WO2016011766A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2016011766A1
WO2016011766A1 PCT/CN2014/093529 CN2014093529W WO2016011766A1 WO 2016011766 A1 WO2016011766 A1 WO 2016011766A1 CN 2014093529 W CN2014093529 W CN 2014093529W WO 2016011766 A1 WO2016011766 A1 WO 2016011766A1
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WO
WIPO (PCT)
Prior art keywords
leads
sector
resistance
display device
sets
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PCT/CN2014/093529
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English (en)
French (fr)
Inventor
陈彩琴
连校许
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/416,641 priority Critical patent/US20160018711A1/en
Publication of WO2016011766A1 publication Critical patent/WO2016011766A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/136—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

Definitions

  • the present invention relates to the field of display technology, and in particular to a display device.
  • each pixel is controlled by a grid line and a data line which are criss-crossed on the substrate to realize display of an image.
  • the gate driving circuit and the data circuit are often fabricated on the same printed circuit board (PCB), and then the PCB is used for the transmission gate drive by using the Wire On Array (WOA).
  • WOA Wire On Array
  • the liquid crystal display usually includes at least two COFs for transmitting gate drive signals, and the adjacent two COFs are also connected by WOA. Each COF is connected to a set of fanouts on the substrate and connected to the respective gate lines by sector leads.
  • the resistance value of the gate line connected to the latter COF is larger than the resistance value of the gate line connected to the previous COF, so that the waveform of the gate driving signal on the two gate lines is obtained.
  • the difference in waveform of the gate drive signal at the junction of the two COFs that is, the last gate line of the previous COF connection and the first gate line connected to the latter COF, is particularly noticeable.
  • the thin film transistor (TFT) characteristic curve is shifted, the leakage current is increased or the charging becomes insufficient, and the difference of the waveform is more obvious, resulting in the liquid crystal display in the COF.
  • Linear bright spots or dark spots (mura) appear at the junction, which is the horizontal block defect (Hblock), which affects the display effect of the liquid crystal display.
  • the present invention provides a display device comprising a substrate and at least two flip chip COFs for transmitting gate driving signals, the substrate being formed with at least two sets of sector leads, each of the COFs and each set of the sector leads One-to-one correspondence is connected, and adjacent COFs are connected by a substrate trace WOA. Among adjacent two sets of sector leads, the resistance of the previous set of sector leads is greater than the resistance of the latter set of sector leads.
  • the difference between the resistance values of the adjacent two sets of sector leads is equal to the resistance of the WOA between the two COFs corresponding to the two sets of sector leads.
  • a set of the sector leads includes a plurality of leads, each of the leads connecting a gate line on the substrate;
  • the leads are composed of segments and extensions.
  • the leads only have segments
  • the leads consist of segments and extensions.
  • the resistance of the extension of the lead in the former set of sector leads is greater than the resistance of the extension of the lead in the latter set of sector leads.
  • the difference in resistance between the extensions of the leads in the adjacent two sets of sector leads is equal to the resistance of the WOA between the two COFs corresponding to the two sets of sector leads.
  • the extension is in the shape of a line, a curve or a wavy line.
  • the display device further includes a gate driving circuit, and the first COF is connected to the gate driving circuit through the WOA.
  • the invention brings about the following beneficial effects: in the display device provided by the present invention, in any two sets of adjacent sector-shaped lead wires, the resistance values of the former group of fan-shaped leads are greater than the resistance values of the latter group of fan-shaped leads, and During the transmission of the pole drive signal, the latter set of sector leads will pass one more WOA than the previous set of sector leads. In this way, the sum of the resistance of the latter set of sector leads and the resistance of the WOA can be close to or even equal to the resistance of the previous set of sector leads to eliminate the waveform difference of the gate drive signal, thereby solving the problem.
  • the technical problem of horizontal block defects caused by the resistance of WOA improves the display effect of the display device.
  • FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention.
  • Figure 2 is a partial schematic view of the sector lead portion of Figure 1.
  • a display device provided by an embodiment of the invention includes a substrate, a printed circuit board (PCB), and a plurality of COFs for respectively transmitting gate drive signals and data signals.
  • PCB printed circuit board
  • COFs 11 and 12 for transmitting gate driving signals, and two sets of sector leads 31 and 32 are formed on the substrate 2.
  • Each of the COFs 11 and 12 is connected to the fan-shaped leads 31 and 32 of the respective groups one by one, and the adjacent COFs 11 and 12 are connected by the WOA 42. Further, a gate driving circuit (not shown) is disposed in the PCB 5, and the first COF 11 is connected to the gate driving circuit in the PCB 5 through the WOA 41.
  • the resistance of the former set of sector leads 31 is greater than the resistance of the latter set of sector leads 32.
  • the difference between the resistance values of the adjacent two sets of sector leads 31, 32 is equal to the resistance of the WOA 42 between the two COFs 11, 12 corresponding to the two sets of sector leads 31, 32.
  • the resistance of the previous set of sector leads 31 is greater than the resistance of the latter set of sector leads 32, and during the transmission of the gate drive signal, the latter set of sector leads 32 will be larger than before.
  • the sum of the resistance of the latter set of sector leads 32 and the resistance of the WOA 42 is equal to the resistance of the previous set of sector leads 31 to eliminate the waveform difference of the gate drive signal, thereby solving the resistance due to the WOA 42.
  • the technical problem of horizontal block defects (Hblock) caused by the value improves the display effect of the display device.
  • a set of sector leads 3 includes a plurality of leads 30, each of which connects a gate line 6 on the substrate 2.
  • the resistance values of the respective lead wires 30 are equal, so that the resistance values of the respective gate lines 6 connected to the same set of the sector-shaped lead wires 3 are equal to ensure the waveform of the gate driving signal on each of the gate lines 6. Consistent.
  • the lead 30 is composed of a sector 301 and an extension 302.
  • the resistance of the segments 301 of the leads 30 are equal.
  • the resistance of the extension 302 of the lead 30 in the former set of sector leads 31 is greater than the resistance of the extension 302 of the lead 30 in the latter set of sector leads 32. It is equivalent to adding an extension to the fan-shaped lead wire in the prior art, so as to facilitate the compensation adjustment of the resistance value.
  • the shape of the extension 302 can be in the shape of a line, a curve or a wavy line, so that the length of the extension 302 can be increased in a limited space so that the resistance of the extension 302 is sufficiently large.
  • the leads in the last set of sector leads may also have only segments, without extensions, directly connected to the gate lines by the segments; and in the remaining groups of segments, the leads are still segmented and extended. Segment composition.
  • the segments 301 of the leads 30 located at both ends of the sector lead 3 are obliquely disposed at an angle, and the closer to the middle of the sector lead 3, the angle of the sector 301 of the lead 30 is increasingly The smaller.
  • the segments 301 of the leads 30 located in the middle of the sector leads 3 may also be arranged in a zigzag shape, a curved shape or a wavy line shape, so that the lengths of the segments 301 are equal, thereby having Equal resistance.
  • the difference between the resistances of the extensions 302 of the leads 30 in the adjacent two sets of sector leads 31, 32 is equal to the WOA 42 between the two COFs 11, 12 corresponding to the two sets of sector leads 31, 32. Resistance.
  • the resistance value of the WOA 41 can be expressed as R1; the resistance value of the WOA 42 is represented as R2; and the sector 301 of the lead line 30 in the former group of the sector lead 31
  • the resistance is equal to the resistance of the segment 301 of the lead 30 in the latter set of sector leads 32, both of which are R3; the resistance of the extension 302 of the lead 30 in the former set of sector leads 31 is R2', and R2' and WOA42
  • the resistance R2 is equal; the resistance of the extension 302 of the lead 30 in the latter set of sector leads 32 approaches zero.
  • the display device solves the technical problem of horizontal block defects (Hblock) due to the resistance of the WOA42, and improves the display effect of the display device.
  • Hblock horizontal block defects
  • the capacitive reactance of the WOA42 also slightly interferes with the gate driving signal, so the former group of sectors
  • the resistance of the extension 302 of the lead 30 in the lead 31 may be slightly less than the impedance of the WOA 42 to make the impedance of the extension 302 (or the difference in impedance between the two extensions) is equal to the sum of the impedance and the capacitive reactance of WOA42.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种显示装置，属于显示技术领域，解决了由于WOA的阻值造成的水平区块不良的技术问题，可用于液晶电视、液晶显示器、手机、平板电脑等显示装置。显示装置包括基板（2）和至少两个用于传输栅极驱动信号的覆晶薄膜COF（11，12），基板（2）上形成有至少两组扇形引线（3，31，32），各个COF（11，12）与各组扇形引线（3，31，32）一一对应相连，相邻的COF（11，12）之间通过基板（2）走线WOA（41，42）连接，在相邻的两组扇形引线（3，31，32）中，前一组扇形引线（31）的阻值大于后一组扇形引线（32）的阻值。

Description

显示装置
本申请要求享有2014年7月21日提交的名称为“显示装置”的中国专利申请CN201410348615.3的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及显示技术领域，具体地说，涉及一种显示装置。
背景技术
随着显示技术的发展，液晶显示器已经成为最为常见的平板显示装置。在液晶显示器中，由基板上纵横交错的栅线和数据线控制各个像素，以实现图像的显示。
目前，为了节省成本，经常将栅极驱动电路和数据电路制作在同一块印刷电路板(PCB)上，再利用基板走线(Wire On Array，简称WOA)将该PCB与用于传输栅极驱动信号的覆晶薄膜(Chip On Film，简称COF)连接。液晶显示器中通常包括至少两个用于传输栅极驱动信号的COF，相邻的两个COF之间也通过WOA连接。每个COF分别与基板上的一组扇形引线(fanout)相连，并通过扇形引线连接至各条栅线。
由于WOA具有一定的阻值，所以与后一个COF相连的栅线的阻值，会比与前一个COF相连的栅线的阻值大，使得这两条栅线上的栅极驱动信号的波形产生差异。在两个COF的交界处，也就是前一个COF连接的最后一条栅线与后一个COF连接的第一条栅线上的栅极驱动信号的波形差异会显得特别明显。尤其是经过信赖性高温高湿测试之后，会使薄膜晶体管(Thin Film Transistor，简称TFT)特性曲线偏移，漏电流增大或充电变得不足，使该波形差异更加明显，导致液晶显示器在COF的交界处出现线状的亮斑或暗斑(mura)，也就是水平区块不良(Hblock)，影响了液晶显示器的显示效果。
发明内容
本发明的目的在于提供一种显示装置，以解决由于WOA的阻值造成的水平区块不良 的技术问题。
本发明提供一种显示装置，包括基板和至少两个用于传输栅极驱动信号的覆晶薄膜COF，所述基板上形成有至少两组扇形引线，各个所述COF与各组所述扇形引线一一对应相连，相邻的COF之间通过基板走线WOA连接，在相邻的两组扇形引线中，前一组扇形引线的阻值大于后一组扇形引线的阻值。
优选的，相邻的两组扇形引线的阻值之差，等于与该两组扇形引线对应相连的两个COF之间的WOA的阻值。
进一步，一组所述扇形引线中包括若干条引线，每条所述引线连接所述基板上的一条栅线；
在同一组扇形引线中，各条引线的阻值相等。
进一步，在每组扇形引线中，引线由扇形段和延伸段组成。
或者，在最后一组扇形引线中，引线仅具有扇形段；
在其余各组扇形引线中，引线由扇形段和延伸段组成。
进一步，每组扇形引线中，引线的扇形段的阻值均相等；
在相邻的两组扇形引线中，前一组扇形引线中引线的延伸段的阻值大于后一组扇形引线中引线的延伸段的阻值。
优选的，相邻的两组扇形引线中引线的延伸段的阻值之差，等于与该两组扇形引线对应相连的两个COF之间的WOA的阻值。
优选的，所述延伸段呈折线形、曲线形或波浪线形。
进一步，该显示装置还包括栅极驱动电路，第一个COF通过WOA连接至所述栅极驱动电路。
本发明带来了以下有益效果：本发明提供的显示装置中，在任意两组相邻的扇形引线中，前一组扇形引线的阻值都大于后一组扇形引线的阻值，而在栅极驱动信号的传输过程中，后一组扇形引线会比前一组扇形引线多经过一个WOA。这样就可以使后一组扇形引线的阻值与该WOA的阻值之和，能够接近于，甚至等于前一组扇形引线的阻值，以消除栅极驱动信号的波形差异，从而解决了由于WOA的阻值造成的水平区块不良的技术问题，改善了显示装置的显示效果。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要的附图做简单的介绍：
图1是本发明实施例提供的显示装置的示意图；
图2是图1中扇形引线部分的局部示意图。
具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形成的技术方案均在本发明的保护范围之内。
本发明实施例提供的显示装置，包括基板、印刷电路板(PCB)，及分别用于传输栅极驱动信号和数据信号的若干个COF。
如图1所示，本实施例中具有两个用于传输栅极驱动信号的COF11、12，基板2上形成有两组扇形引线31、32。在其他实施方式中，也可以具有三个COF及三组扇形引线，或者更多的COF及扇形引线。
各个COF11、12与各组扇形引线31、32一一对应相连，相邻的COF11、12之间通过WOA42连接。此外，栅极驱动电路(图中未示出)设置于PCB5中，第一个COF11通过WOA41连接至PCB5中的栅极驱动电路。
在相邻的两组扇形引线31、32中，前一组扇形引线31的阻值大于后一组扇形引线32的阻值。作为一个优选方案，相邻的两组扇形引线31、32的阻值之差，等于与该两组扇形引线31、32对应相连的两个COF11、12之间的WOA42的阻值。
本发明实施例提供的显示装置中，前一组扇形引线31的阻值大于后一组扇形引线32的阻值，而在栅极驱动信号的传输过程中，后一组扇形引线32会比前一组扇形引线31 多经过WOA42。这样就可以使后一组扇形引线32的阻值与该WOA42的阻值之和，等于前一组扇形引线31的阻值，以消除栅极驱动信号的波形差异，从而解决了由于WOA42的阻值造成的水平区块不良(Hblock)的技术问题，改善了显示装置的显示效果。
如图1和图2所示，本实施例中，一组扇形引线3中包括若干条引线30，每条引线30连接基板2上的一条栅线6。在同一组扇形引线3中，各条引线30的阻值相等，使得与同一组扇形引线3相连的各条栅线6的阻值相等，以保证各条栅线6上栅极驱动信号的波形一致。
在每组扇形引线3中，引线30由扇形段301和延伸段302组成。每组扇形引线3中，引线30的扇形段301的阻值均相等。在相邻的两组扇形引线31、32中，前一组扇形引线31中引线30的延伸段302的阻值大于后一组扇形引线32中引线30的延伸段302的阻值。相当于在现有技术中的扇形引线的基础上增加了延伸段，以便于进行阻值的补偿调整。
延伸段302的形状可以呈折线形、曲线形或波浪线形，这样可以在有限的空间内增加延伸段302的长度，使延伸段302的阻值达到足够大。在最后一组扇形引线32中，引线30的延伸段302的阻值越小越好，应当尽量趋近于零，所以其延伸段302可以制成直线型，以降低其阻值。
在其他实施方式中，最后一组扇形引线中的引线也可以仅具有扇形段，不具有延伸段，由扇形段直接与栅线相连；而其余各组扇形引线中，引线仍然由扇形段和延伸段组成。
此外，在引线30的扇形段301，位于扇形引线3的两端的引线30的扇形段301是以一定角度斜向设置的，越靠近扇形引线3的中间，引线30的扇形段301的角度越来越小。为使各不同角度的扇形段301的阻值相等，位于扇形引线3中间的引线30的扇形段301也可以设置为折线形、曲线形或波浪线形，使各扇形段301的长度相等，从而具有相等的阻值。
作为一个优选方案，相邻的两组扇形引线31、32中引线30的延伸段302的阻值之差，等于与该两组扇形引线31、32对应相连的两个COF11、12之间的WOA42的阻值。
为了更为直观的说明本发明实施例中栅线6的阻值，可以将WOA41的阻值表示为R1；WOA42的阻值表示为R2；前一组扇形引线31中引线30的扇形段301的阻值与后一组扇形引线32中引线30的扇形段301的阻值相等，均为R3；前一组扇形引线31中引线30的延伸段302的阻值为R2’，且R2’与WOA42的阻值R2相等；后一组扇形引线32中引线30的延伸段302的阻值则趋近于零。则与前一组扇形引线31中的最后一条引 线30相连的栅线6A的阻值RA＝R1+R3+R2’，与后一组扇形引线32中的第一条引线30相连的栅线6B的阻值RB＝R1+R2+R3。因为R2＝R2’，所以RA＝RB，即这两条栅线6A、6B的阻值相等，从而消除了这两条栅线6A、6B上栅极驱动信号的波形差异，本发明实施例提供的显示装置解决了由于WOA42的阻值造成的水平区块不良(Hblock)的技术问题，改善了显示装置的显示效果。
此外栅极驱动信号在WOA42上的传输过程中，除WOA42的阻抗对栅极驱动信号产生的主要干扰之外，WOA42的容抗也会对栅极驱动信号产生微小的干扰，所以前一组扇形引线31中引线30的延伸段302的阻值(或前一组扇形引线与后一组扇形引线中引线的延伸段的阻值之差)可以略小于WOA42的阻抗，使该延伸段302的阻抗(或该两个延伸段的阻抗之差)等于WOA42的阻抗与容抗之和。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (9)

  1. 一种显示装置，包括基板和至少两个用于传输栅极驱动信号的覆晶薄膜COF，所述基板上形成有至少两组扇形引线，各个所述COF与各组所述扇形引线一一对应相连，相邻的COF之间通过基板走线WOA连接，其中，在相邻的两组扇形引线中，前一组扇形引线的阻值大于后一组扇形引线的阻值。
  2. 如权利要求1所述的显示装置，其中，相邻的两组扇形引线的阻值之差，等于与该两组扇形引线对应相连的两个COF之间的WOA的阻值。
  3. 如权利要求1所述的显示装置，其中，一组所述扇形引线中包括若干条引线，每条所述引线连接所述基板上的一条栅线；
    在同一组扇形引线中，各条引线的阻值相等。
  4. 如权利要求3所述的显示装置，其中，在每组扇形引线中，引线由扇形段和延伸段组成。
  5. 如权利要求3所述的显示装置，其中，在最后一组扇形引线中，引线仅具有扇形段；
    在其余各组扇形引线中，引线由扇形段和延伸段组成。
  6. 如权利要求4所述的显示装置，其中，每组扇形引线中，引线的扇形段的阻值均相等；
    在相邻的两组扇形引线中，前一组扇形引线中引线的延伸段的阻值大于后一组扇形引线中引线的延伸段的阻值。
  7. 如权利要求6所述的显示装置，其中，相邻的两组扇形引线中引线的延伸段的阻值之差，等于与该两组扇形引线对应相连的两个COF之间的WOA的阻值。
  8. 如权利要求4所述的显示装置，其中，所述延伸段呈折线形、曲线形或波浪线形。
  9. 如权利要求1所述的显示装置，其中，还包括栅极驱动电路，第一个COF通过WOA连接至所述栅极驱动电路。
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