TWI381217B

TWI381217B - Liquid crystal display panel

Info

Publication number: TWI381217B
Application number: TW97124113A
Authority: TW
Inventors: Huang Shen Lin; Kuan Hsiung Wang; Chih Sheng Chang; Chueh Ju Chen; Chiu Lien Yang
Original assignee: Chimei Innolux Corp
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2013-01-01
Also published as: TW201001006A

Description

液晶顯示面板LCD panel

本發明係關於一種液晶顯示面板。The present invention relates to a liquid crystal display panel.

液晶顯示面板中之液晶本身不具發光特性，其係採用電場控制液晶分子扭轉而實現光之通過或不通過，從而達到顯示之目的。通常，液晶顯示面板之液晶驅動方式為扭轉向列模式，然而其視角範圍比較窄，即在大角度觀看時會有色彩失真及灰階反轉現象，顯示品質較差。為增大扭轉向列模式液晶顯示面板之視角，業界提出多種廣視角技術，其中，使用廣視角補償膜(Wide View Film,WVF)係目前被廣泛應用之一種廣視角技術。The liquid crystal in the liquid crystal display panel itself has no illuminating property, and the electric field is used to control the twist of the liquid crystal molecules to realize the passage or non-passing of the light, thereby achieving the purpose of display. Generally, the liquid crystal driving mode of the liquid crystal display panel is a twisted nematic mode, but the viewing angle range thereof is relatively narrow, that is, color distortion and gray scale inversion phenomenon are observed when viewed at a large angle, and display quality is poor. In order to increase the viewing angle of the twisted nematic mode liquid crystal display panel, various wide viewing angle technologies have been proposed in the industry, and a Wide View Film (WVF) system is widely used as a wide viewing angle technology.

請參閱圖1，係一種先前技術液晶顯示面板之立體分解示意圖。該液晶顯示面板100包括一第一基板110、一與該第一基板110相對設置之第二基板120及一夾於該第一基板110及第二基板120之間之液晶層130。該第一基板110包括沿遠離該液晶層130方向依序設置之一第一配向膜111、一第一補償膜113及一第一偏光片115。該第二基板120包括沿遠離該液晶層130方向依序設置之一第二配向膜121、一第二補償膜123及一第二偏光片125。該第一配向膜111包括一第一配向軸A1，該第二配向膜121包括一第二配向軸A2。該第一補償膜113包括一第一補償軸W1，該第二補償膜123包括一第二補償軸W2。該第一偏光片115包括一第一偏光軸P1，該第二偏光片125包括一第二偏光軸P2。Please refer to FIG. 1 , which is a perspective exploded view of a prior art liquid crystal display panel. The liquid crystal display panel 100 includes a first substrate 110 , a second substrate 120 disposed opposite the first substrate 110 , and a liquid crystal layer 130 sandwiched between the first substrate 110 and the second substrate 120 . The first substrate 110 includes a first alignment film 111, a first compensation film 113 and a first polarizer 115 disposed in a direction away from the liquid crystal layer 130. The second substrate 120 includes a second alignment film 121, a second compensation film 123 and a second polarizer 125 disposed in a direction away from the liquid crystal layer 130. The first alignment film 111 includes a first alignment axis A1, and the second alignment film 121 includes a second alignment axis A2. The first compensation film 113 includes a first compensation axis W1, and the second compensation film 123 includes a second compensation axis W2. The first polarizer 115 includes a first polarization axis P1, and the second polarizer 125 includes a first The second polarization axis P2.

請一併參閱圖2，圖2係圖1所示液晶顯示面板100之各元件之軸向示意圖。該第一配向軸A1及第二配向軸A2垂直，該液晶層130之液晶分子在該第一配向膜111及第二配向膜121之作用下呈旋轉角θ 3為90∘之扭轉向列式排列。定義一平行於該液晶顯示面板之水平軸X及一垂直於該液晶顯示面板100之垂直軸Y。該第一配向軸A1及第二配向軸A2與該水平軸之夾角θ 1及θ 2均為45。。該第一補償軸W1與第一配向軸A1重合，該第二補償軸W2與第二配向軸A2重合。該第一偏光軸P1與第一配向軸A1重合，該第二偏光軸P2與第二配向軸A2重合。Please refer to FIG. 2 together. FIG. 2 is an axial schematic view of the components of the liquid crystal display panel 100 shown in FIG. The first alignment axis A1 and the second alignment axis A2 are perpendicular, and the liquid crystal molecules of the liquid crystal layer 130 are rotated by the first alignment film 111 and the second alignment film 121 to have a rotation angle θ 3 of 90 ∘. arrangement. A horizontal axis X parallel to the liquid crystal display panel and a vertical axis Y perpendicular to the liquid crystal display panel 100 are defined. The angles θ 1 and θ 2 between the first alignment axis A1 and the second alignment axis A2 and the horizontal axis are both 45. . The first compensation axis W1 coincides with the first alignment axis A1, and the second compensation axis W2 coincides with the second alignment axis A2. The first polarization axis P1 coincides with the first alignment axis A1, and the second polarization axis P2 coincides with the second alignment axis A2.

其中，該第一補償膜113及第二補償膜123均為碟狀液晶分子膜(Discotic Liquid Crystal Film)，用於增大該液晶顯示面板100之視角及提高對比度。請一併參閱圖3，係碟狀液晶分子膜之結構示意圖。該碟狀液晶分子膜包括複數沿該垂直軸Y依序排列之碟狀液晶分子。在沿該垂直軸Y之方向，該複數碟狀液晶分子與該水平軸X之夾角分別為β₁ 、β₂ 、β₃ ……，且該夾角β₁ 、β₂ 、β₃ ……符合如下規律β₁ <β₂ <β₃ <……。由於該複數碟狀液晶分子可分別對該液晶層130中不同取向之液晶分子進行光學補償，從而該碟狀液晶分子膜可增大該液晶顯示面板100之視角及提高對比度。The first compensation film 113 and the second compensation film 123 are all discotic liquid crystal films for increasing the viewing angle of the liquid crystal display panel 100 and improving contrast. Please refer to FIG. 3 together for a schematic diagram of the structure of the discotic liquid crystal molecular film. The discotic liquid crystal molecular film includes a plurality of discotic liquid crystal molecules sequentially arranged along the vertical axis Y. In the direction along the vertical axis Y, the angle between the plurality of discotic liquid crystal molecules and the horizontal axis X is β ₁ , β ₂ , β ₃ , respectively, and the angles β ₁ , β ₂ , β ₃ ... are as follows Regular β ₁ <β ₂ <β ₃ <... Since the plurality of discotic liquid crystal molecules can optically compensate the liquid crystal molecules of different orientations in the liquid crystal layer 130, the discotic liquid crystal molecular film can increase the viewing angle of the liquid crystal display panel 100 and improve the contrast.

通常，衡量該二補償膜113、123之補償特性之主要參數係該二補償膜113、123中所有碟狀液晶分子與該水平軸 X之夾角β₁ 、β₂ 、β₃ ……之平均角β_i 。當β_i 為一標準值β₀ 時，該二補償膜113、123可以對該液晶層130之液晶分子進行最好的光學補償。例如，對於旋轉角θ₃ 為90∘之液晶層130，一般認為當該二補償膜之平均角β_i 為17∘時，該液晶層130將得到最好的光學補償。Generally, the main parameter for measuring the compensation characteristics of the two compensation films 113 and 123 is the average angle between the angles β ₁ , β ₂ , β _{3 ,} ... of all the discotic liquid crystal molecules in the two compensation films 113 and 123 and the horizontal axis X. β _i . When β _i is a standard value β ₀ , the two compensation films 113 and 123 can perform the best optical compensation on the liquid crystal molecules of the liquid crystal layer 130 . For example, for the liquid crystal layer 130 having a rotation angle θ ₃ of 90 Å, it is generally considered that the liquid crystal layer 130 will obtain the best optical compensation when the average angle β _i of the two compensation films is 17 Å.

然，因製程條件限制，常出現該二補償膜113、123之平均角β_i 不等於該標準值β₀ ，而與該標準值β₀ 存在一偏差，因此，當使用者忽略該偏差而將該液晶顯示面板100之各元件按照上述軸向配置時，θ₁ ＋θ₂ ＋θ₃ ＝180∘，該第一補償膜113及第二補償膜123不能對該液晶層130之液晶分子進行最好的光學補償，導致該第一補償膜113及第二補償膜123對該液晶顯示面板100之視角及對比度之改善有限，該液晶顯示面板100之顯示品質較差。However, due to limitations of the process conditions, the average angle β _{i of} the two compensation films 113 and 123 is not equal to the standard value β ₀ , and there is a deviation from the standard value β ₀ . Therefore, when the user ignores the deviation, When the components of the liquid crystal display panel 100 are arranged in the axial direction, θ ₁ + θ ₂ + θ ₃ = 180 ∘, the first compensation film 113 and the second compensation film 123 cannot perform the best liquid crystal molecules of the liquid crystal layer 130. The optical compensation causes the first compensation film 113 and the second compensation film 123 to have limited improvement in the viewing angle and contrast of the liquid crystal display panel 100, and the display quality of the liquid crystal display panel 100 is poor.

有鑑於此，提供一種顯示品質較佳之液晶顯示面板實為必要。In view of this, it is necessary to provide a liquid crystal display panel with better display quality.

一種液晶顯示面板，其包括一第一基板、一與該第一基板相對設置之第二基板及一夾於該第一基板及第二基板之間之液晶層，該第一基板包括一第一補償膜，該第二基板包括一第二補償膜，該二補償膜之偏差為φ，φ≠0，定義一水平軸，該第一補償膜之補償軸與該水平軸之夾角為θ 1，該第二補償膜之補償軸與該水平軸之夾角為θ 2，該液晶層之液晶分子之旋轉角為θ 3，其中，θ 1＋θ 2＋θ 3＝180∘＋φ' ，φ' 為一修正項，0∘<|φ' |≦|2φ|。A liquid crystal display panel includes a first substrate, a second substrate disposed opposite the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, the first substrate including a first a compensation film, the second substrate includes a second compensation film, the deviation of the two compensation films is φ, φ ≠ 0, defining a horizontal axis, and the angle between the compensation axis of the first compensation film and the horizontal axis is θ 1, The angle between the compensation axis of the second compensation film and the horizontal axis is θ 2 , and the rotation angle of the liquid crystal molecules of the liquid crystal layer is θ 3 , wherein θ 1+θ 2+ θ 3=180∘+φ ' , and φ ' is a correction term. 0∘<|φ ' |≦|2φ|.

一種液晶顯示面板，其包括一液晶層及一補償膜，該液晶層包括複數液晶分子，該補償膜之偏差為φ，φ≠0，定義一水平軸，該補償膜與該水平軸之夾角為θ 1，該液晶層之液晶分子之旋轉角為θ 3，其中，θ 1＋θ 3＝135∘＋φ' ，φ' 為一修正項，0∘<|φ' |≦|2φ|。A liquid crystal display panel comprising a liquid crystal layer and a compensation film, the liquid crystal layer comprising a plurality of liquid crystal molecules, the compensation film having a deviation of φ, φ ≠ 0, defining a horizontal axis, and the angle between the compensation film and the horizontal axis is θ 1, the liquid crystal molecule of the liquid crystal layer has a rotation angle of θ 3 , wherein θ 1 + θ 3 = 135 ∘ + φ ' , φ ' is a correction term, 0 ∘ < | φ ' | ≦ | 2 φ |.

相較於先前技術，本發明液晶顯示面板中，當其補償膜存在偏差φ時，藉由該修正項φ' 調整補償膜與水平軸之夾角或/及該液晶層之液晶分子之旋轉角對該偏差φ進行補償，使得該補償膜可對該液晶層之液晶分子進行較好之光學補償，該液晶顯示面板之顯示品質較高。Compared with the prior art, in the liquid crystal display panel of the present invention, when the compensation film has a deviation φ, the angle between the compensation film and the horizontal axis or/the rotation angle of the liquid crystal molecules of the liquid crystal layer is adjusted by the correction term φ ' The deviation φ is compensated so that the compensation film can perform better optical compensation on the liquid crystal molecules of the liquid crystal layer, and the display quality of the liquid crystal display panel is high.

請參閱圖4，係本發明液晶顯示面板第一實施方式之立體分解示意圖。該液晶顯示面板200包括一第一基板210、一與該第一基板210相對設置之第二基板220及一夾於該第一基板210及第二基板220之間之液晶層230。該第一基板210包括沿遠離該液晶層230方向依序設置之一第一配向膜211、一第一補償膜213及一第一偏光片215。該第二基板220包括沿遠離該液晶層230方向依序設置之一第二配向膜221、一第二補償膜223及一第二偏光片225。該液晶層230包括複數液晶分子(圖未示)。Please refer to FIG. 4 , which is a perspective exploded view of a first embodiment of a liquid crystal display panel of the present invention. The liquid crystal display panel 200 includes a first substrate 210, a second substrate 220 disposed opposite the first substrate 210, and a liquid crystal layer 230 sandwiched between the first substrate 210 and the second substrate 220. The first substrate 210 includes a first alignment film 211, a first compensation film 213 and a first polarizer 215 disposed in a direction away from the liquid crystal layer 230. The second substrate 220 includes a second alignment film 221, a second compensation film 223 and a second polarizer 225 disposed in a direction away from the liquid crystal layer 230. The liquid crystal layer 230 includes a plurality of liquid crystal molecules (not shown).

該第一補償膜213及第二補償膜223均為碟狀液晶分子膜，用於增大該液晶顯示面板200之視角及提高對比度，其均包括複數碟狀液晶分子。請參閱圖5，係碟狀液晶分子膜之示意圖。定義一平行於該液晶顯示面板200之水平軸X及一垂直於該液晶顯示面板200之垂直軸Y。該碟狀液晶分子膜包括複數沿該垂直軸Y依序排列之碟狀液晶分子。該複數碟狀液晶分子與該水平軸X之夾角分別為β₁ 、β₂ 、β₃ ……，且該夾角β₁ 、β₂ 、β₃ ……符合如下規律β₁ <β₂ <β₃ <……。The first compensation film 213 and the second compensation film 223 are all disc-shaped liquid crystal molecular films for increasing the viewing angle of the liquid crystal display panel 200 and improving contrast, and each includes a plurality of discotic liquid crystal molecules. Please refer to FIG. 5, which is a schematic diagram of a discotic liquid crystal molecular film. A horizontal axis X parallel to the liquid crystal display panel 200 and a vertical axis Y perpendicular to the liquid crystal display panel 200 are defined. The discotic liquid crystal molecular film includes a plurality of discotic liquid crystal molecules sequentially arranged along the vertical axis Y. The angle between the plurality of discotic liquid crystal molecules and the horizontal axis X is β ₁ , β ₂ , β ₃ , respectively, and the angles β ₁ , β ₂ , β ₃ ... are in accordance with the following law β ₁ <β ₂ <β ₃ <...

設該二補償膜213、223中所有碟狀液晶分子與該水平軸X之夾角β₁ 、β₂ 、β₃ ……之平均角為β_i 。定義一標準值β₀ ，其視為可以對旋轉角為90∘之液晶層進行最好光學補償之補償膜之平均角。根據該標準值β₀ ，定義該二補償膜213、223之偏差φ為該標準值β₀ 與該平均角β_i 之差β₀ －β_i ，其中，－5∘≦φ≦5∘，且φ≠0。因當φ＝0時，代表該二補償膜213、223無偏差。The average angle between the angles β ₁ , β ₂ , β _{3 ,} ... of all the discotic liquid crystal molecules in the two compensation films 213 and 223 and the horizontal axis X is β _i . A standard value β _{0 is} defined which is considered to be the average angle of the compensation film which can best compensate optically for the liquid crystal layer having a rotation angle of 90 。. The standard value of β _0, define the deviation of the two compensation films 213 and 223 for the standard value of [Phi] β _{₀ 0} -β _i and the difference between the average beta] according to the angle β _i, where, -5∘ ≦ φ ≦ 5∘, and φ≠0. When φ = 0, it means that the two compensation films 213, 223 have no deviation.

舉例來說，當該標準值β₀ 為17∘，該二補償膜213、223之平均角β_i 為16∘時，則該二補償膜213、223之偏差φ＝β₀ －β_i ＝1∘；當該標準值β₀ 為17。，該二補償膜213、223之平均角β_i 為18∘時，則該二補償膜213、223之偏差φ＝β₀ －β_i －1∘。For example, when the standard value β ₀ is 17∘ and the average angle β _i of the two compensation films 213 and 223 is 16∘, the deviation of the two compensation films 213 and 223 is φ=β ₀ -β _i =1 ∘; when the standard value β ₀ is 17. When the average angle β _i of the two compensation films 213 and 223 is 18 ,, the deviation φ of the two compensation films 213 and 223 is β _{0 -} β _i -1 ∘.

該第一配向膜211包括一第一配向軸A1，該第二配向膜221包括一第二配向軸A2。該第一補償膜213包括一第一補償軸W1，該第二補償膜223包括一第二補償軸W2。該第一偏光片215包括一第一偏光軸P1，該第二偏光片225包括一第二偏光軸P2。The first alignment film 211 includes a first alignment axis A1, and the second alignment film 221 includes a second alignment axis A2. The first compensation film 213 includes a first compensation axis W1, and the second compensation film 223 includes a second compensation axis W2. The first polarizer 215 includes a first polarization axis P1, and the second polarizer 225 includes a second polarization axis P2.

請一併參閱圖6，係圖4所示液晶顯示面板200之各元件之軸向示意圖。該第一補償軸W1與該水平軸X之夾角(指銳角)為θ₁ ，該第二補償軸W2與該水平軸X之夾角(指銳角)為θ₂ 。該第一配向軸A1與第二配向軸A2之配向夾角為θ₃ ，即該液晶層230之液晶分子在該第一配向膜211及第二配向膜221之作用下呈旋轉角為θ₃ 之扭轉向列式排列。Please refer to FIG. 6 for an axial view of the components of the liquid crystal display panel 200 shown in FIG. The angle between the first compensation axis W1 and the horizontal axis X (refer to an acute angle) is θ ₁ , and the angle between the second compensation axis W2 and the horizontal axis X (refer to an acute angle) is θ ₂ . The alignment angle between the first alignment axis A1 and the second alignment axis A2 is θ ₃ , that is, the liquid crystal molecules of the liquid crystal layer 230 have a rotation angle of θ ₃ under the action of the first alignment film 211 and the second alignment film 221 . Twisted nematic arrangement.

定義：該第一配向軸A1與該水平軸X之夾角為θ 4(圖未示)，該第二配向軸A2與該水平軸X之夾角(指銳角)為θ₅ (圖未示)；該第一配向軸A1與第一補償軸W1為夾角(指銳角)θ₆ (圖未示)，該第二配向軸A2與第一補償軸W2為夾角(指銳角)θ₇ (圖未示)。Definition: the angle between the first alignment axis A1 and the horizontal axis X is θ 4 (not shown), and the angle between the second alignment axis A2 and the horizontal axis X (refer to the acute angle) is θ ₅ (not shown); The first alignment axis A1 and the first compensation axis W1 are at an angle (refer to an acute angle) θ ₆ (not shown), and the second alignment axis A2 is at an angle (refer to an acute angle) θ ₇ with the first compensation axis W2 (not shown) ).

其中，40∘≦θ 1≦50∘；40∘≦θ₂ ≦50∘；85∘≦θ₃ ≦95∘；85∘≦θ₁ ＋θ₂ ≦95∘；40∘≦θ₄ ≦50∘；40∘≦θ₅ ≦50∘；0∘≦θ₆ ≦10∘；0∘≦θ₇ ≦10∘；θ₄ ＋θ₅ ＝θ₃ 。該θ₁ 、θ₂ 、θ₃ 滿足如下公式：θ₁ ＋θ₂ ＋θ₃ ＝180∘＋φ' ，φ' 定義為一修正項，當φ為負值時，2 φ<φ' <0；當φ為正值時，0<φ' <2 φ，即0∘<|φ' |≦|2φ|，優選的：當φ為負值時，φ<φ' <0；當φ為正值時，0<φ' <φ，即0∘<|φ' |≦|φ|。Wherein, 40∘≦θ 1≦50∘; 40∘≦θ ₂ ≦50∘; 85∘≦θ ₃ ≦95∘;85∘≦θ ₁ +θ ₂ ≦95∘;40∘≦θ ₄ ≦50∘;40 ∘≦ θ ₅ ≦ 50 ∘; 0 ∘≦ θ ₆ ≦ 10 ∘; 0 ∘≦ θ ₇ ≦ 10 ∘; θ ₄ + θ ₅ = θ ₃ . The θ ₁ , θ ₂ , and θ ₃ satisfy the following formula: θ ₁ + θ ₂ + θ ₃ = 180 ∘ + φ ' , φ ' is defined as a correction term, and when φ is a negative value, 2 φ < φ ' <0; When it is positive, 0<φ ' <2 φ, that is, 0∘<|φ ' |≦|2φ|, preferably: when φ is a negative value, φ<φ ' <0; when φ is a positive value, 0<φ ' <φ, ie 0∘<|φ ' |≦|φ|.

於本實施例中，θ₁ 、θ₂ 、θ₄ 均為45∘，θ₆ 為0∘，θ₇ 為1∘，φ' ＝φ＝－1∘，根據上述公式可知，θ₃ ＝180∘＋φ－(θ₁ ＋θ₂ )＝90∘＋φ＝89∘，該θ₅ ＝θ₃ －θ₄ ＝＝44∘。In the present embodiment, θ ₁ , θ ₂ , and θ ₄ are both 45 ∘, θ ₆ is 0 ∘, θ ₇ is 1 ∘, and φ ' = φ = -1 ∘. According to the above formula, θ ₃ = 180 ∘ +φ - (θ ₁ + θ ₂ ) = 90 ∘ + φ = 89 ∘, θ ₅ = θ _{3 -} θ ₄ == 44 ∘.

該第一偏光軸P1與第二偏光軸P2垂直，且該第一偏光軸P1及第二偏光軸P2與該水平X軸之夾角均為45∘。因此，該第一偏光軸P1與該第一補償軸W1及該第一配向軸A1重合。該第二偏光軸P2與該第二補償軸W2重合。The first polarization axis P1 is perpendicular to the second polarization axis P2, and the angle between the first polarization axis P1 and the second polarization axis P2 and the horizontal X axis is 45 ∘. Therefore, the first polarization axis P1 coincides with the first compensation axis W1 and the first alignment axis A1. The second polarization axis P2 coincides with the second compensation axis W2.

相較於先前技術，本發明液晶顯示面板200中，當該二補償膜213、223存在－1∘之偏差φ時，將該第一配向軸A1及第二配向軸A2之配向夾角θ₃ (即該液晶層230之液晶分子之旋轉角θ₃ )對應設置為90∘＋φ＝89∘，由於該液晶層230之液晶分子之旋轉角θ₃ 改變從而對該偏差φ進行補償，使得該二補償膜213、223可對該液晶層230之液晶分子進行較好之光學補償，提高該液晶顯示面板200之顯示品質。Compared with the prior art, in the liquid crystal display panel 200 of the present invention, when the two compensation films 213 and 223 have a deviation φ of -1 ,, the alignment angle θ _{3 between} the first alignment axis A1 and the second alignment axis A2 ( That is, the rotation angle θ ₃ of the liquid crystal molecules of the liquid crystal layer 230 is correspondingly set to 90 ∘ + φ = 89 ∘, and the deviation φ is compensated because the rotation angle θ ₃ of the liquid crystal molecules of the liquid crystal layer 230 is changed, so that the two compensations The films 213 and 223 can perform better optical compensation on the liquid crystal molecules of the liquid crystal layer 230 to improve the display quality of the liquid crystal display panel 200.

請參閱圖7，係本發明液晶顯示面板第二實施方式之各元件之軸向示意圖。該實施方式之液晶顯示面板與第一實施方式之液晶顯示面板200之區別在於：液晶層之液晶分子之旋轉角θ₃ 為90∘，第二配向軸A2與水平軸X之夾角θ₂ 為45∘，第一配向軸A1與水平軸X之夾角θ₁ ＝180∘＋φ' －(θ₂ ＋θ₃ )＝＝180∘＋φ－(θ₂ ＋θ₃ )，即各參數滿足公式θ₁ ＋θ₃ ＝135∘＋φ' ＝135∘＋φ；θ₁ ＝45∘＋φ＝44∘。Please refer to FIG. 7, which is an axial schematic view of each element of the second embodiment of the liquid crystal display panel of the present invention. The difference between the liquid crystal display panel of this embodiment and the liquid crystal display panel 200 of the first embodiment is that the liquid crystal molecules of the liquid crystal layer have a rotation angle θ ₃ of 90 ∘, and the angle θ ₂ between the second alignment axis A2 and the horizontal axis X is 45. ∘, the angle between the first alignment axis A1 and the horizontal axis X is θ ₁ = 180 ∘ + φ ' - (θ ₂ + θ ₃ ) == 180 ∘ + φ - (θ ₂ + θ ₃ ), that is, each parameter satisfies the formula θ ₁ + θ ₃ = 135∘+φ ' =135∘+φ; θ ₁ =45∘+φ=44∘.

相較於先前技術，本實施方式之液晶顯示面板藉由改變該第一補償軸W1與該水平軸X之夾角θ₁ 對該偏差φ進行對應之補償，使得二補償膜可對該液晶層之液晶分子進行較好之光學補償，該液晶顯示面板之顯示品質較高。Compared with the prior art, the liquid crystal display panel of the present embodiment compensates the deviation φ by changing the angle θ ₁ between the first compensation axis W1 and the horizontal axis X, so that the two compensation films can be used for the liquid crystal layer. The liquid crystal molecules perform better optical compensation, and the display quality of the liquid crystal display panel is high.

請參閱圖8，係本發明液晶顯示面板第三實施方式之各元件之軸向示意圖。該實施方式之液晶顯示面板與第一實施方式之液晶顯示面板200之區別在於：液晶層之液晶分子之旋轉角θ₃ 為90∘，第一配向軸A1與水平軸X之夾角θ₁ 為45∘，第二配向軸A2與水平軸X之夾角θ₂ ＝180∘＋φ' －(θ₁ ＋θ₃ )＝180∘＋φ－(θ₁ ＋θ₃ )，即各參數滿足公式θ₂ ＋θ₃ ＝135∘＋φ' ＝135∘＋φ；θ₂ ＝45∘＋φ＝44∘。Please refer to FIG. 8 , which is a schematic axial view of each component of the third embodiment of the liquid crystal display panel of the present invention. The difference between the liquid crystal display panel of this embodiment and the liquid crystal display panel 200 of the first embodiment is that the liquid crystal molecules of the liquid crystal layer have a rotation angle θ ₃ of 90 ∘, and the angle θ ₁ between the first alignment axis A1 and the horizontal axis X is 45. ∘, the angle between the second alignment axis A2 and the horizontal axis X is θ ₂ = 180 ∘ + φ ' - (θ ₁ + θ ₃ ) = 180 ∘ + φ - (θ ₁ + θ ₃ ), that is, each parameter satisfies the formula θ ₂ + θ ₃ = 135 ∘+φ ' =135∘+φ; θ ₂ =45∘+φ=44∘.

相較於先前技術，本實施方式之液晶顯示面板藉由改變第二補償軸W2與該水平軸X之夾角θ₂ 對該偏差φ進行對應之補償，使得二補償膜可對該液晶層之液晶分子進行較好之光學補償，該液晶顯示面板之顯示品質較高。Compared with the prior art, the liquid crystal display panel of the present embodiment compensates the deviation φ by changing the angle θ ₂ between the second compensation axis W2 and the horizontal axis X, so that the two compensation films can be liquid crystal of the liquid crystal layer. The molecules are better optically compensated, and the display quality of the liquid crystal display panel is high.

請參閱圖9，係本發明液晶顯示面板第四實施方式之各元件之軸向示意圖。該實施方式之液晶顯示面板與第一實施方式之液晶顯示面板200之區別在於：φ＝φ' ＝1∘，θ₁ ＝θ₂ ＝46∘，θ₃ ＝89∘，θ 4＝45∘，θ₄ ＝＝44∘，θ₆ ＝1∘，θ₇ ＝1∘。Please refer to FIG. 9, which is an axial schematic view of each component of the fourth embodiment of the liquid crystal display panel of the present invention. The liquid crystal display panel of this embodiment differs from the liquid crystal display panel 200 of the first embodiment in that φ = φ ' = ₁ ∘, θ ₁ = θ ₂ = 46 ∘, θ ₃ = 89 ∘, θ 4 = 45 ∘, θ ₄ == 44 ∘, θ ₆ =1 ∘, θ ₇ =1 ∘.

相較於先前技術，本實施方式之液晶顯示面板中，θ₁ 、θ₂ 、θ₃ 符合公式：θ₁ ＋θ₂ ＋θ₃ ＝180∘＋φ' ，且其係藉由改變θ₁ 、θ₂ 、θ₃ 三參數對該偏差φ進行對應之補償，使該液晶顯示面板之顯示品質提高。Compared with the prior art, in the liquid crystal display panel of the present embodiment, θ ₁ , θ ₂ , and θ ₃ conform to the formula: θ ₁ + θ ₂ + θ ₃ = 180 ∘ + φ ' , and the θ ₁ , θ _{2 are} changed by The θ ₃ three parameter compensates for the deviation φ to improve the display quality of the liquid crystal display panel.

請參閱圖10，係本發明液晶顯示面板第五實施方式之立體分解示意圖。該液晶顯示面板600與第一實施方式之液晶顯示面板200之區別在於：第一偏光軸P1與第二補償軸W1重合，第二偏光軸P2與第一補償軸W2重合。Please refer to FIG. 10 , which is a perspective exploded view of a fifth embodiment of a liquid crystal display panel of the present invention. The liquid crystal display panel 600 differs from the liquid crystal display panel 200 of the first embodiment in that the first polarization axis P1 overlaps with the second compensation axis W1, and the second polarization axis P2 overlaps with the first compensation axis W2.

本發明液晶顯示面板亦可具其他多種變更設計，如：當該θ₁ 、θ₂ 、θ₃ 在可取範圍內，且其符合公式θ₁ ＋θ₂ ＋θ₃ ＝180∘＋φ' ，調整該θ₁ 、θ₂ 、θ₃ 中任意二參數或者該θ₁ 、θ₂ 、θ₃ 三個參數都可以對該偏差φ進行補償，以提高液晶顯示面板之顯示品質；另，對於僅使用一補償膜且該補償膜之偏差為φ之液晶顯示面板，可藉由調整該補償膜之補償軸與水平軸之夾角θ₁ 及該液晶層之液晶分子之旋轉角θ₃ 補償該偏差φ，使其滿足公式：θ₁ ＋θ₃ ＝135∘＋φ' ；又，需要說明是，當φ' ＝φ時，該修正項φ'完全補償該偏差φ，進而液晶顯示面板可達到最好之補償效果，然，該修正項φ'亦可不等於φ，而係符合“當φ為負值時，2 φ<φ' <0；當φ為正值時，0<φ' <2 φ”之條件，使得該修正項φ'亦可在一定程度上部份補償或者部份過補償該偏差φ，相較於先前技術之液晶顯示面板，其顯示品質仍有提高。The liquid crystal display panel of the present invention may also have various other modified designs, such as: when the θ ₁ , θ ₂ , θ _{3 are} within a desirable range, and they conform to the formula θ ₁ + θ ₂ + θ ₃ = 180 ∘ + φ ' , adjust the θ ₁ , θ _2, θ _3, or any two of the parameters θ _1, θ _2, θ ₃ three parameters can compensate for this deviation [Phi], in order to improve the quality of the liquid crystal display panel; the other, using only a compensation film and The liquid crystal display panel with a deviation of φ of the compensation film can compensate the deviation φ by adjusting the angle θ ₁ between the compensation axis of the compensation film and the horizontal axis and the rotation angle θ ₃ of the liquid crystal molecules of the liquid crystal layer to satisfy the formula : θ ₁ + θ ₃ = 135 ∘ + φ ' ; again, it should be noted that when φ ' = φ, the correction term φ' completely compensates for the deviation φ, and the liquid crystal display panel can achieve the best compensation effect, however, The correction term φ' may not be equal to φ, but is consistent with "when φ is a negative value, 2 φ < φ ' <0; when φ is a positive value, a condition of 0 < φ ' < 2 φ" causes the correction term Φ' can also partially compensate or partially compensate for the deviation φ, as compared to the first The display quality of the liquid crystal display panel of the prior art is still improved.

綜上所述，本發明確已符合發明專利之要件，爰依法提出專利申請。惟，以上所述者僅為本發明之較佳實施方式，本發明之範圍並不以上述實施例為限，該舉凡熟悉本案技藝之人士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範圍內。In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. All should be covered by the following patent application.

液晶顯示面板‧‧‧200、600LCD panel ‧‧200,600

第一基板‧‧‧210First substrate ‧‧‧210

第二基板‧‧‧220Second substrate ‧‧‧220

液晶層‧‧‧230LCD layer ‧‧230

第一配向膜‧‧‧211First alignment film ‧‧‧211

第一補償膜‧‧‧213First compensation film ‧‧‧213

第一偏光片‧‧‧215First polarizer ‧ ‧ 215

第二配向膜‧‧‧221Second alignment film ‧ ‧ 221

第二補償膜‧‧‧223Second compensation film ‧‧‧223

第二偏光片‧‧‧225Second polarizer ‧ ‧ 225

圖1係一種先前技術液晶顯示面板之立體分解示意圖。1 is a perspective exploded view of a prior art liquid crystal display panel.

圖2係圖1所示液晶顯示面板之各元件之軸向示意圖。2 is an axial schematic view of the components of the liquid crystal display panel shown in FIG. 1.

圖3係碟狀液晶分子膜之結構示意圖。Fig. 3 is a schematic view showing the structure of a discotic liquid crystal molecular film.

圖4係本發明液晶顯示面板第一實施方式之立體分解示意圖。4 is a perspective exploded view of a first embodiment of a liquid crystal display panel of the present invention.

圖5係碟狀液晶分子膜之結構示意圖。Fig. 5 is a schematic view showing the structure of a discotic liquid crystal molecular film.

圖6係圖4所示液晶顯示面板之各元件之軸向示意圖。Figure 6 is an axial schematic view of the components of the liquid crystal display panel shown in Figure 4.

圖7係本發明液晶顯示面板第二實施方式之各元件之軸向示意圖。Figure 7 is a schematic axial view of the components of the second embodiment of the liquid crystal display panel of the present invention.

圖8係本發明液晶顯示面板第三實施方式之各元件之軸向示意圖。Fig. 8 is a schematic axial view of each element of the third embodiment of the liquid crystal display panel of the present invention.

圖9係本發明液晶顯示面板第四實施方式之各元件之軸向示意圖。Figure 9 is a schematic axial view of the components of the fourth embodiment of the liquid crystal display panel of the present invention.

圖10係本發明液晶顯示面板第五實施方式之立體分解示意圖。Figure 10 is a perspective exploded view showing a fifth embodiment of the liquid crystal display panel of the present invention.

液晶顯示面板‧‧‧200LCD panel ‧‧200

第一基板‧‧‧210First substrate ‧‧‧210

第二基板‧‧‧220Second substrate ‧‧‧220

液晶層‧‧‧230LCD layer ‧‧230

第一配向膜‧‧‧211First alignment film ‧‧‧211

第一補償膜‧‧‧213First compensation film ‧‧‧213

第一偏光片‧‧‧215First polarizer ‧ ‧ 215

第二配向膜‧‧‧221Second alignment film ‧ ‧ 221

第二補償膜‧‧‧223Second compensation film ‧‧‧223

第二偏光片‧‧‧225Second polarizer ‧ ‧ 225

Claims

一種液晶顯示面板，其包括：一第一基板、一與該第一基板相對設置之第二基板及一夾於該第一基板及第二基板之間之液晶層，該第一基板包括一第一補償膜以及一第一偏光片，該第二基板包括一第二補償膜以及一第第二偏光片，該二補償膜之偏差為φ，φ≠0，定義一平行該液晶顯示面板之水平軸，該第一補償膜之補償軸與該水平軸之夾角為θ₁ ，該第二補償膜之補償軸與該水平軸之夾角為θ₂ ，該液晶層之液晶分子之旋轉角為θ₃ ，其中，θ₁ +θ₂ +θ₃ =180°+φ' ，φ' 為一修正項，0°<| φ' |<|2 φ |；其中，該第一偏光片之偏光軸與該第二偏光片之偏光軸垂直，且該第一偏光片之偏光軸及第二偏光片之偏光軸與該水平軸之夾角均為45°。A liquid crystal display panel includes a first substrate, a second substrate disposed opposite the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, the first substrate including a first substrate a compensation film and a first polarizer, the second substrate includes a second compensation film and a second polarizer, and the deviation of the two compensation films is φ, φ ≠ 0, defining a level parallel to the liquid crystal display panel The axis, the angle between the compensation axis of the first compensation film and the horizontal axis is θ ₁ , the angle between the compensation axis of the second compensation film and the horizontal axis is θ ₂ , and the rotation angle of the liquid crystal molecules of the liquid crystal layer is θ ₃ Where θ ₁ + θ ₂ + θ ₃ = 180° + φ ' , φ ' is a correction term, 0° <| φ ' | <|2 φ |; wherein the polarization axis of the first polarizer and the The polarizing axis of the second polarizer is perpendicular, and the polarizing axis of the first polarizer and the polarizing axis of the second polarizer are both at an angle of 45° with the horizontal axis.

如申請專利範圍第1項所述之液晶顯示面板，其中，當φ為負值時，2 φ<φ' <0；當φ為正值時，0<φ' <2 φ。The liquid crystal display panel according to claim 1, wherein when φ is a negative value, 2 φ < φ ' <0; when φ is a positive value, 0 < φ ' < 2 φ.

如申請專利範圍第1項所述之液晶顯示面板，其中，當φ為負值時，φ≦φ' <0；當φ為正值時，0<φ' ≦φ。The liquid crystal display panel according to claim 1, wherein when φ is a negative value, φ ≦ φ ' <0; when φ is a positive value, 0 < φ ' ≦ φ.

如申請專利範圍第1項所述之液晶顯示面板，其中，φ' =φ。The liquid crystal display panel of claim 1, wherein φ ' = φ.

如申請專利範圍第1項所述之液晶顯示面板，其中，0°≦θ₁ ≦50°，40°≦θ₂ ≦50°，85°≦θ₃ ≦95°。The liquid crystal display panel of claim 1, wherein 0° ≦ θ ₁ ≦ 50°, 40° ≦ θ ₂ ≦ 50°, 85° ≦ θ ₃ ≦ 95°.

如申請專利範圍第1項所述之液晶顯示面板，其中，φ' =φ=-1°，θ₁ =θ₂ =45°，θ₃ =89°。The liquid crystal display panel according to claim 1, wherein φ ' = φ = -1°, θ ₁ = θ ₂ = 45°, and θ ₃ = 89°.

如申請專利範圍第1項所述之液晶顯示面板，其中，φ'=φ=1°，θ₁ =θ₂ =46°，θ₃ =89°。The liquid crystal display panel according to claim 1, wherein φ' = φ = 1°, θ ₁ = θ ₂ = 46°, and θ ₃ = 89°.

如申請專利範圍第1項所述之液晶顯示面板，其中，該第一基板進一步包括一第一配向膜，該第二基板進一步包括一第二配向膜，用於該液晶層之液晶分子配向。 The liquid crystal display panel of claim 1, wherein the first substrate further comprises a first alignment film, and the second substrate further comprises a second alignment film for alignment of liquid crystal molecules of the liquid crystal layer.

如申請專利範圍第8項所述之液晶顯示面板，其中，該第一配向膜之配向軸與該水平軸之夾角為θ₄ ，該第二配向膜之配向軸與該水平軸之夾角為θ₅ ，該旋轉角θ₃ =θ₄ +θ₅ 。The liquid crystal display panel of claim 8, wherein an angle between the alignment axis of the first alignment film and the horizontal axis is θ ₄ , and an angle between the alignment axis of the second alignment film and the horizontal axis is θ ₅ , the rotation angle θ ₃ = θ ₄ + θ ₅ .

如申請專利範圍第9項所述之液晶顯示面板，其中，0°≦θ₄ ≦50°，40°≦θ₅ ≦50°。The liquid crystal display panel of claim 9, wherein 0° ≦ θ ₄ ≦ 50°, 40° ≦ θ ₅ ≦ 50°.

如申請專利範圍第9項所述之液晶顯示面板，其中，該第一配向膜之配向軸與第一補償膜之補償軸為夾角θ₆ ，0°≦θ₆ ≦10°。The liquid crystal display panel of claim 9, wherein the alignment axis of the first alignment film and the compensation axis of the first compensation film are at an angle θ ₆ , 0° ≦ θ ₆ ≦ 10°.

如申請專利範圍第9項所述之液晶顯示面板，其中，該第二配向膜之配向軸與第二補償膜之補償軸為夾角θ₇ ，0°≦θ₇ ≦10°。The liquid crystal display panel of claim 9, wherein the alignment axis of the second alignment film and the compensation axis of the second compensation film are at an angle θ ₇ , 0° ≦ θ ₇ ≦ 10°.

如申請專利範圍第1項所述之液晶顯示面板，其中，該第一補償膜及第二補償膜均為碟狀液晶分子膜。 The liquid crystal display panel of claim 1, wherein the first compensation film and the second compensation film are all discotic liquid crystal molecular films.

一種液晶顯示面板，其包括一液晶層、一補償膜、一第一偏光片及一第二偏光片，該液晶層包括複數液晶分子，該補償膜之偏差為φ，φ≠0，定義一與該液晶顯示面板平行之水平軸，該補償膜與該水平軸之夾角為θ₁ ，該液晶層之液晶分子之旋轉角為θ₃ ，其中，θ₁ +θ₃ =135°+φ' ，φ' 為一修正項，0°<| φ' |<|2 φ |；其中，該第一偏光片之偏光軸與該第二偏光片之偏光軸垂直，且該第一偏光片之偏光軸及第二偏光片之偏光軸與該水平軸之夾角均為45°。A liquid crystal display panel comprising a liquid crystal layer, a compensation film, a first polarizer and a second polarizer, the liquid crystal layer comprising a plurality of liquid crystal molecules, the deviation of the compensation film being φ, φ ≠ 0, defining a The horizontal axis of the liquid crystal display panel is parallel, the angle between the compensation film and the horizontal axis is θ ₁ , and the rotation angle of the liquid crystal molecules of the liquid crystal layer is θ ₃ , wherein θ ₁ + θ ₃ = 135° + φ ' , φ ' is a correction term, 0°<| φ ' |<|2 φ |; wherein the polarization axis of the first polarizer is perpendicular to the polarization axis of the second polarizer, and the polarization axis of the first polarizer The angle between the polarization axis of the second polarizer and the horizontal axis is 45°.

如申請專利範圍第14項所述之液晶顯示面板，其中，當φ為負值時，2 φ<φ' <0；當φ為正值時，0<φ' <2 φ。The liquid crystal display panel according to claim 14, wherein when φ is a negative value, 2 φ < φ ' <0; when φ is a positive value, 0 < φ ' < 2 φ.

如申請專利範圍第14項所述之液晶顯示面板，其中，當φ為負值時，φ≦φ' <0；當φ為正值時，0<φ' ≦φ。The liquid crystal display panel according to claim 14, wherein when φ is a negative value, φ ≦ φ ' <0; when φ is a positive value, 0 < φ ' ≦ φ.

如申請專利範圍第14項所述之液晶顯示面板，其中，φ' =φ。The liquid crystal display panel of claim 14, wherein φ ' = φ.

如申請專利範圍第14項所述之液晶顯示面板，其中，0°≦θ₁ ≦50°，85°≦θ₃ ≦95°。The liquid crystal display panel of claim 14, wherein 0° ≦ θ ₁ ≦ 50°, 85° ≦ θ ₃ ≦ 95°.

如申請專利範圍第14項所述之液晶顯示面板，其進一步包括一第一配向膜及一第二配向膜，用於該液晶層之液晶分子配向。 The liquid crystal display panel of claim 14, further comprising a first alignment film and a second alignment film for alignment of liquid crystal molecules of the liquid crystal layer.

如申請專利範圍第19項所述之液晶顯示面板，其中，該第一配向膜之配向軸與該水平軸之夾角為θ₄ ，該第二配向膜之配向軸與該水平軸之夾角為θ₅ ，該旋轉角θ₃ =θ₄ +θ₅ 。The liquid crystal display panel of claim 19, wherein an angle between the alignment axis of the first alignment film and the horizontal axis is θ ₄ , and an angle between the alignment axis of the second alignment film and the horizontal axis is θ ₅ , the rotation angle θ ₃ = θ ₄ + θ ₅ .

如申請專利範圍第20項所述之液晶顯示面板，其中，40°≦θ₄ ≦50°，40°≦θ₅ ≦50°。The liquid crystal display panel of claim 20, wherein 40° ≦ θ ₄ ≦ 50°, 40° ≦ θ ₅ ≦ 50°.

如申請專利範圍第20項所述之液晶顯示面板，其中，該第一配向膜之配向軸與補償膜之補償軸為夾角θ₆ ，0°≦θ₆ ≦10°。The liquid crystal display panel of claim 20, wherein the alignment axis of the first alignment film and the compensation axis of the compensation film are at an angle θ ₆ , 0° ≦ θ ₆ ≦ 10°.

如申請專利範圍第14項所述之液晶顯示面板，其中，該補償膜為碟狀液晶分子膜。The liquid crystal display panel of claim 14, wherein the compensation film is a discotic liquid crystal molecular film.