中與畫素對應之至少二個擇定光源係包括光源當中與畫素最相鄰之至少兩個光源。 In an embodiment of the present invention, the dimming method of the backlight module, wherein the at least two selected light sources corresponding to the pixels comprise at least two light sources that are most adjacent to the pixels among the light sources.

在本發明的一實施例中，上述的背光模組的調光方法，其中顯示面板係劃分為複數區域，分別對應光源，以及與畫素對應之至少二個擇定光源係包括畫素所位於區域之對應光源，以及畫素所位於區域之至少一相鄰區域之至少一對應光源。 In an embodiment of the present invention, in the dimming method of the backlight module, the display panel is divided into a plurality of regions, respectively corresponding to the light source, and at least two selected light sources corresponding to the pixels include a pixel. a corresponding light source of the region, and at least one corresponding light source of at least one adjacent region of the region in which the pixel is located.

在本發明的一實施例中，上述的背光模組的調光方法，其中根據光源中的光量分佈資訊，於顯示面板之多個不同位置處，分別獲得光源之光量貢獻比例之步驟係包括分別於顯示面板之不同位置當中每一者，進行下述步驟：根據光源中的光量分佈資訊，分別獲得光源之多個亮度值；根據於位置處所獲得之光源之亮度值，獲得位置處之總亮度值；以及藉由計算光源於位置處之亮度值分別與總亮度值之比值作為光源於位置處之個別光量貢獻比例值，獲得光源於位置處之光量貢獻比例。 In an embodiment of the present invention, in the dimming method of the backlight module, the step of obtaining the light quantity contribution ratio of the light source at a plurality of different positions of the display panel according to the light quantity distribution information in the light source includes respectively For each of the different positions of the display panel, the following steps are performed: obtaining a plurality of brightness values of the light source according to the light quantity distribution information in the light source; obtaining the total brightness at the position according to the brightness value of the light source obtained at the position And obtaining a ratio of the light quantity contribution of the light source at the position by calculating a ratio of the brightness value of the light source at the position to the total brightness value as the individual light quantity contribution ratio value of the light source at the position.

在本發明的一實施例中，上述的背光模組的調光方法，其中依據針對顯示面板之畫素所獲得之光量貢獻比例，決定光源的強度之步驟包括：(i)針對顯示面板之不同位置當中之每一位置，在符合位置之目標亮度值之條件下，根據於位置處所獲得之 光量貢獻比例，獲得至少兩個擇定光源分別之可能所需強度。(ii)針對光源當中每一者，依據光源分別針對不同位置所獲得之可能所需強度，決定光源的所需強度。 In an embodiment of the present invention, in the dimming method of the backlight module, the step of determining the intensity of the light source according to the proportion of the amount of light obtained for the pixels of the display panel includes: (i) different for the display panel Each position in the position is obtained according to the location under the condition that the target brightness value of the position is met. The amount of light contribution is obtained by obtaining the possible required intensity of at least two selected light sources. (ii) For each of the light sources, the required intensity of the light source is determined based on the possible required intensity obtained by the light source for different locations.

在本發明的一實施例中，上述的背光模組的調光方法，更包括：針對畫素當中每一畫素，將畫素的畫素資料轉換為畫素之目標亮度值。 In an embodiment of the present invention, the dimming method of the backlight module further includes: converting pixel parameters of the pixel to a target luminance value of the pixel for each pixel in the pixel.

在本發明的一實施例中，上述的背光模組的調光方法，其中將畫素的畫素資料轉換目標亮度值之步驟係藉由使用一GAMMA曲線來實施。 In an embodiment of the present invention, the dimming method of the backlight module, wherein the step of converting the pixel data of the pixel into the target luminance value is performed by using a GAMMA curve.

在本發明的一實施例中，上述的背光模組的調光方法，其中將畫素的畫素資料轉換目標亮度值之步驟包括：計算k=DP/DM，其中k為畫素的目標亮度值，DP為畫素的畫素資料，而DM為畫素資料的值域的最大值。 In an embodiment of the present invention, the dimming method of the backlight module, wherein the step of converting the pixel data of the pixel into the target brightness value comprises: calculating k=DP/DM, where k is the target brightness of the pixel Value, DP is the pixel data of the pixel, and DM is the maximum value of the range of the pixel data.

在本發明的一實施例中，上述的背光模組的調光方法，其中根據於位置處所獲得之光量貢獻比例，獲得至少兩個擇定光源分別之可能所需強度之步驟係包括：藉由至少兩個擇定光源於該位置處之可能所需亮度與個別光量貢獻比例值之對應乘積值之總和值，安排為等於目標亮度值，以計算出至少兩個擇定光源於位置處之可能所需亮度。 In an embodiment of the present invention, in the dimming method of the backlight module, the step of obtaining the possible required intensity of the at least two selected light sources according to the light amount contribution ratio obtained at the position includes: And a sum of the product values of the at least two selected light sources at the position and the respective light quantity contribution ratio values, arranged to be equal to the target brightness value, to calculate the possible position of the at least two selected light sources The required brightness.

在本發明的一實施例中，上述的背光模組的調光方法，其中步驟(i)更包括：針對顯示面板之不同位置當中之每一位置，將至少兩個擇定光源之可能所需強度安排為相等。 In an embodiment of the present invention, the dimming method of the backlight module, wherein the step (i) further comprises: at least two selected light sources may be required for each of different positions of the display panel The intensity is arranged to be equal.

在本發明的一實施例中，上述的背光模組的調光方法，其中步驟(i)更包括：針對顯示面板之不同位置當中之每一位置，將至少兩個擇定光源當中亮度貢獻比例值小於門檻值之擇定光源之可能所需強度安排為零，以及將至少兩個擇定光源當中之其他擇定光源之可能所需強度安排為相等。 In an embodiment of the present invention, in the dimming method of the backlight module, the step (i) further includes: ratio of brightness contribution among at least two selected light sources for each of different positions of the display panel The required intensity of the selected source having a value less than the threshold value is arranged to be zero, and the possible required intensities of the other selected ones of the at least two selected sources are arranged to be equal.

在本發明的一實施例中，上述的背光模組的調光方法，其中步驟(i)更包括：針對顯示面板之不同位置當中之每一位置，根據至少兩個擇定光源之亮度貢獻比例，決定至少兩個擇定光源之可能所需強度之比例。 In an embodiment of the present invention, in the dimming method of the backlight module, the step (i) further includes: according to each of the different positions of the display panel, according to the brightness contribution ratio of the at least two selected light sources , determining the ratio of the possible required strength of at least two selected sources.

在本發明的一實施例中，上述的背光模組的調光方法，其中根據至少兩個擇定光源之亮度貢獻比例，決定至少兩個擇定光源之可能所需強度之比例之步驟係包括：將至少兩個擇定光源之可能所需強度之比例決定為等於至少兩個擇定光源之亮度貢獻比例。 In an embodiment of the present invention, in the dimming method of the backlight module, the step of determining a ratio of possible required intensities of the at least two selected light sources according to a brightness contribution ratio of the at least two selected light sources includes : determining a ratio of possible required intensities of at least two selected light sources to be equal to a brightness contribution ratio of at least two selected light sources.

在本發明的一實施例中，上述的背光模組的調光方法，其中步驟(ii)所述決定光源的亮度係包括：針對光源當中每一者，找出光源分別針對不同位置所獲得之可能所需強度當中之最大者，作為光源的所需強度。 In an embodiment of the present invention, the dimming method of the backlight module, wherein the determining the brightness of the light source in the step (ii) comprises: finding, for each of the light sources, obtaining the light source respectively for different positions. The largest of the required strengths, as the required intensity of the light source.

本發明的提供一種背光模組的調光方法，此調光方法包括下列步驟。提供背光模組的多個光源各自對顯示面板的光量分佈資訊。於顯示面板之多個畫素當中之每一畫素處，分別根據光源中與畫素對應之至少二個擇定光源的光量分佈資訊，獲得至少 兩個擇定光源對於畫素之光量貢獻比例。針對顯示面板之不同位置當中之每一位置，在符合位置之目標亮度值之條件下，根據於位置處所獲得之光量貢獻比例，獲得至少兩個擇定光源分別之可能所需強度。針對光源當中每一者，依據光源分別針對不同位置所獲得之可能所需強度，決定光源的所需強度。 The invention provides a dimming method for a backlight module, and the dimming method comprises the following steps. Providing information about the light amount distribution of each of the plurality of light sources of the backlight module to the display panel. Obtaining at least each of the plurality of pixels of the display panel according to the light quantity distribution information of the at least two selected light sources corresponding to the pixels in the light source The two selected light sources contribute a proportion to the amount of light of the pixels. For each of the different positions of the display panel, the possible required intensity of the at least two selected light sources is obtained according to the proportion of the light amount obtained at the position under the condition that the target brightness value of the position is met. For each of the light sources, the required intensity of the light source is determined based on the possible required intensity obtained by the light source for different locations.

從另一觀點來看，本發明提供一種背光模組的調光裝置，此調光裝置包括資料庫以及調光電路。資料庫提供背光模組的多個光源各自對顯示面板的光量分佈資訊。調光電路耦接至資料庫，調光電路根據光源中的光量分佈資訊，於顯示面板之多個不同位置處，分別獲得光源之多個光量貢獻比例。依據從不同位置處所獲得之光量貢獻比例，決定光源各自的所需強度。 From another point of view, the present invention provides a dimming device for a backlight module, the dimming device comprising a data library and a dimming circuit. The database provides information on the light amount distribution of each of the plurality of light sources of the backlight module to the display panel. The dimming circuit is coupled to the data base, and the dimming circuit obtains a plurality of light quantity contribution ratios of the light source at a plurality of different positions of the display panel according to the light quantity distribution information in the light source. The required intensity of each of the light sources is determined based on the proportion of the amount of light obtained from different locations.

從另一觀點來看，本發明提供一種背光模組的調光裝置，此調光裝置包括資料庫以及調光電路。資料庫提供背光模組的多個光源各自對顯示面板的光量分佈資訊。調光電路耦接至資料庫，調光電路於顯示面板之多個畫素當中之每一畫素處，分別根據光源中與畫素對應之至少二個擇定光源的光量分佈資訊，獲得至少兩個擇定光源對於畫素之光量貢獻比例。調光電路針對顯示面板之不同位置當中之每一位置，在符合位置之目標亮度值之條件下，根據於位置處所獲得之光量貢獻比例，獲得至少兩個擇定光源分別之可能所需強度。調光電路針對光源當中每一者，依據光源分別針對不同位置所獲得之可能所需強度，決定光源的所需強度。 From another point of view, the present invention provides a dimming device for a backlight module, the dimming device comprising a data library and a dimming circuit. The database provides information on the light amount distribution of each of the plurality of light sources of the backlight module to the display panel. The dimming circuit is coupled to the data library, and the dimming circuit obtains at least each of the plurality of pixels of the display panel according to the light quantity distribution information of the at least two selected light sources corresponding to the pixels in the light source. The two selected light sources contribute a proportion to the amount of light of the pixels. The dimming circuit obtains, respectively, the possible required intensity of the at least two selected light sources according to the proportion of the light amount obtained at the position for each position of the different positions of the display panel under the condition of the target brightness value of the position. The dimming circuit determines the required intensity of the light source for each of the light sources according to the possible required intensity obtained by the light source for different positions.

基於上述，本發明之背光模組的調光方法，根據光源的光量分佈資訊，分別於顯示面板之多個不同位置處獲得各光源的光量貢獻比例，並依據各光源於這些的不同位置處的光量貢獻比例來決定光源各自所需強度。如此一來，可藉由直接考慮背光源在顯示面板的光量分佈情況，來決定各個背光源所需要發出的亮度。使背光源的調光方法不再受限於分區的方式，而是直接以實際背光分佈情況去驅動背光源，因此確保顯示面板的所有顯示區域都有足夠的背光亮度。 Based on the above, the dimming method of the backlight module of the present invention obtains the light quantity contribution ratio of each light source at a plurality of different positions of the display panel according to the light quantity distribution information of the light source, and according to the different positions of the light sources at the different positions. The amount of light contribution contributes to the respective required intensity of the light source. In this way, the brightness of each backlight can be determined by directly considering the distribution of the light amount of the backlight on the display panel. The dimming method of the backlight is no longer limited to the way of partitioning, but the backlight is directly driven by the actual backlight distribution, thus ensuring sufficient backlight brightness for all display areas of the display panel.

為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。 The above described features and advantages of the invention will be apparent from the following description.

10、20‧‧‧液晶顯示器 10, 20‧‧‧ LCD monitor

110、210‧‧‧顯示面板 110, 210‧‧‧ display panel

111、240‧‧‧背光模組 111, 240‧‧‧ backlight module

111_1~111_4‧‧‧背光源 111_1~111_4‧‧‧Backlight

220‧‧‧顯示模組 220‧‧‧ display module

230‧‧‧調光裝置 230‧‧‧ dimming device

231‧‧‧資料庫 231‧‧‧Database

232‧‧‧調光電路 232‧‧‧ dimming circuit

Zone_1~Zone_4‧‧‧顯示區塊 Zone_1~Zone_4‧‧‧Display block

P11、P12、P1n、P21、P22、P2n、Pm1、Pm2、Pmn‧‧‧畫素 P 11, P 12, P 1n , P 21, P 22, P 2n, P m1, P m2, P mn ‧‧‧ pixels

BL_1、BL_2、BL_3、BL_s‧‧‧背光源 BL_1, BL_2, BL_3, BL_s‧‧‧ backlight

S310~S350‧‧‧本發明一實施例之背光模組的調光方法的步驟 S310~S350‧‧‧ steps of dimming method of backlight module according to an embodiment of the invention

S510~S550‧‧‧本發明一實施例之背光模組的調光方法的步驟 S510~S550‧‧‧ steps of dimming method of backlight module according to an embodiment of the invention

圖1是習知的一種液晶顯示器的示意圖。 1 is a schematic view of a conventional liquid crystal display.

圖2為根據本發明一實施例所繪示的液晶顯示器的系統方塊圖。 2 is a system block diagram of a liquid crystal display according to an embodiment of the invention.

圖3為根據本發明一實施例所繪示的背光模組的調光方法的流程圖。 FIG. 3 is a flow chart of a dimming method of a backlight module according to an embodiment of the invention.

圖4A與圖4B繪示為光亮分佈圖的示意圖。 4A and 4B are schematic diagrams showing a light distribution map.

圖5為根據一實施例所繪示的圖3中步驟S350的詳細流程圖。 FIG. 5 is a detailed flowchart of step S350 of FIG. 3 according to an embodiment.

在本案說明書全文(包括申請專利範圍)中所使用的「耦接」一詞可指任何直接或間接的連接手段。舉例而言，若文中描述第一裝置耦接於第二裝置，則應該被解釋成該第一裝置可以直接連接於該第二裝置，或者該第一裝置可以透過其他裝置或某種連接手段而間接地連接至該第二裝置。另外，凡可能之處，在圖式及實施方式中使用相同標號的元件/構件/步驟代表相同或類似部分。不同實施例中使用相同標號或使用相同用語的元件/構件/步驟可以相互參照相關說明。 The term "coupled" as used throughout the specification (including the scope of the patent application) may be used in any direct or indirect connection. For example, if the first device is described as being coupled to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be connected through other devices or some kind of connection means. Connected to the second device indirectly. In addition, wherever possible, the elements and/ Elements/components/steps that use the same reference numbers or use the same terms in different embodiments may refer to the related description.

圖2繪示為本發明一示範性實施例之液晶顯示器(liquid crystal display,LCD)20的系統方塊圖。請參照圖2，液晶顯示器20包括顯示面板(LCD panel)210、顯示模組220、調光裝置230，以及用以提供顯示面板210所需之背光源的背光模組(backlight module)240。在一些實施例中，顯示模組220包括縮放控制器(Scalar)、時序控制器(timing controller)、源極驅動器(source drier)及/或閘極驅動器(gate driver)等，顯示模組220依據影像的畫素資料來驅動液晶顯示面板210。 2 is a system block diagram of a liquid crystal display (LCD) 20 according to an exemplary embodiment of the invention. Referring to FIG. 2 , the liquid crystal display 20 includes a display panel (LCD panel) 210 , a display module 220 , a dimming device 230 , and a backlight module 240 for providing a backlight required for the display panel 210 . In some embodiments, the display module 220 includes a scaling controller (Scalar), a timing controller, a source drier, and/or a gate driver. The display module 220 is The pixel data of the image drives the liquid crystal display panel 210.

於本示範性實施例中，顯示面板210具有多個以陣列方式(m*n)排列的畫素P11至Pmn，搭配背光模組240所提供的光源來達到顯示影像畫面的效果，而背光模組240具有s個背光源BL_1~BL_s，其中上述的m、n及s為正整數。一般來說，m*n亦可表示為液晶顯示器100的顯示解析度(resolution)，例如為 1024*768，但並不限制於此。調光裝置230中包含資料庫231及調光電路232，且資料庫231耦接於調光電路232。資料庫231是一種具有儲存功能的元件，用以提供背光模組240的多個光源BL_1~BL_s各自對顯示面板210的光量分佈資訊。調光電路232是一種具有運算功能的積體電路，用以根據光量分佈資訊來調整背光源BL_1~BL_s的亮度。進一步來說，調光電路232可依據背光源BL_1~BL_s各自在畫面上的多個不同位置之光量貢獻比例，而調整背光源BL_1~BL_s所提供的亮度，以讓畫面上各點都具有足夠的背光亮度。 In the present exemplary embodiment, the display panel 210 has a plurality of pixels P 11 to P mn arranged in an array (m*n), and the light source provided by the backlight module 240 is used to achieve the effect of displaying an image. The backlight module 240 has s backlights BL_1 BLBL_s, wherein the above m, n and s are positive integers. In general, m*n can also be expressed as a display resolution of the liquid crystal display 100, for example, 1024*768, but is not limited thereto. The dimming device 230 includes a database 231 and a dimming circuit 232, and the database 231 is coupled to the dimming circuit 232. The data library 231 is a component having a storage function for providing light distribution information of the plurality of light sources BL_1 BL BL_s of the backlight module 240 to the display panel 210. The dimming circuit 232 is an integrated circuit having an arithmetic function for adjusting the brightness of the backlights BL_1 to BL_s according to the light amount distribution information. Further, the dimming circuit 232 can adjust the brightness provided by the backlights BL_1~BL_s according to the light source contribution ratio of the backlights BL_1~BL_s at a plurality of different positions on the screen, so that the points on the screen are sufficient. Backlight brightness.

為了進一步說明本發明，圖3為根據一實施例所繪示的背光模組的調光方法的流程圖。請同時參照圖2及圖3，本實施例的方法適用於上述的液晶顯示器20，以下即搭配液晶顯示器20中的各項元件說明本實施例之調光方法的詳細步驟。 To further illustrate the present invention, FIG. 3 is a flow chart of a dimming method of a backlight module according to an embodiment. Referring to FIG. 2 and FIG. 3 simultaneously, the method of the present embodiment is applied to the liquid crystal display 20 described above, and the detailed steps of the dimming method of the present embodiment will be described below with reference to various elements in the liquid crystal display 20.

首先，在步驟S310中，資料庫231提供背光模組240的多個背光源BL_1~BL_s各自對顯示面板210的光量分佈資訊。其中，光量分佈資訊可以是透過各背光源BL_1~BL_s的光亮分佈圖(light profile)而取的資訊。詳細來說，光亮分佈圖是背光源BL_1~BL_s各自在顯示面板210上光形(光場分佈)的資料。一般透過點亮單一背光源並對顯示面板210上不同位置進行亮度偵測/取樣來得到所述單一背光源的光亮分佈圖。圖4A與圖4B分別為光亮分佈圖的示意圖。當只有點亮背光源BL_1時，背光源BL_1於顯示面板210上所提供的光亮區域如圖4A所示。當只有 點亮背光源BL_s時，背光源BL_s於顯示面板210上所提供的光亮區域如圖4B所示。也就是說，每一個背光源會有自己的相對應的光亮分佈圖。因此，資料庫231可以記錄背光模組240中背光源BL_1~BL_s各自光亮分佈圖的光量分佈資訊。 First, in step S310, the database 231 provides the light quantity distribution information of each of the plurality of backlights BL_1 BL BL_s of the backlight module 240 on the display panel 210. The light quantity distribution information may be information obtained by a light profile of each of the backlights BL_1 BL BL_s. In detail, the light distribution map is information on the light shape (light field distribution) of each of the backlights BL_1 to BL_s on the display panel 210. The brightness profile of the single backlight is typically obtained by illuminating a single backlight and performing brightness detection/sampling at different locations on the display panel 210. 4A and 4B are schematic views respectively showing a light distribution map. When only the backlight BL_1 is lit, the bright area provided by the backlight BL_1 on the display panel 210 is as shown in FIG. 4A. When only When the backlight BL_s is lit, the bright area provided by the backlight BL_s on the display panel 210 is as shown in FIG. 4B. In other words, each backlight has its own corresponding light distribution map. Therefore, the database 231 can record the light quantity distribution information of the respective light distribution maps of the backlights BL_1 BLBL_s in the backlight module 240.

在本實施例中，基於各光源的光亮分佈圖，光源BL_1~BL_s當中每一者之光量分佈資訊可以是光源BL_1~BL_s於顯示面板210之多個畫素當中每一畫素處所貢獻之亮度值。例如，光源BL_1之光量分佈資訊包括：光源BL_1對於顯示面板210之多個畫素當中每一畫素處所貢獻之亮度值。簡單來說，在分別點亮每一個背光源時，個別紀錄點亮每一光源時所有畫素P11~Pmn的亮度值，可獲得多個光源BL_1~BL_s各自對所有畫素P11至Pmn的亮度值，並將這些亮度值作為光量分佈資訊儲存在資料庫231中。值得一提的是，在其他實施例中關於光亮分佈圖的取得的步驟，可根據實際應用情況而決定是否透過子取樣(sub-sampling)來降低資料量，即光源BL_1~BL_s當中每一者之光量分佈資訊也可以是光源BL_1~BL_s於顯示面板210之部份畫素處所貢獻之亮度值，本發明對此不限制。 In this embodiment, based on the light distribution map of each light source, the light quantity distribution information of each of the light sources BL_1~BL_s may be the brightness contributed by each of the plurality of pixels of the display panel 210 of the light source BL_1~BL_s. value. For example, the light quantity distribution information of the light source BL_1 includes a brightness value contributed by the light source BL_1 to each pixel of the plurality of pixels of the display panel 210. In brief, when each backlight is separately illuminated, the brightness values of all the pixels P 11 ~P mn at each light source are individually recorded, and a plurality of light sources BL_1~BL_s can be obtained for all the pixels P 11 to The luminance values of P mn are stored in the database 231 as the light amount distribution information. It is worth mentioning that, in other embodiments, regarding the step of obtaining the light distribution map, whether the sub-sampling is used to reduce the data amount, that is, each of the light sources BL_1~BL_s, may be determined according to actual application conditions. The light quantity distribution information may also be the brightness value contributed by the light source BL_1~BL_s to a part of the pixels of the display panel 210, which is not limited by the present invention.

接著，在步驟S330中，調光電路232根據資料庫231所記錄關於光源BL_1~BL_s各自的這些光量分佈資訊，於顯示面板210之多個不同位置處，分別獲得光源BL_1~BL_s之多個光量貢獻比例。在本實施例中，所述於顯示面板210之不同位置處可以是顯示面板210之多個畫素P11~Pmn當中之每一畫素。在其 他實施例中，為了降低資料量，所述顯示面板210之不同位置處也可以是顯示面板210之部份特定畫素，例如是以特定間隔而取樣出來的畫素。也就是說，調光電路232可以透過資料庫231所記錄的光量分佈資訊獲得每一畫素P11~Pmn的光量貢獻比例，也可以透過光量分佈資訊獲得部份畫素的光量貢獻比例，本發明對此不限制。 Next, in step S330, the dimming circuit 232 obtains a plurality of light quantities of the light sources BL_1 BLBL_s at a plurality of different positions of the display panel 210 according to the light quantity distribution information recorded by the data library 231 for each of the light sources BL_1 BL BL_s. Contribution ratio. In this embodiment, the different positions of the display panel 210 may be each of the plurality of pixels P 11 -P mn of the display panel 210. In other embodiments, in order to reduce the amount of data, the display panel 210 may also be a part of a specific pixel of the display panel 210, for example, a pixel sampled at a specific interval. In other words, the dimming circuit 232 can obtain the light quantity contribution ratio of each pixel P 11 ~P mn through the light quantity distribution information recorded by the data library 231, and can also obtain the light quantity contribution ratio of the partial pixels through the light quantity distribution information. The invention is not limited thereto.

需要特別說明的是，上述調光電路232分別獲得光源BL_1~BL_s之光量貢獻比例之步驟中，調光電路232可藉由光量分佈資訊對於各畫素，分別獲得光源BL_1~BL_s中與畫素對應之至少二個擇定光源之光量貢獻比例。也就是說，對於顯示面板210之不同位置處或各畫素處，調光電路232需要依據至少兩個擇定光源的光量分佈資訊，來獲得所述至少兩個擇定光源對於一位置上或一畫素上的光源貢獻比例。其中，在一些實施例中，所述畫素對應之至少二個擇定光源係包括光源BL_1~BL_s當中之全部光源。 It should be noted that, in the step that the dimming circuit 232 obtains the light quantity contribution ratio of the light sources BL_1 BLBL_s respectively, the dimming circuit 232 can obtain the pixels in the light sources BL_1 BLBL_s by using the light quantity distribution information for each pixel. Corresponding to the proportion of the amount of light of at least two selected light sources. That is, for different positions or pixels of the display panel 210, the dimming circuit 232 needs to obtain the at least two selected light sources for a position or according to the light quantity distribution information of the at least two selected light sources. The proportion of the light source contribution on a pixel. In some embodiments, the at least two selected light sources corresponding to the pixels comprise all of the light sources BL_1 BLBL_s.

然而，本發明並不限定於利用所有光源BL_1~BL_s來獲得光源BL_1~BL_s之光量貢獻比例。在另一種實施方式中，畫素對應之至少二個擇定光源係包括光源BL_1~BL_s當中與畫素最相鄰之至少兩個光源。也就是說，對顯示面板210中任一被選定的畫素而言，可將與被選定的畫素距離最接近的多個光源作為擇定光源。具體來說，基於這些各畫素與光源之間空間距離，最靠近被選定畫素的光源即為其中一個擇定光源，除此之外，第二靠近被選定畫素的光 源即為另一個擇定光源，依此類推。如圖2所示，在一些實施例中，對於畫素P11而言，所述至少兩擇定光源可以是距離最接近的背光源BL_1與背光源BL_2。在另一些實施例中，所述至少兩擇定光源也可以是距離最接近的背光源BL_1、背光源BL_2與背光源BL_3。 However, the present invention is not limited to the use of all of the light sources BL_1 to BL_s to obtain the light amount contribution ratio of the light sources BL_1 to BL_s. In another embodiment, the at least two selected light sources corresponding to the pixels include at least two light sources that are most adjacent to the pixels among the light sources BL_1 BLBL_s. That is to say, for any selected pixel in the display panel 210, a plurality of light sources closest to the selected pixel distance can be used as the selected light source. Specifically, based on the spatial distance between the respective pixels and the light source, the light source closest to the selected pixel is one of the selected light sources, and in addition, the second light near the selected pixel The source is another source of choice, and so on. As shown in FIG. 2, in some embodiments, for the pixel P11, the at least two selected light sources may be the backlight BL_1 and the backlight BL_2 that are closest to each other. In other embodiments, the at least two selected light sources may also be the backlight source BL_1, the backlight BL_2, and the backlight BL_3 that are closest to each other.

另外，除了藉由全部的光源的光量分佈資訊來獲得光量貢獻比例，以及利用與畫素最相鄰之至少兩個光源的光量分佈資訊來獲得光量貢獻比例之外，在本發明的另一實施例中，還可以透過將顯示面板210分區的方式來擇定至少兩光源，以利用擇定的至少兩光源的光量分佈資訊來獲得光量貢獻比例。詳細來說，顯示面板210可劃分為複數區域，並分別對應不同光源。與畫素對應之至少二個擇定光源係包括畫素所位於區域之對應光源，以及畫素所位於區域之至少一相鄰區域之至少一對應光源。綜上所述，調光電路232可以基於不同的選擇機制，來從所有光源BL_1~BL_s中擇定至少兩個光源，並依據擇定光源的光量分佈資訊來獲得各畫素或一位置上的光量貢獻比例。 Further, in addition to obtaining the light amount contribution ratio by the light amount distribution information of all the light sources, and obtaining the light amount contribution ratio by using the light amount distribution information of at least two light sources adjacent to the pixel, another implementation of the present invention In an example, at least two light sources may be selected by partitioning the display panel 210 to obtain a light amount contribution ratio by using the selected light quantity distribution information of at least two light sources. In detail, the display panel 210 can be divided into a plurality of regions and respectively correspond to different light sources. The at least two selected light sources corresponding to the pixels include a corresponding light source in a region where the pixels are located, and at least one corresponding light source in at least one adjacent region of the region in which the pixels are located. In summary, the dimming circuit 232 can select at least two light sources from all the light sources BL_1 BLBL_s based on different selection mechanisms, and obtain each pixel or a position according to the light quantity distribution information of the selected light source. The proportion of light contribution.

再者，在本實施例中，取得光量貢獻比例的步驟S330可以進一步分為子步驟S331~S333實施之。調光電路232分別於顯示面板210之不同位置當中每一者，進行步驟S331~S333。例如，以顯示面板210之畫素P11為例，在步驟S331中，調光電路232根據光源BL_1~BL_s中各自的光量分佈資訊，分別獲得光源BL_1~BL_s於顯示面板210之畫素P11處之多個亮度值。在步驟S333中，調光電路232根據於畫素P11處所獲得之光源之亮度值， 獲得畫素P11處之總亮度值。基於前述可知，在調光電路232取得每一光源BL_1~BL_s的光亮分佈圖後，畫面上每一點的背光都來自於所有光源BL_1~BL_s的貢獻總和。 Furthermore, in the present embodiment, the step S330 of obtaining the light amount contribution ratio can be further divided into sub-steps S331 to S333. The dimming circuit 232 performs steps S331 to S333 at each of different positions of the display panel 210. For example, the display panel 210 of the pixel P 11, for example, in step S331, the dimmer circuit 232 of each of the light amount distribution information BL_1 ~ BL_s light source, the light source respectively BL_1 ~ BL_s pixels 210 of the display panel P 11 Multiple brightness values. In step S333, the dimmer circuit 232 according to the pixel P 11 in place of the obtained luminance value of the light source, obtain a total luminance value at the pixel P 11. Based on the above, after the dimming circuit 232 obtains the light distribution map of each of the light sources BL_1 BLBL_s, the backlight of each point on the screen comes from the sum of the contributions of all the light sources BL_1 BLBL_s.

基此，在步驟S335中，調光電路232藉由計算光源BL_1~BL_s於畫素P11處之亮度值分別與於畫素P11處之總亮度值之比值作為光源BL_1~BL_s於畫素P11處之個別光量貢獻比例值，獲得光源BL_1~BL_s於畫素P11處之光量貢獻比例。也就是說，個別光量貢獻比例值是每一光源所佔總亮度值的比例。舉例來說，假設液晶顯示器具有4個光源BL_1~BL_4。另外，在顯示面板210的畫素P11上，假設光源BL_1所貢獻之亮度值是512，光源BL_2所貢獻之亮度值是384，光源BL_3所貢獻之亮度值是96，光源BL_4所貢獻之亮度值是31，則總亮度值等於512+354+96+31=1023。再者，對於背光源BL_1~BL_4來說，在顯示面板210的畫素P11上各自的個別光量貢獻比例值就是512/1023，384/1023，96/1023，31/1023，而光源BL_1~BL_4於畫素P11處之光量貢獻比例為512/1023：384/1023：96/1023：31/1023。然，上述舉例說明僅為示範性實施方式，並非用以限定本發明。 By virtue of this, in step S335, the light control circuit 232 is calculated by a light source BL_1 ~ BL_s to the luminance value at the pixel P 11, respectively, the ratio of the total of the luminance values of the pixels P 11 as a light source to a pixel BL_1 ~ BL_s the amount of the individual light contribution ratio P 11 value, the light source is obtained BL_1 ~ BL_s contribution proportional to the light amount of the 11 pixels P. That is to say, the individual light amount contribution ratio value is the ratio of the total brightness value of each light source. For example, assume that the liquid crystal display has four light sources BL_1~BL_4. Further, in the display panel 210 on the pixel P 11, the luminance value is assumed BL_1 Contribution of light sources are a luminance value 512, the light source is contributed BL_2 luminance value of 384, the light sources are contributed BL_3 96, the luminance of the light source contributed BL_4 The value is 31, then the total brightness value is equal to 512 + 354 + 96 + 31 = 1023. Furthermore, for the backlights BL_1 to BL_4, the individual light amount contribution ratio values on the pixels P11 of the display panel 210 are 512/1023, 384/1023, 96/1023, 31/1023, and the light sources BL_1 to BL_4. The contribution ratio of the light amount at the pixel P 11 is 512/1023: 384/1023: 96/1023: 31/1023. The above description is merely exemplary embodiments and is not intended to limit the invention.

最後，在步驟S350中，調光電路232依據從不同位置處所獲得之光量貢獻比例，決定光源BL_1~BL_s各自的所需強度。如此一來，本發明之調光方法將不再受限於區域調光的方式，而是直接以實際背光分佈情況來調整/驅動背光源，以保證每一畫素都有足夠的背光亮度。 Finally, in step S350, the dimming circuit 232 determines the required intensity of each of the light sources BL_1 BLBL_s based on the light amount contribution ratio obtained from the different positions. In this way, the dimming method of the present invention is no longer limited by the mode of regional dimming, but directly adjusts/drives the backlight with the actual backlight distribution to ensure that each pixel has sufficient backlight brightness.

上述實施例已經詳細說明如何利用光量分佈資訊，來計算出各個光源於一畫素上的光亮貢獻比例，以下將進一步說明上述步驟S350中調光電路232如何藉由光亮貢獻比例來決定各光源所需的強度。圖5為根據一實施例所繪示的圖3中步驟S350的詳細流程圖。請同時參照圖2及圖5，本實施例的方法適用於上述的液晶顯示器20，以下即搭配液晶顯示器20中的各項元件說明本實施例之調光方法的詳細步驟。 The above embodiment has explained in detail how to use the light quantity distribution information to calculate the proportion of the light contribution of each light source on a pixel. The following will further explain how the light adjustment circuit 232 determines the light source by the ratio of the light contribution in the above step S350. The strength required. FIG. 5 is a detailed flowchart of step S350 of FIG. 3 according to an embodiment. Referring to FIG. 2 and FIG. 5 simultaneously, the method of the present embodiment is applied to the liquid crystal display 20 described above, and the detailed steps of the dimming method of the present embodiment will be described below with reference to various elements in the liquid crystal display 20.

為了方便且清楚得說明本發明，在本實施例中，假設s=3，即液晶顯示器20的背光模組240具有3個背光源BL_1~BL_3。此外，更假設經由上述實施方法於各畫素上，針對背光源BL_1~BL_3所計算出來的個別光源貢獻比例值分別為α，β，γ，而光源BL_1~BL_3於該畫素處之光量貢獻比例為α：β：γ。其中α，β，γ皆小於等於1，且α+β+γ=1。 For convenience and clarity of the present invention, in the present embodiment, it is assumed that s=3, that is, the backlight module 240 of the liquid crystal display 20 has three backlights BL_1 BLBL_3. In addition, it is assumed that the contribution values of the individual light sources calculated for the backlights BL_1 BLBL_3 on the respective pixels are respectively α, β, γ, and the light source BL_1~BL_3 contributes to the light amount at the pixel. The ratio is α:β:γ. Wherein α, β, γ are all less than or equal to 1, and α+β+γ=1.

首先，在步驟S510中，針對畫素P11~Pmn當中每一畫素，調光電路232將顯示模組220所提供之畫素的畫素資料轉換為畫素之目標亮度值k。簡單來說，液晶顯示器20為了顯示一畫面，顯示模組220將提供各畫素的畫素資料，以驅動顯示面板210顯示畫面。在本發明中，顯示模組220更可以將各畫素的畫素資料提供至調光電路232，以讓調光電路232據以調整背光源模組240所提供的光源亮度。其中，一些實施例中，調光電路232在步驟S510可以藉由使用GAMMA曲線來將畫素P11~Pmn的畫素資料轉換為目標亮度值k，但本發明對此不限制。在另一些實施例中，步 驟S510也可包括計算畫素的目標亮度值k=DP/DM，其中DP為畫素的畫素資料，而DM為畫素資料的值域的最大值。例如，假設畫素資料的值域的最大值DM為256，而一影像中某畫素的畫素資料DP為128，則畫素的目標亮度值k為128/256=0.5。 First, in step S510, for each pixel in the pixels P 11 to P mn , the dimming circuit 232 converts the pixel data of the pixel provided by the display module 220 into the target luminance value k of the pixel. Briefly, in order to display a picture, the display module 220 will provide pixel data of each pixel to drive the display panel 210 to display a picture. In the present invention, the display module 220 can further provide the pixel data of each pixel to the dimming circuit 232, so that the dimming circuit 232 can adjust the brightness of the light source provided by the backlight module 240. In some embodiments, the dimming circuit 232 can convert the pixel data of the pixels P 11 to P mn into the target luminance value k by using the GAMMA curve in step S510, but the present invention is not limited thereto. In other embodiments, step S510 may also include calculating a target luminance value k=DP/DM of the pixel, where DP is the pixel data of the pixel and DM is the maximum value of the range of the pixel data. For example, if the maximum value DM of the range of the pixel data is 256, and the pixel data DP of a pixel in an image is 128, the target luminance value k of the pixel is 128/256=0.5.

接著，在步驟S530中，調光電路232針對顯示面板210之不同位置當中之每一位置，在符合該位置之目標亮度值k之條件下，根據於該位置處所獲得之光量貢獻比例α：β：γ，獲得至少兩個擇定光源分別之可能所需強度。在本實施例中，針對顯示面板210上所有畫素P11~Pmn，調光電路232可根據各畫素上所獲得之光量貢獻比例α：β：γ，來獲得光源BL_1~BL_3的可能所需強度，且符合各畫素之目標亮度值k。舉例來說，對於光源BL_1而言，調光電路232可依據畫素P11上所獲得之光量貢獻比例α：β：γ，來獲得光源BL_1的可能所需強度。調光電路232亦可依據畫素P12上所獲得之光量貢獻比例α：β：γ，來獲得光源BL_1的可能所需強度。依此類推，光源BL_1基於所有畫素P11~Pmn上所獲得之光量貢獻比例α：β：γ，可獲得相對於畫素P11~Pmn的m*n個可能所需強度。 Next, in step S530, the dimming circuit 232 contributes a ratio α: β according to the amount of light obtained at the position for each position of the different positions of the display panel 210 under the condition that the target brightness value k of the position is met. : γ, obtain the possible required intensity of at least two selected light sources respectively. In this embodiment, for all the pixels P 11 ~P mn on the display panel 210, the dimming circuit 232 can obtain the light source BL_1~BL_3 according to the light amount contribution ratio α:β:γ obtained on each pixel. The required intensity, and meets the target brightness value k of each pixel. For example, the light source BL_1, the contribution to the dimmer circuit 232 may be based on the amount of light of the pixel P 11 obtained by the ratio α: β: γ, may be obtained in the desired intensity of light source BL_1. The dimming circuit 232 can also obtain the possible required intensity of the light source BL_1 based on the light amount contribution ratio α:β:γ obtained on the pixel P 12 . And so on, based on the amount of light the light source BL_1 mn obtained on all the pixels P 11 ~ P contribution ratio of α: β: γ, with respect to the obtained pixel P 11 ~ P mn of the m * n possible desired intensity.

此外，在本發明中依據光亮貢獻比例α：β：γ來獲取光源可能所需強度的方式，可至少分為全域導向(global-oriented)的方式與區域導向(local-oriented)的方式，以下將分別說明之。需先說明的是，假設L1~L3是光源BL_1~BL_3之工作率(duty cycle)為100%的背光強度，對於顯示面板210上的各個畫素而言， α L1+β L2+γ L3=1代表該畫素為最亮的狀態。 In addition, in the present invention, the manner in which the light source may be required to obtain the required intensity according to the light contribution ratio α:β:γ may be at least divided into a global-oriented manner and a local-oriented manner, Will be explained separately. It should be noted that, assuming that L1 to L3 are the backlight intensities of the light source BL_1~BL_3 with a duty cycle of 100%, for each pixel on the display panel 210, α L 1 + β L 2 + γ L 3 =1 means that the pixel is the brightest state.

首先，調光電路232藉由至少兩個擇定光源BL_1~BL_3於位置處之可能所需亮度與個別光量貢獻比例值之對應乘積值之總和值，安排為等於目標亮度值，以計算出至少兩個擇定光源於位置處之可能所需亮度，公式推導如下所示：k(α L1+β L2+γ L3)=k (1) First, the dimming circuit 232 is arranged to be equal to the target brightness value by calculating the sum of the corresponding product values of the possible desired brightness and the individual light quantity contribution ratio values of the at least two selected light sources BL_1~BL_3 to calculate at least the target brightness value. The two selected sources are at the desired brightness at the location. The formula is derived as follows: k(α L 1 +β L 2 +γ L 3 )=k (1)

α(kL1)+β(kL2)+γ(kL3)=k (2) α(kL 1 )+β(kL 2 )+γ(kL 3 )=k (2)

在本實施例中，如式(2)所示，調光電路232藉由光源BL_1~BL_3於各畫素P11~Pmn之可能所需亮度kL1、kL2、kL3與個別光量貢獻比例值α、β與γ之對應乘積值之總和值，安排為等於目標亮度值k。 In this embodiment, as shown in the formula (2), the dimming circuit 232 contributes to the required lightness kL 1 , kL 2 , kL 3 and the individual light amount of the respective pixels P 11 to P mn by the light sources BL_1 BL BL_3 . The sum of the product values of the proportional values α, β and γ is arranged to be equal to the target brightness value k.

接著，在全域導向(global-oriented)的方式中，調光電路232針對顯示面板210之不同位置當中之每一位置，將至少兩個擇定光源BL_1~BL_3之可能所需強度安排為相等。以顯示面板210之畫素P11為例，調光電路232可以將擇定光源BL_1~BL_3之可能所需強度安排為相等，使得光源BL_1~BL_3對畫素P11的亮度貢獻總和可以滿足畫素P11的目標亮度值k。也就是說，調光電路232會檢視每一個畫素P11至Pmn所需要的背光強度，並且平均分配給多個光源BL_1~BL_3，每一個光源BL_1~BL_3對每一個畫素P11至Pmn都有各自的亮度貢獻。 Next, in a global-oriented manner, the dimming circuit 232 arranges the possible required intensities of the at least two selected light sources BL_1~BL_3 to be equal for each of the different positions of the display panel 210. Taking the pixel P 11 of the display panel 210 as an example, the dimming circuit 232 can arrange the possible required intensities of the selected light sources BL_1 BL BL_3 to be equal, so that the sum of the luminance contributions of the light sources BL_1 BLBL_3 to the pixels P 11 can satisfy the drawing. P 11 prime target brightness value k. That is to say, the dimming circuit 232 will view the backlight intensity required for each of the pixels P 11 to P mn , and equally distribute it to the plurality of light sources BL_1 BL BL — 3 , each of the light sources BL_1 BL BL — 3 to each pixel P 11 to P mn has its own brightness contribution.

此外，調光電路232也可以針對顯示面板210之不同位置當中之每一位置，將至少兩個擇定光源BL_1~BL_3當中個別亮 度貢獻比例值α、β與γ小於門檻值之擇定光源之可能所需強度安排為零，以及將至少兩個擇定光源BL_1~BL_3當中之其他擇定光源之可能所需強度安排為相等。簡單來說，調光電路232會設定一個亮度貢獻門檻值。以顯示面板210之畫素P11為例，假設光源BL_3對畫素P11的個別亮度貢獻比例值γ未達到亮度貢獻門檻值，而其他光源BL_1~BL_2對畫素P11的個別亮度貢獻比例值α與β大於門檻值，則調光電路232可以將光源BL_3對畫素P11的可能所需強度安排為零，並藉由增強其他光源BL_1~BL_2的亮度貢獻來補償，使得光源BL_1~BL_2對畫素P11的亮度貢獻總和可以滿足畫素P11的目標亮度值k。對顯示面板210之其他位置/畫素計算光源BL_1~BL_3的可能所需強度可以依此類推。在前述實施例中，已清楚說明如何利用各種機制來選定擇定光源。基於上述可知，在本實施例中所述擇定光源可以是全部的光源BL_1~BL_3，但本發明並不限制於此。因此，在調光電路232選擇好擇定光源BL_1~BL_3之後，再利用門檻值來排除亮度貢獻低的光源。 In addition, the dimming circuit 232 can also select, for each of the different positions of the display panel 210, the individual brightness contribution ratio values α, β, and γ of the at least two selected light sources BL_1 BLBL_3 are smaller than the threshold value. It may be desirable to arrange the intensity to be zero and to arrange the possible required intensities of the other selected ones of the at least two selected sources BL_1~BL_3 to be equal. Briefly, the dimming circuit 232 sets a brightness contribution threshold. Taking the pixel P 11 of the display panel 210 as an example, it is assumed that the light source BL_3 does not reach the luminance contribution threshold value for the individual luminance contribution ratio γ of the pixel P 11 , and the ratio of the other luminances of the other light sources BL_1 BL BL_2 to the pixel P 11 The values α and β are greater than the threshold value, and the dimming circuit 232 can arrange the possible required intensity of the light source BL_3 for the pixel P 11 to zero, and compensate by enhancing the brightness contribution of the other light sources BL_1 BL BL_2, so that the light source BL_1~ BL_2 sum of the luminance of the pixel P 11 of the contribution to satisfy the target brightness value of k pixels P 11. The possible required intensity of the other locations/pixels of the display panel 210 to calculate the light sources BL_1~BL_3 can be deduced by analogy. In the foregoing embodiments, it has been clearly explained how various mechanisms can be utilized to select a selected light source. Based on the above, in the present embodiment, the selected light source may be all of the light sources BL_1 BL BL_3, but the present invention is not limited thereto. Therefore, after the dimming circuit 232 selects the selected light sources BL_1 to BL_3, the threshold value is used to exclude the light source having a low luminance contribution.

另一方面，在區域導向(local-oriented)的方式中，調光電路232針對顯示面板210之不同位置當中之每一位置，根據至少兩個擇定光源BL_1~BL_3之亮度貢獻比例α：β：γ，決定至少兩個擇定光源之可能所需強度之比例。更詳細來說，例如，調光電路232可以將至少兩個擇定光源BL_1~BL_3之可能所需強度之比例決定為等於擇定光源BL_1~BL_3之亮度貢獻比例α：β： γ。公式推導如下所示： 基於式(2)與式(3)，可進而推導出 On the other hand, in a local-oriented manner, the dimming circuit 232 contributes a ratio α: β according to the brightness of the at least two selected light sources BL_1 BL BL_3 for each of the different positions of the display panel 210. : γ, which determines the ratio of the possible required intensity of at least two selected sources. In more detail, for example, the dimming circuit 232 can determine the ratio of the possible required intensities of the at least two selected light sources BL_1 BLBL_3 to be equal to the brightness contribution ratio α: β: γ of the selected light sources BL_1 BLBL_3. The formula is derived as follows: Based on equations (2) and (3), it can be derived

換言之，調光電路232將按照各光源BL_1~BL_3在各畫素上的亮度貢獻比去安排各光源的可能所需亮度。因此，每檢視過一個畫素都會取得一組新的背光比例(可能所需強度的比例)。最後，在步驟S550中，調光電路232針對光源BL_1~BL_3當中每一者，依據光源BL_1~BL_3分別針對不同位置所獲得之可能所需強度，決定光源BL_1~BL_3的所需強度。在本實施例中，調光電路232針對光源BL_1~BL_3當中每一者，找出光源BL_1~BL_3分別針對不同位置所獲得之可能所需強度當中之最大者，作為光源BL_1~BL_3的所需強度。 In other words, the dimming circuit 232 will arrange the possible desired brightness of each light source according to the luminance contribution ratio of each of the light sources BL_1 BLBL_3 on each pixel. Therefore, each time a pixel is viewed, a new set of backlight ratios (proportion of the required intensity) is obtained. Finally, in step S550, the dimming circuit 232 determines the required intensity of the light sources BL_1 BL BL_3 for each of the light sources BL_1 BL BL_3 according to the possible required intensity obtained for the different positions of the light sources BL_1 BL BL_3. In this embodiment, the dimming circuit 232 finds, for each of the light sources BL_1 BL BL_3, the largest of the possible required intensities obtained by the light sources BL_1 BL BL_3 for different positions, as required for the light sources BL_1 BL BL_3 strength.

例如，假設調光電路232只考慮顯示面板210之四個位置(例如畫素P11、畫素P1n、畫素Pm1與畫素Pmn)。假設調光電路232在步驟S530中獲得擇定光源BL_1於畫素P11、畫素P1n、畫素Pm1與畫素Pmn等位置處的可能所需強度分別為L111、L11n、L1m1與L1mn，則調光電路232在步驟S550中可以從可能所需強度L111、L11n、L1m1與L1mn中找出最大者，作為光源BL_1的所需強度。相似地，假設調光電路232在步驟S530中獲得擇定光源 BL_2於畫素P11、畫素P1n、畫素Pm1與畫素Pmn等位置處的可能所需強度分別為L211、L21n、L2m1與L2mn，則調光電路232在步驟S550中可以從可能所需強度L211、L21n、L2m1與L2mn中找出最大者，作為光源BL_2的所需強度。 For example, it is assumed that the dimming circuit 232 considers only four positions of the display panel 210 (for example, pixel P 11 , pixel P 1n , pixel P m1 and pixel P mn ). It is assumed that the dimming circuit 232 obtains the possible required intensities of the selected light source BL_1 at the positions of the pixel P 11 , the pixel P 1n , the pixel P m1 and the pixel P mn in steps S530, respectively, L1 11 , L1 1n , L1 m1 and L1 mn , the dimming circuit 232 can find the largest one of the possible required intensities L1 11 , L1 1n , L1 m1 and L1 mn as the required intensity of the light source BL_1 in step S550. Similarly, assuming the dimmer circuit 232 is obtained in step S530 to fix a light source that may be needed BL_2 intensity at pixel position P 11, the pixel P 1n, pixel P m1 and P mn other pixels are L2 11, L2 1n , L2 m1 and L2 mn , the dimming circuit 232 can find the largest one of the possible required intensities L2 11 , L2 1n , L2 m1 and L2 mn as the required intensity of the light source BL_2 in step S550.

也就是說，多個光源BL_1~BL_3中的每一個光源在每一個畫素P11~Pmn位置上都有不同的可能所需光源強度。調光電路232會在這些不同的可能所需光源強度中找出一個最大值，作為多個光源BL_1~BL_3中每一個光源所需要的最大強度。 That is to say, each of the plurality of light sources BL_1~BL_3 has different possible required light source intensities at each pixel P 11 ~P mn position. The dimming circuit 232 will find a maximum value among these different possible desired light source intensities as the maximum intensity required for each of the plurality of light sources BL_1~BL_3.

綜上所述，本發明本發明所提供之背光模組的調光方法與調光裝置，藉由每一光源的光量分佈資訊來調整各光源的光強度。如此一來，調光方法將不再受限於分區的方式，而是直接以實際背光分佈情況來驅動背光源，進而確保每一畫素都具有足夠的背光亮度，以正確的顯示各個畫素的畫素內容。此外，由於本發明是藉由實際背光分佈情況來驅動背光源，因此可以讓導光板的設計更加自由，以避免因導光板導光不平均而造成部份顯示區塊亮度不足，進而提昇側光式液晶顯示器之顯示品質。 In summary, the dimming method and the dimming device of the backlight module provided by the present invention adjust the light intensity of each light source by using the light quantity distribution information of each light source. In this way, the dimming method will no longer be limited by the way of partitioning, but directly drive the backlight with the actual backlight distribution, thereby ensuring that each pixel has sufficient backlight brightness to correctly display each pixel. The pixel content. In addition, since the present invention drives the backlight by the actual backlight distribution, the design of the light guide plate can be made more free, so as to avoid insufficient brightness of some display blocks due to uneven light guiding of the light guide plate, thereby improving the side light. Display quality of liquid crystal displays.

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，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

S310~S350‧‧‧本發明一實施例之背光模組的調光方法的步驟 S310~S350‧‧‧ steps of dimming method of backlight module according to an embodiment of the invention

Claims (38)

一種背光模組的調光方法，包括：對於一顯示面板中多個不同位置中的每一位置，根據一背光模組中與該位置對應的多個光源各自對於該顯示面板的光量分佈資訊，分別獲得該些光源之多個光量貢獻比例，其中該些光源當中每一者之光量分佈資訊係相關於該光源於該顯示面板之多個畫素當中每一畫素位置所貢獻之亮度值；以及依據從該些不同位置所獲得之該些光量貢獻比例，決定於該顯示面板顯示影像畫面時該些光源各自的所需強度。 A dimming method for a backlight module, comprising: for each of a plurality of different positions in a display panel, according to a light quantity distribution information of each of the plurality of light sources corresponding to the position in a backlight module, Obtaining a plurality of light quantity contribution ratios of the light sources, wherein the light quantity distribution information of each of the light sources is related to a brightness value contributed by each light source position of the plurality of pixels of the display panel; And determining the required intensity of the light sources when the display panel displays the image screen according to the light quantity contribution ratios obtained from the different positions. 如申請專利範圍第1項所述背光模組的調光方法，其中於該顯示面板之該些不同位置係包括該顯示面板之多個畫素當中之每一畫素。 The dimming method of the backlight module of claim 1, wherein the different positions of the display panel comprise each pixel of the plurality of pixels of the display panel. 如申請專利範圍第1項所述背光模組的調光方法，其中分別獲得該些光源之該些光量貢獻比例之步驟係包括：對於各畫素，分別獲得該背光模組當中與該畫素對應之至少二個擇定光源之該光量貢獻比例。 The method of dimming a backlight module according to claim 1, wherein the step of obtaining the light quantity contribution ratios of the light sources respectively comprises: obtaining, for each pixel, the pixel in the backlight module Corresponding to the amount of light contribution of at least two selected light sources. 如申請專利範圍第3項所述背光模組的調光方法，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中之全部光源。 The dimming method of the backlight module of claim 3, wherein the at least two selected light sources corresponding to the pixels comprise all of the light sources in the backlight module. 如申請專利範圍第3項所述背光模組的調光方法，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中與該畫素最相鄰之至少兩個光源。 The dimming method of the backlight module of claim 3, wherein the at least two selected light sources corresponding to the pixel comprise at least two of the backlight modules that are most adjacent to the pixel. light source. 如申請專利範圍第3項所述背光模組的調光方法，其中該顯示面板係劃分為複數區域，與該背光模組包含的全部光源分別對應，以及所述與該畫素對應之至少二個擇定光源係包括該畫素所位於區域之對應光源，以及該畫素所位於區域之至少一相鄰區域之至少一對應光源。 The dimming method of the backlight module of claim 3, wherein the display panel is divided into a plurality of regions, respectively corresponding to all the light sources included in the backlight module, and the at least two corresponding to the pixels The selected light source comprises a corresponding light source in a region where the pixel is located, and at least one corresponding light source in at least one adjacent region of the region in which the pixel is located. 如申請專利範圍第1項所述背光模組的調光方法，其中根據該背光模組中與該位置對應的該些光源各自對於該顯示面板的光量分佈資訊，分別獲得該些光源之該些光量貢獻比例之步驟係包括：根據該些光源中的該些光量分佈資訊，分別獲得該些光源之多個亮度值；根據於該位置所獲得之該些光源之該些亮度值，獲得該位置之一總亮度值；以及藉由計算該些光源於該位置之該些亮度值分別與該總亮度值之比值作為該些光源於該位置之個別光量貢獻比例值，獲得該些光源於該位置之該光量貢獻比例。 The dimming method of the backlight module of claim 1, wherein the light sources respectively obtain information about the light quantity distribution information of the light source corresponding to the position in the backlight module. The step of the light quantity contribution ratio includes: obtaining a plurality of brightness values of the light sources according to the light quantity distribution information in the light sources; obtaining the position according to the brightness values of the light sources obtained at the position a total brightness value; and calculating a ratio of the brightness values of the light sources to the total brightness value as the individual light quantity contribution ratio values of the light sources at the position, obtaining the light sources at the position The amount of light contributes to the ratio. 如申請專利範圍第1項所述背光模組的調光方法，其中依據針對該顯示面板之該些畫素所獲得之該些光量貢獻比例，決定於該顯示面板顯示影像畫面時該些光源的該所需強度之步驟包括：(i)針對該顯示面板之該些不同位置當中之每一位置，在符合該位置之一目標亮度值之條件下，根據於該位置所獲得之該光量貢 獻比例，獲得該至少兩個擇定光源分別之可能所需強度；以及(ii)針對該些光源當中每一者，依據該光源分別針對該些不同位置所獲得之該些可能所需強度，決定該光源於該顯示面板顯示影像畫面時的該所需強度。 The dimming method of the backlight module of claim 1, wherein the light source contribution ratio obtained by the pixels for the display panel is determined by the light source when the display panel displays the image image. The step of the required intensity includes: (i) for each of the different positions of the display panel, under the condition that the target brightness value of one of the positions is met, the amount of light obtained according to the position is tributed Ratio, obtaining the possible required intensity of the at least two selected light sources; and (ii) for each of the light sources, depending on the possible required intensity obtained by the light source for the different locations, Determining the required intensity of the light source when displaying the image on the display panel. 如申請專利範圍第8項所述背光模組的調光方法，更包括：針對該些畫素當中每一畫素，將該畫素的畫素資料轉換為該畫素之該目標亮度值。 The dimming method of the backlight module of claim 8, further comprising: converting, for each pixel of the pixels, the pixel data of the pixel into the target brightness value of the pixel. 如申請專利範圍第9項所述背光模組的調光方法，其中將該畫素的畫素資料轉換該目標亮度值之步驟係藉由使用一GAMMA曲線來實施。 The dimming method of the backlight module of claim 9, wherein the step of converting the pixel data of the pixel into the target brightness value is performed by using a GAMMA curve. 如申請專利範圍第9項所述背光模組的調光方法，其中將該畫素的畫素資料轉換該目標亮度值之步驟包括：計算k=DP/DM，其中k為該畫素的該目標亮度值，DP為該畫素的該畫素資料，而DM為該畫素資料的一值域的最大值。 The method of dimming a backlight module according to claim 9, wherein the step of converting the pixel data of the pixel into the target brightness value comprises: calculating k=DP/DM, where k is the pixel The target luminance value, DP is the pixel data of the pixel, and DM is the maximum value of the range of the pixel data. 如申請專利範圍第8項所述背光模組的調光方法，其中根據於該位置所獲得之該光量貢獻比例，獲得該至少兩個擇定光源分別之可能所需強度之步驟係包括：藉由該至少兩個擇定光源於該位置之該些可能所需亮度與個別光量貢獻比例值之對應乘積值之一總和值，安排為等於該目標亮度值，以計算出該至少兩個擇定光源於該位置之該些可能所需亮度。 The dimming method of the backlight module of claim 8, wherein the step of obtaining the possible required intensity of the at least two selected light sources according to the light amount contribution ratio obtained at the position includes: And a sum of the corresponding product values of the possible desired brightness and the individual light quantity contribution ratio values of the at least two selected light sources at the position is arranged to be equal to the target brightness value to calculate the at least two selections The light source may have the desired brightness at that location. 如申請專利範圍第8項所述背光模組的調光方法，其中 步驟(i)更包括：針對該顯示面板之該些不同位置當中之每一位置，將該至少兩個擇定光源之該些可能所需強度安排為相等。 The dimming method of the backlight module according to claim 8 of the patent application, wherein The step (i) further includes: arranging the possible required intensities of the at least two selected light sources to be equal for each of the different positions of the display panel. 如申請專利範圍第8項所述背光模組的調光方法，其中步驟(i)更包括：針對該顯示面板之該些不同位置當中之每一位置，將該至少兩個擇定光源當中亮度貢獻比例值小於一門檻值之擇定光源之可能所需強度安排為零，以及將該至少兩個擇定光源當中之其他擇定光源之該可能所需強度安排為相等。 The dimming method of the backlight module of claim 8, wherein the step (i) further comprises: brightnessing the at least two selected light sources for each of the different positions of the display panel The possible required intensity of the selected source having a contribution ratio value less than a threshold value is zero, and the possible required intensity of the other selected ones of the at least two selected sources are arranged to be equal. 如申請專利範圍第8項所述背光模組的調光方法，其中步驟(i)更包括：針對該顯示面板之該些不同位置當中之每一位置，根據該至少兩個擇定光源之該亮度貢獻比例，決定該至少兩個擇定光源之該些可能所需強度之比例。 The dimming method of the backlight module of claim 8, wherein the step (i) further comprises: for each of the different positions of the display panel, according to the at least two selected light sources The brightness contribution ratio determines the ratio of the possibly required intensities of the at least two selected sources. 如申請專利範圍第15項所述背光模組的調光方法，其中根據該至少兩個擇定光源之該亮度貢獻比例，決定該至少兩個擇定光源之該些可能所需強度之比例之步驟係包括：將該至少兩個擇定光源之該些可能所需強度之比例決定為等於該至少兩個擇定光源之該亮度貢獻比例。 The dimming method of the backlight module of claim 15, wherein the ratio of the possible required intensities of the at least two selected light sources is determined according to the brightness contribution ratio of the at least two selected light sources. The step of determining includes determining a ratio of the possible required intensities of the at least two selected light sources to be equal to the brightness contribution ratio of the at least two selected light sources. 如申請專利範圍第8項所述背光模組的調光方法，其中步驟(ii)所述決定該些光源的亮度係包括：針對該些光源當中每一者，找出該光源分別針對該些不同位置所獲得之該些可能所需強度當中之一最大者，作為該光源的該所需強度。 The dimming method of the backlight module of claim 8, wherein the determining the brightness of the light sources according to step (ii) comprises: finding, for each of the light sources, the light sources respectively for the light sources The largest of the possible required strengths obtained at different locations is the desired intensity of the source. 一種背光模組的調光方法，包括：根據一背光模組中，與一顯示面板中多個畫素當中每一畫素位置對應之至少二個擇定光源的光量分佈資訊，獲得該至少兩個擇定光源對於該畫素位置之光量貢獻比例；針對該顯示面板之該些畫素位置當中之每一位置，在符合該位置之一目標亮度值之條件下，根據於該位置所獲得之該光量貢獻比例，獲得該至少兩個擇定光源分別之可能所需強度；以及針對該些光源當中每一者，依據該光源分別針對該些不同位置所獲得之該些可能所需強度，決定該光源於該顯示面板顯示影像畫面時的一所需強度。 A method for dimming a backlight module, comprising: obtaining at least two light quantity distribution information of at least two selected light sources corresponding to each pixel position of a plurality of pixels in a display panel according to a backlight module Selecting a light source to contribute a ratio of the amount of light of the pixel position; for each position of the pixel positions of the display panel, according to a target brightness value of the position, according to the position The light quantity contribution ratio is obtained for each of the at least two selected light sources respectively; and for each of the light sources, determining the possible required intensity obtained for the different positions according to the light source respectively The light source has a desired intensity when the image panel is displayed on the display panel. 如申請專利範圍第18項所述背光模組的調光方法，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中之全部光源或一部分光源。 The dimming method of the backlight module of claim 18, wherein the at least two selected light sources corresponding to the pixels comprise all or a part of the light sources in the backlight module. 一種背光模組的調光裝置，包括：一資料庫，提供一背光模組的多個光源各自對一顯示面板的光量分佈資訊；以及一調光電路，耦接至該資料庫，該調光電路對於該顯示面板中多個不同位置中的每一位置，根據該背光模組中與該位置對應的多個光源各自對於該顯示面板的光量分佈資訊，分別獲得該些光源之多個光量貢獻比例，以及依據從該些不同位置所獲得之該些光量貢獻比例，決定該些光源於該顯示面板顯示影像畫面時各自的所需強度； 其中，該些光源當中每一者之光量分佈資訊係相關於該光源於該顯示面板之多個畫素當中每一畫素位置所貢獻之亮度值。 A dimming device for a backlight module, comprising: a data library, providing light distribution information of a plurality of light sources of a backlight module to a display panel; and a dimming circuit coupled to the data library, the dimming The circuit obtains a plurality of light quantity contributions of the light sources according to the light quantity distribution information of the plurality of light sources corresponding to the position in the backlight module for each of the plurality of different positions in the display panel. a ratio, and determining a required intensity of the light sources when displaying the image on the display panel according to the light quantity contribution ratios obtained from the different positions; The light quantity distribution information of each of the light sources is related to a brightness value contributed by the light source to each pixel position of the plurality of pixels of the display panel. 如申請專利範圍第20項所述背光模組的調光裝置，其中於該顯示面板之該些不同位置係包括該顯示面板之多個畫素當中之每一畫素。 The dimming device of the backlight module of claim 20, wherein each of the plurality of pixels of the display panel is included in the different positions of the display panel. 如申請專利範圍第20項所述背光模組的調光裝置，其中該調光電路對於各畫素，分別獲得該背光模組當中與該畫素對應之至少二個擇定光源之該光量貢獻比例。 The dimming device of the backlight module of claim 20, wherein the dimming circuit obtains the light quantity contribution of at least two selected light sources corresponding to the pixel in the backlight module for each pixel. proportion. 如申請專利範圍第22項所述背光模組的調光裝置，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中之全部光源。 The dimming device of the backlight module of claim 22, wherein the at least two selected light sources corresponding to the pixels comprise all of the light sources in the backlight module. 如申請專利範圍第22項所述背光模組的調光裝置，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中與該畫素最相鄰之至少兩個擇定光源。 The dimming device of the backlight module of claim 22, wherein the at least two selected light sources corresponding to the pixel comprise at least two of the backlight modules that are most adjacent to the pixel. Select the light source. 如申請專利範圍第22項所述背光模組的調光裝置，其中該顯示面板係劃分為複數區域，與該背光模組包含的全部光源分別對應，以及所述與該畫素對應之至少二個擇定光源係包括該畫素所位於區域之對應光源，以及該畫素所位於區域之至少一相鄰區域之至少一對應光源。 The dimming device of the backlight module of claim 22, wherein the display panel is divided into a plurality of regions, respectively corresponding to all the light sources included in the backlight module, and the at least two corresponding to the pixels The selected light source comprises a corresponding light source in a region where the pixel is located, and at least one corresponding light source in at least one adjacent region of the region in which the pixel is located. 如申請專利範圍第20項所述背光模組的調光裝置，其中該調光電路分別對於該顯示面板之該些不同位置當中每一者，進行下述步驟：根據該些光源中的該些光量分佈資訊，分別獲得該 些光源之多個亮度值；根據於該位置所獲得之該些光源之該些亮度值，獲得該位置之一總亮度值；以及藉由計算該些光源於該位置之該些亮度值分別與該總亮度值之比值作為該些光源於該位置之個別光量貢獻比例值，獲得該些光源於該位置之該光量貢獻比例。 The dimming device of the backlight module of claim 20, wherein the dimming circuit performs the following steps for each of the different positions of the display panel: according to the light sources Light quantity distribution information, respectively obtained a plurality of brightness values of the light sources; obtaining, according to the brightness values of the light sources obtained at the position, a total brightness value of the position; and calculating the brightness values of the light sources at the position respectively The ratio of the total brightness values is used as the ratio of the individual light amount contributions of the light sources at the position, and the light source contribution ratio of the light sources at the position is obtained. 如申請專利範圍第20項所述背光模組的調光裝置，其中該調光電路針對該顯示面板之該些不同位置當中之每一位置，在符合該位置之一目標亮度值之條件下，根據於該位置所獲得之該光量貢獻比例，獲得該至少兩個擇定光源分別之可能所需強度；以及該調光電路針對該些光源當中每一者，依據該光源分別針對該些不同位置所獲得之該些可能所需強度，決定該光源於該顯示面板顯示影像畫面時的該所需強度。 The dimming device of the backlight module of claim 20, wherein the dimming circuit is configured to meet a target brightness value of the position of the display panel for each of the different positions of the display panel. Obtaining a possible required intensity of the at least two selected light sources according to the light amount contribution ratio obtained at the position; and the dimming circuit is configured for each of the light sources according to the light source respectively for the different positions The required intensity obtained is determined by the required intensity of the light source when the image is displayed on the display panel. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路針對該些畫素當中每一畫素，將該畫素的畫素資料轉換為該畫素之該目標亮度值。 The dimming device of the backlight module of claim 27, wherein the dimming circuit converts the pixel data of the pixel into the target brightness of the pixel for each pixel of the pixels value. 如申請專利範圍第28項所述背光模組的調光裝置，其中該調光電路係藉由使用一GAMMA曲線來將該畫素的畫素資料轉換該目標亮度值。 The dimming device of the backlight module of claim 28, wherein the dimming circuit converts the pixel data of the pixel into the target brightness value by using a GAMMA curve. 如申請專利範圍第28項所述背光模組的調光裝置，其中該調光電路計算k=DP/DM，其中k為該畫素的該目標亮度值，DP為該畫素的該畫素資料，而DM為該畫素資料的一值域的最大值。 The dimming device of the backlight module of claim 28, wherein the dimming circuit calculates k=DP/DM, where k is the target brightness value of the pixel, and DP is the pixel of the pixel. Data, and DM is the maximum value of the range of the pixel data. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路藉由該至少兩個擇定光源於該位置之該些可能所需亮度與個別光量貢獻比例值之對應乘積值之一總和值，安排為等於該目標亮度值，以計算出該至少兩個擇定光源於該位置之該些可能所需亮度。 The dimming device of the backlight module of claim 27, wherein the dimming circuit has a corresponding product of the possible required brightness and the individual light amount contribution ratio values of the at least two selected light sources at the position. A sum value of values, arranged to be equal to the target brightness value, to calculate the possible desired brightness of the at least two selected sources at the location. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路針對該顯示面板之該些不同位置當中之每一位置，將該至少兩個擇定光源之該些可能所需強度安排為相等。 The dimming device of the backlight module of claim 27, wherein the dimming circuit is for each of the different positions of the display panel, the possible locations of the at least two selected light sources The required intensity is arranged to be equal. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路針對該顯示面板之該些不同位置當中之每一位置，將該至少兩個擇定光源當中亮度貢獻比例值小於一門檻值之擇定光源之可能所需強度安排為零，以及將該至少兩個擇定光源當中之其他擇定光源之該可能所需強度安排為相等。 The dimming device of the backlight module of claim 27, wherein the dimming circuit contributes a brightness contribution ratio among the at least two selected light sources for each of the different positions of the display panel. The desired intensity of the selected source of light less than a threshold is arranged to zero, and the possible required intensity of the other selected ones of the at least two selected sources are arranged to be equal. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路針對該顯示面板之該些不同位置當中之每一位置，根據該至少兩個擇定光源之該亮度貢獻比例，決定該至少兩個擇定光源之該些可能所需強度之比例。 The dimming device of the backlight module of claim 27, wherein the dimming circuit is configured according to the brightness contribution ratio of the at least two selected light sources for each of the different positions of the display panel Determining the ratio of the possibly required intensities of the at least two selected sources. 如申請專利範圍第34項所述背光模組的調光裝置，其中該調光電路將該至少兩個擇定光源之該些可能所需強度之比例決定為等於該至少兩個擇定光源之該亮度貢獻比例。 The dimming device of the backlight module of claim 34, wherein the dimming circuit determines a ratio of the possible required intensities of the at least two selected light sources to be equal to the at least two selected light sources. This brightness contributes a ratio. 如申請專利範圍第27項所述背光模組的調光裝置，其中該調光電路針對該些光源當中每一者，找出該光源分別針對該些 不同位置所獲得之該些可能所需強度當中之一最大者，作為該光源的該所需強度。 The dimming device of the backlight module of claim 27, wherein the dimming circuit finds the light source for each of the light sources respectively The largest of the possible required strengths obtained at different locations is the desired intensity of the source. 一種背光模組的調光裝置，包括：一資料庫，提供該背光模組的多個光源各自對一顯示面板的光量分佈資訊；一調光電路，耦接至該資料庫，該調光電路於該顯示面板之多個畫素當中之每一畫素位置，分別根據該些光源中與該畫素位置對應之至少二個擇定光源的該些光量分佈資訊，獲得該至少兩個擇定光源對於該畫素之光量貢獻比例；該調光電路針對該顯示面板之該些畫素位置當中之每一位置，在符合該位置之一目標亮度值之條件下，根據於該位置所獲得之該光量貢獻比例，獲得該至少兩個擇定光源分別之可能所需強度；以及該調光電路針對該些光源當中每一者，依據該光源分別針對該些不同位置所獲得之該些可能所需強度，決定該光源於該顯示面板顯示影像畫面時的一所需強度。 A dimming device for a backlight module, comprising: a data library, providing light distribution information of each of the plurality of light sources of the backlight module to a display panel; a dimming circuit coupled to the data library, the dimming circuit Obtaining the at least two selections according to the light quantity distribution information of the at least two selected light sources corresponding to the pixel positions in the light sources for each pixel position of the plurality of pixels of the display panel a ratio of the light source to the amount of light of the pixel; the dimming circuit is obtained according to the position of each of the pixel positions of the display panel under the condition that the target brightness value of the position is met The light quantity contribution ratio is obtained, respectively, the possible required intensity of the at least two selected light sources; and the dimming circuit for each of the light sources, according to the light source respectively obtaining the possible locations for the different positions The intensity is required to determine a desired intensity of the light source when the image is displayed on the display panel. 如申請專利範圍第37項所述背光模組的調光裝置，其中所述與該畫素對應之至少二個擇定光源係包括該背光模組當中之全部光源或一部分光源。 The dimming device of the backlight module of claim 37, wherein the at least two selected light sources corresponding to the pixels comprise all or a part of the light sources in the backlight module.
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