CN102800296A - 液晶显示器及相关配向方法 - Google Patents

液晶显示器及相关配向方法 Download PDF

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CN102800296A
CN102800296A CN2012103216390A CN201210321639A CN102800296A CN 102800296 A CN102800296 A CN 102800296A CN 2012103216390 A CN2012103216390 A CN 2012103216390A CN 201210321639 A CN201210321639 A CN 201210321639A CN 102800296 A CN102800296 A CN 102800296A
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orientation
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CN102800296B (zh
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蔡轩名
吕安序
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Optoelectronic Science Co ltd
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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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    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
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Abstract

液晶显示器包含显示面板、多工器、配向电路，以及短路杆电路。多工器依据多个开关控制信号和输入数据信号来提供多笔输出数据信号。在配向周期内，配向电路提供配向电压至显示面板，而短路杆电路将多工器电性耦接至预定电压。

Description

液晶显示器及相关配向方法
【技术领域】
本发明相关于一种液晶显示器及相关配向方法，尤指一种能在配向时提供静电防护以改善画面不均的液晶显示器及相关配向方法。
【背景技术】
随着大尺寸液晶显示面板的快速发展，液晶显示面板必须具备广视角特性，方能满足使用上的需求。多区域垂直配向(multi-domain vertical alignment，MVA)液晶显示面板因具有广视角与快速反应时间(response time)等特性，因而成为目前大尺寸平面显示面板的主流产品。
现有MVA液晶显示面板系通过凸块结构来使不同区域的液晶分子具备不同的预倾角(pre-tilt angle)，藉此发挥广视角的作用，然而凸块结构不但会增加了制程的复杂度，且会遮蔽部分光线，因此造成开口率(aperture ratio)的下降，进而降低了液晶显示面板的亮度表现。
因此，业界另研发出一种高分子聚合配向(polymer stability alignment，PSA)制程，或称为相分离配向(phase separation alignment，PSA)制程，其利用高分子聚合物来取代MVA液晶显示面板中的凸块结构。PSA技术的核心在于液晶面板上所形成的配向膜，其制作的方式在于原始的液晶分子中加入少许的聚合物单体(monomer)。在对组后，先以能量光照射以及加热液晶显示面板以固化框胶，再施加配向电压，使部分区域的液晶分子在靠近聚酰亚胺(polyimide)的区域有一预倾角，再照能量光来固定预倾角。
图1为现有技术中一液晶显示器600的示意图。液晶显示器600包含一液晶显示面板、一栅极驱动电路、一源极驱动或测试电路、一多工器，以及一配向电路。液晶显示面板采用PSA制程上，其设有多条数据线、多条栅极线，以及多个画素（未显示于图1）。栅极驱动电路可提供导通每行画素所需的栅极驱动信号。源极驱动或测试电路可提供数据信号DIN以充电相对应的列画素。依据数据信号DIN和开关控制信号SW1～SWM，多工器可输出数据信号DOUT1～DOUTM至液晶显示面板。
在配向周期内，先前技术液晶显示器的多工器为浮接，若因配向电压不稳或静电而影响液晶配向，会造成画面不均（mura）的情形，因此会降低显示品质。
【发明内容】
本发明提供一种液晶显示器，其包含一显示面板、一多工器、一第一配向电路，以及一第一短路杆电路。该显示面板包含多个画素；多条数据线，沿着一第一方向设置且分别电性耦接于该多个画素；以及多条栅极线，沿着一第二方向设置且分别电性耦接于该多个画素。该多工器设置于该显示面板的一第一侧，用来依据多个第一开关控制信号和一输入数据信号来提供多笔输出数据信号。该多工器包含一输入端，用来接收该输入数据信号；多个输出端，电性耦接于所述数据线，分别用来输出该多笔输出数据信号；以及多个第一开关，分别依据该多个第一开关控制信号来控制该输入端和该多个输出端之间的信号传输路径。该第一配向电路，用来在一配向周期内提供一配向电压至该多条数据线。该第一短路杆电路，用来在该配向周期内将该多工器电性耦接至一预定电压，使多工器截止或导通。进而此液晶显示器能够改善画面配向不均。
本发明另提供一种对液晶显示器配向的方法，其包含提供一液晶显示器，其中该液晶显示器包含一多工器，一具有多个画素的显示面板，该多工器具有一输入端、多个输出端及多个第一开关，所述第一开关分别依据多个第一开关控制信号来控制该输入端和该多个输出端之间的信号传输路径，且该多工器的输出端电性耦接所述画素；在一配向周期内提供一配向电压至该多条数据线，并在该配向周期内以一能量光照射该液晶显示器；以及在该配向周期内将该多工器电性耦接至一预定电压，以控制该多个第一开关信号为同一电压准位。进而此液晶显示器的配向方法能够改善画面配向不均。
【附图说明】
图1为先前技术中一液晶显示器的示意图。
图2为本发明第一实施例中液晶显示器结构与运作的示意图。
图3为本发明第二实施例中液晶显示器结构与运作的示意图。
图4为本发明第三实施例中液晶显示器结构与运作的示意图。
图5为本发明第四实施例中液晶显示器结构与运作的示意图。
图6为本发明第五实施例中液晶显示器结构与运作的示意图。
【主要元件符号说明】
100、200、300、400、500        液晶显示器
10                             液晶显示面板
20                             栅极驱动电路
30                             源极驱动或测试电路
40                             多工器
50、55                         配向电路
60                             短路杆电路
62、64、72、74                 传输逻辑闸
66、76                         电压缓冲器
70                                  静电保护电路
PX                                  画素
DL1～DLM                            数据线
GL1～GLN                            栅极线
A1～AM、B1～BM、C1～CM、T1～TN      开关
SR1～SRN 移位暂存器
【具体实施方式】
图2至图6为本发明实施例中液晶显示器结构与运作的示意图。图2所示的液晶显示器100包含一液晶显示面板10、一栅极驱动电路20、一源极驱动或测试电路30、一多工器40、一第一配向电路50，以及一短路杆电路60。图3所示的液晶显示器200包含一液晶显示面板10、一栅极驱动电路20、一源极驱动或测试电路30、一多工器40、一第一配向电路50和一第二配向电路55。图4所示的液晶显示器300和图5所示的液晶显示器400各包含一液晶显示面板10、一栅极驱动电路20、一源极驱动或测试电路30、一多工器40、一第一配向电路50、一第二配向电路55，以及一短路杆电路60。图6所示的液晶显示器500包含一液晶显示面板10、一栅极驱动电路20、一源极驱动或测试电路30、一多工器40、一第一配向电路50、一短路杆电路60，以及一静电保护电路70。
在本发明的实施例中，液晶显示面板10系采用PSA制程，其主动区域内设有多条数据线DL1～DLM（M为大于1的正整数）、多条栅极线GL1～GLN（N为大于1的正整数），以及多个画素PX。栅极驱动电路20可提供导通每列画素所需的栅极驱动信号，而源极驱动或测试电路30和多工器40可提供充电每行画素所需的数据信号。
图2为本发明第一实施例中液晶显示器结构与运作的示意图。如同图2所示，本发明第一实施例的液晶显示器100以单边驱动方式来进行配向，并在配向时提供静电防护。在配向周期内，第一配向电路50可提供一配向电压VPSA至数据线DL1～DLM，而短路杆电路60可将多工器40电性耦接至一预定电压VMUX以截止多工器40。截止的多工器40能阻挡来自源极驱动或测试电路30的静电传送至数据线DL1～DLM，进而改善画面不均的情形。
图3为本发明第二实施例中液晶显示器结构与运作的示意图。如同图3所示，本发明第二实施例的液晶显示器200以双边驱动方式来进行配向，并在配向时提供静电防护。第一配向电路50和第二配向电路55分别设置于液晶显示面板10的两对向侧。在配向周期内，第一配向电路50可提供一配向电压VPSA至数据线DL1～DLM的第一侧，第二配向电路55可提供配向电压VPSA至数据线DL1～DLM的第二侧，而多工器40为浮接。第二配向电路55可分享来自源极驱动或测试电路30的静电，进而改善画面不均的情形。
图4为本发明第三实施例中液晶显示器结构与运作的示意图。如同图4所示，本发明第三实施例的液晶显示器300以双边驱动方式来进行配向，并在配向时提供静电防护。第一配向电路50和第二配向电路55分别设置于液晶显示面板10的两对向侧，其中第一配向电路55设置在液晶显示面板10和多工器40之间。在配向周期内，第一配向电路50可提供一配向电压VPSA至数据线DL1～DLM的第一侧，第二配向电路55可提供配向电压VPSA至数据线DL1～DLM的第二侧，而短路杆电路60可将多工器40电性耦接至一预定电压VMUX以截止多工器40。截止的多工器40能阻挡来自源极驱动或测试电路30的静电传送至数据线DL1～DLM，进而改善画面不均的情形。
图5为本发明第四实施例中液晶显示器结构与运作的示意图。如同图5所示，本发明第四实施例的液晶显示器400以双边驱动方式来进行配向，并在配向时提供静电防护。第一配向电路50和第二配向电路55分别设置于液晶显示面板10的两对向侧，其中多工器40设置在液晶显示面板10和第二配向电路55之间。在配向周期内，短路杆电路60可将多工器40电性耦接至一预定电压VMUX以导通多工器40，第一配向电路50可提供一配向电压VPSA至数据线DL1～DLM的第一侧，而第二配向电路55可将配向电压VPSA通过导通的多工器40传送至数据线DL1～DLM的第二侧。第二配向电路55可分享多工器40输入端的静电，进而改善画面不均的情形。
图6为本发明第五实施例中液晶显示器结构与运作的示意图。如同图6所示，本发明第五实施例的液晶显示器500以单边驱动方式来进行配向，并在配向时提供静电防护。在配向周期内，第一配向电路50可提供一配向电压VPSA至数据线DL1～DLM，而短路杆电路60可将多工器40电性耦接至一预定电压VMUX以截止多工器40。静电保护电路70设置于源极驱动或测试电路30和多工器40的输入端之间。静电保护电路70可分享来自源极驱动或测试电路30的静电，截止的多工器40能阻挡来自源极驱动或测试电路30的静电传送至数据线DL1～DLM，进而改善画面不均的情形。
在图6所示的实施例中，静电保护电路70可包含一第一二极体和一第二二极体。第一二极体的阳极电性耦接至一低准位电位VGL，而阴极电性耦接至多工器40的输入端。第二二极体的阳极电性耦接至多工器40的输入端，而阴极电性耦接至一高准位电位VGH。然而，图6所示的静电保护电路70仅为实施例，并不限定本发明的范畴。
在本发明的实施例中，栅极驱动电路20可包含上拉开关T1～TN和移位暂存器SR1～SRN，每一上拉开关的第一端用来接收一偏压VGH、第二端电性耦接至一相对应的栅极线，而控制端用来接收一控制信号CTL。控制信号CTL在配向周期内通过低准位的信号导通上拉开关T1～TN，进而通过偏压VGH导通画素PX以接收配向电压VPSA。控制信号CTL可在显示器显示图像时通过高准位的信号截止上拉开关T1～TN，进而防止上拉开关T1～TN一端的偏压VGH进入栅极线GL1～GLN，并且控制信号CTL可以通过电压缓冲器66反相后截止开关B1～BM，进而阻挡画素PX接收配向电压VPSA。
在本发明的实施例中，多工器40可为1对M的架构，包含一输入端、M个输出端，和M个开关A1～AM。多工器40的输入端电性耦接至源极驱动或测试电路30以接收一输入信号DIN。开关A1～AM分别依据控制信号SW1～SWM来控制输入端和输出端之间的信号传送路径，使得多工器40能分别输出数据信号DOUT1～DOUTM至数据线DL1～DLM。
在本发明的实施例中，配向电路50和55可各包含M个开关B1～BM，传输逻辑闸62、64，和一电压缓冲器66。开关B1～BM的第一端分别电性耦接至数据线DL1～DLM，第二端用来接收一配向电压VPSA，而控制端电性耦接至电压缓冲器66的输出端。传输逻辑闸62和64的第一控制端电性耦接至上拉开关T1～TN的控制端，传输逻辑闸62和64的第二控制端用来接收一偏压VGL，传输逻辑闸62和64的输入端用来接收一偏压VCOM，传输逻辑闸62的输出端电性耦接至电压缓冲器66的输入端，而传输逻辑闸64的输出端用来接收偏压VGL。其中，VGH可为一高准位电压，VGL可为一低准位电压，而VCOM可为一共同电压。
在本发明的实施例中，短路杆电路60可包含M个开关C1～CM，传输逻辑闸72、74，和一电压缓冲器76。开关C1～CM的第一端分别电性耦接至开关A1～AM的控制端，第二端用来接收一预定电压VMUX，而控制端电性耦接至电压缓冲器76的输出端。传输逻辑闸72和74的第一控制端电性耦接至上拉开关T1～TN的控制端，传输逻辑闸72和74的第二控制端用来接收一偏压VGL，传输逻辑闸72和74的输入端用来接收一偏压VCOM，传输逻辑闸72的输出端电性耦接至电压缓冲器76的输入端，而传输逻辑闸74的输出端用来接收偏压VGL。其中，VGH可为一高准位电压，VGL可为一低准位电压，而VCOM可为一共同电压。
在配向周期内，控制信号CTL会导通开关B1～BM，使得数据线DL1～DLM能被电性耦接至配向电压VPSA。同时，控制信号CTL会导通开关C1～CM，使得开关A1～AM的控制端能被电性耦接至预定电压VMUX。
在本发明实施例的液晶显示器100、200、300和500中，预定电压VMUX的值设定为开关A1～AM的截止电压或小于开关A1～AM的导通电压，因此可在配向周期内截止多工器40。截止的多工器40能阻挡来自源极驱动或测试电路30的静电传送至数据线DL1～DLM，进而改善画面不均的情形。
在本发明实施例的液晶显示器400中，预定电压VMUX的值设定为开关A1～AM的导通电压或大于开关A1～AM的导通电压，因此可在配向周期内导通多工器40以将配向电路55提供的配向电压VPSA传送至数据线DL1～DLM。配向电路55可分享多工器40输入端的静电，进而改善画面不均的情形。
在配向周期内，本发明的液晶显示器会将多工器电性耦接至一预定电压，以避免因配向电压不稳或静电而影响液晶配向，进而改善画面不均（mura）的情形以提高显示品质。
以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所做的均等变化与修饰，皆应属本发明的涵盖范围。

Claims (11)

1.一种液晶显示器，其包含：
一显示面板，包含：
多个画素；
多条数据线，沿着一第一方向设置且分别电性耦接于该多个画素；以及
多条栅极线，沿着一第二方向设置且分别电性耦接于该多个画素；
一多工器，设置于该显示面板的一第一侧，用来依据多个第一开关控制信号和一输入数据信号来提供多笔输出数据信号，该多工器包含：
一输入端，用来接收该输入数据信号；
多个输出端，电性耦接于该多条数据线，分别用来输出该多笔输出数据信号；以及
多个第一开关，分别依据该多个第一开关控制信号来控制该输入端和该多个输出端之间的信号传输路径；
一第一配向电路，用来在一配向周期内提供一配向电压至该多条数据线；以及
一第一短路杆电路，用来在该配向周期内将该多工器电性耦接至一预定电压。
2.根据权利要求1所述的液晶显示器，其特征在于，该第一短路杆电路系用来在该配向周期内提供该预定电压以截止该多工器。
3.根据权利要求1所述的液晶显示器，其特征在于，其另包含：
一第二配向电路，设置于该显示面板相对于该第一配向电路的对侧，电性耦接于该多条数据线，用来在该配向周期内提供该配向电压至该多条数据线。
4.根据权利要求3所述的液晶显示器，其特征在于：
该多工器系设置于该显示面板和该第二配向电路之间；
该配向电压系经由该多工器传输至该多条数据线；且
该第一短路杆电路系用来在该配向周期内提供该预定电压以导通该多工器。
5.根据权利要求1所述的液晶显示器，其特征在于，其另包含：
一静电保护电路，设置于该显示面板的该第一侧，电性耦接至该多工器的该输入端，该静电保护电路包含：
一第一二极体，其阳极电性耦接至一低准位电位，而其阴极电性耦接至该多工器的该输入端；以及
一第二二极体，其阳极电性耦接至该多工器的该输入端，而其阴极电性耦接至一高准位电位。
6.根据权利要求1所述的液晶显示器，其特征在于：
每一栅极线电性电性耦接至一上拉开关，该上拉开关的控制端用以接收一第二开关控制信号，该上拉开关的第一端用以接收一高准位电压，该上拉开关的第二端电性耦接该栅极线；
该第一配向电路包含：
多个第二开关，每一第二开关包含：
一控制端；
一第一端，用以接收该配向电压；以及
一第二端，电性耦接至一相对应的数据线；
一第一传输逻辑闸，包含：
一输入端，用以接收一共同电压；
一第一控制端，电性耦接于所述上拉开关的控制端；
一输出端，电性耦接于该该第一传输逻辑闸的该第一控制端；以及
一第二控制端，用以接收一低准位电压；
一第二传输逻辑闸，包含：
一输入端，用以接收该共同电压；
一第一控制端，电性耦接于所述上拉开关的该控制端；
一输出端，电性耦接于该第一传输逻辑闸的该第二控制端；以及
一第二控制端，电性耦接于该第一传输逻辑闸的该第二控制端；以及
一电压缓冲器，包含：
一输入端，电性耦接于该第一传输逻辑闸的该输出端；以及
一输出端，电性耦接于所述第二开关的该控制端。
7.根据权利要求1所述的液晶显示器，其特征在于：
每一栅极线电性耦接至一上拉开关，该上拉开关的控制端用以接收一第二开关控制信号，该上拉开关的第一端用以接收一高准位电压，该上拉开关的第二端电性耦接该栅极线；
该第一短路杆电路包含多个第二开关，每一第二开关包含：
一控制端，用以接收该第二开关控制信号；
一第一端，用以接收该预定电压；以及
一第二端，电性耦接至该多工器中一相对应的输出端。
8.一种对液晶显示器配向的方法，其特征在于，其包含：
提供一液晶显示器，其中该液晶显示器包含一多工器，一具有多个画素的显示面板，该多工器具有一输入端、多个输出端及多个第一开关，所述第一开关分别依据多个第一开关控制信号来控制该输入端和该多个输出端之间的信号传输路径，且该多工器的输出端电性耦接所述画素；
在一配向周期内提供一配向电压至该多条数据线，并在该配向周期内以一能量光照射该显示面板；以及
在该配向周期内将该多工器电性耦接至一预定电压，以控制该多个第一开关信号为同一电压准位。
9.根据权利要求8所述的方法，其特征在于，其另包含：
在该配向周期内将该多工器电性耦接至该预定电压，以控制所述第一开关信号为同一电压准位，并通过该预定电压截止该多工器的该多个第一开关。
10.根据权利要求8所述的方法，其特征在于，其另包含：
在该配向周期内，传输该配向电压至该多条数据线的一第一侧，并经由该多工器传输该配向电压至该多条数据线的一第二侧。
11.根据权利要求8所述的方法，其特征在于，其另包含：
在该配向周期内将该多工器电性耦接至该预定电压，以控制所述第一开关信号为同一电压准位，并通过该预定电压导通该多工器的所述第一开关；以及
在该配向周期内通过该多工器的该多个第一开关提供该该配向电压至该多条数据线。
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