1270045 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種過激驅動一液晶顯示面板之方 法，尤指一種以多階查表方式來過激驅動一液晶顯示面板 的方法。 【先前技術】 一般而言，液晶顯示器具有重量輕、功率消耗少以及低 輻射等等的優點，因此，液晶顯示器已廣泛地應用於市面 上多種可攜式資訊產品，例如筆記蜇電腦以及個人數位助 理（personal digital assistant，PDA)等商品。此外’液晶 螢幕以及液晶電視亦已逐漸普及，取代傳統使用的陰極射 線管顯示器和電視。但是液晶顯示器亦有其缺點。因為液 晶分子特性的限制，在影像資料切換的時候，必須扭轉液 晶分子改變其排列方向，所以會出現晝面延遲的情形。為 了因應影像的快速切換，如何提昇液晶的反應速度日趨重 要。 為了加快像素之液晶分子的偏轉速度，近來過激驅動 (請r drive)方法已被使用在液晶顯示器上，而過激驅動的 作法係將像素的㈣提高麵低，來加大像素於灰階 1270045 轉換時其影像資料值的差距，以加快其液晶分子偏轉的速 度。此外，因為利用過激驅動的方法，其施予像素之資料 電壓可能會與原先預定的資料電壓不相等，故在一般的液 晶顯不器的驅動電路中，通常會設計有一查表元件 (Look_Up Table unit，LUT unit)，藉由前後兩圖框週期的影 像貧料，由一參數表(Look_UpTable，LUT)中查出一過激影 像貧料，以代替原先的影像資料，進而使其資料線驅動電 路產生對應於該過激影像資料之資料電壓，以過激驅動該 液晶顯示面板中的某一像素。 請參考第1圖及第2圖，第丨圖為習知一查表元件1〇 之資料流向圖，第2圖為第丨圖查表元件1〇所使用到的一 麥數表12之示意圖。查表元件10主要的功能係依據一當 時的影像資料De以及-延遲影像資料Dp，從參數表u 中k出對應的過激象資料Dout並加以輸出。參數表 12記錄有複數筆過激影像㈣14，查表元件1()會依據前 後兩圖框週期的影像資料尋找―職、的過激影像資料Μ， 以施加對應的資料線電壓來驅動像素之液晶分子偏轉到適 當角度，進而表現出對應的灰階。查表元件1()記錄了任一 灰階轉換到其他灰階時所需的過激影像#料，其優點是其 精確度較高，但其缺點0料量較大，如以每筆過激= 1270045 14的長度為8位元來推算，用來儲存查表元件10所需的 記憶體容量則為（256x25 6x8x3)位元，亦即196,608位元組。 請參考第3圖及第4圖，第3圖為另一習知查表元件 20之資料流向圖，第4圖為第3圖查表元件20所使用到 的一參數表24之示意圖。與上一習知技術類似地，查表元 件20亦會根據當時的影像資料Dc以及延遲影像資料Dp 來查詢一參數表24以決定出一過激影像資料Dout，較不 同的是，其過激影像資料Dout係一計算單元22依據經查 詢參數表24後所得的一參數值Dref並藉由内差法運算求 得。參數表24記錄有複數筆參數值26，每一參數值26皆 對應於某一灰階範圍的影像資料Dc以及某一灰階範圍的 延遲影像資料Dp，例如參數值D3_2即對應於灰階範圍 16〜23的影像資料Dc以及灰階範圍8〜15的延遲影像資料 Dp。因過激影像資料Dout係計算單元22依據查詢參數表 24所得的參數值Dref而以執行内差運算所得，故其準確度 較低，但相對地其資料量卻較低，如以每筆過激資料26的 長度為16位元來推算，用來儲存查表元件10所需的記憶 體容量則為（32x32x16x3)位元，亦即6，144位元組。 1270045 【發明内容】 因此本發明之目的即在於提供—觀時兼顧參一 料量及精確度之過激驅動液晶顯示面板之方法，^表資 述習知的問題。 以解決上 該方法係用來過激驅動—潘S弓 勒液晶顯不面板。該液 面板包含有減個像素，㈣―像素包含# θ.、'、貝不 及-用來控制該液晶元件之操作的開關元件。該：：件以 含：接收每-像素於每1框週期的影包 資料皆用來控制-對應的像素於—對應的圖期2像 出—對應較階；將所接收相影像㈣延遲内表現 以產生該等像素之延遲的影像資料;建:： 數表，該第H數表包含有排贼—矩階參 階區塊，該矩陣之每—列及每_行的第—階區=個第- 0關，將料—階參數表劃分為至少―货 白非特定區以及至少―第—㈣㈣，而 卓- 特定區之每-第-階區塊皆記錄有至少一對庫階非 考資料；雜該衫《料μ料延遲㈣皆t 疋母—像素於每1框週期的-過激影像資料，其”決、 f任—像素於某1框_的該過激影像資料時，先:據 X像素於4圖框週期的該影像資料以及該像素於前一圖框 l27〇〇45 週期之延遲的影像資料，從該等[階區塊中.一第_ 階參考區塊；若該第一階參考區塊位於呤楚 ^ 亥弟—階非特定區 中，則依據該第-許考區塊所記錄的第__考次 計算出該過激影像資料；以及若該第—階參考㈣ 第-階特定區巾，則減-第二階參數表來計算出該過: 影像資料。 / 【實施方式】 請參考第5圖，第5圖為依據本發明之方法實施的一、夜 晶顯示器30之功能方塊圖。液晶顯示器3〇包含有—液= 面板32、-類比/數位轉換電路34、—訊號接_ % = 緩衝器38、-查表電路40、—時脈控制電路42、—婦 輸出埠44、一資料線驅動電路46 w η . Λ及一掃瞄線驅動電路 48。類比/數位轉換電路34是用來极 ㈣類比影像資料轉換成 數位影像資料，訊號接收埠36則县田十 、彳疋用來將數位的影 y刀別傳送到緩衝器38及查表電路 、十 {私路4〇。緩衝器38會 收到的影像資料延遲一圖框週期德 後，再傳送到杳表 40。查表電路40則會依據當時的旦 一 图士「、田# 的衫像資料以及延遲一 圖框週期後的延遲影像資料Dp， φ ^ 石查詢相關的參數表，以 决疋—過激影像資料D0V。時脈控 刺電路42則是用炎吝& 同步時脈訊號’以控制訊號輸_仏資料線驅動電路46 1270045 以及掃猫線驅動電路48的操作。婦瞄線驅動電路48會依 序地開啟液晶面板32各像素的開關元件，以使資料線驅動 電路46得以將來自訊號輸出埠44的影像輸出訊號D_ 轉換成相對的電壓訊號後，再施加於液晶面板32，進而使 其像素之液晶分子產生偏轉’而表心對應於f彡像輸出訊 號Dout之灰階。 _狹晶面板32之電路圖。 液晶面板32包含有複數條掃崎％、複數條純線 及複數個像素96。每—像素96連接於—對應的掃瞒線％ 以及-對應的㈣線94，且每—像素％包含有_開關元 件98以及-像素電極(pixel elect崎辦，盆 連接於所對應的掃瞄線92 八幵胃70件98 一像素96被驅動時，㈣應的資料線…當某 連接的掃描線92以門啟^⑨*會被施加于該像素96所 碣啟開關元件98，然後再蕤ώ次W 資料電壓經由開關元件 象:二線 广描電壓被施加於掃描線92上而使J = 4，資料線94上的:欠# 吏開關凡件98開啟 ㈣進行充電，而二:?會經由 描電壓被移除而使得77子偏轉’而當掃描線上的掃 崎像素電極99則保持其被充電的 1270045 狀態。掃描線92會控制開關元件98重複地開關，使得像 素電極99可重複地被資料線94充電。掃描線92上不同的 資料線電壓會使晝素96的液晶分子產生·不同角度的偏 轉’而使晝素96呈現出不同的透光率，而如此一來，液晶 顯示面板32即可呈現出不同的顯示晝面。 請再參考第5圖及第6圖。為過激驅動液晶面板以， 液晶顯示器30係利用查表電路40將原先的影像資料Dc、 « DP經查表轉換成—過激影像資料Dgv。液晶顯示面板Μ 所顯示的晝面會週期性地被更新，每—週期所顯示的晝面 稱為一個圖框(frame)，而其週期則可稱為圖框週期洚啦e period)。每一圖框週期内，液晶顯示器邓會接收每—像素 於該圖框週期的影像資料，而每-影像資料皆用來控制二、 對應的像素96於一對應的圖框週期内表現出一對應^的灰 階。為過激驅動液晶面板32的每一像素96， 带 ^ 、 —表電路40 於每一圖框週期都會比較前後兩圖框週期的影像資料 及Dp，以決定一過激影像資料Dov，並 0 兀以所決疋的過教 像資料Dov來代替原先的影像資料^ Μ驅動液晶面 32中的像素96,而資料線驅動電路％會依據過激影像次 料Dov產生相對的資料線電壓，並施加此—電壓於對應:、 資料線94上，以過激驅動所對應的像素％。 、…勺 11 1270045 請參考第7圖至第9圖，第7圖為第5圖查表電路40 之功能方塊圖，第8圖為第7圖一第一查表元件50所使用 到的一第一階參數表60之示意圖，第9圖為第7圖一第二 查表元件52所使用到的一第二階參數表70之示意圖。第 一階參數表60包含有排列成一矩陣之複數個第一階區塊 62,此矩陣的每一列及每一行的第一階區塊62皆對應於一 對應的灰階範圍，例如左上角的第一階區塊62即對應於當 時影像資料Dc之灰階範圍0〜31並同時對應於延遲影像資 料之灰階範圍〇〜31，而右上角的第一階區塊62則對應於 當時影像資料Dc之灰階範圍224〜255並同時對應於延遲影 像資料之灰階範圍〇〜31，而其他第一階區塊62所對應的 灰階範圍則可依此類推。第一階參數表60的被劃分為一第 一階非特定區64以及一第一階特定區66，而位於第一階 非特定區64的每一第一階區塊62皆記錄有至少一對應的 第一階參考資料Dn〜D88。與第一階參數表60類似地，第 二階參數表70包含有複數個第二階區塊72，且第二階參 數表70被劃分為一第二階非特定區74以及一第二階特定 區76，而位於第二階非特定區74之每一第二階區塊72皆 記錄有一對應的第二階參考貨料Di_i〜D32-32。需說明的 是，第一階參數表60的第一階非特定區64以及第一階特 12 1270045 定區66的數目不限於都只有一個，亦即第一階參數表60 包含複數個第一階非特定區64的情形，以及第一階參數表 60包含複數個第一階特定區66的情形，皆屬本發明所欲 涵蓋之範疇。同樣地，第二階參數表70的第二階非特定區 74以及一第二階特定區76的數目不限於都只有一個，亦 即第二階參數表70包含複數個第二階非特定區74的情 形，以及第二階參數表70包含複數個第二階特定區76的 情形，亦是本發明所欲涵蓋之範疇。 當查表電路40在決定某一像素於某一圖框週期的過激 影像資料Dov時，查表電路40的第一查表元件50會依據 該像素於該圖框週期的當時影像資料Dc以及前一週期的 影像資料（即延遲影像資料Dp)來決定，而在決定過激影像 資料Dov之前，查表電路40會先依據當時影像資料Dc以 及延遲影像資料Dp，從第一階區塊62中選出一第一階參 考區塊，舉例來說，若當時影像資料Dc的值等於196而延 遲影像資料Dp的值等於40時，上述的第一階參考區塊即 是記錄第一階參考資料D27的第一階區塊62。若上述的第 一階參考區塊位於第一階非特定區62中，則查表電路40 的一計算單元54會依據第一階參考區塊所記錄的第一階 參考資料Dn、D12…D87或D88來計算出過激影像資料 13 1270045BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of overdriving a liquid crystal display panel, and more particularly to a method of overdriving a liquid crystal display panel in a multi-step look-up manner. [Prior Art] In general, liquid crystal displays have the advantages of light weight, low power consumption, low radiation, and the like. Therefore, liquid crystal displays have been widely used in various portable information products on the market, such as notebook computers and personal digital devices. Products such as personal digital assistant (PDA). In addition, LCD screens and LCD TVs have become popular, replacing traditionally used cathode ray tube displays and televisions. However, liquid crystal displays also have their disadvantages. Because of the limitation of the liquid crystal molecular characteristics, when the image data is switched, the liquid crystal molecules must be reversed to change the arrangement direction, so that the kneading delay occurs. In order to respond to the rapid switching of images, how to improve the response speed of liquid crystals is becoming more and more important. In order to speed up the deflection speed of the liquid crystal molecules of the pixel, the recent overdrive (please drive) method has been used on the liquid crystal display, and the overdrive method is to increase the pixel (4) to increase the surface to increase the pixel conversion to grayscale 1270045. When the difference in image data values, the speed of deflection of its liquid crystal molecules is accelerated. In addition, since the data voltage applied to the pixel may be different from the original predetermined data voltage by the method of overdrive driving, in the driving circuit of the general liquid crystal display device, a look-up table component (Look_Up Table) is usually designed. Unit, LUT unit), by means of image poor materials in the front and back of the frame period, an excessive image is found in a parameter table (Look_UpTable, LUT) to replace the original image data, thereby making the data line driving circuit Generating a data voltage corresponding to the overexcited image data to overdrive a certain pixel in the liquid crystal display panel. Please refer to FIG. 1 and FIG. 2 , the first diagram is a data flow diagram of a conventional look-up table component 1 , and the second diagram is a schematic diagram of a worm table 12 used by the third map component 1 〇 . . The main function of the look-up table component 10 is based on a current image data De and a delayed image data Dp, and the corresponding over-excited image data Dout is output from the parameter table u and output. Parameter Table 12 records a plurality of super-excited images (4) 14. The look-up component 1() finds the over-excited image data according to the image data of the two frame periods before and after, and applies the corresponding data line voltage to drive the liquid crystal molecules of the pixel. Deflected to the appropriate angle to represent the corresponding gray level. The lookup element 1() records the overexcited image material required for any gray scale conversion to other gray scales. The advantage is that its accuracy is higher, but its disadvantage is that the amount of material is large, such as per stroke. The length of 1270045 14 is 8 bits to calculate, and the memory capacity required to store table lookup element 10 is (256x25 6x8x3) bits, which is 196,608 bytes. Please refer to FIG. 3 and FIG. 4, FIG. 3 is a data flow diagram of another conventional look-up table component 20, and FIG. 4 is a schematic diagram of a parameter table 24 used by the look-up table component 20 of FIG. Similar to the prior art, the look-up component 20 also queries a parameter table 24 based on the current image data Dc and the delayed image data Dp to determine an over-excited image data Dout, which is different from the over-excited image data. The Dout-based calculation unit 22 obtains a parameter value Dref obtained by querying the parameter table 24 and obtains it by an internal difference method. The parameter table 24 records a plurality of parameter values 26, each of which corresponds to a certain gray scale range of image data Dc and a gray scale range of delayed image data Dp, for example, the parameter value D3_2 corresponds to the gray scale range. The image data Dc of 16 to 23 and the delayed image data Dp of the gray scale range of 8 to 15. Because the overtone image data Dout calculation unit 22 obtains the internal difference calculation according to the parameter value Dref obtained from the query parameter table 24, the accuracy is low, but the amount of data is relatively low, for example, each of the overexcited data The length of 26 is 16 bits to calculate, and the memory capacity required for storing the lookup element 10 is (32x32x16x3) bits, that is, 6,144 bytes. 1270045 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for over-exciting a liquid crystal display panel that takes into account both the amount of material and accuracy. To solve this method is used for overdrive - Pan S-Lee LCD display panel. The liquid panel contains a reduced number of pixels, and (4) - the pixel contains # θ., ', and is not available - a switching element for controlling the operation of the liquid crystal element. The :: component includes: receiving the image data of each pixel in each frame period is used to control - the corresponding pixel is in the corresponding picture period 2 image - corresponding to the order; the received phase image (four) is delayed Performing image data to produce a delay of the pixels; constructing: a table of numbers including a thief-moment step block, each column of the matrix and a first-order region of each _ row = the first - 0 off, the material-order parameter table is divided into at least "white non-specific areas and at least "-- (four) (four), and each-first-order block of the Zhuo-specific area records at least one pair of library orders Non-test data; miscellaneous shirts "materials delay (4) are t 疋 mother - pixels in each frame period - over-excited image data, its "decision, f--pixels in a frame _ of the over-excited image data, First: according to the image data of the X pixel in the 4 frame period and the image data of the delay of the pixel in the previous frame l27〇〇45 cycles, from the [order block] a first _ order reference block; If the first-order reference block is located in the non-specific area of the 呤楚^ 弟 —, the __ test is calculated according to the first-test block If the first-order reference (4) first-order specific area towel is used, the second-order parameter table is subtracted to calculate the image data: / [Embodiment] Please refer to FIG. 5, 5 is a functional block diagram of a night crystal display 30 implemented in accordance with the method of the present invention. The liquid crystal display 3 includes a liquid-liquid panel 32, an analog/digital conversion circuit 34, a signal connection _% = a buffer 38. - a look-up circuit 40, a clock control circuit 42, a female output 44, a data line drive circuit 46 w η . and a scan line drive circuit 48. The analog/digital conversion circuit 34 is used for the polar (four) analogy Image data is converted into digital image data, signal receiving 埠36, county Tianshi, 彳疋 is used to transfer digital shadow y knife to buffer 38 and table look-up circuit, ten {private road 4 〇. buffer 38 will receive The image data obtained is delayed by a frame period and then transmitted to the table 40. The look-up circuit 40 is based on the image of the shirt of the first time, "Tianshi", and the delayed image after delaying one frame period. Data Dp, φ ^ stone query related parameter table, to decide The image data D0V is overexcited. The clock spur circuit 42 is operated by the 吝 吝 & sync clock signal ' to control the signal input _ 仏 data line drive circuit 46 1270045 and the sweep line drive circuit 48. 48, the switching elements of each pixel of the liquid crystal panel 32 are sequentially turned on, so that the data line driving circuit 46 can convert the image output signal D_ from the signal output port 44 into a relative voltage signal, and then applied to the liquid crystal panel 32, and then The liquid crystal molecules of the pixels are deflected and the center of the circle corresponds to the gray scale of the image output signal Dout. _ The circuit diagram of the narrow crystal panel 32. The liquid crystal panel 32 includes a plurality of scans, a plurality of pure lines, and a plurality of Pixel 96. Each pixel 96 is connected to the corresponding broom line % and the corresponding (four) line 94, and each pixel % includes a _switch element 98 and a pixel electrode (pixel elective, the basin is connected to the corresponding scan) Line 92 Eight Diagrams Stomach 70 Pieces 98 One pixel 96 is driven, (four) should be the data line... When a connected scan line 92 is gated, the gate 9 is applied to the pixel 96 to turn on the switching element 98, and then The WW data voltage is applied to the scan line 92 by the switching element like: the second line is applied to the scan line 92 to make J=4, and the data line 94 is: ## 吏 switch unit 98 is turned on (4) for charging, and two: The 77 sub-deflection will be removed via the tracing voltage while the zigzag pixel electrode 99 on the scan line maintains its charged state of 1270045. The scan line 92 controls the switching element 98 to repeatedly switch so that the pixel electrode 99 can It is repeatedly charged by the data line 94. Different data line voltages on the scan line 92 cause the liquid crystal molecules of the alizarin 96 to be deflected at different angles, and the alizarin 96 exhibits different transmittances, and thus, The liquid crystal display panel 32 can display different displays昼Please refer to Fig. 5 and Fig. 6. In order to drive the liquid crystal panel excessively, the liquid crystal display 30 uses the look-up table circuit 40 to convert the original image data Dc, «DP through the look-up table into the over-excited image data Dgv. Panel Μ The displayed face is periodically updated. The face displayed in each cycle is called a frame, and the period is called the period of the frame. During each frame period, the liquid crystal display Deng will receive the image data of each pixel in the frame period, and each image data is used to control two, and the corresponding pixel 96 exhibits in a corresponding frame period. Corresponds to the gray level of ^. In order to overdrive each pixel 96 of the liquid crystal panel 32, the image circuit and the Dp are compared with each frame period in each frame period to determine an over-exaggered image data Dov, and 0 The determined image data Dov replaces the original image data ^ Μ driving the pixel 96 in the liquid crystal surface 32, and the data line driving circuit % generates a relative data line voltage according to the overtone image material Dov, and applies this - The voltage corresponds to: on the data line 94, the pixel corresponding to the overdrive is driven by %. ,... Spoon 11 1270045 Please refer to FIG. 7 to FIG. 9 , FIG. 7 is a functional block diagram of the table lookup circuit 40 of FIG. 5 , and FIG. 8 is a diagram of the first lookup element 50 of FIG. 7 . A schematic diagram of the first order parameter table 60, and FIG. 9 is a schematic diagram of a second order parameter table 70 used by the second table lookup element 52 of FIG. The first-order parameter table 60 includes a plurality of first-order blocks 62 arranged in a matrix, and each column of the matrix and the first-order block 62 of each row correspond to a corresponding gray-scale range, such as the upper left corner. The first-order block 62 corresponds to the gray-scale range 0~31 of the current image data Dc and corresponds to the gray-scale range 〇~31 of the delayed image data, and the first-order block 62 in the upper right corner corresponds to the current image. The gray scale range of the data Dc is 224~255 and corresponds to the gray scale range 〇~31 of the delayed image data, and the gray scale range corresponding to the other first order block 62 can be deduced by analogy. The first order parameter table 60 is divided into a first order non-specific area 64 and a first order specific area 66, and each first order block 62 located in the first order non-specific area 64 is recorded with at least one Corresponding first-order reference materials Dn~D88. Similarly to the first order parameter table 60, the second order parameter table 70 includes a plurality of second order blocks 72, and the second order parameter table 70 is divided into a second order non-specific area 74 and a second order. The specific area 76, and each second stage block 72 located in the second-order non-specific area 74 records a corresponding second-order reference material Di_i DD32-32. It should be noted that the number of the first-order non-specific area 64 and the first-order special 12 1270045 fixed-region 66 of the first-order parameter table 60 is not limited to one, that is, the first-order parameter table 60 includes a plurality of first The case of the non-specific region 64, and the case where the first-order parameter table 60 includes a plurality of first-order specific regions 66 are all within the scope of the present invention. Similarly, the number of the second-order non-specific area 74 and the second-order specific area 76 of the second-order parameter table 70 is not limited to one, that is, the second-order parameter table 70 includes a plurality of second-order non-specific areas. The case of 74, and the case where the second-order parameter table 70 includes a plurality of second-order specific regions 76 are also the scope of the present invention. When the look-up table circuit 40 determines the over-excited image data Dov of a certain pixel in a certain frame period, the first look-up table component 50 of the look-up table circuit 40 according to the pixel's current image data Dc and the front of the frame period. The image data of one cycle (ie, the delayed image data Dp) is determined. Before determining the image data Dov, the look-up circuit 40 first selects from the first-order block 62 according to the current image data Dc and the delayed image data Dp. a first-order reference block, for example, if the value of the image data Dc is equal to 196 and the value of the delayed image data Dp is equal to 40, the first-order reference block is the first-order reference data D27. First stage block 62. If the first-order reference block is located in the first-order non-specific area 62, a computing unit 54 of the look-up table circuit 40 records the first-order reference data Dn, D12...D87 according to the first-order reference block. Or D88 to calculate the overtone image data 13 1270045
Dov ;而若第一階參考區塊位於第一階特定區66中，則計 算單元54會依據第二階參數表70來計算出過激影像資料 Dov 〇 再進一步地說，當上述的第一階參考區塊位於第一階 特定區66中時，查表電路40的第二查表元件52會依據當 時影像資料Dc及延遲影像資料Dp從第二階區塊72中選 出一第二階參考區塊，並判斷此一第二階參考區塊係位於 第二階非特定區74中，亦或是位於第二階特定區76中。 若第二階參考區塊位於第二階非特定區74中，則計算單元 54會依據第二階參考區塊所記錄的第二階參考資料Dm、 Di_2…D32-31或D32-32來計算出過激影像資料D〇V ;而若第 二階參考區塊位於第二階特定區76中，則計算單元54會 依據一第三階參數表80 (如第10圖所示）來決定過激影 像資料Dov。 不論計算單元54係依據第一階參考區塊所記錄的第一 階麥考資料Dn、Di2"*Ds7或Ds8來計鼻過激影像資料Dov ’ 或是依據第二階參考區塊所記錄的第二階參考資料Dw、 〇ΐ-2···〇32-31或D32-32來計算過激影像資料D〇V，其皆可以是依 據其所得的參考資料以内差法（或是其他運算方法）來計 14 1270045Dov; and if the first-order reference block is located in the first-order specific region 66, the calculating unit 54 calculates the over-excited image data Dov according to the second-order parameter table 70. Further, when the first order is described above When the reference block is located in the first-order specific area 66, the second look-up element 52 of the look-up table circuit 40 selects a second-order reference area from the second-order block 72 according to the current image data Dc and the delayed image data Dp. And determining that the second-order reference block is located in the second-order unspecified area 74 or in the second-order specific area 76. If the second-order reference block is located in the second-order non-specific area 74, the calculating unit 54 calculates according to the second-order reference data Dm, Di_2...D32-31 or D32-32 recorded by the second-order reference block. Excessive image data D〇V is generated; and if the second-order reference block is located in the second-order specific area 76, the calculating unit 54 determines the over-excited image according to a third-order parameter table 80 (as shown in FIG. 10). Information Dov. Regardless of the calculation unit 54, the first-order reference data recorded by the first-order reference block Dn, Di2"*Ds7 or Ds8 is used to count the nasal image data Dov' or according to the second-order reference block. The second-order reference data Dw, 〇ΐ-2···〇32-31 or D32-32 is used to calculate the over-excitation image data D〇V, which may be based on the obtained reference data by internal difference method (or other arithmetic method). To count 14 1270045
算，而兩者的不同之處在於其精確度的不同，其中因為每 第一階區塊72所對應的灰階範圍（2灰階)較每第一階區塊 62所對應的灰階範圍（32灰階）小，故依據第二階參考資料 Di_i、Di_2…D32-31或D32-32所計算出來的過激影像資料D〇V其 精確度較第一階參考資料Du、D12-D87或D88所計算出來的 過激影像資料Dov來得高。除此之外，如第10圖所示，第 三階參數表80包含複數個第三階區塊82，每一第三階區 塊82分別對應於當時影像資料Dc的某一灰階及影像資料 Dc的某一灰階，並記錄有一過激影像資料。當第二階參考 區塊位於第二階特定區76中時，計算單元54會依據當時 影像資料Dc及延遲影像資料Dp直接從第三階參數表80 找出對應的過激影像資料Dov。故依據第三階參數表80所 決定的過激影像資料Dov其精確度會較依據第二階參考資 料Di_i、Di_2…D32-3I或D32-32所計算出來的過激影像資料Dov 來得高。 在本發明的另一個實施例中，第二階參數表70並無被 劃分為一第二階非特定區74以及一第二階特定區76，而 只包含複數個第二階區塊72。在此實施例中，其驅動電路 同樣地會依據前後兩圖框週期的影像資料，從第一階區塊 62中選出一第一階參考區塊，並判斷此一第一階參考區塊 15 1270045 係位於第一階非特定區62中或是位於第一階特定區66 中。若上述的第一階參考區塊位於第一階非特定區62中， 則計算單元54依據第一階參考區塊所記錄的第一階參考 資料Dn、DfD87或D88來計算出過激影像資料Dov ;而若 第一階參考區塊位於第一階特定區66中，則計算單元54 會依據兩圖框週期的影像資料Dc、Dp，從第二階參數表 70讀取對應第二階區塊72所記錄的參考資料，並根據所 讀取的參考資料求得過激影像資料Dov。 相較於習知過激驅動液晶顯示面板的方法，本發明之方 法可針對不同精確度之過激影像資料的需要，來設置各階 的參數表，並於各階的參數表中劃分特定區及非特定區， 而可在記憶體容量需求及過激影像資料準確度間取得一個 平衡。 以上所述僅為本發明之較佳實施例，凡依本發明申請專 利範圍所做之均等變化與修飾，皆應屬本發明專利之涵蓋 範圍。 【圖式簡單說明】 第1圖為習知一查表元件之資料流向圖。 16 1270045 第2圖為第1圖查表元件所使用到的一參數表之示意圖。 第3圖為另一習知查表元件之資料流向圖。 第4圖為第3圖查表元件所使用到的一參數表之示意圖。 第5圖為依據本發明之方法貫施的一液晶顯不裔之功能方 塊圖。 第6圖為第5圖液晶面板之電路圖。 第7圖為第5圖查表電路之功能方塊圖。 第8圖為第7圖一第一查表元件所使用到的一第一階參數 表之示意圖。 第9圖為第7圖一第二查表元件所使用到的一第二階參數 表之示意圖。 第10圖為一第三階參數表之示意圖。 【主要元件符號說明】 10、20查表元件 12、 24參數表 14、 26激影像資料 22 計算單元 30 液晶顯不 32 液晶面板 34 類比/數位轉換電路 36 訊號接收埠 38 緩衝器 40 查表電路 42 時脈控制電路 44 訊號輸出埠 46 資料線驅動電路 48 掃瞄線驅動電路 17 1270045 50 第一查表元 52 第二查表元件 54 計算單元 60 第一階參數表 62 第一階區塊 64 第一階非特定區 66 第一階特定區 70 第二階參數表 72 第二階區塊 74 第二階非特定區 76 第二階特定區 80 第三階參數表 82 第三階區塊 92 掃瞄線 94 資料線 96 像素 98 開關元件 99 像素電極The difference between the two is the difference in accuracy, because the gray scale range (2 gray scale) corresponding to each first order block 72 is larger than the gray scale range corresponding to each first order block 62. (32 gray scale) is small, so the super-excited image data D〇V calculated according to the second-order reference data Di_i, Di_2...D32-31 or D32-32 is more accurate than the first-order reference material Du, D12-D87 or The over-excited image data calculated by D88 is high. In addition, as shown in FIG. 10, the third-order parameter table 80 includes a plurality of third-order blocks 82, and each of the third-order blocks 82 corresponds to a certain gray level and image of the image data Dc at that time. A gray scale of the data Dc, and recorded a superficial image data. When the second-order reference block is located in the second-order specific area 76, the calculating unit 54 directly finds the corresponding over-excited image data Dov from the third-order parameter table 80 according to the current image data Dc and the delayed image data Dp. Therefore, the accuracy of the overexcited image data Dov determined according to the third-order parameter table 80 is higher than that of the over-excited image data Dov calculated based on the second-order reference materials Di_i, Di_2...D32-3I or D32-32. In another embodiment of the present invention, the second order parameter table 70 is not divided into a second order non-specific area 74 and a second order specific area 76, but only a plurality of second order blocks 72. In this embodiment, the driving circuit similarly selects a first-order reference block from the first-order block 62 according to the image data of the two frame periods, and determines the first-order reference block 15 The 1270045 is located in the first-order unspecified area 62 or in the first-order specific area 66. If the first-order reference block is located in the first-order unspecified area 62, the calculating unit 54 calculates the over-excited image data Dov according to the first-order reference data Dn, DfD87 or D88 recorded by the first-order reference block. If the first-order reference block is located in the first-order specific area 66, the calculating unit 54 reads the corresponding second-order block from the second-order parameter table 70 according to the image data Dc, Dp of the two-frame period. 72 recorded reference materials, and based on the reference materials read, the over-excited image data Dov was obtained. Compared with the conventional method for driving the liquid crystal display panel, the method of the present invention can set the parameter table of each order for the need of the image data of different precisions, and divide the specific area and the non-specific area in the parameter table of each order. , to achieve a balance between memory capacity requirements and the accuracy of over-exaggerated image data. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the patentable scope of the present invention should be covered by the present invention. [Simple description of the diagram] Figure 1 is a data flow diagram of a conventional look-up table component. 16 1270045 Figure 2 is a schematic diagram of a parameter table used to look up the components of Figure 1. Figure 3 is a data flow diagram of another conventional look-up table component. Figure 4 is a schematic diagram of a parameter table used in the chart lookup element of Figure 3. Figure 5 is a functional block diagram of a liquid crystal display in accordance with the method of the present invention. Fig. 6 is a circuit diagram of the liquid crystal panel of Fig. 5. Figure 7 is a functional block diagram of the circuit in Figure 5. Figure 8 is a schematic diagram of a first order parameter table used in the first table lookup element of Figure 7. Figure 9 is a schematic diagram of a second-order parameter table used in Figure 7 and the second look-up table component. Figure 10 is a schematic diagram of a third-order parameter table. [Main component symbol description] 10, 20 table lookup component 12, 24 parameter table 14, 26 image data 22 calculation unit 30 liquid crystal display 32 liquid crystal panel 34 analog/digital conversion circuit 36 signal reception 埠 38 buffer 40 look-up table circuit 42 clock control circuit 44 signal output 埠 46 data line drive circuit 48 scan line drive circuit 17 1270045 50 first look-up table element 52 second look-up table element 54 calculation unit 60 first-order parameter table 62 first-order block 64 First-order non-specific area 66 First-order specific area 70 Second-order parameter table 72 Second-order block 74 Second-order non-specific area 76 Second-order specific area 80 Third-order parameter table 82 Third-order block 92 Scan line 94 data line 96 pixels 98 switching element 99 pixel electrode