TWI567464B - 液晶顯示面板 - Google Patents
液晶顯示面板 Download PDFInfo
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- TWI567464B TWI567464B TW104140042A TW104140042A TWI567464B TW I567464 B TWI567464 B TW I567464B TW 104140042 A TW104140042 A TW 104140042A TW 104140042 A TW104140042 A TW 104140042A TW I567464 B TWI567464 B TW I567464B
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/0009—Materials therefor
- G02F1/0045—Liquid crystals characterised by their physical properties
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1393—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13712—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
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Description
本發明是有關於一種液晶顯示面板,且特別是有關於一種具有特定液晶材料與特定畫素結構搭配的液晶顯示面板。
無輻射、高畫質等優越特性的平面顯示面板(flat display panels)已成為市場主流。常見的平面顯示器包括液晶顯示器(liquid crystal displays)、電漿顯示器(plasma displays)、有機電激發光顯示器(electroluminescent displays)等。以目前最普及的液晶顯示器為例,液晶顯示器主要是由畫素陣列基板、彩色濾光基板以及夾設於二者之間的液晶層所構成。一般來說,液晶層中的液晶分子具有擴張彈性係數k11以及彎曲彈性係數k33。這兩個係數能控制液晶分子的形變,進而控制當液晶分子被驅動時的排列方式。在現行的液晶顯示面板中,主要是使用k11約相等於k33的材料作為液晶層。然而,這樣的液晶材料並不能有效地在高解析度下提高顯示面板的光穿透率。因此,如何在高解析度下優化光穿透率,實為研發人員亟欲解決的議題之一。
本發明提供一種液晶顯示面板,其能有效地提高光穿透率。
本發明的液晶顯示面板包括第一基板、多條掃描線、多條資料線、多個畫素結構、第二基板、對向電極層以及液晶層。掃描線以及資料線位於第一基板上。畫素結構位於第一基板上,且電性連接於所對應的多條掃描線其中一條和多條資料線的其中一條。每一畫素結構包括第一主動元件以及第一畫素電極。第一主動元件電性連接至掃描線其中之一與資料線其中之一。第一畫素電極電性連接至第一主動元件。第一畫素電極具有多個第一條狀部,且相鄰的第一條狀部之間定義出一第一狹縫。第一條狀部具有一寬度L,第一狹縫具有一寬度S,第一條狀部之間具有一間距p,且p=L+S。第二基板位於第一基板的對向。對向電極層配置於第二基板上且位於第一基板與第二基板之間。液晶層配置於第一基板與第二基板之間,液晶層在第一基板與第二基板之間具有一厚度d。液晶層具有一擴張彈性係數k11以及一彎曲彈性係數k33,且0<k11/k33<1。液晶顯示面板符合下述式(1):
基於上述,本發明的液晶顯示面板藉由選擇具有0<k11/k33<1特性以及特定厚度的液晶材料,並搭配滿足式(1)的特定畫素結構的設計,能夠有效地提高液晶顯示面板的光穿透率。
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。
10‧‧‧液晶顯示面板
100‧‧‧第一基板
200‧‧‧第二基板
300‧‧‧主動元件陣列層
400‧‧‧對向電極
502‧‧‧第一配向層
504‧‧‧第二配向層
600‧‧‧液晶層
SL1~SLn‧‧‧掃描線
DL1~DLn‧‧‧資料線
P‧‧‧畫素結構
T1‧‧‧第一主動元件
T2‧‧‧第二主動元件
G1‧‧‧第一閘極
G2‧‧‧第二閘極
CH1‧‧‧第一通道層
CH2‧‧‧第二通道層
S1‧‧‧第一源極
S2‧‧‧第二源極
D1‧‧‧第一汲極
D2‧‧‧第二汲極
C1‧‧‧第一接觸窗
C2‧‧‧第二接觸窗
PE1‧‧‧第一畫素電極
PE2‧‧‧第二畫素電極
700‧‧‧第一主體部
702‧‧‧第一條狀部
704‧‧‧第一狹縫
706‧‧‧第二條狀部
708‧‧‧第二狹縫
710‧‧‧第二主體部
d‧‧‧厚度
L、S‧‧‧寬度
p‧‧‧間距
A、B‧‧‧區域
圖1是根據本發明一實施例的液晶顯示面板的剖面示意圖。
圖2是圖1的液晶顯示面板中的主動元件層的上視示意圖。
圖3是圖2的主動元件層中的畫素結構的放大上視示意圖。
圖4是圖3的畫素結構中的部份區域的放大上視示意圖。
圖5是習知的液晶顯示面板以及本發明一實施例的液晶顯示面板之穿透率-電壓曲線圖。
圖6是本發明圖3的實施例的液晶顯示面板在不同的k11/k33比值下其穿透率對條狀部間距的變化之柱狀圖。
圖7是根據本發明另一實施例的畫素結構的放大上視示意圖。
圖8是圖7的畫素結構中的部份區域的放大上視示意圖。
圖9是本發明圖7的實施例的液晶顯示面板在不同的k11/k33比值下其穿透率對條狀部間距的變化之柱狀圖。
圖1是根據本發明一實施例的液晶顯示面板10的剖面示意圖。請參照圖1,液晶顯示面板10包括第一基板100、第二基板200、主動元件陣列層300、對向電極層400、第一配向層502、
第二配向層504以及液晶層600。
第一基板100之材質可為玻璃、石英、有機聚合物或是金屬等等。第一基板100上包括設置有主動元件陣列層300,而有主動元件陣列層300將於後續段落作詳細說明。
第二基板200是設置在第一基板100的對向側。第二基板200之材質可為玻璃、石英或有機聚合物等等。具體來說,當第一基板100的材質不為金屬時,第二基板200的材質可以與第一基板100的材質相同或不同。除此之外,為了使液晶顯示面板100可呈現多彩化的顯示效果,第一基板100或第二基板200可以具有彩色濾光層(未繪示),其包括紅、綠、藍色濾光圖案。亦即,第二基板200可以是彩色濾光基板或是第一基板100可以是彩色濾光層製作於畫素陣列上(Color filter on Array,COA)或是畫素陣列製作於彩色濾光層上(Array on Color filter,AOC)的設計。另外,液晶顯示面板10更可包括設置遮光圖案層(或稱為黑矩陣,未繪示)於第二基板200或第一基板100上,設置於彩色濾光陣列的濾光圖案之間。
第二基板200上包括設置有對向電極層400,且對向電極層400位於第一基板100以及第二基板200之間。對向電極層400為透明導電層,其材質包括金屬氧化物,例如是銦錫氧化物或者是銦鋅氧化物。對向電極層400是全面地覆蓋於第二基板200上或圖案化的設置於第二基板200上。在本實施例中,對向電極層400連接至一共用電壓(Vcom),且當一不同於共用電壓的電壓被
施加於主動元件陣列層300時,主動元件陣列層300以及對向電極層400之間會產生垂直電場,以驅動在主動元件陣列層300以及對向電極層400之間的液晶層600中的液晶分子。
第一配向層502配置於主動元件陣列層300上,以對液晶層600進行配向作用。另一方面,第二配向層504配置於對向電極層400上,以對液晶層600進行配向作用。第一配向層502以及第二配向層504例如是有機材料,且可以是採用接觸式或是非接觸式配向方式對液晶層600進行配向。在本實施例中,第一配向層502以及第二配向層504並不需要經過摩擦取向(Rubbing)程序。
液晶層600位於第一配向層502以及第二配向層504形成的空間中。在本實施例中,液晶層600為負型液晶,且其介電異相性△ε介於-2.0至-5.0之間。另一方面,液晶層600的厚度為d,且厚度d介於2.7μm至3.5μm之間。由於本實施例之液晶顯示面板為使用聚合物穩定配向(Polymer-Stabilized Alignment,PSA)技術之液晶顯示面板,因此在液晶層600中除了液晶分子之外,還包括單體化合物。換言之,在此顯示面板尚未進行單體化合物之照光程序時,液晶層600中包含有液晶分子以及單體化合物。當此顯示面板於進行單體化合物之照光程序時,單體化合物會進行聚合反應而於主動元件陣列層300之表面形成聚合物薄膜。因此當此液晶顯示面板於進行單體化合物之照光程序之後,此時液晶層600主要為液晶分子。
在本實施例中,液晶層600中液晶分子基本上具有擴張彈性係數k11介於1.1x10-11牛頓至2.0x10-11牛頓之間,與彎曲彈性係數k33介於1.1x10-11牛頓至2.0x10-11牛頓之間。除此之外,液晶層600的k11以及k33的比值k11/k33介於0至1之間,且較佳為0<k11/k33<0.87。
圖2是圖1的液晶顯示面板中的主動元件層300的上視示意圖。以下將針對主動元件陣列層300做詳細解說。請先參照圖2,主動元件陣列層300包括多條掃描線SL1~SLn、多條資料線DL1~DLn以及多個畫素結構P。掃描線SL1~SLn與資料線DL1~DLn彼此交錯設置,且各畫素結構電性連接於所對應的掃描線SL1~SLn其中一條和資料線DL1~DLn其中一條。本發明之實施例,係以掃描線SL1~SLn與資料線DL1~DLn彼此交錯設置形成多個畫素結構P,但不限於此。本發明之實施例,係以掃描線SL1~SLn的延伸方向與資料線DL1~DLn的延伸方向不平行。較佳的是,掃描線SL1~SLn的延伸方向與資料線DL1~DLn的延伸方向垂直。基於導電性的考量,掃描線SL1~SLn與資料線DL1~DLn之間夾有絕緣層。掃描線SL1~SLn與資料線DL1~DLn一般是使用金屬材料。然,本發明不限於此,根據其他實施例,掃描線SL1~SLn與資料線DL1~DLn也可以使用其他導電材料。例如:合金、金屬材料的氮化物、金屬材料的氧化物、金屬材料的氮氧化物、或其它合適的材料)、或是金屬材料與其它導電材料的堆疊層。
圖3是圖2的主動元件層300中的畫素結構P的放大上
視示意圖。請參照圖3,每一畫素結構P包括第一主動元件T1以及第一畫素電極PE1。第一主動元件T1包括第一閘極G1、第一通道層CH1、第一源極S1以及第一汲極D1。請參照圖3,在本實施例中,第一主動元件T1與對應的掃描線(以掃描線SL1為範例)及對應的資料線(以資料線DL1為範例)電性連接。具體來說,第一閘極G1與掃描線SL1電性連接。第一通道層CH1位於第一閘極G1的上方。第一源極S1以及第一汲極D1位於第一通道層CH1的上方,且第一源極S1與資料線DL1電性連接。在本實施例中,第一主動元件T1是以底部閘極型薄膜電晶體為例示,但本發明不限於此。在其他實施例中,第一主動元件T1亦可以是頂部閘極型薄膜電晶體,即第一通道層CH1位於第一閘極G1的下方。此外,第一畫素電極PE1藉由第一接觸窗C1與第一主動元件T1的第一汲極D1電性連接。第一閘極G1、第一源極S1以及第一汲極D1例如是金屬材料,但不以此為限。另一方面,第一通道CH1的材質可選擇為非晶矽、多晶矽或是氧化物半導體材料(例如氧化銦鎵鋅(Indium-Gallium-Zinc Oxide,IGZO)、氧化鋅(ZnO)、氧化錫(SnO)、氧化銦鋅(Indium-Zinc Oxide,IZO)、氧化鎵鋅(Gallium-Zinc Oxide,GZO)、氧化鋅錫(Zinc-Tin Oxide,ZTO)或氧化銦錫(Indium-Tin Oxide,ITO)),但本發明不限於此。除此之外,畫素結構P更可以包括連接至共用電壓(Vcom)的共用電極線(未繪示)。共用電極線與第一畫素電極PE1重疊,以形成儲存電容。
第一畫素電極PE1具有第一主體部700以及與第一主體部700連接的多個第一條狀部702。第一條狀部702是由第一主體部700往四個方向延伸。換言之,第一條狀部702是由第一主體部700往四周延伸至第一畫素電極PE1的邊緣處,以形成魚骨狀圖案並定義出四個配向區域(domain region)。另一方面,相鄰的兩個第一條狀部702之間定義出第一狹縫704。
圖4是圖3的畫素結構P中的部份區域A的放大上視示意圖。請參照圖4,第一條狀部702具有一寬度L,且第一狹縫704具有一寬度S。除此之外,兩相鄰的第一條狀部702之間具有一間距p。在本實施例中,間距p是定義為兩相鄰的第一條狀部702的中心點之間的距離。換言之,間距p會等於第一條狀部702的寬度L以及第一狹縫704的寬度S的總和。具體來說,第一條狀部702的寬度L介於2μm至5μ之間,且第一狹縫704的寬度S介於1.5μm至5μm之間。由於間距p為第一條狀部702的寬度L以及第一狹縫704的寬度S的總和,故間距p會介於3.5μm至10μm之間。值得注意的是,間距p較佳的範圍為2.9μm至5.9μm之間。除此之外,本發明的液晶顯示面板10符合下述式(1):
舉例來說,若k11與k33的比值約為0.76,且液晶層600的厚度d約為3μm,則由上述式(1)推導出,間距p(亦即第一條狀部702的寬度L加上第一狹縫704的寬度S)必需要在2.61至
5.23μm之間。
值得注意的是,在本發明中,液晶顯示面板10較佳為符合下述式(2):
換言之,在上述式(2)的情況下,液晶層600中的液晶分子的擴張(Splay)以及彎曲(Bend)能夠得到平衡,進而在被驅動時,提供較佳的排列方式。因此,液晶顯示面板10的透光率能夠有所提升。
圖5是習知的液晶顯示面板以及本發明一實施例的液晶顯示面板之穿透率-電壓曲線圖。請參照圖5,在相同的電壓下,當k11以及k33的比值k11/k33為1.2(大於1)時,相較於比值為1的穿透率會有所下降。另一方面,當k11以及k33的比值k11/k33約為0.86(小於1)時,相較於比值為1的穿透率則會有顯著的提升。因此,可以得知當k11以及k33的比值k11/k33小於1時,能提供較佳的穿透率。
圖6是本發明圖3的實施例的液晶顯示面板10在不同k11/k33比值下其穿透率對條狀部702間距p的變化之柱狀圖。具體來說,圖6的數據是藉由對圖3的實施例的液晶顯示面板10中的第一畫素電極PE1施加7.5伏特的電壓,以量測液晶顯示面板10的穿透率。對應圖6的具體數據如表1所示。
請同時參照圖6以及表1,當k11以及k33之間的比值為0.87時,相較於比值為0.95時具有較佳的穿透率。另一方面,當第一條狀部702的寬度L介於2μm至3μm之間,且第一狹縫704的寬度S介於2μm至3μm之間時,0.76和0.87的比值相較於0.95的比值能更進一步提升穿透率到40%左右的水準。然而,當k11/k33為0.95時,若將寬度L以及寬度S由2.5μm減少至2μm,則液晶顯示面板10的穿透率會驟降至38.21%。上述情況並未見於當k11/k33為0.87以及0.76時。換言之,當k11/k33小於0.87且搭配小於3μm的L和S,而L和S也大於0時,能更進一步提供穿透率的穩定性。
在本實施例中,液晶顯示面板10藉由選擇具有0<k11/k33<1特性以及厚度d的液晶層600,並搭配滿足式(1)或式(2)
的第一條狀部702之間的間距p,能夠有效地提高液晶顯示面板的光穿透率。
圖7是根據本發明另一實施例的畫素結構P的放大上視示意圖。本實施例的畫素結構P與圖3的實施例相似,因此相同的元件以相同的符號表示,且不在重複說明。本實施例與圖3的實施例的不同之處在於本實施例的畫素結構P更包括第二主動元件T2以及第二畫素電極PE2。第二主動元件T2包括第二閘極G2、第二通道層CH2、第二源極S2以及第二汲極D2。請參照圖7,在本實施例中,第二主動元件T2與對應的掃描線SL1及對應的資料線DL2電性連接。具體來說,第二閘極G2與掃描線SL1電性連接。第二通道層CH2位於第二閘極G2的上方。第二源極S2以及第二汲極D2位於第二通道層CH2的上方,且第二源極S2與資料線DL2電性連接。換言之,在本實施例中,第一主動元件T1以及第二主動元件T2連接至同一條掃描線SL1,故第一閘極G1以及第二閘極G2亦電性連接。第二主動元件T2中各元件的材質可以與第一主動元件T1中各元件的材質相同或不同,本發明並不特別作限制。此外,第二畫素電極PE2藉由第二接觸窗C2與第二主動元件T2的第二汲極D2電性連接。另一方面,畫素結構P更可以包括連接至共用電壓(Vcom)的共用電極線(未繪示)。共用電極線與第一畫素電極PE1以及第二畫素電極PE2重疊,以形成儲存電容。
類似於第一畫素電極PE1,第二畫素電極PE2亦具有第
二主體部710以及與第二主體部710連接的多個第二條狀部706。第二條狀部706是由第二主體部710往四個方向延伸。換言之,第二條狀部706是由第二主體部710往四周延伸至第二畫素電極PE2的邊緣處,以形成魚骨狀圖案並定義出四個配向區域。因此,在本實施例的畫素結構P中,第一畫素電極PE1以及第二畫素電極PE2共定義出八個配向區域。除此之外,相鄰的兩個第二條狀部706之間定義出第二狹縫708。
圖8是圖7的畫素結構中的部份區域B的放大上視示意圖。請參照圖8,類似於圖4的實施例,第二條狀部706亦具有寬度L,且第二狹縫708亦具有寬度S。除此之外,兩相鄰的第二條狀部706之間具有間距p,且間距p會等於第二條狀部706的寬度L以及第二狹縫708的寬度S的總和。類似於圖4的實施例,第二條狀部706的寬度L介於2μm至5μ之間,且第二狹縫708的寬度S介於1.5μm至5μm之間。由於間距p為第二條狀部706的寬度L以及第二狹縫708的寬度S的總和,故間距p會介於3.5μm至10μm之間,且間距p較佳的範圍為2.9μm至5.9μm之間。除此之外,本實施例的液晶顯示面板10亦符合式(1):
圖9是本發明圖7的實施例的液晶顯示面板10在不同的k11/k33比值下其穿透率柱狀圖對條狀部702、706間距p的變化之柱狀圖。具體來說,圖9的數據是藉由對圖7的實施例的液晶顯
示面板10中的第一畫素電極PE1施加約7.5伏特的電壓並對第二畫素電極PE2施加約5.15伏特的電壓,以量測液晶顯示面板10的穿透率。對應圖9的具體數據如表2所示。
請同時參照圖9以及表2,當k11以及k33之間的比值為0.87時,相較於比值為0.95時,穿透率有顯著的提升。另一方面,當第二條狀部706的寬度L介於2μm至2.5μm之間,且第二狹縫708的寬度S介於2μm至2.5μm之間時,0.76和0.87的比值相較於0.95的比值都能顯著提升穿透率。除此之外,當k11/k33約為0.95時,若將寬度L以及寬度S由約2.5μm減少至約2μm,則液晶顯示面板10的穿透率會驟降。這樣的情況在當k11/k33約為0.87以及0.76時並不明顯。換言之,當k11/k33小於0.87並搭配小於3μm的L和S,且L和S大於0時,能更進一步提供穿透率的穩定性。
在本實施例中,液晶顯示面板10藉由選擇具有0<k11/k33<1特性以及厚度d的液晶層600,並搭配滿足式(1)或式(2)的第二條狀部706之間的間距p,能夠有效地提高液晶顯示面板的光穿透率。
綜上所述,本發明的液晶顯示面板藉由選擇具有0<k11/k33<1特性以及特定厚度的液晶材料,並搭配滿足式(1)的特定畫素結構的設計,能夠有效地提高液晶顯示面板的光穿透率。
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。
P‧‧‧畫素結構
SL1、SL2‧‧‧掃描線
DL1、DL2‧‧‧資料線
T1‧‧‧第一主動元件
G1‧‧‧第一閘極
CH1‧‧‧第一通道層
S1‧‧‧第一源極
D1‧‧‧第一汲極
C1‧‧‧第一接觸窗
PE1‧‧‧第一畫素電極
700‧‧‧第一主體部
702‧‧‧第一條狀部
704‧‧‧第一狹縫
A‧‧‧區域
Claims (10)
- 一種液晶顯示面板,包括:一第一基板;多條掃描線以及多條資料線,位於該第一基板上;多個畫素結構,位於該第一基板上,各該畫素結構電性連接於所對應的該多條掃描線其中一條和該多條資料線的其中一條,其中每一畫素結構包括:一第一主動元件,電性連接至該些掃描線其中之一與該些資料線其中之一;以及一第一畫素電極,電性連接至該第一主動元件,該第一畫素電極具有多個第一條狀部,且相鄰的該些第一條狀部之間定義出一第一狹縫,其中該些第一條狀部具有一寬度L,該些第一狹縫具有一寬度S,該些第一條狀部之間具有一間距p,且p=L+S;一第二基板,位於該第一基板的對向;一對向電極層,配置於該第二基板上,且位於該第一基板與該第二基板之間;以及一液晶層,配置於該第一基板與該第二基板之間,該液晶層在該第一基板與該第二基板之間具有一厚度d,該液晶層具有一擴張彈性係數k11以及一彎曲彈性係數k33,且0<k11/k33<0.87,其中該液晶顯示面板符合下述式(1):
- 如申請專利範圍第1項所述的液晶顯示面板,更包括:一第一配向層,配置於該畫素結構以及該液晶層之間;以及一第二配向層,配置於該對向電極層以及該液晶層之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該液晶顯示面板符合下述式(2):
- 如申請專利範圍第1項所述的液晶顯示面板,其中該些第一條狀部的該寬度L介於2μm至5μm之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該些第一狹縫的該寬度S介於1.5μm至5μm之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該些第一條狀部之間的該些間距p介於3.5μm至10μm之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該液晶層的該厚度d介於2.7μm至3.5μm之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該液晶層的該展曲彈性常數k11介於1.1×10-11牛頓至2.0×10-11牛頓之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中該液晶層的該彎曲彈性常數k33介於1.1×10-11牛頓至2.0×10-11牛頓之間。
- 如申請專利範圍第1項所述的液晶顯示面板,其中每一畫素結構更包括:一第二主動元件,電性連接至該些掃描線其中之一與該些資料線其中之一;以及一第二畫素電極,電性連接至該第二主動元件,該第二畫素電極具有多個第二條狀部,且相鄰的該些第二條狀部之間定義出一第二狹縫,其中該些第二條狀部具有該寬度L,該些第二狹縫具有該寬度S,該些第二條狀部之間具有該間距p。
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US10529674B2 (en) * | 2016-11-28 | 2020-01-07 | Northwestern University | System and method for stripline electrodes for thin-film characterization |
TWI654471B (zh) * | 2018-05-31 | 2019-03-21 | 友達光電股份有限公司 | 液晶顯示面板 |
TWI708106B (zh) * | 2019-03-06 | 2020-10-21 | 友達光電股份有限公司 | 液晶顯示面板 |
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