TW202322081A - Cholesterol liquid crystal display device - Google Patents
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Description
本發明涉及液晶顯示技術領域,特別是關於一種膽固醇液晶顯示裝置。The invention relates to the technical field of liquid crystal display, in particular to a cholesteric liquid crystal display device.
膽固醇液晶顯示器是液晶顯示器的一種,其中膽固醇液晶具有雙穩態特性:也就是說在無外力施加的狀態下有兩個穩定的狀態,這是與現今普遍使用的TFT液晶顯示器與OLED顯示器最大的差異。Cholesteric liquid crystal display is a kind of liquid crystal display, in which cholesteric liquid crystal has bistable characteristics: that is to say, there are two stable states when no external force is applied, which is the biggest difference with the TFT liquid crystal display and OLED display commonly used today. difference.
膽固醇液晶分子排列具有焦點圓錐排列狀態(Focal Conic State)與平面排列狀態(Planar State)兩種穩定狀態,因此具有雙穩態特性,亦即膽固醇液晶不需要外界給予額外的能量即可維持原本的液晶分子排列狀態。當施加一個電壓時,可控制膽固醇液晶分子的排列狀態在焦點圓錐排列狀態與平面排列狀態兩種穩態之間轉換。The molecular arrangement of cholesteric liquid crystals has two stable states: focal conic state (Focal Conic State) and planar state (Planar State), so it has bistable characteristics, that is, cholesteric liquid crystals can maintain the original state without external energy. Alignment state of liquid crystal molecules. When a voltage is applied, the alignment state of the cholesteric liquid crystal molecules can be controlled to switch between the focal conic alignment state and the planar alignment state.
目前的膽固醇液晶顯示器通常會存在Crosstalk問題,干擾了畫面顯示狀態。Crosstalk是指在多路電壓驅動的情況下,當對選中的像素施加電壓時,其附近未被選中的像素會因漏電流的影響而呈現出一定的顯示狀態。也就是說,選中的像素周圍的其他像素也會呈現出一定的顯示狀態,造成了干擾。The current cholesteric liquid crystal display usually has a Crosstalk problem, which interferes with the display status of the picture. Crosstalk means that in the case of multi-channel voltage driving, when a voltage is applied to a selected pixel, the nearby unselected pixels will show a certain display state due to the influence of leakage current. That is to say, other pixels around the selected pixel will also show a certain display state, causing interference.
因此,本發明的主要目的在於提供一種膽固醇液晶顯示裝置,以解決上述問題。Therefore, the main purpose of the present invention is to provide a cholesteric liquid crystal display device to solve the above problems.
本發明的目的在於提供一種膽固醇液晶顯示裝置,可避免膽固醇液晶顯示裝置上發生Crosstalk,避免未被選中的像素也呈現出顯示狀態,保證了膽固醇液晶顯示裝置的顯示性能。The object of the present invention is to provide a cholesteric liquid crystal display device, which can prevent Crosstalk from occurring on the cholesteric liquid crystal display device, prevent unselected pixels from displaying a display state, and ensure the display performance of the cholesteric liquid crystal display device.
為達所述優點至少其中之一或其他優點,本發明的一實施例提出一種膽固醇液晶顯示裝置。此膽固醇液晶顯示裝置包括複數個寫入端與複數個掃描端。In order to achieve at least one of the above advantages or other advantages, an embodiment of the present invention provides a cholesteric liquid crystal display device. The cholesteric liquid crystal display device includes a plurality of writing terminals and a plurality of scanning terminals.
複數寫入端沿一第一方向排列,並具有亮態電壓與暗態電壓。 複數掃描端沿一第二方向排列, 並具有選擇態電壓與非選擇態電壓。該些寫入端與該些掃描端相互交叉以形成複數交叉點,每個交叉點的電信號用於控制一像素。其中,將同一時間段的該亮態電壓與該非選擇態電壓的差值的絕對值定義為第一電壓差,將同一時間段的該暗態電壓與該非選擇態電壓的差值的絕對值定義為第二電壓差,該第二電壓差小於該第一電壓差。The plurality of writing terminals are arranged along a first direction, and have a bright state voltage and a dark state voltage. The plurality of scanning terminals are arranged along a second direction, and have a selected state voltage and a non-selected state voltage. The writing terminals and the scanning terminals intersect each other to form a plurality of intersections, and the electrical signal at each intersection is used to control a pixel. Wherein, the absolute value of the difference between the bright state voltage and the non-selected state voltage in the same time period is defined as the first voltage difference, and the absolute value of the difference between the dark state voltage and the non-selected state voltage in the same time period is defined as is a second voltage difference, and the second voltage difference is smaller than the first voltage difference.
在一些實施例中,每個交叉點的電信號用於控制像素呈亮態或暗態,當對像素施加該亮態電壓與該選擇態電壓時,像素呈現亮態,當對像素施加該暗態電壓與該選擇態電壓時,像素呈現暗態。In some embodiments, the electrical signal at each intersection is used to control the pixel to be in a bright state or a dark state, when the bright state voltage and the selection state voltage are applied to the pixel, the pixel is in a bright state, and when the dark state is applied to the pixel When the state voltage is equal to the selected state voltage, the pixel is in a dark state.
在一些實施例中,該第一方向垂直於該第二方向。In some embodiments, the first direction is perpendicular to the second direction.
在一些實施例中,該膽固醇液晶顯示裝置是使用動態驅動方式驅動電壓。In some embodiments, the cholesteric liquid crystal display device uses a dynamic driving method to drive voltage.
在一些實施例中,該第二電壓差與該第一電壓差的比值範圍為0.7~0.8。In some embodiments, the ratio of the second voltage difference to the first voltage difference ranges from 0.7 to 0.8.
在一些實施例中,該膽固醇液晶顯示裝置是使用被動驅動方式驅動電壓。In some embodiments, the cholesteric liquid crystal display device is driven by passive driving voltage.
在一些實施例中,該第二電壓差與該第一電壓差的比值範圍為0.8~0.95。In some embodiments, a ratio of the second voltage difference to the first voltage difference ranges from 0.8 to 0.95.
為達所述優點至少其中之一或其他優點,本發明的另一實施例進一步提出一種膽固醇液晶顯示裝置。此膽固醇液晶顯示裝置包括複數個寫入端與複數個掃描端。In order to achieve at least one of the above advantages or other advantages, another embodiment of the present invention further provides a cholesteric liquid crystal display device. The cholesteric liquid crystal display device includes a plurality of writing terminals and a plurality of scanning terminals.
複數寫入端沿一第一方向排列,並具有亮態電壓與暗態電壓。 複數掃描端沿一第二方向排列, 並具有選擇態電壓與非選擇態電壓。該些寫入端與該些掃描端相互交叉以形成複數交叉點,每個交叉點的電信號用於控制一像素。其中,該非選擇態電壓的絕對值大於該亮態電壓的絕對值與該暗態電壓的絕對值之和的1/2。The plurality of writing terminals are arranged along a first direction, and have a bright state voltage and a dark state voltage. The plurality of scanning terminals are arranged along a second direction, and have a selected state voltage and a non-selected state voltage. The writing terminals and the scanning terminals intersect each other to form a plurality of intersections, and the electrical signal at each intersection is used to control a pixel. Wherein, the absolute value of the non-selected state voltage is greater than 1/2 of the sum of the absolute value of the bright state voltage and the absolute value of the dark state voltage.
在一些實施例中,該非選擇態電壓的絕對值小於該該暗態電壓的絕對值。In some embodiments, the absolute value of the non-selected state voltage is smaller than the absolute value of the dark state voltage.
在一些實施例中,該暗態電壓的絕對值大於該亮態電壓的絕對值。In some embodiments, the absolute value of the dark-state voltage is greater than the absolute value of the bright-state voltage.
因此,利用本發明所提供之膽固醇液晶顯示裝置,藉由第二電壓差小於第一電壓差的設置,來避免膽固醇液晶顯示裝置上發生Crosstalk,避免未被選中的像素也呈現出顯示狀態,保證了膽固醇液晶顯示裝置的顯示性能。Therefore, using the cholesteric liquid crystal display device provided by the present invention, by setting the second voltage difference smaller than the first voltage difference, Crosstalk can be avoided on the cholesteric liquid crystal display device, and unselected pixels can also be prevented from displaying a display state. The display performance of the cholesteric liquid crystal display device is guaranteed.
此外,還可藉由非選擇態電壓的絕對值大於亮態電壓的絕對值與暗態電壓的絕對值之和的1/2的設置,來避免膽固醇液晶顯示裝置上發生Crosstalk,避免未被選中的像素也呈現出顯示狀態,保證了膽固醇液晶顯示裝置的顯示性能。In addition, by setting the absolute value of the non-selected state voltage to be greater than 1/2 of the sum of the absolute value of the bright state voltage and the absolute value of the dark state voltage, Crosstalk can be avoided on the cholesteric liquid crystal display device, and the non-selected state can be avoided. The pixels in the cholesteric liquid crystal display device also exhibit a display state, which ensures the display performance of the cholesteric liquid crystal display device.
上述說明僅是本發明技術方案的概述,為了能夠更清楚瞭解本發明的技術手段,而可依照說明書的內容予以實施,並且為了讓本發明的上述和其他目的、特徵和優點能夠更明顯易懂,以下特舉較佳實施例,並配合圖式,詳細說明如下。The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the preferred embodiments are specifically cited below, together with the drawings, and detailed descriptions are as follows.
本文所公開的具體結構和功能細節僅僅是代表性的,並且是用於描述本發明的示例性實施例的目的。但是本發明可以通過許多替換形式來具體實現,並且不應當被解釋成僅僅受限於本文所闡述的實施例。Specific structural and functional details disclosed herein are representative only and are for purposes of describing example embodiments of the invention. This invention may, however, be embodied in many alternative forms and should not be construed as limited to only the embodiments set forth herein.
在本發明的描述中,需要理解的是,術語“中心”、“橫向”、“上”、“下”、“左”、“右”、“豎直”、“水平”、“頂”、“底”、“內”、“外”等指示的方位或位置關係基於附圖所示的方位或位置關係,僅是為了便於描述本發明和簡化描述,而不是指示或暗示所指的裝置或組件必須具有特定的方位、以特定的方位構造和操作,因此不能理解為對本發明的限制。此外,術語“第一”、“第二”僅用於描述目的,而不能理解為指示或暗示相對重要性或者隱含指明所指示的技術特徵的數量。由此,限定有“第一”、“第二”的特徵可以明示或者隱含地包括一個或者更多個該特徵。在本發明的描述中,除非另有說明,“多個”的含義是兩個或兩個以上。另外,術語“包括”及其任何變形,意圖在於覆蓋不排他的包含。In describing the present invention, it is to be understood that the terms "central", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or positional relationship. The components must have a particular orientation, be constructed, and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Additionally, the term "comprise" and any variations thereof, are intended to cover a non-exclusive inclusion.
在本發明的描述中,需要說明的是,除非另有明確的規定和限定,術語“安裝”、“相連”、“連接”應做廣義理解,例如,可以是固定連接,也可以是可拆卸連接,或一體地連接;可以是機械連接,也可以是電連接;可以是直接相連,也可以通過中間媒介間接相連,可以是兩個組件內部的連通。對於本領域的普通技術人員而言,可以具體情況理解上述術語在本發明中的具體含義。In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
本文所使用的術語僅僅是為了描述具體實施例而非意圖限制示例性實施例。除非上下文明確地另有所指,否則本文所使用的單數形式“一個”、“一項”還意圖包括複數。還應當理解的是,本文所使用的術語“包括”和/或“包含”規定所陳述的特徵、整數、步驟、操作、單元和/或組件的存在,而不排除存在或添加一個或更多其他特徵、整數、步驟、操作、單元、組件和/或其組合。The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the exemplary embodiments. As used herein, the singular forms "a", "an" and "an" are also intended to include the plural unless the context clearly dictates otherwise. It should also be understood that the term "comprises" and/or "comprises" as used herein specifies the presence of stated features, integers, steps, operations, units and/or components and does not exclude the presence or addition of one or more Other features, integers, steps, operations, units, components and/or combinations thereof.
請參閱圖1和圖2,圖1是本發明膽固醇液晶顯示裝置10的示意圖,圖2是圖1所示的膽固醇液晶顯示裝置10的運作示意圖。為達所述優點至少其中之一或其他優點,本發明的一實施例提供一種膽固醇液晶顯示裝置10。如圖中所示,膽固醇液晶顯示裝置10包括複數寫入端12與複數掃描端14。Please refer to FIGS. 1 and 2 . FIG. 1 is a schematic diagram of the cholesteric liquid
複數寫入端12是沿第一方向X排列,並具有亮態電壓W與暗態電壓B,在圖1中以B和箭頭方向表示此寫入端12施加的是暗態電壓B,以W和箭頭方向表示此寫入端12施加的是亮態電壓W。複數掃描端14是沿第二方向Z排列,並具有選擇態電壓Y與非選擇態電壓N,在圖1中以N和箭頭方向表示此掃描端14施加的是非選擇態電壓N,以Y和箭頭方向表示此掃描端14施加的是選擇態電壓Y。The plurality of write-in
該些個寫入端12與該些個掃描端14是相互交叉以形成複數個交叉點,每個交叉點的電信號用於控制像素。具體來說,如圖所示,當對像素A1同時施加亮態電壓W與選擇態電壓Y時,像素A1呈現為亮態;當對像素A2同時施加暗態電壓B與選擇態電壓Y時,像素A2呈現為暗態;當對像素A3同時施加亮態電壓W與非選擇態電壓N時,像素A3不發生改變,將維持原來的顏色;當對像素A4同時施加暗態電壓B與非選擇態電壓N時,像素A4不發生改變,將維持原來的顏色。換言之,每個交叉點的電信號用於控制像素呈亮態或暗態,當對像素施加該亮態電壓W與該選擇態電壓Y時,像素呈現亮態,當對像素施加該暗態電壓B與該選擇態電壓Y時,像素呈現暗態。The
所述亮態與暗態是指像素的明亮程度,例如,暗紅色、暗綠色等暗色是屬於像素的暗態,亮紅色、亮綠色等亮色是屬於像素的亮態。在一實施例中,第一方向X是垂直於第二方向Z,以形成矩陣狀排布的交叉點,利於施加電壓和控制像素。The bright state and dark state refer to the brightness of the pixel. For example, dark colors such as dark red and dark green belong to the dark state of the pixel, and bright colors such as bright red and bright green belong to the bright state of the pixel. In one embodiment, the first direction X is perpendicular to the second direction Z to form intersections arranged in a matrix, which is convenient for applying voltage and controlling pixels.
如圖中所示,將同一時間段的亮態電壓W與非選擇態電壓N的差值的絕對值定義為第一電壓差V1,將同一時間段的暗態電壓B與非選擇態電壓N的差值的絕對值定義為第二電壓差V2,通過第二電壓差V2小於第一電壓差V1的設置方式,就可以有效的降低膽固醇液晶顯示裝置10上Crosstalk的發生,保證了膽固醇液晶顯示裝置10的顯示性能。舉例來說,亮態電壓W的正向電壓VP1=10V,非選擇態電壓N的正向電壓VP2=15V,暗態電壓B的正向電壓VP3=18V,則第一電壓差V1=|VP1-VP2|=5V,第二電壓差V2=|VP3-VP2|=3V,即V2<V1,有效降低膽固醇液晶顯示裝置10上Crosstalk的發生。As shown in the figure, the absolute value of the difference between the bright state voltage W and the non-selected state voltage N in the same time period is defined as the first voltage difference V1, and the dark state voltage B and the non-selected state voltage N in the same time period The absolute value of the difference is defined as the second voltage difference V2. By setting the second voltage difference V2 smaller than the first voltage difference V1, the occurrence of Crosstalk on the cholesteric liquid
此外,還可通過非選擇態電壓N的絕對值大於亮態電壓W的絕對值與暗態電壓B的絕對值之和的1/2的方式,來保證第二電壓差小於第一電壓差,避免膽固醇液晶顯示裝置10上發生Crosstalk。舉例來說,亮態電壓W的正向電壓VP1=10V,暗態電壓B的正向電壓VP3=18V,則非選擇態電壓N的正向電壓VP2應大於14V,假設VP2=15V,則第一電壓差V1=|VP1-VP2|=5V,第二電壓差V2=|VP3-VP2|=3V,滿足V2<V1,可有效降低膽固醇液晶顯示裝置10上Crosstalk的發生。補充說明的是,此種方式中,非選擇態電壓N的絕對值應小於暗態電壓B的絕對值;該暗態電壓B的絕對值應大於該亮態電壓W的絕對值。In addition, the absolute value of the non-selected state voltage N is greater than 1/2 of the sum of the absolute value of the bright state voltage W and the absolute value of the dark state voltage B to ensure that the second voltage difference is smaller than the first voltage difference, Crosstalk on the cholesteric liquid
進一步地,當膽固醇液晶顯示裝置10是使用動態驅動方式驅動電壓時,如DDS (Dynamic Driving Scheme)動態驅動方式,優選將第二電壓差V2與第一電壓差V1的比值範圍控制在0.7~0.8。當膽固醇液晶顯示裝置10是使用動態驅動方式驅動電壓時,如PM (Passive Matrix)方式的PWM(Pulse Width Modulation)驅動方式,優選將第二電壓差V2與第一電壓差V1的比值範圍控制在0.8~0.95。Further, when the cholesteric liquid
綜上所述,利用本發明所提供之膽固醇液晶顯示裝置10,藉由第二電壓差V2小於第一電壓差V1的設置,來避免膽固醇液晶顯示裝置10上發生Crosstalk,避免未被選中的像素也呈現出顯示狀態,保證了膽固醇液晶顯示裝置10的顯示性能。此外,還可藉由非選擇態電壓N的絕對值大於亮態電壓W的絕對值與暗態電壓B的絕對值之和的1/2的設置,來避免膽固醇液晶顯示裝置10上發生Crosstalk,避免未被選中的像素改變顯示狀態,保證了膽固醇液晶顯示裝置10的顯示性能。In summary, using the cholesteric liquid
藉由以上較佳具體實施例的詳述,是希望能更加清楚描述本發明的特徵與精神,而並非以上述所揭露的較佳具體實施例來對本發明的範疇加以限制。相反地,其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請的專利範圍的範疇內。Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claimed patent scope of the present invention.
10:膽固醇液晶顯示裝置 12:寫入端 14:掃描端 A1、A2、A3、A4:像素 B:暗態電壓 W:亮態電壓 N:非選擇態電壓 Y:選擇態電壓 X:第一方向 Z:第二方向 V1:第一電壓差 V2:第二電壓差 10: Cholesterol liquid crystal display device 12: Write terminal 14: Scanning end A1, A2, A3, A4: pixels B: dark state voltage W: bright state voltage N: Non-selection state voltage Y: select state voltage X: first direction Z: the second direction V1: first voltage difference V2: second voltage difference
所包括的圖式用來提供對本申請實施例的進一步的理解,其構成了說明書的一部分,用於例示本申請的實施方式,並與文字描述一起來闡釋本申請的原理。顯而易見地,下面描述中的圖式僅僅是本申請的一些實施例,對於本領域普通技術人員來講,在不付出創造性勞動的前提下,還可以根據這些圖式獲得其他的圖式。在圖式中: [圖1]是本發明膽固醇液晶顯示裝置的示意圖。 [圖2]是圖1所示的膽固醇液晶顯示裝置的運作示意圖。 The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present application, and explain the principle of the present application together with the text description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. In the schema: [ Fig. 1 ] is a schematic diagram of a cholesteric liquid crystal display device of the present invention. [ FIG. 2 ] is a schematic diagram of the operation of the cholesteric liquid crystal display device shown in FIG. 1 .
10:膽固醇液晶顯示裝置 10: Cholesterol liquid crystal display device
12:寫入端 12: Write terminal
14:掃描端 14: Scanning end
A1、A2、A3、A4:像素 A1, A2, A3, A4: pixels
B:暗態電壓 B: dark state voltage
W:亮態電壓 W: bright state voltage
N:非選擇態電壓 N: Non-selection state voltage
Y:選擇態電壓 Y: select state voltage
X:第一方向 X: first direction
Z:第二方向 Z: the second direction
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