200822033 WP9511-C400-0574 22549twf.doc/n 九、發明說明： 【發明所屬之技術領域】 本發明是關於-種背光處理系統與其方法，且 :1::=高晝面明暗對比與調整背光亮度的背光處理ί 【先前技術】 早期具液晶螢幕之電子裳置為達到節省功率消耗，奋 Ο 從背光模組來雜發光亮度，或由制者操作電子裝; 日寸’使用者自行調整背光模組的亮度，因此可以達到 的省電功能，但晝面品質會受到影響，對於傳統背光^ 没计方式，有時調整背光過亮或過暗，都可能會造成觀賞 時的不舒服感。 、 ▲另一習知技術則揭露根據晝面信號，對背光控制進行 動態調整，請參考圖1’圖i !會示習知技術之背光處理系 統架構圖，在此習知技術中，晝面信號會輸入至顯示控制 單元（DisP_ Co血〇1 P〇rtion)14、平均亮度偵測單元 (Average Brightness Detecting Porti〇n) i 5 與最高偵測單元 (Peak Detecting P〇rti〇n)16等單元，以進行處理，其中，顯 ，控制單元14將輸入晝面信號轉換為液晶顯示屏幕u所 能顯示的資料模式’平均亮度偵測單元15針對晝面信號進 行平均免度計算，並將所得之平均亮度信號AVE當成背 光調整參數傳送至背光控制單元13，最高偵測單元16對 於不同旦面仏號之晝素資訊進行最高值(peak value)的運 异以得到最高信號PEK ’並且傳送此最高信號pEK給背光 200822033 WP9511-C400-0574 22549twf.doc/n 控乍為背光調整，接著，背光控制單元i3根掳 ^^^5#bAVE與最高信號PEK做判斷’以進行背井 壳度調整，然而，此習知技術雖铁 金月先 到二:效’但是所顯示的畫面:背光二::面2 的眼，會明顯覺得晝面顯示偏暗，因 = 付疲累、不舒服。 、了曰見 【發明内容】 本發明提供-種背光處㈣統 " 晝面信號之晝素作適當的調整，調整後之對 始晝面品質般，但卻可以節省功率消耗。—1同原 本發明再提供一種背朵# ?古 的明暗㈣h ,域可以增加晝面書素 的月暗：比，並可以降低背光亮度來達到節 ：： 耗’且輸出晝面可以有舒適的視覺效果。 / u 換箪ί發Γ的範例提出—歸光處㈣統，其包括晝素轉 ㈣效旦面貝齡佈單元、晝面資訊判斷單元、以及* 評估單元，且晝素轉換單元用以接收 月 根據晝面信號調整畫素灰階值並輸出至—液晶顯示2 晝^訊分佈單元接收晝面信號，根據晝面信號之二 階：佈情形做灰階值對晝素分佈數量之統計，來u輪：二1 =貝^ ’畫面貧訊判斷單元搞接至晝面資訊分佈單元之 出:畫面資訊判斷單元根據關係資料來得到—參考， 號用來表示晝面的明暗程度，背光調整評。元 :=二，訊判斷單元之輸出，此背光調整評估單元根 據參考Μ進行背光調整，進而調整1光模組 6 200822033 WP9511-C400-0574 22549twf.doc/n 度，而背光模組用以發出光至液晶顯示屏幕。 上述之背光處理系統，在一實施例中，晝素轉換 根據一查表來轉換晝面信號，晝面資訊分佈單元取出書 信號之每-晝素之最大灰階值，計算每—灰階值的書ς八 佈數量’並輸出灰階值對晝素分佈數量的關係資料了查二 資訊判斷單元累加晝素分佈數量，當累加結果大於或^於 晝面信號之總晝素的—比例數量時，輸出參考信號，其中 參考信號為累加結果之對應灰階值，背光調整評估°: 根據參考信號，並根據第—參考值、第二參考值、上= ^下限值，輸出-背光調整值，f細整輪出值用以調整 月光核組的背光亮度，其中當參考信號介於第—參考值與 限值之f树’以第—調整值作騎光輕值；當參考^ 號介於第-參考值與第二參考值之間時，以第二調整值^ 為背光調整值；當參考信號介於第二參考值與上限 時’背光調整值表示如下：200822033 WP9511-C400-0574 22549twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a backlight processing system and a method thereof, and: 1::= high contrast light and dark contrast and adjustment backlight brightness Backlight processing ί [Prior Art] Early electronic screens with LCD screens to save power consumption, to stimulate the brightness of the backlight module, or to operate the electronic device by the manufacturer; The brightness of the group, so the power saving function can be achieved, but the quality of the kneading surface will be affected. For the traditional backlight, the backlight is too bright or too dark, which may cause discomfort during viewing. ▲ Another conventional technique reveals that the backlight control is dynamically adjusted according to the kneading signal. Please refer to FIG. 1 'Fig. i! A schematic diagram of a backlight processing system of the prior art. In this prior art, The signal is input to the display control unit (DisP_ Co Blood 1 P〇rtion) 14, Average Brightness Detecting Porti〇n i 5 and Peak Detecting P〇rti〇n 16 a unit for processing, wherein, the control unit 14 converts the input kneading signal into a data mode that can be displayed on the liquid crystal display screen u. The average brightness detecting unit 15 performs an average exemption calculation for the kneading signal, and the result is obtained. The average brightness signal AVE is transmitted to the backlight control unit 13 as a backlight adjustment parameter, and the highest detection unit 16 performs a peak value difference for the pixel information of different deniers to obtain the highest signal PEK 'and transmits the same. The highest signal pEK is given to the backlight 200822033 WP9511-C400-0574 22549twf.doc/n. The backlight is adjusted. Then, the backlight control unit i3 掳^^^5#bAVE and the highest signal PEK are judged' In order to adjust the shell size of the back well, however, this conventional technique is the first to use the effect of the iron-gold month: but the displayed picture: the backlight 2:: the face 2 of the eye, it will obviously feel that the face is dark, because = tired Not comfortable.发明 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光-1 with the original invention further provides a kind of back #? Ancient light and dark (four) h, the domain can increase the moon darkness of the face book: ratio, and can reduce the brightness of the backlight to reach the festival:: consumption 'and output can be comfortable Visual effect. The example of /u is changed to 归 Γ — 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归 归The moon adjusts the gray scale value according to the kneading signal and outputs it to the liquid crystal display 2 昼 讯 分布 分布 分布 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 昼 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布 分布u round: 2 1 = Bay ^ 'The picture poor judgment unit is connected to the information distribution unit of the face: the picture information judgment unit is obtained according to the relationship data - reference, the number is used to indicate the brightness of the face, the backlight adjustment evaluation . Yuan:=2, the output of the judging unit, the backlight adjustment evaluation unit performs backlight adjustment according to the reference ,, and then adjusts the 1 optical module 6 200822033 WP9511-C400-0574 22549twf.doc/n degrees, and the backlight module is used to issue Light to the LCD screen. In the above backlight processing system, in an embodiment, the pixel conversion converts the kneading signal according to a look-up table, and the kneading information distribution unit extracts the maximum grayscale value of each of the book signals, and calculates each grayscale value. The number of books and the number of the eight cloths and the relationship between the output of the gray scale value and the number of the distribution of the elements. The information of the two information judgment units accumulates the number of distributions of the elements. When the cumulative result is greater than or equal to the total number of elements of the signal When the reference signal is output, wherein the reference signal is the corresponding gray scale value of the accumulated result, the backlight adjustment is evaluated: according to the reference signal, and according to the first reference value, the second reference value, the upper = ^ lower limit value, the output-backlight adjustment Value, f fine round out value is used to adjust the backlight brightness of the moonlight core group, wherein when the reference signal is between the first reference value and the limit value of the f tree', the first adjustment value is used as the light value of the ride; When between the first reference value and the second reference value, the second adjustment value is used as the backlight adjustment value; when the reference signal is between the second reference value and the upper limit, the backlight adjustment value is expressed as follows:
Backdim=APGL/UP， σ 其中，Backdim代表背光調整值，ApGL代表參考信 號’ UP代表上限值。 從另一觀點來看，本發明另提出一種背光處理方法包 括下列步驟：-晝面信號調整、一平均晝素灰階分析、以 及-¾光調整評估，且晝面信號調整步驟，接收晝面信號， 轉換晝面信號之晝素並傳制紅顯示屏幕；平均晝素灰 P白分析步驟’接收晝面信號，輸出—參考信號；以及背光 調整評估倾，根據參考信號進行#光雜，以調整光源 7 200822033 WP9511-C400-0574 22549twf.doc/n 的背光亮度。 上述之背光處理方法，在一實施例中 =更包括下列步驟:一晝面資訊分佈、以= 所’且晝面貢訊分佈之步驟，根據晝面信號之晝素 =皆分=情形來輸出灰階值與晝素分佈數量的關係資料'、 =資訊判斷之步驟’接收關係資料並進行分析判 断後，輸出可進行背光調整的參考信號。Backdim=APGL/UP, σ where Backdim represents the backlight adjustment value and ApGL represents the reference signal 'UP' represents the upper limit value. From another point of view, the present invention further provides a backlight processing method comprising the following steps: - kneading surface signal adjustment, an average pixel gray scale analysis, and -3⁄4 light adjustment evaluation, and kneading signal adjustment step, receiving kneading surface Signal, convert the element of the kneading signal and transmit the red display screen; the average pixel gray P white analysis step 'receives the kneading signal, the output-reference signal; and the backlight adjustment evaluation tilt, according to the reference signal, #光杂, Adjust the backlight brightness of the light source 7 200822033 WP9511-C400-0574 22549twf.doc/n. In the above embodiment, the backlight processing method further includes the following steps: a step information distribution, a step of = and a distribution of the tribute, and output according to the parameter of the face signal = all points = situation The relationship between the grayscale value and the number of halogen distributions The data ', = the step of information judgment' receives the relationship data and analyzes and judges, and outputs a reference signal that can be adjusted for backlight.
u >本發”光處理系統因採用晝面信號之晝素與 冗^之輸出作適當的亮度調整，因此隨著不同的晝面传號 =輸入、，背光處理系統可以適當地調整出晝面晝素 〇 1亚配合減少的光源亮度調整，能夠使輸出的顯示晝 面，讓人眼感覺舒適，所呈現出的效果如同原始畫面品質 般，但卻可以達到節省功率消耗。 一 為讓本發明之上述和其他目的、特徵和優點能更明顯 董下文知舉本發明之實施例，並配合所附圖式，作詳 細說明如下。 _ 【實施方式】 一為了改進習知技術的缺點，達到調整後之晝面品質如 同原始晝面品質般，在本發明實施 ，之畫素的明暗對比。此外，為達到節;== ;ί 2發明實施例根據晝面信號適當地調整背光亮度。 請參照圖2，圖2緣示本發明一實施例之背光處理 統架構圖。背光處理系、統·包括晝素轉換單元210、^ 均晝素灰階分析單元22〇及背光調整評估單元23〇。其中， 8 Ο ο 200822033 WP9511-C400-0574 22549twf.doc/n 平均晝素灰Ρ皆分析單元220包括晝面資訊分佈單元221及 J面資，判斷單元222，上述各單元之柄接關係如下，晝 兀210用以接收畫面信號’根據晝面信號調整灰 Ρ白值並傳达至液晶顯示屏幕25G來顯示，畫面資訊分佈單 接收晝面信號，晝面f訊分佈單^ 221之輸出浦 ，旦面賴判斷單元222，晝面資訊判斷單元222之輸出 馬接至月光5周整汗估單元230 ’背光調整評估單元23〇之 輪出麵接至背光模組，接著，朗本發明實施例。 請蒼照圖3，圖3緣示晝素轉換單元21〇的輸入晝素 ^輸出晝素之灰階映射㈣圖。圖3中有兩條線··實線盘 ，線，實線代表沒有做任何灰階值改變，亦即輸入晝素的 f皆值等於輸出晝素的灰階值，虛線縣本發明之實施例 =，用之轉換曲線，將信號職（紅、綠、藍）轉換成信 j G B’，透過此轉換曲線’屬於暗態範圍3〇ι的畫素將 〆夕晝素灰階值’所以顯示時會變得比未調整前更暗，而 屬^態範圍302的晝素將增加晝素灰階值，所以輸出顯 不4會變得比未調整前更亮，如此能夠加強畫素的明暗對 ，，由於屬於明態的晝素被強化，當背光亮度降低時，在 ^晶顯示屏幕250上所顯示的晝質可以保持原有色彩的鮮u > This hair" light processing system uses the output of the kneading signal and the redundant output for proper brightness adjustment. Therefore, the backlight processing system can be appropriately adjusted with different kneading marks = input. Face 昼 〇 1 配合 配合 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少 减少The above and other objects, features, and advantages of the invention will be apparent from the description of the embodiments of the invention. The adjusted kneading quality is the same as the original kneading quality. In the implementation of the present invention, the brightness of the pixels is compared. In addition, in order to achieve the section; == ; ί 2 Inventive embodiment appropriately adjusts the backlight brightness according to the kneading signal. Referring to FIG. 2, FIG. 2 is a schematic diagram of a backlight processing system according to an embodiment of the present invention. The backlight processing system includes a pixel conversion unit 210, a uniform gray scale analysis unit 22, and a back. The evaluation unit 23 is adjusted. Among them, 8 Ο ο 200822033 WP9511-C400-0574 22549twf.doc/n The average pixel gray analysis unit 220 includes a face information distribution unit 221 and a J face, a determination unit 222, and the above units The handle relationship is as follows, the 昼兀210 is configured to receive the picture signal 'adjust the ash white value according to the kneading signal and transmit it to the liquid crystal display screen 25G for display, the picture information distribution single receiving the 昼 surface signal, the f面 f message distribution list The output of 221 is determined by the judging unit 222, and the output of the kneading information judging unit 222 is connected to the moonlight 5 week. The sweating evaluation unit 230's backlight adjustment evaluation unit 23 is connected to the backlight module, and then , Langben invention embodiment. Please refer to Figure 3, Figure 3 shows the gray scale mapping (four) of the input element of the pixel conversion unit 21〇. There are two lines in Figure 3 ··solid disk , line, solid line means that no gray level value change is made, that is, the f value of the input element is equal to the gray level value of the output element, and the dotted line county embodiment of the invention =, the conversion curve is used, and the signal position is used ( Red, green, blue) converted into letter j G B', through The conversion curve 'belongs to the dark state range 3 〇 ι 的 的 的 的 的 的 ' ' ' ' ' ' ' ' ' ' ' 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以 所以Value, so the output display 4 will become brighter than before the unadjusted, so that the bright and dark pairs of pixels can be enhanced. Since the pixels belonging to the explicit state are strengthened, when the brightness of the backlight is lowered, on the crystal display screen 250. The enamel shown can keep the original color fresh
SmL十生〇 、上述圖3的轉換曲線也可以有數種不同的表現方式， 以下列出三種表示方式，當知本發明並不受限於此。 (1) ^ f(x) = 255 (當 X > a 時）； 9 200822033 WP9511-C400-0574 22549twf.doc/n f(x)二[255 / (a-x)] * x (當 x 分時）。 (2) f(X)二 0 (當 乂<8時）； f(x)二[255 / (255-a)] * (x_a)(當 x >二 a 時）。 (3) f(x)二 0 (當 X <= a 時）； f(x)二 255 (當 x>=b 時）； f(x)二[255 / (b-a)] * (X—a)(當 a < X < b 時）。 X為輸入彳§號之灰階值，f(x)為輸出信號之灰階值，a 與b為兩個灰階茶考值。 為將本實施例之背光處理系統2 〇 〇實現於中小尺寸電 子顯不裝置’更可將圖3之轉換曲線的輸入晝素與輸出晝 素灰階值關係整合至查表（l〇〇k_uptable)内，以更降低設 計複雜度。 请參照圖4 ’圖4繪示本發明實施例之輸入畫素灰階The conversion curve of SmL and the above-mentioned FIG. 3 can also have several different expressions. Three representations are listed below, and it is to be understood that the invention is not limited thereto. (1) ^ f(x) = 255 (when X >a); 9 200822033 WP9511-C400-0574 22549twf.doc/nf(x) two [255 / (ax)] * x (when x minutes) . (2) f(X) two 0 (when 乂 <8); f(x) two [255 / (255-a)] * (x_a) (when x > two a). (3) f(x) two 0 (when X <= a); f(x) two 255 (when x>=b); f(x) two [255 / (ba)] * (X— a) (when a < X < b). X is the grayscale value of the input 彳§, f(x) is the grayscale value of the output signal, and a and b are the two grayscale tea values. In order to realize the backlight processing system 2 of the embodiment in the small and medium size electronic display device, the input pixel of the conversion curve of FIG. 3 and the output pixel gray scale value relationship can be integrated into the look-up table (l〇〇k_uptable). ) to reduce design complexity. Referring to FIG. 4, FIG. 4 illustrates an input pixel gray scale according to an embodiment of the present invention.
U 值RGB與輸出畫素灰階值R，G，B，之查表，運用内插運算 外插運异’其他類似的演算法），可得到所有輸出畫素 口 =值另外，晝素轉換單元21〇所使用轉換曲線不一定 <木根據不同靜態或動態景多像類型而可運用不同的 轉換曲線。 各判素^階分析單& 220能夠對於晝面資訊進行適 ΐ面二麥考圖5⑻與圖5(b) ’其緣示為—張完整 ^的火卩自值與晝素分佈數量的關係圖。 圖5⑻與圖5(b)中之灰階值代表各晝素中之最大灰階 200822033 WP9511-C400-0574 22549twf.doc/n 值’以’ ~個晝素^般包括^個紅綠監子晝素為例，某* 個 晝素的灰階值(紅，綠，藍）= (80，150，180)，則此晝素的 最大灰階值為180，且晝面資訊分佈單元221將一張晝面 之所有晝素的最大灰階值取出，可得到每一灰階值的晝素 分佈數量，如圖5(a)，比如，晝面信號解析度為32〇*24〇 的圖像，則會得到(320*240)個最大灰階值。 根據圖5(a)，晝面資訊判斷單元222接收來自晝面資 訊分佈單元221的灰階值對畫素分佈數量的關係資料，並 進行分析判斷，如圖5(b)由高灰階值向低灰階值的方向進 行晝素分佈數量的累加計算，當累加結果大於或等於此張 晝面總畫素數目之N% (N為正值）時，所對應的灰階值 當作麥考信號APGL並輸出，在圖5(b)中，若n = 25，而 APGL比如為180，且平均晝素灰階分析單元22〇根據上 述方法提供麥考信號APGL至背光調整評估單元23〇，背 光調整評估單元230再根據參考信號ApGL作背光亮度調 整。 另外，圖5(b)的方法，晝面資訊判斷單元222也可以 由，方向做累加運算，亦即，從低灰階值向高灰階值方向 進仃累加運算，若累加結果大於或等於（刚_N) %時，則 將所對應的紐值當作參考錢ApGL之值，紐，平均 灰卩自刀析單兀22〇輸出參考信號ApGL至背光調整評 估早元230。 月光凋正。平估單元230根據參考信號ApGL來進行亮 又调整，背光調整評估單元23〇根據參考信號ApGL來產 11 200822033 WP9511-C400-0574 22549twf.doc/n 生背光調整值BackDim，以控制背光模組240的亮度，比 如，當背光調整值BackDim為1時，表示背光模組240的 受度袁免，當背光調整值BackDim為0時，表示背光模組 240的亮度最暗。 假設背光調整評估單元230更利用參數P、Q、Mb與 Nb來輸出背光調整值BackDim，其中0< Q< P< 255，且 0<Mb<Nb<l，背光調整值BackDim可表示如下：U value RGB and output pixel gray scale values R, G, B, look up the table, use interpolation to extrapolate the different 'other similar algorithms', you can get all the output pixels = value, in addition, the pixel conversion The conversion curve used by unit 21〇 is not necessarily < wood can use different conversion curves according to different static or dynamic scene multi-image types. Each of the numeracy analysis tables & 220 can perform the appropriate information on the face information, the second wheat test 5(8) and the figure 5(b), and the relationship between the two is the same as the number of the fire. relation chart. The gray scale values in Fig. 5(8) and Fig. 5(b) represent the largest gray scale in each element. 200822033 WP9511-C400-0574 22549twf.doc/n value 'to' ~ 昼素^^^^^^ For example, if the gray scale value (red, green, blue) of a certain pixel is (80, 150, 180), the maximum grayscale value of the pixel is 180, and the face information distribution unit 221 will The maximum grayscale value of all the pixels of a facet is taken out, and the number of the pixel distribution of each grayscale value is obtained, as shown in Fig. 5(a). For example, the resolution of the facet signal is 32〇*24〇. Like, you get (320 * 240) maximum grayscale values. According to FIG. 5( a ), the facet information judging unit 222 receives the relationship data of the gray scale value and the number of pixel distributions from the kneading information distribution unit 221, and performs analysis and judgment, as shown in FIG. 5( b ) by the high gray scale value. The cumulative calculation of the number of pixel distributions in the direction of the low grayscale value. When the cumulative result is greater than or equal to N% of the total number of pixels in the facet (N is a positive value), the corresponding grayscale value is regarded as wheat. The signal APGL is output and output. In FIG. 5(b), if n=25 and the APGL is 180, and the average pixel grayscale analyzing unit 22 provides the McCaw signal APGL to the backlight adjustment evaluation unit 23 according to the above method. The backlight adjustment evaluation unit 230 further performs backlight brightness adjustment according to the reference signal ApGL. In addition, in the method of FIG. 5(b), the face information determining unit 222 may perform an accumulation operation by the direction, that is, an accumulation operation from a low gray level value to a high gray level value, if the accumulated result is greater than or equal to (just _N) %, the corresponding value is taken as the value of the reference money ApGL, New Zealand, the average gray 卩 卩 兀 〇 22 〇 output reference signal ApGL to backlight adjustment evaluation early 230. The moonlight is withered. The flat evaluation unit 230 performs light adjustment according to the reference signal ApGL, and the backlight adjustment evaluation unit 23 generates a backlight adjustment value BackDim according to the reference signal ApGL to control the backlight module 240. The brightness of the backlight module 240 is the darkest when the backlight adjustment value BackDim is 0, for example, when the backlight adjustment value BackDim is 1. It is assumed that the backlight adjustment evaluation unit 230 further outputs the backlight adjustment value BackDim by using the parameters P, Q, Mb and Nb, where 0 < Q < P < 255, and 0 < Mb < Nb < l, the backlight adjustment value BackDim can be expressed as follows:
BackDim 二 APGL / 255 (當 P<APGL <=255); BackDim = Mb (當 Q< APGL<= P);BackDim II APGL / 255 (when P<APGL <=255); BackDim = Mb (when Q<APGL<=P);
BackDim = Nb (當 0<= APGL<= Q)。 上述參數比如為Mb= 0·7，Nb= 0·9，120與 180，0為下限值，255為上限值。當參考信號APGL之值 介於0〜120，代表輸入晝面信號201屬於偏暗，所以將背 光調整值BackDim設成0·9，以避免背光亮度降太多會讓 人感覺影像太暗。 同樣，當參考信號APGL之值介於120〜180，代表背 光亮度要多降一些，所以背光調整值BackDim設成0.7， 另外，當參考信號APGL之值介於180〜255，背光調整值BackDim = Nb (when 0 <= APGL<= Q). The above parameters are, for example, Mb = 0·7, Nb = 0·9, 120 and 180, 0 is the lower limit value, and 255 is the upper limit value. When the value of the reference signal APGL is between 0 and 120, it means that the input pupil signal 201 is dark, so the backlight adjustment value BackDim is set to 0·9 to avoid too much backlight brightness degradation, which makes the image feel too dark. Similarly, when the value of the reference signal APGL is between 120 and 180, it means that the brightness of the backlight is lowered a little, so the backlight adjustment value BackDim is set to 0.7. In addition, when the value of the reference signal APGL is between 180 and 255, the backlight adjustment value is
BackDim 為 APGL/255。 值得一提的是，上述本發明實施例的參數設定值並不 限所假設之值，可以依所搭配使用的背光模組240與液晶 顯不屏幕250，來選擇最佳組合的參數設定；或者在不同 應用環境或不同影像模式做各種設定，以適當的演算方式 與麥數，來進行背光亮度調整。 12 200822033 WP9511-C400-0574 22549twf.doc/n 請蒼關6⑷，圖6⑻緣示本發明另一實施例之背光 處理方法流程圖。背光處理方法如下，如步驟麗，接收 畫面信號後’如步驟S6G2，調整晝面信號，且步驟_ 之轉換例如根據-查表來調整此晝面信號之晝素灰階值， 當晝面#號之晝素屬於如圖3之暗態範圍遍的晝素時， 減少晝素灰階值；或者當畫面信號之晝素屬於如圖3之明 態範圍302的晝素時，增加晝素灰階值，再如步驟剛， n 根據晝面信號之晝素灰階分佈情形，輪出參考信號，接者 如”，接收此參考信號來進行背光調整，以調整光 源之背光亮度’再依㈣，根據光狀背光亮度，顯 不轉換後的晝面信號。 請參閱圖6(b)，緣示步驟S6〇3的詳細内容，上述步 驟S603還包括下列步驟，如步驟S6〇3a，取出此晝面信號 中之每一晝素之最大灰階值，計算每-灰階值的-晝素分 佈數量，以得敝階值與晝素分佈數量的_資料(如圖 、 元所示）’再；如步驟S603b，對此關係資料之畫素分佈數量 進行累加计异(如圖5b所示），且步驟S603c，當累加結果 大於或等於晝面信號之圖像總晝素的一比例數量時，則將 所對應的灰階值當作參考信號。 根據上述實施例的說明可知，在本實施例中，背光處 理系統會根據輸入晝面信號之晝素灰階值來調整晝素亮 度、分析晝面亮暗、計算及調整背光亮度等程序，對於不 同輸入晝面信號會有不同的背光調整，且將畫面信號適當 調整以得到適當的畫質，如此一來，使用者觀看影像時了 13 200822033 WP9511-C400-0574 22549twf.doc/n 地，：背S i 示對比亦可獲得提昇，而適度 ^ =二度具有省電功用，因此本實施例可以實施於 體Ϊ路:示裝置，也可以將背光處理系統嵌入於積BackDim is APGL/255. It is to be noted that the parameter setting value of the embodiment of the present invention is not limited to the assumed value, and the optimal combination parameter setting may be selected according to the backlight module 240 and the liquid crystal display screen 250 used together; or Make various settings in different application environments or different image modes, and adjust the backlight brightness with appropriate calculation method and wheat number. 12 200822033 WP9511-C400-0574 22549twf.doc/n Please turn off 6(4), and Fig. 6(8) shows a flow chart of the backlight processing method according to another embodiment of the present invention. The backlight processing method is as follows, such as step 丽, after receiving the picture signal, as in step S6G2, adjusting the face signal, and the step _ is converted, for example, according to the look-up table to adjust the pixel gray value of the face signal, when the face# When the genus of the genus belongs to the morpheme of the dark state range of Fig. 3, the gradation value of the gradation is reduced; or when the morpheme of the picture signal belongs to the morpheme of the range 302 of Fig. 3, the ash is increased. The order value, and then as the step just, n according to the gray scale distribution of the pupil signal, the reference signal is rotated, and the receiver is like ", receiving this reference signal for backlight adjustment to adjust the backlight brightness of the light source" (4) According to the brightness of the light backlight, the converted kneading signal is displayed. Referring to FIG. 6(b), the details of step S6〇3 are shown. The above step S603 further includes the following steps, such as step S6〇3a, The maximum gray scale value of each element in the kneading signal, and the number of the - 昼 分布 distribution of each ash scale value is calculated to obtain the _ data of the 敝 order value and the number of 昼 分布 distribution (as shown in the figure and the element) Again; as in step S603b, the number of pixel distributions of the relationship data The row is incremented (as shown in FIG. 5b), and in step S603c, when the accumulated result is greater than or equal to a proportional number of the total pixels of the image of the kneading signal, the corresponding grayscale value is taken as the reference signal. According to the description of the above embodiment, in the embodiment, the backlight processing system adjusts the brightness of the pixel according to the gray scale value of the input pupil signal, analyzes the brightness of the surface, calculates and adjusts the brightness of the backlight, and the like. Different input kneading signals will have different backlight adjustments, and the picture signal will be properly adjusted to get the appropriate picture quality, so that when the user views the image, 13 200822033 WP9511-C400-0574 22549twf.doc/n ground,: The back S i shows that the contrast can also be improved, and the moderate ^=2 degree has the power saving function. Therefore, the embodiment can be implemented in the body circuit: the display device, and the backlight processing system can also be embedded in the product.
雖然本發明已以實施例揭露如上，然其並非用以 本發明，任何所屬技術領域中具有通常知識者，在不脫離 本發明之精神和範圍内，#可作些許之更動與潤飾， 本發明之保護範圍當視後附之申請專利範圍所界定者為 【圖式簡單說明】 圖1為習知之背光處理系統架構圖。 圖2為本發明一實施例之背光處理系統架構圖。 圖3為圖2之晝素轉換單元21〇的輸入晝素與輸出晝 素之灰階映射關係圖。 | 圖4為圖2之晝素轉換單元21〇之輸入晝素與輸出書 素灰階值之查表。 〜 圖5(a)為灰階值與晝素分佈數量關係圖。 圖5(b)為從圖5(a)中計算參考信號之方法示意圖。 圖6(a)為本發明另一實施例之背光處理方法流程圖。 圖6(b)為本發明實施例之背光處理步驟S6〇3的詳細 流程圖。 【主要元件符號說明】 11、 25〇 ·液晶顯示屏幕 12、 240 :背光模組 14 200822033 WP9511-C400-0574 22549twf.doc/n 13 :背光控制單元 14 :顯示控制單元 15 :平均亮度偵測單元 16 :最高偵測單元 200 ··背光處理系統 201 :晝面信號 210 :晝素轉換單元 220 :平均畫素灰階分析單元 221 ··晝面資訊分佈單元 222 :畫面資訊判斷單元 230 :背光調整評估單元 301 :暗態範圍 302 ··明態範圍 APGL :參考信號 AVE :平均信號 PEK :最高信號 S601〜S605、S603a〜S603c :方法之步驟 15Although the present invention has been disclosed in the above embodiments, it is not intended to be used in the present invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is defined by the scope of the appended patent application. [Simplified description of the drawings] FIG. 1 is a schematic diagram of a conventional backlight processing system. 2 is a structural diagram of a backlight processing system according to an embodiment of the present invention. Fig. 3 is a diagram showing the gray scale mapping relationship between the input elements and the output elements of the pixel conversion unit 21A of Fig. 2. 4 is a look-up table of input pixel and output book gray scale values of the pixel conversion unit 21 of FIG. ~ Figure 5(a) is a graph showing the relationship between the grayscale value and the number of halogen distributions. Figure 5(b) is a schematic diagram of a method of calculating a reference signal from Figure 5(a). FIG. 6(a) is a flowchart of a backlight processing method according to another embodiment of the present invention. Fig. 6(b) is a detailed flowchart of the backlight processing step S6〇3 according to the embodiment of the present invention. [Description of main component symbols] 11, 25〇·Liquid crystal display screen 12, 240: Backlight module 14 200822033 WP9511-C400-0574 22549twf.doc/n 13 : Backlight control unit 14 : Display control unit 15 : Average brightness detection unit 16: highest detection unit 200 · backlight processing system 201: kneading signal 210: pixel conversion unit 220: average pixel gray level analysis unit 221 · · face information distribution unit 222: picture information determination unit 230: backlight adjustment Evaluation unit 301: dark state range 302 · bright state range APGL: reference signal AVE: average signal PEK: highest signal S601~S605, S603a~S603c: step 15 of the method