CN105929612A - 一种液晶显示屏行引线的ito布线方法 - Google Patents

一种液晶显示屏行引线的ito布线方法 Download PDF

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CN105929612A
CN105929612A CN201610419127.6A CN201610419127A CN105929612A CN 105929612 A CN105929612 A CN 105929612A CN 201610419127 A CN201610419127 A CN 201610419127A CN 105929612 A CN105929612 A CN 105929612A
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liquid crystal
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胡祖军
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SUZHOU ZHONGXIAN ELECTRONIC SCIENCE & TECHNOLOGY Co Ltd
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SUZHOU ZHONGXIAN ELECTRONIC SCIENCE & TECHNOLOGY Co 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
    • 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
    • G02F1/1345Conductors connecting electrodes to cell terminals
    • 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
    • G02F1/1345Conductors connecting electrodes to cell terminals
    • G02F1/13452Conductors connecting driver circuitry and terminals of panels
    • 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
    • G02F1/1347Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells

Abstract

本发明公开了一种液晶显示屏行引线的ITO布线方法,其特点是,最短的行引线线宽到最长的行引线线宽采取从小到大递进式的方法进行布线,方法具体步骤为:排好最短的一根行引线,确定线长、线宽,计算出方块电阻,按液晶显示屏驱动芯片最长的一根行引线的电阻值与最短的一根行引线电阻值之比不超过2倍的要求排好最长的一根行引线,确定线宽、线长;根据液晶显示屏产品的不同要求选择线数;根据最长的一根行引线线宽、最短的一根行引线线宽和线数确定步径。本发明的有益效果是,通过液晶显示屏行引线的线宽递进布线,降低了ITO的走线电阻,从而增强了芯片的驱动能力,使功耗和工作电压匹配一致,减少了屏显示不良即行显示深浅的产生。

Description

一种液晶显示屏行引线的ITO布线方法
技术领域
本发明涉及一种液晶显示屏行引线的布线方法,特别涉及STN超扭曲型液晶显示屏行引线的ITO布线方法,属于液晶显示器技术领域。
背景技术
众所周知,对于STN超扭曲型液晶显示屏而言,无论是COG(芯片在玻璃上),还是TCP(胶片携带芯片)、COF(芯片在薄膜上),在单芯片驱动时,对ITO(即铟锡氧化物)布线有一定的要求,尤其是尺寸偏大的显示屏对COM(行)部份的ITO布线要求更为严谨。芯片的管脚之间以及管脚和内部电路的连接主要靠玻璃上的ITO,,而ITO相比金属线具有很大的电阻。液晶显示屏ITO的走线电阻与其长度成正比,与其宽度成反比,这在术语上称为方块电阻数。因此,ITO走线的电阻就是走线的方块电阻数与玻璃方块电阻数的乘积。一根COM的电阻值就是这根线的所有线段的方块电阻(线长/线宽)之和与玻璃方块电阻数的乘积。
目前STN中的中大尺寸液晶显示屏,由于大容量显示时,行、列像素电极很细,又存在较长的行引线ITO走线电阻,所以使本来电阻率就较大的电极电阻就更大了。如果电阻比值不合理,必然导致工作电压的跌落,从而芯片推动能力不足,降低了显示质量。当液晶显示屏较大或行数大于64时尤为明显,甚至会造成乱显示、满载显示淡、显示不均匀等现象。
发明内容
本发明的目的是为了提高液晶显示屏驱动芯片的推动能力,提供一种能够减小行引线ITO走线电阻的布线方法。
本发明涉及到ITO的布线。行引线布线时,要求最长一根的电阻值与最短一根电阻值不超过2倍。由于一根行引线地电阻值就是这根线的所有线段的方块电阻(线长/线宽)之和与玻璃方块电阻数的乘积,其中玻璃的方块电阻是不变的,针对每根行引线的电阻,变化因素只有线长和线宽,而ITO的走线电阻与其长度成正比,与其宽度成反比,所以合理的调配线宽与线长。一般来说,线长也基本是无太大的变化,所以只有通过线宽的调节,来解决减小走线电阻这一问题。
本发明的技术方案是:一种液晶显示屏行引线的ITO布线方法,其特点是,最短的行引线线宽到最长的行引线线宽采取从小到大递进式的方法进行布线,方法具体步骤为:
1、排好最短的一根行引线,确定线长、线宽,计算出方块电阻,按液晶显示屏驱动芯片最长的一根行引线的电阻值与最短的一根行引线电阻值之比不超过2倍的要求排好最长的一根行引线,确定线宽、线长;
2、根据液晶显示屏产品的不同要求选择线数;
3、根据最长的一根行引线线宽、最短的一根行引线线宽和线数确定步径。
本发明的有益效果是,通过液晶显示屏行引线的线宽递进布线,降低了ITO的走线电阻,从而增强了芯片的驱动能力,使功耗和工作电压匹配一致,减少了屏显示不良的产生。
附图说明
图1为本发明的布线图。
图中区域A为各行引线对应ITO布线。
具体实施方式
下面结合附图和具体实施例对本发明作详细说明。
本发明包括玻璃上的ITO布线。根据芯片的驱动及屏的逻辑功能,进行布线,相应地分配线宽,各行引线的ITO布线电阻比值合理。如图1所示,表示了逐步递进的6种线宽。
实施例1
芯片驱动器使用UC1611芯片,在产品走线区域大小许可的范围内,应尽量降低每根行引线的方块电阻。一般的芯片要求最长一根行引线的电阻值与最短一根行引线电阻值之比不超过2倍。本芯片供应商要求最长一根行引线的电阻值与最短一根行引线电阻值的比值为1.3倍。
第一次试验时,虽然也达到了客户对电阻值的要求,但由于没有采取递增式的线宽,造成中间行明显的显示深浅。
第二次试验时,先排好最短引线最小的线宽为40μm,线长为113.66mm,算出方块电阻为898.46,根据最长一根行引线的电阻值与最短一根行引线电阻值的比值为1.3倍的要求,算出最大的线宽为79.5μm,根据液晶显示屏要求的线数为80,则步径为:(79.5μm-40μm)÷79=0.5μm,每根线宽度以0.5μm为步径递增,大大降低了行引线的ITO布线电阻。为使电阻更小,采取递进步径也是非常合理的。从而减小电阻方块数,也就减小了总电阻,使UC1611芯片能够推动97.75mm*82.7mm的大屏。
实施例2
在58.9mm*42.4mm的中等尺寸屏上,原行的最长线和最短线电阻值比达到2.35倍,不符合设计要求,后在实际布线时采用递增方式。先排好最短引线最小的线宽为50μm,线长为72.82mm,算出方块电阻为543.57,根据最长一根行引线的电阻值与最短一根行引线电阻值的比值为2倍以内的要求,初定算出最大的线宽为113μm。根据液晶显示屏要求线数64,确定步径为1μm,算出最长引线和最短引线电阻值比为1.6倍,在2倍以内,实现芯片驱动时,显示无深浅。
在实际使用过程中,此方案切实可行,实验产品验证结果良好,改善了屏显示不均匀的现象。

Claims (1)

1.一种液晶显示屏行引线的ITO布线方法,其特征在于,最短的行引线线宽到最长的行引线线宽采取从小到大递进式的方法进行布线,方法的具体步骤为:先排好最短的一根行引线,确定线长、线宽,计算出方块电阻,按液晶显示屏驱动芯片最长的一根行引线的电阻值与最短的一根行引线电阻值之比不超过2倍的要求排好最长的一根行引线,确定线宽、线长;根据液晶显示屏产品的不同要求选择线数;根据最长的一根行引线线宽、最短的一根行引线线宽和线数确定步径。
CN201610419127.6A 2016-06-15 2016-06-15 一种液晶显示屏行引线的ito布线方法 Withdrawn CN105929612A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2788224Y (zh) * 2004-07-27 2006-06-14 比亚迪股份有限公司 一种显示屏驱动模块的电路布线结构及液晶显示屏
CN101071206A (zh) * 2006-05-09 2007-11-14 上海广电液晶显示器有限公司 一种液晶显示屏行引线的ito布线方法
CN101359105A (zh) * 2007-08-01 2009-02-04 比亚迪股份有限公司 对液晶显示屏玻璃基板的导电引线进行电性能检测的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2788224Y (zh) * 2004-07-27 2006-06-14 比亚迪股份有限公司 一种显示屏驱动模块的电路布线结构及液晶显示屏
CN101071206A (zh) * 2006-05-09 2007-11-14 上海广电液晶显示器有限公司 一种液晶显示屏行引线的ito布线方法
CN101359105A (zh) * 2007-08-01 2009-02-04 比亚迪股份有限公司 对液晶显示屏玻璃基板的导电引线进行电性能检测的方法

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Application publication date: 20160907