TWI442372B - Field sequential color-optically compensated bend mode lcd device - Google Patents
Field sequential color-optically compensated bend mode lcd device Download PDFInfo
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本發明是有關於一種液晶顯示器,特別是有關於不同時間週期內具極性反轉特性之場序式-光學補償彎曲排列模式之液晶顯示器。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a liquid crystal display, and more particularly to a liquid crystal display having a field-sequential-optical compensation curved alignment mode having polarity inversion characteristics in different time periods.
現行的場序式-光學補償彎曲排列模式之液晶顯示器具有多項優點:(1)因為不需要使用彩色濾光片,在液晶盒上板製程上,省略了彩色光阻塗佈、顯影等製程,其僅需製作黑色矩陣(Black Matrix,BM)。(2)降低生產週期(Cycle Time)及不良率。(3)節省原料成本,由於基板不需要RGB子像素的設計,減少了單一像素中所需之薄膜電晶體個數,相對地提高生產良率(4)簡化控制電路之複雜度,同時也增加像素開口率(Aperture Ratio),有利於提高面板像素的空間解析度。爰此,無彩色濾光片的場序式-光學補償彎曲排列模式之液晶顯示器,在顯示效能上的最大增益,便在於大幅提昇光利用效率,降低耗電性,理論上可提昇至傳統彩色濾光片式液晶顯示器的三倍以上,因為平均有三分之二以上的光能量被彩色濾光片所吸收。The current field sequential-optical compensation curved alignment mode liquid crystal display has a number of advantages: (1) Since the color filter is not required, the process of color photoresist coating and development is omitted on the liquid crystal cell upper plate process. It only needs to make a Black Matrix (BM). (2) Reduce the Cycle Time and the defect rate. (3) Saving raw material cost, because the substrate does not need the design of RGB sub-pixels, the number of thin film transistors required in a single pixel is reduced, and the production yield is relatively increased (4) the complexity of the control circuit is simplified, and the complexity is also increased. The aperture ratio (Aperture Ratio) is beneficial to improve the spatial resolution of the panel pixels. Therefore, the field-sequential-optical compensation curved arrangement mode of the colorless filter has the maximum gain in display performance, which is to greatly improve the light utilization efficiency and reduce the power consumption, and can theoretically be upgraded to the conventional color. Filter-type liquid crystal displays are more than three times larger, because on average more than two-thirds of the light energy is absorbed by the color filters.
另外,場序式-光學補償彎曲排列模式之液晶顯示器前後時間週期內相同像素具同極性,如第1圖所示,其係為習知之場序式-光學補償彎曲排列模式之液晶顯示器之面板之示意圖,在面板100中包含子圖框10、20,此種驅動方式之缺點為相鄰像素111的顏色並不均勻,其具顏色之深淺差異,雖然調整電壓或共通電極電壓(VCOM )可改善,但要調整至每一面板的每一區域,則相對困難。In addition, the same pixel in the field sequential-optical compensation bending arrangement mode has the same polarity in the front and back time periods, as shown in FIG. 1 , which is a panel of a liquid crystal display of a conventional field sequential-optical compensation curved arrangement mode. The schematic diagram includes sub-frames 10 and 20 in the panel 100. The disadvantage of this driving method is that the color of the adjacent pixels 111 is not uniform, and the difference in color is different, although the voltage or common electrode voltage (V COM ) is adjusted. It can be improved, but it is relatively difficult to adjust to each area of each panel.
有鑑於習知技術之問題,本發明目的之一就是在提供一種場序式-光學補償彎曲排列模式之液晶顯示器以解決習知問題。In view of the problems of the prior art, one of the objects of the present invention is to provide a field sequential-optical compensation curved alignment mode liquid crystal display to solve the conventional problems.
根據本發明之目的,提出一種場序式-光學補償彎曲排列模式之液晶顯示器,其包含背光模組及光學補償彎曲排列模式之一面板。該背光模組包含至少一紅、一綠、一藍及一白之光源,以及該面板包含至少一像素及至少四個子圖框,該背光模組係搭配該些子圖框分別顯示單一種顏色,並且該背光模組搭配該些子圖框依序顯示相異顏色,其中該像素於一第一時間週期內具一第一極性,該像素於一第二時間週期內具一第二極性,該第二極性與該第一極性係呈極性反轉而具有相反極性,俾使該面板之顏色畫質均勻化。In accordance with the purpose of the present invention, a field sequential-optical compensated bend alignment mode liquid crystal display comprising a backlight module and one panel of an optically compensated curved alignment mode is provided. The backlight module includes at least one red, one green, one blue, and one white light source, and the panel includes at least one pixel and at least four sub-frames, and the backlight module respectively displays the single color with the sub-frames And the backlight module is configured to display different colors in sequence with the sub-frames, wherein the pixel has a first polarity in a first time period, and the pixel has a second polarity in a second time period. The second polarity and the first polarity are opposite in polarity and have opposite polarities to uniformize the color quality of the panel.
具體而言,若定義該面板內的每個像素於一第一時間週期內具有一第一極性,則該像素於第二時間週期內 具有一第二極性,該第二極性與第一極性係呈極性反轉而具有相反極性。其中,該第一時間週期與第二時間週期係相鄰之時間週期。實言之,若一次週期內(第一時間週期)的特定像素呈現正極性,而下一次週期(第二時間週期)內該特定像素則呈現負極性。所謂的正極性係表示像素之電壓高於一共通電極電壓,而負極性係表示像素之電壓低於該共通電極電壓。緣是,本發明之液晶顯示器內的每個像素藉由前後時間點內極性相互補償,而使得面板之顏色畫質得以均勻化,同時並達到排除顏色深淺差異的目的。Specifically, if each pixel in the panel is defined to have a first polarity in a first time period, the pixel is in the second time period. There is a second polarity, the second polarity and the first polarity are reversed in polarity and have opposite polarities. The first time period and the second time period are adjacent to each other. In other words, if a particular pixel in a cycle (first time period) exhibits a positive polarity, the particular pixel in the next cycle (a second time period) exhibits a negative polarity. The so-called positive polarity means that the voltage of the pixel is higher than a common electrode voltage, and the negative polarity means that the voltage of the pixel is lower than the common electrode voltage. The reason is that each pixel in the liquid crystal display of the present invention compensates for each other by the polarity in the front and back time points, so that the color quality of the panel is uniformized, and the purpose of eliminating the difference in color depth is achieved.
總括來說,本發明所述的面板不僅在前後時間內相同位置的像素呈一極性反轉的變化,面板所具有的四個子圖框內所相互對應的像素亦相互呈一極性之反轉。意即,若一子圖框的某個像素係正極性,而與之相鄰的另一子圖框所對應相同位置的像素即係負極性,又再下一子圖框所相對應的像素又轉換為正極性。此外,該些子圖框分別包含複數個像素,而每個子圖框內之該些像素彼此呈一極性反轉,其反轉模式可歸納為點反轉、2V1H及行反轉,並可藉由一極性訊號線之時間控制參數(TCON )來控制改變之。In summary, the panel of the present invention not only changes the polarity of the pixels in the same position in the front and rear time, but also the pixels corresponding to each other in the four sub-frames of the panel are reversed in polarity. That is, if one pixel of a sub-frame is positive, and the pixel corresponding to the other sub-frame adjacent to the sub-frame is negative, then the pixel corresponding to the next sub-frame It is converted to positive polarity. In addition, the sub-frames respectively comprise a plurality of pixels, and the pixels in each sub-frame are reversed in polarity, and the inversion modes can be summarized as point inversion, 2V1H and line inversion, and can be borrowed. The change is controlled by the time control parameter (T CON ) of a polarity signal line.
以下將參照相關圖式,說明本發明之場序式-光學補償彎曲排列模式之液晶顯示器之實施例,為便於理解,下 述實施例中相同元件係以相同之符號標示來說明。Hereinafter, an embodiment of the field sequential-optical compensation bending arrangement mode liquid crystal display of the present invention will be described with reference to the related drawings, for ease of understanding, The same elements in the embodiments are denoted by the same reference numerals.
首先陳明,傳統上一般的液晶顯示模組,其單一像素(Pixel)是由三個子像素(Sub-Pixel)所構成,每個子像素係各由一顆薄膜電晶體(Thin Film Transistor,TFT)控制著該子像素的電場強度,以決定通過該子像素的光強度。是以,通過各子像素之光能量,再經由各子像素所對應之原色(紅色、綠色及藍色)濾光片調變,俾以得到各子像素所需之各原色光強度。緣是,傳統液晶顯示技術,必須使用白色背光源模組,如冷陰極螢光燈管(Cold Cathode Fluorescent Lamp,CCFL)或是白光發光二極體(LED)光源。First of all, Chen Ming, a conventional liquid crystal display module, has a single pixel (Pixel) composed of three sub-pixels (Sub-Pixel), each of which is composed of a thin film transistor (TFT). The electric field strength of the sub-pixel is controlled to determine the light intensity passing through the sub-pixel. Therefore, the light energy of each sub-pixel is modulated by the primary color (red, green, and blue) filters corresponding to the respective sub-pixels to obtain the light intensity of each primary color required for each sub-pixel. The reason is that traditional liquid crystal display technology must use a white backlight module, such as a Cold Cathode Fluorescent Lamp (CCFL) or a white light emitting diode (LED) light source.
相對而言,場序式-光學補償彎曲排列模式(Field Sequential Color-Optically Compensated Bend,FSC-OCB)之液晶顯示器技術在液晶模組的組成元件中移除了彩色濾光片,因此各像素不需再分割出子像素,其色彩之形成則是依靠RGB-LED背光模組中,三種原色之光源依時序切換。同時搭配在各色光源顯示時間內,同步控制之液晶像素穿透率以調配各原色之相對光量,最後再由視覺系統對光刺激的積分作用,以形成並察知該顏色。也因為LED通常具有窄半高寬之頻譜特性,因此可呈現出高色彩飽和度之顏色,並有效地擴大系統色域。所以一般而言,場序式-光學補償彎曲排列模式之液晶顯示器技術在高色彩飽和度的特性表現上,也較一般使用彩色濾光片的液晶顯示技術者為佳。In contrast, the Field Sequential Color-Optically Compensated Bend (FSC-OCB) liquid crystal display technology removes the color filter from the constituent elements of the liquid crystal module, so each pixel does not The sub-pixels need to be segmented, and the color is formed by the RGB-LED backlight module, and the light sources of the three primary colors are switched according to the timing. At the same time, in the display time of each color light source, the liquid crystal pixel transmittance of the synchronous control is adjusted to adjust the relative light quantity of each primary color, and finally, the integration effect of the visual system on the light stimulation is performed to form and detect the color. Also because LEDs typically have a spectral characteristic of narrow half-height width, they can exhibit high color saturation colors and effectively expand the system color gamut. Therefore, in general, the liquid crystal display technology of the field sequential-optical compensation curved alignment mode is superior to the liquid crystal display technology generally using color filters in the performance of high color saturation.
準此,懇請參閱第2及5圖,第2圖係為本發明之 場序式-光學補償彎曲排列模式之液晶顯示器之點極性反轉模式之示意圖及第5圖係為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之方塊示意圖。如第2及5圖所示,在本發明之場序式-光學補償彎曲排列模式之液晶顯示器包含背光模組300以及光學補償彎曲排列模式之一面板100,其中背光模組300包含至少一紅、一綠、一藍及一白之光源,以及該面板(LCD frame)100、200可依時間週期依續顯示,且於每一時間週期至少顯示四個子圖框110-140、210-240,該背光模組300係搭配該些子圖框110-140、210-240分別顯示單一種顏色,並且該背光模組300搭配該些子圖框110-140、210-240依序顯示相異顏色。事實上,本發明只有一個面板,在第2圖中之上下半部代表著是該面板於兩個不同的時間週期內的變化。接續,所述的四個子圖框110-140、210-240彼此相鄰排列,並可將其歸納為第一子圖框110、210顯示灰色、第二子圖框120、220顯示藍色、第三子圖框130、230顯示綠色及第四子圖框140、240顯示紅色。再者,所述面板100、200包含至少一像素111、211。其中,面板100、200的每一個子圖框110-140、210-240係例如皆包含至少一像素111、211。換言之,本發明所述之像素111、211不需再分割出子像素。For this purpose, please refer to Figures 2 and 5, and Figure 2 is the present invention. The schematic diagram of the dot polarity inversion mode of the liquid crystal display in the field sequential-optical compensation bending alignment mode and the fifth figure are block diagrams of the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention. As shown in FIGS. 2 and 5, the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention comprises a backlight module 300 and an optical compensation curved alignment mode panel 100, wherein the backlight module 300 includes at least one red. a green, a blue, and a white light source, and the LCD frame 100, 200 can be displayed continuously according to a time period, and at least four sub-frames 110-140, 210-240 are displayed in each time period. The backlight module 300 displays a single color with the sub-frames 110-140 and 210-240, and the backlight module 300 displays the different colors in sequence with the sub-frames 110-140 and 210-240. . In fact, the present invention has only one panel, and the upper and lower halves in Fig. 2 represent changes in the panel over two different time periods. Next, the four sub-frames 110-140, 210-240 are arranged adjacent to each other, and can be summarized as the first sub-frame 110, 210 is displayed in gray, and the second sub-frame 120, 220 is displayed in blue. The third sub-frame 130, 230 displays green and the fourth sub-frame 140, 240 displays red. Furthermore, the panels 100, 200 comprise at least one pixel 111, 211. Each sub-frame 110-140, 210-240 of the panel 100, 200, for example, includes at least one pixel 111, 211. In other words, the pixels 111, 211 of the present invention do not need to be further divided into sub-pixels.
詳言之,當面板100內每個子圖框110-140中的每個像素111於一第一時間週期內具有一第一極性,該像素111於第二時間週期內則具有一第二極性,第二極性 與第一極性係呈極性反轉而具有相反極性。其中,該第一時間週期與第二時間週期係相鄰之時間週期。具體而言,每個相鄰排列的子圖框中的每個像素於第一時間週期內之極性與第二時間週期內之極性反轉,液晶顯示器之顏色畫質因而得以均勻化。倘若對照第2圖,即可得知第2圖上半部呈現一次時間週期內(第一時間週期)每個像素111的極性(正極性或負極性),其與第2圖下半部所呈現下一次時間週期內(第二時間週期)每個像素211的極性(負極性或正極性)相反。舉例而言,一次時間週期內的特定像素111呈現正極性,而下一次時間週期內該特定像素211則是負極性。實際上,所謂的正極性係表示像素之電壓高於一共通電極電壓,而負極性係表示像素之電壓低於該共通電極電壓。爰此,本發明之面板100、200內的每個像素111、211藉由前後時間點內極性相互補償,而使得液晶顯示器之顏色畫質得以均勻化,同時並達到排除顏色深淺差異的目的。In detail, each pixel 111 in each sub-frame 110-140 in the panel 100 has a first polarity in a first time period, and the pixel 111 has a second polarity in a second time period. Second polarity It has a polarity inversion with the first polarity and has opposite polarity. The first time period and the second time period are adjacent to each other. Specifically, the polarity of each pixel in each adjacent sub-frame is reversed in the polarity of the first time period and the polarity in the second time period, and the color quality of the liquid crystal display is thus uniformized. According to Fig. 2, it can be known that the upper half of Fig. 2 exhibits the polarity (positive polarity or negative polarity) of each pixel 111 in a time period (first time period), which is the same as the lower half of Fig. 2. It is assumed that the polarity (negative polarity or positive polarity) of each pixel 211 is reversed in the next time period (second time period). For example, a particular pixel 111 in a time period exhibits a positive polarity, while the particular pixel 211 in the next time period is a negative polarity. In fact, the so-called positive polarity means that the voltage of the pixel is higher than a common electrode voltage, and the negative polarity means that the voltage of the pixel is lower than the voltage of the common electrode. Therefore, each pixel 111, 211 in the panel 100, 200 of the present invention compensates for the polarity of the liquid crystal display by mutual compensation of the polarities in the front and rear time points, and at the same time achieves the purpose of eliminating the difference in color depth.
承前所述,以第一時間週期而言,本發明的液晶顯示器具有的四個子圖框110-140,而該四個相鄰的子圖框110-140內所對應之像素111亦相互呈一極性之反轉(Polarity Inversion)。以第2圖為例,每個相鄰子圖框110-140所屬對應相同位置的像素111皆成一正負極性之反轉變化。意即,若第一子圖框110的某個像素111係正極,而第二子圖框120所對應的像素即係負極性,又第三子圖框130所相對應的像素又轉換為正極性。另 外,第2圖係屬於點反轉[dot inversion]模式,換言之,所謂點反轉即係在每個子圖框110-140中每個相鄰像素111的極性都是反轉的。As described above, in the first time period, the liquid crystal display of the present invention has four sub-frames 110-140, and the pixels 111 corresponding to the four adjacent sub-frames 110-140 are also one another. Polarity Inversion. Taking FIG. 2 as an example, the pixel 111 corresponding to the same position of each adjacent sub-frame 110-140 has a reverse polarity change of positive and negative polarity. That is, if a certain pixel 111 of the first sub-frame 110 is a positive electrode, and the pixel corresponding to the second sub-frame 120 is a negative polarity, the pixel corresponding to the third sub-frame 130 is converted into a positive electrode. Sex. another In addition, the second figure belongs to the dot inversion mode. In other words, the dot inversion is that the polarity of each adjacent pixel 111 is inverted in each sub-frame 110-140.
總而言之,每個子圖框110-140、210-240分別包含複數個像素111、211,而子圖框110-140、210-240內之該些像素111、211彼此呈一極性反轉。復言之,每個子圖框110-140、210-240中的像素111、211的極性是不停的變換,而相鄰的像素111、211是否具有相同的極性,那可就依照不同的極性轉換方式來決定了。因而,請接續參閱第3圖及第4圖,其係分別為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之2V1H模式之示意圖及本發明之場序式-光學補償彎曲排列模式之液晶顯示器之行反轉[column inversion]模式之示意圖。審酌於第3圖及第4圖之中,無論是所屬像素於先後時間週期內的反轉,亦或是相鄰子圖框110-140、210-240對應位置的像素111、211反轉型態,都與前述無異。也就是說,本發明最主要的技術特徵在於,前後時間週期內相同位置的像素111、211呈極性反轉與相鄰子圖框110-140、210-240相互對應位置的像素111、211亦呈極性反轉,故於此不再贅述。In summary, each of the sub-frames 110-140, 210-240 includes a plurality of pixels 111, 211, respectively, and the pixels 111, 211 in the sub-frames 110-140, 210-240 are inversely inverted from each other. In other words, the polarity of the pixels 111, 211 in each of the sub-frames 110-140, 210-240 is continuously changing, and whether the adjacent pixels 111, 211 have the same polarity, which may be according to different polarities. The conversion method is decided. Therefore, please refer to FIG. 3 and FIG. 4 respectively, which are schematic diagrams of the 2V1H mode of the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention and the field sequential-optical compensation bending arrangement mode of the present invention. A schematic diagram of the column inversion mode of the liquid crystal display. It is considered that in the third picture and the fourth picture, whether the pixel belongs to the inversion in the successive time period, or the pixels 111, 211 in the corresponding positions of the adjacent sub-frames 110-140, 210-240 are reversed. The type is the same as the above. That is to say, the most important technical feature of the present invention is that the pixels 111 and 211 at the same position in the front and rear time periods are in the form of pixels 111 and 211 whose polarities are reversed and the adjacent sub-frames 110-140 and 210-240 correspond to each other. The polarity is reversed, so it will not be described here.
然,審酌2V1H及行反轉與點極性反轉模式不同者,係在於第3圖中每個子圖框110-140、210-240內的像素111、211極性反轉是以兩個像素111、211為一單位做反轉,而第4圖中則以整行像素111、211為一單位 做反轉。其中所述之該極性反轉係藉由一極性訊號線(未繪示)之時間控制參數來控制改變之。However, the difference between the 2V1H and the line inversion and the point polarity inversion mode is that the polarity of the pixels 111 and 211 in each sub-frame 110-140, 210-240 in FIG. 3 is reversed by two pixels 111. 211 is a unit for inversion, and in FIG. 4, the entire line of pixels 111, 211 is a unit. Do reverse. The polarity inversion described therein is controlled by a time control parameter of a polarity signal line (not shown).
是以,上所述僅為最佳實施例的揭示,而非用以限定本發明。任何未脫離本發明之精神與範疇,而進行之等效修改或變更,均應包含於後附之申請專利範圍中。Therefore, the above description is only the disclosure of the preferred embodiment, and is not intended to limit the invention. Any equivalent modifications or alterations made without departing from the spirit and scope of the invention are intended to be included in the scope of the appended claims.
10‧‧‧子圖框10‧‧‧Sub-frame
20‧‧‧子圖框20‧‧‧Sub-frame
100‧‧‧面板100‧‧‧ panel
110‧‧‧第一子圖框110‧‧‧ first sub-frame
111‧‧‧像素111‧‧‧ pixels
120‧‧‧第二子圖框120‧‧‧ second sub-frame
130‧‧‧第三子圖框130‧‧‧ Third sub-frame
140‧‧‧第四子圖框140‧‧‧ fourth sub-frame
200‧‧‧面板200‧‧‧ panel
210‧‧‧第一子圖框210‧‧‧ first sub-frame
211‧‧‧像素211‧‧ ‧ pixels
220‧‧‧第二子圖框220‧‧‧Second sub-frame
230‧‧‧第三子圖框230‧‧‧ third sub-frame
240‧‧‧第四子圖框240‧‧‧ fourth sub-frame
300‧‧‧背光模組300‧‧‧Backlight module
第1圖係為習知之場序式-光學補償彎曲排列模式之液晶顯示器之面板之示意圖。Figure 1 is a schematic diagram of a panel of a liquid crystal display of the conventional field sequential-optical compensated bend alignment mode.
第2圖係為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之點極性反轉模式之示意圖。Figure 2 is a schematic diagram of the dot polarity inversion mode of the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention.
第3圖係為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之2V1H反轉模式之示意圖。Figure 3 is a schematic diagram of the 2V1H inversion mode of the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention.
第4圖係為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之行極性反轉模式之示意圖。Fig. 4 is a schematic view showing the line polarity inversion mode of the liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention.
第5圖係為本發明之場序式-光學補償彎曲排列模式之液晶顯示器之方塊示意圖。Figure 5 is a block diagram of a liquid crystal display of the field sequential-optical compensation bending arrangement mode of the present invention.
100‧‧‧面板100‧‧‧ panel
110‧‧‧第一子圖框110‧‧‧ first sub-frame
111‧‧‧像素111‧‧‧ pixels
120‧‧‧第二子圖框120‧‧‧ second sub-frame
130‧‧‧第三子圖框130‧‧‧ Third sub-frame
140‧‧‧第四子圖框140‧‧‧ fourth sub-frame
200‧‧‧面板200‧‧‧ panel
210‧‧‧第一子圖框210‧‧‧ first sub-frame
211‧‧‧像素211‧‧ ‧ pixels
220‧‧‧第二子圖框220‧‧‧Second sub-frame
230‧‧‧第三子圖框230‧‧‧ third sub-frame
240‧‧‧第四子圖框240‧‧‧ fourth sub-frame
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