1344121 Λ 九、發明說明： * 【發明所屬之技術領域】 本發明係有關一種顯示面板之背光亮度調整裝置及方 法’特別是一種修正影像訊號及調整合適的背光亮度之裝置及 方法。 【先前技術】 顯示面板常有漏光之現象，使得影像上之暗區域（或稱為 黑畫面）因為漏光而不夠暗（黑），藉由影像所呈現之灰階調整背 光之亮度，進而提高影像之對比。 運用在薄膜電晶體顯示面板之相關技術，係利用連續之前 ， 圖框之影像说说調整後圖框之背光亮度以加強後圖框之影像 汛號之對比，其調整方法係透過前圖框之影像訊號之輝度累積 分佈之曲線區分不同的區域’對不同的區域計算出背光調整幅 度，並用於後圖框，此方法之背光調整非基於同圖框之影像訊 號，如果二連續之圖框之影像訊號之輝度累積分佈類似，則此 方法可適用，若二圖框之輝度累積分佈差異大時，則會失真， 且並未解決漏光的問題。 第1圖所示為習知技術之背光亮度控制裝置架構示音 圖，時序控制器10接收影像之訊號並利用其色彩資料由工作 控制器11計算出工作率（duty rate)訊號，電阻電容迴路20連 接於時序控制器ίο，利用工作率訊號換算出工作電壓（duty voltage)傳送給反相器30 ’並藉由電壓電流對應關係而限制工 作電流，以控制光源40之亮度，本技術係利用類比調節之方 ，式，但未解決漏光所造成的黑畫面太亮的問題，影像資料亦未 調整，對比效果的增益有限。 5 1344121 立第2圖所不為另一習知技術之背光亮度控制裝置架構示 思圖。輸入訊號由特徵值傾測模組50計算出三個特徵值分別 為最大亮度電位準(max)、平均亮度電壓位準㈣)及最小亮 度電垄位準(—，控制資料產錢組⑽連接特徵值伯測模組° 5〇依據動癌電墨範圍（Dynamical尺傳)及最大亮度與最小亮 度之電壓位準差之比計算出其增益係數(gain)，@定平均亮度 電壓位準，將最小亮度位準以增益餘放大，所產生之最 小亮度電壓與動態電壓範圍之最小值之差為位移電壓 (offset)，將增益係數及位移電壓傳給訊號調整模組7〇，其中 訊號強度調整模組71接收增益係數將影像資料放大，訊號位 準調整模組72接收位移電壓，訊號強度調整模組71將放大之 〜像資料傳給gf^號位準調整模組72並調整電壓位準使最小亮 度電壓位準對應之電壓位準同動態電壓範圍之最小值再使^ 均焭度電壓位準所對應之電壓位準乘以調整因數回到原始之 平均亮度電壓位準，利用此調整係數線性修改影像訊號並傳給 被動光源調節模組90，增益係數與調整因數之比即為淨增益 係數，利用此增效調整光源控制模組8〇，可知此技術利用線 性的方式調整輸入影像訊號，並利用淨增益係數調整背光亮 度，但對最大茺度與最小亮度之電壓位準為動態電壓範圍並無 調整效果。 一般影像訊號背光亮度調整裝置主要係調整輸入影像訊 號及调整背光亮度以加強其對比效果，然而線性調整方式或利 用前一圖框為基準的影像調整方式並無法得到最佳影像品 質，因此，利用影像訊號調整背光的技術仍為目前研究發展之 重要的課題。 6 13441211344121 发明 、 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 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 ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ [Prior Art] The display panel often has light leakage, so that the dark area (or black picture) on the image is not dark (black) due to light leakage, and the brightness of the backlight is adjusted by the gray level of the image to improve the image. The contrast. The related technology used in the thin film transistor display panel is to use the image of the frame before the continuous image frame to adjust the brightness of the backlight of the frame to enhance the contrast of the image frame of the back frame. The adjustment method is through the front frame. The curve of the cumulative distribution of luminance of the image signal distinguishes different regions'. The backlight adjustment amplitude is calculated for different regions and used for the rear frame. The backlight adjustment of this method is not based on the image signal of the same frame, if two consecutive frames The cumulative distribution of the luminance of the image signal is similar. This method is applicable. If the difference in the cumulative distribution of the luminance of the two frames is large, the distortion will occur and the problem of light leakage is not solved. FIG. 1 is a schematic diagram showing the structure of the backlight brightness control device of the prior art. The timing controller 10 receives the image signal and uses the color data to calculate the duty rate signal from the work controller 11, and the resistor-capacitor circuit. 20 is connected to the timing controller ίο, and uses the duty ratio signal to convert the duty voltage to the inverter 30' and limits the operating current by the voltage-current correspondence to control the brightness of the light source 40. The present technology utilizes Analogy adjusts the formula, but does not solve the problem that the black picture caused by light leakage is too bright, the image data is not adjusted, and the gain of the contrast effect is limited. 5 1344121 Figure 2 is not a schematic diagram of the backlight brightness control device architecture of another conventional technology. The input signal is calculated by the eigenvalue tilting module 50 to calculate three characteristic values: maximum brightness potential level (max), average brightness voltage level (four), and minimum brightness electric ridge level (-, control data production group (10) connection The characteristic value test module ° 5 计算 according to the cancer cell range (Dynamical ruler) and the ratio of the maximum brightness to the minimum brightness voltage level difference calculated its gain coefficient (gain), @ set the average brightness voltage level, The minimum brightness level is amplified by the gain, and the difference between the minimum brightness voltage and the minimum value of the dynamic voltage range is the offset voltage, and the gain coefficient and the displacement voltage are transmitted to the signal adjustment module 7〇, where the signal strength The adjustment module 71 receives the gain coefficient to amplify the image data, and the signal level adjustment module 72 receives the displacement voltage, and the signal intensity adjustment module 71 transmits the amplified image data to the gf^ level adjustment module 72 and adjusts the voltage level. The voltage level corresponding to the minimum brightness voltage level is the same as the minimum value of the dynamic voltage range, and then the voltage level corresponding to the voltage level of the uniformity is multiplied by the adjustment factor to return to the original average brightness voltage. Precisely, the image signal is linearly modified by the adjustment coefficient and transmitted to the passive light source adjustment module 90. The ratio of the gain coefficient to the adjustment factor is the net gain coefficient. With this synergistic adjustment of the light source control module 8〇, it is known that the technology utilizes linearity. The method of adjusting the input image signal and adjusting the brightness of the backlight by using the net gain coefficient, but the voltage level of the maximum brightness and the minimum brightness has no adjustment effect on the dynamic voltage range. The general image signal backlight brightness adjusting device mainly adjusts the input image signal. And adjust the brightness of the backlight to enhance the contrast effect. However, the linear adjustment method or the image adjustment method using the previous frame as the reference does not achieve the best image quality. Therefore, the technique of adjusting the backlight using the image signal is still important for the current research and development. Question. 6 1344121
【發明内容】 入影像訊 本發明之一目的係利用指數調整方式調整 號，增加其對比效果。 j 本發明之另-目的係利用輸人影像訊號號決定其背光亮 度，降低背光源漏光影響其黑畫面之品質。 、 裝置為其了包達^述目的，本發明提供—種影像訊號背光亮度控制SUMMARY OF THE INVENTION One of the objects of the present invention is to use an index adjustment method to adjust the number and increase the contrast effect. j Another object of the present invention is to determine the backlight brightness by using the input image signal number, and to reduce the light leakage of the backlight to affect the quality of the black picture. The device provides a package for the purpose of the description, and the invention provides a brightness control of the image signal backlight
一分析模組，接收一圖框影像訊號，擷取—特徵輝户· 輝度了儲存模組，連接於該分析模組，儲存該圖框影像;號及該特徵 策模組，連觀分減組，歸麵_度建立__影像赠 轉換方式及一背光控制訊號； & 一增效模組，連接該儲存模組及該絲模組 換方式將該圖框影像訊號轉換為-輸出影像訊號；及據^像喊轉An analysis module receives a frame image signal, captures a feature, and displays a storage module, and is connected to the analysis module to store the image of the frame; the number and the feature policy module Group, reversion _ degree establishment __ image gift conversion mode and a backlight control signal; & a synergy module, connected to the storage module and the wire module change mode to convert the frame image signal into an output image Signal; and according to ^ like shouting
财衝2紐繼組’連接該絲歡，依據該背紐舰號產生一 脈衝寬度瓣訊號，用關整背光亮度。 列步ΐ外’本發明之提供—種影像訊«光亮度控制方法，其包括下 立寺徵輝度’該分析模組接收一圖框影像輸入訊號，建 度，二讓輝度分佈取，例所對應之輝 所傳ί存該圖框影像輸人訊號’該儲存模組儲存由該分析模組 之該圖框影像輸入訊號； ' ' 策模級t一影像輸入輸出對應表及—水平脈衝之關閉數量，該決 出對^該分析模組所傳人之該特徵輝度建立該影像輪入輸 Μ應表及該水平脈衝關之義數4 ; 刊入物 7 1344121Cai Chong 2 New Relay Group' connects the silk fan, and generates a pulse width valve signal according to the back-ship number to close the backlight brightness. In addition to the present invention, the invention provides a method for controlling the brightness of the image, which includes the brightness of the lower standing temple. The analysis module receives a frame image input signal, the degree of construction, and the distribution of the luminance. Corresponding to the hui, the image input signal of the frame is stored. The storage module stores the image input signal of the frame by the analysis module; ' ' the mode-level t-image input/output correspondence table and the horizontal pulse Turning off the quantity, the decision is made to the characteristic brightness of the person transmitted by the analysis module to establish the image wheel input and output table and the horizontal pulse number of the number 4; publication 7 1344121
轉出輸出影像訊號，利用該增效模組儲存該決策模組 二之該影像輸人輸出對應表’將該健存模組所傳人之圖框影像 輸入矾號轉為影像輸出訊號；及 輸出背光控制訊號，該背光控制模組由該決策模組所 該，平脈衝關之關數量計算出該脈衝寬度調節訊號之關閉時間， 並在同-圖框中以開關-次以上之方式完成該脈衝寬度調節訊號。 本發明係利關枢之影像訊號，取輝度累積分佈函數之—定分 比例’通常取值在0.5〜1之間，其方式：Transferring the output image signal, and using the synergistic module to store the image input output corresponding table of the decision module 2, converting the image input nickname of the image transmitted by the health module into an image output signal; and outputting a backlight control signal, wherein the backlight control module calculates the turn-off time of the pulse width adjustment signal by the number of the flat pulse off, and completes the switch in the same-frame by the switch-time or more Pulse width adjustment signal. The invention is directed to the image signal of Li Guanshu, and the ratio of the concentration distribution of the luminance cumulative distribution function is usually between 0.5 and 1, in a manner of:
、利用才a數方式調影像訊號使對比較接近人類之視覺感官。 二、降低背光亮度-降低漏轴黑畫面之影響，連帶降低背光之 電力消耗。 【實施方式】 第3圖所示為本發明一實施例影像訊號背光亮度控制裝置 之系統架構示意圖。於本實施例中，分析模組丨丨〇接收一圖 框影像輸入sfl號，擁取其特徵輝度(Dmax),將特徵輝度傳輸 給決策模組120,並將輸入影像訊號（Din)傳輸給儲存模組 130儲存起來，決策模組12〇依據特徵輝度計算出影像輸入 輸出對應表（lookup table，LUT)及背光控制訊號（backlight luminance control，BLC) ’光源控制模組15〇連接決策模組12〇 並接收背光控制訊號轉化脈衝寬度調節訊號（pulse width modulation，PWM)控制背光亮度，增效模組ι4〇連接決策模 組120接收影像輸入輸出對應表及儲存模組13〇接收輸入影 像訊號，透過影像輸入輸出對應表調整為輸出影像訊號。 接續上述說明，於本實施例中，分析模組丨1 〇接收影像 輸入訊號得出第4圖所示之輝度分佈圖111，表示不同輝度時的像 g 點數量分觸，本實施例中最小輝度為U最大輝5 度之斜線部分面積統計㈣5圖所示之像點輝度分n 示在某—輝度以下賴有像點數量，為說明枝已將輝度Γ積^^ m作正規化（n〇nnallzatlon)之處理，第4圖式中所示之特 Dmax以下之面積對應到第5圖輝度累積分佈圖ιΐ2之一定 1 -定比例介於min及丨之間，即分別對顧輝度124及最 况），為說日厳細种假設此—祕!社％，簡應之特^ 整本M _此特徵輝度為Dmax作為影像訊號調 首先說明影像訊號之修正，為符合人類視覺感官採 指數方式修正影像資料，其修正方式為The use of a number to adjust the image signal makes the pair closer to human visual sense. Second, reduce the brightness of the backlight - reduce the impact of the leaky black screen, and reduce the power consumption of the backlight. Embodiment 3 FIG. 3 is a schematic diagram showing the system architecture of an image signal backlight brightness control device according to an embodiment of the present invention. In this embodiment, the analysis module receives a frame image input sfl number, captures its feature luminance (Dmax), transmits the feature luminance to the decision module 120, and transmits the input image signal (Din) to The storage module 130 is stored, and the decision module 12 calculates a video input/output correspondence table (LUT) and a backlight luminance control (BLC) according to the feature luminance. The light source control module 15 is connected to the decision module. 12〇 and receiving backlight control signal conversion pulse width adjustment signal (pulse width modulation (PWM) control backlight brightness, synergy module ι4〇 connection decision module 120 receiving image input and output correspondence table and storage module 13 〇 receiving input image signal The image input/output correspondence table is adjusted to output an image signal. Following the above description, in the embodiment, the analysis module 丨1 〇 receives the image input signal to obtain the luminance distribution map 111 shown in FIG. 4, which indicates that the number of g points in different luminances is different, which is the smallest in this embodiment. The luminance is the U-maximum radiance of 5 degrees. The area of the slash is statistically calculated. (4) The luminosity of the illuminance is shown in Figure 5. The number of pixels is shown below the certain luminance. In order to explain that the luminance has been normalized by the branch (n) 〇nnallzatlon), the area below the special Dmax shown in Fig. 4 corresponds to the certain 1st ratio of the cumulative distribution map ιΐ2 of Fig. 5, which is between min and ,, that is, respectively In the most case, it is assumed that this is the secret of the sacred sacred sect. The singularity of the singularity of the singularity of the singularity of the singularity of the singularity Way to correct the image data, the correction method is
Dout = 255 X (Din/Dmax) ^ (Dmax/255)⑴ 其中Din為影像輸入訊號，Dmax為特徵輝度及D〇ut為 輸出影像訊號。Dmax=200，當Din=200其輸出D〇ut=255， 當Din > 200時的亮度被下修，但其影響不大（最多5%)，其 對比效果仍然比為修正前增效大，補後再說明。 第6圖為實施例中之影像訊號輸入_輸出對應關係圖ΐ2ι，圖 令說明特徵輝度Dmax介於124〜255間’當Din > Dmax皆被修正為 Dout=255(最大輝度），不同的Dmax具有不同的修正曲線。 再來說明背光亮度之修正，面板係透過高頻率之水平脈衝掃 描面板，例如一個解析度1366X768之面板，其水平脈衝數量至少為 768個’關閉水平脈衝數量即可降低亮度，利用一脈衝宽度調節訊號 關閉水平脈衝，如此便可透過控制脈衝寬度調節訊號而適度調節背光 亮度。 圖框中的水平脈衝數量對應到不同背光亮度，控制圖框中的水平 脈衝數董關閉數量即可控制亮度。第7圖為特徵輝度_水平脈衝關閉 9 (HSYNCOFF)數量對應關係圖122，說明當特徵輝度〇職所對應一 背光亮度，透過關閉水平脈賊量使最大亮度為此對應之亮度，並將 Dmax調整為255(最大輝度），例如實施例中之對應關係為當 Dmax=192時’水平脈衝關閉數量=199，而當Dmax=2〇〇時為182， 將脈衝寬度調節訊號之關閉的寬度設定為丨82即可。一般在一個圖框 中會以-:欠社的方式絲脈衝寬度_截，掃描鮮為6〇HZ， 於圖框中關兩次，那脈衝寬度調節訊號之頻率為】2DHZ，不會被人 類眼睛查覺。 接下來說明整個調整效果’為說明方便假設最高灰階MS所對應 之最大亮度為585而最低輝度〇所對應之最小亮度為u，而特徵輝 度DmaX=20〇之對應之亮度為49s，若當最大亮度為495時，最小亮 度為0.93。 第8圖為輝度最大亮度對應關係圖，其中特徵輝度-背光亮度關 係圖113 ’圖中輸入影像資料之特徵輝度Dmax對應背光最大亮度， 透過影像磁背光②度控繼置之娜，得到輸出輝度背光亮度關係 圖14卜圖中將背光最大亮度調整為495，輸入影像訊號將D臟修 正為255 ’此時最低輝度對應之亮度為㈣，黑畫面所對應之亮度由 1.1調整為G.93 ’有效的降低漏光造成黑畫面不夠黑的情況。 說明對比之效果，面板對比定義為白畫面之亮度與黑畫面亮度 比’實施射未調整前為585/1.1=531錢過影像峨背光亮度控制 裝置之調整修改為585/0.93=629 ’採取累積輝度分佈之一定也例，如 實施例中擁G.95 ’雖然可能犧牲〇 Q5之比例的影像有下修的情況， 但其對比效果仍航祕正纽果大，糾若採取太低_例會造成 影像訊號失真，本實蘭採用0 95可明顯增加對比效果使黑畫面更 黑。 第9圖為影像訊號背光亮度控制方法之一實施例流程 圖，一是調整圖框之影像，此發明採用指數修正方式符合人 ，利用脈衝寬度調節訊號調 衝㈣比^ 脈衝寬度調㈣之狀態為關閉時，水平脈 步驟配:第由水平脈衝訊號之狀態決定，其 圖之裝置結構示意圖說明如下： 像輪=0:二=广分析模組__之影 累積6十數輝度分佈次數建立累積輝声八蚀；^ 輝度輝度分佈之—定比例並將所對應之輝“刀為特徵 彳异衫像輸入輸出對應表’決策模組12〇 據由分析模組m所傳入之特徵輝度，利用修正方 ^ 出所有輸入輝度(Din)之輪出輝度(D〇ut)並s立 對應表傳給增效模組14〇。 了應表將 步驟222:計算水平脈衝之關閉數量，決策模組12〇包含—輝 度水平脈衝關閉對應表’由分析模組11〇所傳入之特徵輝度對應 輝度水平脈細閉對應表，取得水平脈衝關之關閉數量並傳給光 源控制模組150。 ° 步驟230:儲存圖框影像輸入訊號，儲存模組13〇儲存 由分析模組110所傳入之該圖框影像輸入訊號，再傳給增效 模組140。 步驟240:轉出輸出影像訊號，增效模組14〇儲存決策 模組120所傳入之影像輸入輸出對應表，再由儲存模組13〇 接收輸入影像訊號，利用影像輸入輸出對應表輪入將影像訊 號轉為輸出影像訊號； 步驟250:輸出背光控制訊號，背光控制模組15〇由決策模 組110接收水平脈衝關閉數量並計算出該脈衝寬度調節訊號之關閉時 1344121 間’並在同一圖框中以開關一次以上之方式完成該脈衝寬度調節訊 號。 以上所述之實施例僅係為說明本發明之技術思想及特 點，其目的在使熟習此項技藝之人士能夠瞭解本發明之内容 並據以實施，當不能以之限定本發明之專利範圍，即大凡依 本發明所揭示之精神所作之均等變化或修飾，仍應涵蓋在本 發明之專利範圍内。 【圖式簡單說明】 第1圖所示為習知技術之背光亮度控制裝置架構示意圖。 第2圖所示為另一習知技術之背光亮度控制裝置架構示意 圖。 第3圖所示為本發明一實施例影像訊號背光亮度控制裝置之系 統架構示意圖。 第4圖為一實施例之輝度分佈圖 第5圖為一實施例輝度累積分佈圖 第6圖為一實施例之影像訊號輸入輸出對應關係圖。 第7圖為一實施例之特徵輝度水平脈衝關閉數量對應關係圖。 第8圖為一實施例之輝度最大亮度對應關係圖。 第9圖為一實施例之影像訊號背光亮度控制方法之流程圖。 【主要元件符號說明】 10 時序控制器 11 工作控制器 12 1344121Dout = 255 X (Din/Dmax) ^ (Dmax/255)(1) where Din is the image input signal, Dmax is the characteristic luminance and D〇ut is the output image signal. Dmax=200, when Din=200 its output D〇ut=255, when Din > 200 brightness is revised down, but its effect is not big (up to 5%), the contrast effect is still greater than the pre-correction effect After the supplement, explain. Figure 6 is an image signal input_output correspondence diagram ΐ2ι in the embodiment, and the legend indicates that the feature luminance Dmax is between 124 and 255' when Din > Dmax is corrected to Dout=255 (maximum luminance), different Dmax has different correction curves. To illustrate the correction of the backlight brightness, the panel is transmitted through a high-frequency horizontal pulse scanning panel, for example, a panel with a resolution of 1366X768, and the number of horizontal pulses is at least 768. The brightness can be reduced by turning off the horizontal pulse number, and the pulse width is adjusted by using a pulse width. The signal turns off the horizontal pulse, so that the backlight brightness can be adjusted moderately by controlling the pulse width adjustment signal. The number of horizontal pulses in the frame corresponds to different backlight brightness, and the number of horizontal pulses in the control frame can be controlled to control the brightness. Figure 7 is a characteristic luminance _ horizontal pulse off 9 (HSYNCOFF) number correspondence diagram 122, which shows that when the characteristic luminance is corresponding to a backlight brightness, by turning off the horizontal pulse thief, the maximum brightness is the corresponding brightness, and Dmax Adjusted to 255 (maximum luminance), for example, the corresponding relationship in the embodiment is when the Dmax=192 'the number of horizontal pulse off = 199, and when Dmax=2 为 is 182, the width of the pulse width adjustment signal is turned off. For 丨82. Generally, in a frame, the pulse width _ truncation of the wire is _ _ _, the scanning is fresh 6 〇 HZ, and it is turned off twice in the frame, the frequency of the pulse width adjustment signal is 2DHZ, will not be human Eyes are detected. Next, the entire adjustment effect will be described. For the convenience of explanation, it is assumed that the maximum brightness corresponding to the highest gray level MS is 585 and the minimum brightness corresponding to the lowest brightness 〇 is u, and the brightness of the characteristic luminance DmaX=20 为 is 49 s. When the maximum brightness is 495, the minimum brightness is 0.93. Figure 8 is the maximum brightness correspondence diagram of the luminance, wherein the characteristic luminance-backlight brightness relationship map 113' the characteristic luminance Dmax of the input image data corresponds to the maximum brightness of the backlight, and the output luminance is obtained by the image magnetic backlight 2 degree control relay. The brightness of the backlight is shown in Figure 14. The maximum brightness of the backlight is adjusted to 495, and the input image signal is corrected to D 255. The brightness corresponding to the lowest brightness is (4), and the brightness corresponding to the black picture is adjusted from 1.1 to G.93. Effectively reduce the leakage of light and cause the black picture to be not black enough. Explain the effect of comparison, the panel contrast is defined as the brightness of the white screen and the brightness ratio of the black screen. Before the implementation of the shot is not adjusted, it is 585/1.1=531 money over the image. The adjustment of the backlight brightness control device is modified to 585/0.93=629 'Accumulate The brightness distribution is also a certain example. For example, in the embodiment, there is a case where the image of G.95' may be sacrificed, and the image of the ratio of 〇Q5 may be repaired. However, the contrast effect is still large, and the correction is too low. The image signal is distorted, and the actual use of 0 95 can significantly increase the contrast effect to make the black picture darker. Figure 9 is a flow chart of an embodiment of the method for controlling the brightness of the image signal backlight. First, the image of the frame is adjusted. The invention adopts the index correction method to conform to the person, and uses the pulse width adjustment signal to adjust the state of the signal (4) to the pulse width (4). In the case of shutdown, the horizontal pulse step is determined by the state of the horizontal pulse signal. The schematic diagram of the device structure is as follows: Image wheel = 0: 2 = wide analysis module __ shadow accumulation 6 tenth degree of luminance distribution establishment Cumulative glow eight eclipse; ^ luminance luminance distribution - the proportion and the corresponding glory "knife is the characteristic 衫 像 like input and output correspondence table" decision module 12 according to the characteristic brightness introduced by the analysis module m The correction method is used to output the luminance (D〇) of all input luminances (Din) and the corresponding table is transmitted to the synergy module 14〇. Step 222: Calculate the number of closed horizontal pulses, decision The module 12 includes a luminance-level pulse-off correspondence table 'the characteristic luminance corresponding to the luminance horizontal pulse close-up correspondence table transmitted by the analysis module 11A, and obtains the closed number of the horizontal pulse off and transmits the closed number to the light source control module 150. Step 230: The frame image input signal is stored, and the storage module 13 stores the frame image input signal transmitted by the analysis module 110, and then transmits the image input signal to the effection module 140. Step 240: Export the output image signal The synergistic module 14 stores the image input and output correspondence table input by the decision module 120, and then receives the input image signal from the storage module 13〇, and converts the image signal into an output image signal by using the image input/output corresponding table wheel Step 250: output a backlight control signal, and the backlight control module 15 receives the horizontal pulse off number by the decision module 110 and calculates the time between the 1344121 when the pulse width adjustment signal is turned off and switches more than once in the same frame. The pulse width adjustment signal is completed in the manner described above. The embodiments described above are merely for explaining the technical idea and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement it according to The scope of the invention is defined by the scope of the invention, that is, the equivalent variations or modifications made by the spirit of the invention should still be covered by the invention. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1 is a schematic diagram showing the structure of a backlight brightness control device of the prior art. Fig. 2 is a schematic view showing the structure of a backlight brightness control device of another conventional technique. A schematic diagram of a system architecture of an image signal backlight brightness control device according to an embodiment of the present invention. FIG. 4 is a luminance distribution diagram of an embodiment. FIG. 5 is an embodiment of a luminance cumulative distribution diagram. FIG. 6 is an image signal input according to an embodiment. Figure 7 is a diagram showing the correspondence relationship between the characteristic luminance horizontal pulse closures of an embodiment. Fig. 8 is a luminance maximum luminance correspondence diagram of an embodiment. FIG. 9 is an image signal backlight luminance of an embodiment. Flow chart of control method [Description of main component symbols] 10 Timing controller 11 Working controller 12 1344121
20 電阻電容迴路 21 電阻 22 電容 40 反相器 42 光源 50 特徵值偵測模組 60 控制資料產生模組 70 訊號調整模組 71 訊號亮度調整模組 72 訊號位準調整模組 80 光源控制模組 90 被動光源調節模組 110 分析模組 120 決策模組 130 儲存模組 140 增效模組 150 光源控制模組 111 輝度分佈圖 112 輝度累積分佈圖 113 特徵輝度··背光亮度關係圖 121 影像訊號輸入-輸出對應關係圖 13 1344121 . 122 特徵輝度-水平脈衝關閉數量對應關係圖 141 輸出輝度背光亮度關係圖 210 步驟 221 步驟 222 步驟 230 步驟 240 步驟 250 步驟 1420 Resistor-capacitor circuit 21 Resistor 22 Capacitor 40 Inverter 42 Light source 50 Characteristic value detection module 60 Control data generation module 70 Signal adjustment module 71 Signal brightness adjustment module 72 Signal level adjustment module 80 Light source control module 90 Passive light source adjustment module 110 Analysis module 120 Decision module 130 Storage module 140 Synergy module 150 Light source control module 111 Brightness distribution map 112 Luminance cumulative distribution map 113 Characteristic luminance · Backlight brightness relationship diagram 121 Image signal input - Output Correspondence Diagram 13 1344121 . 122 Feature Luminance - Horizontal Pulse Closing Number Correlation Diagram 141 Output Luminance Backlight Luminance Relationship Diagram 210 Step 221 Step 222 Step 230 Step 240 Step 250 Step 14