CN114063359A - Tn型号tft-lcd得到bm的线宽范围的方法 - Google Patents

Tn型号tft-lcd得到bm的线宽范围的方法 Download PDF

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CN114063359A
CN114063359A CN202110961825.XA CN202110961825A CN114063359A CN 114063359 A CN114063359 A CN 114063359A CN 202110961825 A CN202110961825 A CN 202110961825A CN 114063359 A CN114063359 A CN 114063359A
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赵春光
徐阳
李伟界
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Truly Huizhou Smart Display Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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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    • G02F1/13Devices 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
    • G02F1/137Devices 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
    • G02F1/139Devices 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
    • G02F1/1396Devices 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 liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133302Rigid substrates, e.g. inorganic substrates
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133512Light shielding layers, e.g. black matrix

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Abstract

本发明涉及一种TN型号TFT‑LCD得到BM的线宽范围的方法,包括如下步骤:步骤一,确定Array基板和CF基板上各膜层的厚度以及折射率;步骤二,设定人眼观察的最大视角θ;步骤三,将透射光由CF基板的玻璃基材射入空气层的出射角设为θ1,将透射光由G膜层射入CF基板的玻璃基材的入射角设为θ2,满足Nglass×sinθ1=NG×sinθ2,并且透射光在G膜层移动路径的水平方向移动距离d1=TG×tanθ2;将透射光由OC膜层射入G膜层的入射角设为θ3,满足NOC×sinθ3=NG×sinθ2,透射光到达G膜层前的移动路径的水平方向移动距离d2=(Tlc+TOC+Tx)×tanθ3;步骤四,将θ1=θ,得到(d1+d2)的数值,Array基板侧的S/D线两侧的G层遮光线的宽度为d3,则BM的线宽不小于(2d1+2d2+d3)的数值。

Description

TN型号TFT-LCD得到BM的线宽范围的方法
技术领域
本发明涉及液晶显示器领域,特别是涉及一种TN型号TFT-LCD 得到BM的线宽范围的方法。
背景技术
(Thin Film Transistor-Liquid Crystal Display)包括Array基板、CF基板以及位于两块基板之间的液晶层,TFT-LCD可分为TN、IPS、VA三种显示模式。Array基板上和CF基板上均设置有取向层,这种取向层一般通过摩擦配向或者光配向方式获得一定角度的预倾角,所以靠近Array基板和CF基板的液晶分别呈现对应取向层的预倾角。
型TFT-LCD是一种常白TFT-LCD显示模式,在这种显示模式中,下方的Array基板的取向层预倾角和上方的CF基板的取向层预倾角相互垂直,而中间层的液晶分子由于分子间相互作用而呈现螺旋形上升实现90°扭曲。TN型TFT-LCD在加电情况下中间层液晶分子由于受到电场力的作用呈现垂直排列,由于CF基板侧偏光片和Array基板侧偏光片相互垂直,所以加电情况下TN型TFT-LCD呈现黑态。
型TFT-LCD的Array基板侧一般包括G层遮光线、S/D线,这些区域由CF基板侧的BM(遮光膜)阻挡,由于贴合精度的误差以及BM线宽大小的影响,可能会导致背光板产生的光源从Array基板侧的G层遮光线与S/D线之间的间隙射入,并且在非电场力作用下的液晶分子的散射作用下出现漏光现象,从而影响产品的L0(黑态)亮度以及对比度。TN型TFT-LCD的L0(黑态)下的漏光会影响产品的品质从而造成产品降级,严重的会造成产品报废。
发明内容
针对现有技术中存在的技术问题,本发明提供一种TN型号TFT-LCD 得到BM的线宽范围的方法,该方法利用现有Array基板和CF基板上各膜层的参数(包括折射率以及厚度),通过建立光学模型模拟背光板光源产生的透射光在TN型号TFT-LCD内的传播方向及路径,从而计算出和现有的生产TN型号TFT-LCD的设备的精度匹配的BM线宽范围值,在TN型号TFT-LCD的设计阶段减少产品漏光的可能,提高TN型号TFT-LCD的对比度以及降低不良率。
本发明中记载的TN型号TFT-LCD包括背光板、Array基板、CF基板以及位于两块基板之间的液晶层。本发明中记载的角度均是与竖直方向所形成的夹角。
为实现上述目的,本发明采用如下技术方案:一种TN型号TFT-LCD 得到BM的线宽范围的方法,该方法具体包括如下步骤:
步骤一,确定Array基板和CF基板上各膜层的厚度以及折射率,包括:
空气层的折射率NAir
基板和Array基板的玻璃基材的折射率Nglass
液晶层的折射率Nlc,液晶层的厚度Tlc
基板侧的G膜层的折射率NG,G膜层的厚度TG
基板侧的OC膜层的折射率NOC,OC膜层的的厚度TOC
基板侧的无机膜层的厚度Tx
步骤二,背光板光源产生的透射光的路径为:透射光依次经过Array基板、液晶层、CF基板和空气层后射入人眼中,设定人眼观察的最大视角为θ,即透射光射入空气层后与竖直方向成θ的夹角,透射光经过Array基板的玻璃基材后由Array基板侧的G层遮光线与S/D线之间的间隙射入液晶层。
步骤三,透射光经过CF基板具体为依次经过OC膜层、G膜层、CF基板的玻璃基材,将透射光由CF基板的玻璃基材射入空气层的出射角设为θ1,将透射光由G膜层射入CF基板的玻璃基材的入射角设为θ2,满足Nglass×sinθ1=NG×sinθ2,并且透射光在G膜层移动路径的水平方向移动距离d1=TG×tanθ2;将透射光由OC膜层射入G膜层的入射角设为θ3,满足NOC×sinθ3=NG×sinθ2,因此透射光到达G膜层前的移动路径的水平方向移动距离d2= (Tlc+ TOC+Tx)×tanθ3,从而d1+ d2= TG×tanθ2+(Tlc+ TOC+Tx) ×tanθ3
步骤四,将θ1=θ,得到(d1+ d2)的数值,设Array基板侧的S/D线两侧的G层遮光线的宽度为d3,则BM的线宽不小于(d1+ d2)×2+ d3
一般情况下,空气层的折射率为NAir为1。
本发明提供一种TN型号TFT-LCD 得到BM的线宽范围的方法,该方法相比于现有技术方案存在的有益效果为:
在设计TN型号TFT-LCD时,Array基板和CF基板上各膜层的厚度以及折射率可以确定下来,即步骤一中记载的各参数是可以在设计阶段确定下来,而人眼观察角度θ可根据TN型号TFT-LCD的使用环境来确定,因此本发明提供的方法可以在设计TN型号TFT-LCD阶段得到BM线宽范围值,在产品设计阶段减少TN型TFT-LCD产品漏光的可能,从而在后续的生产阶段提高TN型号TFT-LCD的对比度以及降低不良率。
该方法不使用EDA软件,无需生产出实际快检Panel,降低了生产成本。
下面结合具体实施例进行说明。
附图说明
附图对本发明作进一步说明,但附图中的实施例不构成对本发明的任何限制。
图1为本发明一实施例提供的TN型号TFT-LCD结构示意图;
图2为本发明一实施例中人眼观察TN型号TFT-LCD的视角范围示意图。
其中,附图标记为:1. TFT-LCD;2.Array基板;3.液晶层;4.CF基板。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
如图1所示,本实施例提供的一种TN型号TFT-LCD 1包括Array基板2、CF基板4以及位于两块基板之间的液晶层3,Array基板2侧的无机膜层为SiNx无机膜层,Array基板2侧还包括G层遮光线、S/D线,两个G层遮光线分别设置在S/D线的两侧,S/D线两侧的G层遮光线的宽度为d3。CF基板4侧包括OC膜层、G膜层、BM。理想情况下,BM在Array基板2侧的投影会覆盖两个G层遮光线,但由于贴合精度的误差以及BM线宽大小的影响,此时可能BM不能完全覆盖两个G层遮光线导致漏光。
如图2所示,人眼观察的最大视角为θ,本实施例中,θ=45°,即人眼以45°的视角观察加电情况下的TFT-LCD 1,若未发现有漏光,则人眼以小于45°的视角观察加电情况下的TFT-LCD 1时必定不会发现有漏光,则该TFT-LCD 1不存在漏光现象。
本实施例中,背光板为TFT-LCD 1的光源,背光板位于Array基板2远离CF基板4的一端,背光板光源产生的透射光的传播遵循:光从一种介质(折射率为n1,入射角为θa)射入另外一种介质(折射率为n2,出射角为θb)中时满足sinθa× n1 = sinθb×n2。本实施例中,背光板光源产生的透射光的传播路径如图1中的实线所示。
本实施例提供一种TN型号TFT-LCD 得到BM的线宽范围的方法,该方法具体包括如下步骤:
步骤一,确定Array基板2和CF基板4上各膜层的厚度以及折射率,包括:
空气层的折射率NAir
基板和Array基板的玻璃基材的折射率Nglass
液晶层的折射率Nlc,液晶层的厚度Tlc
基板侧的G膜层的折射率NG,G膜层的厚度TG
基板侧的OC膜层的折射率NOC,OC膜层的的厚度TOC
基板侧的SiNx无机膜层的厚度设Tx
步骤二,如图2所示,背光板光源产生的透射光的路径为:透射光依次经过Array基板2、液晶层3、CF基板4和空气层后射入人眼中,设定人眼观察的最大视角θ=45°,透射光经过Array基板2的玻璃基材后由Array基板2侧的G层遮光线与S/D线之间的间隙射入液晶层3,因此不需要考虑SiNx无机膜层的折射率。
步骤三,透射光经过CF基板4具体为依次经过OC膜层、G膜层、CF基板的玻璃基材,将透射光由CF基板4的玻璃基材射入空气层的出射角设为θ1,将透射光由G膜层射入CF基板4的玻璃基材的入射角设为θ2,满足Nglass×sinθ1=NG×sinθ2,并且透射光在G膜层移动路径的水平方向移动距离d1=TG×tanθ2;将透射光由OC膜层射入G膜层的入射角设为θ3,满足NOC×sinθ3=NG×sinθ2,因此透射光到达G膜层前的移动路径的水平方向移动距离d2= (Tlc+ TOC+Tx) ×tanθ3,从而d1+ d2= TG×tanθ2+(Tlc+ TOC+Tx) ×tanθ3
步骤四,将θ1=θ=45°,得到(d1+ d2)的数值,设Array基板侧的S/D线两侧的G层遮光线的宽度为d3,则BM的线宽不小于(d1+ d2)×2+ d3
当BM线宽大小满足上述条件时,可以减少TN型TFT-LCD产品漏光的可能。为了更进一步减少TN型TFT-LCD产品漏光的可能,若现有的生产TN型号TFT-LCD的设备在贴合BM在水平方向的误差数值为±d4,则BM的线宽不小于(d1+ d2)×2+ d3+ d4
本发明提供的一种TN型号TFT-LCD 得到BM的线宽范围的方法也适用于其它型号的需要使用BM遮挡边缘的TFT-LCD产品。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (2)

1.一种TN型号TFT-LCD得到BM的线宽范围的方法,所述TN型号TFT-LCD包括背光板、Array基板、CF基板和液晶层,所述背光板产生透射光,其特征在于,所述方法包括如下步骤:
步骤一,确定所述Array基板和所述CF基板上各膜层的厚度以及折射率,包括:
空气层的折射率NAir
所述CF基板的玻璃基材的折射率Nglass
所述液晶层的折射率Nlc,所述液晶层的厚度Tlc
所述CF基板侧的G膜层的折射率NG,G膜层的厚度TG
所述CF基板侧的OC膜层的折射率NOC,OC膜层的的厚度TOC
所述Array基板侧的无机膜层的厚度Tx
步骤二,设定人眼观察的最大视角θ;
步骤三,将所述透射光由所述CF基板的玻璃基材射入所述空气层的出射角设为θ1,将所述透射光由所述G膜层射入所述CF基板的玻璃基材的入射角设为θ2,满足Nglass×sinθ1=NG×sinθ2,并且所述透射光在所述G膜层移动路径的水平方向移动距离d1=TG×tanθ2;将所述透射光由所述OC膜层射入所述G膜层的入射角设为θ3,满足NOC×sinθ3=NG×sinθ2,所述透射光到达所述G膜层前的移动路径的水平方向移动距离d2=(Tlc+TOC+Tx)×tanθ3,d1+d2=TG×tanθ2+(Tlc+TOC+Tx)×tanθ3
步骤四,将θ1=θ,得到(d1+d2)的数值,所述Array基板侧的S/D线两侧的G层遮光线的宽度为d3,则BM的线宽不小于(2d1+2d2+d3)的数值。
2.根据权利要求1所述的方法,其特征在于:所述人眼观察的最大视角θ为45°。
CN202110961825.XA 2021-08-20 2021-08-20 Tn型号tft-lcd得到bm的线宽范围的方法 Pending CN114063359A (zh)

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JP2004163979A (ja) * 2004-02-04 2004-06-10 Nec Lcd Technologies Ltd アクティブマトリクス型液晶表示装置
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CN101369076A (zh) * 2007-08-17 2009-02-18 北京京东方光电科技有限公司 液晶显示面板
JP2011145378A (ja) * 2010-01-13 2011-07-28 Toppan Printing Co Ltd フォトマスク、カラーフィルタ基板、画素電極基板、液晶表示装置、カラーフィルタ基板の製造方法及び画素電極基板の製造方法
CN105974707A (zh) * 2016-08-03 2016-09-28 苏州众显电子科技有限公司 改善液晶显示器像素边缘漏光的方法
CN211698582U (zh) * 2020-01-16 2020-10-16 信利(仁寿)高端显示科技有限公司 新型掩模板、及彩色滤光片的制备系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004163979A (ja) * 2004-02-04 2004-06-10 Nec Lcd Technologies Ltd アクティブマトリクス型液晶表示装置
US20070242193A1 (en) * 2006-04-14 2007-10-18 Lg.Philips Lcd Co., Ltd. Color filter substrate for liquid crystal display, and manufacturing method thereof
CN101369076A (zh) * 2007-08-17 2009-02-18 北京京东方光电科技有限公司 液晶显示面板
JP2011145378A (ja) * 2010-01-13 2011-07-28 Toppan Printing Co Ltd フォトマスク、カラーフィルタ基板、画素電極基板、液晶表示装置、カラーフィルタ基板の製造方法及び画素電極基板の製造方法
CN105974707A (zh) * 2016-08-03 2016-09-28 苏州众显电子科技有限公司 改善液晶显示器像素边缘漏光的方法
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