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CN100498442C - Multi-domain liquid crystal display - Google Patents

Multi-domain liquid crystal display Download PDF

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CN100498442C
CN100498442C CNB2006100763696A CN200610076369A CN100498442C CN 100498442 C CN100498442 C CN 100498442C CN B2006100763696 A CNB2006100763696 A CN B2006100763696A CN 200610076369 A CN200610076369 A CN 200610076369A CN 100498442 C CN100498442 C CN 100498442C
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liquid crystal
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metal layer
pixel electrode
common electrode
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CN101059608A (en
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王文俊
李建璋
刘锦璋
蔡哲福
周怡伶
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Wintek Corp
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Abstract

A multi-domain liquid crystal display comprises a color filter substrate, an active element array substrate and a liquid crystal layer interposed therebetween. The color filter substrate is provided with a first common electrode, and the active element array substrate is provided with a second common electrode and a pixel electrode. The second common electrode surrounds the pixel electrode to generate an edge electric field in cooperation with the pixel electrode. The invention overcomes the defects of the prior art, each liquid crystal molecule is vertically aligned under the state of no voltage (Voff), so that redundant optical path difference value (delta nd is 0) can not be generated, and the light leakage phenomenon can be avoided; on the other hand, compared with the known method of forming slits at the electrodes, the invention can provide stronger liquid crystal molecule tilting force by the fringe electric field effect generated by the voltage difference between the second common electrode and the pixel electrode, and can reduce the formation of misoriented defect regions to effectively improve the overall light transmittance.

Description

多域液晶显示器 Multi-domain LCD

技术领域 technical field

本发明涉及一种多域液晶显示器,尤其是指一种利用边缘电场效应(fringefield effect)获得广视角效果的多域液晶显示器。The invention relates to a multi-domain liquid crystal display, in particular to a multi-domain liquid crystal display which utilizes a fringe field effect (fringefield effect) to obtain a wide viewing angle effect.

背景技术 Background technique

公知利用介电各向异性(dielectric anisotropy)为负的负型液晶材料,构成垂直配向(vertical alignment)或同向式配向(homeotropic alignment)的液晶配向方式,因未施加电压时液晶分子即以垂直基板方式排列,故可提供良好的对比(contrast)表现。然而,一垂直配向式液晶显示器(vertically alignedLCD)通常在不同观察角度的灰阶(gray level)显示状态下具有不佳的视角特性。因此,不同的公知设计被提出以改善上述情况。It is known that a negative type liquid crystal material with a negative dielectric anisotropy is used to form a liquid crystal alignment method of vertical alignment or homeotropic alignment. When no voltage is applied, the liquid crystal molecules are aligned vertically. Arranged in the form of substrates, it can provide good contrast (contrast) performance. However, a vertically aligned LCD (vertically aligned LCD) usually has poor viewing angle characteristics in gray level display states at different viewing angles. Therefore, different known designs have been proposed to improve the above situation.

图1A为剖面示意图,显示一公知多域垂直配向液晶显示器(multi-domainvertically aligned LCD;MVA LCD)的设计。如图1A所示,其是在上、下基板102、104上分别形成凸体(bump)106,其上再形成覆盖凸体(bump)106的垂直配向膜108,使垂直配向的液晶分子112在未施加电压时即具有朝不同方向倾斜的预倾角(pre-tilt angle),以控制施加电压后的液晶分子112倾斜方向。当施加电压后,液晶层即可分割为多个分别具不同倾斜方向的液晶微域,以有效改善不同观察角度的灰阶显示状态下的视角特性。再者,作为提供预倾角的域边界规制结构(regulation structure)并不限定为凸体106,亦可如图1B所示,于基板114上形成凹面结构116亦可。FIG. 1A is a schematic cross-sectional view showing the design of a known multi-domain vertically aligned LCD (multi-domain vertically aligned LCD; MVA LCD). As shown in FIG. 1A, bumps 106 are formed on the upper and lower substrates 102 and 104 respectively, and a vertical alignment film 108 covering the bumps 106 is formed on the upper and lower substrates 102 and 104, so that the vertically aligned liquid crystal molecules 112 When no voltage is applied, there are pre-tilt angles that tilt in different directions, so as to control the tilt direction of the liquid crystal molecules 112 after voltage is applied. After the voltage is applied, the liquid crystal layer can be divided into a plurality of liquid crystal micro-domains with different inclination directions, so as to effectively improve the viewing angle characteristics of the gray scale display states at different viewing angles. Furthermore, the domain boundary regulation structure for providing the pretilt angle is not limited to the convex body 106 , and a concave surface structure 116 may also be formed on the substrate 114 as shown in FIG. 1B .

如图1A及图1B所示,形成凸体106或凹面结构116方式虽可达到制造多个液晶微域的效果,然而,在未施加电压(Voff)的状态下,比较穿透光I1及I2的光路可知,因该域边界规制结构会导致液晶配向并非完全垂直,故行经倾斜液晶分子的穿透光I2光路会具有多余的光程差值(△nd≠0)而造成漏光。因此,另需通过外贴补偿膜的方式将漏光消除以提高对比。As shown in Fig. 1A and Fig. 1B, although the method of forming convex body 106 or concave surface structure 116 can achieve the effect of manufacturing a plurality of liquid crystal micro-domains, however, in the state of no voltage (Voff), comparing the transmitted light I1 and The optical path of I 2 shows that the liquid crystal alignment is not completely vertical due to the domain boundary regulation structure, so the optical path of the transmitted light I 2 passing through the tilted liquid crystal molecules will have redundant optical path difference (△nd≠0) and cause light leakage. Therefore, it is necessary to eliminate the light leakage by attaching a compensation film to improve the contrast.

图2为一剖面示意图,显示另一多域垂直配向液晶显示器的结构。如图2所示,利用在基板202的透明电极204上所形成的开缝(slit)206,可控制液晶分子208在施加电压后的倾倒方向。然而,在电极204处形成开缝206的方式须仔细考虑上下基板的配向误差、开缝206本身宽度以及两开缝206之间的距离等等,否则通过开缝206产生使液晶分子208倾倒的力量容易不足。再者,该形成开缝206的结构,造成液晶分子208往左右任一方向转动的能量相等,而使液晶分子208在空间中的配向分布产生不连续的错向缺陷(disclination)。该错向缺陷区域210在开缝206上方及两开缝206间皆容易形成,而降低整体光穿透率。FIG. 2 is a schematic cross-sectional view showing the structure of another multi-domain vertical alignment liquid crystal display. As shown in FIG. 2 , by using the slit 206 formed on the transparent electrode 204 of the substrate 202 , the tilting direction of the liquid crystal molecules 208 after voltage is applied can be controlled. However, the way of forming the slit 206 at the electrode 204 must carefully consider the alignment error of the upper and lower substrates, the width of the slit 206 itself, and the distance between the two slits 206, etc. Otherwise, the liquid crystal molecules 208 will fall due to the slit 206. The strength is easily insufficient. Furthermore, the structure of the slits 206 causes the energy of the liquid crystal molecules 208 to rotate in either direction to be equal, so that the alignment distribution of the liquid crystal molecules 208 in space produces discontinuous disclination. The misalignment defect region 210 is easily formed above the slit 206 and between the two slits 206 , thereby reducing the overall light transmittance.

发明内容 Contents of the invention

本发明要解决的技术问题是:提供一种多域液晶显示器,其能改善上述公知结构的种种问题。The technical problem to be solved by the present invention is to provide a multi-domain liquid crystal display, which can improve various problems of the above-mentioned known structures.

本发明的技术解决方案是:一种多域液晶显示器,其包含:The technical solution of the present invention is: a kind of multi-domain liquid crystal display, it comprises:

彼此相向的一第一透明基板及一第二透明基板;a first transparent substrate and a second transparent substrate facing each other;

一液晶层,介设于该第一透明基板及该第二透明基板间,该液晶层是由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer interposed between the first transparent substrate and the second transparent substrate, the liquid crystal layer is composed of liquid crystal molecular materials with negative dielectric anisotropy;

一第一共用电极,设置于该第一透明基板上;a first common electrode disposed on the first transparent substrate;

多道彼此正交的扫描线及数据线,形成于该第二透明基板上,两相邻的扫描线及两相邻的数据线界定出一像素区域;A plurality of scan lines and data lines orthogonal to each other are formed on the second transparent substrate, and two adjacent scan lines and two adjacent data lines define a pixel area;

对应该像素区域设置的一切换元件;a switch element set corresponding to the pixel area;

一第一介电层,形成于该第二透明基板上并覆盖该扫描线;a first dielectric layer formed on the second transparent substrate and covering the scanning line;

一第二介电层,形成于该第一介电层上并覆盖该数据线;a second dielectric layer formed on the first dielectric layer and covering the data line;

一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer;

一第三介电层,形成于该第二透明基板上并覆盖该像素电极;及a third dielectric layer formed on the second transparent substrate and covering the pixel electrode; and

一第二共用电极,形成于该第三介电层上,该第二共用电极包含多个条状区段,所述条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成(induced,引致)区,以产生多个具有不同液晶分子倾斜方向的液晶微域。a second common electrode formed on the third dielectric layer, the second common electrode includes a plurality of strip-shaped sections, and the strip-shaped sections define a plurality of surrounding areas overlapped with the pixel electrode, and Each strip section and the pixel electrode form a fringe electric field induced area to generate a plurality of liquid crystal micro-domains with different tilt directions of liquid crystal molecules.

本发明还提出另一种多域液晶显示器,其包含:The present invention also proposes another multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一共用电极;A filter substrate on which a common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线及该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line and the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;a second dielectric layer covering the second metal layer;

一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer;

一第三介电层,覆盖该像素电极;及a third dielectric layer covering the pixel electrode; and

一第三金属层,形成于该第三介电层上且电连接该共用电极;及a third metal layer formed on the third dielectric layer and electrically connected to the common electrode; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第三金属层围绕该像素电极且协同该像素电极形成一边缘电场,以产生多个具有不同液晶分子倾斜方向的液晶微域。Wherein the third metal layer surrounds the pixel electrode and cooperates with the pixel electrode to form a fringe electric field to generate a plurality of liquid crystal micro-domains with different tilt directions of liquid crystal molecules.

本发明还提出另一种多域液晶显示器,其包含:The present invention also proposes another multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一第二共用电极、一数据线及该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a second common electrode, a data line and the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and

一像素电极,形成于该第二介电层上;及a pixel electrode formed on the second dielectric layer; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第二共用电极围绕该像素电极分布且协同该像素电极形成一边缘电场,以产生多个具不同液晶分子倾斜方向的液晶微域。Wherein the second common electrode is distributed around the pixel electrode and cooperates with the pixel electrode to form a fringe electric field, so as to generate a plurality of liquid crystal micro-domains with different tilt directions of liquid crystal molecules.

本发明还提出一种多域液晶显示器,其包含:The present invention also proposes a multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一第二共用电极、一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a second common electrode, a scanning line and a gate region of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线及该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line and the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and

一像素电极,形成于该第二介电层;及a pixel electrode formed on the second dielectric layer; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第二共用电极包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区,以产生多个具不同液晶分子倾斜方向的液晶微域。Wherein the second common electrode comprises a plurality of strip-shaped sections, each strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode , so as to produce a plurality of liquid crystal micro-domains with different tilt directions of liquid crystal molecules.

本发明还提出一种多域液晶显示器,其包含:The present invention also proposes a multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一共用电极;A filter substrate on which a common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line, the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;a second dielectric layer covering the second metal layer;

一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer;

一第三介电层,覆盖该像素电极;及a third dielectric layer covering the pixel electrode; and

一第三金属层,形成于该第三介电层上,该第三金属层具有彼此分离的第一部分及第二部分;及a third metal layer formed on the third dielectric layer, the third metal layer having first and second portions separated from each other; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第三金属层的该第一部分电连接至该共用电极,且包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该第三金属层的该第二部分形成于该围绕区域内,并构成叠合部分该像素电极的一反射层。Wherein the first part of the third metal layer is electrically connected to the common electrode, and includes a plurality of strip sections, each strip section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip section The segments and the pixel electrode constitute a fringe electric field forming region; the second part of the third metal layer is formed in the surrounding region and constitutes a reflective layer overlapping the pixel electrode.

本发明还提出一种多域液晶显示器,其包含:The present invention also proposes a multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一第二共用电极、一反射层、一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a second common electrode, a reflective layer, a data line, the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and

一像素电极,形成于该第二介电层上;及a pixel electrode formed on the second dielectric layer; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第二共用电极包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该反射层形成于该围绕区域内并叠合部分该像素电极。Wherein the second common electrode comprises a plurality of strip-shaped sections, each strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode ; The reflective layer is formed in the surrounding area and partially overlaps the pixel electrode.

本发明还提出一种多域液晶显示器,其包含:The present invention also proposes a multi-domain liquid crystal display, which includes:

一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed;

一有源元件阵列基板,包含:An active element array substrate, including:

一透明基板;a transparent substrate;

一第一金属层,形成于该透明基板上,该第一金属层界定出一第二共用电极、一扫描线、一反射层及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a second common electrode, a scanning line, a reflective layer and a gate region of a switching element;

一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer;

一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line, the drain and source regions of the switching element;

一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and

一像素电极,形成于该第二介电层;及a pixel electrode formed on the second dielectric layer; and

一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy;

其中该第二共用电极包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该反射层形成于该围绕区域内,并叠合部分该像素电极。Wherein the second common electrode comprises a plurality of strip-shaped sections, each strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode ; The reflective layer is formed in the surrounding area and partially overlaps the pixel electrode.

本发明的特点和优点是:本发明的多域液晶显示器,包含彼此相向的一第一及一第二基板、一液晶层、一第一共用电极、一切换元件、一像素电极及一第二共用电极。液晶层介设于第一及第二基板间,其是由具有负介电各向异性(negative dielectric anisotropy)的液晶分子材料所构成,且第一共用电极设置于第一基板上。多道彼此正交的扫描线及数据线形成于第二基板上,两相邻的扫描线及两相邻的数据线界定出一像素区域,且对应各个像素区域设置切换元件,切换元件例如可由一薄膜晶体管所构成。一栅极绝缘层形成于第二基板上并覆盖扫描线,且一保护层形成于栅极绝缘层上并覆盖数据线。像素电极形成于保护层上,且第二共用电极形成于该第二基板上。第二共用电极包含实质平行扫描线的多个第一条状区段、及实质平行数据线的多个第二条状区段,该些条状区段界定出与像素电极叠合的多个围绕区域,且各条状区段均与像素电极构成一边缘电场形成区,藉以产生多个具不同液晶分子倾斜方向的液晶微域。The characteristics and advantages of the present invention are: the multi-domain liquid crystal display of the present invention includes a first and a second substrate facing each other, a liquid crystal layer, a first common electrode, a switching element, a pixel electrode and a second common electrode. The liquid crystal layer is interposed between the first and second substrates, and is composed of liquid crystal molecular materials with negative dielectric anisotropy, and the first common electrode is disposed on the first substrate. Multiple scan lines and data lines orthogonal to each other are formed on the second substrate, two adjacent scan lines and two adjacent data lines define a pixel area, and switching elements are provided corresponding to each pixel area. The switching elements can be, for example, formed by composed of a thin film transistor. A gate insulating layer is formed on the second substrate and covers the scanning lines, and a protection layer is formed on the gate insulating layer and covers the data lines. The pixel electrode is formed on the protection layer, and the second common electrode is formed on the second substrate. The second common electrode includes a plurality of first strip sections substantially parallel to the scan lines and a plurality of second strip sections substantially parallel to the data lines, and these strip sections define a plurality of overlapped pixel electrodes. Surrounding the area, each strip section and the pixel electrode form a fringe electric field forming area, so as to generate a plurality of liquid crystal micro-domains with different liquid crystal molecule tilt directions.

通过本发明的设计,仅需搭配一般薄膜晶体管工艺再另形成一分布预先设计的第二共用电极,即可获得多域配向的效果。和公知利用凸体(bump)或凹面结构的设计相较,本发明于未施加电压(Voff)的状态下各个液晶分子均呈垂直配向,故不会产生多余的光程差值(△nd=0)而可避免漏光现象产生。另一方面,和公知于电极处形成开缝的方式相较,本发明通过第二共用电极与像素电极的压差所产生的边缘电场效应,可提供较强的液晶分子倾倒力量,且可减少错向缺陷区域形成而有效提升整体光穿透率。Through the design of the present invention, it is only necessary to form a second common electrode with a pre-designed distribution in combination with the general thin film transistor process to obtain the effect of multi-domain alignment. Compared with the known designs using bumps or concave structures, in the present invention, each liquid crystal molecule is vertically aligned when no voltage (Voff) is applied, so no redundant optical path difference (Δnd= 0) to avoid light leakage. On the other hand, compared with the known method of forming slits at the electrodes, the present invention can provide stronger liquid crystal molecule dumping force through the fringe electric field effect generated by the voltage difference between the second common electrode and the pixel electrode, and can reduce The misalignment defect region is formed to effectively improve the overall light transmittance.

另外,本发明可利用第二共用电极同时配置出一半透式像素结构的反射区,如此即可在不增加其他工艺步骤下,形成同时具透射及反射效果的半透式液晶显示器。In addition, the present invention can utilize the second common electrode to simultaneously configure the reflective area of the transflective pixel structure, so that a transmissive liquid crystal display with both transmissive and reflective effects can be formed without adding other process steps.

附图说明 Description of drawings

图1A为剖面示意图,显示一公知多域垂直配向液晶显示器的结构。FIG. 1A is a schematic cross-sectional view showing the structure of a conventional multi-domain vertical alignment liquid crystal display.

图1B为剖面示意图,显示另一公知多域垂直配向液晶显示器的结构。FIG. 1B is a schematic cross-sectional view showing the structure of another known multi-domain vertical alignment liquid crystal display.

图2为一剖面示意图,显示另一多域垂直配向液晶显示器的结构。FIG. 2 is a schematic cross-sectional view showing the structure of another multi-domain vertical alignment liquid crystal display.

图3为本发明的结构,显示一多域液晶显示器的局部剖面示意简图。FIG. 3 shows the structure of the present invention, showing a partial cross-sectional schematic diagram of a multi-domain liquid crystal display.

图4为依本发明一实施例,显示有源元件阵列基板上构成一像素结构的不同膜层的平面示意图。FIG. 4 is a schematic plan view showing different film layers forming a pixel structure on an active device array substrate according to an embodiment of the present invention.

图5A为沿图4的A-A’线横切而得的剖面图。Fig. 5A is a cross-sectional view taken along line A-A' of Fig. 4 .

图5B为沿图4的B-B’线横切而得的剖面图。Fig. 5B is a cross-sectional view taken along line B-B' of Fig. 4 .

图6A及图6B为说明本发明设计原理的示意图。6A and 6B are schematic diagrams illustrating the design principle of the present invention.

图7为依本发明的设计,显示液晶分子实际倾倒方向的示意图。FIG. 7 is a schematic diagram showing the actual tilting direction of liquid crystal molecules according to the design of the present invention.

图8为显示本发明共用电极分布的另一实施例示意图。FIG. 8 is a schematic diagram showing another embodiment of the common electrode distribution of the present invention.

图9为显示本发明共用电极分布的另一实施例示意图.9 is a schematic diagram showing another embodiment of the distribution of common electrodes of the present invention.

图10为显示本发明共用电极分布的另一实施例示意图。FIG. 10 is a schematic diagram showing another embodiment of the common electrode distribution of the present invention.

图11为显示本发明共用电极分布的另一实施例示意图。FIG. 11 is a schematic diagram showing another embodiment of the common electrode distribution of the present invention.

图12为依本发明的另一实施例,显示一半透式像素结构的平面示意图。FIG. 12 is a schematic plan view showing a transflective pixel structure according to another embodiment of the present invention.

图13为沿图12的C-C’线横切而得的剖面图。Fig. 13 is a cross-sectional view taken along line C-C' of Fig. 12 .

图14为依本发明的另一实施例,显示一半透式像素结构的平面示意图。FIG. 14 is a schematic plan view showing a transflective pixel structure according to another embodiment of the present invention.

图15为一剖面示意图,显示本发明的另一实施例。Fig. 15 is a schematic cross-sectional view showing another embodiment of the present invention.

图16为一剖面示意图,显示本发明的另一实施例。Fig. 16 is a schematic cross-sectional view showing another embodiment of the present invention.

图17为一示意图,显示本发明基于图16所示的实施例利用第二金属层构成一半透式像素结构反射区的设计。FIG. 17 is a schematic diagram showing the design of the present invention based on the embodiment shown in FIG. 16 using the second metal layer to form the reflection area of the semi-transparent pixel structure.

图18为沿图17的D-D’线横切而得的剖面图。Fig. 18 is a cross-sectional view taken along line D-D' of Fig. 17 .

图19为一剖面示意图,显示本发明的另一实施例。Fig. 19 is a schematic cross-sectional view showing another embodiment of the present invention.

图20为依图17的实施例设计,显示于两相邻像素区域间的内连线分布方式示意图。FIG. 20 is a schematic diagram showing the distribution of interconnection lines between two adjacent pixel regions according to the embodiment design of FIG. 17 .

图21为一示意图,显示本发明利用基于图19所示的实施例利用第一金属层构成一半透式像素结构反射区的设计。FIG. 21 is a schematic diagram showing the design of the embodiment of the present invention based on the embodiment shown in FIG. 19 using the first metal layer to form the reflective region of the semi-transparent pixel structure.

图22为沿图21的E-E’线横切而得的剖面图。Fig. 22 is a cross-sectional view taken along line E-E' of Fig. 21.

图23为显示本发明另一实施例的像素结构平面示意图。FIG. 23 is a schematic plan view showing a pixel structure according to another embodiment of the present invention.

图24为显示本发明另一实施例的像素结构平面示意图。FIG. 24 is a schematic plan view showing a pixel structure according to another embodiment of the present invention.

图25为显示本发明另一实施例的像素结构平面示意图。FIG. 25 is a schematic plan view showing a pixel structure according to another embodiment of the present invention.

图26为显示本发明另一实施例的像素结构平面示意图。FIG. 26 is a schematic plan view showing a pixel structure according to another embodiment of the present invention.

图27为一示意图,显示本发明应用圆偏光系统的一实例。Fig. 27 is a schematic diagram showing an example of the application of the present invention to a circular polarization system.

主要元件符号说明:Description of main component symbols:

10   多域液晶显示器               12   滤光片基板10 Multi-domain liquid crystal display 12 Filter substrate

14   有源元件阵列基板             16   液晶层14 Active element array substrate 16 Liquid crystal layer

18   透明基板                     20   切换元件18 Transparent substrate 20 Switching element

22   像素电极                     24   配向层22 Pixel electrode 24 Alignment layer

26   透明基板                     28   彩色滤光片26 Transparent substrate 28 Color filter

30   黑矩阵层                     32   共用电极30 Black Matrix Layer 32 Common Electrode

34   配向层                       40   像素结构34 alignment layer 40 pixel structure

42   薄膜晶体管                   42c  通道层42 thin film transistor 42c channel layer

42d  漏极                         42e  n+非晶硅层42d drain 42e n+ amorphous silicon layer

42g  栅极                         42s源极42g gate 42s source

44   扫描线                       46   数据线44 scanning line 46 data line

48   像素电极                     52   栅极绝缘层48 Pixel electrode 52 Gate insulating layer

54   保护层                       56   介电层54 Protective layer 56 Dielectric layer

58   反射层                       60   半透式像素结构58 Reflective layer 60 Semi-transparent pixel structure

62   围绕区域.                    64   液晶分子62 surrounding area. 64 liquid crystal molecules

66   平坦化层                     68、72、72’共用电极66 planarization layer 68, 72, 72’common electrode

70、70’接触孔                    74、74a、74b开缝70, 70' contact hole 74, 74a, 74b slotted

76a、76b偏光板                78a、78b  1/4波长板76a, 76b polarizer 78a, 78b 1/4 wavelength plate

102、104  基板                106  凸体102, 104 Substrate 106 Convex body

108  配向膜                   112  液晶分子108 Alignment film 112 Liquid crystal molecules

116  凹面结构                 202  基板116 Concave structure 202 Substrate

204  电极                     206  开缝204 Electrode 206 Slit

208  液晶分子                 210  错向缺陷区域208 Liquid crystal molecules 210 Dislocation defect area

I1、I2  穿透光                M1   第一金属层I 1 , I 2 transmit light M1 first metal layer

M2  第二金属层                M3   第三金属层M2 second metal layer M3 third metal layer

M3a、M3b、M3c、M3d  条状区段M3a, M3b, M3c, M3d Strip section

具体实施方式 Detailed ways

图3为依本发明的设计,显示一多域液晶显示器(multi-domain LCD)10的局部剖面示意简图。FIG. 3 is a partial cross-sectional schematic diagram showing a multi-domain LCD (multi-domain LCD) 10 according to the design of the present invention.

如图3所示,液晶显示器10包含一彼此相向的滤光片基板12及一有源元件阵列基板(active element substrate)14,且两基板间夹设一液晶层16。液晶层16采用负介电各向异性(negative dielectric anisotropy)液晶材料,使未施加电压时液晶分子呈垂直配向(vertical alignment)。另外,液晶层16中可添加助旋掺杂剂(chiral dopant),以加速液晶旋转并减小错向缺陷(disclination)。于有源元件阵列基板14的透明基板18上形成有如薄膜晶体管(TFT)之类的切换元件20、像素电极22及配向层24。滤光片基板12的透明基板26上形成有彩色滤光片28、遮光黑矩阵层30、共用电极32及配向层34。As shown in FIG. 3 , the liquid crystal display 10 includes a filter substrate 12 and an active element substrate 14 facing each other, and a liquid crystal layer 16 is interposed between the two substrates. The liquid crystal layer 16 adopts liquid crystal material with negative dielectric anisotropy, so that the liquid crystal molecules are vertically aligned when no voltage is applied. In addition, a chiral dopant can be added to the liquid crystal layer 16 to accelerate the liquid crystal rotation and reduce disclination. A switching element 20 such as a thin film transistor (TFT), a pixel electrode 22 and an alignment layer 24 are formed on the transparent substrate 18 of the active element array substrate 14 . A color filter 28 , a light-shielding black matrix layer 30 , a common electrode 32 and an alignment layer 34 are formed on the transparent substrate 26 of the filter substrate 12 .

于此,须注意本说明书中「A层结构形成于B层结构上」的用语,并不限定为A层结构直接贴覆接触B层结构表面的方式,例如A层结构与B层结构中间尚间隔其他叠层结构亦为该用语所涵盖范围。Here, it should be noted that the term "A-layer structure is formed on B-layer structure" in this specification is not limited to the way that A-layer structure directly touches the surface of B-layer structure, for example, there is still a layer between A-layer structure and B-layer structure Intervals and other laminated structures are also covered by this term.

图4为依本发明一实施例,显示有源元件阵列基板14上构成一像素结构40的不同膜层的平面示意图,图5A为沿图4的A-A’线横切而得的剖面图,图5B为沿图4的B-B’线横切而得的剖面图。FIG. 4 is a schematic plan view showing different film layers constituting a pixel structure 40 on the active element array substrate 14 according to an embodiment of the present invention. FIG. 5A is a cross-sectional view obtained along the line AA' of FIG. 4 , FIG. 5B is a cross-sectional view obtained along the BB' line of FIG. 4.

本实施例的切换元件例示为一n型非晶硅薄膜晶体管(n-type a-SiTFT)42,如图4所示,有源元件阵列基板14上形成多道相互平行的扫描线(scanline)44及相互平行的数据线(data line)46,且两相邻的扫描线44正交于两相邻的数据线46而圈围出一像素区域。如氧化铟锡(Indium Tin Oxide;ITO)或铟锌氧化物(Indium Zinc Oxide;IZ0)透明导电膜构成的像素电极48分布于该像素区域上,且薄膜晶体管42形成于扫描线44与数据线46交叉点处。The switching element of this embodiment is illustrated as an n-type amorphous silicon thin film transistor (n-type a-SiTFT) 42. As shown in FIG. 44 and data lines 46 parallel to each other, and two adjacent scan lines 44 are orthogonal to the two adjacent data lines 46 to enclose a pixel area. For example, the pixel electrode 48 made of indium tin oxide (Indium Tin Oxide; ITO) or indium zinc oxide (Indium Zinc Oxide; IZO) transparent conductive film is distributed on the pixel area, and the thin film transistor 42 is formed on the scanning line 44 and the data line 46 at the intersection.

图5A的剖面图显示薄膜晶体管42及其周围的膜层堆叠结构。在像素结构40中,一第一金属层(metal 1 layer)M1形成于透明基板18上,第一金属层M1可由沉积Cr、Ta或Al/Mo之类金属膜于透明基板18上形成,经光刻图案化工艺构成扫描线44及薄膜晶体管42的栅极42g。一具有介电效果的栅极绝缘层(gate insulator)52覆盖该第一金属层M1,栅极绝缘层52可利用如SiNx之类无机材料以化学气相沉积方式沉积于第一金属层M1上形成。一如非晶硅膜构成的薄膜晶体管通道层42c、n+非晶硅层42e及一第二金属层(metal 2 layer)M2形成于栅极绝缘层52上。第二金属层M2可由溅镀如Al/Cr、Al/Ti、Ti或Mo/Al/Mo之类金属膜于栅极绝缘层52上形成,经光刻图案化工艺构成薄膜晶体管42的源极42s、漏极42d及数据线46。源极42s与漏极42d配置于栅极42g上方的通道层42c两侧。The cross-sectional view of FIG. 5A shows the thin film transistor 42 and its surrounding film stack structure. In the pixel structure 40, a first metal layer (metal 1 layer) M1 is formed on the transparent substrate 18, and the first metal layer M1 can be formed by depositing a metal film such as Cr, Ta or Al/Mo on the transparent substrate 18, through The scan line 44 and the gate 42g of the thin film transistor 42 are formed by a photolithographic patterning process. A gate insulating layer (gate insulator) 52 with a dielectric effect covers the first metal layer M1, and the gate insulating layer 52 can be deposited on the first metal layer M1 by chemical vapor deposition using an inorganic material such as SiNx . form. A TFT channel layer 42c composed of an amorphous silicon film, an n+ amorphous silicon layer 42e and a second metal layer (metal 2 layer) M2 are formed on the gate insulating layer 52 . The second metal layer M2 can be formed on the gate insulating layer 52 by sputtering a metal film such as Al/Cr, Al/Ti, Ti or Mo/Al/Mo, and forms the source of the thin film transistor 42 through a photolithographic patterning process. 42s, drain 42d and data line 46. The source 42s and the drain 42d are disposed on both sides of the channel layer 42c above the gate 42g.

一具有介电效果的保护层(passivation insulator)54设置于栅极绝缘层52上,以覆盖薄膜晶体管42的源极42s、漏极42d及数据线46,保护层54例如可由SiNx之类无机材料或丙烯酸树脂(acrylic resin)、聚酰亚胺(polyimide)之类有机材料构成。如ITO或IZO透明导电膜构成的像素电极48形成于保护层54上。薄膜晶体管42的栅极42g、源极42s及漏极42d分别与扫描线44、数据线46.及像素电极48电连接。A passivation insulator 54 with a dielectric effect is disposed on the gate insulating layer 52 to cover the source 42s, the drain 42d and the data line 46 of the thin film transistor 42. The passivation insulator 54 can be made of SiN x or the like inorganic Materials or organic materials such as acrylic resin (acrylic resin) and polyimide (polyimide). A pixel electrode 48 made of a transparent conductive film such as ITO or IZO is formed on the protective layer 54 . The gate 42g, source 42s and drain 42d of the thin film transistor 42 are electrically connected to the scan line 44, the data line 46. and the pixel electrode 48, respectively.

在完成图5A所示的一般薄膜晶体管工艺后,如图5B所示,本发明设计在像素电极48上再形成一介电层56。介电层56例如可由SiNx之类无机材料或丙烯酸树脂(acrylic resin)、聚酰亚胺(polyimide)之类有机材料构成。接着,于介电层56上形成一第三金属层(metal 3 layer)M3,该第三金属层M3可通过布线方式电连接滤光片基板12的共用电极(common electrode)32(结合图3所示),使其与共用电极32的电位(Vcom)等电位。换言之,在介电层56上形成的第三金属层M3构成有源元件阵列基板14上的一共用电极。第三金属层M3的材料例如可为ITO、IZO透明导电膜,或Al/Nd、Al/Mo等的金属导电材料。After completing the general TFT process shown in FIG. 5A , as shown in FIG. 5B , the present invention designs to form a dielectric layer 56 on the pixel electrode 48 . The dielectric layer 56 can be made of inorganic materials such as SiN x or organic materials such as acrylic resin and polyimide, for example. Next, a third metal layer (metal 3 layer) M3 is formed on the dielectric layer 56, and the third metal layer M3 can be electrically connected to the common electrode (common electrode) 32 of the optical filter substrate 12 through wiring (combined with FIG. 3 shown) to make it equal to the potential (Vcom) of the common electrode 32. In other words, the third metal layer M3 formed on the dielectric layer 56 constitutes a common electrode on the active device array substrate 14 . The material of the third metal layer M3 can be, for example, ITO, IZO transparent conductive film, or metal conductive materials such as Al/Nd, Al/Mo and the like.

如下说明本发明第三金属层(共用电极)M3于介电层56上的分布方式及设计效果。The distribution and design effect of the third metal layer (common electrode) M3 on the dielectric layer 56 of the present invention will be described as follows.

请再参考图4,如图4的阴影线区域所示,于介电层56上分布的第三金属层(共用电极)M3包含实质平行扫描线44的多个条状区段(如M3a、M3b)及实质平行数据线46的多个条状区段(如M3c、M3d),且所有条状区段界定出多个方形围绕区域62(图4例示为三个而构成一「目」字型分布)。各个方形围绕区域62均叠合像素电极48,使各条状区段M3a、M3b、M3c、M3d均与邻近的像素电极48构成一边缘电场形成(induced,引致)区域。Please refer to FIG. 4 again, as shown in the hatched area of FIG. 4, the third metal layer (common electrode) M3 distributed on the dielectric layer 56 includes a plurality of strip-shaped segments substantially parallel to the scan line 44 (such as M3a, M3b) and a plurality of strip sections (such as M3c, M3d) substantially parallel to the data line 46, and all the strip sections define a plurality of square surrounding areas 62 (three are illustrated in FIG. 4 to form a word "目") type distribution). Each square surrounding area 62 overlaps the pixel electrode 48 , so that each strip section M3 a , M3 b , M3 c , M3 d forms a fringe electric field induced (induced) area with the adjacent pixel electrode 48 .

如下以图6A及图6B说明本发明利用第三金属层(共用电极)M3构成边缘电场形成区域,并改变液晶分子配向的设计原理。6A and 6B illustrate the design principle of using the third metal layer (common electrode) M3 to form a fringe electric field forming region and changing the alignment of liquid crystal molecules in the present invention.

如图6A所示,当尚未施加电压(Voff)时,具有负介电各向异性的液晶分子64呈垂直配向,即各个液晶分子64以几乎垂直透明基板18方式排列。接着,如图6B所示,当施加电压(Von)一段时间后,因第三金属层(共用电极)M3与Vcom等电位,故第三金属层(共用电极)M3与像素电极48间的压差可产生边缘电场效应(fringe field effect),其效果可造成如图6B所示的倾斜电场方向,使具有负介电各向异性的液晶分子64指向旋转为与倾斜电场方向垂直的方向。请再参考图4,依本发明第三金属层(共用电极)M3的分布设计,因一方形围绕区域62是由上下左右四个条状区段M3a、M3b、M3c、M3d所构成,故当边缘电场形成(induced,引致)后可产生四个不同的倾斜电场方向,使方形围绕区域62四周的液晶分子64同时往中心倾倒而产生四个不同的液晶分子倾斜方向,获得分割出四个具不同倾斜方向的液晶微域的效果。As shown in FIG. 6A , when no voltage (Voff) is applied, the liquid crystal molecules 64 with negative dielectric anisotropy are vertically aligned, that is, each liquid crystal molecule 64 is arranged almost vertically to the transparent substrate 18 . Next, as shown in FIG. 6B, when the voltage (Von) is applied for a period of time, the voltage between the third metal layer (common electrode) M3 and the pixel electrode 48 is equal to Vcom because the third metal layer (common electrode) M3 has the same potential as Vcom. The difference can produce a fringe field effect, which can cause an oblique electric field direction as shown in FIG. 6B, so that the direction of the liquid crystal molecules 64 with negative dielectric anisotropy is rotated to a direction perpendicular to the oblique electric field direction. Please refer to FIG. 4 again, according to the distribution design of the third metal layer (common electrode) M3 of the present invention, because a square surrounding area 62 is composed of four strip sections M3a, M3b, M3c, and M3d up, down, left, and right, so when After the fringe electric field is formed (induced, induced), four different oblique electric field directions can be generated, so that the liquid crystal molecules 64 around the square surrounding area 62 fall to the center at the same time to generate four different oblique directions of the liquid crystal molecules. Effect of liquid crystal microdomains with different tilt orientations.

图7为依上述实施例,显示液晶分子64实际倾倒方向的示意图。由图7可清楚看出左右两侧的液晶分子64受到第三金属层(共用电极)M3与像素电极48的压差所产生的边缘电场效应影响,而明显往中心倾倒的情形。FIG. 7 is a schematic diagram showing the actual tilting direction of the liquid crystal molecules 64 according to the above embodiment. It can be clearly seen from FIG. 7 that the liquid crystal molecules 64 on the left and right sides are obviously dumped towards the center due to the fringe electric field effect generated by the voltage difference between the third metal layer (common electrode) M3 and the pixel electrode 48 .

通过本实施例的设计,仅需搭配一般薄膜晶体管工艺再另形成一分布方式预先设计的第三金属层M3,即可获得多域配向的效果。与公知技术利用凸体(bump)或凹面结构的设计相比较,本发明在未施加电压(Voff)的状态下各个液晶分子64均呈垂直配向,故不会产生多余的光程差值(△nd=0),而可避免漏光现象产生。另一方面,与公知技术在电极处形成开缝的方式相比,本发明通过第三金属层(共用电极)M3与像素电极48的压差所产生的边缘电场效应,可提供较强的液晶分子倾倒力量,且可减少错向缺陷形成,可有效提升整体光穿透率。Through the design of this embodiment, it is only necessary to form a third metal layer M3 with a pre-designed distribution pattern in combination with a general thin film transistor process to obtain the effect of multi-domain alignment. Compared with the design of the known technology using a bump or concave structure, in the present invention, each liquid crystal molecule 64 is vertically aligned when no voltage (Voff) is applied, so no redundant optical path difference (△ nd=0), and the light leakage phenomenon can be avoided. On the other hand, compared with the conventional method of forming slits at the electrodes, the present invention can provide stronger liquid crystal through the fringe electric field effect generated by the voltage difference between the third metal layer (common electrode) M3 and the pixel electrode 48. Molecular dumping force, and can reduce the formation of misalignment defects, can effectively improve the overall light transmittance.

虽然图4例示为第三金属层(共用电极)M3将一像素区域切割为三个方形围绕区域62的目字型分布,但其并不限定,不同切割方式同样可获得本发明的效果。举例而言,如图8所示,该第三金属层(共用电极)M3亦可将一像素区域仅切割为二方形围绕区域62而构成一日字型分布。或者,第三金属层(共用电极)M3亦可如图9或图10所示,将一像素区域切割为构成二纵列的四块或六块围绕区域62。当切割出的围绕区域62数量越多则液晶反应速度越快,故可视实际需求来调整第三金属层(共用电极)M3的分布方式。Although FIG. 4 shows that the third metal layer (common electrode) M3 cuts a pixel region into three squares surrounding the region 62 in a grid-shaped distribution, it is not limited, and different cutting methods can also obtain the effect of the present invention. For example, as shown in FIG. 8 , the third metal layer (common electrode) M3 can also divide a pixel region into two square surrounding regions 62 to form a zigzag distribution. Alternatively, as shown in FIG. 9 or FIG. 10 , the third metal layer (common electrode) M3 can also divide a pixel area into four or six surrounding areas 62 forming two columns. The larger the number of surrounding regions 62 cut out, the faster the liquid crystal reaction speed, so the distribution of the third metal layer (common electrode) M3 can be adjusted according to actual needs.

再者,第三金属层(共用电极)M3与像素电极48两者的相对位置并不限定,例如可如图4所示,由俯视方向观察的第三金属层(共用电极)M3周缘可露出于与像素电极重合区域之外;亦可如图11所示,像素电极48周缘露出于与第三金属层(共用电极)M3重合区域之外。亦即,两者相对分布位置并不限定,仅需获得足够边缘电场强度即可。Furthermore, the relative positions of the third metal layer (common electrode) M3 and the pixel electrode 48 are not limited, for example, as shown in FIG. Outside the area overlapping with the pixel electrode; as shown in FIG. 11 , the periphery of the pixel electrode 48 is exposed outside the area overlapping with the third metal layer (common electrode) M3. That is, the relative distribution positions of the two are not limited, and it is only necessary to obtain sufficient fringe electric field strength.

另外,依本发明的设计,第三金属层(共用电极)M3间隔介电层56与像素电极48叠合的区域可构成一储存电容器Cst,提供液晶显示器额外的储存电容值。In addition, according to the design of the present invention, the area where the third metal layer (common electrode) M3 separates the dielectric layer 56 and the pixel electrode 48 overlaps can form a storage capacitor Cst, providing additional storage capacitance of the liquid crystal display.

图12为依本发明的另一实施例,显示一半透式像素结构60的平面示意图。图13为沿图12的C-C’线横切而得的剖面图。请同时参考图12及图13,本发明除利用第三金属层M3提供与像素电极48协同产生边缘电场的作用外,因如前述第三金属层M3亦可由反射金属材料构成,故可在介电层56上形成作为共用电极的第三金属层M3时,以与各个条状区段维持一间隙条件下将第三金属层M3布满一围绕区域62而形成反射层58,由此构成半透式像素结构60的反射区。当然,反射层58于像素区域上的分布范围并不限定,而可视应用场合的环境光量调整反射区与穿透区的比例。举例而言,若穿透区面积需设计为大于反射区面积时,可如图14所示,第三金属层(共用电极)M3将一像素区域切割为三块方形围绕区域62,而反射层58仅分布于三块围绕区域62其中之一;反之,若穿透区面积需小于反射区面积时,仅需将反射层58分布于三块围绕区域62其中二块即可达成。因此,通过本发明的设计,可于同一道工艺利用第三金属层M3同时形成共用电极及反射层,获得简化半透式像素结构的制作方法的效果。FIG. 12 is a schematic plan view showing a transflective pixel structure 60 according to another embodiment of the present invention. Fig. 13 is a cross-sectional view taken along line C-C' of Fig. 12 . Please refer to FIG. 12 and FIG. 13 at the same time. In addition to using the third metal layer M3 to cooperate with the pixel electrode 48 to generate a fringe electric field in the present invention, the third metal layer M3 can also be made of a reflective metal material as mentioned above, so it can be used in the medium. When forming the third metal layer M3 as a common electrode on the electrical layer 56, the third metal layer M3 is covered with a surrounding area 62 under the condition of maintaining a gap with each strip section to form a reflective layer 58, thereby forming a half The reflective area of the transmissive pixel structure 60 . Of course, the distribution range of the reflective layer 58 on the pixel area is not limited, and the ratio of the reflective area to the transmissive area can be adjusted according to the amount of ambient light in the application. For example, if the area of the penetrating area needs to be designed to be larger than the area of the reflecting area, as shown in FIG. 58 is only distributed in one of the three surrounding areas 62 ; on the contrary, if the area of the penetrating area needs to be smaller than that of the reflecting area, it is only necessary to distribute the reflecting layer 58 in two of the three surrounding areas 62 . Therefore, through the design of the present invention, the third metal layer M3 can be used to form the common electrode and the reflective layer at the same time in the same process, and the effect of simplifying the manufacturing method of the transflective pixel structure is obtained.

图15为一剖面示意图,显示本发明的另一实施例。依本实例的设计,可在形成保护层54之后再沉积一平坦化层66,之后再将像素电极48形成于平坦化层66上,如此可获得垫高像素电极48形成位置以提高开口率的效果。Fig. 15 is a schematic cross-sectional view showing another embodiment of the present invention. According to the design of this example, a planarization layer 66 can be deposited after the protective layer 54 is formed, and then the pixel electrode 48 can be formed on the planarization layer 66, so that the formation position of the pixel electrode 48 can be raised to increase the aperture ratio. Effect.

图16为一剖面示意图,显示本发明的另一实施例。如图16所示,依本实施例的设计,在栅极绝缘层52上沉积第二金属层M2后,可将该第二金属层M2同时图案化形成数据线46与共用电极68,该共用电极68的分布同于前述第三金属层(共用电极)M3围绕像素电极48的方式,以产生相同的边缘电场效应。因由第二金属层M2构成的共用电极68与数据线46同层,其与像素电极48的距离较短而可增加边缘电场强度,以增大倾倒液晶分子的力量。共用电极68与像素电极48叠合的区域同样可构成一储存电容器Cst,提供液晶显示器额外的储存电容值。Fig. 16 is a schematic cross-sectional view showing another embodiment of the present invention. As shown in FIG. 16, according to the design of this embodiment, after depositing the second metal layer M2 on the gate insulating layer 52, the second metal layer M2 can be simultaneously patterned to form the data line 46 and the common electrode 68. The distribution of the electrodes 68 is the same as that of the aforementioned third metal layer (common electrode) M3 surrounding the pixel electrodes 48, so as to generate the same fringe electric field effect. Because the common electrode 68 formed by the second metal layer M2 is in the same layer as the data line 46, the distance between it and the pixel electrode 48 is relatively short, which can increase the strength of the fringe electric field to increase the force of dumping the liquid crystal molecules. The overlapping area of the common electrode 68 and the pixel electrode 48 can also form a storage capacitor Cst, which provides an additional storage capacitance of the liquid crystal display.

再者,图17为一示意图,显示本发明利用第二金属层M2构成一半透式像素结构反射区的设计,图18为沿图17的D-D’线横切而得的剖面图。Furthermore, FIG. 17 is a schematic diagram showing the design of the present invention using the second metal layer M2 to form a semi-transparent pixel structure reflection area, and FIG. 18 is a cross-sectional view obtained along the line D-D' in FIG. 17 .

请同时参考图17及图18,于本实施例利用第二金属层M2图案化形成共用电极68的设计下,亦可同时利用第二金属层M2以与各个条状区段维持一间隙条件下,将第二金属层M2布满一围绕区域而形成反射层58,获得利用第二金属层M2构成一半透式像素结构的反射区的效果。Please refer to FIG. 17 and FIG. 18 at the same time. Under the design of the second metal layer M2 to form the common electrode 68 by patterning in this embodiment, the second metal layer M2 can also be used to maintain a gap with each strip section. The reflective layer 58 is formed by covering a surrounding area with the second metal layer M2, so as to obtain the effect of using the second metal layer M2 to form the reflective area of the transflective pixel structure.

图19为一剖面示意图,显示本发明的另一实施例。如图19所示,本实施例为基于不改变一般五道薄膜晶体管工艺前提下的设计,亦即于透明基板18上沉积第一金属层M1后,将该第一金属层M1同时图案化形成扫描线44(未图示)与共用电极72。该共用电极72的分布与前述第三金属层(共用电极)M3围绕像素电极48的方式相同,以产生相同的边缘电场效应。共用电极72与像素电极48叠合的区域同样可构成一储存电容器Cst,提供液晶显示器额外的储存电容值。再者,图20为依本实施例的设计,显示于两相邻像素区域间的内连线分布方式示意图。如图20所示,可分别暴露一像素区域中共用电极72上方的部分栅极绝缘层52及相邻像素区域中共用电极72’上方的部分栅极绝缘层52,再分别形成接触孔70及70’,并以第二金属层M2搭接。Fig. 19 is a schematic cross-sectional view showing another embodiment of the present invention. As shown in FIG. 19, this embodiment is based on the design without changing the general five-pass thin film transistor process, that is, after depositing the first metal layer M1 on the transparent substrate 18, the first metal layer M1 is patterned at the same time. The scan line 44 (not shown) and the common electrode 72 . The distribution of the common electrode 72 is the same as that of the aforementioned third metal layer (common electrode) M3 surrounding the pixel electrode 48 to generate the same fringe electric field effect. The overlapping area of the common electrode 72 and the pixel electrode 48 can also form a storage capacitor Cst, which provides an additional storage capacitance value of the liquid crystal display. Furthermore, FIG. 20 is a schematic diagram showing the distribution of interconnection lines between two adjacent pixel regions according to the design of this embodiment. As shown in FIG. 20, part of the gate insulating layer 52 above the common electrode 72 in a pixel region and part of the gate insulating layer 52 above the common electrode 72' in the adjacent pixel region can be respectively exposed, and then contact holes 70 and 72 are respectively formed. 70', and overlapped by the second metal layer M2.

图21为一示意图,显示本发明利用第一金属层M1构成一半透式像素结构反射区的设计,图22为沿图21的E-E’线横切而得的剖面图。Fig. 21 is a schematic diagram showing the design of the present invention using the first metal layer M1 to form a semi-transparent pixel structure reflection area, and Fig. 22 is a cross-sectional view taken along line E-E' of Fig. 21 .

请同时参考图21及图22,于本实施例利用第一金属层M1图案化形成共用电极72的设计下,亦可同时利用第一金属层M1以与各个条状区段维持一间隙条件下,将第一金属层M1布满一围绕区域而形成反射层58,获得利用第一金属层M1构成一半透式像素结构的反射区的效果。Please refer to FIG. 21 and FIG. 22 at the same time. Under the design of the present embodiment using the patterning of the first metal layer M1 to form the common electrode 72, the first metal layer M1 can also be used to maintain a gap with each strip section. The reflective layer 58 is formed by covering a surrounding area with the first metal layer M1 , so as to obtain the effect of using the first metal layer M1 to form a reflective area of the transflective pixel structure.

图23为显示本发明另一实施例的像素结构平面示意图。如图23所示,本发明利用第一金属层(共用电极)M1形成多个围绕区域62的边缘电场设计,亦可同时搭配在像素电极48上形成开缝74的方式,如此可提供加强特定区域液晶分子倾倒力量的效果,以进一步减小错向缺陷产生机率。再者,如图24所示,同时搭配于像素电极48上形成开缝74的方式,同样可运用于由第二金属层(共用电极)M2构成多个围绕区域62的边缘电场设计。FIG. 23 is a schematic plan view showing a pixel structure according to another embodiment of the present invention. As shown in FIG. 23, the present invention uses the first metal layer (common electrode) M1 to form a plurality of fringe electric field designs surrounding the region 62, and can also be matched with the method of forming a slit 74 on the pixel electrode 48, which can provide enhanced specificity. The effect of the pouring force of the regional liquid crystal molecules can further reduce the probability of dislocation defects. Moreover, as shown in FIG. 24 , the method of simultaneously forming the slit 74 on the pixel electrode 48 can also be applied to the fringe electric field design in which multiple surrounding regions 62 are formed by the second metal layer (common electrode) M2.

于上述条状共用电极区段搭配开缝的设计,开缝74的形成方式并不限定,仅需实质平行条状共用电极区段的走向即可,例如图24显示的对应条状共用电极区段位置形成的横向开缝74a、或未对应共用电极区段位置形成的纵向开缝74b设计均可。再者,在条状共用电极区段搭配开缝的设计方式下,第一或第二金属层(共用电极)于一像素区域上的分布方式并不限定,例如可将一像素区域切割出二个围绕区域62而构成一日字型分布(图23、图24所示)、切割出三个围绕区域62而构成一目字型分布(图25所示)或切割出构成二纵列的六块围绕区域62(图26所示)均可。In the design of the above-mentioned strip-shaped common electrode section with slits, the formation method of the slit 74 is not limited, it only needs to be substantially parallel to the direction of the strip-shaped common electrode section, for example, the corresponding strip-shaped common electrode area shown in FIG. 24 The transverse slit 74a formed at the section position, or the longitudinal slit 74b formed at the section position not corresponding to the common electrode can be designed. Furthermore, in the design of strip-shaped common electrode sections with slits, the distribution of the first or second metal layer (common electrode) on a pixel area is not limited, for example, a pixel area can be cut into two One surrounds the area 62 to form a Japanese-style distribution (shown in Figure 23 and Figure 24), cuts out three surrounding areas 62 and forms a single-word distribution (shown in Figure 25) or cuts out six blocks that form two columns The surrounding area 62 (shown in FIG. 26 ) is acceptable.

另外,依本发明的设计,在液晶单元外部亦可贴合一圆偏光系统,以增加光穿透率。如图27所示,例如可在上基板26与偏光板76a间及下基板18与偏光板76b间分别设置1/4波长板(quarter wave plate)78a及78b,且两1/4波长板均与偏光板的偏振轴夹45度角,即可将一线偏光系统转换为一圆偏光系统。In addition, according to the design of the present invention, a circular polarizing system can also be attached to the outside of the liquid crystal unit to increase the light transmittance. As shown in Figure 27, for example, 1/4 wavelength plates (quarter wave plate) 78a and 78b can be respectively set between the upper substrate 26 and the polarizer 76a and between the lower substrate 18 and the polarizer 76b, and the two 1/4 wavelength plates are With a 45-degree angle to the polarization axis of the polarizer, the linear polarizing system can be converted into a circular polarizing system.

虽然本发明已以具体实施例揭示,但其并非用以限定本发明,任何本领域的技术人员,在不脱离本发明的构思和范围的前提下所作出的等同组件的置换,或依本发明专利保护范围所作的等同变化与修饰,皆应仍属本专利涵盖的范畴。Although the present invention has been disclosed with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art can make replacements of equivalent components without departing from the concept and scope of the present invention, or replace them according to the present invention. The equivalent changes and modifications made in the scope of patent protection should still fall within the scope of this patent.

Claims (21)

1.一种多域液晶显示器,其特征在于,包含:1. A multi-domain liquid crystal display, characterized in that, comprising: 彼此相向的一第一透明基板及一第二透明基板;a first transparent substrate and a second transparent substrate facing each other; 一液晶层,介设于该第一透明基板及该第二透明基板间,该液晶层是由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer interposed between the first transparent substrate and the second transparent substrate, the liquid crystal layer is composed of liquid crystal molecular materials with negative dielectric anisotropy; 一第一共用电极,设置于该第一透明基板上;a first common electrode disposed on the first transparent substrate; 多道彼此正交的扫描线及数据线,形成于该第二透明基板上,两相邻的扫描线及两相邻的数据线界定出一像素区域;A plurality of scan lines and data lines orthogonal to each other are formed on the second transparent substrate, and two adjacent scan lines and two adjacent data lines define a pixel area; 对应该像素区域设置的一切换元件;a switch element set corresponding to the pixel area; 一第一介电层,形成于该第二透明基板上并覆盖该扫描线;a first dielectric layer formed on the second transparent substrate and covering the scanning line; 一第二介电层,形成于该第一介电层上并覆盖该数据线;a second dielectric layer formed on the first dielectric layer and covering the data line; 一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer; 一第三介电层,形成于该第二透明基板上并覆盖该像素电极;及a third dielectric layer formed on the second transparent substrate and covering the pixel electrode; and 一第二共用电极,形成于该第二透明基板第三介电层上,该第二共用电极包含多个条状区段,所述条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区,以产生多个具有不同液晶分子倾斜方向的液晶微域。A second common electrode is formed on the third dielectric layer of the second transparent substrate, the second common electrode includes a plurality of strip-shaped sections, and the strip-shaped sections define a plurality of overlapping with the pixel electrode The surrounding area, and each strip section and the pixel electrode form a fringe electric field forming area, so as to generate a plurality of liquid crystal micro-domains with different tilting directions of liquid crystal molecules. 2.如权利要求1所述的多域液晶显示器,其特征在于,该切换元件为一薄膜晶体管,该第一介电层为一栅极绝缘层,且该第二介电层为一保护层。2. The multi-domain liquid crystal display according to claim 1, wherein the switching element is a thin film transistor, the first dielectric layer is a gate insulating layer, and the second dielectric layer is a protective layer . 3.如权利要求1所述的多域液晶显示器,其特征在于,第二共用电极是呈包含三个围绕区域的一目字型分布,或呈包含二个围绕区域的一日字型分布。3 . The multi-domain liquid crystal display as claimed in claim 1 , wherein the second common electrode is arranged in a zigzag shape including three surrounding areas, or in a zigzag shape including two surrounding areas. 4 . 4.如权利要求1所述的多域液晶显示器,其特征在于,更包含:4. The multi-domain liquid crystal display according to claim 1, further comprising: 一第一偏光板,设置于该第一透明基板相对该液晶层的外侧;a first polarizing plate arranged on the outer side of the first transparent substrate opposite to the liquid crystal layer; 一第二偏光板,设置于该第二透明基板相对该液晶层的外侧;a second polarizing plate arranged on the outside of the second transparent substrate opposite to the liquid crystal layer; 一第一1/4波长板,设置于该第一偏光板与该第一透明基板间;及a first 1/4 wavelength plate disposed between the first polarizer and the first transparent substrate; and 一第二1/4波长板,设置于该第二偏光板与该第二透明基板间。A second 1/4 wavelength plate is arranged between the second polarizing plate and the second transparent substrate. 5.如权利要求1所述的多域液晶显示器,其特征在于,至少部分该条状区段与该像素电极叠合,且构成一储存电容器。5 . The multi-domain liquid crystal display as claimed in claim 1 , wherein at least a part of the strip segment overlaps with the pixel electrode and forms a storage capacitor. 6 . 6.如权利要求1所述的多域液晶显示器,其特征在于,该液晶层包含助旋掺杂剂材料。6. The multi-domain liquid crystal display as claimed in claim 1, wherein the liquid crystal layer comprises a spin-promoting dopant material. 7.如权利要求1所述的多域液晶显示器,其特征在于,该像素电极由透明导电膜构成。7. The multi-domain liquid crystal display as claimed in claim 1, wherein the pixel electrode is made of a transparent conductive film. 8.如权利要求1所述的多域液晶显示器,其特征在于,该第二共用电极是由透明导电材料或金属导电材料所构成。8. The multi-domain liquid crystal display as claimed in claim 1, wherein the second common electrode is made of a transparent conductive material or a metal conductive material. 9.如权利要求1所述的多域液晶显示器,其特征在于,更包含一平坦化层介设于该第二介电层与该像素电极之间。9. The multi-domain liquid crystal display as claimed in claim 1, further comprising a planarization layer interposed between the second dielectric layer and the pixel electrode. 10.如权利要求1所述的多域液晶显示器,其特征在于,更包含一反射层形成于该第三介电层上并叠合部分该像素电极。10 . The multi-domain liquid crystal display as claimed in claim 1 , further comprising a reflective layer formed on the third dielectric layer and partially overlapped with the pixel electrode. 11 . 11.如权利要求10所述的多域液晶显示器,其特征在于,该第二共用电极与该反射层形成于同层并围绕该反射层形成。11. The multi-domain liquid crystal display as claimed in claim 10, wherein the second common electrode is formed on the same layer as the reflective layer and surrounds the reflective layer. 12.一种多域液晶显示器,其特征在于,包含:12. A multi-domain liquid crystal display, characterized in that it comprises: 一滤光片基板,其上形成一共用电极;A filter substrate on which a common electrode is formed; 一有源元件阵列基板,包含:An active element array substrate, including: 一透明基板;a transparent substrate; 一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element; 一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer; 一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线及该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line and the drain and source regions of the switching element; 一第二介电层,覆盖该第二金属层;a second dielectric layer covering the second metal layer; 一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer; 一第三介电层,覆盖该像素电极;及a third dielectric layer covering the pixel electrode; and 一第三金属层,形成于该第三介电层上且电连接该共用电极;及a third metal layer formed on the third dielectric layer and electrically connected to the common electrode; and 一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy; 其中该第三金属层围绕该像素电极且协同该像素电极形成一边缘电场,以产生多个具有不同液晶分子倾斜方向的液晶微域。Wherein the third metal layer surrounds the pixel electrode and cooperates with the pixel electrode to form a fringe electric field to generate a plurality of liquid crystal micro-domains with different tilt directions of liquid crystal molecules. 13.如权利要求12所述的多域液晶显示器,其特征在于,该第三金属层包含实质平行该扫描线的多个第一条状区段及实质平行该数据线的多个第二条状区段,所述条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区。13. The multi-domain liquid crystal display according to claim 12, wherein the third metal layer comprises a plurality of first strip segments substantially parallel to the scan line and a plurality of second strip segments substantially parallel to the data line The strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode. 14.如权利要求12所述的多域液晶显示器,其特征在于,更包含一平坦化层介设于该第二介电层与该像素电极之间。14. The multi-domain liquid crystal display as claimed in claim 12, further comprising a planarization layer interposed between the second dielectric layer and the pixel electrode. 15.如权利要求12所述的多域液晶显示器,其特征在于,至少部分该第三金属层与该像素电极叠合且构成一储存电容器。15. The multi-domain liquid crystal display as claimed in claim 12, wherein at least part of the third metal layer overlaps with the pixel electrode and forms a storage capacitor. 16.一种多域液晶显示器,其特征在于,包含:16. A multi-domain liquid crystal display, characterized in that, comprising: 一滤光片基板,其上形成一共用电极;A filter substrate on which a common electrode is formed; 一有源元件阵列基板,包含:An active element array substrate, including: 一透明基板;a transparent substrate; 一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element; 一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer; 一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line, the drain and source regions of the switching element; 一第二介电层,覆盖该第二金属层;a second dielectric layer covering the second metal layer; 一像素电极,形成于该第二介电层上;a pixel electrode formed on the second dielectric layer; 一第三介电层,覆盖该像素电极;及a third dielectric layer covering the pixel electrode; and 一第三金属层,形成于该第三介电层上,该第三金属层具有彼此分离的第一部分及第二部分;及a third metal layer formed on the third dielectric layer, the third metal layer having first and second portions separated from each other; and 一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy; 其中该第三金属层的该第一部分电连接至该共用电极,且包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该第三金属层的该第二部分形成于该围绕区域内,并构成叠合部分该像素电极的一反射层。Wherein the first part of the third metal layer is electrically connected to the common electrode, and includes a plurality of strip sections, each strip section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip section The segments and the pixel electrode constitute a fringe electric field forming region; the second part of the third metal layer is formed in the surrounding region and constitutes a reflective layer overlapping the pixel electrode. 17.如权利要求16所述的多域液晶显示器,其特征在于,该第三金属层的该第一部分是呈包含三个围绕区域的一目字型分布,且该第三金属层的该第二部分分布于至少一围绕区域内。17. The multi-domain liquid crystal display as claimed in claim 16, wherein the first part of the third metal layer is distributed in a zigzag shape including three surrounding areas, and the second part of the third metal layer Some are distributed in at least one surrounding area. 18.一种多域液晶显示器,其特征在于,包含:18. A multi-domain liquid crystal display, characterized in that it comprises: 一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed; 一有源元件阵列基板,包含:An active element array substrate, including: 一透明基板;a transparent substrate; 一第一金属层,形成于该透明基板上,该第一金属层界定出一扫描线及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a scanning line and a gate area of a switching element; 一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer; 一第二金属层,形成于该第一介电层上,该第二金属层界定出一第二共用电极、一反射层、一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a second common electrode, a reflective layer, a data line, the drain and source regions of the switching element; 一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and 一像素电极,形成于该第二介电层上;及a pixel electrode formed on the second dielectric layer; and 一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy; 其中该第二共用电极包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该反射层形成于该围绕区域内并叠合部分该像素电极。Wherein the second common electrode comprises a plurality of strip-shaped sections, each strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode ; The reflective layer is formed in the surrounding area and partially overlaps the pixel electrode. 19.如权利要求18所述的多域液晶显示器,其特征在于,该第二共用电极是呈包含三个围绕区域的一目字型分布,且该反射层分布于至少一围绕区域内。19. The multi-domain liquid crystal display as claimed in claim 18, wherein the second common electrode is distributed in a grid pattern including three surrounding areas, and the reflective layer is distributed in at least one surrounding area. 20.一种多域液晶显示器,其特征在于,包含:20. A multi-domain liquid crystal display, characterized in that it comprises: 一滤光片基板,其上形成一第一共用电极;a filter substrate on which a first common electrode is formed; 一有源元件阵列基板,包含:An active element array substrate, including: 一透明基板;a transparent substrate; 一第一金属层,形成于该透明基板上,该第一金属层界定出一第二共用电极、一扫描线、一反射层及一切换元件的栅极区域;a first metal layer formed on the transparent substrate, the first metal layer defines a second common electrode, a scanning line, a reflective layer and a gate region of a switching element; 一第一介电层,覆盖该第一金属层;a first dielectric layer covering the first metal layer; 一第二金属层,形成于该第一介电层上,该第二金属层界定出一数据线、该切换元件的漏极及源极区域;a second metal layer formed on the first dielectric layer, the second metal layer defines a data line, the drain and source regions of the switching element; 一第二介电层,覆盖该第二金属层;及a second dielectric layer covering the second metal layer; and 一像素电极,形成于该第二介电层;及a pixel electrode formed on the second dielectric layer; and 一液晶层,介设于该滤光片基板与该有源元件阵列基板间,其由具有负介电各向异性的液晶分子材料所构成;A liquid crystal layer, interposed between the optical filter substrate and the active element array substrate, is composed of liquid crystal molecular materials with negative dielectric anisotropy; 其中该第二共用电极包含多个条状区段,各条状区段界定出与该像素电极叠合的多个围绕区域,且各条状区段均与该像素电极构成一边缘电场形成区;该反射层形成于该围绕区域内,并叠合部分该像素电极。Wherein the second common electrode comprises a plurality of strip-shaped sections, each strip-shaped section defines a plurality of surrounding areas overlapped with the pixel electrode, and each strip-shaped section forms a fringe electric field forming area with the pixel electrode ; The reflective layer is formed in the surrounding area and partially overlaps the pixel electrode. 21.如权利要求20所述的多域液晶显示器,其特征在于,该第二共用电极是呈包含三个围绕区域的一目字型分布,且该反射层分布于至少一围绕区域内。21. The multi-domain liquid crystal display as claimed in claim 20, wherein the second common electrode is distributed in a grid pattern including three surrounding areas, and the reflective layer is distributed in at least one surrounding area.
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