TW201227107A - Blue phase liquid crystal display panel and driving method thereof - Google Patents

Blue phase liquid crystal display panel and driving method thereof Download PDF

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TW201227107A
TW201227107A TW99146634A TW99146634A TW201227107A TW 201227107 A TW201227107 A TW 201227107A TW 99146634 A TW99146634 A TW 99146634A TW 99146634 A TW99146634 A TW 99146634A TW 201227107 A TW201227107 A TW 201227107A
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strip
electrode
liquid crystal
blue phase
pattern
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TW99146634A
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Chinese (zh)
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TWI418905B (en
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Cheng-Yeh Tsai
Tai-Hsiang Huang
Fang-Cheng Yu
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Au Optronics Corp
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Abstract

A blue phase liquid crystal display panel including a first substrate, a second substrate, an auxiliary electrode layer and a blue phase liquid crystal layer is provided. The first substrate has a plurality of display units, each of the display units includes a pixel electrode and a common electrode electrically insulated from the pixel electrode. The pixel electrode has a plurality of first stripe patterns and the common electrode has a plurality of second stripe patterns. The first stripe patterns and the second stripe patterns are arranged alternately. The second substrate is disposed opposite to the first substrate. The auxiliary electrode layer is disposed on the second substrate and faces the display units. The auxiliary electrode layer is electrically insulated from the pixel electrode and the common electrode to provide a lateral constant electric field. The blue phase liquid crystal layer is sandwiched between the first substrate and the second substrate.

Description

/ LKJ ! δ5 36941twf.doc/n 六、發明說明: 【發明所屬之技術領域】 本發明是有關於一種液晶顯示面板及其驅動方法,且 特別是有關於一種藍相液晶顯示面板(blue phase liquid crystal display panel)及其驅動方法。 【先前技術】 西元1888年,Friedrich Reinitzer將膽固醇型苯曱酸鹽 (Cholesteric benzoate)置於偏光顯微鏡中,觀察到膽固醇型 苯甲酸鹽在勻相(Isotropic)與膽固醇相(cholesteric)會呈現 出不同顏色(藍紫色和藍色),勻相與膽固醇相之間的顏色 變化現象僅存在於很小的溫度區間(約只有溫度區 間)。西元1970年,許多科學家利用容積分析、高解析度示 差掃描熱卡計等方法,證實前述現象是一種新的熱力學穩 定相’並稱其為藍相。 藍相具有三種不同相的存在,這三種相表示為Bp I、 ΒΡΙΙ、BPIII ’而BPIII存在的溫度是三個相中最高的,在 文獻中提到的BP III是、、f〇g phase〃。相較於bp I與BP II的 立方體結構(cubic),BP III是無定型(amorph〇us)。在偏光顯 微鏡下觀察,BP III通常是無任何結構的模糊影像 ’因此很 難於偏光顯微鏡下觀察。 而BP I、BP II之結構已被證實,構成Bp j、Βρ η的 基本單元為、、雙扭轉圓柱狀〃(DTC: double twist cylinder),這樣的排列方式具有最小的自由能。此外,雙 36941twf.doc/n 201227107 Λ Λ. Λ W Λ ^ 扭轉圓柱管在空間的排列是互相垂直,這樣的排列導致缺 陷(defect)的晶格,而且被認為是由液晶相進入膽固醇相 的預轉換現象(pre-transitional phenomena)。因此,藍相被 歸類為無效相(frustrated phases)。利用布拉格散射、Kossel 繞射圖、光學組織、晶體成長等實驗性的研究發現,BP II 是簡單立方結構(SC: simple cubic )( Mol. Cryst. Liq. Cryst.,Vol. 465, pp. 283-288, 2007)、BPI 是體心立方結構 (BCC: body-centered cubic)。不同於其他液晶相,如向歹ij 相(nematic)、層列相(smectic)、勻相(isotropic),通常 BP I、 BP II在偏光顯微鏡下會顯示許多板狀(piateiet texture)的 彩色圖形(J.A.C.S, 2008, 130, 6326 Kikuchi et. al.),這是 因為晶格週期在可見光波長範圍造成布拉格反射所致。 一般的液晶具有光學異相性(optically anisotropic),但 是藍相卻是具有光學等向性(〇ptically is〇tr〇pic)。換言之, 藍相具有非常低或者甚至不具有複折射性(Birefringence)。 由於藍相的晶格週期為可見光波長的函數,故會產生 選擇性”布拉格反射”(selective Bragg reflection)。這種特 性使得藍相液晶具有應用在快速應答之光閥(fast light modulators)。但是,無論在理論上的預測還是在實驗上的 觀察,藍相液晶僅出現在具備有高純度、高旋光性的分子 材料中,因此藍相液晶僅存在於很小的溫度區間内(小於 2 溫度區間)。因此’藍相液晶通常僅在學術上被討論, 但在貫際應用上並未受到重視。 近十年來,為了使液晶顯示面板的顯示品質臨駕於陰 201227107^3 36941twf.doc/n 極射線管的顯示品質’具有快速應答特性的藍相又受到學 術以及產業界的重視。為了應用上的需要,藍相液晶必須 具備有寬廣的溫度應用範圍,因此不同的技術發展相繼被 提出。例如’利用高分子穩定的特性(產生高分子網狀結 構)以產生能夠存在於寬廣溫度區間内的藍相(Nature materials,2002, 1, 64)。此外,在 2002 年,Kikuchi 等人將 少量的分子單體及光阻劑加入藍相液晶中,並在藍相溫度 範圍内照光產生如凝膠結構的穩定藍相,成功的產生出溫 度區間約為60°C的藍相。 雖然藍相液晶具有快速應答時間與光學等向性等優 點,但卻有驅動電壓較高之缺點,其驅動電壓高達55伏。 就量產的角度來看,藍相液晶的高驅動電壓是亟需解決的 問題之一。 【發明内容】 本發明提供一種藍相液晶顯示面板,其具有辅助電極 層以降低驅動電壓。 本發明提供一種藍相液晶顯示面板的驅動方法,以有 效降低藍相液晶顯示面板之驅動電壓。 本發明提供一種藍相液晶顯示面板,其包括一第一基 板、一第二基板、一輔助電極層以及一藍相液晶層。第一 基板具有多個顯示單元,每一顯示單元包括一畫素電極以 及一共通電極。畫素電極具有多個第一條狀圖案,共通電 極與畫素電極電性絕緣,而共通電極具有多個第二條狀圖 案’且第一條狀圖案與第二條狀圖案係交替排列。第二基 201227107 〇 36941twf.doc/n 且面對二=電 性絕緣,且輔助電極層提供1橫共通_電 藍相液晶層配置於= 括2發,施例中’前述之顯示單元可進-步包 f=,且此開關元件與晝素電極電性連接。/ LKJ ! δ5 36941twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display panel and a driving method thereof, and more particularly to a blue phase liquid crystal display panel (blue phase liquid) Crystal display panel) and its driving method. [Prior Art] In 1888, Friedrich Reinitzer placed Cholesteric benzoate in a polarizing microscope and observed that cholesteric benzoate appeared in the isotropic and cholesteric phases. Different colors (blue-violet and blue), the color change between the homogeneous phase and the cholesterol phase exists only in a small temperature range (about the temperature range). In 1970, many scientists used volumetric analysis, high-resolution differential scanning calorimetry, and other methods to confirm that the aforementioned phenomenon is a new thermodynamically stable phase and called the blue phase. The blue phase has three different phases, which are expressed as Bp I, ΒΡΙΙ, BPIII ' and the temperature at which BPIII is present is the highest among the three phases. BP III mentioned in the literature is , f〇g phase〃 . Compared to the cubic structure of bp I and BP II, BP III is amorphous (amorph〇us). Observed under polarized microscopy, BP III is usually a blurred image without any structure' and is therefore difficult to observe under a polarizing microscope. The structure of BP I and BP II has been confirmed, and the basic unit constituting Bp j and Βρ η is a double twist cylinder (DTC), and this arrangement has the smallest free energy. In addition, the double 36941twf.doc/n 201227107 Λ Λ. Λ W Λ ^ The arrangement of the torsion cylindrical tubes in the space is perpendicular to each other, such an arrangement results in a defective crystal lattice, and is considered to be the liquid crystal phase entering the cholesterol phase. Pre-transitional phenomena. Therefore, the blue phase is classified as a frustrated phase. Experimental studies using Bragg scattering, Kossel diffraction patterns, optical organization, and crystal growth have found that BP II is a simple cubic structure (SC: simple cubic) (Mol. Cryst. Liq. Cryst., Vol. 465, pp. 283 -288, 2007), BPI is body-centered cubic structure (BCC: body-centered cubic). Unlike other liquid crystal phases, such as nematic, smectic, and isotropic, BP I and BP II usually display a number of pieatet textures under a polarizing microscope. (JACS, 2008, 130, 6326 Kikuchi et. al.), because the lattice period causes Bragg reflection in the visible wavelength range. A typical liquid crystal is optically anisotropic, but a blue phase is optically isotropic. In other words, the blue phase has very low or even no birefringence. Since the lattice period of the blue phase is a function of the wavelength of visible light, selective "selective Bragg reflection" is produced. This feature makes blue phase liquid crystals have fast light modulators for use in fast response. However, no matter in theoretical prediction or experimental observation, blue phase liquid crystal only appears in molecular materials with high purity and high optical rotation, so blue phase liquid crystal exists only in a small temperature range (less than 2). Temperature range). Therefore, blue phase liquid crystals are usually only discussed academically, but they have not received much attention in their application. In the past ten years, in order to make the display quality of the liquid crystal display panel in the shade of the display quality of the polar ray tube, the blue phase with fast response characteristics has received attention from the academic and industrial circles. In order to meet the needs of the application, blue phase liquid crystals must have a wide range of temperature applications, so different technological developments have been proposed. For example, 'the polymer is stabilized (generating a polymer network structure) to produce a blue phase that can exist in a wide temperature range (Nature materials, 2002, 1, 64). In addition, in 2002, Kikuchi et al. added a small amount of molecular monomer and photoresist to the blue phase liquid crystal, and produced a stable blue phase such as a gel structure in the blue phase temperature range, successfully producing a temperature interval of about It is a blue phase of 60 °C. Although blue phase liquid crystals have advantages such as fast response time and optical isotropic, they have the disadvantage of high driving voltage, and the driving voltage is as high as 55 volts. From the perspective of mass production, the high driving voltage of blue phase liquid crystal is one of the problems that need to be solved. SUMMARY OF THE INVENTION The present invention provides a blue phase liquid crystal display panel having an auxiliary electrode layer to lower a driving voltage. The present invention provides a driving method of a blue phase liquid crystal display panel to effectively reduce a driving voltage of a blue phase liquid crystal display panel. The present invention provides a blue phase liquid crystal display panel comprising a first substrate, a second substrate, an auxiliary electrode layer and a blue phase liquid crystal layer. The first substrate has a plurality of display units, each of which includes a pixel electrode and a common electrode. The pixel electrode has a plurality of first strip patterns, the common electrode is electrically insulated from the pixel electrode, and the common electrode has a plurality of second strip patterns and the first strip pattern and the second strip pattern are alternately arranged. The second base 201227107 〇36941twf.doc/n and facing two = electrical insulation, and the auxiliary electrode layer provides 1 horizontal common_electric blue phase liquid crystal layer is arranged in = 2 rounds, in the example, the aforementioned display unit can enter The step package f=, and the switching element is electrically connected to the halogen electrode.

-電施例中,前述之輔助電極層包括一第 電極以及一弟一電極,其中第— 圖案,第二電極具有多個第四條狀 ^ 圖案 與第四條狀圖案係交替排列。 乐一1 在本發社-實施财,前述1—錄_與第二 條狀圖案的寬度為L卜各個第—條狀圖案與相料第二條 狀圖案的間隔為S1,第三條狀圖案與第四條狀圖案的寬度 為L 2 ’各個第三條狀圖案與相鄰之第四條狀圖案的間隔為 S2 ’而L1實質上等於L2,且S1實質上等於S2。 在本發明之一實施例中,前述之第一條狀圖索與第二 條狀圖案的寬度為L1,各個第一條狀圖案與相鄰之第二條 狀圖案的間隔為S1’第三條狀圖案與第四條狀圖索的寬度 為L2’各個第三條狀圖案與相鄰之第四條狀圖案的間隔為 S2,且 L1/S1 不等於 L2/S2。 在本發明之一實施例中,前述之第三條狀圖案與第四 條狀圖案的固定電壓差低於藍相液晶層的啟始電壓 (threshold voltage,Vth) ° 本發明另提供一種藍相液晶顯示面板的驅動方法’適 201227107 丨 36941twf.doc/n 於驅動前述之藍相液_ 驅動方法包括:驅動二= 晶顯示面板的 層顯示-f彡像。素電極與共核極,以使藍相液晶 j本發明之一實施例中’前述之辅助電極層包括一第 荦,第-電極極具有多個第三條狀圖 案第一電極具有多個第四條狀圖案,第三條 四=狀圖案係交替排列,而驅動輔助電極層的方法^. 令第二條狀u案與第四條狀圖案維持—固 / L . 在本發明之一實施例中,前述之橫 二° 晝素電極與共通電極之前形成。 電琢係於驅動 在本發月之一貫施例中,前述之橫向定 畫素電極與共通電極的同時形成。 €每係於驅動 由於本發明之藍相液晶顯示面板具有補 此本發明之藍相液晶顯示面板的_電壓、。層’因 降低。 ju進一步地被 為讓本發明之上述和其他目的、特徵 易懂’下域舉較佳實關,並配合所ϋ更明顯 明如下。 同式,作詳細說 【實施方式】 圖1為本發明一實施例之藍相液晶顯示面板 _ 意圖’而圖2為本發明—實施例之輔助電極層、面不 以及共通電極層之示意圖。請參照圖1與圖2,^二,極 之藍相液晶顯示面板1〇〇包括一第一基板11〇、一例 201227107 --------25 36941twf.doc/n 板120、一輔助電極層i3〇以及一藍相液晶層14〇。 板11〇具有多個顯示單元112,每一顯示單元ιΐ2包括二 晝素電極112a以及一共通電極112b。晝素電極ιΐ2=且 多個第-條狀圖案Π,共通電極112b與晝素f極112= 性絕緣’而共通電極mb具有多個第二條狀圖案p2,1 第一條狀圖案P1與第二條狀圖案!>2係交替排列。 板120與第-基板110相對配置,輔助電極層13〇配^ 第二基板12G上並且面對顯示單元m,辅助電極層⑽ 與晝素電極ma以及共通電極mb電性纟峰,且 一橫向定電場E1°此外’藍相液晶層140配 置於第一基板110與第二基板12〇之間。 a板在例一基板110例如為—主動元件陣列 基板评吕之,第一基板110上之各個顯示單元112 步包括-開關元件ll2e,且此開關元件U2e與晝素 112a電性連接。舉例而言,前述之開關元件m g 電晶體。此外,$ 了將顯示資料順利地寫入晝素電極 上,開關7L件112e例如係與對狀掃描線以及資料 接。 、史 詈於ί實之第二基板UG例如為—彩色縣片,而配 置於第-基板12G上的輔助電極層13()包括 =大=T 134’其中第一電極132具有多個第三 日、丄二 第一電極134具有多個第四條狀圖案P4, ? f f圖案P3與第四條狀圖案P4係交替排列。如圖 奢ΐ狀圖案Pl的延伸方向例如係與第二條狀圖 、、 向平行,第三條狀圖案P3的延伸方向例如 201227107 -i 36941twf.doc/n 係與第四條狀圖案P4的证I七a亚 ISI^ P1 伸方向千仃,而各個第一條狀 圖案·《質上對準於對應之第三條狀圖案P3,且各 二條狀_ P2實質上對準於對應之第四條狀p 言之’第-條狀圖案P1與第二條狀圖案p2的寬度卜 與相鄰之第二條狀圖案P2的間隔為 S1 ’第二條狀_ P3與第四條狀圖案P4的寬 L2, ί2個:if二圖fj3與相鄰之第四條狀圖案P4的間隔為 而L1貫貝上專於L2,且S1實質上等於S2。 為了不影響藍相液晶顯示面板的暗態顯示品質,本實 圖案朽與第四條狀圖案p4之間維持-固 疋電i差’且此固定電壓差通常需低於藍相液晶層刚的 v〇itage ’m) °此處’藍相液晶層140 的啟始電财絲為藍她㈣⑽的穿透率開 時,所對應到的驅動電壓值。舉例而言,前述之固。定^壓 差例如係介於(U伏至20伏之間,較佳是介於〇 5伏至1〇 :戶疋"於1伏至7伏之間’而前述之藍相液 曰曰層140的厚度例如係介於3 8微米至4微米之間。第三 條狀圖案31與第四條狀圖案P4可以橫跨同-列的多個^ 示單兀112,以提供相同_定電壓差,或是由開關元件(未 繪不)獨立㈣每各顯示單元第三條狀圖案p3與第四條狀 圖案P4之間的固定電壓差。 '、 本實施例令第三條狀圖案P 3與第四條狀圖案p4之間 維持固定電壓差之主要目的為進一步降低藍相液晶顯示 面板100的驅動電壓。在驅動藍相液晶顯示面板100時, 可先驅動輔助電極層1;30,以使輔助電極層130產生横向 2012271075 36941twf.doc/n 二雷Π再驅動晝素電極112a與共通電極112b以 產生&向電琢E2,進而使藍嫌晶層14G顯示 去 然’此領域具有通常知财亦可在軸晝素餘 驅動輔助電極層130以產生橫向定電 琢Ε值付注思的疋,橫向定電場Ε1與橫向電場Ε2丑 同決定藍相液晶層14〇的排列方式,且在橫向定電場幻 存在的情況下’由晝素電極112a與共通電極咖所提供In the embodiment, the auxiliary electrode layer comprises a first electrode and a first electrode, wherein the first pattern has a plurality of fourth strip patterns and the fourth strip pattern is alternately arranged.乐一1 In this hair salon-implementation, the width of the first 1-record_and the second strip-shaped pattern is L. The interval between each strip-shaped pattern and the second strip-like pattern of the phase material is S1, the third strip The width of the pattern and the fourth strip pattern is L 2 'the interval between each of the third strip patterns and the adjacent fourth strip pattern is S2 ' and L1 is substantially equal to L2, and S1 is substantially equal to S2. In an embodiment of the present invention, the width of the first strip pattern and the second strip pattern is L1, and the interval between each first strip pattern and the adjacent second strip pattern is S1' third. The width of the strip pattern and the fourth strip pattern is L2', and the interval between each of the third strip patterns and the adjacent fourth strip pattern is S2, and L1/S1 is not equal to L2/S2. In an embodiment of the invention, the fixed voltage difference between the third strip pattern and the fourth strip pattern is lower than the threshold voltage (Vth) of the blue phase liquid crystal layer. The present invention further provides a blue phase. The driving method of the liquid crystal display panel 'suitable 201227107 丨36941twf.doc/n for driving the aforementioned blue phase liquid _ driving method includes: driving the layer display of the two = crystal display panel -f彡 image. The first electrode of the present invention has a plurality of third electrodes. The first electrode has a plurality of third strip patterns. The first electrode has a plurality of first electrodes. a four-bar pattern, a third strip-like pattern alternately arranged, and a method of driving the auxiliary electrode layer ^. maintaining the second strip-shaped pattern and the fourth strip-like pattern to maintain - solid / L. In one embodiment of the present invention In the example, the aforementioned transverse dioxin electrode is formed before the common electrode. Electro-Electrical System Driven In the consistent application of this month, the aforementioned laterally-defined pixel electrode is formed simultaneously with the common electrode. Each of the units is driven by the blue phase liquid crystal display panel of the present invention to have the voltage of the blue phase liquid crystal display panel of the present invention. The layer ' is reduced. The above and other objects and features of the present invention are further described in the following description. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing a blue phase liquid crystal display panel according to an embodiment of the present invention, and FIG. 2 is a schematic view showing an auxiliary electrode layer, a surface electrode, and a common electrode layer according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2, the second blue phase liquid crystal display panel 1 includes a first substrate 11 一例, an example 201227107 -------- 25 36941 twf. doc / n board 120, an auxiliary The electrode layer i3 〇 and a blue phase liquid crystal layer 14 〇. The board 11A has a plurality of display units 112, and each of the display units ι2 includes a dioxet electrode 112a and a common electrode 112b. The pixel electrode ιΐ2=and the plurality of first strip patterns Π, the common electrode 112b and the halogen element 112 are electrically insulated and the common electrode mb has a plurality of second strip patterns p2,1 the first strip pattern P1 and The second strip pattern! > 2 are alternately arranged. The plate 120 is disposed opposite to the first substrate 110, and the auxiliary electrode layer 13 is disposed on the second substrate 12G and faces the display unit m. The auxiliary electrode layer (10) and the pixel electrode ma and the common electrode mb are electrically peaked, and a lateral direction The constant electric field E1° is further disposed between the first substrate 110 and the second substrate 12A. The a board is in the example substrate 110, for example, an active device array substrate. Each of the display units 112 on the first substrate 110 includes a switching element 11e, and the switching element U2e is electrically connected to the halogen 112a. For example, the aforementioned switching element m g is a transistor. Further, $ displays the display data smoothly onto the halogen electrode, and the switch 7L member 112e is connected to the scanning line and the data, for example. The second substrate UG is, for example, a color county slice, and the auxiliary electrode layer 13 () disposed on the first substrate 12G includes = large = T 134', wherein the first electrode 132 has a plurality of third The first and second electrodes 134 have a plurality of fourth strip patterns P4, and the FF pattern P3 and the fourth strip pattern P4 are alternately arranged. The extending direction of the luxuriant pattern P1 is, for example, parallel to the second strip pattern, and the direction of extension of the third strip pattern P3 is, for example, 201227107 -i 36941 twf.doc/n and the fourth strip pattern P4. I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I The width of the stripe pattern of the first strip pattern P1 and the second strip pattern p2 and the adjacent second strip pattern P2 are S1 'the second strip shape _ P3 and the fourth strip pattern The width L2 of P4, ί2: the interval between the if two graph fj3 and the adjacent fourth strip pattern P4 is L1 and the S1 is substantially equal to S2. In order not to affect the dark state display quality of the blue phase liquid crystal display panel, the solid pattern is maintained between the fourth strip pattern p4 and the fixed voltage difference is usually lower than that of the blue phase liquid crystal layer. V〇itage 'm) ° Here, the starting voltage of the blue phase liquid crystal layer 140 is blue. When the transmittance of the (4) (10) is turned on, the corresponding driving voltage value is obtained. For example, the foregoing is solid. The pressure difference is, for example, between (U volts to 20 volts, preferably between 〇5 volts to 1 〇: 疋" between 1 volt and 7 volts' and the aforementioned blue phase liquid 曰曰The thickness of the layer 140 is, for example, between 38 μm and 4 μm. The third strip pattern 31 and the fourth strip pattern P4 may span the plurality of cells 112 of the same column to provide the same The voltage difference is either a separate (4) fixed voltage difference between the third strip pattern p3 and the fourth strip pattern P4 of each display unit by the switching element (not shown). 'This embodiment makes the third strip pattern The main purpose of maintaining a fixed voltage difference between P 3 and the fourth strip pattern p4 is to further reduce the driving voltage of the blue phase liquid crystal display panel 100. When driving the blue phase liquid crystal display panel 100, the auxiliary electrode layer 1 may be driven first; So that the auxiliary electrode layer 130 generates a lateral direction 2012271075 36941twf.doc/n two thunder and then drives the halogen electrode 112a and the common electrode 112b to generate & the electric 琢 E2, thereby causing the blue smear layer 14G to display the field. It is also possible to use the general knowledge to drive the auxiliary electrode layer 130 to generate the lateral constant power value. The lateral fixed electric field Ε1 and the transverse electric field Ε2 ugly determine the arrangement of the blue phase liquid crystal layer 14〇, and in the case where the lateral fixed electric field is illusory, 'provided by the halogen electrode 112a and the common electrode coffee

=橫向電場E2可以被進—步降低,進而 電 壓的效果。 千丨-、为切电 圖3繪示出本發明之實施例具有辅助電極層之藍相液 晶顯不面板以及比較例不具助電極層之藍相液晶顯示 面板的驅動電壓-穿透率曲線(V_Tcurves)。請參照圖3,在 比較例之不具有辅助電歸之藍相液晶顯示面板(習知技 術)中,其比較例之顯示單元為習知的平面轉換型晝素單 元(In-Plane Switching pixelunits),僅具有畫素電極與共通= The transverse electric field E2 can be further reduced, and the effect of the voltage. The driving voltage-transmission curve of the blue phase liquid crystal display panel having the auxiliary electrode layer and the blue phase liquid crystal display panel without the auxiliary electrode layer of the embodiment of the present invention is shown in FIG. V_Tcurves). Referring to FIG. 3, in the blue phase liquid crystal display panel (known technique) of the comparative example, the display unit of the comparative example is a conventional In-Plane Switching pixel unit. , only with pixel electrodes and common

電極,不具有辅助電極層。相對地,本發明之實施例在具 有辅助電極層之藍相液晶顯示面板(本實施例)中,顯^ 單元具有_電極層、4素電㈣及共通電極助雷= 層是藉由-4伏的電壓差來,㈣相液晶層的厚度例 如約為3.8微米。從圖3中的二關係曲線可知,在相同穿 透率的情況下’具有輔助電極層之藍相液晶顯示面板:: 實施例)所需之驅動電壓低於具有辅助電極層之藍相液曰 顯示面板(習知技術)’因此輔助電極層所提供的橫向^ 電場有助於驅動電壓的降低。 ^ 圖4為本發明另-實施例之藍相液晶顯示面板之剖面 11 201227107 36941twf.doc/n 不:圖。請參照圖4,本實施例可以適度地更動苐—條狀 圖案P1與第二條狀圖案P2的寬度u、各個第一條狀圖案 相鄰之第二條狀圖案P2的間隔si、第三條狀圖案杓 L第Γ條狀圖案P4的寬度U以及各個第三條狀圖案P3 與相鄰之^四條狀_ P4的_ S2,以使u/si不等於The electrode does not have an auxiliary electrode layer. In contrast, in the embodiment of the present invention, in the blue phase liquid crystal display panel having the auxiliary electrode layer (this embodiment), the display unit has the _electrode layer, the four-electrode (four), and the common electrode lightning-assisted = layer is by -4 The voltage difference of volts, the thickness of the (iv) phase liquid crystal layer is, for example, about 3.8 microns. It can be seen from the two relationship curves in FIG. 3 that the driving voltage required for the 'blue phase liquid crystal display panel having the auxiliary electrode layer: the embodiment' is lower than the blue phase liquid having the auxiliary electrode layer at the same transmittance. The display panel (conventional technology) 'so the lateral electric field provided by the auxiliary electrode layer contributes to the reduction of the driving voltage. Figure 4 is a cross section of a blue phase liquid crystal display panel according to another embodiment of the present invention. 11 201227107 36941twf.doc/n No: Figure. Referring to FIG. 4, in this embodiment, the width u of the strip-shaped pattern P1 and the second strip-shaped pattern P2, the interval si of the second strip-shaped pattern P2 adjacent to each first strip-shaped pattern, and the third may be appropriately changed. The width pattern U of the strip pattern 杓L Γ strip pattern P4 and each third strip pattern P3 and _S2 of the adjacent strip _P4 are such that u/si is not equal

St換’此領域具有通常知識者僅需更動間隔S1、 f :,寬度U、寬度L2中至少一者,便可以改變⑽ =及L2/S2進而獲得所需之橫蚊電場。舉例而言,此 2有,常知識者可將間隔S2設計為間隔si之項 倍(η為正整數)。 * 1/η 於本發明之藍相液晶顯示面板具有辅助電極層,因 =發明之藍相液晶顯示面板的驅動電麈可以進一步地被 2本發配雜佳實施觸露如上,㈣並非 =本發明,任何熟習此技藝者,在不脫離本發明之 内,當可作些許之更動與潤飾,因此本發 範圍當視後附之申請專利範圍所界定者為準。 呆濩 意圖 圖式簡單說明】 圖1為本發明—實施例之藍相液晶顯示面板之剖面 不 共通:層為圖實施例之輔助電極層、畫素電極以及 曰圖3繪示出本發明實施例之具有辅助電極層 曰曰如面板以及比較例不具有輔助電極層之藍相液晶顯= 12 201227107, 36941twf.doc/n 面板的驅動電壓-穿透率曲線(V-T curves)。 圖4為本發明另一貫施例之藍相液晶顯不面板之剖面 示意圖。 【主要元件符號說明】 100 ·藍相液晶顯不面板 110 :第一基板 120 :第二基板 • 112 :顯示單元 112a :晝素電極 112b :共通電極 112c :開關元件 130 :輔助電極層 132 :第一電極 134 :第二電極 140 :藍相液晶層 • P1:第一條狀圖案 P2 :第二條狀圖案 P3 :第三條狀圖案 P4 :第四條狀圖案 LI、L2 :寬度 SI、S2 :間隔 E1 ·橫向定電場 E2 .橫向電場 13St. The general knowledge in this field requires only changing at least one of the interval S1, f:, width U, and width L2 to change (10) = and L2/S2 to obtain the desired horizontal mosquito electric field. For example, if there is a common knowledge, the interval S2 can be designed as a multiple of the interval si (η is a positive integer). * 1 / η The blue phase liquid crystal display panel of the present invention has an auxiliary electrode layer, because the driving power of the blue phase liquid crystal display panel of the invention can be further exposed by the above two methods, and (4) is not the present invention. Any person skilled in the art will be able to make some changes and refinements without departing from the invention. Therefore, the scope of this application is subject to the definition of the patent application scope. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a blue phase liquid crystal display panel of the present invention. The layers are the auxiliary electrode layer and the pixel electrode of the embodiment of the present invention. FIG. 3 illustrates the implementation of the present invention. For example, a blue-phase liquid crystal having an auxiliary electrode layer such as a panel and a comparative example without an auxiliary electrode layer has a driving voltage-transmission curve (VT curves) of a panel of 201227107, 36941 twf.doc/n. Fig. 4 is a cross-sectional view showing a blue phase liquid crystal display panel according to another embodiment of the present invention. [Description of main component symbols] 100: Blue phase liquid crystal display panel 110: First substrate 120: Second substrate • 112: Display unit 112a: Alizarin electrode 112b: Common electrode 112c: Switching element 130: Auxiliary electrode layer 132: One electrode 134: second electrode 140: blue phase liquid crystal layer • P1: first strip pattern P2: second strip pattern P3: third strip pattern P4: fourth strip pattern LI, L2: width SI, S2 : interval E1 · lateral fixed electric field E2. transverse electric field 13

Claims (1)

201227107」 36941twf.doc/n 七、申請專利範圍: 1. 一種藍相液晶顯示面板,包括: 一第一基板,具有多個顯示單元,每一顯示單元包括: 一晝素電極,該晝素電極具有多個第一條狀圖 案;以及 一共通電極,與該畫素電極電性絕緣,該共通電 極具有多個第二條狀圖案,而該些第一條狀圖案與該 些第二條狀圖案係交替排列; 一第二基板,與該第一基板相對配置; φ 一輔助電極層,配置在該第二基板上,且面對該些顯 不早元’該輔助電極層與該晝素電極以及該共通電極電性 絕緣,且該輔助電極層提供一橫向定電場;以及 一藍相液晶層,配置於該第一基板與該第二基板之 間。 2. 如申請專利範圍第1項所述之顯示單元,更包括一 開關元件,與該晝素電極電性連接。 3. 如申請專利範圍第1項所述之顯示單元,其中該輔 助電極層包括: _ 一第一電極,具有多個第三條狀圖案;以及 一第二電極,具有多個第四條狀圖案,且該些第三條 狀圖案與該些第四條狀圖案係交替排列。 4. 如申請專利範圍第3項所述之顯示單元,其中該些 第一條狀圖案與該些第二條狀圖案的寬度為L1,各該第一 條狀圖案與相鄰之第二條狀圖案的間隔為S1,該些第三條 狀圖案與該些第四條狀圖案的寬度為L2,各該第三條狀圖 14 36941twf.doc/n 201227107 而L1實質上等於 案與相鄰之苐四條狀圖案的間隔為S2, L2,且S1實質上等於S2 〇 5.如申請專利範圍第3項所述之顯示單元,i中該此 第-條狀圖案與該些第二條狀圖案的寬度$ l ι,各^第二 條狀圖案與相鄰之第二條狀圖案的間隔為s丨,該些第 =圖案與該些第四條狀_的寬度,各該匕餘圖 案與相鄰之第四條狀圖案的間隔為S2,且U/S1 L2/S2。201227107" 36941twf.doc/n VII. Patent Application Range: 1. A blue phase liquid crystal display panel comprising: a first substrate having a plurality of display units, each display unit comprising: a halogen electrode, the halogen electrode Having a plurality of first strip patterns; and a common electrode electrically insulated from the pixel electrode, the common electrode having a plurality of second strip patterns, and the first strip patterns and the second strip patterns The pattern is alternately arranged; a second substrate is disposed opposite to the first substrate; φ an auxiliary electrode layer disposed on the second substrate and facing the display element and the auxiliary element The electrode and the common electrode are electrically insulated, and the auxiliary electrode layer provides a lateral fixed electric field; and a blue phase liquid crystal layer is disposed between the first substrate and the second substrate. 2. The display unit according to claim 1, further comprising a switching element electrically connected to the halogen electrode. 3. The display unit of claim 1, wherein the auxiliary electrode layer comprises: a first electrode having a plurality of third strip patterns; and a second electrode having a plurality of fourth strips a pattern, and the third strip patterns are alternately arranged with the fourth strip patterns. 4. The display unit of claim 3, wherein the first strip pattern and the second strip pattern have a width L1, each of the first strip patterns and the adjacent second strip The interval between the patterns is S1, the widths of the third strip patterns and the fourth strip patterns are L2, and each of the third strip patterns 14 36941twf.doc/n 201227107 and L1 is substantially equal to the case and adjacent The spacing between the four strip patterns is S2, L2, and S1 is substantially equal to S2 〇 5. The display unit described in item 3 of the patent application, the first strip pattern and the second strip in i The width of the pattern is ι, and the interval between the second strip pattern and the adjacent second strip pattern is s丨, the width of the second pattern and the fourth strip _, each of the remaining patterns The interval from the adjacent fourth strip pattern is S2, and U/S1 L2/S2. ★ 一 6.如申請專利範圍第3項所述之顯示單元,其中該些 第二條狀圖案與該些第四條狀圖案的固定電壓差低於該藍 相液晶層的啟始電壓。 7.種藍相液晶顯示面板的驅動方法,適於驅動申請 專利範圍第1項所述之藍相液晶顯示面板,該藍相液晶顯 不面板的驅動方法包括: 驅動該輔助電極層’以使該輔助電極層產生該橫向定 電場;以及 一 驅動該晝素電極與該共通電極,以使該藍相液晶層顯 示—影像。 、8.如申請專利範圍第7項所述之顯示單元的驅動方 法其中δ亥辅助電極層包括一第^•電極以及一第二電極, 該第一電極具有多個第三條狀圖案,該第二電極具有多個 ^四條狀圖案,該些第三條狀圖案與該些第四條狀圖案係 父替排列’而驅動該輔助電極層^^法包括: 令該些第三條狀圖案與該此第四條狀圖案維持一固 定電壓差。 〃 ν > 15 201227107 9. 如申請專利範圍第7項所述之顯示單元的驅動方 法,其中該橫向定電場係於驅動該晝素電極與該共通電極 之前形成。 10. 如申請專利範圍第7項所述之顯示單元的驅動方 法,其中該橫向定電場係於驅動該晝素電極與該共通電極 的同時形成。The display unit according to claim 3, wherein the fixed voltage difference between the second strip patterns and the fourth strip patterns is lower than the starting voltage of the blue phase liquid crystal layer. 7. A blue phase liquid crystal display panel driving method, which is suitable for driving a blue phase liquid crystal display panel according to claim 1, wherein the blue phase liquid crystal display panel driving method comprises: driving the auxiliary electrode layer 'to The auxiliary electrode layer generates the lateral fixed electric field; and drives the halogen electrode and the common electrode to cause the blue phase liquid crystal layer to display an image. 8. The driving method of the display unit according to claim 7, wherein the δ海 auxiliary electrode layer comprises a second electrode and a second electrode, the first electrode having a plurality of third strip patterns, The second electrode has a plurality of four strip patterns, and the third strip patterns and the fourth strip patterns are arranged in a parent's order to drive the auxiliary electrode layer, and the method includes: causing the third strip patterns Maintaining a fixed voltage difference with the fourth strip pattern. The driving method of the display unit according to claim 7, wherein the lateral fixed electric field is formed before driving the halogen electrode and the common electrode. 10. The driving method of the display unit according to claim 7, wherein the lateral fixed electric field is formed while driving the halogen electrode and the common electrode. 1616
TW99146634A 2010-12-29 2010-12-29 Blue phase liquid crystal display panel and driving method thereof TWI418905B (en)

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