1295046 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種液晶螢幕的顯示方法，尤指插入調 暗圖框的顯示方法。 【先前技術】 目前’已有許多提昇LCD的灰階響應速度的方法被提 出’其中一種被稱之為模擬脈衝驅動方法（Pseud〇 Impulse Ddve，PID)是較被看好的方法。顧名思義，piD 係利用模擬如CRT的脈衝驅動方式而驅動LCD，使得LCD 能盡可能接近CRT的顯示效果。 請參閱第1圖，第1圖為習知模擬脈衝驅動方法之示 意圖。如第1圖所示，一影像係由循序地播放圖框1 、 2、3和4所構成。第一種模擬脈衝驅動方法係藉著於圖 框1和2之間、圖框2和3之間以及圖框3和4之間分別 地插入全黑的資料圖框12和丨3，而分別對應上述每 一個圖框個別時間點的背光源14〜20均為發光狀態，第一 種模擬脈衝奥動方法正是藉此達成模擬脈衝的目的。 然而’如以上述的PID方式驅動液晶螢幕時，若液b曰 銀幕的更新率只有60Hz的情況下，很容易於圖框1和2 1295046 之間、圖框2和3之間以及圖框3和4之間分別地插入一 全黑的資料圖框1 1、12和1 3時，因為這種變化頻率，容易 被人眼辨識出所顯示的畫面具有閃爍（flicker)現象。此 外’也容易因為在顯示正常的圖框2前，先顯示全黑的資 料圖框11，導致液晶銀幕的受度降低至原本的，所 以，採用此種PID驅動液晶銀幕，必須大幅增加背光源的 發光效率，以彌補亮度的損失。 【發明内容】 本發明之主要目的在提供一種液晶螢幕的顯示方法， 藉著插入調暗圖框，而避免閃爍現象。 #本發明之另一目的在提供一種液晶螢幕的顯示方法， 曰者調暗圖框，而避免因亮度降低過多，需要採用較 高發光效率的背光源，進而增加額外的成本。 基於上述目的，本發明係提供一種液晶螢幕的顯示方 法’使传液晶螢幕在顯示時間上為串列的圖框伽叫所構 成的p像8$於圖框之間插入調暗圖框，而調暗圖框與上 一圖框相比為較暗者。 關於本發明之優點與精神可以藉由以下的發明詳述及 所附圖式得到進一步的瞭解。 I295046 【實施方式】 請參閱第2圖，第2圖為本發明液晶螢幕的顯示方法 之不意圖。如第2圖所示，本發明之液晶螢幕的顯示方 法’主要是將如第1圖所示之全黑的資料圖框11% 12，以 调暗圖框31、32取代。 於液晶螢幕上所顯示的影像（vide〇)，乃由時間上為串 列的圖框1 、2、3所構成，所以，若於圖框i和2以及 圖框2和3之間分別插入調暗圖框3丨、32時，不但可以形 成另一種樣態PID，提昇LCD的灰階響應速度，更可以大 大改善閃爍現象和亮度過低的問題。1295046 IX. Description of the Invention: [Technical Field] The present invention relates to a display method of a liquid crystal screen, and more particularly to a display method for inserting a darkened frame. [Prior Art] At present, there have been many methods for improving the gray-scale response speed of LCDs. One of them, called the analog pulse driving method (Pseud〇 Impulse Ddve, PID), is a relatively preferred method. As the name suggests, piD drives the LCD with a pulse-driven approach such as a CRT, making the LCD as close as possible to the CRT display. Please refer to Fig. 1. Fig. 1 is a schematic diagram of a conventional analog pulse driving method. As shown in Fig. 1, an image is composed of sequentially playing frames 1, 2, 3 and 4. The first analog pulse driving method inserts all black data frames 12 and 借3 between frames 1 and 2, between frames 2 and 3, and between frames 3 and 4, respectively. The backlights 14 to 20 corresponding to the respective time points of each of the above frames are in a light-emitting state, and the first analog pulse-oscillation method is the purpose of achieving the analog pulse. However, if the liquid crystal screen is driven by the above PID method, if the liquid b 曰 screen update rate is only 60 Hz, it is easy to be between frames 1 and 2 1295046, between frames 2 and 3, and frame 3. When a black data frame 1 1 , 12 and 13 is inserted between 4 and 4 respectively, because of this frequency of change, it is easy for the human eye to recognize that the displayed picture has a flicker phenomenon. In addition, it is also easy to display the black frame 11 before displaying the normal frame 2, which causes the liquid crystal screen to be reduced to the original. Therefore, the backlight must be greatly increased by using the PID to drive the liquid crystal screen. The luminous efficiency to compensate for the loss of brightness. SUMMARY OF THE INVENTION The main object of the present invention is to provide a display method for a liquid crystal screen, which avoids flicker by inserting a darkened frame. Another object of the present invention is to provide a display method for a liquid crystal screen, which is to dim the frame without avoiding excessive brightness reduction, and requires a backlight having a higher luminous efficiency, thereby adding additional cost. Based on the above object, the present invention provides a display method of a liquid crystal screen, which allows a liquid crystal screen to be inserted into a dimming frame between the frames of a p-image of a series of frames. The darkened frame is darker than the previous one. The advantages and spirit of the present invention will be further understood from the following detailed description of the invention. I295046 [Embodiment] Please refer to FIG. 2, which is a schematic view showing a display method of a liquid crystal panel according to the present invention. As shown in Fig. 2, the display method of the liquid crystal panel of the present invention is mainly replaced by a darkened data frame 11% 12 as shown in Fig. 1 with dimming frames 31 and 32. The image (vide〇) displayed on the LCD screen is composed of frames 1, 2, and 3 that are in series in time, so if they are inserted between frames i and 2 and frames 2 and 3, respectively. When dimming the frames 3丨 and 32, not only can another form PID be formed, the gray-scale response speed of the LCD can be improved, and the problem of flickering and low brightness can be greatly improved.
間單而言’所謂調暗圖框3丨係指與上一圖框1相比為 較暗者。具體而言，若欲顯示如第2圖所示之調暗圖框31 時，會基於圖框1中相對應的像素點的像素值，乘上1/N 後為調暗圖框31中每個像素點的像素值，而N為〇以上的 正整數。 由於像素值是數值越小者顏色越深、越暗，所以，此 N值越大時，圖框！中原來的像素點的像素值乘上i/n 後，調暗圖框31將會越接近如第丨圖所示之全黑的資料圖 框11，相反地，若此N值越小時，所顯的調暗圖框3丨或 32，將越不會改變圖框j中原來的像素點的像素值，亦即 將會越接近傳統的hold type的液晶銀幕。所以，如何決定 N值的大小，則必須取決於其顯示效果必須比h〇idtype 1 1295046 ----*；一…丨丨__丨·丨㈣ /ΙΑ日修(更)正替換这 好，但其閃燦現象和亮度過低又不至於如全黑的資料圖框 11或12時來得嚴重。 綜上所述，本發明所提供的液晶螢幕的顯示方法，以 調暗圖框31或32取代全黑的資料圖框丨丨或^，由於調暗圖 框3 1或32可藉著调整N值，而避免採用piD所造成的閃爍 現象，同時，也可藉此避免採用PID所造成亮度降低過” 多，進而避免採用較高發光效率的背光源所額外增加的成 本。 請參閱第3A〜3B圖，第3A〜3B圖為本發明輸入調暗訊 號之示忍圖。如第3A〜3B圖所示，習知的資料驅動器7〇的 基本架構中至少包含複數組數位/類比轉換器80和資料記 錄器82。每一資料驅動器7〇所需連接的資料線、多少組數 位/類比轉換器80和資料記錄器82，均基於液晶面板的解 析度而決定。 由於本發明所採用的顯示方法中，除了正常的圖框 1〜3外’還額外增加了調暗圖框31、32等的顯示，因此將 會導致資料驅動器7〇的掃描頻率為習知的兩倍，進而容易 產生EMI ’且對於資料頻寬的需求也會增加。所以，為了 避免資料驅動器70為了顯示調暗圖框31、32而增加掃描頻 率’藉著使資料驅動器7σ另連接調暗控制線而接收調暗訊 號。 如第3Α圖所示，調暗控制線係連接資料記錄器82。 1295046In the case of a single sheet, the so-called dimming frame 3 refers to a darker one compared to the previous frame 1. Specifically, if the dimming frame 31 as shown in FIG. 2 is to be displayed, the pixel value of the corresponding pixel in the frame 1 is multiplied by 1/N to be the dimming frame 31. The pixel value of one pixel, and N is a positive integer above 〇. Since the pixel value is the smaller the value, the darker and darker the color, the larger the value of N, the frame! After multiplying the pixel value of the original pixel by i/n, the darker frame 31 will be closer to the all black data frame 11 as shown in the figure, and conversely, if the N value is smaller, The apparent dimming frame 3丨 or 32 will not change the pixel value of the original pixel in frame j, that is, the closer to the traditional hold type LCD screen. Therefore, how to determine the size of the N value must depend on its display effect must be better than h〇idtype 1 1295046 ----*; one ... 丨丨 __ 丨 · 丨 (four) / ΙΑ 修 (more) is replacing this good However, its flashing phenomenon and low brightness are not as serious as the black frame 11 or 12. In summary, the display method of the liquid crystal screen provided by the present invention replaces the all black data frame 丨丨 or ^ with the dimming frame 31 or 32, since the dimming frame 3 1 or 32 can be adjusted by N Value, and avoid the flicker caused by piD, at the same time, it can also avoid the increase in brightness caused by PID, so as to avoid the additional cost of backlight with higher luminous efficiency. Please refer to section 3A~ 3B, 3A to 3B are diagrams showing the input dimming signal of the present invention. As shown in Figures 3A to 3B, the basic structure of the conventional data driver 7A includes at least a complex array digital/analog converter 80. And the data logger 82. Each data driver 7 〇 required data line, how many sets of digital/analog converter 80 and data logger 82 are determined based on the resolution of the liquid crystal panel. In the method, in addition to the normal frames 1 to 3, the display of the dimming frames 31, 32, etc. is additionally added, so that the scanning frequency of the data driver 7〇 is twice as conventional, and EMI is easily generated. 'And for the frequency of data The wide demand will also increase. Therefore, in order to prevent the data driver 70 from increasing the scanning frequency for displaying the dimming frames 31, 32, the dimming signal is received by connecting the data driver 7σ to the dimming control line. As shown, the dimming control line is connected to the data logger 82. 1295046
g 修(:更, 因此’當資料驅動器70欲輸出為調暗圖框31或32之驅動電 I® n-jb 呀’資料驅動器70中的資料記錄器82在接獲此調暗訊號 將會使其暫存於資料記錄器82的像素資料，變成上— 圖框1或2中相對應的像素點的1/N的像素值，直到顯示 凡整個調暗圖框31或32。因此，當此已被調整過的數位訊 號’在輪入數位/類比轉換器8〇時，其所輸出的驅動電壓 就疋相對於調暗圖框3 1或3 2。如此，則不須先將調暗圖框 31或32暫存於資料記錄器82，而是改變原先已儲存的像素 資料’如此同樣地藉著此調暗訊號間接使得資料驅動器 所輸出的驅動電壓為調暗圖框31或32。 如第3 B圖所示，調暗控 和數位/類比轉換器80之間。 出為調暗圖框3 1或3 2之驅動電 位/類比轉換器8 〇之間任何一 換器80)，在接獲此調暗訊號 類比轉換器80的數位訊號，亦 1/N的像素值。在成為原來的 轉換器80轉換成類比訊號。如 或32暫存於資料記錄器82，而 接使得資料驅動器70所輪出的 32 〇 制線係連接在資料記錄器8: 因此’當資料驅動器7〇欲輜 壓時，於資料記錄器82和奏 個元件（包含數位/類比举 時，將會使得在輸入數位丨 即像素資料，成為原來的 後，在藉由數位/類只 此’則不須先將調暗圖框3 疋同樣地藉著此調暗訊號段 驅動電壓為調暗圖框31或_ 描 藉由以上較佳具體實施例之詳逃 述本發明之特徵與精神，而並非以 ’係希望能更加请楚 上述所揭露的較佳具 1295046 體實施例來對本發明之範疇加以限制。相反地，其目的是 希望能涵蓋各種改變及具相等性的安排於本發明所欲申請 之專利範圍的範疇内。 【圖式簡單說明】 第1圖為習知模擬脈衝驅動方法之示意圖。 第2圖為本發明液晶螢幕的顯示方法之示意圖。 第3 A〜3B圖為本發明輸入調暗訊號之示意圖。 【主要元件符號說明】 1 、2、3、4 圖框 11、12、1 3 全黑的資料圖框 14〜20背光源 31、32 調暗圖框 70 資料驅動器 80數位/類比轉換器 1〇 1295046 82 資料記錄器g repair (: more, therefore 'when the data driver 70 wants to output the drive circuit I/n-jb of the dimming frame 31 or 32', the data logger 82 in the data drive 70 will receive the dimming signal. The pixel data temporarily stored in the data logger 82 is changed to the pixel value of 1/N of the corresponding pixel point in the frame 1 or 2 until the entire dimming frame 31 or 32 is displayed. The adjusted digital signal 'when the digital/analog converter is turned on, the output voltage is 疋 relative to the dimming frame 3 1 or 3 2 . Thus, the dimming does not need to be dimmed first. The frame 31 or 32 is temporarily stored in the data logger 82, but the previously stored pixel data is changed. Thus, the driving voltage outputted by the data driver is indirectly dimmed by the dimming frame 31 or 32. As shown in Fig. 3B, between the dimming control and the digital/analog converter 80. As a dimming frame 3 1 or 3 2, the driving potential/analog converter 8 〇 between any converter 80), The digital signal received by the dimming signal analog converter 80 is also a pixel value of 1/N. In the original converter 80 is converted into an analog signal. If 32 or 32 is temporarily stored in the data logger 82, the 32 〇 line that is rotated by the data driver 70 is connected to the data logger 8: Therefore, when the data driver 7 wants to press, the data logger 82 When playing a component (including digital/classical comparison, it will make the pixel data become the original after inputting the digits/classes only), then you do not need to dim the frame 3 疋By using the dimming signal segment driving voltage as the dimming frame 31 or _, the features and spirit of the present invention are circumvented by the above-described preferred embodiments, and it is not intended to be more The invention is intended to be limited to the scope of the invention, and the scope of the invention is intended to cover various modifications and equivalent arrangements within the scope of the claimed invention. Fig. 1 is a schematic view showing a conventional analog pulse driving method. Fig. 2 is a schematic view showing a display method of a liquid crystal screen according to the present invention. Figs. 3A to 3B are diagrams showing an input dimming signal of the present invention. No. Description] 1, 2, 3, 4 Frame 11, 12, 1 3 All black data frame 14~20 Backlight 31, 32 Dimming frame 70 Data driver 80 digit/analog converter 1〇1295046 82 Recorder