201227705 六、發明說明： 【發明所屬之技術領域】 本發明係關於液晶顯示裝置，特別關於具有立體顯示功 能之液晶顯示裝置。 . 【先前技術】 、 液晶顯示裝置係具有質量輕、薄、及低耗電等優點，不 僅使用作為行動電話之顯示部等之小型顯示裝置，亦使用 作為大型電視。一般液晶顯示裝置係進行平面顯示，然而 近年來，已有提案使用液晶顯示裝置進行更具臨場感之立 體化顯示（參照專利文獻1)。 專利文獻1揭示一種立體影像顯示裝置（立體顯示系 統），其包含：液晶顯示裝置，其交替顯示左眼用圖框及 右眼用圖框；及快門眼鏡。供觀看者佩戴以觀看液晶顯示 裝置之顯不畫面。 圖4係顯示專利文獻1揭示之圖框資料及液晶快門之控制 方法之時序圖。專利文獻1之液晶顯示裝置中，在左眼用 景夕像之顯示期間’依序顯示第1左眼用圖框L i、與第1左眼 用圖框L1相同影像之第2左眼用圖框L2 ;在右眼用影像之 • 顯示期間，依序顯示第1右眼用圖框R1、與第1右眼用圖框 、 R1相同影像之第2右眼用圖框R2。此時，快門眼鏡之左眼 快門係藉由液晶快門L控制信號108，在從第1左眼用圖框 L1被寫入液晶顯示裝置後之垂直消隱期間2〇5至其後之第2 左眼用圖框L2之期間打開。又，快門眼鏡之右眼快門係藉 由液晶快門R控制信號109，在從第1右眼用圖框R1被寫入 160473.doc 201227705 液晶顯示裝置後之垂直消隱期間205至其後之第2右眼用圖 框R2之期間打開。 藉此，在專利文獻1之立體影像顯示裝置中，為防止觀 看者同時視認左眼用圖框及右眼用圖框所造成之串擾，且 延長觀看者可視認左眼用圖框及右眼用圖框之期間，藉此 謀求增加亮度。 [先前技術文獻] [專利文獻] [專利文獻1]曰本公開專利公報「特開2009-232249號公 報（2009年10月8日公開）」 【發明内容】 [發明所欲解決之問題] 如上所述，在專利文獻1之立體顯示系統中，為顯示1個 左眼用圖框（左眼圖像）’液晶顯示裝置進行2個圖框之顯 示，為顯示1個右眼用圖框（右眼圖像），液晶顯示裝置進行 2個圖框顯示，且為讓觀看者可視認1個立體圖像，液晶顯 示裝置進行4個圖框顯示。該情形下，為使觀看者視認可 動態顯示之立體圖像’有必要以高垂直掃描頻率驅動液晶 顯示裝置。如此以尚垂直知也頻率驅動液晶顯示褒置之情 形下，由於選擇各像素之期間變短’故信號延遲之影響變 大，像素之亮度有時無法達到特定值。 因此，一般液晶顯示裝置之情形係於每1圖框使像素極 性反轉，為使像素之亮度達到特定亮度，有必要分別在顯 示左眼用圖像之2圖框期間與顯示右眼用圖像之2圖框期 160473.doc 201227705 間’保持相同之像素極性。如此為在2個圖框期間保持像 素極性相同，以2個圖框週期使像素極性反轉之情形時， 顯不左眼用圖像時之像素極性與顯示右眼用圖像時之像素 極性將各自變得固定而無變化，且會因左右之圖像資料而 可能產生像素殘像。 對此’以4圖框週期使像素極性反轉之情形中，會在自 右眼圖像切換為左眼圖像時、或自左眼圖像切換為右眼圖 像時之僅任一方之時始終進行極性反轉，致使左右看到之 圖像不同。又，以6圖框以上之週期使像素極性反轉之情 形中，因各像素保持相同極性之期間較長，故發生閃爍。 參照圖5加以具體說明。 圖5 U)係顯示在每2個圖框使像素極性反轉之情形下液晶 面板之各像素極性之圖。又，圖5(b)係顯示在每4個圖框使 像素極性反轉之情形下液晶面板之各像素極性之圖。在圖 5(a)及（b)中，方格中記述之「+」、「_」分別表示像素極性 為正極性與負極性，且以鄰接於行方向及列方向之像素極 性互不相同之方式配置。 在圖5(a)中，若著眼於最左上角之像素，則在第丨圖框' 第圖杧第5圖框、第6圖框、及第9圖框之左眼圖像顯示 時’像素極性始終顯示為正極，而第3圖框、第4圖框、第 7圖框、及第8圖框中，像素極性始終顯示為負極。即，在 左眼圖像顯示時之各像素始終顯示相同極性，在右眼圖像 顯示時之各像素亦始終顯示相同極性。此時，例如液晶面 板為黑底顯示模式之面板，若在右眼圖像顯示時上述像素 1·50473.(ίοο 201227705 之顯示階度始終為最小之情形時，由於上述像素始終只在 正極性之範圍内變化，故會產生像素殘像。如此，以2圖 框週期使像素極性持續反轉之情形時，會因所要顯示之像 素資料而可能產生像素之殘像。 又，在圖5之（b)中，若著眼於最左上角之像素，則第玉 圖框至第4圖框之左眼圖像及右眼圖像皆顯示正極性，第$ 圖框至第8圖框之左眼圖像及右眼圖像皆顯示負極性，第9 圖框再次返回正極性。像素之極性雖在第4圖框轉變為第5 圖框時從正反轉為負，且在第8圖框轉變為第9圖框時從負 反轉為正，但可知在任一情形下皆為在從右眼圖像切換為 左眼圖像時進行像素極性之反轉。因此，持續使像素極性 以4圖框週期反轉之情形下，像素極性之反轉時序會變成 固定從右眼圖像切換為左眼圖像時，或從左眼圖像切換為 右眼圖像時之任一方，其結果使左眼圖像與右眼圖像看起 來不同。 又’一般電視裝置之輸入影像信號為6〇 fps以下，將 其擴展為左眼用圖像2個圖框、右眼用圖像2個圖框、總計 4圖框之情形時’若以6圖框以上週期反轉像素極性之情 形，像素極性之反轉頻率為4〇 Hz以下，而有可能發生因 像素極性反轉所產生之所謂閃爍之顯示之跳動現象。 如此，若始終以一定週期使像素極性反轉，則於各像素 中’由於左眼圖像顯示時之極性與右眼圖像顯示時之極性 始終各自固定’故會產生像素殘像，或是由於僅會在從右 眼圖像切換至左眼圖像、及從左眼圖像切換至右眼圖像之 160473.doc 201227705 任一方之切換時極性反轉’故產生左眼圖像與右眼圖像看 起來不同的異常情形》 本發明係為解決上述問題點而完成者，其目的在於實現 一種可抑制像素之殘像及顯示不均而進行顯示之液晶顯示 裝置及立體顯示系統。 [解決問題之技術手段] 為解決上述課題’本發明之液晶顯示裝置包含：液晶面 板，其包含複數個像素；及極性控制機構，其控制上述複 數個像素之極性；其特徵在於，上述極性控制機構具有使 極性反轉之週期互不相同之複數個極性反轉形式。 根據上述構成，控制複數個像素之極性之極性控制機構 具有使極性反轉之週期互不相同之複數個極性反轉形式。 藉此，各像素中，極性反轉之週期始終變化而非固定。因 此，與極性反轉週期始終固定之情形相比，左眼圖像顯示 時之極性與右眼圖像顯示時之極性之比率，及從左眼圖像 切換為右眼圖像時、從右眼圖像切換為左眼圖像時之圖像 極性之反轉頻率之偏差降低。因此，可實現一種可抑制像 素之殘像及顯示不均而進行顯示之液晶顯示裝置。 [發明之效果] 如上所述，本發明之液晶顯示裝置由於具備：液晶面 板’其包含複數個像素；及極性控制機構，其控制上述複 數個像素；且上述極性控制機構具有使極性反轉之週期互 不相同之複數個極性反轉形式，故發揮可實現可抑制像素 之殘像及顯示不均而進行顯示之液晶顯示裝置之效果》 160473.doc Έ； 201227705 【實施方式】 針對本發明實施之一形態基於圖1〜圖3說明，如下所 述。 圖1係顯示本實施形態之立體顯示系統300之方塊圖。立 體顯不系統300具備液晶顯示裝置1〇〇，及快門眼鏡28〇。 (液晶顯示裝置之構成） 液晶顯示裝置100具備：圖框率控制電路11〇 ;時序控制 器120 ;寫入狀態信號傳送電路13〇;掃描信號驅動電路 140 ;顯示信號驅動電路150 ;背光驅動電路16〇 液晶面 板200，及背光單元25〇。掃描信號驅動電路14〇亦稱為閘 極驅動器，顯示信號驅動電路15〇亦稱為源極驅動器。 液晶面板200具有以複數列及複數行排列成矩陣狀之複 數個像素。典型而言，作為像素係設置有紅色像素、綠色 像素、及藍色像素，由紅色像素、綠色像素、及藍色像素 構成之彩色顯示像素作為任意顏色之顯示單位而發揮功 能。另，彩色顯示像素除了具有紅色、綠色及藍色像素以 外’亦可具有其他像素（例如黃色像素）。此處雖未圖式， 但液晶面板200具備正面基板、背面基板及夾於該 之液晶層。 =，對圖檀率控制電路崎入圖框率6〇如之輸入影 说。例如’輸人影像信號為NTSC信號。圖框率控制 ::2 0基於輸入影像信號而產生比輸入影像信號之圖框 率更兩圖框率之影/金 影像偽唬。由圖框率控制電路U〇201227705 VI. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a stereoscopic display function. [Prior Art] The liquid crystal display device has the advantages of light weight, thinness, and low power consumption, and is used not only as a small display device such as a display portion of a mobile phone but also as a large-sized television. In general, liquid crystal display devices are used for flat display. However, in recent years, it has been proposed to use a liquid crystal display device to perform a more realistic display (see Patent Document 1). Patent Document 1 discloses a stereoscopic image display device (stereoscopic display system) including a liquid crystal display device that alternately displays a left-eye frame and a right-eye frame, and shutter glasses. It is worn by the viewer to view the display of the liquid crystal display device. Fig. 4 is a timing chart showing the frame material disclosed in Patent Document 1 and the control method of the liquid crystal shutter. In the liquid crystal display device of Patent Document 1, the first left-eye frame L i and the second left-eye for the same image as the first left-eye frame L1 are sequentially displayed during the display period of the left-eye image. Frame L2; In the display period of the right-eye image, the first right-eye frame R1, the first right-eye frame, and the second right-eye frame R2 of the same image as R1 are sequentially displayed. At this time, the left-eye shutter of the shutter glasses is controlled by the liquid crystal shutter L signal 108, and the vertical blanking period 2〇5 after being written into the liquid crystal display device from the first left-eye frame L1 to the second thereafter The left eye is opened during the period of frame L2. Further, the right eye shutter of the shutter glasses is subjected to the liquid crystal shutter R control signal 109, and is written in the vertical blanking period 205 after the 160473.doc 201227705 liquid crystal display device is written from the first right eye frame R1 to the subsequent 2 The right eye is opened during the period of frame R2. Therefore, in the stereoscopic image display device of Patent Document 1, in order to prevent the viewer from simultaneously viewing the crosstalk caused by the left-eye frame and the right-eye frame, the viewer can extend the left-eye frame and the right eye. During the use of the frame, it is sought to increase the brightness. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2009-232249 (published on Oct. 8, 2009). According to the stereoscopic display system of Patent Document 1, in order to display one left-eye frame (left-eye image), the liquid crystal display device displays two frames, and displays one right-eye frame ( In the right eye image), the liquid crystal display device displays two frames, and the liquid crystal display device displays four frames in order to allow the viewer to visually recognize one stereoscopic image. In this case, in order for the viewer to recognize the stereoscopic image dynamically displayed, it is necessary to drive the liquid crystal display device at a high vertical scanning frequency. In the case where the liquid crystal display device is driven at a frequency as it is, the period during which each pixel is selected is shortened, so that the influence of the signal delay is large, and the luminance of the pixel may not reach a specific value. Therefore, in the case of a general liquid crystal display device, the polarity of the pixel is inverted every frame, and in order to make the brightness of the pixel reach a specific brightness, it is necessary to display the image for the right eye in the frame of the left eye image. Like the 2 frame period 160473.doc 201227705 'maintains the same pixel polarity. In this case, when the pixel polarity is the same during the two frame periods and the pixel polarity is reversed in two frame periods, the pixel polarity when the left eye image is displayed and the pixel polarity when the right eye image is displayed are displayed. Each of them is fixed without change, and a pixel afterimage may be generated due to the left and right image data. In the case where the pixel polarity is reversed by the 4-frame period, only one of the right eye images is switched to the left eye image or the left eye image is switched to the right eye image. The polarity is always reversed, resulting in different images seen from the left and right. Further, in the case where the pixel polarity is reversed at a period of six or more frames, since the period in which the pixels maintain the same polarity is long, flicker occurs. This will be specifically described with reference to FIG. 5. Fig. 5 U) shows a graph of the polarity of each pixel of the liquid crystal panel in the case where the pixel polarity is reversed every two frames. Further, Fig. 5(b) is a view showing the polarity of each pixel of the liquid crystal panel in the case where the pixel polarity is reversed every four frames. In FIGS. 5(a) and 5(b), "+" and "_" described in the squares indicate that the pixel polarity is positive polarity and negative polarity, and the pixel polarities adjacent to each other in the row direction and the column direction are different from each other. The way it is configured. In Fig. 5(a), if attention is paid to the pixel at the top left corner, when the left eye image of the fifth frame, the sixth frame, and the ninth frame of the third frame is displayed, The pixel polarity is always displayed as the positive polarity, while in the third frame, the fourth frame, the seventh frame, and the eighth frame, the pixel polarity is always displayed as the negative polarity. That is, each pixel in the left eye image display always shows the same polarity, and each pixel in the right eye image display always shows the same polarity. At this time, for example, the liquid crystal panel is a panel of the black matrix display mode, and if the pixel 1·50473. is displayed in the image of the right eye, the display pixel is always in the minimum state, since the pixel is always only in the positive polarity. If there is a change in the range, pixel residual images will be generated. In this case, when the pixel polarity is continuously inverted in the frame period of 2, the residual image of the pixel may be generated due to the pixel data to be displayed. (b) If you look at the pixel in the top left corner, the left eye image and the right eye image of the jade frame to the fourth frame all show positive polarity, and the left frame of the $ frame to the eighth frame Both the eye image and the right eye image show a negative polarity, and the ninth frame returns to the positive polarity again. The polarity of the pixel changes from positive to negative when it is converted to the fifth frame in the fourth frame, and is shown in Fig. 8. When the frame is changed to the ninth frame, the negative inversion is positive, but it can be seen that in either case, the polarity of the pixel is reversed when switching from the right eye image to the left eye image. Therefore, the pixel polarity is continuously 4 In the case where the frame period is reversed, the inversion timing of the pixel polarity becomes solid. When switching from the right eye image to the left eye image, or from the left eye image to the right eye image, the result is that the left eye image and the right eye image look different. The input image signal of the device is 6 〇 fps or less, and it is expanded into two frames for the left eye image and two frames for the right eye image. When the total number of frames is 4, the cycle is 6 frames or more. In the case of inverting the polarity of the pixel, the inversion frequency of the pixel polarity is 4 Hz or less, and there is a possibility that the jump phenomenon of the so-called flicker display due to the polarity inversion of the pixel occurs. Thus, if the polarity of the pixel is always reversed with a certain period In the case of each pixel, 'the polarity of the image displayed by the left eye and the polarity of the image of the right eye are always fixed at each time', so that the pixel afterimage is generated, or only the image from the right eye is switched to The left eye image and the left eye image are switched to the right eye image. 160473.doc 201227705 The polarity is reversed when switching either side, so the left eye image and the right eye image look different. The invention is completed to solve the above problems. The object of the present invention is to provide a liquid crystal display device and a stereoscopic display system capable of suppressing the image of the residual image and the display unevenness of the pixel. [Technical Solution to Problem] In order to solve the above problem, the liquid crystal display device of the present invention includes a liquid crystal panel. And comprising a plurality of pixels; and a polarity control mechanism that controls polarity of the plurality of pixels; wherein the polarity control mechanism has a plurality of polarity inversion patterns in which periods of polarity inversion are different from each other. The polarity control mechanism for controlling the polarity of a plurality of pixels has a plurality of polarity inversion patterns in which the periods of polarity inversion are different from each other. Thereby, the period of polarity inversion in each pixel is always changed rather than fixed. When the inversion period is always fixed, the ratio of the polarity of the left eye image to the polarity of the right eye image is displayed, and when switching from the left eye image to the right eye image, and from the right eye image The deviation of the inversion frequency of the image polarity at the time of the left eye image is lowered. Therefore, it is possible to realize a liquid crystal display device which can suppress display of residual images and display unevenness of pixels. [Effects of the Invention] As described above, the liquid crystal display device of the present invention includes: a liquid crystal panel including a plurality of pixels; and a polarity control mechanism that controls the plurality of pixels; and the polarity control mechanism has a polarity inversion Since the plurality of polarity inversion patterns having different periods are different from each other, the effect of the liquid crystal display device capable of suppressing the residual image and display unevenness of the pixel can be realized. 160473.doc Έ; 201227705 [Embodiment] One embodiment will be described based on Fig. 1 to Fig. 3 as follows. Fig. 1 is a block diagram showing a stereoscopic display system 300 of the present embodiment. The stereoscopic display system 300 includes a liquid crystal display device 1 and shutter glasses 28A. (Configuration of Liquid Crystal Display Device) The liquid crystal display device 100 includes a frame rate control circuit 11A, a timing controller 120, a write state signal transfer circuit 13A, a scan signal drive circuit 140, a display signal drive circuit 150, and a backlight drive circuit. 16" LCD panel 200, and backlight unit 25". The scan signal drive circuit 14 is also referred to as a gate driver, and the display signal drive circuit 15 is also referred to as a source driver. The liquid crystal panel 200 has a plurality of pixels arranged in a matrix in a plurality of columns and a plurality of rows. Typically, a red pixel, a green pixel, and a blue pixel are provided as a pixel system, and a color display pixel composed of a red pixel, a green pixel, and a blue pixel functions as a display unit of an arbitrary color. In addition, the color display pixels may have other pixels (e.g., yellow pixels) in addition to the red, green, and blue pixels. Although not illustrated here, the liquid crystal panel 200 includes a front substrate, a rear substrate, and a liquid crystal layer interposed therebetween. =, for the figure of the rate control circuit, the frame rate is 6 as the input shadow said. For example, the input image signal is an NTSC signal. Frame rate control ::2 0 based on the input image signal, the frame rate of the input image signal is more than two frame rate / gold image pseudo-唬. Frame rate control circuit U〇
之影像信號之圖框率為特定值，故該處理亦稱作FRC 160473.doc 201227705 (Frame Rate Control ·圖框率控制）。一般電視裝置所顯示 之輪入影像信號中所含之相當於1秒之圖場數為6〇，該輸 入影像信號之圖框率記為60 fps(frames per sec〇nd:每秒 圖樞數）。 例如，圖框率控制電路110基於圖框率6〇 fps之輸入影像 信號而產生圖框率120 fps之影像信號。液晶顯示裝置1〇〇 具有··進行立體顯示之立體顯示模式；及進行平面顯示之 平面顯示模式；如為立體顯示模式之情形，影像信號中包 含應以立體顯示模式顯示之圖像資料。又，如為平面顯示 模式之情形’影像信號中包含應以平面顯示模式顯示之圖 像資料。又，如為影像信號以BD規格等記為24p之情形， 在被輸入至圖框率控制電路110之前，例如進行2_3之下拉 轉換，而對圖框率控制電路110輸入圖框率6〇印3之輸入影 像k號。然而，除了輸入6〇 fpS以外，亦會輸入如5〇 fpS、 48 fps等之影像信號。 時序控制器120係控制寫入狀態信號傳送電路13〇、掃描 信號驅動電路140'顯示信號驅動電路15〇、及背光驅動電 路160 »時序控制器12〇基於影像信號而產生顯示信號，且 將顯示信號輸出至顯示信號驅動電路丨50。影像信號包含 應以立體顯示模式顯示之圖像資料之情形時，時序控制器 120將左眼用圖像資料擴展為2個圖框，將右眼用圖像資料 擴展為2個圖框，且將顯示信號之圖框率設定為24〇 fps。 此時’第一圖框之左眼用圖像與第2圖框之左眼用圖像、 及第1圖框之右眼用圖像與第2圖框之右眼用圖像可分別為 160473.doc 201227705 相同圖像，亦可為I PJ圓 1為不同圖像以進行過驅動等。又，若影像 L號L 3應以平面顯示模式顯示之圖像資料之情形時，時 序控制器120將顯不信號之圖框率設定為12〇印$。 。以此方式，時序控制器12晴應㈣示模式而使顯示信 號之圖框率改變^掃描信號驅動電路Μ㈣供給擇描作 號’該掃描信號選擇進行液晶面板2〇〇之像素寫入。㈣ 信號驅動電路15G係將顯示信號供給至液晶面板細之所選 擇之像素號驅動電路14G及顯示信號驅動電路 係以對應於顯示信號圖框率之垂直掃描頻率而驅動液晶面 板2〇γ如此，藉由時序控制器120對應於顯示模式而使顯 示信號之圖框率改變，可使液晶面板200之垂直掃描頻率 對應於顯示模式而改變。 貫施φ態中’液晶顯示裝置1〇〇具有立體顯示功能， 顯示信號驅動電路150在進行立體顯示時，每2個連續之垂 直掃描期間將左眼圖像資料及右眼圖像資料交替寫入複數 個像素之各者。 又’時序控制器120具備極性控制電路丨21。極性控制電 路121係輸出用以進行液晶面板2〇〇中之複數個像素之極性 控制之極性控制信號者，相當於申請專利範圍中之極性控 制機構。極性控制之詳細内容將於後述。 寫入狀態信號傳送電路130係將表示立體顯示模式中之 複數個像素之寫入狀態的寫入狀態信號發送至快門眼鏡 280。 [快門眼鏡之構成] 160473.doc -10- 201227705 快門眼鏡280亦稱為主動式眼鏡，其具有左眼快門與右 眼快門。液晶顯示裝置100顯示左眼圖像之情形時，寫入 狀態信號表示左眼圖像之顯示，快門眼鏡28〇之左眼快門 打開’右眼快門關閉。液晶顯不裝置1 〇 〇顯示右眼圖像之 情形時，寫入狀態信號表示右眼圖像之顯示，快門眼鏡 280之右眼快門打開’左眼快門關閉。因此，配戴快門眼 鏡280之觀看者可僅以左眼觀看液晶顯示裝置100顯示之左 眼用圖像，且僅以右眼觀看液晶顯示裝置1〇〇顯示之右眼 用圖像。 又’背光驅動電路160係驅動背光單元250。藉此，背光 單元250自液晶面板2〇〇之背面照射光。 [像素之極性控制] 其次，參照圖2及圖3 ’對液晶面板200中之像素之極性 控制加以說明。液晶面板200中之複數個像素之極性係基 於時序控制器120之極性控制電路121所輸出之極性控制信 號’且由顯示信號驅動電路150驅動上述複數個像素之各 者而決定。另’本實施形態中，像素之極性意指將對液晶 面板200之各像素共通設置之共用電極之電位為基準之像 素電極之電位極性。 極性控制電路121係以於寫入左眼圖像資料之2個垂直掃 描期間與寫入右眼圖像資料之2個垂直掃描期間内使像素 極性成為相同之方式，控制複數個像素之極性。再者，.極 性控制電路121具有使極性反轉之週期互不相同之複數個 極性反轉形式。極性反轉形式包含：每2個垂直掃描期間 J60473.doc 201227705 反轉極性之極性反轉形式（每2個圖框之極性反轉、第1極 性判定形式）；及每個4垂直掃描期間反轉極性之極性反轉 形式（每4個圖框之極性反轉、其他極性判定形式）。 首先參照圖2，針對將每2個圖框之極性反轉作為基本動 作，於其間插入每4個圖框之極性反轉之技術加以說明。 圖2中圖框編號之項目表示目前為第幾圖框，在視差圖像 之項目中「L」、「R」之記號分別表示左眼用圖像與右眼用 圖像。在像素極性之項目中「+」、「_」之記號表示在著眼 於液晶面板200上之像素時，該像素各自為正極性還是負 極性。 首先從第1圖框至第η-1之圖框係以2圖框週期反轉像素 極性’在左眼圖像時顯示正極性，在右眼圖像時顯示負極 性。其次從第η圖框至第η+3圖框之4圖框期間保持相同極 性，且在第η+4圖框以後，再次成為每2個圖框反轉極性。 藉此’第η+4圖框以後’在左眼圖像時顯示負極性，在 右眼圖像時顯示正極性，且第1圖框至第η_ 1圖框相對於左 眼圖像、右眼圖像之極性反轉。即，若比較第1圖框（先前 之起始圖框）與第η+4圖框（之後之起始圖框），則像素極性 相同，但視差圖像不同。 又’在圖2中，自第η-2圖框至第η+1圖框，將4個圖框期 間保持相同極性（+極性）、且在第η+2圖框以後再次成為每 2個圖框反轉極性之情形’亦是在第η+2圖框以後，於左眼 圖像時顯示負極性、於右眼圖像時顯示正極性。即，若比 較第1圖框（先前之起始圖框）與第η+2圖框（之後之起始圖 160473.doc -12- 201227705 框），則視差圖像相同，但像素極性不同。 如此’由於先前之起始圖框與之後之起始圖框，其視差 圖像及像素極性之任一者不相同，故將每2個圖框之極性 反轉動作作為基本動作時，藉由在其間插入以4個圖框進 行極性反轉之極性反轉形式’可降低左眼圖像、右眼圖像 中之像素極性之偏差。 又’圖2中’在插入4個圖框週期之極性反轉形式時，包 含切換極性反轉形式時之極性反轉在内僅進行1次極性反 轉，但即使是包含切換極性反轉形式時之極性反轉在内進 行連續3次以上之奇數次4圖框週期之反轉，亦可同樣消除 極性偏差。即，在插入之極性反轉形式中，包含切換極性 反轉形式時之極性反轉在内進行奇數次極性反轉後，切換 極性反轉开> 式。藉此’在先前之起始圖框與之後之起始圖 框’由於可使視差圖像及像素極性之任一者不同，故可降 低左眼圖像、右眼圖像中之像素極性之偏差。 其次，參照圖3 ’針對將每4個圖框之極性反轉作為基本 動作’於其間插入每2個圖框之極性反轉之技術加以說 明。 首先從第1圖框至第η-1之圖框係以4個圖框週期反轉像 素極性’且像素極性之反轉係在自右眼圖像切換為左眼圖 像時進行。其次將第η圖框至第η+1圖框之2圖框期間保持 相同極性，且在第η+2圖框以後，再次成為每4個圖框反轉 極性。藉此，第η+2圖框以後，在從左眼圖像切換為右眼 圖像時進行像素極性反轉，與第丨圖框至第nq圖框成相反 160473.doc •13- 201227705 之關係》 又’在圖3中’將第n_4圖框至第n_3圖框之2圖框期間保 持相同極性（正極性）、且在第η_2圖框以後再次以每4個圖 框反轉極性之情形’亦是在第η-2圖框以後，從左眼圖像 切換為右眼圖像時進行像素極性之反轉。 藉此’將每4個圖框之極性反轉動作作為基本動作時， 藉由於其間插入2圖框之極性反轉，可降低像素極性反轉 時序中右眼圖像、左眼圖像之偏差。 圖3中’插入2圓框週期之極性反轉形式時，雖成為包含 切換極性反轉形式時之極性反轉在内僅進行1次極性反 轉’但即使是包含切換極性反轉形式時之極性反轉在内以 2圖框週期進行連續3次以上之奇數次反轉，亦可同樣降低 極性之偏差。 在圖2及圖3中’在作為基本之極性反轉週期以外插入其 他極性反轉形式之時序，可定期於每個預先決定之圖框插 入’亦可隨機插入。即，從作為基本之極性反轉形式切換 至其他極性反轉形式之週期可為固定，亦可不規則。 作為隨機插入其他極性反轉形式之技術，有藉由在時序 控制器120之R〇M或暫存器等中儲存隨機數列，基於其而 產生隨機數來產生隨機模式之方法，或在時序控制器12〇 内 s又置以 LFSR(Linear Feedback Shift Register:線性反馈 移位暫存器）為代表之隨機數產生電路，且基於藉由隨機 數產生電路產生之隨機數列來產生隨機模式之方法。 [極性控制之變形例] 160473.doc • 14- 201227705 又’作為基本之像素極性反轉週期未特別規定，即使是 切換複數種反轉週期亦可消除極性之偏差。即，複數個極 性反轉形式之切換順序亦可為不規則。例如，使用上述任 一隨機數列生成方法來生成ibit單位之隨機數值，且指派 為若隨機數值為0則以4圖框反轉像素極性，若隨機數值為 1則以2圖框反轉像素極性，只要在每次像素極性反轉時更 新隨機數值’則可消除像素極性之偏差。該情形下，較好 為在各極性控制形式中，包含切換極性反轉形式時之極性 反轉在内進行1次以上之極性反轉後，進行極性反轉形式 之切換。 另’複數個極性反轉形式之切換順序亦可為規則性。 又’本實施形態中，極性控制電路121雖具有每2個垂直 掃描期間反轉極性之極性反轉形式，及每4個垂直掃描期 間反轉極性之極性反轉形式，但並不限定於此，亦可具有 每1個垂直掃描期間反轉極性之極性反轉形式，或每6個垂 直掃描期間反轉極性之極性反轉形式。 以任一方法插入作為基本極性反轉週期以外之極性反轉 週期之情形下亦較好為使以下之偏差消除：（1)左眼圖像顯 示時正極性與負極性之發生比率、（2)右眼圖像顯示時正極 性與負極性之發生比率、（3)圖像顯示期間整體之正極性與 負極性之發生比率、及（4)自左眼圖像切換至右眼圖像、與 自右眼圖像切換至左眼圖像時之像素極性之反轉頻率。 本實施形態中’顯示信號驅動電路150構成為，在進行 立體顯示時’每2個連續之垂直掃描期間將左眼圖像資料 160473.doc •15- 201227705 及右眼圖像資料交替寫入複數個像素之各者，但亦可構成 為，於每1個垂直掃描期間内將左眼圖像資料及右眼圖像 資料交替寫入。 本實施形態中，極性控制電路121構成為，在左眼圖像 資料及右眼圖像資料之一方被寫入複數個像素之全體時， 以複數個像素中鄰接於列方向及行方向之像素之極性互不 相同之方式’控制複數個像素之極性，但並不限定於此。 例如’極性控制電路121亦可在左眼圖像資料及右眼圖像 資料之一方被寫入複數個像素之全體時，以複數個像素中 鄰接於行方向之像素之極性彼此相同之方式，控制複數個 像素之極性》 [藉由軟體實施之本發明] 又’上述液晶顯示裝置100之各區塊、特別是極性控制 電路121可藉由硬體邏輯構成，亦可如下所述，使用CPU 而藉由軟體實現。 即’液晶顯示裝置100具備：CPU(central Processing Unit :中央處理器），其執行用以實現各功能之控制程式之 命令；R0M(read only memory :唯讀記憶體）’其儲存上 述程式，RAM(random access memory :隨機存取記憶 體）’其展開上述程式；及記憶體等記憶裝置（記錄媒體） 等’其儲存上述程式及各種資料。且，本發明之目的亦可 藉由以下方式達成：將記錄有可由電腦讀取之用以實現上 述功能之軟體即液晶顯示裝置1〇〇之控制程式之程式碼（可 執行程式、中間碼程式 '源程式）的記錄媒體供給至上述 160473.doc 201227705 液晶顯示裝置H)0,由該電腦（或cpu' Mpu)讀出記錄媒體 中δ己錄之程式竭並執行。 作為上述記錄媒體，例如可使用磁帶、卡式磁帶等之磁 帶系統’·包含軟碟（註冊商標）/硬碟等之磁碟或cd_ R〇M/M〇/MD/DVD/CD_R等之光碟的磁碟系統；防（包含 記隐體卡）/光卡等之卡片系統；或遮罩式ROM/EPR⑽/ EEPROM/快閃Rqm等之半導體記憶體系統等。 又，亦可構成為將液晶顯示裝置1〇〇與通信網路連接， 而可經由通信網路供給上述程式碼。作為該通信網路係未 特別限定’例如’可利用網際網路、内部網路、商際網 路.、LAN、ISDN、VAN、CATV通信網路、虛擬專用網路 (vmual pnvate netw〇rk)、電話線網路行動通信網路、 及衛星通信網路等。又’作為構成通信網路之傳送媒體未 特別限定’例如可利用臟1394、㈣、電力線傳輸、 環纜迴路、電話線、及ADSL迴路等有線線路，亦可利 用IrDA或遙控等之紅外線、黯㈣（藍牙，註冊商標）、 8〇2.U無線、HDR(high data rate :高資料傳輸速率）、行動 電話網路、化星迴路、及地波數位網路等無線線路。另本 發明亦可藉由以電子傳送而實現上述程式碼、即於載波中 肷入電腦資料信號之形態來實現。 [附記事項] 本發明並非限定^上述實施形態，可在請求項所示範圍 内進仃各種變更。#，關於在請求項所示範圍内組合經適 當變更之技術方案之實施形態，亦涵蓋於树明之技術範 160473.doc -17· 201227705 圍内。 本發明之液晶顯示裝置亦可為，上述極性反轉形式中包 含於每個第1垂直掃描期間反轉極性之第1極性反轉形式， 上述極性控制機構係交替切換第1極性反轉形式與第1極性 反轉形式以外之其他極性反轉形式，且自第1極性反轉形 式切換為第1極性反轉形式以外之其他極性反轉形式之週 期為固定》 本發明之液晶顯示裝置亦可為，上述極性反轉形式中包 含於每個第1垂直掃描期間反轉極性之第1極性反轉形式， 上述極性控制機構係交替切換第1極性反轉形式與第1極性 反轉形式以外之其他極性反轉形式，且自第1極性反轉形 式切換為第1極性反轉形式以外之其他極性反轉形式之週 期為不規則。 本發明之液晶顯示裝置亦可為，上述極性控制機構在各 極性控制形式中，進行1次以上之極性反轉後，進行極性 反轉形式之切換》 本發明之液晶顯示裝置亦可為，上述極性反轉形式之切 換順序為規則性》 本發明之液晶顯示裝置亦可為，上述極性反轉形式之切 換順序為不規則性。 本發明之液晶顯示裝置較好為具有立體顯示功能，且具 備將用以顯示圖像之圖像資料寫入上述複數個像素之信號 驅動電路，上述顯示信號驅動電路於進行立體顯示時，每 2個連續之垂直掃描期間將左眼圖像資料及右眼圖像資料 160473.doc 201227705 交替寫入上述複數個像素之各者，上述極性控制機構係以 使各像素之極性在寫入上述左眼圖像資料之上述2個垂直 掃描期間與寫入上述右眼圖像資料之上述2個垂直掃描期 間之各者中成為相同之方式，控制上述複數個像素之極 性。 根據上述構成’在進行立體顯示時，每2個連續之垂直 掃描期間將左眼圖像資料及右眼圖像資料交替寫入上述複 數個像素之各者，且各像素之極性在寫入上述左眼圖像資 料之上述2個垂直掃描期間與寫入上述右眼圖像資料之上 述2個垂直掃描期間之各者中相同。藉此，可防止觀看者 同時視認左眼用圖框及右眼用圖框所造成之串擾。又，由 於觀看者可視認左眼用圖框及右眼用圖框之期間延長，故 可謀求亮度增加。 本發明之液晶顯示裝置亦可為，第丨極性反轉形式係每2 個垂直掃描期間反轉極性之極性反轉形式，上述其他極性 反轉形式係每4個垂直掃描期間反轉極性之極性反轉形 式，或亦可為，第1極性反轉形式係每4個垂直掃描期間反 轉極性之極性反轉形式，上述其他極性反轉形式係每2個 垂直掃描期間反轉極性之極性反轉形式。 根據上述構成，可抑制以丨圖框使像素極性反轉之情形 時產生之亮度下降，或以6圖框使像素極性反轉之情形時 產生之閃爍。 本發明之液晶顯示裝置較佳為，上述極性控制機構在藉 由上述其他極性反轉形式控制極性之情形時，包含切換極 160473.doc -19- 201227705 性反轉形式時之極性反轉在内進行奇數次極性反轉後，切 換為第1極性反轉形式。 根據上述構成，若將藉由切換至其他極性反轉形式前之 第1極性反轉形式進行之極性控制中之最初之圖框作為先 前之起始圖框，且將藉由切換至其他極性反轉形式後之第 1極性反轉形式進行之極性控制中之最初之圖框作為之後 之起始圖框’則在第1極性反轉形式及其他極性反轉形式 分別以每2個垂直掃描期間及每4個垂直掃描期間反轉極性 之極性反轉形式之情形下，在先前之起始圖框與之後之起 始圖框中，視差圖像及像素極性之任一者不相同。因此， 可降低左眼圖像顯示時之極性與右眼圖像顯示時之極性之 比率偏差。又’在第1極性反轉形式及其他極性反轉形式 分別以每4個垂直掃描期間及每2個垂直掃描期間反轉極性 之極性反轉形式之情形下，像素極性反轉時之切換前之視 差圖像’在藉由切換至其他極性反轉形式前之第1極性反 轉形式進行極性控制時，與藉由切換至其他極性反轉形式 後之第1極性反轉形式進行極性控制時不同。因此，可使 左眼圖像切換至右眼圖像時，與從右眼圖像切換至左眼圖 像時之像素極性之反轉頻率之偏差降低。 本發明之液晶顯示裝置較佳為，上述複數個像素係排列 成複數列及複數行之矩陣狀，且上述極性控制機構係在上 述左眼圖像資料及上述右眼圖像資料之一方被寫入上述複 數個像素之全體時，以使上述複數個像素中鄰接於列方向 及行方向之像素之極性互不相同之方式，控制上述複數個 160473.doc •20- 201227705 像素之極性。 根據上述構成，可抑制閃爍及亮斑。 本發明之液晶顯示裝置亦可為，上述複數個像素係排列 成複數列及複數行之矩陣狀，且上述極性控制機構在上述 左眼圖像資料及上述右眼圖像資料之一方被寫入上述複數 個像素之整體時，以使上述複數個像素中鄰接於行方向之 像素極性彼此相同之方式，控制上述複數個像素之極性。 本發明之立體顯示系統之特徵在於具備：上述任一者之 液晶顯示裝置；及快門眼鏡，其具有左眼快門及右眼快 門；且上述左眼快門係在寫入上述左眼圖像資料之期間打 開，上述右眼快門係在寫入上述右眼圖像資料之期間打 開。 根據上述構成，液晶顯示裝置之觀看者可觀看立體影 像。 又’作為上述液晶顯示裝置之上述極性控制機構，使電 腦動作之控制程式、及記錄該控制程式且為電腦可讀取之 記錄媒體亦涵蓋於本發明之技術範圍内。 另，本發明係亦可以如下形式表現。 即，本發明之液晶顯示裝置係在設置有複數個像素之液 晶顯示裝置中，上述複數個像素之各者在1以上之垂直掃 描期間内顯示相同之極性，且具有2種以上之極性反轉之 週期。 又，較佳為上述複數個像素之各者將每某垂直掃描期間 内之極性反轉動作作為基本動作，且定期產生以與上述基 160473.doc -21- 201227705 本動作時之極性反轉週期不同之週期的極性反轉，且以與 上述基本動作時不同之週期連續進行1次以上極性反轉。 又’較佳為上述複數個像素之各者將每某垂直掃描期間 内之極性反轉動作作為基本動作，且隨機產生以與上述基 本動作時之極性反轉週期不同之週期的極性反轉，以與上 述基本動作時不同之週期連續進行1次以上極性反轉。 又’較佳為針對上述複數個像素之各者，每當反轉極性 1次以上則交替切換複數種之極性反轉之週期。 又’較佳為在上述複數種極性反轉週期中，從某極性反 轉週期切換至其他極性反轉週期時，藉由預先決定之模 式’選擇切換之極性反轉週期。 又’較佳為在上述複數種極性反轉週期中，從某極性反 轉週期切換至其他極性反轉週期時，隨機選擇切換之極性 反轉週期。 又’較佳為上述液晶顯示裝置具有立體顯示功能，在進 行立體顯示時，每2個連續之垂直掃描期間將左眼圖像資 料及右眼圖像資料交替寫入上述複數個像素之各者，且上 述複數個像素之各者在寫入上述左眼圖像資料之上述2垂 直掃描期間内顯示相同極性，在寫入上述右眼圖像資料之 上述2垂直掃描期間内顯示相同極性。 又’較佳為上述複數個像素係排列成複數列及複數行之 矩陣狀’且於上述左眼圖像資料及上述右眼圖像資料之一 方被寫入上述複數之像素之整體時，鄰接於上述複數個像 素中之行方向之像素的極性彼此相同。 160473.doc -22· 201227705 又’較佳為上述複數之像素係排列成複數列及複數行之 矩陣狀’且於上述左眼圖像資料及上述右眼圖像資料之一 方被寫入上述複數之像素之整體時，鄰接於上述複數個像 素中之列方向及行方向之像素的極性互不相同。 [產業上之可利用性] 本發明特別適用於可顯示立體影像之液晶顯示裝置。 【圖式簡單說明】 圖1係顯示本發明之實施形態之立體顯示系統之方塊 圖。 圖2係顯示像素極性控制之一例之圖。 圖3係顯示像素極性控制之其他例之圖。 圖4係顯示先前構成中圖框資料及液晶快門之控制方式 之時序圖。 圖5(a)係顯示每2圖框反轉像素極性之情形下液晶面板之 各像素極性之圖；（b)係顯示每4圖框反轉像素極性之情形 下液晶面板之各像素之極性之圖。 【主要元件符號說明】 100 液晶顯示裝置 108 液晶快門L控制信號 109 液晶快門R控制信號 110 圖框率控制電路 120 時序控制器 121 極性控制電路（極性控制機構） 130 寫入狀態信號傳送電路 ]60473.doc .23· 201227705 140 掃描信號驅動電路 150 顯示信號驅動電路 160 背光驅動電路 200 液晶面板 205 垂直消隱期間 250 背光單元 280 快門眼鏡 300 立體顯示系統 160473.doc -24-The frame rate of the image signal is a specific value, so the process is also called FRC 160473.doc 201227705 (Frame Rate Control • Frame Rate Control). Generally, the number of fields corresponding to one second contained in the round image signal displayed by the television device is 6 〇, and the frame rate of the input image signal is 60 fps (frames per sec nd: ). For example, the frame rate control circuit 110 generates an image signal having a frame rate of 120 fps based on the input image signal at a frame rate of 6 〇 fps. The liquid crystal display device 1 has a stereoscopic display mode for stereoscopic display and a flat display mode for performing flat display; and in the case of a stereoscopic display mode, the image signal includes image data to be displayed in a stereoscopic display mode. Further, in the case of the flat display mode, the image signal includes image data to be displayed in the flat display mode. Further, in the case where the video signal is written as 24p in the BD standard or the like, before being input to the frame rate control circuit 110, for example, 2_3 pull-down conversion is performed, and the frame rate control circuit 110 is input with a frame rate of 6 frames. 3 input image k number. However, in addition to inputting 6〇 fpS, image signals such as 5〇 fpS, 48 fps, etc. are also input. The timing controller 120 controls the write state signal transmission circuit 13A, the scan signal drive circuit 140' display signal drive circuit 15A, and the backlight drive circuit 160 » the timing controller 12 to generate a display signal based on the image signal, and will display The signal is output to the display signal driving circuit 丨50. When the image signal includes image data to be displayed in the stereoscopic display mode, the timing controller 120 expands the image data for the left eye into two frames, and expands the image data for the right eye into two frames, and Set the frame rate of the display signal to 24〇fps. At this time, the left eye image of the first frame and the left eye image of the second frame, the right eye image of the first frame, and the right eye image of the second frame may be respectively 160473.doc 201227705 The same image, can also be I PJ circle 1 for different images for overdrive. Further, if the image L number L 3 should be displayed in the flat display mode, the timing controller 120 sets the frame rate of the display signal to 12 prints $. . In this manner, the timing controller 12 changes the frame rate of the display signal to change the scanning signal driving circuit Μ (4) to supply the selected image. The scanning signal selects the pixel writing of the liquid crystal panel 2 . (4) The signal driving circuit 15G supplies the display signal to the liquid crystal panel. The selected pixel number driving circuit 14G and the display signal driving circuit drive the liquid crystal panel 2? γ in accordance with the vertical scanning frequency of the display signal frame rate. By changing the frame rate of the display signal in accordance with the display mode by the timing controller 120, the vertical scanning frequency of the liquid crystal panel 200 can be changed corresponding to the display mode. In the φ state, the liquid crystal display device 1 has a stereoscopic display function, and when the display signal driving circuit 150 performs stereoscopic display, the left eye image data and the right eye image data are alternately written every two consecutive vertical scanning periods. Enter each of a number of pixels. Further, the timing controller 120 is provided with a polarity control circuit 丨21. The polarity control circuit 121 outputs a polarity control signal for performing polarity control of a plurality of pixels in the liquid crystal panel 2, and corresponds to a polarity control mechanism in the patent application. The details of the polarity control will be described later. The write status signal transmission circuit 130 transmits a write status signal indicating a write state of a plurality of pixels in the stereoscopic display mode to the shutter glasses 280. [Configuration of Shutter Glasses] 160473.doc -10- 201227705 Shutter glasses 280, also referred to as active glasses, have a left eye shutter and a right eye shutter. When the liquid crystal display device 100 displays the image of the left eye, the write status signal indicates the display of the left eye image, and the left eye shutter of the shutter glasses 28 opens. The right eye shutter is closed. The liquid crystal display device 1 〇 情形 When the right eye image is displayed, the write status signal indicates the display of the right eye image, and the right eye shutter of the shutter glasses 280 is opened. The left eye shutter is closed. Therefore, the viewer wearing the shutter eyeglass 280 can view the left-eye image displayed by the liquid crystal display device 100 with only the left eye, and view the right-eye image displayed by the liquid crystal display device 1〇〇 only with the right eye. Further, the backlight driving circuit 160 drives the backlight unit 250. Thereby, the backlight unit 250 irradiates light from the back surface of the liquid crystal panel 2A. [Pixel Polarity Control] Next, the polarity control of the pixels in the liquid crystal panel 200 will be described with reference to Figs. 2 and 3'. The polarity of the plurality of pixels in the liquid crystal panel 200 is determined based on the polarity control signal '' output from the polarity control circuit 121 of the timing controller 120 and driven by the display signal drive circuit 150 to drive each of the plurality of pixels. In the present embodiment, the polarity of the pixel means the potential polarity of the pixel electrode based on the potential of the common electrode which is commonly provided for each pixel of the liquid crystal panel 200. The polarity control circuit 121 controls the polarity of a plurality of pixels so that the pixel polarities are the same in the two vertical scanning periods in which the left eye image data is written and the two vertical scanning periods in which the right eye image data is written. Further, the polarity control circuit 121 has a plurality of polarity inversion patterns in which the periods of polarity inversion are different from each other. The polarity inversion form includes: every 2 vertical scanning periods J60473.doc 201227705 Reverse polarity polarity inversion form (polarity inversion of every 2 frames, first polarity determination form); and each 4 vertical scanning period Polarity polarity inversion form (polarity inversion of every 4 frames, other polarity determination forms). First, referring to Fig. 2, a technique in which the polarity inversion of every two frames is reversed as a basic operation, and the polarity inversion of every four frames is inserted therebetween will be described. The item of the frame number in Fig. 2 indicates that the current frame is the first frame. In the item of the parallax image, the symbols "L" and "R" indicate the image for the left eye and the image for the right eye, respectively. In the item of the pixel polarity, the symbols "+" and "_" indicate whether the pixels are positive polarity or negative polarity when focusing on the pixels on the liquid crystal panel 200. First, from the first frame to the n-1th frame, the pixel polarity is reversed by the 2-frame period, and the positive polarity is displayed in the left-eye image, and the negative polarity is displayed in the right-eye image. Next, the same polarity is maintained from the nth frame to the 4th frame of the η+3 frame, and after the n+4th frame, the polarity is inverted every 2 frames. By this, 'n=4th frame and later' displays negative polarity in the left eye image, positive polarity in the right eye image, and the first frame to the η_1 frame relative to the left eye image, right The polarity of the eye image is reversed. That is, if the first frame (the previous start frame) and the n+4 frame (the subsequent start frame) are compared, the pixel polarities are the same, but the parallax images are different. In addition, in FIG. 2, from the η-2 frame to the η+1 frame, the four frame periods are kept at the same polarity (+polarity), and after the η+2 frame, they become again every two. The case where the frame inverts the polarity 'is also shown that after the n + 2 frame, the negative polarity is displayed in the left eye image and the positive polarity is displayed in the right eye image. That is, if the first frame (the previous start frame) and the n+2 frame (the subsequent start picture 160473.doc -12-201227705 frame) are compared, the parallax images are the same, but the pixel polarities are different. Thus, since the previous start frame and the subsequent start frame are different from each other in the parallax image and the pixel polarity, the polarity inversion operation of each of the two frames is used as the basic action. Inserting the polarity inversion form of polarity inversion in four frames therebetween can reduce the deviation of the pixel polarity in the left eye image and the right eye image. In the 'Fig. 2', when the polarity inversion form of the four frame periods is inserted, only one polarity inversion is performed including the polarity inversion in the case of switching the polarity inversion form, but even the switching polarity inversion form is included. When the polarity is reversed, the inversion of the odd-numbered four-frame period is performed three times or more, and the polarity deviation can be eliminated as well. In other words, in the polarity inversion form of the insertion, the polarity inversion is performed including the polarity inversion in the case of switching the polarity inversion, and then the polarity inversion is switched. By the fact that the 'before the start frame and the start frame after the 'because the difference between the parallax image and the pixel polarity can be different, the pixel polarity in the left eye image and the right eye image can be reduced. deviation. Next, a technique in which the polarity inversion of every four frames is reversed as a basic operation and the polarity inversion of each of the two frames is inserted will be described with reference to Fig. 3'. First, from the first frame to the n-1th frame, the pixel polarity is inverted by four frame periods and the pixel polarity is reversed when the right eye image is switched to the left eye image. Next, the frame period from the η frame to the n+1 frame is kept at the same polarity, and after the η+2 frame, the polarity is inverted every four frames. Therefore, after the n+2th frame, the pixel polarity is reversed when switching from the left eye image to the right eye image, which is opposite to the third frame to the nqth frame. 160473.doc •13-201227705 Relationship" and 'in Figure 3', the same polarity (positive polarity) is maintained during the frame from the nth through the 4th to the nth frame, and the polarity is reversed every 4 frames after the η_2 frame. The case 'is also reversed the pixel polarity when switching from the left eye image to the right eye image after the η-2 frame. By using the polarity inversion operation of each of the four frames as the basic motion, the polarity of the right-eye image and the left-eye image in the pixel polarity inversion timing can be reduced by the polarity inversion of the two frames inserted therebetween. . In FIG. 3, when the polarity inversion form of the two-frame period is inserted, only one polarity inversion is performed including the polarity inversion in the case of switching the polarity inversion form, but even if the switching polarity inversion form is included In the polarity inversion, the odd-numbered inversion is performed three times or more in a period of two frames, and the polarity deviation can be similarly reduced. In Fig. 2 and Fig. 3, the timing of inserting other polarity inversion forms other than the basic polarity inversion period can be periodically inserted into each predetermined frame ‘or randomly inserted. That is, the period from the basic polarity inversion form to the other polarity inversion form may be fixed or irregular. As a technique of randomly inserting other polarity inversion forms, there is a method of generating a random pattern by generating a random number in a R〇M or a register of the timing controller 120, or generating a random pattern based on it, or in timing control The device 12 is further provided with a random number generating circuit represented by a LFSR (Linear Feedback Shift Register), and a random pattern is generated based on a random number sequence generated by the random number generating circuit. [Modification of polarity control] 160473.doc • 14-201227705 Further, the basic pixel polarity inversion period is not particularly specified, and the polarity deviation can be eliminated even if a plurality of inversion periods are switched. That is, the switching order of the plurality of polarity inversion forms may also be irregular. For example, using any of the above random number column generation methods to generate a random number of ibit units, and assigning that if the random value is 0, the pixel polarity is inverted by 4 frames, and if the random value is 1, the pixel polarity is inverted by 2 frames. As long as the random value is updated every time the pixel polarity is reversed, the deviation of the pixel polarity can be eliminated. In this case, it is preferable to switch the polarity inversion form after performing the polarity inversion one or more times including the polarity inversion in the case of switching the polarity inversion form in each polarity control mode. The order in which the plurality of polarity inversion forms are switched may also be regular. Further, in the present embodiment, the polarity control circuit 121 has a polarity inversion form in which the polarity is inverted every two vertical scanning periods, and a polarity inversion form in which the polarity is reversed every four vertical scanning periods, but the polarity is not limited thereto. It is also possible to have a polarity inversion form in which the polarity is reversed every one vertical scanning period, or a polarity inversion form in which the polarity is reversed every six vertical scanning periods. In the case where the polarity inversion period other than the basic polarity inversion period is inserted by any method, it is preferable to eliminate the following deviation: (1) the ratio of the positive polarity to the negative polarity when the left eye image is displayed, (2) The ratio of the positive polarity to the negative polarity when the right eye image is displayed, (3) the ratio of the positive polarity to the negative polarity of the entire image display period, and (4) the switching from the left eye image to the right eye image, The frequency of inversion of the pixel polarity when switching from the right eye image to the left eye image. In the present embodiment, the display signal drive circuit 150 is configured to alternately write the left eye image data 160473.doc • 15-201227705 and the right eye image data into each of the two consecutive vertical scanning periods during stereoscopic display. Each of the pixels may be configured to alternately write left eye image data and right eye image data for each vertical scanning period. In the present embodiment, the polarity control circuit 121 is configured to store pixels adjacent to the column direction and the row direction among a plurality of pixels when one of the plurality of pixels is written in one of the left eye image data and the right eye image data. The manner in which the polarities are different from each other 'controls the polarity of a plurality of pixels, but is not limited thereto. For example, when the polarity control circuit 121 is written in the entirety of a plurality of pixels in one of the left eye image data and the right eye image data, the polarities of the pixels adjacent to the row direction among the plurality of pixels are identical to each other. Controlling the Polarity of a Plural of Pixels" [The present invention by software] Further, each block of the above liquid crystal display device 100, particularly the polarity control circuit 121, may be constituted by hardware logic, or may be used as follows. And by software. In other words, the liquid crystal display device 100 includes a CPU (central processing unit) that executes a command to implement a control program for each function, and a ROM (read only memory) that stores the above program, RAM. (random access memory) is used to expand the above program; and a memory device (recording medium) such as a memory, which stores the above program and various materials. Moreover, the object of the present invention can also be achieved by recording a program code (executable program, intermediate code program) of a control program of a liquid crystal display device that is readable by a computer for realizing the above functions. The recording medium of the 'source program' is supplied to the above-mentioned 160473.doc 201227705 liquid crystal display device H)0, and the computer (or cpu' Mpu) reads out the program of the recorded recording medium and executes it. As the recording medium, for example, a magnetic tape system such as a magnetic tape or a cassette tape, a disk containing a floppy disk (registered trademark)/hard disk, or a disk such as cd_R〇M/M〇/MD/DVD/CD_R can be used. a disk system; a card system such as a (including a hidden card)/optical card; or a semiconductor memory system such as a mask ROM/EPR (10)/EEPROM/flash Rqm. Further, the liquid crystal display device 1A may be connected to the communication network, and the code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, the internal network, the commercial network, the LAN, the ISDN, the VAN, the CATV communication network, and the virtual private network (vmual pnvate netw〇rk) can be utilized. , telephone line network mobile communication network, and satellite communication network. Further, 'the transmission medium constituting the communication network is not particularly limited. For example, a dirty line such as dirty 1394, (4), power line transmission, loop circuit, telephone line, and ADSL circuit can be used, and infrared rays or the like such as IrDA or remote control can be used. (4) (Bluetooth, registered trademark), 8〇2.U wireless, HDR (high data rate), mobile phone network, satellite circuit, and ground wave digital network and other wireless lines. Alternatively, the present invention can be realized by electronically transmitting the above-described code, i.e., by inserting a computer data signal into a carrier wave. [Additional Items] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. #,About the implementation of the technical solution that incorporates the appropriate changes within the scope of the request, is also covered by Shu Ming's technical model 160473.doc -17· 201227705. In the liquid crystal display device of the present invention, the polarity inversion form may include a first polarity inversion form in which the polarity is reversed in each of the first vertical scanning periods, and the polarity control means alternately switches the first polarity inversion form and The polarity inversion form other than the first polarity inversion form, and the period of switching from the first polarity inversion form to the other polarity inversion form other than the first polarity inversion form is fixed. The liquid crystal display device of the present invention may also be used. The polarity inversion form includes a first polarity inversion form in which the polarity is reversed in each of the first vertical scanning periods, and the polarity control means alternately switches the first polarity inversion form and the first polarity inversion form. In the other polarity inversion form, the period from the first polarity inversion form to the other polarity inversion form other than the first polarity inversion form is irregular. In the liquid crystal display device of the present invention, the polarity control means may perform switching of the polarity inversion form after performing polarity inversion once or more in each polarity control mode. The switching order of the polarity inversion form is regular. The liquid crystal display device of the present invention may be such that the switching order of the polarity inversion form is irregular. Preferably, the liquid crystal display device of the present invention has a stereoscopic display function, and has a signal driving circuit for writing image data for displaying an image into the plurality of pixels, and the display signal driving circuit performs stereoscopic display every 2 The left eye image data and the right eye image data 160473.doc 201227705 are alternately written into each of the plurality of pixels during a continuous vertical scanning period, and the polarity control mechanism is configured such that the polarity of each pixel is written in the left eye. The polarities of the plurality of pixels are controlled in such a manner that the two vertical scanning periods of the image data are the same as the two vertical scanning periods in which the right-eye image data is written. According to the above configuration, when stereoscopic display is performed, left eye image data and right eye image data are alternately written into each of the plurality of pixels every two consecutive vertical scanning periods, and the polarity of each pixel is written in the above The two vertical scanning periods of the left eye image data are the same as those of the two vertical scanning periods in which the right eye image data is written. Thereby, the viewer can be prevented from simultaneously visually recognizing the crosstalk caused by the left eye frame and the right eye frame. Further, since the viewer can recognize that the period for the left eye frame and the right eye frame is extended, the brightness can be increased. In the liquid crystal display device of the present invention, the second polarity inversion form may be a polarity inversion form in which the polarity is reversed every two vertical scanning periods, and the other polarity inversion form reverses the polarity of the polarity every four vertical scanning periods. In the inverted form, or the first polarity inversion form is a polarity inversion form in which the polarity is reversed every four vertical scanning periods, and the other polarity inversion forms are reversed in polarity of the polarity inversion every two vertical scanning periods. Transfer form. According to the above configuration, it is possible to suppress the flicker which occurs when the luminance of the pixel is reversed in the case where the pixel polarity is reversed, or when the pixel polarity is reversed by the sixth frame. Preferably, in the liquid crystal display device of the present invention, when the polarity control means controls the polarity by the other polarity inversion form, the polarity inversion is included when the polarity of the switching pole 160473.doc -19-201227705 is reversed. After the odd polarity inversion is performed, the first polarity inversion form is switched. According to the above configuration, the first frame in the polarity control by the first polarity inversion form before switching to the other polarity inversion form is used as the previous start frame, and will be switched to the other polarity. The first frame in the polarity control performed by the first polarity inversion form after the conversion form is used as the subsequent start frame', and the first polarity inversion form and the other polarity inversion patterns are respectively in every two vertical scanning periods. And in the case where the polarity inversion form of the polarity is reversed every four vertical scanning periods, either the parallax image and the pixel polarity are different in the previous start frame and the subsequent start frame. Therefore, the ratio of the polarity of the left eye image display to the polarity of the right eye image display can be reduced. Further, in the case where the first polarity inversion form and the other polarity inversion patterns are reversed in polarity inversion for each of the four vertical scanning periods and every two vertical scanning periods, the pixel polarity is reversed before switching. When the polarity control is performed by the first polarity inversion form before switching to another polarity inversion form, and the polarity is controlled by the first polarity inversion form after switching to another polarity inversion form different. Therefore, when the left-eye image is switched to the right-eye image, the deviation from the inversion frequency of the pixel polarity when switching from the right-eye image to the left-eye image is lowered. Preferably, in the liquid crystal display device of the present invention, the plurality of pixels are arranged in a matrix of a plurality of columns and a plurality of rows, and the polarity control mechanism is written in one of the left eye image data and the right eye image data. When the total number of the plurality of pixels is entered, the polarities of the plurality of pixels 160473.doc • 20-201227705 are controlled such that the polarities of the pixels adjacent to the column direction and the row direction are different from each other. According to the above configuration, flicker and bright spots can be suppressed. In the liquid crystal display device of the present invention, the plurality of pixel systems may be arranged in a matrix of a plurality of columns and a plurality of rows, and the polarity control means is written in one of the left eye image data and the right eye image data. In the case of the entirety of the plurality of pixels, the polarities of the plurality of pixels are controlled such that the polarities of the pixels adjacent to the row direction of the plurality of pixels are identical to each other. The stereoscopic display system of the present invention is characterized by comprising: any one of the above liquid crystal display devices; and shutter glasses having a left eye shutter and a right eye shutter; and the left eye shutter is written in the left eye image data During the period of opening, the right eye shutter is opened during the writing of the right eye image data. According to the above configuration, the viewer of the liquid crystal display device can view the stereoscopic image. Further, as the polarity control means of the liquid crystal display device, a control program for operating a computer and a recording medium for recording the control program and being readable by a computer are also included in the technical scope of the present invention. Further, the present invention can also be expressed in the following form. In other words, in the liquid crystal display device of the present invention, in the liquid crystal display device in which a plurality of pixels are provided, each of the plurality of pixels displays the same polarity in one or more vertical scanning periods, and has two or more polarity inversions. Cycle. Further, it is preferable that each of the plurality of pixels has a polarity inversion operation for each vertical scanning period as a basic operation, and periodically generates a polarity inversion period with the base 160473.doc -21 - 201227705 The polarity of the different periods is reversed, and the polarity inversion is performed one or more times in a cycle different from the above-described basic operation. Further, it is preferable that each of the plurality of pixels has a polarity inversion operation in each vertical scanning period as a basic operation, and randomly generates a polarity inversion in a period different from a polarity inversion period in the basic operation. The polarity inversion is performed one or more times in a cycle different from the above-described basic operation. Further, it is preferable that each of the plurality of pixels is alternately switched between a plurality of periods of polarity inversion each time the polarity is inverted one or more times. Further, it is preferable that, in the plurality of polarity inversion periods, when switching from a certain polarity inversion period to another polarity inversion period, the polarity inversion period of the switching is selected by a predetermined mode. Further, it is preferable that the polarity inversion period of the switching is randomly selected when switching from a certain polarity inversion period to another polarity inversion period in the plurality of polarity inversion periods. Further, it is preferable that the liquid crystal display device has a stereoscopic display function, and when performing stereoscopic display, the left eye image data and the right eye image data are alternately written into each of the plurality of pixels every two consecutive vertical scanning periods. And each of the plurality of pixels displays the same polarity in the two vertical scanning periods in which the left-eye image data is written, and displays the same polarity in the two vertical scanning periods in which the right-eye image data is written. Further, it is preferable that the plurality of pixel systems are arranged in a matrix of a plurality of columns and a plurality of rows and are adjacent to one of the plurality of pixels of the left eye image data and the right eye image data. The polarities of the pixels in the row direction in the plurality of pixels are the same as each other. 160473.doc -22· 201227705 Further, 'preferably, the plurality of pixels are arranged in a matrix of a plurality of columns and a plurality of rows' and are written in the plural number of the left eye image data and the right eye image data. In the case of the entire pixel, the polarities of the pixels adjacent to the column direction and the row direction of the plurality of pixels are different from each other. [Industrial Applicability] The present invention is particularly suitable for a liquid crystal display device capable of displaying a stereoscopic image. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a stereoscopic display system according to an embodiment of the present invention. Fig. 2 is a view showing an example of pixel polarity control. Fig. 3 is a view showing another example of pixel polarity control. Fig. 4 is a timing chart showing the manner in which the frame material and the liquid crystal shutter in the prior art are controlled. Figure 5 (a) shows the polarity of each pixel of the liquid crystal panel in the case where the polarity of the pixel is inverted every 2 frames; (b) shows the polarity of each pixel of the liquid crystal panel in the case where the polarity of the pixel is inverted every 4 frames Picture. [Main component symbol description] 100 liquid crystal display device 108 liquid crystal shutter L control signal 109 liquid crystal shutter R control signal 110 frame rate control circuit 120 timing controller 121 polarity control circuit (polarity control mechanism) 130 write state signal transmission circuit] 60473 .doc .23· 201227705 140 Scanning signal driving circuit 150 Display signal driving circuit 160 Backlight driving circuit 200 Liquid crystal panel 205 Vertical blanking period 250 Backlight unit 280 Shutter glasses 300 Stereoscopic display system 160473.doc -24-